Self-centering friction damper

Abstract

The application provides a self-resetting friction damper, which comprises a cylinder body and a guide rod penetrating into the cylinder body, a first piston piece, a first elastic piece and a second piston piece are arranged in the inner cavity of the cylinder body and the guide rod penetrates through the first piston piece, the first elastic piece and the second piston piece in sequence; the cylinder body is provided with a first inner friction plate and a second inner friction plate which abut against the inner side wall of the cylinder body, the first inner friction plate comprises a first protruding part which is clamped between the first piston piece and the first elastic piece, and the second inner friction plate comprises a second protruding part which is clamped between the second piston piece and the first elastic piece; the guide rod is provided with a first limiting part and a second limiting part, the first limiting part abuts against the side of the first piston piece which is away from the first elastic piece, and the second limiting part abuts against the side of the second piston piece which is away from the first elastic piece. The first elastic piece is compressed when the guide rod moves in any axial direction, so that the self-resetting is realized, and the damping energy consumption is realized by using the friction force.

Description

Technical Field

[0001] This invention relates to the field of construction, and more specifically to a self-resetting friction damper. Background Technology

[0002] Passive structural control technology is an important means of reducing structural dynamic response and improving structural safety. The basic principle of passive structural control is to dissipate structural vibration energy by installing energy-dissipating control devices such as dampers on the structure, thereby controlling the structural dynamic response and improving structural safety. Because passive structural control technology does not require additional external energy and is simple to construct, inexpensive, and highly reliable, it has been widely used in practical engineering.

[0003] Friction dampers are a commonly used energy dissipation and vibration reduction device, characterized by low cost and simple construction. A friction damper typically consists of multiple steel plates and friction pads. When subjected to external forces, the steel plates and friction pads move relative to each other, and the energy is dissipated through the friction generated by this relative motion.

[0004] After a major earthquake exceeding the design benchmark, a structure may exhibit significant residual deformation, which can severely impact its safety. Excessive lateral and residual deformation can even lead to structural collapse. Therefore, various self-resetting devices have been developed to improve the structure's self-resetting capability and reduce residual deformation.

[0005] Currently, the industry urgently needs a new type of damper that not only has excellent energy dissipation capabilities but also self-resetting capabilities, and facilitates later maintenance and replacement. Designing an open-assembly self-resetting friction damper that simultaneously possesses energy dissipation and self-resetting capabilities, while also being easy to maintain and replace, has long been a challenging engineering problem. Summary of the Invention

[0006] The purpose of this invention is to provide a self-resetting friction damper. By combining the first elastic element and other components in different ways, the required bearing capacity, self-resetting force and deformation amount of the component can be obtained. When the internal components are squeezed together, the deformation of the first elastic element generates a reverse elastic force, so that the first elastic element will be compressed in any axial direction of the guide rod, thereby achieving self-resetting. At the same time, the friction force is used to achieve damping and energy dissipation, so that this invention can play a stable and efficient energy dissipation role.

[0007] To solve the above-mentioned technical problems, the present invention provides a self-resetting friction damper, including a cylinder and a guide rod inserted into the cylinder. A first piston, a first elastic member, and a second piston are disposed within the inner cavity of the cylinder for the guide rod to pass through sequentially. The guide rod is axially movable relative to the cylinder, the first piston, the first elastic member, and the second piston. A first inner friction plate and a second inner friction plate are disposed on the inner wall of the cylinder, abutting against the inner wall of the cylinder. The first inner friction plate includes a first protrusion protruding towards the guide rod, and the second inner friction plate includes a second protrusion protruding towards the guide rod. One end of the first elastic member abuts against the side of the first protrusion, and the other end of the first elastic member abuts against the side of the first protrusion. The second protrusion abuts against the side of the first piston member, one end of the first piston member abuts against the inner wall of the cylinder, and the other end of the first piston member abuts against the side of the first protrusion. The second piston member abuts against the inner wall of the cylinder and the other end of the second piston member abuts against the side of the second protrusion. The guide rod is provided with a first limiting part and a second limiting part. The first limiting part abuts against the end of the first piston member away from the first elastic member, and the second limiting part abuts against the end of the second piston member away from the first elastic member. The first limiting part can move away from the first piston member along the axial direction of the guide rod, and the second limiting part can move away from the second piston member along the axial direction of the guide rod.

[0008] Optionally, the cylinder body includes a first end component, a baffle, and a second end component, with the guide rod passing through the first end component to enter the cylinder body; one end of the baffle is connected to the first end component, and the other end of the baffle is connected to the second end component.

[0009] Optionally, it also includes a first preload and a second preload, wherein the first preload is inserted into the cylinder body and the second preload is also inserted into the cylinder body, the first preload clamps the side wall of the cylinder body and the first inner friction plate, and the second preload clamps the side wall of the cylinder body and the second inner friction plate.

