Vibration-proof bracket with adjustable stiffness and its installation 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 in particular to an anti-vibration bracket with adjustable stiffness and its installation method. [Background technology]

[0002] 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 environmental vibrations, which severely impact building functions and urban living environments. This has led to an urgent need for solutions using vibration-damping (earthquake-proofing) technologies. 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 widespread adoption and application of vibration-damping (earthquake-proofing) technologies has become a mainstream technology for earthquake prevention and disaster prevention in China.

[0003] Against the backdrop of the above demand, there has been an increase in vibration (earthquake) isolation projects for large-scale buildings, large structures, long bridges, and heavy-tonnage 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 bracket, it is required that the bracket has minimal deformation when withstanding the gravity load of the superstructure, and also that the bracket has low rigidity against multi-directional environmental vibrations and seismic actions to ensure three-dimensional vibration (earthquake) isolation effects.

[0004] However, currently mature anti-vibration (earthquake prevention) bracket products still cannot meet the above requirements, with the main problems being as follows: current 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. Therefore, when applied to low-frequency anti-vibration (earthquake prevention) engineering designs, the vertical deformation of the bracket is too large, which is likely to cause uncontrollable problems in construction precision and structural safety. However, increasing the stiffness to reduce the deformation will result in the loss of low-frequency anti-vibration (earthquake prevention) function, failing to meet engineering requirements. Summary of the Invention

[0005] 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 has low stiffness and high vibration-damping efficiency against up and down vibrations after bearing the initial load, and whose deformation and dynamic stiffness can be adjusted throughout the entire process of construction and operation of the structure.

[0006] 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, wherein a slider slidably connected to the inside of the sliding base is provided, and an elastic arm is provided between the fixed base and the sliding base, and both ends of the elastic arm are slidably attached to the concave cylindrical surfaces of the fixed base and the slider, respectively, and the sliding base and the fixed base, which are arranged along the same axial direction, are connected via a temporary tightening force reaction device.

[0007] 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.

[0008] Furthermore, the slide base includes a guide cylinder and the slider slidably mounted inside the guide cylinder, and 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.

[0009] 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.

[0010] 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.

[0011] 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.

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

[0013] Furthermore, an end plate is provided at a position within the guide cylinder away from the fixed base, and a screw hole is drilled in the end plate. The temporary tightening force reaction device includes a push rod screwed into the screw hole, and one end of the push rod close to the fixed base is slidably connected to the outer surface of the slider.

[0014] 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 bracket body above the constructed substructure assembly; Step 2: using the fixed base and the bracket body as part of the support structure, continuously constructing the upper structure assembly, and simultaneously installing the subsequent slide base, elastic arm and temporary fastening force reaction device; 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 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 pair of symmetrically arranged elastic arms are returned to a horizontal state and are at the same altitude. 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 presses 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 the jack is loaded to a predetermined tension value, 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 press against the sliders, causing the sliders at both ends to slide toward each other and compress the elastic arms. After the screw torque application tool is loaded to a predetermined torque value, the nuts on both sides of the end plates of the push rods are tightened, thereby completing the clamp on the elastic arms.

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

[0016] The present invention allows for flexible configuration and easy installation and removal. The deformation and dynamic stiffness can be adjusted throughout the entire construction and operation of the structure. By adjusting the magnitude of the pre-tightening force, the vertical dynamic stiffness of the bracket can be adjusted under the vertical balance state, thereby eliminating deformation errors caused by design and construction and ensuring the vibration isolation function, safety, and feasibility of the entire structure.

[0017] In order to more clearly describe the specific embodiments of the present invention or the technical solutions of the prior art, the following will briefly introduce the drawings necessary for describing 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 efforts. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a structural schematic diagram of a first embodiment of the present invention. [Figure 2] FIG. 1 is a top view of a first embodiment of the present invention. [Figure 3] FIG. 2 is a structural schematic diagram of the second embodiment of the present invention. [Figure 4] FIG. 10 is a top view of a second embodiment of the present invention. [Figure 5] FIG. 10 is a top view of a third embodiment of the present invention. [Figure 6] FIG. 10 is a top view of a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] The technical solutions of the present invention will be described clearly and completely below with reference to the embodiments, and it is obvious that the described embodiments are only some but not all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

[0020] 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 orientations or positional relationships shown in the accompanying drawings and are used only to explain and simplify the description of the present invention, and 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.

[0021] 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. [Example]

[0022] As shown in Figures 1 and 2, The vibration-proof bracket with adjustable rigidity includes a fixed base 11 and sliding bases located on both the left and right sides of the fixed base 11, with concave cylindrical surfaces on the two left and right sides of the fixed base 11, and the two sliding bases and the fixed base 11 are arranged along the same axis and at the same height.

