Self-resetting energy dissipation damper

Abstract

The invention relates to a self-resetting energy dissipation damper which comprises an energy dissipation body, two force rods and two levers, the two force rods are used for being connected into a building structure in the axial direction and receiving axial force of the building structure, and the two levers are connected between the two force rods and the energy dissipation body in a transmission mode. The axial force is transmitted to the energy dissipation body after being reduced, the energy dissipation body comprises a fixed part and a movable part, the fixed part and the movable part can move relatively when bearing the reduced axial force, and the reduced axial force is absorbed and consumed through friction force generated by relative movement between the fixed part and the movable part. The problems that an existing damper is complex in structure and high in manufacturing cost, it cannot be guaranteed that all impact energy can be well absorbed and consumed, and the reset effect is insufficient are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of earthquake resistance of building structures, and in particular to a self-resetting energy-absorbing damper. Background Art

[0002] In recent years, as earthquake fortification intensity increases in more and more regions, traditional structures have struggled to meet the demand. Consequently, energy dissipation and shock absorption technologies have rapidly developed. By adding dampers to structures, they can maximize the absorption and dissipation of earthquake impact energy, mitigating the impact and damage caused by earthquakes.

[0003] Dampers used in building structures usually include two connecting ends for connecting to the building structure and an energy-absorbing body arranged between the two connecting ends. The energy-absorbing body further includes a fixed part and a moving part. The moving part is displaced / deformed relative to the fixed part to absorb and consume the impact energy transmitted from the connecting ends. In order to enable the building structure to automatically reset after being impacted, the energy-absorbing body is usually equipped with a self-resetting function, that is, it can automatically return to its original state after absorbing and consuming the impact energy, thereby driving the building structure to automatically reset.

[0004] In the prior art, the two connecting ends of a damper are typically arranged on the same axis as the energy-consuming element, as shown in the published patents CN107023210A and CN212248754U. A damper with this structure, upon receiving an impact force from a building structure at the connecting end, directly transfers the entire impact energy to the energy-consuming element for absorption and consumption. Large impact energy can easily damage the damper. Therefore, to meet high seismic requirements, conventional dampers often utilize new materials and have complex structures, resulting in high costs. Furthermore, they cannot guarantee the full absorption and consumption of impact energy, nor can they guarantee a resetting effect. Summary of the Invention

[0005] The present invention provides a self-resetting energy-dissipating damper, which solves the problems of the existing damper, such as complex structure, high cost, failure to ensure good absorption and consumption of all impact energy, and insufficient reset effect.

[0006] The present invention is implemented through the following scheme: a self-resetting energy-absorbing damper includes an energy-absorbing body, two force rods and two levers. The two force rods are used to be axially connected to the building structure and receive the axial force of the building structure. The two levers are respectively connected between the two force rods and the energy-absorbing body to reduce the axial force and transmit it to the energy-absorbing body. The energy-absorbing body includes a fixed part and a movable part that can move relative to each other when subjected to the reduced axial force, and the reduced axial force is absorbed and consumed by the friction force generated by the relative movement between the fixed part and the movable part.

[0007] A further improvement of the present invention is that the energy-consuming body further includes an elastic component connected between the fixed part and the movable part for resetting.

[0008] A further improvement of the present invention is that it also includes a shell, the energy-absorbing body and the two levers are installed in the shell, one end of the two force rods are movably connected to the first ends of the two levers respectively, the other ends of the two force rods are movably passed through the shell and form two connection ends for corresponding connection to the two sides of the building structure outside the opposite sides of the shell respectively, the second ends of the two levers are movably connected to the movable part of the energy-absorbing body, the two levers are respectively rotatably connected to the shell, and the swing axes of the two levers are located at positions adjacent to the first ends of the corresponding levers.

[0009] A further improvement of the present invention is that fulcrum fixing parts are relatively fixed on the opposite sides of the shell, and the relative inner ends of the two fulcrum fixing parts are provided with fulcrum second pivot holes, and each lever is provided with a fulcrum first pivot hole at a position corresponding to the corresponding swing axis, and the two levers are respectively pivotally connected to the two fulcrum fixing parts through the first pivot part passing through the corresponding fulcrum first pivot hole and the fulcrum second pivot hole.

