Rubber seismic isolation bearing
By adjusting the height of the locking bolts and using modularly designed rubber seismic isolation bearings, the problems of structural damage and height difference adjustment in traditional building seismic design have been solved, achieving stable load-bearing, real-time monitoring, and convenient replacement, thereby improving the seismic performance of buildings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI XINGMA RUBBER TECHNOLOGY CO LTD
- Filing Date
- 2025-08-06
- Publication Date
- 2026-07-03
AI Technical Summary
In traditional seismic design of buildings, rigid connection structures are easily damaged during earthquakes, and it is difficult to balance economy and seismic performance. Existing technologies are also unable to effectively adjust the height difference of rubber seismic isolation bearings and replace the devices.
A rubber seismic isolation bearing was designed. By adjusting the height of the four corner locking bolts, combined with the rubber seismic isolation bearing assembly and replaceable connecting components, the height difference can be adjusted and the device can be replaced, enhancing the vertical bearing capacity and real-time monitoring. The modular design facilitates the replacement of vulnerable parts.
It provides strong and stable vertical load-bearing capacity, monitors loads in real time to ensure structural safety, adapts to the load-bearing requirements of buildings of different sizes, reduces the impact of earthquakes on the superstructure, and facilitates component replacement, thereby improving seismic performance.
Smart Images
Figure CN224452362U_ABST
Abstract
Description
Technical Field
[0001] The embodiments disclosed herein relate to the field of building seismic isolation technology, and more specifically, to a rubber seismic isolation bearing. Background Technology
[0002] Traditional earthquake-resistant building design primarily employs a "resistance" strategy, which involves firmly connecting the superstructure to the foundation. This aims to resist seismic forces by enhancing the structure's strength and rigidity, such as by using thicker steel bars and increasing the amount of concrete. However, practice has shown that this approach has many limitations. During an earthquake, the complex ground motion is transmitted to the superstructure through the foundation. Traditional rigidly connected building structures are prone to damage at weak points under seismic forces. Moreover, the energy of ground motion is uncertain. When encountering a strong earthquake exceeding the structural design capacity, even reinforced buildings may struggle to withstand it, ultimately leading to severe structural damage or even collapse. Furthermore, traditional earthquake-resistant methods often require significant investment in building materials and construction costs, making it difficult to achieve an ideal balance between economic efficiency and earthquake resistance. Utility Model Content
[0003] To overcome the above-mentioned defects, the embodiments of this disclosure provide a rubber seismic isolation bearing that can solve the problem of adjusting the height difference of the rubber seismic isolation bearing or replacing the seismic isolation bearing without adding an additional rubber seismic isolation bearing replacement device, by adjusting the height of the four corner locking bolts.
[0004] According to one aspect, at least one embodiment of the present disclosure provides a rubber seismic isolation bearing, comprising:
[0005] A lower connecting plate, wherein an upper connecting plate is provided at the upper end of the lower connecting plate;
[0006] Replace the connecting component, wherein the replacement connecting component is located at the bottom of the lower connecting plate;
[0007] The replacement connecting component includes a mounting groove, in which an installation plate is embedded. A locking bolt is provided on the installation plate, with the lower end of the locking bolt placed at the lower end of the lower connecting plate. A locking sleeve is provided on the locking bolt, and a reaction force bearing plate is provided at the lower end of the locking sleeve. A lower pre-embedded anchor bar is provided at the lower end of the reaction force bearing plate.
[0008] As a further technical solution, the locking sleeve is provided with a replacement sleeve inside, the replacement sleeve is provided with a plug sleeve inside, the plug sleeve is provided with a locking ring inside, and the locking ring is threadedly connected to the locking bolt.
[0009] As a further technical solution, the rubber seismic isolation bearing assembly includes a seismic isolation bearing body, an isolation cavity is provided inside the seismic isolation bearing body, an isolation strip is provided inside the isolation cavity, and an inner rubber sheet is provided inside the isolation strip.
