JP7752841B2 - Vibration-proof bracket with adjustable stiffness and its installation method - Google Patents

Description

The present invention relates to the field of earthquake damping and disaster prevention in civil engineering, and in particular to vibration isolation brackets with adjustable stiffness and their installation methods.

China is the country with the largest number of rail transport operations and constructions, with the total mileage of urban railways exceeding that of any other country combined. Many urban buildings are developed along or near railway lines, exposing them to the threat of traffic vibrations, which have a serious impact on building functionality and urban living environments, making vibration-proofing (earthquake-proofing) technology an urgent solution. At the same time, approximately 85.7% of China's large and medium-sized cities are located in earthquake zones. According to the "Regulations on the Earthquake Management of Construction Projects" (State Council Order No. 744) promulgated by the State Council in 2021, "Newly constructed buildings, such as schools, kindergartens, hospitals, nursing homes, child welfare facilities, emergency command centers, emergency shelters, and broadcasting stations, in high-seismic fortified areas and key earthquake monitoring and defense areas must adopt seismic damping and other technologies in accordance with relevant national regulations to ensure that these buildings meet the normal operating requirements in the event of an earthquake." Therefore, the promotion and application of vibration-proofing (earthquake-proofing) technology has become one of the mainstream technologies for earthquake prevention and disaster prevention in China.

Against this backdrop, there has been an increase in vibration (earthquake) isolation projects for large-scale buildings, large structures, long bridges, and heavy-duty equipment and instruments, resulting in ever-increasing demands for vibration (earthquake) isolation bracket products. To ensure the feasibility of construction and the safety of the brackets, they must exhibit minimal deformation when withstanding the gravity load of the superstructure. Furthermore, to ensure three-dimensional vibration (earthquake) isolation, the brackets must also have low rigidity against multi-directional environmental vibrations and seismic actions.

However, currently mature anti-vibration (earthquake prevention) bracket products still cannot meet the above requirements, with the main problems being as follows: Currently, anti-vibration (earthquake prevention) bracket products have limitations in structural shape and material properties, and their vertical stiffness is mainly linear or has hard spring characteristics, with no adjustment function after installation on the structure. As a result, when applied to low-frequency anti-vibration (earthquake prevention) engineering designs, the vertical deformation of the bracket is too large, making it easy for uncontrollable problems to occur in terms of construction precision and structural safety. However, increasing the stiffness and reducing the deformation will result in the loss of low-frequency anti-vibration (earthquake prevention) function, failing to meet engineering requirements.

The object of the present invention is to provide an anti-vibration bracket with adjustable stiffness and an installation method thereof, which has high stiffness and little deformation when bearing the initial gravitational static load of the superstructure, and low stiffness and high vibration-damping efficiency against vertical vibrations after bearing the initial load, and whose deformation and dynamic stiffness can be adjusted throughout the entire construction and operation process of the structure.

The present invention provides an anti-vibration bracket with adjustable rigidity, which includes a fixed base and a sliding base located outside the fixed base. A slider is slidably connected to the inside of the sliding base, and an elastic arm is provided between the fixed base and the sliding base. Both ends of the elastic arm are slidably attached to the concave cylindrical surfaces of the fixed base and the slider, respectively. The sliding base and fixed base, which are arranged along the same axial direction, are connected via a temporary tightening force reaction device.

Furthermore, the fixed base is attached between the upper structural assembly and the lower structural assembly, the fixed base and the upper structural assembly are removably connected, and the fixed base and the lower structural assembly are connected via a bracket body.

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

Furthermore, the height adjustment member includes a screw that passes through the guide cylinder and the base, and two nuts located on both the upper and lower sides of the top connecting plate of the base and two nuts located on both the upper and lower sides of the bottom connecting plate of the guide cylinder are both threaded onto the screw.

Furthermore, the elastic arm is made up of one or more stacked leaf springs connected by a hoop, and both ends of the leaf spring are covered with tip sleeves, which are slidably connected to the concave cylindrical surface of the slider or the fixed base.

Furthermore, the temporary tightening force reaction device includes a cable that passes through the slider and the fixed base, which are arranged along the same axis, and an anchor that is removably attached to the cable is provided on one side of the slider that is away from the fixed base.