[0010] Optionally, the first pre-tensioning member passes through the first inner friction plate, and the second pre-tensioning member passes through the second inner friction plate. The first inner friction plate has a first sliding groove hole on its surface, and the second inner friction plate has a second sliding groove hole on its surface. The first pre-tensioning member can move relative to the first inner friction plate using the first sliding groove hole, and the second pre-tensioning member can move relative to the second inner friction plate using the second sliding groove hole.

[0011] Optionally, the first pretensioner and / or the second pretensioner can extend or retract axially.

[0012] Optionally, the first piston member includes a first piston plate and a first flange plate connected to the first piston plate, the first piston plate and the first flange plate being set at a preset angle; the second piston member includes a second piston plate and a second flange plate connected to the second piston plate, the second piston plate and the second flange plate being set at a preset angle; the guide rod passes through the first piston plate and the second piston plate to pass through the first piston member and the second piston member; a third inner friction plate is sandwiched between the first flange plate and the first inner friction plate, and a fourth inner friction plate is sandwiched between the second flange plate and the second inner friction plate; a first preload member passes through and clamps the third inner friction plate and the first flange plate, and a second preload member passes through and clamps the fourth inner friction plate and the second flange plate; a third sliding groove hole is formed on the first flange plate, and a fourth sliding groove hole is formed on the second flange plate; the first preload member can move relative to the first flange plate using the third sliding groove hole, and the second preload member can move relative to the second flange plate using the fourth sliding groove hole.

[0013] Optionally, the first preload member may include a first preload portion, a second preload portion, and a first preload rod. One end of the first preload rod is connected to the first preload portion, and the other end of the first preload rod is connected to the second preload portion. The second preload member includes a third preload portion, a fourth preload portion, and a second preload rod. One end of the second preload rod is connected to the third preload portion, and the other end of the second preload rod is connected to the fourth preload portion. The first and third preload portions are located outside the cylinder body, and the second and fourth preload portions are located inside the cylinder body. At least one of the following is provided: between the first preload portion and the outer wall of the cylinder body, between the second preload portion and the first flange plate, between the third preload portion and the outer wall of the cylinder body, and between the fourth preload portion and the second flange plate.

[0014] Optionally, the cylinder body includes a first end component, a baffle, and a second end component. The first end component includes a first end plate and a third flange plate, and the second end component includes a second end plate and a fourth flange plate. The guide rod passes through the first end plate to enter the cylinder body. The sidewall of the cylinder body is composed of the baffle. The first pre-tensioning member passes through and clamps the first flange plate and the baffle, and the second pre-tensioning member passes through and clamps the second flange plate and the baffle.

[0015] Optionally, one end of the baffle abuts against the first end plate, and the other end of the baffle abuts against the second end plate.

[0016] Optionally, it also includes a first outer friction plate, a second outer friction plate, a third pre-tensioning member, and a fourth pre-tensioning member. The third pre-tensioning member passes through the first outer friction plate, the side wall of the cylinder, and the first inner friction plate sequentially from the outside to the inside. The fourth pre-tensioning member passes through the second outer friction plate, the side wall of the cylinder, and the second inner friction plate sequentially from the outside to the inside. The third pre-tensioning member is fixedly connected to the first outer friction plate and the first inner friction plate so that the third pre-tensioning member, the first outer friction plate, and the first inner friction plate move together. The fourth pre-tensioning member is fixedly connected to the second outer friction plate and the second inner friction plate so that the fourth pre-tensioning member, the second outer friction plate, and the second inner friction plate move together. A fifth sliding groove and a sixth sliding groove are provided on the side wall of the cylinder. The third pre-tensioning member can move relative to the side wall of the cylinder using the fifth sliding groove, and the fourth pre-tensioning member can move relative to the side wall of the cylinder using the sixth sliding groove.

[0017] The self-resetting friction damper provided by this invention has the following beneficial effects:

[0018] When the guide rod moves towards the first piston relative to the cylinder body, the second limiting part moves with the guide rod towards the first piston. The second limiting part pushes the second piston towards the first piston. Because the second piston abuts against the second protrusion, the second internal friction plate is pushed towards the first elastic member, which is then pushed towards the first piston by the second protrusion. Therefore, the first elastic member pushes the first protrusion, which in turn pushes the first piston. Because the first piston is blocked by the inner wall of the first cylinder body, it is restricted and cannot move. At this time, the guide rod can still continue to move towards the first piston. The first and second protrusions then compress the first elastic member, causing it to deform elastically. This elastic deformation generates a force that applies to the second protrusion, and this force gradually increases as the second piston moves, pushing it away from the first piston, thus achieving self-resetting. When the guide rod moves towards the second piston relative to the cylinder, the first and second protrusions will similarly compress the first elastic element, causing it to deform elastically. This deformation generates a spring force on the first protrusion, which gradually increases as the first piston moves, pushing the first protrusion away from the second piston and thus achieving self-resetting. This invention integrates self-resetting, load-bearing, and energy-dissipating capabilities through its structural design. Regardless of whether it is under compression or tension, the first elastic element remains under compression, utilizing the spring force generated by the compression to provide load-bearing capacity and self-resetting capability. Friction energy dissipation is achieved through the first and second internal friction plates. All components can be standardized and manufactured in a factory, enabling industrial production. The manufacturing and installation are simple, making it highly valuable for widespread application. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of a self-resetting friction damper provided in an embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional view of a self-resetting friction damper provided in an embodiment of the present invention under tension.