[0010] As a further technical solution, the number of the vibration isolation strips is several, and the several vibration isolation strips are located on the upper and lower end faces inside the vibration isolation cavity.
[0011] As a further technical solution, the upper connecting plate is disposed on the upper end surface of the seismic isolation bearing body, and the shape of the upper connecting plate matches that of the lower connecting plate.
[0012] As a further technical solution, the upper end of the upper connecting plate is provided with an upper pre-embedded anchor bar, which is located at the four corners of the upper connecting plate, and the positions of the upper pre-embedded anchor bar correspond to those of the lower pre-embedded anchor bar.
[0013] As a further technical solution, the mounting groove has a circular structure, and the mounting plate matches the structure of the mounting groove.
[0014] As a further technical solution, the inner wall of the locking sleeve is provided with a positioning pin, and the outer wall of the insertion sleeve is provided with a positioning block, the positioning block and the positioning pin being engaged.
[0015] The beneficial effects of the embodiments disclosed herein are as follows:
[0016] In this disclosure, the lower connecting plate, the upper connecting plate, and the thin steel plate in the rubber seismic isolation bearing assembly work together to provide the rubber seismic isolation bearing with strong and stable vertical load-bearing capacity. The lower connecting plate can evenly distribute the vertical load transmitted from the upper structure. The upper connecting plate is equipped with a pressure sensor to monitor the load in real time and ensure structural safety. The thin steel plate is embedded in the rubber layer, which enhances the vertical stiffness and enables the bearing to withstand the huge weight of the building. Taking common building application scenarios as an example, a single rubber seismic isolation bearing can withstand vertical loads ranging from several tons to hundreds of tons, meeting the load-bearing requirements of buildings of different sizes and ensuring the vertical stability of the building under daily use and extreme conditions such as earthquakes. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.
[0018] Figure 1This is a schematic diagram of a structure in one embodiment of the present disclosure;
[0019] Figure 2 This is a cross-sectional view of the seismic isolation bearing body disclosed herein;
[0020] Figure 3 This is a cross-sectional view of the mounting plate disclosed herein;
[0021] Figure 4 This is a side view of the locking sleeve of this disclosure;
[0022] In the diagram: 1. Lower connecting plate; 2. Upper connecting plate; 3. Replacement connecting assembly; 3-1. Installation groove; 3-2. Mounting plate; 3-3. Locking bolt; 3-4. Locking sleeve; 3-5. Reaction bearing plate; 3-6. Lower embedded anchor bar; 3-7. Replacement sleeve; 3-8. Insertion sleeve; 3-9. Locking ring; 4. Rubber seismic isolation bearing assembly; 4-1. Seismic isolation bearing body; 4-2. Seismic isolation cavity; 4-3. Seismic isolation strip; 4-4. Internal rubber sheet; 5. Upper embedded anchor bar; 6. Positioning pin; 7. Positioning block. Detailed Implementation
[0023] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.
[0024] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0025] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0026] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0027] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.
[0028] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0029] like Figures 1-4 As shown, a rubber seismic isolation bearing of this disclosure is illustrated, comprising:
[0030] The lower connecting plate 1 has an upper connecting plate 2 at its upper end;
[0031] Replace the connecting component 3, which is located at the bottom of the lower connecting plate 1;
[0032] The replacement connecting component 3 includes a mounting groove 3-1, inside which is installed a mounting plate 3-2. A locking bolt 3-3 is provided on the mounting plate 3-2. The lower end of the locking bolt 3-3 is placed at the lower end of the lower connecting plate 1. A locking sleeve 3-4 is provided on the locking bolt 3-3. A reaction force bearing plate 3-5 is provided at the lower end of the locking sleeve 3-4. A lower pre-embedded anchor bar 3-6 is provided at the lower end of the reaction force bearing plate 3-5.