Furthermore, a lateral connecting spring is provided between the two elastic arms located on the same side of the fixed base.

Furthermore, an end plate is provided in the guide cylinder at a position away from the fixed base, and a threaded hole is drilled in the end plate. The temporary tightening force reaction device includes a push rod threaded into the threaded hole, and one end of the push rod closest to the fixed base is slidably connected to the outer surface of the slider.

The present invention further provides a method for mounting an adjustable stiffness anti-vibration bracket, the method comprising:
Step 1: attaching the fixed base and the bracket body above the constructed substructure assembly;
Step 2: Using the fixed base and the bracket body as part of the support structure, the construction of the upper structure assembly is continued, and at the same time, the subsequent installation of the slide base, the elastic arm and the temporary fastening force reaction device is carried out in parallel;
Step 3: 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 both the upper and lower sides of the bottom connecting plate of the guide cylinders 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 altitude, thereby adjusting the levelness and altitude of the guide cylinders;
Step 4: pushing the sliders into the symmetrically arranged guide cylinders, and passing the cable through one anchor, one symmetrically arranged slider, the cable through-hole of the fixed base, another symmetrically arranged slider, and another anchor, or screwing the push rod into the end plate;
Step 5: while keeping the anchor at the cable end in a loose state, inserting both ends of the elastic arm into the concave cylindrical surfaces of the slider and the fixed base located on the same side, respectively, and fitting the convex cylindrical surfaces of the tip sleeves at both ends into the two concave cylindrical surfaces, respectively, and attaching the elastic arm to the other side of the fixed base in the same way within the concave cylindrical surfaces of the slider and the fixed base so that the pair of elastic arms overlap in the axial direction and are arranged point-symmetrically with respect to the bracket body in the horizontal projection plane;
Step 6: turning the anchors at both ends of the cable toward the slider, and tightening the anchors at both ends of the cable, the slider, the elastic arms, and the fixed base in order to restrain the elastic arms between the slider and the fixed base, respectively, or screwing the push rod into the end plate and then tightening the slider, the elastic arms, and the fixed base;
Step 7: During the construction of the superstructure assembly, the sinking of the fixed base and the tilting of the elastic arms due to the compressive deformation of the bracket body are monitored. After completing the top of the superstructure assembly and confirming that the compressive deformation of the bracket body is stable, the height of the sliding base is adjusted again by the height adjusting member so that the pair of symmetrically arranged elastic arms return to a horizontal state and are at the same height.
Step 8 includes attaching a tension jack to one end of the cable, tightening a slider at the reaction end of the tension jack, and using the tension jack to tension the cable. During the tensioning process, the jack pushes against the slider, causing the sliders at both ends to slide toward each other and compress the elastic arms. The compression of the elastic arms increases the bending deformation of the leaf spring. After a predetermined tension is applied to the jack, the anchors at the tension ends are fixed again and the jack is removed, forming a temporary clamp on the elastic arms, thereby completing the construction. Alternatively, a screw torque application tool is used to continue screwing the push rods at both ends into the end plates, and the push rods push against the sliders, causing the sliders at both ends to slide toward each other and compress the elastic arms. After a predetermined torque is applied to the screw torque application tool, the nuts on both sides of the end plates of the push rods are tightened, thereby completing the clamp on the elastic arms.

Furthermore, in step 5, a lateral connection spring is attached between the two elastic arms located on the same side of the fixed base.

The present invention allows for flexible placement and easy installation and removal. Its deformation and dynamic rigidity can be adjusted throughout the entire construction and operation process of the structure. By adjusting the magnitude of the pre-tightening force, the vertical dynamic rigidity of the bracket can be adjusted under a balanced state, thereby eliminating deformation errors due to design and construction and ensuring the vibration isolation function, safety, and feasibility of the entire structure.

In order to more clearly explain specific embodiments of the present invention or the technical solutions of the prior art, the following briefly introduces drawings necessary for describing 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 derive other drawings based on these drawings without any creative effort.

