Self-resetting friction damper, beam falling prevention device and friction pendulum spherical support
By designing a self-reset mechanism in the friction damper, using the combination of fixed plate, movable plate and elastic device, the problems of poor energy consumption and inability to reset by existing friction dampers are solved, and more efficient energy absorption and dampers are achieved self-recovery.
Patent Information
- Application Number
- CN202420878824.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-25
AI Technical Summary
The existing friction dampers consume poor energy during secondary use and cannot reset to the initial state, affecting their performance of reuse.
A self-reset friction damper is designed to reset the fixed plate and the movable plate through the cross-setting of the fixing plate and the movable plate, combining the elastic device and the pushing top surface, using the preloading force provided by the elastic device to reset the fixed plate and the movable plate through the guide The movement of the plate is converted into the movement of the fixed plate, realizing the self-reset of the damper.
It improves the energy consumption effect of the damper during secondary use, ensures that the damper can return to its initial state, facilitates the next use, and improves friction and enhances the stability and wear resistance of the damper.
Smart Images
Figure CN222227034U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of dampers, and in particular relates to a self-resetting friction damper, a beam-falling prevention device and a friction pendulum spherical support. Background Art
[0002] As an energy dissipation device, friction damper is widely used in the market due to its strong energy dissipation capacity, stable performance, simple structure, simple material and low cost. It has unique advantages in controlling the seismic response of structures near faults and the seismic response of medium and high-rise structures.
[0003] When ordinary friction dampers are working, they consume energy through friction between different materials, and the magnitude of the friction force is determined by adjusting the tightening force of the bolts. The sliding friction force is proportional to the tightening force of the bolts. However, in actual use, when the damper is used for the second time, the friction energy consumption effect is poor. Utility Model Content
[0004] The purpose of the present application is to provide a self-resetting friction damper, an anti-beam drop device and a friction pendulum spherical support to solve the above-mentioned technical problems existing in the prior art.
[0005] This application is implemented as follows:
[0006] In a first aspect, an embodiment of the present application provides a self-resetting friction damper, comprising a fixed plate, a movable plate, a guide and an elastic device, wherein: the fixed plate and the movable plate are arranged to overlap along a first direction, and the movable plate is arranged to be movable relative to the fixed plate along a second direction, and the second direction intersects with the first direction; the guide cooperates with the fixed plate guide, and is used to guide the fixed plate to move along the first direction when the movable plate moves relative to the fixed plate along the second direction; the elastic device is connected to the fixed plate, and is used to apply a pre-tightening force to the fixed plate when the movable plate moves relative to the fixed plate along the second direction, so that the fixed plate abuts against the movable plate; among the fixed plate and the movable plate, at least one of the opposite surfaces is provided with a pushing surface, and the pushing surface is used to convert the pre-tightening force into a reset force applied to the movable plate along the second direction when the movable plate moves relative to the fixed plate along the second direction, so as to reset the movable plate.
[0007] In a second aspect, an embodiment of the present application provides a beam-falling prevention device, comprising the damper provided in the embodiment of the first aspect, wherein the damper is installed between the bridge and the pier.
[0008] In a third aspect, an embodiment of the present application provides a friction pendulum spherical bearing, comprising the damper provided in the embodiment of the first aspect, wherein the damper is connected between an upper bearing plate and a lower bearing plate of the bearing.