[0023] 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.

[0024] The bracket body 12 may be a spring-type vibration-proof bracket, a thick rubber-type vibration-proof bracket, or any other general-purpose vibration-proof bracket.

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

[0026] The guide cylinder 21 is a hollow cylinder with a uniform cross section, and the slider 22 has a uniform cross section, and 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 engages with the inner surface of the guide cylinder 21, and the gap between the engaging surfaces may or may not be filled with a slide material so that the slider 22 slides relatively along the axial direction of the guide cylinder 21.

[0027] Alternatively, the guide cylinder 21 may be semi-closed cylindrical or plate-shaped, on which a sliding guide rail may be added for frictional contact with the slider 22 .

[0028] An elastic arm 31 is provided between the fixed base 11 and the sliding base, and the elastic arm 31 is made by stacking one or more leaf springs 33 with an initial curvature and connecting them with a hoop 34, and both ends of the leaf spring 33 are covered with tip sleeves 32, and the tip sleeves 32 at both ends of the elastic arm 31 are respectively attached so as to be slidable within the concave cylindrical surfaces of the fixed base 11 and the slider 22, and the tip sleeves 32 are connected so as to be slidable on the concave cylindrical surface of the slider 22 or the fixed base 11.

[0029] 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 shape and align the generatrix direction of the convex cylindrical surface with the generatrix direction of the concave cylindrical surface of the slider 22.

[0030] A horizontal connecting spring 35 is provided between two elastic arms 31 located on the same side of the fixed base 11.

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

[0032] A base 24 attached to the lower structure assembly 52 is provided between the guide cylinder 21 and the lower structure assembly, and the guide cylinder 21 and the base 24 are connected via a height adjustment member 23, and a double beam can be provided between multiple 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 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 upper and lower sides of the circular hole in the top connecting plate of the base 24, and two nuts are also provided on both the upper and lower 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.

[0034] After the screws are installed, the two nuts located on 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 to tighten, and the two nuts located on 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 to tighten, thereby achieving the height of each nut and adjusting the height and inclination of the upper guide cylinder 21.

[0035] The sliding base and the fixed base 11, which are arranged along the same axial direction, are connected via a pre-tightening force reaction device, and the pre-tightening force reaction device includes a cable 41 that passes through the slider 22 and the fixed base 11, which are arranged along the same axis, and the cable 41 is made of one or more stranded steel wire bundles, and the number of cables 41 is not limited, and a cable 41 through hole is opened in the fixed base 11, and an anchor 42 that is removably attached to the cable 41 is provided on one side of the slider 22 away from the fixed base 11, and by adjusting the magnitude of the pre-tightening force, the vertical dynamic rigidity of the bracket under a vertically balanced state can be adjusted.

[0036] When the cable 41 is passed through the anchor 42 at one end, one slider 22, the cable 41 through-hole in the fixed base 11, the slider 22 of another slide base, and the anchor 42 at the other end in sequence, and 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, which restrains the rebound extension of the elastic arm 31 in the opposite direction, thereby performing a compressive and temporary tightening action on the elastic arm 31.

[0037] The sliding base, elastic arms 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 arms 31 are self-balanced and do not have any effect on the superstructure. When the main bracket is deformed vertically due to vibration, the two ends of the elastic arms 31 slide relative to the concave circular surface, causing the elastic arms 31 to tilt. The tilted and symmetrically arranged elastic arms 31 generate negative stiffness with respect to the superstructure, which and the positive stiffness of the main bracket cancel each other out, creating an overall effect of low stiffness or almost zero stiffness, which can block the transmission of vertical vibrations in most frequency bands to the superstructure. In addition, the pre-tightening force reaction device makes it easy to adjust the magnitude of the pre-tightening force and adjust the vertical dynamic stiffness of the bracket, thereby realizing a low-frequency vibration-damping function with adjustable dynamic stiffness. [Example]

[0038] As shown in Figures 3 and 4, the guide cylinder 21 in this embodiment has a semi-closed cylindrical structure, and 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 opened in the end plate 61 inside the guide cylinder 21. After the push rod 62 is screwed into the tapped hole in the end plate 61, its tip tightens one end of the slider 22 in the guide cylinder 21. Nuts may or may not be placed on both sides of the end plate 61 of the push rod 62. When the compressed elastic arm 31 has a rebound tendency, the slider 22 hinged at its end is stopped by the tip of the push rod 62, which restrains the rebound extension of the elastic arm 31 in the opposite direction, thereby performing the compression and pre-tightening functions on the elastic arm 31.