[0021] Figure 3 A cross-sectional view of a self-resetting friction damper under pressure according to an embodiment of the present invention;

[0022] The attached figures are labeled as follows:

[0023] 11-Guide rod; 111-First limiting part; 112-Second limiting part; 121-First piston plate; 122-First flange plate; 131-Second piston plate; 132-Second flange plate; 141-First end plate; 142-Third flange plate; 151-Second end plate; 152-Fourth flange plate; 16-Baffle; 171-First elastic element; 172-Second elastic element;

[0024] 210 - Fifth sliding groove hole; 211 - First inner friction plate; 212 - Third pre-tightening component; 213 - First outer friction plate;

[0025] 220 - Sixth sliding groove hole; 221 - Second inner friction plate; 222 - Fourth pre-tightening component; 223 - Second outer friction plate;

[0026] 214 - Third inner friction plate; 224 - Fourth inner friction plate;

[0027] 31-First pre-tightening component; 310-First pre-tightening rod; 311-First pre-tightening part; 312-Second pre-tightening part; 32-Seventh sliding groove hole; 33-First sliding groove hole; 34-Third sliding groove hole;

[0028] 41-Second preload component; 410-Second preload rod; 411-Third preload part; 412-Fourth preload part; 42-Eighth sliding groove hole; 43-Second sliding groove hole; 44-Fourth sliding groove hole;

[0029] 51-First connector; 52-Second connector. Detailed Implementation

[0030] To make the objectives, advantages, and features of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clarify the explanation of the embodiments of this invention. Furthermore, the structures shown in the drawings are often part of the actual structures. In particular, different figures may emphasize different aspects and may sometimes use different scales.

[0031] It should be understood that when an element or layer is referred to as "on" or "connected to" other elements or layers, it may be directly on or connected to other elements or layers, or may include intervening elements or layers. Conversely, when an element is referred to as "directly on" or "directly connected to" other elements or layers, intervening elements or layers are not included. Although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this invention, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion. Spatial relation terms such as "below," "under," "below," "above," "on top," "above," etc., may be used herein for convenience of description to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatial relational terms are intended to also include different orientations of the devices in use and operation. For example, if the devices in the figures are flipped, then elements or features described as “below,” “under,” or “below” will be oriented “on” other elements or features. Devices may be oriented additionally (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly. The terminology used herein is intended only to describe particular embodiments and is not intended to limit the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “comprising” is used to identify the inclusion of features, steps, operations, elements, and / or components, but does not exclude the inclusion or addition of one or more other features, steps, operations, elements, components, and / or groups. When used herein, the terms “and / or” include any and all combinations of the associated listed items.

[0032] The purpose of this invention is to provide a self-resetting friction damper. By combining the first elastic element and other components in different ways, the required bearing capacity, self-resetting force and deformation amount of the component can be obtained. When the internal components are squeezed together, the deformation of the first elastic element generates a reverse elastic force. The friction damping effect is generated by the combination of various friction plates, so that this invention can exert a stable and efficient energy dissipation capacity.

[0033] To achieve the above objectives, the present invention provides a self-resetting friction damper, please refer to... Figure 1 , Figure 1 This is a cross-sectional view of a self-resetting friction damper provided in an embodiment of the present invention. Figure 1As shown, the self-resetting friction damper includes a cylinder and a guide rod 11 that passes through the cylinder. A first piston, a first elastic element 171, and a second piston are provided within the inner cavity of the cylinder for the guide rod 11 to pass through sequentially. The guide rod 11 is axially movable relative to the cylinder, the first piston, the first elastic element 171, and the second piston. A first inner friction plate 211 and a second inner friction plate 221 are provided on the inner wall of the cylinder, abutting against the inner wall of the cylinder. The first inner friction plate 211 includes a first protrusion protruding towards the guide rod 11, and the second inner friction plate 221 includes a second protrusion protruding towards the guide rod 11. One end of the first elastic element 171 abuts against the side of the first protrusion, and the other end of the first elastic element 171 abuts against the second protrusion. The first piston abuts against the side of the first protrusion, one end of the first piston abuts against the inner wall of the cylinder, and the other end of the first piston abuts against the side of the first protrusion. The second piston abuts against the inner wall of the cylinder, and the other end of the second piston abuts against the side of the second protrusion. The guide rod 11 is provided with a first limiting part 111 and a second limiting part 112. The first limiting part 111 abuts against the side of the first piston away from the first elastic member 171, and the second limiting part 112 abuts against the side of the second piston away from the first elastic member 171. The first limiting part 111 can move away from the first piston along the axial direction of the guide rod 11, and the second limiting part 112 can move away from the second piston along the axial direction of the guide rod 11. Therefore, the present invention utilizes the first elastic element 171 to provide the self-resetting friction damper with self-resetting capability and a certain load-bearing capacity and energy dissipation capability; thus, regardless of whether the present invention is under compression or tension, the first elastic element 171 is under compression, and the elastic force generated by the compression of the first elastic element 171 provides load-bearing capacity and self-resetting capability; and the friction energy dissipation effect is achieved through the first inner friction plate 211 and the second inner friction plate 221; all components of the present invention can be standardized and processed in the factory, enabling industrial production, simple manufacturing and installation, and has broad application value.