[0010] A further improvement of the present invention is:

[0011] The fixed portion includes a first fixed member and a second fixed member, and the movable portion includes a first movable member and a second movable member, the first fixed member, the first movable member, the second movable member, and the second fixed member are movably connected end to end along a first transverse axis, and the leading end of the first fixed member and the trailing end of the second fixed member are respectively fixedly connected to opposite sides of the housing;

[0012] The two force rods extend along a second transverse axis parallel to the first transverse axis and are spaced apart from each other, the opposite inner ends of the two force rods are located within the housing, and the opposite outer ends of the two force rods are movable through opposite sides of the housing respectively;

[0013] One of the two levers is movably connected between the first movable member and one of the force rods, and the other of the two levers is movably connected between the second movable member and the other of the force rods.

[0014] A further improvement of the present invention is:

[0015] The first fixing member is a sleeve, and the first end of the first movable member is a core rod movably inserted into the interior of the first fixing member;

[0016] The tail end of the second movable member is a sleeve, the second fixed member is a core rod, and the tail end of the second movable member can be movably sleeved on the second fixed member;

[0017] The head end of the second movable member is a sleeve, and the tail end of the first movable member is a core rod movably inserted into the head end of the second movable member.

[0018] A further improvement of the present invention is that the elastic component includes a first elastic member, a second elastic member and a third elastic member, the first elastic member is accommodated in the first fixed member and fixedly connected to the head end of the first movable member, the second elastic member is accommodated in the head end of the second movable member and fixedly connected to the tail end of the first movable member, and the third elastic member is accommodated in the tail end of the second movable member and fixedly connected to the second fixed member.

[0019] A further improvement of the present invention is that the first ends of the two levers are each provided with a first strip hole, the first strip hole extends along the length direction of the lever, and the relative inner ends of the two force rods are each provided with a force rod pivot hole, and the first ends of the two levers respectively pass through the corresponding first strip hole and the force rod pivot hole through the first pivot member to realize the movable connection between the corresponding lever and the force rod.

[0020] A further improvement of the present invention is that the second ends of the two levers are each provided with a second strip hole, the second strip hole extends along the length direction of the lever, and the middle parts of the first movable part and the second movable part are respectively provided with a first movable part pivot hole and a second movable part pivot hole, and the two levers are respectively passed through the corresponding second strip hole and the first movable part pivot hole, or through the corresponding second strip hole and the second movable part pivot hole, through a third pivot part to realize the movable connection between the corresponding lever and the movable part.

[0021] The present invention includes but is not limited to the following beneficial effects:

[0022] By adding a lever between the force rod and the energy absorbing body for transmission, on the one hand, the large impact force received by the force rod is reduced and transmitted to the energy absorbing body to weaken the impact on the energy absorbing body. On the other hand, the displacement of the building structure can be amplified and transmitted to the energy absorbing body, so that there is a larger displacement between the fixed part and the movable part of the energy absorbing body, so as to provide sufficient friction to absorb and consume the transmitted axial force, reduce the risk of damage to the damper and achieve better seismic effect.

[0023] The elastic component allows the energy dissipation body to not only absorb and consume the impact energy of the building structure, but also reset the displacement caused by the impact. Furthermore, the coordinated coordination of the elastic parts in the elastic component enhances the anti-seismic and reset effects.

[0024] By adopting two movable ground rods to connect with the building structure and cooperating with two levers to transmit force, direct connection between the shell and the building structure is avoided, which can reduce the risk of damage to the shell and avoid the possibility of eccentric force on the damper, thereby extending the service life of the damper.

[0025] By adopting a modular assembly structure, it is easy to replace and repair parts, and it is highly economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the external structure of the damper of the present invention is shown.

[0027] Figure 2 A schematic diagram of the internal structure of the damper of the present invention is shown.

[0028] Figure 3 A schematic diagram of the exploded state of the internal structure of the damper of the present invention is shown.

