Lever bridge type hybrid two-stage amplification damper

Abstract

The present invention provides a lever-bridge hybrid two-stage amplification damper, which includes a constraint device. Lever-bridge hybrid amplification devices are symmetrically arranged inside the front and rear ends of the constraint device. A damper is connected between the two lever-bridge hybrid amplification devices. The lever-bridge hybrid amplification device includes a loading control part. The outer end of the loading control part is located outside the constraint device, and the left and right sides of the inner end are symmetrically connected with lever amplification devices respectively. The lever amplification device has fixed pin shafts, first movable pin shafts and second movable pin shafts arranged in a triangular pattern. The fixed pin shaft is hinged to the constraint device, the second movable pin shaft is hinged to the sliding long hole at the inner end of the loading control part, the first movable pin shaft is hinged to one end of a rotating plate, and the other end of the rotating plate is hinged to the damper. The present invention adopts a lever and bridge hybrid amplification mechanism, which can effectively improve the displacement amplification function of the damper and is applicable to external excitation under low-intensity action.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering and construction, in particular to a lever bridge type hybrid two-stage amplification damper. Background Art

[0002] Dampers dissipate earthquake input energy through mechanisms such as metal yielding, solid friction, or viscous damping, thereby achieving seismic reinforcement of the main structure. To fully utilize the damper's energy dissipation capacity, dampers are usually placed in areas with large structural deformation. However, the application of traditional dampers is greatly limited for structures with small lateral deformation, such as cylinders, support frames, and shear walls, or structures with high energy dissipation requirements at small lateral deformations. To overcome the shortcomings of traditional dampers, domestic and foreign scholars have combined the principle of mechanical amplification with dampers and proposed a variety of new damper forms with displacement amplification functions, such as gear mechanisms, connecting rod mechanisms, lever mechanisms, and bridge-type amplification mechanisms. These have achieved good shock absorption effects and effectively improved the working efficiency of the damper.

[0003] However, existing amplifying dampers have a single amplification mechanism, and their layout often requires higher stiffness and strength for the amplifying device under conditions of higher energy consumption. For critical engineering equipment and building structures, existing amplifying dampers still cannot meet the energy consumption requirements of the main structure, especially under low-intensity external excitations, and cannot fully utilize the damper's energy dissipation capacity. This makes it difficult to meet the energy consumption requirements of important buildings and bridges, and it is not suitable for the energy consumption requirements of various types of structures. Therefore, the development of a damper with multiple displacement amplification functions and suitable for different energy dissipation mechanisms has important practical engineering significance. Summary of the Invention

[0004] In order to solve the above technical problems, a lever bridge type hybrid two-stage amplifying damper is provided.

[0005] The technical means adopted in the present invention are as follows:

[0006] A lever-bridge hybrid two-stage amplifying damper includes a restraining device comprising two hollow flat plates fixedly connected by restraining bolts. Lever-bridge hybrid amplifying devices are symmetrically positioned within the front and rear ends of the restraining device, with a damper connected between the two lever-bridge hybrid amplifying devices. The lever-bridge hybrid amplifying device includes a loading control, the outer end of which is located outside the restraining device, and lever amplifying devices symmetrically connected to the left and right sides of the inner end. The lever amplifying device comprises a fixed pin, a first movable pin, and a second movable pin arranged in a triangular pattern. The fixed pin is hinged to the restraining device, and the second movable pin is hinged to a sliding slot at the inner end of the loading control, extending left and right. The first movable pin is hinged to one end of a rotating plate, the other end of which is hinged to the damper. The lever amplifying device and the loading control form a primary lever amplifying mechanism, while the lever amplifying device and the rotating plate form a secondary bridge amplifying mechanism. The distance between the first movable pin and the fixed pin is greater than the distance between the second movable pin and the fixed pin. The preset angle α between the rotating plate and the horizontal line extending to the left and right is less than 45°.

[0007] The damper utilizes a friction damper comprising two outer friction plates, each sandwiching an inner friction plate at its front and rear ends. The outer ends of the inner friction plates are not clamped by the outer friction plates and are hingedly connected to the two adjacent rotating plates. The inner ends of the inner friction plates are clamped by the outer friction plates and are provided with a hollow, forward-and-backward-extending slideway. At least one pre-tightening bolt passes through the outer friction plates and the slideway to secure the outer and inner friction plates. The outer friction plates have protrusions on either side. After the outer friction plates clamp the inner friction plate, the protrusions of the outer friction plates cooperate to wrap around both sides of the inner friction plate.

[0008] The damper may also be a viscous damper, a metal damper, a viscoelastic damper or a composite energy dissipation mechanism damper.