FIG. 1 is a structural schematic diagram of a first embodiment of the present invention. FIG. 1 is a top view of a first embodiment of the present invention. FIG. 2 is a structural schematic diagram of a second embodiment of the present invention; FIG. 10 is a top view of a second embodiment of the present invention. FIG. 10 is a top view of a third embodiment of the present invention. FIG. 10 is a top view of a fourth embodiment of the present invention.

The technical solutions of the present invention will be clearly and completely described below with reference to the following examples. Obviously, the described examples are only some, but not all, of the present invention. All other examples that can be obtained by those skilled in the art based on the examples of the present invention without creative work fall within the scope of protection of the present invention.

In describing the present invention, as necessary for understanding, orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. are based on the orientations or positional relationships shown in the accompanying drawings and are used only to explain and simplify the description of the present invention. They do not indicate or imply that the devices or elements referred to have a particular orientation or must be constructed and operated in a particular direction, and therefore should not be construed as limitations on the present invention.

Additionally, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying the relative importance or quantity of technical features. Therefore, features delimited by "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the term "plurality" refers to two or more. Additionally, the terms "attached," "coupled," and "connected" should be understood in a broad sense. For example, "connected" may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection via an intermediate medium; or it may be communication between two elements. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in a specific context.

As shown in FIGS. 1 and 2,
The vibration-proof bracket with adjustable rigidity includes a fixed base 11 and slide bases located on both the left and right sides of the fixed base 11, and the two left and right side surfaces of the fixed base 11 are provided with concave cylindrical surfaces, and the two slide bases and the fixed base 11 are arranged along the same axis and at the same altitude.

The fixed base 11 is attached between the upper structural assembly 51 and the lower structural assembly 52, and the fixed base 11 and the upper structural assembly 51 are removably connected, and the fixed base 11 and the lower structural assembly are connected via the bracket body 12.

The bracket body 12 is a spring-type vibration-damping bracket, a thick rubber-type vibration-damping bracket, or other general-purpose vibration-damping bracket.

The slide base includes a guide cylinder 21 and a slider 22 attached inside the guide cylinder 21, and a concave cylindrical surface is also provided on the surface of the slider 22 closest to the fixed base 11.

The guide cylinder 21 is a hollow cylinder with a uniform cross section, and the slider 22 also has a uniform cross section. The outer circular shape of its cross section fits the inner circular shape of the cross section of the guide cylinder 21. The slider 22 is placed within the guide cylinder 21, its axial direction coincides with the axial direction of the guide cylinder 21, and its side engages with the inner surface of the guide cylinder 21. The gap between the mating surfaces may or may not be filled with slide material so that the slider 22 can slide relatively along the axial direction of the guide cylinder 21.

Alternatively, the guide cylinder 21 may be semi-closed cylindrical or plate-shaped, with a sliding guide rail added thereon for frictional contact with the slider 22.

An elastic arm 31 is provided between the fixed base 11 and the sliding base. The elastic arm 31 is made up of one or more stacked leaf springs 33 with an initial curvature connected by a hoop 34. Both ends of the leaf spring 33 are covered with tip sleeves 32. The tip sleeves 32 on both ends of the elastic arm 31 are slidably attached within the concave cylindrical surfaces of the fixed base 11 and the slider 22, respectively, and the tip sleeves 32 are slidably connected to the concave cylindrical surface of the slider 22 or fixed base 11.

The tip sleeve 32 does not need to be provided at the end of the leaf spring 33; it is sufficient to simply machine the end of the leaf spring 33 into a convex cylindrical surface and align the generatrix direction of the convex cylindrical surface with the generatrix direction of the concave cylindrical surface of the slider 22.

A lateral connection spring 35 is provided between two elastic arms 31 located on the same side of the fixed base 11.

In addition to the combination of leaf springs 33 described above, the elastic arm 31 can also be made of one or more parallel-connected coil springs, overlapping rubber springs, or overlapping disk-shaped springs.

A base 24 attached to the lower structure assembly 52 is provided between the guide cylinder 21 and the lower structure assembly. The guide cylinder 21 and base 24 are connected via a height adjustment member 23, and a double beam may be provided between multiple bases 24.