[0029] In the figure: 1. Shell; 11. Fulcrum fixing member; 111. Second pivot hole of fulcrum; 2. Force rod; 21. Force rod pivot hole; 31. First fixing member; 32. First movable member; 321. First movable member pivot hole; 33. Second movable member; 331. Second movable member pivot hole; 34. Second fixing member; 35. First elastic member; 36. Second elastic member; 37. Third elastic member; 4. Lever; 41. First strip hole; 42. First pivot hole of fulcrum; 43. Second strip hole; 51. First pivot member; 52. Second pivot member; 53. Third pivot member. DETAILED DESCRIPTION

[0030] To address the problems of existing dampers, such as complex structures, high costs, inability to fully absorb and dissipate impact energy, and insufficient reset performance, the present invention provides a self-resetting energy-dissipating damper. The self-resetting energy-dissipating damper will be further described below using specific embodiments with reference to the accompanying drawings.

[0031] See Figures 1 to 3As shown, a self-resetting energy-absorbing damper includes an energy-absorbing body, two force rods 2 and two levers 4. The two force rods 2 are used to be axially connected to the building structure and receive the axial force F of the building structure. The two levers 4 are respectively connected between the two force rods 2 and the energy-absorbing body to reduce the axial force F and transmit it to the energy-absorbing body. The energy-absorbing body includes a fixed part and a movable part that can move relative to each other when subjected to the reduced axial force, and absorbs and consumes the reduced axial force through the friction force generated by the relative movement between the fixed part and the movable part.

[0032] The damper transmits the force by adding a lever 4 between the force rod 2 and the energy-consuming body. On the one hand, the large impact force received by the force rod 2 is reduced and then transmitted to the energy-consuming body, thereby weakening the impact on the energy-consuming body. On the other hand, the displacement of the building structure can be amplified and transmitted to the energy-consuming body, so that there is a larger displacement between the fixed part and the movable part of the energy-consuming body, thereby providing sufficient friction to absorb and consume the transmitted axial force, reducing the risk of damage to the damper and achieving better seismic effect.

[0033] In some preferred embodiments, the energy dissipation body further includes an elastic component connected between the fixed portion and the movable portion for resetting. The elastic component enables the energy dissipation body to not only absorb and dissipate impact energy applied to the building structure, but also to reset the displacement of the building structure caused by the impact.

[0034] In order to realize the installation and support of the above-mentioned energy-absorbing body, force rod 2 and lever 4, in some preferred embodiments, the damper further includes a housing 1, the energy-absorbing body and the two levers 4 are installed in the housing 1, one end of the two force rods 2 is movably connected to the first end of the two levers 4, and the other end of the two force rods 2 is movably passed through the housing 1 and forms two connection ends for corresponding connection of the two sides of the building structure on the opposite sides of the housing 1, such as Figure 1 As shown, the second ends of the two levers 4 are movably connected to the movable portion of the energy-absorbing body. The two levers 4 are rotatably connected to the housing 1, and the swing axes of the two levers 4 are located near the first ends of the respective levers 4. This allows the levers 4 to reduce the axial force F received by the force rod 2 and transmit it to the energy-absorbing body, while also amplifying the corresponding displacement and transmitting it to the energy-absorbing body.