[0033] The rubber seismic isolation bearing assembly 4 includes a seismic isolation bearing body 4-1, an isolation cavity 4-2 is provided inside the seismic isolation bearing body 4-1, an isolation strip 4-3 is provided inside the isolation cavity 4-2, and an internal rubber sheet 4-4 is provided inside the isolation strip 4-3.
[0034] In some examples, the lower connecting plate 1, as part of the entire rubber seismic isolation bearing, plays a crucial role in load bearing and stability. An upper connecting plate 2 with a pressure sensor is precisely installed at its upper end. The function of the upper connecting plate 2 with the pressure sensor is to monitor the load transmitted from the superstructure in real time, providing data for subsequent structural analysis and safety assessment. During actual installation, it is necessary to ensure that the horizontal and vertical alignment of the lower connecting plate 1 meets the design requirements. This is achieved through calibration using measuring instruments such as levels and theodolites. For example, in building construction, a high-precision level is used to measure the surface of the lower connecting plate 1 to ensure that its horizontal deviation is within the allowable range, preventing problems caused by the tilting of the lower connecting plate 1. To address the inaccurate measurement data of the upper connecting plate 2 and the uneven stress on the entire seismic isolation bearing, during the assembly of the seismic isolation bearing, the mounting plate 3-2 is placed above the placement groove 3-1. Then, with manual assistance, the mounting plate 3-2 is accurately lowered into the placement groove 3-1. A feeler gauge is used to check the gap between the mounting plate 3-2 and the placement groove 3-1 to ensure that the gap is uniform. The mounting plate 3-2 is equipped with a locking bolt 3-3. During installation, the locking bolt 3-3 is passed through the reserved hole on the mounting plate 3-2, and then the lower end of the locking bolt 3-3 extends out of the lower connecting plate 1. The locking sleeve 3-4, the reaction bearing plate 3-5, and the lower embedded anchor bar 3-6 are installed sequentially on the locking bolt 3-3.
[0035] The seismic isolation bearing body 4-1 contains a seismic isolation cavity 4-2. The seismic isolation bearing body 4-1 is generally made of materials with good elasticity and seismic isolation performance, such as rubber. During the manufacturing of the seismic isolation bearing body 4-1, the formulation and production process of the rubber material must be strictly controlled to ensure that its performance meets design requirements. The presence of the seismic isolation cavity 4-2 further enhances the flexibility and deformation capacity of the seismic isolation bearing body 4-1, enabling it to better perform its seismic isolation function under external forces such as earthquakes. When assembling the seismic isolation bearing body 4-1, it is essential to ensure a tight connection between it and the lower connecting plate 1 and the upper connecting plate 2 to prevent gaps and displacement. For example, the seismic isolation bearing body 4-1 is placed stably on the upper end of the lower connecting plate 1, and then vulcanized or fixed using a clamping device. The body 4-1 is firmly connected to the lower connecting plate 1, while ensuring that the upper connecting plate 2 can be accurately installed on the upper end face of the seismic isolation bearing body 4-1, and that the two have good contact. Several seismic isolation strips 4-3 are provided inside the seismic isolation cavity 4-2. These seismic isolation strips 4-3 are located on the upper and lower end faces inside the seismic isolation cavity 4-2. An internal rubber sheet 4-4 is provided inside the seismic isolation strip 4-3. The seismic isolation strip 4-3 is generally made of rubber or other materials with damping properties. Its function is to consume energy through its own deformation and friction during the propagation of seismic motion, thereby further reducing the impact of earthquakes on the superstructure. When assembling the seismic isolation strips 4-3, the number and arrangement of the seismic isolation strips 4-3 should be determined according to the design requirements to ensure that they can be evenly distributed in the seismic isolation cavity 4-2.
[0036] The upper connecting plate 2 is set on the upper end face of the seismic isolation bearing body 4-1 and matches the shape of the lower connecting plate 1. When assembling the upper connecting plate 2, its horizontality and fit with the seismic isolation bearing body 4-1 must be ensured. The upper end of the upper connecting plate 2 is provided with upper pre-embedded anchor bars 5, which are set at the four corners of the upper connecting plate 2. When installing the upper pre-embedded anchor bars 5, its verticality and connection with the upper connecting plate 2 must be ensured.
