Vibration double-control shock insulation rubber support capable of adjusting quasi-constant frequency

Abstract

The invention provides an adjustable quasi-constant frequency vibration double-control shock insulation rubber support, and relates to the technical field of building shock insulation devices, the adjustable quasi-constant frequency vibration double-control shock insulation rubber support comprises a lower connecting plate, and a shock insulation mechanism is arranged above the lower connecting plate; the shock isolation mechanism comprises a fixing rod, the bottom end of the fixing rod is fixedly connected with the top end of the lower connecting plate, the outer surface of the fixing rod is slidably connected with a limiting plate, and a plurality of steel plate cushion layers arranged at equal intervals are arranged on the outer surface of the fixing rod. According to the vibration and vibration double-control shock insulation rubber support with the adjustable quasi-constant frequency, through the double adjustment design of the adjusting assembly, it is ensured that the optimal shock insulation effect can be maintained under various working conditions, the damage risk caused by resonance of the structure is remarkably reduced, the synergistic effect of the shock insulation mechanism is combined, double control over vibration and vibration is achieved, and the service life of the vibration and vibration double-control shock insulation rubber support is prolonged. The multiple steel plate cushion layers and the multiple rubber cushion layers in the shock insulation mechanism are alternately stacked, the vibration amplitude and the vibration duration of the structure are effectively restrained, and the stability and the reliability of the support in the using process are greatly improved.

Description

Technical Field

[0001] This invention relates to a vibration-controlled dual-frequency vibration isolation rubber bearing, specifically an adjustable quasi-constant frequency vibration-controlled dual-frequency vibration isolation rubber bearing, belonging to the technical field of building seismic isolation devices. Background Technology

[0002] Seismic isolation rubber bearings are commonly used seismic isolation components in engineering structures such as buildings and bridges. They absorb seismic energy through the elastic deformation of the rubber pad, reducing the vibration response of the structure and thus protecting the safety of the main structure.

[0003] Existing seismic isolation rubber bearings have a fixed natural frequency in practical use. When the load on the building structure changes, or when it encounters seismic waves of different intensities and frequencies, the fixed-frequency bearings cannot maintain the best seismic isolation effect. They may even exacerbate structural damage due to resonance effects. Furthermore, their dual control effect on vibration and seismic activity is poor, reducing stability under strong earthquakes or complex vibration conditions. Therefore, this paper proposes a seismic isolation rubber bearing with adjustable quasi-constant frequency and dual control of vibration and seismic activity. Summary of the Invention

[0004] This invention proposes an adjustable quasi-constant frequency vibration-vibration dual-control seismic isolation rubber bearing to solve the problems of fixed natural frequency and poor dual control effect of vibration and vibration in the prior art.

[0005] This invention is achieved through the following technical solution: an adjustable quasi-constant frequency vibration-controlled dual-control vibration isolation rubber bearing, comprising a lower connecting plate, with a vibration isolation mechanism disposed above the lower connecting plate; the vibration isolation mechanism comprises a fixed rod, the bottom end of which is fixedly connected to the top end of the lower connecting plate, a limit plate slidably connected to the outer surface of the fixed rod, and multiple steel plate pads arranged at equal intervals on the fixed rod below the limit plate, each steel plate pad having a rubber pad on its upper surface, multiple transmission rods arranged at equal intervals fixedly connected to the top end of the limit plate, an auxiliary plate fixedly connected to the top end of the multiple transmission rods, two auxiliary blocks fixedly connected to the top end of the auxiliary plate, a connecting column slidably connected inside each auxiliary block, and an upper connecting plate fixedly connected to the top end of the two connecting columns.

[0006] An adjustment component is provided on the fixed rod, which has an external thread. The adjustment component includes two hexagonal nuts threaded onto the fixed rod. A buffer pad is fixedly connected to the bottom end of the lower hexagonal nut, and the bottom end of the buffer pad contacts the top end of the limiting plate.

