An overload protection damper

Abstract

This invention provides an overload protection damper, comprising a viscous damper and an overload protection assembly. The invention features a fixed member fixedly connected to the piston rod or cylinder, and a sliding member slidably disposed on one side of the fixed member. The sliding member and the fixed member form a friction pair via a friction assembly, creating friction between them. During normal use, when the load is within the viscous damper's load range, the piston rod slides relative to the cylinder to buffer the load, and the relative positions of the fixed member and the sliding member remain unchanged. However, when the load exceeds the friction between the sliding member and the fixed member, relative displacement occurs, providing overload protection. This prevents excessive earthquake impact from causing the damper's force to exceed its limit, resulting in damper damage or connection failure, thus enhancing the stability of the building.

Description

Technical Field

[0001] This utility model belongs to the field of damper technology, specifically relating to an overload protection type damper. Background Technology

[0002] In the construction industry, dampers are devices that improve structural safety and comfort by dissipating energy and reducing vibration. They are widely used in high-rise buildings, long-span bridges, seismic-resistant structures, and special engineering projects. Currently, viscous dampers are mostly used as seismic dampers in buildings. The damping force of a viscous damper is related to velocity; the greater the velocity, the greater the damping force. However, when the damper is subjected to a large external force, it may exceed the design damping force, resulting in overload. This can easily lead to damper failure and also cause problems such as amplified building vibrations and uncontrolled displacement. Utility Model Content

[0003] This utility model provides an overload protection damper, which aims to solve the problem of damping force overload caused by excessive external forces in the use of existing building dampers.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide an overload protection damper, including a viscous damper and an overload protection component connected to the viscous damper; The viscous damper includes a cylinder, a piston rod slidably disposed inside the cylinder, and a damping medium located inside the cylinder. The sliding direction of the piston rod is defined as a first direction. One end of the piston rod extends into the cylinder and forms a sealed cavity with the cylinder. The damping medium fills the sealed cavity. When the piston rod moves relative to the cylinder, it generates a viscous damping force by shearing the damping medium. The overload protection assembly includes a fixed member, a sliding member, and a friction assembly; the fixed member is fixedly mounted on the piston rod or the cylinder; the sliding member has a degree of freedom to slide in a first direction relative to the fixed member; the friction assembly is disposed between the fixed member and the sliding member, so that the fixed member and the sliding member form a friction pair. When the working resistance of the viscous damper reaches a preset threshold, the overload protection component limits the increase of the viscous damper force value and provides a constant damping force to achieve overload protection.

[0005] In one possible implementation, the number of fixing members is two, the sliding member is located between the two fixing members, and the friction assembly includes a first friction plate located between the fixing members and the sliding member.

[0006] In one possible implementation, an adjustment component for adjusting the friction between the two fixing members and the sliding member is further provided between the fixing member and the sliding member.

[0007] In one possible implementation, the regulating component includes: Extrusion plates are provided on the outer sides of both of the fixing members; Tighten the bolts; the extrusion plates and the sliding parts are installed through both sides of the fixing member; The tightening nut, threadedly connected to the tightening bolt, is used to tighten the extrusion plate toward the fixing member.

[0008] In one possible implementation, a second friction plate is provided between the extrusion plate and the fixing member to increase the friction between the extrusion plate and the fixing member.

[0009] In one possible implementation, an elastic pressure plate is provided on the outer side of the extrusion plate, and the tightening bolt and the tightening nut respectively abut against the corresponding elastic pressure plate.

[0010] In one possible implementation, the adjustment components are in multiple sets, and the multiple sets of adjustment components are arranged at intervals along the length or width direction of the fixing member.

[0011] In one possible implementation, the fastener has multiple layers of the extrusion plates on one side, and a sliding member is provided between two adjacent extrusion plates.

[0012] In one possible implementation, the sliding member is provided on both sides of the fixing member, and the fixing member is threaded with a clamping bolt for tightening the sliding member onto the fixing member.