[0009] The technical solution provided by this application can achieve the following beneficial effects:
[0010] In the present application, the movable plate and the fixed plate are movably arranged to utilize the friction between the movable plate and the fixed plate to dissipate energy; and an elastic device is provided to press the fixed plate against the movable plate when the movable plate moves relative to the fixed plate, thereby increasing the friction between the two and enhancing the energy dissipation effect; and a push-up surface is provided to convert the preload force provided by the elastic device into a reset force applied to the movable plate in the second direction, so as to reset the movable plate and restore the damper to its original position, so that the damper can have a good energy dissipation effect when it is used next time. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0012] Figure 1 The structure of the damper provided in some embodiments of the present application is shown in FIG. Figure 1 ;
[0013] Figure 2 is a schematic diagram of a disassembled damper provided in some embodiments of the present application;
[0014] Figure 3 The structure of the damper provided in some embodiments of the present application is shown in FIG. Figure 2 ;
[0015] Figure 4 The structure of the damper provided in some embodiments of the present application is shown in FIG. Figure 3 ;
[0016] Figure 5 The structure of the damper provided in some embodiments of the present application is shown in FIG. Figure 4 ;
[0017] Figure 6 The structure of the damper provided in some embodiments of the present application is shown in FIG. Figure 5 ;
[0018] Figure 7 is a schematic diagram of the structure of a beam-falling prevention device provided in some embodiments of the present application;
[0019] Figure 8 It is a schematic diagram of the structure of a friction pendulum spherical bearing provided in some embodiments of the present application.
[0020] In the figure: 10-damper, 100-fixed plate, 110-first through hole, 200-movable plate, 210-second through hole, 300-guide member, 400-elastic device, 500-pushing surface, 610-pushing protrusion, 620-pushing groove, 700-limiting member, 810-bridge, 820-pier, 830-support, 831-upper support plate, 832-lower support plate, 833-rotating body. DETAILED DESCRIPTION
[0021] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.
[0022] In the related art, the damper does not have a reset function, and the damper cannot be restored to its initial state after use, resulting in that the movable displacement of the damper is limited when it is used next time, thereby affecting the energy dissipation effect of the damper.
[0023] In view of this, the present application embodiment provides a self-resetting friction damper, referring to Figures 1 to 6 As shown, the damper 10 can reset itself to the initial position after use, so as to facilitate the next use of the damper 10 .
[0024] The damper 10 provided in the embodiment of the present application includes a fixed plate 100, a movable plate 200, a guide 300 and an elastic device 400. The fixed plate 100 and the movable plate 200 are arranged to overlap along a first direction, and the movable plate 200 is arranged to move relative to the fixed plate 100 along a second direction. The first direction and the second direction are arranged to intersect, and the first direction can refer to Figure 1 The y-axis in the second direction can be referenced Figure 1 The guide member 300 cooperates with the fixed plate 100 for guiding the fixed plate 100 to move along the first direction and to limit the moving direction of the fixed plate 100. The elastic device 400 is connected to the fixed plate 100 and is used to apply a pre-tightening force to the fixed plate 100 so that the fixed plate 100 abuts against the movable plate 200. And at least one of the movable plate 200 and the fixed plate 100 is provided with a push-up surface 500 on its opposite surface. The opposite surface refers to the surfaces of the movable plate 200 and the fixed plate 100 that are arranged facing each other when the movable plate 200 and the fixed plate 100 are arranged overlappingly.
[0025] When the movable plate 200 is driven by an external force to move in the second direction, the fixed plate 100 cannot move in the second direction due to the restriction of the guide member 300. Therefore, the position of the fixed plate 100 in the second direction remains unchanged, and only the movable plate 200 moves in the second direction, rubbing against the fixed plate 100, and friction between the two consumes energy. At the same time, since the opposing surface of at least one of the movable plate 200 and the fixed plate 100 is provided with a push-up surface 500, when the movable plate 200 and the fixed plate 100 slide, the push-up surface 500 will convert the external force into a driving force applied to the fixed plate 100 in the first direction, so that the fixed plate 100 moves in the first direction under the guidance of the guide member 300. The movable plate 200 moves in the first direction away from the fixed plate 100, compressing the elastic device 400 connected to the fixed plate 100. The compressed elastic device 400 applies a pre-tightening force to the fixed plate 100, so that the fixed plate 100 and the movable plate 200 are pressed together, increasing the fastening force between the movable plate 200 and the fixed plate 100, thereby increasing the friction between the two and improving the energy dissipation effect. After the external force disappears, the push-up surface 500 converts the pre-tightening force into a reset force applied to the movable plate 200 in the second direction, driving the movable plate 200 to move to the initial position, and completing the reset.
