Vibration isolation bracket with adjustable stiffness and its mounting method

Abstract

The present invention provides a vibration isolation bracket with adjustable stiffness and a method for installing the same. The support bracket includes a fixed pedestal and a slide pedestal located outside the fixed pedestal. Inside the slide pedestal, a slider slidably connected is provided. An elastic arm is provided between the fixed pedestal and the slide pedestal. Both ends of the elastic arm are slidably attached to the concave cylindrical surfaces of the fixed pedestal and the slider respectively. The slide pedestal and the fixed pedestal provided along the same axial direction are connected via a temporary clamping force reaction device. The present invention enables flexible arrangement, and the deformation and dynamic stiffness can be adjusted throughout the entire process of structure construction and operation, eliminating the deformation error caused by design and construction, and ensuring the vibration isolation function, safety, and feasibility of the entire structure.

Description

Technical Field

[0001] The present invention relates to the field of earthquake mitigation and disaster prevention in civil engineering, and particularly to a vibration isolation bracket with adjustable stiffness and a method for installing the same.

Background Art

[0002] China is the country with the most extensive operation and construction of railway transportation. The total operating mileage of urban railways exceeds the sum of other countries. Many buildings in cities are developed along or near railway lines and are threatened by traffic environmental vibrations, which have a profound impact on building functions and urban living environments. Therefore, it is urgent to solve this problem by vibration isolation (earthquake protection) technology. At the same time, about 85.7% of large and medium-sized cities in China are located in earthquake-prone areas. According to the "Regulations on the Seismic Management of Construction Projects" (Decree No. 744 of the State Council) promulgated by the State Council in 2021, "Newly constructed schools, kindergartens, hospitals, nursing homes, children's welfare facilities, emergency command centers, emergency shelters, and broadcasting stations in high-seismicity fortification areas and important earthquake monitoring and defense areas shall adopt technologies such as earthquake shock absorption in accordance with relevant national regulations, and it is necessary to ensure that normal usage requirements are met in this area in the event of an earthquake." Therefore, the popularization and application of vibration isolation (earthquake protection) technology have become one of the mainstream technologies for earthquake prevention and disaster reduction in China.

[0003] Against the backdrop of the above-mentioned demands, the number of vibration isolation (earthquake protection) projects for large-scale buildings, large structures, long bridges, heavy-tonnage equipment and instruments, etc. has increased, and the requirements for vibration isolation (earthquake protection) bracket products are becoming increasingly high. In order to ensure the constructability of the project and the safety of the brackets, it is required that the brackets have little deformation when bearing the gravity load of the superstructure. Also, in order to ensure a three-dimensional vibration isolation (earthquake protection) effect, it is required that the brackets have low stiffness against multi-directional environmental vibrations and seismic actions.

[0004] However, currently mature anti-vibration (seismic) bracket products still cannot meet the above requirements, and the main problems are as follows. Currently, anti-vibration (seismic) bracket products have limitations in structural shape and material properties. The vertical stiffness is mainly linear or hard spring characteristics, and there is no adjustment function after being attached to the structure. Therefore, when applied to low-frequency anti-vibration (seismic) engineering design, the vertical deformation of the bracket is too large, and problems that are uncontrollable in terms of construction accuracy and structural safety are likely to occur. However, if the stiffness is increased to reduce the deformation, the low-frequency anti-vibration (seismic) function will be lost, and the engineering requirements cannot be satisfied.

Summary of the Invention

[0005] The object of the present invention is to provide an anti-vibration bracket with adjustable stiffness and its installation method, which has high stiffness and little deformation when bearing the initial gravity static load of the upper structure, has low stiffness and high anti-vibration efficiency for vertical vibration after bearing the initial load, and realizes an anti-vibration bracket whose deformation and dynamic stiffness can be adjusted throughout the entire process of structure construction and operation.