[0035] In this embodiment, the fixed portion includes a first fixed member 31 and a second fixed member 34, and the movable portion includes a first movable member 32 and a second movable member 33. The first fixed member 31, the first movable member 32, the second movable member 33, and the second fixed member 34 are movably connected end to end along the first transverse axis, and the head end of the first fixed member 31 and the tail end of the second fixed member 34 are respectively fixedly connected to opposite sides of the housing 1. Specifically, the first fixed member 31 is made of a thick sleeve, the first movable member 32 is made of two thin sleeves located at the head and tail ends, and a connecting portion fixedly connected between the two thin sleeves, the second movable member 33 is made of two thick sleeves located at the head and tail ends, and a connecting portion fixedly connected between the two thick sleeves, and the second fixed member 34 is made of a thin sleeve. The elastic assembly includes a first elastic member 35, a second elastic member 36, and a third elastic member 37, wherein the first elastic member 35 is accommodated in the first fixed member 31, and the second elastic member 36 and the third elastic member 37 are respectively accommodated in two thick sleeves at the front and rear ends of the second movable member 33. The inner diameter of the thick sleeve is not less than the outer diameter of the thin sleeve, so that the head end of the first movable member 32 can be inserted into the first fixed member 31 as a core rod and fixedly connected to the first elastic member 35, while the tail end of the first movable member 32 can be inserted into the head end of the second movable member 33 as a core rod and fixedly connected to the second elastic member 36. At the same time, the second fixed member 34 can be inserted into the tail end of the second movable member 33 as a core rod and fixedly connected to the third elastic member 37. Preferably, the inner diameter of the thick sleeve is equal to the outer diameter of the thin sleeve, so that when relative movement occurs between the two, friction needs to be overcome, and the axial force applied is absorbed and consumed by this friction. Of course, the inner diameter of the thick sleeve can also be larger than the outer diameter of the thin sleeve, but it is necessary to add components such as balls or rubber strips in the radial gap between the two to realize and optimize the friction energy consumption. The first elastic member 35 is used to provide a reverse elastic force to urge the first movable member 32 to reset when the first movable member 32 moves relative to the first fixed member 31, the second elastic member 36 is used to provide a reverse elastic force to urge the first movable member 32 and the second movable member 33 to reset when relative movement occurs between the first movable member 32 and the second movable member 33, and the third elastic member 37 is used to provide a reverse elastic force to urge the second movable member 33 to reset when the second movable member 33 moves relative to the second fixed member 34. Preferably, the end of the first elastic member 35 facing away from the first movable member 32 is fixed to the first fixed member 31, the end of the second elastic member 36 facing away from the first movable member 32 is fixed to the second movable member 33, and the end of the third elastic member 37 facing away from the second fixed member 34 is fixed to the second movable member 33, that is, both ends of each elastic member are fixed.This arrangement allows the first elastic member 35, the second elastic member 36, and the third elastic member 37 to not only perform their respective reset functions but also cooperate with each other to accelerate the reset of each component. They can also cooperatively absorb and dissipate axial forces, thereby enhancing the damper's anti-seismic and reset effects. The first elastic member 35, the second elastic member 36, and the third elastic member 37 are all disc springs. In practical applications, these are not limited to disc springs; other elastic members such as springs may also be used.

[0036] The two force rods 2 extend along a second transverse axis parallel to the first transverse axis and are spaced apart from each other. The opposite inner ends of the two force rods 2 are located inside the shell 1, and the opposite outer ends of the two force rods 2 are movable through the opposite sides of the shell 1 and form two connection ends for connecting to the building structure outside the shell 1. Figure 1 As shown. The connection between the two connecting ends and the building structure can be a fixed welding method or an articulated connection method. By connecting the two force rods 2 on both sides of the building and on the same transverse axis, the axial force on the damper can be maximized to reduce damage to the damper caused by other factors. In addition, the use of two movable force rods to connect to the building structure and cooperate with two levers to transmit force avoids the direct connection between the shell and the building structure, which can reduce the risk of damage to the shell and avoid the possibility of eccentric force on the damper, thereby increasing the service life of the damper.