[0026] In some specific embodiments, the push-up surface 500 is an inclined surface. Due to its structural limitations, when the movable plate 200 slides relative to the fixed plate 100, the push-up surface 500 will push the fixed plate 100 away from or close to the fixed plate 100 along the first direction. In this way, the elastic device 400 can be compressed and the movable plate 200 can be reset.
[0027] By setting the elastic device 400 to be connected with the fixed plate 100, and setting the push-up surface 500 to cooperate with the guide 300, the elastic device 400 can be compressed during the friction energy consumption process between the movable plate 200 and the fixed plate 100. After the external force driving the movable plate 200 to move along the second direction disappears, the elastic device 400 can drive the movable plate 200 and the fixed plate 100 to reset, so that the damper 10 is restored to the initial state for the next use. In addition, since the elastic device 400 is compressed, the pre-tightening force applied by the elastic device 400 to the fixed plate 100 is also increased, which will increase the friction between the fixed plate 100 and the movable plate 200, thereby improving the energy consumption effect of the fixed plate 100 and the movable plate 200.
[0028] The guide member 300, as a guide structure, can be a guide rail externally disposed on the fixed plate 100, the guide rail extending along the first direction, the fixed plate 100 is engaged with the guide rail, and can only move along the extension direction of the guide rail. The guide member 300 can also be a limiting structure externally disposed on the fixed plate 100, limiting the fixed plate 100 from moving along the second direction, so that the fixed plate 100 can only move along the first direction.
[0029] In some preferred embodiments, the guide member 300 may be a rod-shaped structure, and the guide member 300 is directly disposed through the movable plate 200 and the fixed plate 100. Figures 1 to 6 As shown. The axial direction of the guide member 300 is the first direction, and the fixed plate 100 can move along the axial direction of the guide member 300. At the same time, since the guide member 300 passes through the movable plate 200 and the fixed plate 100 at the same time, the two can be preliminarily positioned to avoid the positional separation of the two. Exemplarily, the fixed plate 100 is provided with a first through hole 110, and the movable plate 200 is provided with a second through hole 210, and the guide member 300 passes through the first through hole 110 and the second through hole 210 at the same time. The size of the first through hole 110 is almost the same as the radial size of the guide member 300, and the radial size of the second through hole 210 is larger than the radial size of the guide member 300. Under such a structure, the guide member 300 can move in the first through hole 110 and the second through hole 210 along the first direction, and at the same time, the guide member 300 can move in the second through hole 210 along the second direction, so that the movable plate 200 moves relative to the fixed plate 100 along the second direction.
[0030] It can be understood that, since the fixing plate 100 can slide along the guide 300 in the first direction, when the damper 10 is in the initial state, part of the guide 300 is exposed from the fixing plate 100, so as to provide the fixing plate 100 with a margin of activity in the first direction. Further preferably, the elastic device 400 can be sleeved on the part of the guide 300 exposed from the fixing plate 100, and the elastic device 400 is fixed between the guide 300 and the fixing plate 100. The elastic device 400 is fixed by the guide 300 and the fixing plate 100, thereby avoiding additional fixing of the elastic device 400, simplifying the structure of the damper 10, and making the production and assembly efficiency of the damper 10 higher and faster. In addition, the elastic device 400 is sleeved outside the guide 300, and the guide 300 can also limit the compression direction of the elastic device 400, avoiding the position deviation of the elastic device 400 during the compression process, resulting in the situation that it cannot provide pre-tightening force for the fixing plate 100. The elastic device 400 is generally a spring structure, or an elastic block made of elastic material.
[0031] Only through-hole structures are provided on the fixed plate 100 and the movable plate 200 , and the elastic device 400 is provided outside the fixed plate 100 , which will not affect the structural strength of the fixed plate 100 . The structural strength of the fixed plate 100 and the movable plate 200 is relatively high and can withstand greater forces.