[0009] Compared with the prior art, the present invention has the following advantages:

[0010] 1. The present invention adopts a two-stage amplification function, which reduces the requirements for the stiffness and strength of the connecting components at each level. The energy consumption demand of the damper can be adjusted through the two-stage amplification coefficient;

[0011] 2. The present invention adopts a lever and bridge hybrid amplification mechanism, which can effectively enhance the displacement amplification function of the damper and is suitable for external excitation under low-intensity action;

[0012] 3. The damper in the present invention can adopt a friction damper, or can be replaced with a viscous damper, a metal damper, a viscoelastic damper or a composite energy dissipation mechanism damper, and is applicable to a variety of dampers.

[0013] Based on the above reasons, the present invention can be widely promoted in the fields of civil engineering and construction, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic structural diagram of the lever bridge type hybrid two-stage amplification damper in the specific embodiment of the present invention.

[0016] Figure 2 It is a schematic structural diagram of the lever bridge type hybrid two-stage amplification damper after removing one flat plate in the specific embodiment of the present invention.

[0017] Figure 3 It is a schematic structural diagram of the flat plate in the specific embodiment of the present invention.

[0018] Figure 4 It is a schematic structural diagram of the loading control in the specific embodiment of the present invention.

[0019] Figure 5 It is a schematic structural diagram of the lever amplification device in the specific embodiment of the present invention.

[0020] Figure 6 It is a schematic structural diagram of the rotating plate in the specific embodiment of the present invention.

[0021] Figure 7 It is a schematic structural diagram of the outer friction plate in the specific embodiment of the present invention.

[0022] Figure 8 It is a schematic structural diagram of the inner friction plate in the specific embodiment of the present invention.

[0023] Figure 9 It is a schematic diagram of the amplification coefficient of the first-stage amplification lever mechanism in the specific embodiment of the present invention.

[0024] Figure 10 It is a schematic diagram of the included angle of the rotating plate in the specific embodiment of the present invention.

[0025] Figure 11 It is a schematic diagram of the second-stage amplification in the specific embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. The description of at least one exemplary embodiment below is actually only illustrative and in no way restricts the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0029] Unless otherwise specifically stated, the relative arrangements, numerical expressions and values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for the sake of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary instructions, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention: the orientation terms "inner, outer" refer to the inside and outside relative to the contour of each component itself.

[0031] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "upper...", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation other than the orientation described in the figure for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0032] In addition, it should be noted that using words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present invention.

[0033] As Figures 1 to 11 shown, the lever bridge type hybrid two-stage amplification damper includes a restraint device. As Figure 3 shown, the restraint device includes two hollow flat plates 1. The flat plates are provided with a plurality of restraint bolt holes 101 for restraint bolts to pass through and shaft holes 102 for the fixed pin shafts 202 mentioned below to be rotatably connected. The two flat plates 1 are fixedly connected after the restraint bolts pass through the restraint bolt holes 101.

[0034] Lever bridge type hybrid amplification devices are symmetrically arranged inside the front and rear ends of the restraint device. A damper is connected between the two lever bridge type hybrid amplification devices. The lever bridge type hybrid amplification device includes a loading control 3. As Figure 4As shown, the loading control 3 includes a loading rod 301. The outer end of the loading rod is located outside the constraint device, and the inner end has an extension portion extending left and right. Grooves 303 and sliding long holes 302 extending left and right are respectively provided at the left and right ends of the extension portion. Lever amplification devices 2 are symmetrically connected to the left and right sides of the inner end respectively.

[0035] As Figure 5 shown, the lever amplification device 2 is in the shape of a triangular plate, and fixed pin shafts 202, first movable pin shafts 201, and second movable pin shafts 203 are respectively provided at its three corners. The distance between the first movable pin shaft 201 and the fixed pin shaft 202 is greater than the distance between the second movable pin shaft 203 and the fixed pin shaft 202.

[0036] The second movable pin shaft 203 is hinged to the sliding long hole 302 at the inner end of the loading control 3, and the part of the lever amplification device at the position of the second movable pin shaft 203 is located in the groove 303. The first movable pin shaft 201 is hinged to one end of the rotating plate 6, and the other end of the rotating plate 6 is hinged to the damper; the preset angle α between the rotating plate and the horizontal line extending left and right is less than 45°. A first-level lever amplification mechanism is formed between the lever amplification device 2 and the loading control 3, and a second-level bridge amplification mechanism is formed between the lever amplification device 2 and the rotating plate 6. The first-level amplification adopts the working principle of a lever. As Figure 9 shown, the amplification coefficient R1 = L AB / L BC (L AB is the distance between the first movable pin shaft 201 and the fixed pin shaft 202, and L BC is the distance between the second movable pin shaft 203 and the second fixed pin shaft 202). The second-level amplification adopts the working principle of a bridge amplification mechanism. As Figure 10 shown, as long as α < 45°, displacement amplification can be completed. For the working principle, refer to the patent "A Bridge-Type Self-Resetting Support with Energy Dissipation and Amplification Function" (CN113389289B).