[0013] The solution shown in this application, compared with the prior art, incorporates a viscous damper. The viscous damper includes a cylinder and a piston rod slidably disposed within the cylinder. The cylinder contains a sealed piston chamber, and the piston rod has a piston fixedly mounted in the middle, slidably disposed within the piston chamber. This application uses a fixed member connected to the piston rod or cylinder, with a sliding member slidably disposed on one side of the fixed member. The sliding member and the fixed member form a friction pair via a friction assembly, creating a certain frictional force between them. During normal use, when the force is within the load range of the viscous damper, the piston rod slides relative to the cylinder to buffer the force, and the relative positions of the fixed member and the sliding member remain unchanged. However, when the force exceeds the frictional force between the sliding member and the fixed member, the fixed member and the sliding member undergo relative displacement. The overload protection assembly exhibits constant sliding friction, thus creating an overload protection effect. This prevents excessive earthquake impact from causing the damper force to exceed its limit, resulting in damper damage or connection failure, and enhances the stability of the building. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overload protection damper structure provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the connection structure between the fixing member and the sliding member provided in the first embodiment of the present utility model; Figure 3 This is a schematic diagram of the connection structure between the fixing member and the sliding member provided in the second embodiment of the present utility model; Figure 4 This is a schematic diagram of the connection structure between the fixing member and the sliding member provided in the third embodiment of this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. Viscous damper; 11. Cylinder body; 12. Piston rod; 2. Fixing component; 3. Sliding component; 4. Friction assembly; 41. First friction plate; 5. Adjusting assembly; 51. Extrusion plate; 52. Tightening bolt; 53. Tightening nut; 54. Elastic pressure plate; 6. Second friction plate; 7. Pressure bolt. Detailed Implementation

[0016] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] Please refer to the following: Figures 1 to 4 The overload protection damper provided by this utility model will now be described. The overload protection damper includes a viscous damper 1 and an overload protection assembly connected to the viscous damper 1. The viscous damper 1 includes a cylinder 11, a piston rod 12 slidably disposed inside the cylinder 11, and a damping medium located inside the cylinder 11. The sliding direction of the piston rod 12 is defined as a first direction. One end of the piston rod 12 extends into the cylinder 11 and forms a sealed cavity with the cylinder. The damping medium fills the sealed cavity. When the piston rod moves relative to the cylinder, it generates viscous resistance by shearing the damping medium. The overload protection assembly includes a fixed member 2, a sliding member 3, and a friction assembly 4. The fixed member 2 is fixedly installed on the piston rod 12 or the cylinder 11. The sliding member 3 has a degree of freedom to slide in a first direction relative to the fixed member 2. The friction assembly 4 is disposed between the fixed member 2 and the sliding member 3, so that the fixed member 2 and the sliding member 3 form a friction pair. When the working resistance of the viscous damper 1 reaches a preset threshold, the overload protection assembly limits the increase of the viscous damper force 1 value, providing a constant damping force to achieve overload protection.

[0018] The overload protection damper provided in this embodiment, compared with the prior art, incorporates a viscous damper 1. The viscous damper 1 includes a cylinder 11 and a piston rod 12 slidably disposed inside the cylinder 11. The cylinder 11 is a cylinder body with a sealed piston chamber inside. The piston rod 12 is a piston rod with a piston slidably disposed inside the piston chamber, fixedly mounted at the middle of the piston rod 12. In this application, a fixing member 2 is fixedly connected to the piston rod 12 or the cylinder 11, and a sliding member 3 is slidably disposed on one side of the fixing member 2. The sliding member 3 and the fixing member 2 form a friction pair through a friction assembly 4, thereby creating a certain frictional force between the sliding member 3 and the fixing member 2. During normal use, when the force range is within the load range of the viscous damper 1, the piston rod 12 slides relative to the cylinder 11 to buffer the force, and the relative positions of the fixing member 2 and the sliding member 3 do not change. When the force exceeds the friction between the sliding member 3 and the fixed member 2, the fixed member 2 and the sliding member 3 undergo relative displacement. The overload protection component exhibits constant sliding friction, thus creating an overload protection effect. This prevents excessive earthquake impact from causing the damper force to exceed its limit, resulting in damper damage or connection failure, thereby enhancing the stability of the building.

[0019] Specifically, in this embodiment, when the fixing member 2 is installed on the piston rod 12, a connection end for connecting to the outside is provided on the fixing member 2 and the cylinder 11 respectively; when the fixing member 2 is installed on the cylinder 11, a connection end for connecting to the outside is provided on the fixing member 2 and the piston rod 12.

[0020] Specifically, in this embodiment, a viscous damper is used. By connecting an overload protection component to the viscous damper, when subjected to a large external force, the overload protection component can offset part of the force, thereby preventing the damper from being damaged or the connection from failing due to excessive earthquake impact.

[0021] Specifically, in this embodiment, the viscous damper 1 is combined with the overload protection component to form a composite damper assembly.