[0007] Each auxiliary block has a slidingly connected compression plate inside. A spring damper is fixedly connected to the top of each compression plate, and the top of each spring damper is fixedly connected to the bottom of a connecting column. An adjusting bolt is rotatably connected to the bottom of each compression plate, and each adjusting bolt is threadedly connected to the auxiliary block. Each transmission rod has a fixed retaining ring on its outer surface, and the bottom end of each retaining ring is fixedly connected to the top end of the limiting plate.

[0008] Each connecting post is fixedly connected to a reinforcing ring at its upper end, and the top of each reinforcing ring is fixedly connected to the bottom of the upper connecting plate.

[0009] The lower connecting plate has multiple first fixing holes arranged at equal intervals in a circumferential direction, and the upper connecting plate has multiple second fixing holes arranged at equal intervals in a circumferential direction.

[0010] A guide post is fixedly connected to the top of the fixed rod, and the guide post is slidably connected to the inside of the auxiliary plate.

[0011] This invention provides an adjustable quasi-constant frequency vibration-controlled dual-control seismic isolation rubber bearing, which has the following beneficial effects: This adjustable quasi-constant frequency vibration-controlled dual-control seismic isolation rubber bearing solves the core problem of fixed natural frequency in traditional seismic isolation rubber bearings through the dual adjustment design of the adjustment components. When the load on the building structure changes or encounters seismic waves of different intensities and frequencies, the stiffness characteristics of the bearing can be changed by adjusting the hexagonal nuts and adjusting bolts, so that the natural frequency of the bearing always maintains a reasonable difference with the external vibration frequency, avoiding resonance effects and ensuring that the best seismic isolation effect can be maintained under various working conditions. It significantly reduces the risk of structural damage caused by resonance. Combined with the synergistic effect of the seismic isolation mechanism, it achieves dual control of vibration and shock. In the seismic isolation mechanism, multiple layers of steel plate pads and rubber pads are alternately stacked. The elastic deformation of the rubber pads absorbs seismic energy, while the steel plate pads enhance the overall load-bearing capacity and lateral stiffness of the bearing. The spring damper in the adjustment components further consumes vibration energy. At the same time, the damping characteristics are optimized by adjusting bolts. Under strong earthquakes or complex vibration conditions, it effectively suppresses the vibration amplitude and duration of the structure, greatly improving the stability and reliability of the bearing during use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the limiting plate of the present invention; Figure 3 This is a schematic cross-sectional view of the auxiliary plate structure of the present invention; Figure 4 This is a schematic cross-sectional view of the auxiliary block structure of the present invention.

[0013] Explanation of reference numerals in the attached figures 1. Lower connecting plate; 2. Vibration isolation mechanism; 201. Fixing rod; 202. Limiting plate; 203. Rubber pad; 204. Steel plate pad; 205. Transmission rod; 206. Auxiliary plate; 207. Auxiliary block; 208. Connecting column; 209. Upper connecting plate; 3. Adjusting components; 301. External thread; 302. Hex nut; 303. Buffer pad; 304. Press plate; 305. Spring damper; 306. Adjusting bolt; 4. Reinforcing ring; 5. First fixing hole; 6. Second fixing hole; 7. Guide post; 8. Secure ring. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0015] Please see Figures 1-4 This invention provides an adjustable quasi-constant frequency vibration-controlled dual-control vibration isolation rubber bearing, including a lower connecting plate 1, and a vibration isolation mechanism 2 is provided above the lower connecting plate 1; The vibration isolation mechanism 2 includes a fixed rod 201, the bottom end of which is fixedly connected to the top end of the lower connecting plate 1. A limit plate 202 is slidably connected to the outer surface of the fixed rod 201. Multiple steel plate pads 204 are arranged at equal intervals on the outer surface of the fixed rod 201. The steel plate pads 204 are located below the limit plate. A rubber pad 203 is provided on the upper surface of each steel plate pad 204. Multiple transmission rods 205 are fixedly connected to the top end of the limit plate 202. An auxiliary plate 206 is fixedly connected to the top end of the multiple transmission rods 205. A retaining ring 8 is fixedly connected to the lower end of each transmission rod 205. The bottom end of the retaining ring 8 is fixedly connected to the top end of the limit plate 202. The retaining ring 8 increases the contact area between the transmission rod 205 and the limit plate 202, disperses local stress, and prevents the transmission rod 205 from breaking or loosening at the root due to long-term stress. This ensures that the force transmission path of the vibration isolation mechanism 2 is stable and reliable, and avoids affecting the vibration isolation effect due to transmission failure.