[0037] The damper adopts a friction damper, which includes two outer friction plates 5 symmetrically arranged up and down and two inner friction plates 4 symmetrically arranged left and right. The outer friction plates 5 and the inner friction plates 4 both extend back and forth; as Figure 7 shown, protrusions 501 are respectively provided on the left and right sides of the outer friction plate 5, and a plurality of pre-tightening bolt holes 501 are provided on the outer friction plate 5; as Figure 8As shown in the figure, one end of the inner friction plate 4 has two rotating pin shafts 402, and the other end has a slideway 401 that is hollow and extends in the front-rear direction; the two outer friction plates 5 are symmetrically placed up and down. One end of the two inner friction plates 4 with the slideway 401 is clamped by the two outer friction plates 5, and the end of the inner friction plate 4 with the rotating pin shafts 402 is not clamped by the outer friction plates 5. The inner friction plate 4 is hinged to the rotating plate 6 through the rotating pin shafts 402; the pre-tightening bolts pass through the pre-tightening bolt holes 501 of the two outer friction plates 5 and the slideway 401 of the inner friction plate 4 to clamp the inner friction plate 4 and the outer friction plate 5 together. The two protrusions 501 wrap the inner friction plate 4.

[0038] The damper can also be a viscous damper, a metal damper, a viscoelastic damper, a composite energy dissipation mechanism damper, etc.

[0039] Working mechanism: During loading, the loading control 3 drives the lever amplification device to rotate around the fixed pin shaft 202. The second movable pin shaft 203 can slide in the sliding long hole 302 of the loading control 3, and the first movable pin shaft 201 drives the rotating plate 6 to displace, thereby driving the two connected inner friction plates 4 to generate relative displacement and making them dissipate energy through friction within the outer friction plates 5.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Lever bridge type hybrid two-stage amplified damper, characterized in that, It includes a restraint device, and lever-bridge type hybrid amplification devices are symmetrically arranged inside the front and rear ends of the restraint device. A damper is connected between the two lever-bridge type hybrid amplification devices. The lever-bridge type hybrid amplification device includes a loading control part. The outer end of the loading control part is located outside the restraint device, and lever amplification devices are symmetrically connected to the left and right sides of the inner end respectively. The lever amplification device has fixed pin shafts, first movable pin shafts and second movable pin shafts arranged in a triangular shape. The fixed pin shaft is hinged to the restraint device. The second movable pin shaft is hinged to a sliding long hole at the inner end of the loading control part. The sliding long hole extends left and right. The first movable pin shaft is hinged to one end of a rotating plate. The other end of the rotating plate is hinged to the damper. A primary lever amplification mechanism is formed between the lever amplification device and the loading control part. A secondary bridge amplification mechanism is formed between the lever amplification device and the rotating plate. And the distance between the first movable pin shaft and the fixed pin shaft is greater than the distance between the second movable pin shaft and the fixed pin shaft. The preset angle α between the rotating plate and the horizontal line extending left and right is less than 45°.

2. The lever bridge type hybrid two-stage amplification damper according to claim 1, wherein, The damper adopts a friction damper, which includes two outer friction plates. Inner friction plates are respectively clamped inside the front and rear ends of the two outer friction plates. The outer ends of the inner friction plates are not clamped by the two outer friction plates and are hinged to the two rotating plates close to them. The inner ends of the inner friction plates are clamped by the two outer friction plates, and a slideway that is hollow and extends in the front and rear directions is arranged. At least one pre-tightening bolt passes through the two outer friction plates and the slideway to fasten the two outer friction plates and the inner friction plates.

3. The lever bridge type hybrid two-stage amplification damper according to claim 2, wherein, The two sides of the outer friction plate have protrusions. After the two outer friction plates clamp the inner friction plate, the protrusions of the two outer friction plates cooperate to wrap the two sides of the inner friction plate.

4. The lever bridge type hybrid two-stage amplified damper according to claim 1 or 2, characterized in that, The restraint device includes two hollow flat plates, and the two flat plates are fixedly connected by restraint bolts.

5. The lever bridge type hybrid two-stage amplification damper according to claim 1, characterized in that The damper is a viscous damper, a metal damper, a viscoelastic damper or a composite energy dissipation mechanism damper.

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