[0034] For details, please refer to Figure 2 and Figure 3 ,in, Figure 2 This is a cross-sectional view of a self-resetting friction damper provided in an embodiment of the present invention under tension. Figure 3 This is a cross-sectional view of a self-resetting friction damper provided in an embodiment of the present invention under pressure. Figure 2As shown, when the self-resetting friction damper provided by the present invention is in a tensile state, the guide rod 11 moves to the left. The second limiting part 112, due to the fixed constraint of the guide rod 11 along its length direction (i.e., axial direction), moves towards the first piston member along with the guide rod 11. The second limiting part 112 pushes the second piston member towards the first piston member. Since the second piston member abuts against the second protrusion, the second inner friction plate 221 is also pushed towards the first elastic member 171, which is then pushed towards the first piston member by the second protrusion. Furthermore, since the end of the first elastic member 171 that does not abut against the second protrusion abuts against the first protrusion, the first elastic member 171 pushes the first protrusion, which in turn pushes the first piston member. Because the first piston is blocked by abutting against the inner wall of the first cylinder, the first piston is restricted and constrained so that it cannot move. However, the first limiting part 111 can still move away from the first piston relative to the first piston along the axial direction of the guide rod 11. At this time, the guide rod 11 can still continue to move towards the first piston. Then, the second piston is still pushed by the second limiting part 112 and continues to move towards the first piston. At this time, the first protrusion and the second protrusion will compress the first elastic member 171, and the first elastic member 171 will undergo elastic deformation under pressure.

[0035] After the first elastic member 171 undergoes elastic deformation, it generates an elastic force toward the second protrusion. As the second piston moves, the elastic force gradually increases. The second protrusion is subjected to an elastic restoring force toward the second piston, which pushes the second piston to move away from the first piston. The second limiting part 112, due to its fixed constraint with the guide rod 11, drives the guide rod 11 to move together in the same direction until the force is balanced, thereby achieving self-resetting.

[0036] like Figure 3As shown, when the self-resetting friction damper provided by the present invention is in a compressed state, that is, when the guide rod 11 moves to the right, the first limiting part 111, due to the fixed constraint of the guide rod 11 along its length direction (i.e., axial direction), moves towards the second piston member along with the guide rod 11. The first limiting part 111 pushes the first piston member towards the second piston member, and the first piston member is pushed towards the first elastic member 171. Since the first piston member abuts against the first protrusion, the first inner friction plate 211 is also driven to be pushed towards the first elastic member 171, and the first elastic member 171 is pushed towards the second piston member by the first protrusion. Furthermore, since the end of the first elastic member 171 that does not abut against the first protrusion abuts against the second protrusion, the first elastic member 171 pushes the second protrusion, and the second protrusion pushes the second piston member. Because the second piston is blocked by abutting against the inner wall of the first cylinder, the second piston is restricted and constrained so that it cannot move. At this time, the second limiting part 112 can still move away from the second piston along the axial direction of the guide rod 11. Therefore, the guide rod 11 can still continue to move towards the second piston. Then, the first piston is still pushed by the first limiting part 111 and continues to move towards the second piston. At this time, the first protrusion and the second protrusion will compress the first elastic member 171, and the first elastic member 171 will undergo elastic deformation under pressure.

[0037] After the first elastic member 171 undergoes elastic deformation, it generates an elastic force towards the first protrusion. As the first piston moves, the elastic force gradually increases. The first protrusion is subjected to an elastic restoring force in the direction of the first piston, which in turn pushes the first protrusion to move away from the second piston. The first limiting part 111, due to its fixed constraint with the guide rod 11, drives the guide rod 11 to move together in the same direction until the force is balanced, thereby achieving self-resetting.

[0038] To realize an open self-resetting friction damper, the cylinder body may include a first end component, a baffle 16, and a second end component. One end of the baffle 16 is connected to the first end component, and the other end of the baffle 16 is connected to the second end component. The guide rod 11 passes through the first end component and enters the cylinder body. Preferably, the first end component and the second end component can be detachably connected to the baffle 16, including but not limited to threaded connections, or as... Figures 1 to 3 The two parts are relatively fixed after being connected to each other. This open and detachable connection will further facilitate industrial production, installation, disassembly and maintenance.