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

[0040] The installation method for the vibration isolation bracket with adjustable stiffness is as follows: Step 1: After the construction of the necessary substructure assembly 52 is completed, the bracket body 12 is attached to the upper part of the substructure 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, the construction of the upper structure assembly 51 is continued, and at the same time, the subsequent installation of the slide base, the elastic arm 31, and the temporary fastening force reaction device is carried out in parallel; Attach the base 24 to the lower structure assembly 52, connect the slide base and the base 24 with the height adjustment member 23, insert the lower ends of the screws of the height adjustment member 23 into the holes in the top connecting plate of the base 24, and tighten the nuts located on the upper and lower sides of the top connecting plate of the base 24 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 tightened onto 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 levelness 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, respectively, and fitting the convex cylindrical surfaces of the tip sleeves 32 at both ends into the two concave cylindrical surfaces, respectively, 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 connecting 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 superstructure 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 superstructure 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 arm 31. The compression of the elastic arm 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 arm 31 is released. Step 8 includes using a screw torque applying tool to continue screwing the push rods 62 at both ends into the end plates 61, 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, applying a load to the screw torque applying 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 clamp on the elastic arms 31, thereby completing construction. [Example]

[0041] As shown in FIG. 5, in this embodiment, the fixed base 11 and the bracket body 12 are placed horizontally, and four sets of sliding bases are arranged in parallel in the front and back, and the elastic arms 31 are still located on both the left and right sides of the bracket body 12. [Example]

[0042] As shown in Figure 6, in this embodiment, the arrangement of the fixed base 11 and the bracket body 12 is the same as in Examples 1 and 2, that is, arranged vertically, but the number of sliding bases is four, and elastic arms 31 are provided on all four sides of the fixed base 11.

[0043] This device is attached to the vibration isolation layer of various buildings, structures, bridges, equipment, and other structures or instruments, and the attachment position of the main bracket can be determined according to the load distribution of the superstructure, and the slide base, elastic arm 31, and temporary fastening force reaction device can be flexibly arranged on or around the main bracket.

[0044] Here, according to the requirements of the spatial layout, the vibration-isolating bracket body 12 of the main bracket is arranged separately from other parts to form an isolated arrangement means and realize the spatial utilization of the vibration-isolating layer.

[0045] The present invention allows for flexible configuration and easy installation and removal. The deformation and dynamic stiffness can be adjusted throughout the entire construction and operation of the structure. By adjusting the magnitude of the pre-tightening force, the vertical dynamic stiffness of the bracket can be adjusted under the vertical balance state, thereby eliminating deformation errors 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 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, it should be understood that those skilled in the art can modify the technical solutions described in the above embodiments or make equivalent substitutions for part or all of the technical features thereof, and these modifications or equivalent substitutions will not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention. [Explanation of symbols]

[0047] 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 hoops 35 Horizontal connecting spring 41 Cable 42 Anchor 51 Superstructure assembly 52 Undercarriage assembly 61 End plate 62 push rod

Claims

1. An anti-vibration support bracket with adjustable rigidity, comprising: a fixed base; and a sliding base located outside the fixed base, wherein a slider slidably connected to the inside of the sliding base is provided, and an elastic arm is provided between the fixed base and the sliding base, and both ends of the elastic arm are slidably attached to the concave cylindrical surfaces of the fixed base and the slider, respectively, and the sliding base and the fixed base, which are provided along the same axial direction, are connected via a temporary tightening force reaction device.

2. 2. The vibration-damping support bracket with adjustable stiffness according to claim 1, wherein the fixed base is attached between an upper structure assembly and a lower structure assembly, the fixed base and the upper structure assembly are detachably connected, and the fixed base and the lower structure assembly are connected via a bracket body.

3. 3. The vibration-proof support bracket with adjustable rigidity according to claim 2, wherein the sliding base includes a guide cylinder and the slider slidably mounted inside the guide cylinder, a base mounted on 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.

4. 4. The rigidity adjustable vibration-proof support bracket according to claim 3, characterized in that 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 all threaded onto the screw.

5. 5. The vibration-proof support bracket with adjustable rigidity according to claim 4, wherein the elastic arm is formed by stacking one or more leaf springs and connecting them with a hoop, and both ends of the leaf spring are covered with tip sleeves, and the tip sleeves are slidably connected to the concave cylindrical surface of the slider or the fixed base.

6. 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.

7. The vibration-isolating support bracket with adjustable stiffness according to claim 5, wherein a lateral connecting spring is provided between two of the elastic arms located on the same side of the fixed base.

8. 8. The vibration-proof support bracket with adjustable rigidity according to claim 7, characterized in that an end plate is provided at a position within the guide cylinder away from the fixed base, the end plate has a threaded hole, the pre-tightening force reaction device includes a push rod screwed into the threaded hole, and one end of the push rod close to the fixed base is slidably connected to the outer surface of the slider.

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