The height adjustment member 23 includes a screw that passes through the guide cylinder 21 and the base 24. A circular hole is drilled in the bottom connecting plate of the guide cylinder 21, and a corresponding circular connecting hole is drilled in the top connecting plate of the base 24. Two nuts are provided on both the top and bottom sides of the circular hole in the top connecting plate of the base 24, and two nuts are also provided on both the top and bottom sides of the circular hole in the bottom connecting plate of the guide cylinder 21. Screws pass through the two circular holes, and four nuts are threaded onto the screws. Gaskets or spacers may be provided at the contact points between the four nuts and the connecting plate.

After the screws are installed, the two nuts located on both the upper and lower sides of the top connecting plate of the ace 24 are turned toward the top connecting plate of the base 24 and tightened, and the two nuts located on both the upper and lower sides of the bottom connecting plate of the guide cylinder 21 are turned toward the bottom connecting plate of the guide cylinder 21 and tightened, thereby adjusting the height of each nut and adjusting the height and tilt of the upper guide cylinder 21.

The sliding base and fixed base 11, which are arranged along the same axial direction, are connected via a pre-tightening force reaction device. The pre-tightening force reaction device includes a cable 41 that passes through the slider 22 and fixed base 11, which are arranged along the same axis. The cable 41 is made of one or more stranded steel wire bundles, and the number of cables 41 is not limited. A cable 41 through-hole is drilled in the fixed base 11, and an anchor 42 removably attached to the cable 41 is provided on one side of the slider 22 away from the fixed base 11. By adjusting the magnitude of the pre-tightening force, the vertical dynamic rigidity of the bracket when in a vertically balanced state can be adjusted.

The cable 41 is passed sequentially through the anchor 42 at one end, one slider 22, the cable 41 through-hole in the fixed base 11, the slider 22 on another slide base, and the anchor 42 at the other end. When the compressed and deformed elastic arm 31 has a tendency to rebound, the slider 22 at that end is stopped by the anchor 42 at the end of the cable 41, restraining the rebound extension of the elastic arm 31 in the opposite direction and performing a compressive and temporary tightening action on the elastic arm 31.

The sliding base, elastic arm 31, and pre-tightening force reaction device together form a vertical negative stiffness mechanism. Under the action of permanent gravity load, the horizontally and symmetrically arranged elastic arm 31 self-balances and has no effect on the superstructure. When the main bracket deforms vertically due to vibration, the ends of the elastic arm 31 slide relative to the concave circular surface, causing the elastic arm 31 to tilt. The tilted and symmetrically arranged elastic arm 31 generates negative stiffness with respect to the superstructure, which cancels out the positive stiffness of the main bracket, creating an overall effect of low or almost zero stiffness, blocking the transmission of vertical vibrations across most frequency bands to the superstructure. The pre-tightening force reaction device also makes it easy to adjust the magnitude of the pre-tightening force and the vertical dynamic stiffness of the bracket, achieving low-frequency vibration-damping functionality with adjustable dynamic stiffness.

As shown in Figures 3 and 4, the guide cylinder 21 in this embodiment has a semi-closed cylindrical structure. A closing end plate 61 is provided at one end of the guide cylinder 21 that is away from the fixed base 11. In this embodiment, a push rod 62 with a male thread at the end is used instead of the cable 41. When the push rod 62 is used as a pre-tightening force reaction device, a tapped hole is drilled in the end plate 61 inside the guide cylinder 21. After the push rod 62 is threaded into the tapped hole in the end plate 61, its tip tightens one end of the slider 22 in the guide cylinder 21. The push rod 62 may or may not have nuts on both sides of the end plate 61. When the compressed elastic arm 31 has a rebound tendency, the slider 22, which is hinged to its end, is stopped by the tip of the push rod 62, which restricts the rebound extension of the elastic arm 31 in the opposite direction, performing a compression and pre-tightening function on the elastic arm 31.

Except for the above alternative technical solutions, everything else is the same as in Example 1.