[0039] It should be noted that the contact between the first inner friction plate 211 and the second inner friction plate 221 and the inner wall of the cylinder can be achieved in various ways. For example, the side of the first piston member can abut against the first inner friction plate 211, and the side of the second piston member can abut against the second inner friction plate 221. It can even be achieved through magnetic adsorption, etc. Please refer to [reference needed]. Figures 1 to 3 In one exemplary embodiment, the self-resetting friction damper may further include a first preload member 31 and a second preload member 41. The first preload member 31 is inserted into the cylinder body, and the second preload member 41 is also inserted into the cylinder body. The first preload member 31 clamps the side wall of the cylinder body and the first inner friction plate 211, and the second preload member 41 clamps the side wall of the cylinder body and the second inner friction plate 221. This clamping mechanism also allows for contact between the first inner friction plate 211 and the second inner friction plate 221 and the inner wall of the cylinder body.

[0040] Please continue to refer to this. Figures 1 to 3 When using the first preload member 31 and the second preload member 41 to clamp the first inner friction plate 211 and the second inner friction plate 221, the first preload member 31 can pass through the first inner friction plate 211, and the second preload member 41 can pass through the second inner friction plate 221. The first inner friction plate 211 has a first sliding groove hole 33, and the second inner friction plate 221 has a second sliding groove hole 43. The first preload member 31 can move relative to the first inner friction plate 211 through the first sliding groove hole 33, and the second preload member 41 can move relative to the second inner friction plate 221 through the second sliding groove hole 43. In this way, when the first preload member 31 and the second preload member 41 pass through and clamp the first inner friction plate 211 and the second inner friction plate 221, the first inner friction plate 211 and the second inner friction plate 221 can move relative to the side wall of the cylinder to generate friction. It should be understood that the first pre-tightening member 31 can achieve clamping without passing through the first inner friction plate 211, and the second pre-tightening member 41 can also achieve clamping without passing through the second inner friction plate 221. Furthermore, the presence of the first sliding groove hole 33 and the second sliding groove hole 43 enables the first pre-tightening member 31 and the second pre-tightening member 41 to also play a certain limiting role during the movement of the first inner friction plate 211 and the second inner friction plate 221, thereby strengthening the overall integrity of the self-resetting friction damper.

[0041] Preferably, the first pretensioner 31 and / or the second pretensioner 41 are capable of axial extension and retraction. The axial extension and retraction of the first pretensioner 31 and the second pretensioner 41 can be achieved in various ways. Please refer to... Figures 1 to 3In an exemplary embodiment, the first preload 31 and the second preload 41 can be bolts, consisting of a nut, a threaded rod, and a bolt. The threaded rod and bolt are connected by threads. By rotating the nut and bolt relative to each other, the bolt is tightened or loosened, thereby achieving axial expansion and contraction of the first preload 31 and the second preload 41. In this case, the first preload 31 and the second preload 41 can be understood as part of a bolt composed of a nut, a bolt, and the threaded rod between them. Other forms can also be used, such as the first preload 31 and the second preload 41 being adjustable telescopic structures, etc., which will not be elaborated here. This configuration allows control over the degree to which the first preload 31 and the second preload 41 clamp the first inner friction plate 211 and the second inner friction plate 221, thereby controlling the magnitude of the frictional force generated by the first inner friction plate 211 and the second inner friction plate 221 during movement.

[0042] Please continue to refer to this. Figures 1 to 3 Preferably, the first piston member includes a first piston plate 121 and a first flange plate 122 connected to the first piston plate 121, the first piston plate 121 and the first flange plate 122 being set at a preset angle; the second piston member includes a second piston plate 131 and a second flange plate 132 connected to the second piston plate 131, the second piston plate 131 and the second flange plate 132 being set at a preset angle; preferably, the first flange plate 122 can extend toward the first elastic member 171, and the second flange plate 132 can extend toward the first elastic member 171; the guide rod 11 passes through the first piston plate 121 and the second piston plate 131 to pass through the first piston member and the second piston member; A third inner friction plate 214 is sandwiched between the first flange plate 122 and the first inner friction plate 211, and a fourth inner friction plate 224 is sandwiched between the second flange plate 132 and the second inner friction plate 221; the first pre-tensioning member 31 passes through and clamps the third inner friction plate 214 and the first flange plate 122, and the second pre-tensioning member 41 passes through and clamps the fourth inner friction plate and the second flange plate 132; a third sliding groove hole 34 is opened on the first flange plate 122, and a fourth sliding groove hole 44 is opened on the second flange plate 132; the first pre-tensioning member 31 can move relative to the first flange plate 122 through the third sliding groove hole 34, and the second pre-tensioning member 41 can move relative to the second flange plate 132 through the fourth sliding groove hole 44.