[0006] The present invention provides an anti-vibration bracket with adjustable stiffness, including a fixed pedestal and a slide pedestal located outside the fixed pedestal. Inside the slide pedestal, a slider slidably connected is provided. An elastic arm is provided between the fixed pedestal and the slide pedestal. Both ends of the elastic arm are slidably attached to the concave cylindrical surfaces of the fixed pedestal and the slider respectively. The slide pedestal and the fixed pedestal provided along the same axial direction are connected via a temporary clamping force reaction device.

[0007] Furthermore, the fixed pedestal is attached between the upper structure assembly and the lower structure assembly. The fixed pedestal and the upper structure assembly are removably connected. The fixed pedestal and the lower structure assembly are connected via the bracket body.

[0008] Furthermore, the slide pedestal includes a guide cylinder and the slider slidably attached inside the guide cylinder. A base attached to the lower structure assembly is provided between the slide pedestal and the lower structure assembly, and the slide pedestal and the base are connected via a height adjustment member.

[0009] Furthermore, the height adjustment member includes a screw passing through the guide cylinder and the base, and two nuts located on both the upper and lower sides of the top connection plate of the base and two nuts located on both the upper and lower sides of the bottom connection plate of the guide cylinder are both screwed onto the screw.

[0010] Furthermore, the elastic arm is formed by stacking one or more leaf springs and connecting them with a hoop. Tip sleeves are covered at both ends of the leaf spring, and the tip sleeves are slidably connected to the concave cylindrical surface of the slider or the fixed pedestal.

[0011] Furthermore, the temporary clamping force reaction device includes a cable passing through the slider and the fixed pedestal provided along the same axis. An anchor removably attached to the cable is provided on one side of the slider away from the fixed pedestal.

[0012] Furthermore, a lateral connection spring is provided between the two elastic arms located on the same side of the fixed pedestal.

[0013] Furthermore, an end plate is provided at a position inside the guide cylinder away from the fixed pedestal. A screw hole is opened in the end plate. The temporary clamping force reaction device includes a push rod screwed into the screw hole. One end of the push rod close to the fixed pedestal is slidably connected to the outer surface of the slider.

[0014] The present invention further provides a method for attaching a vibration isolation bracket with adjustable stiffness, and the method includes: Step 1 of attaching the fixed pedestal and the bracket body above the constructed lower structure assembly; Step 2 of using the fixed pedestal and the bracket body as part of the support structure, continuously constructing the upper structure assembly, and at the same time, parallelly installing the subsequent slide pedestal, elastic arm, and temporary clamping force reaction device; Attach the base to the lower structure assembly, connect the slide pedestal and the base via a height adjustment member, adjust the two nuts located on the upper and lower sides of the bottom connection plate of the guide cylinder so that the axes of the pair of guide cylinders arranged point-symmetrically with respect to the bracket body on the horizontal projection plane are horizontal and at the same elevation, and realize the adjustment of the horizontality and elevation of the guide cylinder; Push the sliders into the symmetrically arranged guide cylinders respectively, pass the cable through one anchor, one symmetrically arranged slider, the cable through-hole of the fixed pedestal, the other symmetrically arranged slider, and the other anchor in sequence, or screw the push rod into the end plate; Keep the anchors at the cable ends in a loose state, insert both ends of the elastic arm into the concave cylindrical surfaces of the slider and the fixed pedestal located on the same side respectively, fit the convex cylindrical surfaces of the tip sleeves at both ends into the two concave cylindrical surfaces respectively, and install the elastic arm into the concave cylindrical surfaces of the slider and the fixed pedestal on the other side of the fixed pedestal in the same way so that the pair of elastic arms overlap axially and are arranged point-symmetrically with respect to the bracket body on the horizontal projection plane; In order to restrain the elastic arms between the sliders and the fixed pedestal respectively, turn the anchors at both ends of the cable in the direction close to the slider, tighten the anchors at both ends of the cable, the slider, the elastic arm, and the fixed pedestal in sequence, or screw the push rod into the end plate, and then tighten the slider, the elastic arm, and the fixed pedestal; During the construction process of the upper structure assembly, monitor the settlement of the fixed pedestal and the inclination of the elastic arm due to the compression deformation of the bracket body. After completing the topmost part of the upper structure assembly and confirming that the compression deformation of the bracket body is stable, adjust the elevation of the slide pedestal again by the height adjustment member so that the pair of symmetrically arranged elastic arms return to the horizontal state and are at the same elevation; Attach a tension jack to one end of the cable. The reaction end of the tension jack tightens the slider, uses the tension jack to pull the cable, and utilizes the pushing action of the jack on the slider during the pulling process to slide the sliders at both ends towards each other, compress the elastic arms, and the compression of the elastic arms increases the bending deformation of the leaf spring. After applying a load to the jack until a predetermined value of the tensile force is reached, fix the anchor at the pulling end again, remove the jack, and form a temporary tightening on the elastic arms, then the construction is completed. Or use a screw torque applying tool, continuously screw the push rods at both ends into the end plates respectively, utilize the pushing action of the push rods on the sliders to slide the sliders at both ends towards each other, compress the elastic arms, and after applying a load to the screw torque applying tool until a predetermined value of the torque is reached, tighten the nuts located on both sides of the end plate on the push rod to form a tightening on the elastic arms, and then step 8 where the construction is completed is included.