[0016] Two auxiliary blocks 207 are fixedly connected to the top of the auxiliary plate 206. Each auxiliary block 207 has a connecting column 208 slidably connected inside. Each connecting column 208 has a reinforcing ring 4 fixedly connected to its top. The top of each reinforcing ring 4 is fixedly connected to the bottom of the upper connecting plate 209. The upper connecting plate 209 bears the load of the upper building structure and transfers the load to the auxiliary blocks 207 and spring dampers 305 through the connecting columns 208. The reinforcing rings 4 can effectively disperse the concentrated stress at the top of the connecting columns 208, prevent the connection between the upper connecting plate 209 and the connecting columns 208 from cracking or deforming due to excessive load, and prevent the connecting columns 208 from shifting during horizontal vibration, ensuring the accuracy of vertical load transfer and the smoothness of horizontal seismic isolation.

[0017] The tops of the two connecting columns 208 are jointly fixedly connected to an upper connecting plate 209. The lower connecting plate 1 has multiple first fixing holes 5 at equal intervals in a circumferential direction, and the upper connecting plate 209 has multiple second fixing holes 6 at equal intervals in a circumferential direction. This enables convenient and secure connection between the support and the foundation structure and the superstructure. During installation, the lower connecting plate 1 can be fixed to the building foundation or bridge pier by bolts passing through the first fixing holes 5, and the upper connecting plate 209 can be fixed to the upper beam or the main building structure by bolts passing through the second fixing holes 6. The equidistant arrangement design allows it to adapt to different sizes of mounting surfaces and bolt spacing, improving the versatility of the support. At the same time, the distribution of multiple fixing holes allows the load to be evenly distributed to the entire support, avoiding damage to the installation parts caused by excessive local stress and ensuring the overall stability of the support after installation.

[0018] A guide column 7 is fixedly connected to the top of the fixed rod 201. The guide column 7 is slidably connected inside the auxiliary plate 206, providing precise guidance and limiting for the movement of the auxiliary plate 206. During seismic vibration or structural deformation, the auxiliary plate 206 will displace in the vertical or horizontal direction. The guide column 7 can limit the horizontal offset range of the auxiliary plate 206, preventing it from tilting, getting stuck or detaching from the fixed rod 201 due to excessive vibration. This ensures that the movement trajectory of components such as the transmission rod 205 and the limiting plate 202 meets the design requirements, guarantees the normal functioning of the seismic isolation mechanism 2 and the adjustment assembly 3, and reduces collision and wear between components, extending the service life of the support.