[0037] like Figures 1-4 As shown, this embodiment proposes that the locking sleeve 3-4 is provided with a replacement sleeve 3-7 inside, the replacement sleeve 3-7 is provided with a plug sleeve 3-8 inside, the plug sleeve 3-8 is provided with a locking ring 3-9 inside, and the locking ring 3-9 is threadedly connected to the locking bolt 3-3.
[0038] In some examples, the locking sleeve 3-4 has a replacement sleeve 3-7 inside, the replacement sleeve 3-7 has a plug sleeve 3-8 inside, and the plug sleeve 3-8 has a locking ring 3-9 that is threadedly connected to the locking bolt 3-3 inside. During installation, first screw the locking ring 3-9 into the locking bolt 3-3, then put the plug sleeve 3-8 onto the locking bolt 3-3 so that the locking ring 3-9 is inside the plug sleeve 3-8. Next, put the replacement sleeve 3-7 onto the plug sleeve 3-8, and finally install the locking sleeve 3-4 onto the replacement sleeve 3-7. During installation, pay attention to the fitting accuracy between the components to ensure a secure installation. For example, use a wrench to tighten the locking ring 3-9 onto the locking bolt 3-3 to ensure that its tightening torque meets the design requirements. Then install other components in sequence, and check the connection gaps and tightness between each component to ensure the reliability of the entire connection assembly.
[0039] For example, such as Figure 2 As shown, there is a number of isolation strips 4-3, and the isolation strips 4-3 are located on the upper and lower end faces inside the isolation cavity 4-2.
[0040] In some examples, in the design of seismic isolation bearings for high-rise buildings, based on seismic analysis results, a certain number of seismic isolation strips 4-3 are evenly arranged in the seismic isolation cavity 4-2, so that the seismic isolation strips 4-3 form a continuous seismic isolation system at both ends, effectively improving the seismic isolation effect of the seismic isolation bearing. During installation, the seismic isolation strips 4-3 are firmly vulcanized and pasted to the upper and lower ends of the seismic isolation cavity 4-2 using adhesive, ensuring a tight connection between the seismic isolation strips 4-3 and the seismic isolation bearing body 4-1, while ensuring that the internal rubber sheet 4-4 is accurately positioned inside the seismic isolation strip 4-3 and does not shift.
[0041] For example, such as Figure 1As shown, the upper connecting plate 2 is set on the upper end face of the seismic isolation bearing body 4-1. The shape of the upper connecting plate 2 matches that of the lower connecting plate 1. The upper end of the upper connecting plate 2 is provided with upper pre-embedded anchor bars 5. The upper pre-embedded anchor bars 5 are set at the four corners of the upper connecting plate 2. The positions of the upper pre-embedded anchor bars 5 and the lower pre-embedded anchor bars 3-6 correspond to each other.
[0042] In some examples, the lower embedded anchor bar 3-6 is located at the lower end of the reaction bearing plate 3-5. During installation, it is necessary to ensure that the lower embedded anchor bar 3-6 corresponds to the upper embedded anchor bar 5 to ensure a clear and stable force transmission path for the entire structure. This is achieved through precise measurement and positioning on the construction site, using measuring marks and control lines to ensure that the lower embedded anchor bar 3-6 and the upper embedded anchor bar 5 are accurately aligned in the vertical direction. For example, in bridge engineering, before installing the lower embedded anchor bar 3-6 and the upper embedded anchor bar 5, a total station is used to measure the installation positions of the lower embedded anchor bar 3-6 and the upper embedded anchor bar 5 on the pier and bridge deck respectively, and these positions are marked. Then, during installation, it is ensured that the positional deviation between the two is within the allowable range, thereby ensuring the safety and stability of the bridge structure during use.