[0043] With this configuration, the first pretensioner 31 can restrict the movement of the third inner friction plate 214, and the second pretensioner 41 can restrict the movement of the fourth inner friction plate 224. However, due to the presence of the first sliding hole 33 and the third sliding hole 34, the first flange plate 122 and the first inner friction plate 211 will slide relative to the third inner friction plate 214. Due to the presence of the second sliding hole 43 and the third sliding hole 34, the second flange plate 132 and the second inner friction plate 221 will slide relative to the fourth inner friction plate 224, thereby further generating friction and increasing the friction energy dissipation effect.

[0044] Please continue to refer to this. Figures 1 to 3 Specifically, the first pretensioning member 31 may include a first pretensioning part 311, a second pretensioning part 312, and a first pretensioning rod 310. One end of the first pretensioning rod 310 is connected to the first pretensioning part 311, and the other end of the second pretensioning rod is connected to the second pretensioning part 312. The second pretensioning member 41 includes a third pretensioning part 411, a fourth pretensioning part 412, and a second pretensioning rod 410. One end of the second pretensioning rod 410 is connected to the third pretensioning part 411, and the other end of the second pretensioning rod is connected to... The fourth preload portion 412 is connected. The first preload portion 311 and the third preload portion 411 are outside the cylinder body, and the second preload portion 312 and the fourth preload portion 412 are inside the cylinder body. At least one of the following is provided: between the first preload portion 311 and the outer wall of the cylinder body; between the second preload portion 312 and the first flange plate 122; between the third preload portion 411 and the outer wall of the cylinder body; and between the fourth preload portion 412 and the second flange plate 132. Please refer to [reference needed]. Figures 1 to 3 ,Depend on Figures 1 to 3 Therefore, the second elastic element 172 can be provided between the first pre-tightening part 311 and the outer wall of the cylinder, between the second pre-tightening part 312 and the first flange plate 122, between the third pre-tightening part 411 and the outer wall of the cylinder, and between the fourth pre-tightening part 412 and the second flange plate 132. The function of the second elastic element 172 is to use elastic force to assist the first pre-tightening part 31 and the second pre-tightening part 41 in squeezing the first inner friction plate 211 and the second inner friction plate 221, thereby controlling the magnitude of the friction force generated by the first inner friction plate 211 and the second inner friction plate 221 during movement.

[0045] It should be added that, as Figures 1 to 3As shown, the first limiting part 111 can move away from the first piston along the axial direction of the guide rod 11, and the second limiting part 112 can move away from the second piston along the axial direction of the guide rod 11. Specifically, in the initial state (i.e., without tension or compression), the first limiting part 111 can abut against the side of the first piston away from the first elastic member 171, and the first limiting part 111 passes through the cylinder sidewall. Thus, when the first limiting part 111 moves away from the first elastic member 171 along the guide rod 11 (i.e., to the left), the first piston is restricted from movement due to being abutted by the cylinder, but the first limiting part 111 can continue to move because it passes through the cylinder sidewall. When the second piston member includes the second piston plate 131 and the second flange plate 132, the second piston plate 131 and the second flange plate 132 form an inner cavity. The second limiting part 112 can be provided in the inner cavity. Thus, when the second limiting part 112 moves away from the first elastic member 171 with the guide rod 11 (i.e., moves to the right), the second flange plate 132 of the second piston member is restricted from moving due to being abutted by the cylinder body. However, the second limiting part 112 has not yet contacted the cylinder body and can continue to move.

[0046] Please continue to refer to this. Figures 1 to 3 Preferably, the first end component includes a first end plate 141 and a third flange plate 142 respectively connected to both ends of the first end plate 141; the second end component includes a second end plate 151 and a fourth flange plate 152 respectively connected to both ends of the second end plate 151; the guide rod 11 passes through the first end plate 141 to enter the cylinder body; the side wall of the cylinder body is composed of the baffle 16; the first pre-tensioning member 31 passes through and clamps the first flange plate 122 and the baffle 16; the second pre-tensioning member 41 passes through and clamps the second flange plate 132 and the baffle 16.

[0047] This configuration enables a detachable connection of the self-resetting friction damper via the first preload member 31. Furthermore, one end of the baffle 16 abuts against the first end plate 141, and the other end of the baffle 16 abuts against the second end plate 151. This configuration further restricts the relative movement between the baffle 16 and the first and second end components, preventing any impact on frictional energy dissipation.