[0015] Furthermore, in step 5, a lateral connecting spring is attached between the two elastic arms located on the same side of the fixed pedestal.

[0016] The present invention can be flexibly arranged, and the detachment operation is easy. During the entire process of the construction and operation of the structure, the deformation and dynamic stiffness can be adjusted. By adjusting the magnitude of the temporary tightening force, the longitudinal dynamic stiffness of the bracket under the up-and-down balance state can be adjusted, thereby eliminating the deformation error caused by design and construction, and ensuring the anti-vibration function, safety, and feasibility of the entire structure.

[0017] To more clearly explain the specific embodiments of the present invention or the technical solutions of the prior art, the following briefly introduces the drawings necessary for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative labor.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0019] Hereinafter, with reference to the examples, the technical solution in the present invention will be clearly and completely described. Obviously, the described examples are only some examples and not all of the present invention. Based on the examples in the present invention, all other examples obtained by those skilled in the art without creative work belong to the protection scope of the present invention.

[0020] In the description of the present invention, for the sake of understanding, the orientation or positional relationship indicated by terms such as "center", "longitudinal direction", "lateral direction", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only used for explaining the present invention and simplifying the description, and does not indicate or imply that the device or element mentioned must have a specific orientation and be constructed and operated in a specific direction. Therefore, they should not be construed as limitations to the present invention.

[0021] Also, the terms "first" and "second" are used for the sole purpose of description and should not be construed as indicating relative importance or implying or indicating the quantity of technical features. Therefore, the features separated by "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, unless otherwise specified, the meaning of "plural" refers to two or more. Also, the terms "attach", "connect", and "couple" need to be understood in a broad sense. For example, "connect" can be a fixed connection, a removable connection, or an integral connection, can be a mechanical connection or an electrical connection, can be a direct connection or an indirect connection via an intermediate medium, and can be a communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present invention in a specific situation.

Embodiment

[0022] As shown in FIGS. 1 and 2, The vibration isolation bracket with adjustable stiffness includes a fixed pedestal 11 and slide pedestals located on both the left and right sides of the fixed pedestal 11. Concave cylindrical surfaces are provided on the two left and right side surfaces of the fixed pedestal 11. The two slide pedestals and the fixed pedestal 11 are provided along the same axis and have the same elevation.

[0023] The fixed pedestal 11 is attached between the upper structure assembly 51 and the lower structure assembly 52. The fixed pedestal 11 and the upper structure assembly 51 are removably connected, and the fixed pedestal 11 and the lower structure assembly are connected via the bracket body 12.

[0024] The bracket body 12 uses a spring-type vibration isolation bracket, a thick rubber-type vibration isolation bracket, or other general-purpose vibration isolation brackets.