The installation method for the vibration isolation bracket with adjustable stiffness is as follows:
Step 1: after the construction of the necessary lower structure assembly 52 is completed, the bracket body 12 is attached to the upper part of the lower structure assembly 52 by bolt connection or welding, and then the fixing base 11 is attached to the upper part of the bracket body 12;
Step 2: using the fixed base 11 and the bracket body 12 as part of the support structure, continuously constructing the upper structure assembly 51, and simultaneously installing the subsequent slide base, elastic arm 31, and temporary fastening force reaction device;
The base 24 is attached to the lower structure assembly 52, and the height adjustment members 23 are used to connect the slide base and the base 24. The lower ends of the screws of the height adjustment members 23 are inserted into the holes in the top connecting plate of the base 24, and the nuts located on the upper and lower sides of the top connecting plate of the base 24 are tightened on the screws to connect the screws to the top connecting plate of the base 24.
The guide cylinder 21 is placed above the height adjusting member 23 so that the upper ends of the screws pass through the holes in the bottom connecting plate of the guide cylinder 21, and the height of the guide cylinder 21 is adjusted by adjusting the height of the nuts on the upper and lower sides of the bottom connecting plate of the guide cylinder 21, and then the nuts are fastened to the screws.
Step 3: Adjusting the two nuts located on both the upper and lower sides of the bottom connecting plate of the guide cylinders 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 altitude; thereby adjusting the horizontality and altitude of the guide cylinders 21;
Step 4: pushing the sliders 22 into the symmetrically arranged guide cylinders 21, and passing the cable 41 through one anchor 42, one symmetrically arranged slider 22, the cable 41 through-hole of the fixed base 11, another symmetrically arranged slider 22, and another anchor 42, or screwing the push rod 62 into the end plate 61;
Step 5: keeping the anchor 42 at the end of the cable 41 in a loose state, inserting both ends of the elastic arm 31 into the concave cylindrical surfaces of the slider 22 and fixed base 11 located on the same side, fitting the convex cylindrical surfaces of the tip sleeves 32 at both ends into the two concave cylindrical surfaces, and attaching the elastic arms 31 to the slider 22 and the concave cylindrical surfaces of the fixed base 11 on the other side of the fixed base 11 in the same way 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, and attaching a lateral connection spring 35 between the two elastic arms 31 located on the same side of the fixed base 11;
Step 6: to restrain the elastic arms 31 between the slider 22 and the fixed base 11, the anchors 42 at both ends of the cable 41 are turned toward the slider 22, and the anchors 42 at both ends of the cable 41, the slider 22, the elastic arms 31, and the fixed base 11 are sequentially fastened, or the push rod 62 is screwed into the end plate 61, and then the slider 22, the elastic arms 31, and the fixed base 11 are fastened;
In the construction process of the upper structure assembly 51, the sinking of the fixed base 11 and the tilting of the elastic arms 31 due to the compressive deformation of the bracket body 12 are monitored, and after completing the top of the upper structure assembly 51 and confirming that the compressive deformation of the bracket body 12 is stable, the height of the slide base is adjusted again by the height adjusting members 23 so that the pair of symmetrically arranged elastic arms 31 return to a horizontal state and are at the same altitude. Step 7.
A tension jack is attached to one end of the cable 41, and the reaction end of the tension jack tightens the slider 22. The tension jack is used to pull the cable 41. During the pulling process, the jack pushes the slider 22, causing the sliders 22 at both ends to slide toward each other, compressing the elastic arms 31. The compression of the elastic arms 31 increases the bending deformation of the leaf spring 33. After applying a load to the jack up to a predetermined tensile force, the anchor 42 at the pulling end is fixed again and the jack is removed, and the elastic arms 31 are released. and (8) using a screw torque application tool to continue screwing the push rods 62 at both ends into the end plates 61, and using the pushing action of the push rods 62 against the sliders 22 to slide the sliders 22 toward each other, compressing the elastic arms 31, and applying a load to the screw torque application tool up to a predetermined torque value, and then tightening the nuts located on both sides of the end plates 61 on the push rods 62 to form a clamping force on the elastic arms 31, thereby completing construction.

As shown in Figure 5, in this embodiment, the fixed base 11 and bracket body 12 are placed horizontally, and four sets of sliding bases are arranged in parallel front and back, with the elastic arms 31 still positioned on both the left and right sides of the bracket body 12.