[0037] Pivot fixing members 11 are fixed to opposite sides of the housing 1. U-shaped connecting portions are fixed to the opposite inner ends of the two fulcrum fixing members 11. A pair of flange plates of the U-shaped connecting portions are symmetrically provided with fulcrum first pivot holes 111. Each lever 4 is provided with a fulcrum first pivot hole 42 at a position corresponding to the corresponding swing axis. The two levers 4 are respectively embedded in the two U-shaped connecting portions and are pivotally connected to the two fulcrum fixing members 11 via first pivot members 51 that penetrate the corresponding fulcrum first pivot hole 42 and the pair of fulcrum first pivot holes 111. The provision of the fulcrum fixing members 11 provides support for the fulcrum (i.e., the position of the swing axis) of the corresponding lever 4, and ensures that the lever 4 can swing around the swing axis. In addition, the first ends of the two levers 4 (i.e., the ends movably connected to the corresponding force rods 2) are each provided with a first strip hole 41, and the first strip hole 41 extends along the length direction of the lever 4. The relative inner ends of the two force rods 2 can also be set to a U-shaped connection structure similar to that fixed on the fulcrum fixing member 11, on which a pair of force rod pivot holes 21 are provided. The lever 4 is movably connected to the corresponding force rod 2 through the first pivot member 51 that passes through the corresponding first strip hole 41 and the pair of force rod pivot holes 21. Correspondingly, the second ends of the two levers 4 (i.e., the ends movably connected to the movable portion of the energy-consuming body) are each provided with a second strip-shaped hole 43 extending along the length of the levers 4. The fixed connection portions of the first movable member 32 and the second movable member 33 are respectively provided with a first movable member pivot hole 321 and a second movable member pivot hole 331. The two levers 4 are movably connected to the movable portion by a third pivot member 53, which passes through the corresponding second strip-shaped hole 43 and the first movable member pivot hole 321, or the corresponding second strip-shaped hole 43 and the second movable member pivot hole 331. In this embodiment, the first pivot member 51, the second pivot member 52, and the third pivot member 53 all utilize a screw and nut combination structure. By utilizing the screw and nut combination structure to achieve movable connection between the components, the damper has a modular assembly structure, which facilitates the replacement and maintenance of parts and is highly economical. Of course, in practical applications, the present invention is not limited to the combination structure of the screw and the nut, and the housing may also adopt other connection structures such as a latch.

[0038] The working principle of the damper of the present invention is: Figure 2Taking the left half of the figure as an example, when the force rod 2 is subjected to pressure F from the building structure, it will move to the right, driving the lever 4 to rotate counterclockwise around the swing axis (i.e., the first pivot hole 111 of the fulcrum), thereby driving the first movable member 32 to move to the left relative to the first fixed member 31. This movement needs to overcome the friction between the two to achieve the purpose of absorbing and consuming the pressure F. In the case where both ends of each elastic member are fixed, this movement also needs to overcome the respective reverse elastic forces of the first elastic member 35 and the second elastic member 36. After the pressure F is absorbed and consumed, under the action of this reverse elastic force, the first movable member 32 moves to the right, driving the lever 4 to rotate clockwise around the swing axis, thereby driving the force rod 2 to move to the left, thereby causing the building structure to reset. It should be noted that when the lever 4 swings, the first pivot member 51 can move along the first strip hole 41, and the third pivot member 53 can move along the second strip hole 43, so as to eliminate the vertical displacement caused by the swinging of the lever 4. The working principle of the right half is the same as that of the left half, and will not be described here in detail.

[0039] The present invention transmits force by adding a lever 4 between the force rod 2 and the energy-absorbing body. On the one hand, the large impact force received by the force rod 2 is reduced and then transmitted to the energy-absorbing body, thereby weakening the impact on the energy-absorbing body. On the other hand, the displacement of the building structure can be amplified and then transmitted to the energy-absorbing body, so that there is a larger displacement between the components in the energy-absorbing body, thereby providing sufficient friction to absorb and consume the transmitted axial force, reducing the risk of damage to the damper and achieving a better anti-seismic effect. In addition, the present invention avoids directly connecting the shell 1 to the building structure by using two movable force rods 2 to connect to the building structure, thereby reducing the risk of damage to the shell 1 and avoiding the possibility of eccentric force on the damper, thereby increasing the service life of the damper. The present invention adopts a modular assembly structure, which is convenient for replacing and repairing parts and has high economic efficiency.

[0040] The present invention has been described in detail above with reference to the embodiments of the accompanying drawings. A person skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A self-resetting energy-dissipating damper, characterized in that: The energy-absorbing body comprises an energy-absorbing body, two force rods and two levers. The two force rods are used to be axially connected to the building structure and receive the axial force of the building structure. The two levers are respectively connected between the two force rods and the energy-absorbing body to reduce the axial force and transmit it to the energy-absorbing body. The energy-absorbing body comprises a fixed part and a movable part that can move relative to each other when subjected to the reduced axial force, and absorbs and consumes the reduced axial force through the friction force generated by the relative movement between the fixed part and the movable part.