[0025] The slide pedestal includes a guide cylinder 21 and a slider 22 attached inside the guide cylinder 21. A concave cylindrical surface is also provided on the surface of the slider 22 close to the fixed pedestal 11.

[0026] The guide cylinder 21 is a hollow cylinder with a constant cross-section, and the slider 22 has a constant cross-sectional shape. The shape of the outer circle of its cross-section fits the shape of the inner circle of the cross-section of the guide cylinder 21. The slider 22 is placed inside the guide cylinder 21, and its axial direction coincides with the axial direction of the guide cylinder 21. Its side surface fits the inner surface of the guide cylinder 21. To enable the slider 22 to slide relatively along the axial direction of the guide cylinder 21, the gap of the fitting surface is filled with a slide material or not filled.

[0027] Alternatively, the guide cylinder 21 can be semi-closed cylindrical or plate-shaped, and a slide guide rail for frictionally contacting the slider 22 can be added thereon.

[0028] An elastic arm 31 is provided between the fixed pedestal 11 and the slide pedestal. The elastic arm 31 is formed by stacking one or more leaf springs 33 with an initial curvature and connecting them with a hoop 34. The two ends of the leaf spring 33 are covered with tip sleeves 32. The tip sleeves 32 at both ends of the elastic arm 31 are slidably mounted inside the concave cylindrical surfaces of the fixed pedestal 11 and the slider 22 respectively, and the tip sleeves 32 are slidably connected to the concave cylindrical surfaces of the slider 22 or the fixed pedestal 11.

[0029] The tip sleeve 32 may not be provided at the end of the leaf spring 33. It is only necessary to process the end of the leaf spring 33 into the shape of a convex cylindrical surface and make the generatrix direction of the convex cylindrical surface coincide with the generatrix direction of the concave cylindrical surface of the slider 22.

[0030] A transverse connection spring 35 is provided between the two elastic arms 31 located on the same side of the fixed pedestal 11.

[0031] As the elastic arm 31, in addition to the combination of the above-mentioned leaf springs 33, one or more parallel-connected coil springs, stacked rubber springs or stacked disc-shaped springs can also be used.

[0032] A base 24 attached to the lower structure assembly is provided between the guide cylinder 21 and the lower structure assembly. The guide cylinder 21 and the base 24 are connected via a height adjustment member 23. A double beam may be provided between the plurality of bases 24.

[0033] The height adjustment member 23 includes a screw that penetrates the guide cylinder 21 and the base 24. A circular hole is opened in the bottom connection plate of the guide cylinder 21, and a connecting circular hole corresponding to the circular hole is also opened in the top connection plate of the base 24. Two nuts are provided on each of the upper and lower sides of the circular hole in the top connection plate of the base 24, and two nuts are also provided on each of the upper and lower sides of the circular hole in the bottom connection plate of the guide cylinder 21. The screw penetrates the two circular holes, and the four nuts are screwed onto the screw. Gaskets or spacers may be provided at the contact positions between the four nuts and the connection plates.

[0034] After the screw is installed, the two nuts located on the upper and lower sides of the top connection plate of the base 24 are turned and tightened in the direction of the top connection plate of the base 24, and the two nuts located on the upper and lower sides of the bottom connection plate of the guide cylinder 21 are turned and tightened in the direction close to the bottom connection plate of the guide cylinder 21, realizing the adjustment of the height of each nut and thus the adjustment of the height and inclination of the upper guide cylinder 21.

[0035] The slide pedestal and the fixed pedestal 11 provided along the same axial direction are connected via a temporary clamping force reaction device. The temporary clamping force reaction device includes a cable 41 that penetrates the slider 22 and the fixed pedestal 11 provided along the same axis. The cable 41 is manufactured from one or more steel wire bundles, and the number of cables 41 is not limited. A cable 41 through hole is opened in the fixed pedestal 11, and an anchor 42 removably attached to the cable 41 is provided on one side of the slider 22 away from the fixed pedestal 11. By adjusting the magnitude of the temporary clamping force, the adjustment of the longitudinal dynamic stiffness of the bracket in the vertical balance state is realized.