[0019] An adjusting component 3 is provided on the fixed rod 201. The fixed rod 201 has an external thread 301. The adjusting component 3 includes two hexagonal nuts 302 threadedly connected to the fixed rod 201. A buffer pad 303 is fixedly connected to the bottom end of one of the hexagonal nuts 302. The bottom end of the buffer pad 303 contacts the top end of the limiting plate 202. A compression plate 304 is slidably connected inside each auxiliary block 207. A spring damper 305 is fixedly connected to the top end of each compression plate 304. The top end of each spring damper 305 is fixedly connected to the bottom end of the connecting column 208. Each compression plate 304 has an adjusting bolt 306 rotatably connected to its bottom end. Each adjusting bolt 306 is threadedly connected to the auxiliary block 207. The external thread 301 is fixed to the outer surface of the fixing rod 201, providing a threaded connection base for the hexagonal nut 302. By rotating the two hexagonal nuts 302, their position can be adjusted axially along the fixing rod 201. The lower hexagonal nut 302 compresses the limiting plate 202 through the buffer pad 303, thereby compressing the steel plate pad 204 and the rubber pad 203, changing the pre-compression of the rubber pad 203, and thus adjusting the vertical stiffness of the support. The upper hexagonal nut 302... Nut 302 serves a locking and positioning function, preventing the lower hexagonal nut 302 from loosening during vibration and ensuring stable stiffness parameters after adjustment. Buffer pad 303 is located between the hexagonal nut 302 and the limiting plate 202. On one hand, it avoids direct rigid contact between the hexagonal nut 302 and the limiting plate 202, reducing wear on the limiting plate 202 during adjustment. On the other hand, it utilizes its own elasticity to buffer the impact force between the hexagonal nut 302 and the limiting plate 202 during vibration, reducing component fatigue damage and enhancing the buffering performance of the adjusting assembly 3. The pressing plate 304 is slidably connected to the auxiliary block. Inside 207, the spring damper 305 serves as the mounting carrier and force transmission medium for the spring damper 305. The spring damper 305 connects the compression plate 304 and the connecting column 208, using damping to consume vibration energy, achieving secondary vibration isolation, and improving the dual control effect of vibration and shock. The adjusting bolt 306 is threadedly connected to the auxiliary block 207. Rotating the adjusting bolt 306 can push the compression plate 304 to move axially along the auxiliary block 207, changing the pre-compression of the spring damper 305, thereby adjusting the damping coefficient and horizontal stiffness of the support. This complements the adjustment of the hexagonal nut 302, achieving precise fine-tuning of the support frequency.

[0020] In use, the bottom of the support is fixed to the building foundation, bridge pier, or other load-bearing structure by bolts through the first fixing hole 5 of the lower connecting plate 1. The top of the support is fixedly connected to the upper building body, bridge beam, or other structure through the second fixing hole 6 of the upper connecting plate 209. At this time, the reinforcing ring 4 strengthens the connection between the connecting column 208 and the upper connecting plate 209, and the securing ring 8 ensures the stable connection between the transmission rod 205 and the limiting plate 202. The guide column 7 is inserted into the auxiliary plate 206 to complete the overall installation and positioning, ensuring that the support is firmly connected to the upper and lower structures and that the load transfer path is clear.

[0021] The vertical stiffness is adjusted by rotating the two hexagonal nuts 302 on the outer surface of the fixing rod 201 according to the design load and expected seismic frequency of the building structure. The lower hexagonal nut 302 presses down on the limiting plate 202 through the buffer pad 303. The limiting plate 202 slides down along the fixing rod 201, thereby compressing the multi-layer rubber pad 203 and steel plate pad 204 below it. The pre-compression of the rubber pad 203 increases, the vertical stiffness of the support increases, and the natural frequency increases accordingly. Conversely, rotating the lower hexagonal nut 302 upwards reduces the pre-compression of the rubber pad 203, reduces the vertical stiffness, and reduces the natural frequency. After adjustment, the upper hexagonal nut 302 is rotated to make it fit tightly against the lower hexagonal nut 302 to achieve locking and positioning, preventing the adjustment parameters from shifting during vibration.

[0022] Damping and stiffness are optimized by adjusting bolt 306. The adjusting bolt 306 at the bottom of the rotating auxiliary block 207 is threadedly connected to the auxiliary block 207, and its rotational motion is converted into the vertical displacement of the pressing plate 304. When the pressing plate 304 moves upward, it compresses the spring damper 305, increasing the preload of the spring damper 305 and improving the horizontal stiffness and damping coefficient of the support. This allows for further fine-tuning of the support's natural frequency and enhances its ability to suppress horizontal vibrations. When the pressing plate 304 moves downward, the preload of the spring damper 305 decreases, reducing the horizontal stiffness and damping coefficient, and the natural frequency is adjusted accordingly. By combining coarse and fine adjustments, the support frequency reaches a quasi-constant state that is compatible with external working conditions.