[0043] For example, such as Figure 1 As shown, the mounting slot 3-1 has a circular structure, and the mounting plate 3-2 matches the structure of the mounting slot 3-1.
[0044] In some examples, the mounting slot 3-1 is a circular structure, and a mounting plate 3-2 that matches its structure is embedded inside. During the installation process, the dimensions of the mounting slot 3-1 and the mounting plate 3-2 must first be checked to ensure the fitting accuracy between the two. The mounting plate 3-2 is then slowly inserted into the mounting slot 3-1 to ensure that the mounting plate 3-2 can rotate freely in the mounting slot 3-1 without significant shaking.
[0045] For example, such as Figure 4 As shown, the inner wall of the locking sleeve 3-4 is provided with a positioning pin 6, and the outer wall of the insertion sleeve 3-8 is provided with a positioning block 7. The positioning block 7 and the positioning pin 6 are engaged.
[0046] In some examples, the inner wall of the locking sleeve 3-4 is provided with a positioning pin 6, and the outer wall of the plug sleeve 3-8 is provided with a positioning block 7. During installation, the positioning block 7 is engaged with the positioning pin 6 to ensure the accurate relative position between the components and to prevent loosening and displacement during use.
[0047] In use, the rubber seismic isolation bearing assembly 4 serves as the core load-bearing foundation. The upper connecting plate 2 at the top supports the vertical load of the superstructure. The load is transferred through the upper connecting plate 2 to the lower seismic isolation bearing body 4-1. The seismic isolation bearing body 4-1 acts as an intermediate carrier for force transmission, distributing the load evenly to the lower connecting plate 1. The load is then transferred to the lower structure through the replacement connecting assembly 3 at the bottom of the lower connecting plate 1. In the replacement connecting assembly 3, the mounting plate 3-2 is fixed to the lower connecting plate 1 by locking bolts 3-3. The locking sleeve 3-4, the reaction bearing plate 3-5, and the lower pre-embedded anchor bar 3-6 form a vertical force transmission path. The reaction bearing plate 3-5 can distribute the load during height adjustment or bearing replacement, avoiding local stress concentration. The concrete lower support pier serves as the final load-bearing fulcrum, transferring the overall load to the foundation or the lower load-bearing structure, ensuring a clear and stable load transmission path.
[0048] When an earthquake occurs, the rubber seismic isolation bearing assembly 4 offsets the impact of seismic forces through multi-layer elastic deformation and energy dissipation. First, the seismic isolation bearing body 4-1 utilizes the high elasticity of rubber material to absorb horizontal and vertical seismic energy through its own compression and shear deformation, reducing the transmission of seismic forces to the upper structure. The seismic isolation cavity 4-2 inside the seismic isolation bearing body 4-1 provides a larger deformation space for the seismic isolation bearing body 4-1, enhancing its flexible buffering capacity. Second, several seismic isolation strips 4-3 inside the seismic isolation cavity 4-2 further play an energy dissipation role: the seismic isolation strips 4-3 distributed on the upper and lower end faces dissipate seismic energy through mutual compression and friction deformation, and the internal rubber sheet 4-4 inside can absorb high-frequency vibrations through the material damping characteristics, forming a two-level seismic isolation system of "overall deformation of the seismic isolation bearing body 4-1 + local energy dissipation of the seismic isolation strips 4-3", which significantly reduces the impact of earthquakes on the upper structure.