[0048] Please continue to refer to this. Figures 1 to 3Preferably, the self-resetting friction damper further includes a first outer friction plate 213, a second outer friction plate 223, a third preload member 212, and a fourth preload member 222. The first outer friction plate 213 and the second outer friction plate 223 are both located on the outer side of the inner cavity of the cylinder. The third preload member 212 passes through the first outer friction plate 213, the side wall of the cylinder, and the first inner friction plate 211 in sequence from the outside to the inside. The fourth preload member 222 passes through the second outer friction plate 223, the side wall of the cylinder, and the second inner friction plate 221 in sequence from the outside to the inside. The third pre-tightening member 212 clamps the first outer friction plate 213, the side wall of the cylinder, and the first inner friction plate 211; the fourth pre-tightening member 222 clamps the second outer friction plate 223, the side wall of the cylinder, and the second inner friction plate 221; the side wall of the cylinder is provided with a fifth sliding groove hole 210 and a sixth sliding groove hole 220; the third pre-tightening member 212 can move relative to the side wall of the cylinder using the fifth sliding groove hole 210, and the fourth pre-tightening member 222 can move relative to the side wall of the cylinder using the sixth sliding groove hole 220. The third pretensioner 212 is fixedly connected to the first outer friction plate 213 and the first inner friction plate 211 so that the third pretensioner 213, the first outer friction plate 213 and the first inner friction plate 211 move together; the fourth pretensioner 222 is fixedly connected to the second outer friction plate 223 and the second inner friction plate 211 so that the fourth pretensioner 222, the second outer friction plate 223 and the second inner friction plate 211 move together.

[0049] It should be understood that the first pre-tightening member 31 can also pass through the first outer friction plate 213 and move relative to the first outer friction plate 213 using the seventh sliding groove hole 32 opened on the first outer friction plate 213. The second pre-tightening member 41 can also pass through the second outer friction plate 223 and move relative to the second outer friction plate 223 using the eighth sliding groove hole 42 opened on the second outer friction plate 223.

[0050] like Figures 1 to 3As shown, overall, the first outer friction plate 213 and the first inner friction plate 211 form a first sliding friction system through the third pre-tightening member 212, realizing sliding friction with the first fixed friction system composed of the third inner friction plate 214, the baffle 16, and the third flange plate 142; the second outer friction plate 223 and the second inner friction plate 221 form a second sliding friction system through the fourth pre-tightening member 222, realizing sliding friction with the second fixed friction system composed of the fourth inner friction plate 224, the baffle 16, and the fourth flange plate 152; thus, regardless of the axial movement of the guide rod 11, the first sliding friction system and the first fixed friction system, as well as the second sliding friction system and the second fixed friction system, will experience sliding friction, utilizing frictional force to dissipate energy; and regardless of the axial movement of the guide rod 11, the first elastic member 171 will be compressed, ultimately achieving self-resetting using elastic force, thus simultaneously possessing energy dissipation and self-resetting capabilities.

[0051] Furthermore, a first connector 51 may be provided at one end of the guide rod 11 outside the cylinder body, and a second connector 52 may be provided at the other end of the cylinder body corresponding to the guide rod 11. The first connector 51 and the second connector 52 are used to install the self-resetting friction damper in the structure so that the structure can exert the self-resetting and energy dissipation functions of the self-resetting friction damper when it moves due to load. The first connector 51 and the second connector 52 may be in different forms such as ball joints, which will not be described in detail here.

[0052] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0053] It should also be noted that although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the technical solutions of the present invention based on the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention shall still fall within the scope of protection of the present invention.

[0054] It should also be understood that, unless otherwise specified or indicated, the terms “first,” “second,” “third,” etc., in the specification are used only to distinguish the various components, elements, and steps in the specification, and not to indicate the logical or sequential relationships between the various components, elements, and steps.

[0055] Furthermore, it should be recognized that the terminology described herein is used only to describe particular embodiments and not to limit the scope of the invention. It must be noted that the singular forms “a” and “an” used herein and in the appended claims include plural bases unless the context clearly indicates otherwise. For example, a reference to “a step” or “an apparatus” means a reference to one or more steps or apparatuses, and may include secondary steps and secondary apparatuses. All conjunctions used should be understood in the broadest sense. And the word “or” should be understood to have the definition of logical “or” rather than logical “exclusive OR”, unless the context clearly indicates otherwise. Furthermore, implementation of embodiments of the invention may include performing selected tasks manually, automatically, or in combination.