[0023] When an earthquake or external vibration occurs, the vibration of the superstructure is transmitted to the connecting column 208 through the upper connecting plate 209. The connecting column 208 then transmits the vibration load to the spring damper 305 within the auxiliary block 207. The spring damper 305 absorbs and dissipates some of the vibration energy through elastic deformation and damping, reducing the vibration amplitude. Simultaneously, the auxiliary block 207 transmits the remaining load to the limiting plate 202 through the auxiliary plate 206 and the transmission rod 205. The limiting plate 202 evenly transmits the load to the multiple layers of rubber pads 203 and steel plate pads 204 below. The rubber pads 203 undergo elastic deformation to further absorb earthquake energy, while the steel plate pads 204 restrict the rubber pads. The excessive deformation of 203 enhances the support's resistance to lateral displacement and load-bearing stability, preventing the support from failing due to excessive deformation. During vibration transmission, the guide column 7 restricts the horizontal displacement of the auxiliary plate 206, preventing it from tilting or getting stuck, ensuring smooth movement of all components. The spring damper 305 continuously plays a damping role, converting vibration energy into heat energy for consumption and suppressing the continuous propagation of vibration. The buffer pad 303 reduces the rigid impact between the hexagonal nut 302 and the limiting plate 202, buffering the impact of vibration load on the adjustment component 3. Through multiple functions of absorption, dissipation, and limiting, dual control of vibration and shock is achieved, effectively reducing the vibration response of the upper structure and protecting the safety of the main structure.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable quasi-constant frequency vibration-controlled dual-control seismic isolation rubber bearing, comprising a lower connecting plate (1), characterized in that: A vibration isolation mechanism (2) is provided above the lower connecting plate (1); the vibration isolation mechanism (2) includes a fixed rod (201), the bottom end of the fixed rod (201) is fixedly connected to the top end of the lower connecting plate (1), the outer surface of the fixed rod (201) is slidably connected to a limit plate (202), and a number of steel plate pads (204) arranged at equal intervals are provided on the fixed rod (201) below the limit plate (202), and a rubber pad (203) is provided on the upper surface of each steel plate pad (204). A number of transmission rods (205) arranged at equal intervals are fixedly connected to the top end of the limit plate (202), and an auxiliary plate (206) is fixedly connected to the top end of the multiple transmission rods (205). Two auxiliary blocks (207) are fixedly connected to the top end of the auxiliary plate (206), and a connecting column (208) is slidably connected inside each auxiliary block (207). The top end of the two connecting columns (208) is fixedly connected to the upper connecting plate (209).

2. The adjustable quasi-constant frequency vibration-controlled dual-control seismic isolation rubber bearing according to claim 1, characterized in that: An adjustment component (3) is provided on the fixed rod (201). An external thread (301) is provided on the fixed rod (201). The adjustment component (3) includes two hexagonal nuts (302) threaded to the fixed rod (201). A buffer pad (303) is fixedly connected to the bottom end of the hexagonal nut (302) located on the lower side. The bottom end of the buffer pad (303) is in contact with the top end of the limiting plate (202).

3. The adjustable quasi-constant frequency vibration-controlled dual-control seismic isolation rubber bearing according to claim 1, characterized in that: Each auxiliary block (207) has a slidably connected extrusion plate (304) inside. Each extrusion plate (304) has a fixedly connected spring damper (305) at its top. Each spring damper (305) has its top fixedly connected to the bottom of the connecting column (208). Each extrusion plate (304) has an adjusting bolt (306) rotatably connected to its bottom. Each adjusting bolt (306) is threadedly connected to the auxiliary block (207).

4. The adjustable quasi-constant frequency vibration-controlled dual-control seismic isolation rubber bearing according to claim 1, characterized in that: The lower connecting plate (1) has multiple first fixing holes (5) arranged at equal intervals in the circumferential direction, and the upper connecting plate (209) has multiple second fixing holes (6) arranged at equal intervals in the circumferential direction.

5. The adjustable quasi-constant frequency vibration-controlled dual-control seismic isolation rubber bearing according to claim 1, characterized in that: The top of the fixed rod (201) is fixedly connected to a guide post (7), which is slidably connected to the inside of the auxiliary plate (206).

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