2. The self-resetting energy dissipation damper according to claim 1, characterized in that: The energy-consuming body further includes an elastic component connected between the fixed part and the movable part for resetting.

3. The self-resetting energy dissipation damper according to claim 2, characterized in that: It also includes a shell, in which the energy-consuming body and the two levers are installed. One end of the two force rods is movably connected to the first end of the two levers respectively, and the other ends of the two force rods are movably passed through the shell and form two connection ends for corresponding connection to the two sides of the building structure outside the opposite sides of the shell respectively. The second ends of the two levers are movably connected to the movable part of the energy-consuming body, and the two levers are respectively rotatably connected to the shell, and the swing axes of the two levers are located at positions adjacent to the first ends of the corresponding levers.

4. The self-resetting energy-dissipating damper according to claim 3, characterized in that: Pivot fixing members are relatively fixed on opposite sides of the shell, and the relative inner ends of the two fulcrum fixing members are provided with fulcrum second pivot holes. A fulcrum first pivot hole is provided at a position corresponding to the corresponding swing axis on each lever, and the two levers are respectively pivotally connected to the two fulcrum fixing members through the first pivot member passing through the corresponding fulcrum first pivot hole and the fulcrum second pivot hole.

5. The self-resetting energy-dissipating damper according to claim 3, characterized in that: The fixed portion includes a first fixed member and a second fixed member, and the movable portion includes a first movable member and a second movable member, the first fixed member, the first movable member, the second movable member, and the second fixed member are movably connected end to end along a first transverse axis, and the leading end of the first fixed member and the trailing end of the second fixed member are respectively fixedly connected to opposite sides of the housing; The two force rods extend along a second transverse axis parallel to the first transverse axis and are spaced apart from each other, the opposite inner ends of the two force rods are located within the housing, and the opposite outer ends of the two force rods are movable through opposite sides of the housing respectively; One of the two levers is movably connected between the first movable member and one of the force rods, and the other of the two levers is movably connected between the second movable member and the other of the force rods.

6. The self-resetting energy-dissipating damper according to claim 5, characterized in that: The first fixing member is a sleeve, and the first end of the first movable member is a core rod movably inserted into the interior of the first fixing member; The tail end of the second movable member is a sleeve, the second fixed member is a core rod, and the tail end of the second movable member can be movably sleeved on the second fixed member; The head end of the second movable member is a sleeve, and the tail end of the first movable member is a core rod movably inserted into the head end of the second movable member.

7. The self-resetting energy dissipation damper according to claim 6, characterized in that: The elastic component includes a first elastic member, a second elastic member and a third elastic member. The first elastic member is accommodated in the first fixed member and fixedly connected to the head end of the first movable member. The second elastic member is accommodated in the head end of the second movable member and fixedly connected to the tail end of the first movable member. The third elastic member is accommodated in the tail end of the second movable member and fixedly connected to the second fixed member.

8. The self-resetting energy dissipation damper according to claim 5, characterized in that: The first ends of the two levers are each provided with a first strip hole, which extends along the length direction of the lever, and the relative inner ends of the two force rods are each provided with a force rod pivot hole, and the first ends of the two levers respectively pass through the corresponding first strip hole and the force rod pivot hole through the first pivot member to realize the movable connection between the corresponding lever and the force rod.

9. The self-resetting energy dissipation damper according to claim 5, characterized in that: The second ends of the two levers are each provided with a second strip hole, which extends along the length direction of the levers. The middle parts of the first movable part and the second movable part are respectively provided with a first movable part pivot hole and a second movable part pivot hole. The two levers are respectively passed through the corresponding second strip hole and the first movable part pivot hole, or through the corresponding second strip hole and the second movable part pivot hole through a third pivot part to realize the movable connection between the corresponding lever and the movable part.

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