[0032] In some preferred embodiments, both ends of the guide member 300 are fixed with limit members 700. Figures 1 to 6As shown, the limiting member 700 limits the guide member 300 in the first direction to prevent the guide member 300 from being separated from the movable plate 200 or the fixed plate 100. The elastic device 400 is pressed tightly between the movable plate 200 and the limiting member 700. In the case where the limiting member 700 directly contacts the movable plate 200, it should be noted that the size of the limiting member 700 needs to be larger than the size of the second through hole 210.
[0033] The present application provides some dampers 10, including two movable plates 200, which are arranged in a row along the second direction. The two movable plates 200 are connected to the fixed plate 100, and a push-up surface 500 is provided on at least one of the movable plates 200 and the fixed plate 100. In the second direction, the two movable plates 200 are not arranged in close contact, and a movable gap is provided between the two movable plates 200. Figures 1 to 6 shown.
[0034] In specific use, the two movable plates 200 are respectively connected to two objects that need to dissipate energy, and the fixed plate 100 is fixed by the guide 300. When the two objects move relative to each other, the two movable plates 200 move along with their corresponding objects, approaching or moving away from each other along the second direction. When the two movable plates 200 approach each other, the movable gap between the two movable plates 200 can prevent the two movable plates 200 from colliding. In addition, the two objects are connected to the movable plates 200, and the damper 10 is subjected to stable and balanced force as a whole.
[0035] In some embodiments of the present application, there are two fixed plates 100, and the two fixed plates 100 are respectively located on both sides of the movable plate 200. Figures 1 to 5 The two fixed plates 100 are both connected with guides 300 and elastic devices 400 , and the two fixed plates 100 are clamped on both sides of the movable plate 200 . When the movable plate 200 moves along the first direction, the movable plate 200 can dissipate energy by friction with the two fixed plates 100 , thereby improving the energy dissipation effect of the damper 10 .
[0036] The push-up surface 500 may be provided on only one of the fixed plate 100 and the movable plate 200. Exemplarily, the push-up surface 500 is provided at either end of the movable plate 200, the push-up surface 500 extends obliquely toward the fixed plate 100, and a portion of the fixed plate 100 is located on the moving path of the push-up surface 500 along the second direction. When the movable plate 200 moves along the second direction, the push-up surface 500 can contact the fixed plate 100 so that the fixed plate 100 moves in a direction away from the movable plate 200. Exemplarily, the push-up surface 500 is provided at the end of the fixed plate 100, the push-up surface 500 extends obliquely toward the fixed plate 100, the push-up surface 500 is located on the moving path of the movable plate 200 along the second direction, and the push-up surface 500 contacts the movable plate 200 so that the fixed plate 100 moves in a direction away from the movable plate 200.
[0037] The push-up surface 500 may also be provided on both the fixed plate 100 and the movable plate 200. Figures 1 to 6 As shown, one of the fixed plate 100 and the movable plate 200 is provided with a push-up protrusion 610, and the other is provided with a push-up groove 620 matched with the push-up protrusion 610, and the push-up protrusion 610 is installed in the push-up groove 620, and the surface facing each other between the push-up protrusion 610 and the push-up groove 620 is the push-up surface 500. In the process of the movable plate 200 moving along the second direction, due to the structural limitation of the push-up protrusion 610 and the push-up groove 620, the movable plate 200 is always in surface contact with the fixed plate 100. Compared with the case where only the fixed plate 100 or the movable plate 200 is provided with the push-up surface 500, the structure in which the fixed plate 100 and the movable plate 200 are both provided with the push-up surface 500 can increase the contact area between the two plates, thereby improving the friction energy dissipation effect. In some preferred embodiments, a plurality of push-up protrusions 610 or push-up grooves 620 are provided, so as to further increase the contact area between the fixed plate 100 and the movable plate 200.