As shown in Figure 6, in this embodiment, the arrangement of the fixed base 11 and bracket body 12 is the same as in Examples 1 and 2, that is, arranged vertically. However, there are four sets of sliding bases, and elastic arms 31 are provided on all four sides of the fixed base 11.

This device can be attached to the vibration isolation layer of various buildings, structures, bridges, equipment, and other structures or devices, and the installation position of the main bracket can be determined according to the load distribution of the superstructure, allowing for flexible placement of the slide base, elastic arm 31, and temporary tightening force reaction device on or around the main bracket.

Here, according to the spatial layout requirements, the vibration-damping bracket body 12 of the main bracket is positioned separately from other parts, forming a separate positioning means and realizing spatial utilization of the vibration-damping layer.

The present invention allows for flexible placement and easy installation and removal. Its deformation and dynamic rigidity can be adjusted throughout the entire construction and operation process of the structure. By adjusting the magnitude of the pre-tightening force, the vertical dynamic rigidity of the bracket can be adjusted under a balanced state, thereby eliminating deformation errors due to design and construction and ensuring the vibration isolation function, safety, and feasibility of the entire structure.

Finally, it should be noted that the above embodiments are only used to describe the technical solutions of the present invention and are not intended to limit them. The present invention will be described in more detail with reference to the above embodiments. However, those skilled in the art should understand that they may modify the technical solutions described in the above embodiments or make equivalent substitutions for some or all of the technical features thereof, and these modifications or equivalent substitutions will not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

REFERENCE SIGNS LIST 11 Fixed base 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 Horizontal connection spring 41 Cable 42 Anchor 51 Upper structure assembly 52 Lower structure assembly 61 End plate 62 Push rod

Claims (8)

An anti-vibration support bracket with adjustable stiffness, comprising a fixed base and a sliding base located outside the fixed base, a slider slidably connected to the inside of the sliding base, an elastic arm provided between the fixed base and the sliding base, both ends of the elastic arm slidably attached to the fixed base and the concave cylindrical surface of the slider, respectively, and the sliding base and fixed base, which are arranged along the same axial direction, are connected via a temporary tightening force reaction device. The anti-vibration support bracket with adjustable stiffness described in claim 1, characterized in that the fixed base is attached between an upper structural assembly and a lower structural assembly, the fixed base and the upper structural assembly are removably connected, and the fixed base and the lower structural assembly are connected via the bracket body. The anti-vibration support bracket with adjustable rigidity described in claim 2, characterized in that the sliding base includes a guide cylinder and the slider slidably mounted inside the guide cylinder, a base attached to the lower structure assembly is provided between the sliding base and the lower structure assembly, and the sliding base and the base are connected via a height adjustment member. The height adjustment member includes a screw that passes through the guide cylinder and the base, and two nuts located on both the upper and lower sides of the top connecting plate of the base and two nuts located on both the upper and lower sides of the bottom connecting plate of the guide cylinder are both threaded onto the screw. The rigidity-adjustable vibration-proof support bracket described in claim 3. The vibration-damping support bracket with adjustable stiffness described in claim 4, characterized in that the elastic arm is made of one or more stacked leaf springs connected by a hoop, and both ends of the leaf spring are covered with tip sleeves, which are slidably connected to the concave cylindrical surface of the slider or the fixed base. The vibration-damping support bracket with adjustable stiffness described in claim 5, characterized in that the temporary tightening force reaction device includes a cable that passes through the slider and the fixed base, which are arranged along the same axis, and an anchor that is removably attached to the cable is provided on one side of the slider that is away from the fixed base. The vibration-damping support bracket with adjustable stiffness described in claim 5, characterized in that a lateral connecting spring is provided between two of the elastic arms located on the same side of the fixed base. The vibration-damping support bracket with adjustable stiffness described in claim 7, characterized in that an end plate is provided in a position within the guide cylinder away from the fixed base, the end plate has a threaded hole, the temporary tightening force reaction device includes a push rod threaded into the threaded hole, and one end of the push rod closest to the fixed base is slidably connected to the outer surface of the slider.