Claims

1. A self-resetting friction damper, characterized in that, It includes a cylinder and a guide rod that passes through the cylinder. The inner cavity of the cylinder is provided with a first piston, a first elastic member and a second piston for the guide rod to pass through in sequence. The guide rod is capable of axial movement relative to the cylinder, the first piston, the first elastic member and the second piston. The inner sidewall of the cylinder is provided with a first inner friction plate and a second inner friction plate that abut against the inner wall of the cylinder. The first inner friction plate includes a first protrusion protruding toward the guide rod, and the second inner friction plate includes a second protrusion protruding toward the guide rod. One end of the first elastic member abuts against the side of the first protrusion, and the other end of the first elastic member abuts against the side of the second protrusion. One end of the first piston abuts against the inner wall of the cylinder, and the other end of the first piston abuts against the side of the first protrusion. One end of the second piston abuts against the inner wall of the cylinder, and the other end of the second piston abuts against the side of the second protrusion. The guide rod is provided with a first limiting part and a second limiting part. The first limiting part abuts against the end of the first piston member away from the first elastic member, and the second limiting part abuts against the end of the second piston member away from the first elastic member. The first limiting part can move away from the first piston member along the axial direction of the guide rod, and the second limiting part can move away from the second piston member along the axial direction of the guide rod. It also includes a first pre-tightening member and a second pre-tightening member. The first pre-tightening member is inserted into the cylinder body, and the second pre-tightening member is also inserted into the cylinder body. The first pre-tightening member clamps the side wall of the cylinder body and the first inner friction plate, and the second pre-tightening member clamps the side wall of the cylinder body and the second inner friction plate. The first piston component includes a first piston plate and a first flange plate connected to the first piston plate, the first piston plate and the first flange plate being set at a preset angle; the second piston component includes a second piston plate and a second flange plate connected to the second piston plate, the second piston plate and the second flange plate being set at a preset angle. The guide rod passes through the first piston plate and the second piston plate to pass through the first piston member and the second piston member; A third inner friction plate is sandwiched between the first flange plate and the first inner friction plate, and a fourth inner friction plate is sandwiched between the second flange plate and the second inner friction plate. The first pretensioner passes through and clamps the third inner friction plate and the first flange plate, and the second pretensioner passes through and clamps the fourth inner friction plate and the second flange plate; The first flange plate has a third sliding groove hole, and the second flange plate has a fourth sliding groove hole. The first preload member can move relative to the first flange plate through the third sliding groove hole, and the second preload member can move relative to the second flange plate through the fourth sliding groove hole.

2. The self-resetting friction damper as described in claim 1, characterized in that, The cylinder body includes a first end component, a baffle, and a second end component, and the guide rod passes through the first end component to enter the cylinder body; One end of the baffle is connected to the first end component, and the other end of the baffle is connected to the second end component.

3. The self-resetting friction damper as described in claim 1, characterized in that, The first pre-tensioning member passes through the first inner friction plate, and the second pre-tensioning member passes through the second inner friction plate. The first inner friction plate has a first sliding groove hole on its surface, and the second inner friction plate has a second sliding groove hole on its surface. The first pre-tensioning member can move relative to the first inner friction plate through the first sliding groove hole, and the second pre-tensioning member can move relative to the second inner friction plate through the second sliding groove hole.

4. The self-resetting friction damper as described in claim 1, characterized in that, The first pretensioner and / or the second pretensioner are capable of axial expansion and contraction.

5. The self-resetting friction damper as described in claim 1, characterized in that, The first pretensioning member includes a first pretensioning part, a second pretensioning part, and a first pretensioning rod. One end of the first pretensioning rod is connected to the first pretensioning part, and the other end of the first pretensioning rod is connected to the second pretensioning part. The second pretensioning member includes a third pretensioning part, a fourth pretensioning part, and a second pretensioning rod. One end of the second pretensioning rod is connected to the third pretensioning part, and the other end of the second pretensioning rod is connected to the fourth pretensioning part. The first preload and the third preload are located outside the cylinder body, and the second preload and the fourth preload are located inside the cylinder body. At least one of the following is provided with a second elastic member: between the first preload and the outer wall of the cylinder body, between the second preload and the first flange plate, between the third preload and the outer wall of the cylinder body, and between the fourth preload and the second flange plate.

6. The self-resetting friction damper as described in claim 1, characterized in that, The cylinder body includes a first end component, a baffle, and a second end component. The first end component includes a first end plate and a third flange plate, and the second end component includes a second end plate and a fourth flange plate. The guide rod passes through the first end plate to enter the cylinder body. The sidewall of the cylinder is composed of the baffle, the first preload member passes through and clamps the first flange and the baffle, and the second preload member passes through and clamps the second flange and the baffle.

7. The self-resetting friction damper as described in claim 6, characterized in that, One end of the baffle abuts against the first end plate, and the other end of the baffle abuts against the second end plate.

8. The self-resetting friction damper as described in claim 1, characterized in that, It also includes a first outer friction plate, a second outer friction plate, a third pre-tightening member and a fourth pre-tightening member. The third pre-tightening member passes through the first outer friction plate, the side wall of the cylinder and the first inner friction plate in sequence from the outside to the inside. The fourth pre-tightening member passes through the second outer friction plate, the side wall of the cylinder and the second inner friction plate in sequence from the outside to the inside. The third pre-tensioning member is fixedly connected to the first outer friction plate and the first inner friction plate so that the third pre-tensioning member, the first outer friction plate and the first inner friction plate move together; the fourth pre-tensioning member is fixedly connected to the second outer friction plate and the second inner friction plate so that the fourth pre-tensioning member, the second outer friction plate and the second inner friction plate move together. The cylinder body has a fifth sliding groove and a sixth sliding groove on its side wall. The third preload member can move relative to the side wall of the cylinder body using the fifth sliding groove, and the fourth preload member can move relative to the side wall of the cylinder body using the sixth sliding groove.

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