[0038] In some embodiments of the present application, the guide member 300 passes through the fixed plate 100 and the movable plate 200 at the same time, the elastic device 400 is sleeved on the portion of the guide member 300 exposed on the fixed plate 100, and the elastic device 400 is fixed between the guide member 300 and the fixed plate 100; and the guide member 300 passes through the portion of the fixed plate 100 where the push-up protrusion 610 or the push-up groove 620 is provided, and the guide member 300 passes through the portion of the movable plate 200 where the push-up protrusion 610 or the push-up groove 620 is provided. The guide member 300 and the elastic device 400 are as close as possible to the portion of the fixed plate 100 or the movable plate 200 where the push-up surface 500 is provided, so that the guide member 300 and the elastic device 400 are as close as possible to the portion of the fixed plate 100 or the movable plate 200 where the push-up surface 500 is provided, so that the guide member 300 and the elastic device 400 are as close as possible to the same portion as the force converted by the push-up surface 500, so as to ensure that the fixed plate 100 can move in the first direction as much as possible, and avoid the displacement of the moving direction of the fixed plate 100, which causes the position of the fixed plate 100 to be stuck.
[0039] The shapes of the push-up protrusion 610 and the push-up groove 620 are adapted to each other. In different embodiments, the push-up protrusion 610 can be set to different shapes. Figure 1 , Figures 3 to 6 shown.
[0040] Further preferably, the movable plate 200 is provided with a push-up protrusion 610, the fixed plate 100 is provided with a push-up groove 620, and along the first direction, the length of the guide member 300 penetrating the movable plate 200 is greater than or equal to the length of the guide member 300 penetrating the fixed plate 100, Figures 1 to 6 As the radial dimension of the second through hole 210 provided on the movable plate 200 is relatively large, the push-up protrusion 610 is provided on the movable plate 200 to reduce the influence of the second through hole 210 on the structural strength of the movable plate 200 and avoid the structural strength of the movable plate 200 being too low.
[0041] When there are two movable plates 200, when the two movable plates 200 slide in opposite directions along the second direction, the fixed plate 100 will be pulled. The middle of the fixed plate 100 corresponding to the movable gap between the two movable plates 200 is not provided with a push-up groove 620, and the positions on both sides of the fixed plate 100 corresponding to the movable plates 200 are provided with push-up grooves 620. Therefore, the structural strength of the middle of the fixed plate 100 is greater than that of the two sides thereof. Even if the two sides of the fixed plate 100 are pulled by different movable plates 200 respectively, the fixed plate 100 is not prone to breakage.
[0042] The present application also provides a beam-falling prevention device, referring to Figure 7As shown, the damper 10 provided by any of the above embodiments is connected between the bridge 810 and the pier 820. When an earthquake occurs, the bridge 810 and the pier 820 move relative to each other, and the damper 10 can dissipate energy by friction. Moreover, the damper 10 is connected between the two, which can prevent the bridge 810 from falling off the pier 820 due to excessive displacement. The damper 10 can dissipate energy by friction under extreme loads such as earthquakes and impacts, and prevent the bridge 810 from falling off. At the same time, it can realize self-reset after deformation. The damper 10 is wear-resistant and low-damage, and can be repaired and replaced simply, economically and efficiently.
[0043] If the size of the damper 10 is small, multiple dampers 10 may be provided and connected end to end, and then connected between the bridge 810 and the pier 820. Adjacent dampers 10 are connected by bolts, so that two adjacent dampers 10 can be rotated while maintaining the connection effect, so that the damper 10 can be adjusted to the optimal state according to the adaptive adjustment of the connection position between the damper 10 and the bridge 810 and the pier 820.