[0036] Thread the cable 41 sequentially through the anchor 42 at one end, one slider 22, the cable 41 through-hole of the fixed pedestal 11, the slider 22 of the other slide pedestal, and the anchor 42 at the other end. When the elastic arm 31 with compressive deformation has a tendency to rebound, the slider 22 at its end is stopped by the anchor 42 at the end of the cable 41, restraining the rebound elongation of the elastic arm 31 in the opposite direction and exerting a compressive and temporary clamping effect on the elastic arm 31.

[0037] The slide pedestal, the elastic arm 31, and the temporary clamping force reaction device together form a vertical negative stiffness mechanism. Under the action of the permanent gravity load, the horizontally and symmetrically arranged elastic arms 31 do not affect the superstructure by self-balancing. When the main bracket deforms vertically due to the vibration action, the two ends of the elastic arm 31 and the concave circular surface slide relatively, the elastic arm 31 tilts, and the symmetrically arranged elastic arms 31 generate negative stiffness for the superstructure, and its positive stiffness with the main bracket cancels each other out, forming an effect of overall low stiffness or almost zero stiffness, which can block the up and down vibration in most frequency bands from propagating to the superstructure. Also, the temporary clamping force reaction device can adjust the magnitude of the temporary clamping force, making it easier to adjust the vertical dynamic stiffness of the bracket and realizing the anti-vibration function with adjustable dynamic stiffness at low frequencies.

Embodiment

[0038] As shown in FIGS. 3 to 4, the guide cylinder 21 in this embodiment has a semi-closed cylindrical structure. At one end of the guide cylinder 21 away from the fixed pedestal 11, a closing end plate 61 is provided. In this embodiment, instead of the cable 41, a push rod 62 with a male thread at the end is used. When the push rod 62 is used as a temporary clamping force reaction device, a tapped hole is opened in the end plate 61 inside the guide cylinder 21. After the push rod 62 is screwed into the tapped hole of the end plate 61, its tip clamps one end of the slider 22 in the guide cylinder 21. The push rod 62 may or may not have nuts arranged on both sides of the end plate 61. When the elastic arm 31 with a tendency to rebound is elastically deformed, the slider 22 hinged at its end is stopped by the tip of the push rod 62, restraining the rebound elongation of the elastic arm 31 in the opposite direction and exerting a compression and temporary clamping action on the elastic arm 31.

[0039] Except for the above alternative technical solutions, the rest is the same as in Embodiment 1.