[0049] The replacement connecting component 3 utilizes a modular design to enable rapid replacement of vulnerable parts and structural adaptation. The threaded connection between the locking bolt 3-3 and the locking ring 3-9 ensures the tightness between the mounting plate 3-2 and the lower connecting plate 1. The nested structure of the locking sleeve 3-4, the replacement sleeve 3-7, and the plug sleeve 3-8 facilitates component replacement: when the locking bolt 3-3 or the connecting component is worn, the plug sleeve 3-8 can be separated from the locking sleeve 3-4 by loosening the locking ring 3-9, and the damaged replacement sleeve 3-7 or plug sleeve 3-8 can be replaced individually without disassembling the entire support structure. In addition, the positioning pin 6 on the inner side of the locking sleeve 3-4 and the positioning block 7 on the outer side of the plug sleeve 3-8 mesh with each other to ensure the relative position accuracy of each component after replacement and maintain the stability of the force transmission path. The circular matching structure of the mounting groove 3-1 and the mounting plate 3-2 allows for a certain degree of fine-tuning to adapt to the leveling requirements of different installation scenarios.
[0050] The matching shape of the upper connecting plate 2 and the lower connecting plate 1 ensures the uniformity of load transfer and avoids local damage caused by uneven stress. The positional correspondence between the upper pre-embedded anchor bars 5 at the four corners and the lower pre-embedded anchor bars 3-6 at the bottom can form a symmetrical force structure under horizontal seismic action, enhancing the overall anti-overturning capacity. The upper connecting plate 2 with pressure sensor monitors load data in real time. When the load exceeds the design threshold, the early warning system can promptly report the structural safety status. Combined with the deformation limiting capability of the seismic isolation components, the stability and safety of the superstructure under earthquake, heavy load and other working conditions are jointly guaranteed.
[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.
Claims
1. A rubber seismic isolation bearing, characterized by, include: The lower connecting plate (1) has an upper connecting plate (2) at its upper end; Replace the connecting component (3), which is located at the bottom of the lower connecting plate (1); The replacement connecting component (3) includes a mounting groove (3-1), in which an installation plate (3-2) is embedded. A locking bolt (3-3) is provided on the installation plate (3-2). The lower end of the locking bolt (3-3) is placed on the lower end of the lower connecting plate (1). A locking sleeve (3-4) is provided on the locking bolt (3-3). A reaction force bearing plate (3-5) is provided at the lower end of the locking sleeve (3-4). A lower pre-embedded anchor bar (3-6) is provided at the lower end of the reaction force bearing plate (3-5). The rubber seismic isolation bearing assembly (4) includes a seismic isolation bearing body (4-1), an isolation cavity (4-2) is provided inside the seismic isolation bearing body (4-1), an isolation strip (4-3) is provided inside the isolation cavity (4-2), and an inner rubber sheet (4-4) is provided inside the isolation strip (4-3).
2. The rubber seismic isolation bearing according to claim 1, wherein The locking sleeve (3-4) has a replacement sleeve (3-7) inside, the replacement sleeve (3-7) has a plug sleeve (3-8) inside, the plug sleeve (3-8) has a locking ring (3-9) inside, and the locking ring (3-9) is threadedly connected to the locking bolt (3-3).
3. The rubber seismic isolation bearing according to claim 1, wherein The number of the vibration isolation strips (4-3) is several, and several of the vibration isolation strips (4-3) are located on the upper and lower end faces inside the vibration isolation cavity (4-2).
4. The rubber seismic isolation bearing of claim 1, wherein The upper connecting plate (2) is disposed on the upper end surface of the seismic isolation bearing body (4-1), and the shape of the upper connecting plate (2) matches that of the lower connecting plate (1).
5. The rubber seismic isolation bearing of claim 1, wherein The upper end of the upper connecting plate (2) is provided with an upper pre-embedded anchor bar (5), which is located at the four corners of the upper connecting plate (2). The upper pre-embedded anchor bar (5) corresponds to the position of the lower pre-embedded anchor bar (3-6).
6. The rubber seismic isolation bearing of claim 1, wherein The mounting groove (3-1) has a circular structure, and the mounting plate (3-2) matches the structure of the mounting groove (3-1).
7. The rubber seismic isolation bearing according to claim 2, wherein The inner wall of the locking sleeve (3-4) is provided with a positioning pin (6), and the outer wall of the insertion sleeve (3-8) is provided with a positioning block (7). The positioning block (7) and the positioning pin (6) are engaged.