[0044] The present application also provides a friction plate spherical support 830, including the damper 10 provided in any of the above embodiments, with reference to Figure 8 As shown, the support 830 includes an upper support plate 831, a lower support plate 832, and a rotating body 833 located between the upper support plate 831 and the lower support plate 832, and the rotating body 833 can rotate relative to the upper support plate 831 and the lower support plate 832. The damper 10 is connected between the upper support plate 831 and the lower support plate 832. The support 830 can absorb vibration by friction energy consumption under earthquakes, and can also realize self-reset after friction pendulum vibration. The damper 10 is wear-resistant and low-damage, and can be repaired and replaced simply, economically and efficiently, and can be limited under large earthquakes to limit the positions of the upper support plate 831 and the lower support plate 832.
[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A self-resetting friction damper, characterized in that: It comprises a fixed plate (100), a movable plate (200), a guide member (300) and an elastic device (400), wherein: The fixed plate (100) and the movable plate (200) are arranged to overlap along a first direction, and the movable plate (200) is movably arranged relative to the fixed plate (100) along a second direction, and the second direction intersects with the first direction; The guide member (300) cooperates with the fixed plate (100) in a guiding manner, and is used to guide the fixed plate (100) to move along the first direction when the movable plate (200) moves relative to the fixed plate (100) along the second direction; The elastic device (400) is connected to the fixed plate (100) and is used to apply a pre-tightening force to the fixed plate (100) when the movable plate (200) moves relative to the fixed plate (100) along a second direction, so that the fixed plate (100) abuts against the movable plate (200); At least one of the fixed plate (100) and the movable plate (200) is provided with a push-up surface (500) on its opposite surface. The push-up surface (500) is used to convert the preload force into a reset force applied to the movable plate (200) along the second direction when the movable plate (200) moves relative to the fixed plate (100) along the second direction, so as to reset the movable plate (200).
2. A self-resetting friction damper according to claim 1, characterized in that: The guide member (300) passes through the fixed plate (100) and the movable plate (200) at the same time.
3. A self-resetting friction damper according to claim 2, characterized in that: The elastic device (400) is sleeved on the portion of the guide member (300) exposed from the fixing plate (100), and the elastic device (400) is fixed between the guide member (300) and the fixing plate (100).
4. A self-resetting friction damper according to claim 1, characterized in that: There are two movable plates (200), the two movable plates (200) are arranged along the second direction, and in the second direction, there is a movable gap between the two movable plates (200).
5. A self-resetting friction damper according to claim 1, characterized in that: There are two fixed plates (100), and the two fixed plates (100) are respectively located on both sides of the movable plate (200).
6. A self-resetting friction damper according to claim 1, characterized in that: One of the fixed plate (100) and the movable plate (200) is provided with a pushing protrusion (610), and the other is provided with a pushing groove (620) matched with the pushing protrusion (610), and the surface facing each other between the pushing protrusion (610) and the pushing groove (620) is the pushing surface (500).
7. A self-resetting friction damper according to claim 6, characterized in that: The guide member (300) passes through the fixed plate (100) and the movable plate (200) at the same time, the elastic device (400) is sleeved on the portion of the guide member (300) exposed from the fixed plate (100), and the elastic device (400) is fixed between the guide member (300) and the fixed plate (100); The guide member (300) is disposed through a portion of the fixed plate (100) where the push-up protrusion (610) or the push-up groove (620) is provided, and the guide member (300) is disposed through a portion of the movable plate (200) where the push-up protrusion (610) or the push-up groove (620) is provided.
8. A self-resetting friction damper according to claim 7, characterized in that: The movable plate (200) is provided with the pushing protrusion (610), the fixed plate (100) is provided with the pushing groove (620), and along the first direction, the length of the guide member (300) passing through the movable plate (200) is greater than or equal to the length of the guide member (300) passing through the fixed plate (100).
9. A beam-falling prevention device, characterized in that: The damper (10) comprises the damper (10) according to any one of claims 1 to 8, wherein the damper (10) is connected between a bridge (810) and a pier (820).
10. A friction pendulum spherical bearing, characterized in that: It comprises the damper (10) according to any one of claims 1 to 8, wherein the damper (10) is connected between an upper support plate (831) and a lower support plate (832) of the support (830).