[0040] The mounting method of the vibration isolation bracket with adjustable stiffness is as follows: After the construction of the necessary lower structure assembly 52 is completed, the bracket body 12 is mounted above the lower structure assembly 52 by bolt connection or welding. Next, in Step 1, the fixed pedestal 11 is mounted above the bracket body 12. In Step 2, the fixed pedestal 11 and the bracket body 12 are used as part of the support structure, and the construction of the upper structure assembly 51 is continuously carried out. At the same time, the subsequent installation of the slide pedestal, the elastic arm 31, and the temporary clamping force reaction device is carried out in parallel. The base 24 is mounted on the lower structure assembly 52. The slide pedestal and the base 24 are connected by the height adjustment member 23. The lower ends of the screws of the height adjustment member 23 are respectively inserted into the holes of the top connection plate of the base 24. Nuts located on the upper and lower sides of the top connection plate of the base 24 on the screws are tightened to connect the screws and the top connection plate of the base 24. Place the guide cylinder 21 above the height adjustment member 23 so that the upper ends of the screws pass through the holes in the bottom connection plate of the guide cylinder 21 respectively. By adjusting the height of the nuts on both the upper and lower sides of the bottom connection plate of the guide cylinder 21 on the screws, the adjustment of the level and elevation of the guide cylinder 21 is realized, and it is tightened to the screw, Step 3 of adjusting the level and elevation of the guide cylinder 21 by adjusting the two nuts located on both the upper and lower sides of the bottom connection plate of the guide cylinder 21 so that the axes of the pair of guide cylinders 21 arranged point-symmetrically with respect to the bracket body 12 in the horizontal projection plane are horizontal and at the same elevation, Step 4 of pushing the sliders 22 into the symmetrically arranged guide cylinders 21 respectively, passing the cable 41 sequentially through one anchor 42, one symmetrically arranged slider 22, the cable 41 through-hole of the fixed pedestal 11, the other symmetrically arranged slider 22, and the other anchor 42, or screwing the push rod 62 into the end plate 61, Keep the anchor 42 at the end of the cable 41 in a loose state, insert both ends of the elastic arm 31 into the concave cylindrical surfaces of the slider 22 and the fixed pedestal 11 located on the same side respectively, fit the convex cylindrical surfaces of the tip sleeves 32 at both ends into the two concave cylindrical surfaces respectively. In the same way, attach the elastic arm 31 into the concave cylindrical surfaces of the slider 22 and the fixed pedestal 11 on the other side of the fixed pedestal 11 so that the pair of elastic arms 31 overlap in the axial direction and are arranged point-symmetrically with respect to the bracket body 12 in the horizontal projection plane. Install a transverse connection spring 35 between the two elastic arms 31 located on the same side of the fixed pedestal 11. Step 6 of turning the anchors 42 at both ends of the cable 41 in the direction close to the slider 22 to restrain the elastic arms 31 between the slider 22 and the fixed pedestal 11 respectively, sequentially tightening the anchors 42 at both ends of the cable 41, the slider 22, the elastic arm 31 and the fixed pedestal 11, or after screwing the push rod 62 into the end plate 61, tightening the slider 22, the elastic arm 31 and the fixed pedestal 11, During the construction process of the upper structure assembly 51, monitor the settlement of the fixed pedestal 11 and the inclination of the elastic arm 31 due to the compressive deformation of the bracket body 12, complete the topmost part of the upper structure assembly 51, and after confirming that the compressive deformation of the bracket body 12 is stable, the pair of symmetrically arranged elastic arms 31 return to the horizontal state again. Step 7 of adjusting the elevation of the slide pedestal by the height adjustment member 23 again so that they are at the same elevation, Attach a tension jack to one end of the cable 41. The reaction end of the tension jack tightens the slider 22, use the tension jack to pull the cable 41, and utilize the pushing action of the jack on the slider 22 during the pulling process to slide the two end sliders 22 towards each other, compress the elastic arm 31, and increase the bending deformation of the leaf spring 33 due to the compression of the elastic arm 31. After applying a load to the jack until a predetermined value of the tensile force is reached, fix the anchor 42 at the pulling end again and remove the jack to form a temporary tightening on the elastic arm 31. Then the construction is completed. Or use a screw torque applying tool, continuously screw the push rods 62 at both ends into the end plates 61 respectively, utilize the pushing action of the push rods 62 on the slider 22 to slide the two end sliders 22 towards each other, compress the elastic arm 31, after applying a load to the screw torque applying tool until a predetermined value of the torque is reached, tighten the nuts located on both sides of the end plate 61 on the push rod 62 to form a tightening on the elastic arm 31, and then the construction is completed. This includes Step 8.

Embodiment

[0041] As shown in FIG. 5, in this embodiment, the fixed pedestal 11 and the bracket body 12 are placed horizontally, and the four sets of slide pedestals are provided in parallel front and back. The elastic arms 31 are still located on both the left and right sides of the bracket body 12.

Embodiment

[0042] As shown in FIG. 6, in this embodiment, the arrangement of the fixed pedestal 11 and the bracket body 12 is the same as that in Embodiment 1 and Embodiment 2, which is to be arranged vertically. However, the number of slide pedestals is four sets, and elastic arms 31 are provided on all four sides of the fixed pedestal 11.

[0043] This device is attached to the vibration isolation layer of various buildings, structures, bridges, facilities and other structures or instruments, determines the attachment position of the main bracket according to the load distribution of the upper structure, and can flexibly arrange the slide pedestal, elastic arm 31 and temporary clamping force reaction device on or around the main bracket.

[0044] Here, according to the requirements of the space layout, the vibration isolation bracket body 12 of the main bracket is arranged separately from other parts, forming a separation arrangement means to realize the utilization of the space of the vibration isolation layer.

[0045] The present invention can be flexibly arranged, and the detachment operation is easy. During the entire process of the construction and operation of the structure, the deformation and dynamic stiffness can be adjusted. By adjusting the magnitude of the temporary clamping force, the vertical dynamic stiffness of the bracket under the up-and-down balance state can be adjusted, thereby eliminating the deformation error caused by design and construction, and ensuring the vibration isolation function, safety and feasibility of the entire structure.

[0046] Finally, it should be noted that the above-mentioned each embodiment is only used to illustrate the technical solution of the present invention and is not intended to limit them. The present invention will be described in more detail with reference to the above-mentioned each embodiment. However, those skilled in the art should understand that they can modify the technical solutions described in the above-mentioned each embodiment, or perform equivalent substitutions for some or all of the technical features therein. It should be understood that these modifications or equivalent substitutions do not deviate from the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Description of Reference Signs

[0047] 11 Fixed pedestal 12 Bracket body 21 Guide cylinder 22 Slider 23 Height adjustment member 24 Base 31 Elastic arm 32 Tip sleeve 33 Leaf spring 34 Hoop 35 Lateral connecting spring 41 Cable 42 Anchor 51 Upper structure assembly 52 Lower structure assembly 61 End plate 62 Pushing rod

Claims

1. A vibration isolation support bracket with adjustable stiffness, comprising a fixed pedestal and a slide pedestal located outside the fixed pedestal. Inside the slide pedestal, a slider slidably connected is provided. An elastic arm is provided between the fixed pedestal and the slide pedestal. Both ends of the elastic arm are slidably attached to the concave cylindrical surfaces of the fixed pedestal and the slider respectively. The slide pedestal and the fixed pedestal provided along the same axial direction are connected via a temporary clamping force reaction device. A vibration isolation support bracket with adjustable stiffness, characterized in that.

2. The fixed pedestal is attached between an upper structure assembly and a lower structure assembly. The fixed pedestal and the upper structure assembly are removably connected. The fixed pedestal and the lower structure assembly are connected via a bracket body. The vibration isolation support bracket with adjustable stiffness according to Claim 1, characterized in that.

3. The slide pedestal includes a guide cylinder and the slider slidably attached inside the guide cylinder. A base attached to the lower structure assembly is provided between the slide pedestal and the lower structure assembly. The slide pedestal and the base are connected via a height adjustment member. The vibration isolation support bracket with adjustable stiffness according to Claim 2, characterized in that.

4. The height adjustment member includes a screw passing through the guide cylinder and the base. Two nuts located on both the upper and lower sides of the top connection plate of the base and two nuts located on both the upper and lower sides of the bottom connection plate of the guide cylinder are both screwed onto the screw. The vibration isolation support bracket with adjustable stiffness according to Claim 3, characterized in that.

5. The elastic arm is formed by stacking one or more leaf springs and connecting them with a hoop. Tip sleeves cover both ends of the leaf spring. The tip sleeves are slidably connected to the concave cylindrical surface of the slider or the fixed pedestal. The vibration isolation support bracket with adjustable stiffness according to Claim 4, characterized in that.

6. The temporary clamping force reaction device includes a cable passing through the slider and the fixed pedestal provided along the same axis, and an anchor removably attached to the cable is provided on one side of the slider away from the fixed pedestal. The vibration isolation support bracket with adjustable stiffness according to claim 5 is characterized in that.

7. The vibration isolation support bracket with adjustable stiffness according to claim 5 is characterized in that a lateral connection spring is provided between the two elastic arms located on the same side of the fixed pedestal.

8. An end plate is provided at a position within the guide cylinder away from the fixed pedestal, a threaded hole is formed in the end plate, the temporary clamping force reaction device includes a push rod screwed into the threaded hole, and one end of the push rod close to the fixed pedestal is slidably connected to the outer surface of the slider. The vibration isolation support bracket with adjustable stiffness according to claim 7 is characterized in that.

9. A method for installing a vibration isolation bracket with adjustable stiffness according to any one of claims 1 to 8, Step 1 of attaching the fixed pedestal and the bracket body above the constructed lower structure assembly, Step 2 of using the fixed pedestal and the bracket body as part of the support structure and continuously constructing the upper structure assembly, and at the same time, attaching the subsequent slide pedestal, elastic arms and temporary clamping force reaction device in parallel, Step 3 of attaching the base to the lower structure assembly, connecting the slide pedestal and the base via a height adjustment member, and adjusting the two nuts located on the upper and lower sides of the bottom connection plate of the guide cylinder so that the axes of the pair of guide cylinders arranged point-symmetrically with respect to the bracket body in the horizontal projection plane are horizontal and at the same elevation, thereby realizing the adjustment of the horizontality and elevation of the guide cylinder, Step 4 of pushing the sliders into the symmetrically arranged guide cylinders respectively, passing the cable sequentially through one anchor, one symmetrically arranged slider, the cable through-hole of the fixed pedestal, the other symmetrically arranged slider, and the other anchor, or screwing the push rod into the end plate. Keep the anchor at the cable end in a loose state, insert both ends of the elastic arm into the slider located on the same side and the concave cylindrical surface of the fixed pedestal respectively, fit the convex cylindrical surfaces of the tip sleeves at both ends into the two concave cylindrical surfaces respectively, and in the same way, arrange the pair of elastic arms so that they overlap in the axial direction and are point-symmetric with respect to the bracket body on the horizontal projection plane. Step 5 of installing the elastic arm into the slider on the other side of the fixed pedestal and within the concave cylindrical surface of the fixed pedestal. In order to restrain the elastic arms between the slider and the fixed pedestal respectively, turn the anchors at both ends of the cable in the direction close to the slider, tighten the anchors at both ends of the cable, the slider, the elastic arms and the fixed pedestal in sequence, or after screwing the push rod into the end plate, tighten the slider, the elastic arm and the fixed pedestal. Step 6. During the construction process of the upper structure assembly, monitor the settlement of the fixed pedestal and the inclination of the elastic arm due to the compression deformation of the bracket body. After completing the topmost part of the upper structure assembly and confirming that the compression deformation of the bracket body is stable, adjust the elevation of the slide pedestal again by the height adjustment member so that the pair of symmetrically arranged elastic arms return to the horizontal state again and reach the same elevation. Step 7. Attach a tension jack to one end of the cable. The reaction end of the tension jack tightens the slider, use the tension jack to pull the cable, and utilize the pushing action of the jack on the slider during the pulling process to slide the two ends of the slider towards each other, compress the elastic arm, increase the bending deformation of the leaf spring due to the compression of the elastic arm, apply a load to the jack until it reaches a predetermined value of the tensile force, then fix the anchor at the pulling end again and remove the jack to form a temporary tightening on the elastic arm, and the construction is completed. Or use a screw torque applying tool to continuously screw the push rods at both ends into the end plates respectively, utilize the pushing action of the push rods on the slider to slide the two ends of the slider towards each other, compress the elastic arm, apply a load to the screw torque applying tool until it reaches a predetermined value of the torque, then tighten the nuts located on both sides of the end plate on the push rod to form a tightening on the elastic arm, and the construction is completed. Step 8, characterized in that the installation method includes the above steps.

10. The method for attaching a vibration isolation bracket with adjustable stiffness according to claim 9, wherein in the step 5, a lateral connection spring is attached between two elastic arms located on the same side of the fixed pedestal.

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