[0022] In some embodiments, the friction component 4 described above can be as follows: Figure 2 , Figure 3 The structure shown. See also... Figure 2 , Figure 3The system comprises two fixed members 2, with a sliding member 3 located between them. The friction assembly 4 includes a first friction plate 41 positioned between the fixed members 2 and the sliding member 3. Both fixed members 2 and the sliding member 3 are plate-shaped structures. The two fixed members 2 are spaced apart and mounted on the piston rod 12 or cylinder 11, forming an installation gap for mounting the sliding member 3. The sliding member 3 is slidably positioned between the two fixed members 2, and the first friction plate 41 is fixedly mounted on the side of the sliding member 3 or fixed member 2. The first friction plate 41 increases the friction between the sliding member 3 and the fixed members 2. Therefore, under normal load, the relative position of the fixed members 2 and the sliding member 3 remains unchanged, and the relative displacement between the piston rod 12 and the cylinder 11 provides damping. When the damping force reaches the frictional resistance value between the sliding member 3 and the fixed members 2, the fixed members 2 and the sliding member 3 undergo relative displacement. The entire damper then exhibits the characteristics of frictional damping, with a constant force value, achieving overload protection characteristics where the force value does not exceed the designed damping force after speed overload.

[0023] Preferably, in this embodiment, a metal plate is fixedly installed on the side of the fixing member 2, a first friction plate 41 is fixedly installed on the sliding member 3, and a limiting strip for limiting the movement of the first friction plate 41 along a first direction is also fixedly installed on the sliding member 3, thereby improving the stability of the installation position of the first friction plate 41 on the sliding member 3. The friction force between the sliding member 3 and the fixing member 2 is increased through the friction pair generated between the metal plate and the first friction plate 41.

[0024] In some embodiments, the aforementioned fastener 2 may be adopted as follows: Figure 2 The structure shown. See also Figure 2 An adjusting component 5 is also provided between the fixing member 2 and the sliding member 3 to adjust the friction between the two fixing members 2 and the sliding member 3. The adjusting component 5 is used to adjust the pressing force between the fixing member 2 and the sliding member 3, thereby changing the friction between the fixing member 2 and the sliding member 3 by changing the pressing force.

[0025] Specifically, in this embodiment, the friction between the sliding member 3 and the fixed member 2 can be adjusted according to the load on the viscous damper 1 and the external working environment. Both the fixed member 2 and the sliding member 3 are plate-shaped structures, which can change the relative compressive force according to their own deformation, thereby realizing the adjustment of friction.

[0026] In some embodiments, the adjustment component 5 described above may employ, for example... Figure 2 The structure shown. See also Figure 2The adjusting assembly 5 includes a pressing plate 51, a tightening bolt 52, and a tightening nut 53. Pressing plates 51 are provided on the outer sides of both fixing members 2; the tightening bolt 52 passes through the pressing plates 51 and the sliding member 3 on both sides of the fixing member 2; the tightening nut 53 is threadedly connected to the tightening bolt 52 and is used to tighten the pressing plates 51 towards the fixing member 2. When the sliding member 3 is located between the two fixing members 2, a through hole for the tightening bolt 52 is provided on the sliding member 3, and an elongated hole for slidingly engaging with the tightening bolt 52 is provided on the fixing member 2, the length of which is along a first direction. A circular through hole for installing the tightening bolt 52 is provided on the sliding member 3. When the sliding member 3 moves relative to the fixing member 2, the tightening bolt 52 and the tightening nut 53 can be displaced relative to the fixing member 2 through the sliding member 3.

[0027] Preferably, in this embodiment, a pressing plate 51 is provided on the outer side of the two fixing members 2. The pressing plate 51 is used to press against the outer wall of the fixing member 2, and a through hole for installing a tightening bolt 52 is provided on the pressing plate 51. The tightening bolt 52 is slidably disposed inside the through hole, so that when the sliding member 3 drives the tightening bolt 52 to move relative to the fixing member 2 in the first direction, the tightening bolt 52 can drive the pressing plate 51 to move relative to the fixing member 2 in the first direction. The pressing plate 51 and the sliding member 3 are respectively located on both sides of the fixing member 2. The setting of the pressing plate 51 can increase the frictional force when the sliding member 3 and the fixing member 2 move relative to each other. At the same time, the fixing member 2 is pressed between the sliding member 3 and the pressing plate 51, which can prevent the fixing member 2 from deforming and affecting the relative movement between the fixing member 2 and the sliding member 3.

[0028] In some embodiments, the extrusion plate 51 may be as follows: Figure 2 The structure shown. See also Figure 2 A second friction plate 6 is provided between the extrusion plate 51 and the fixing member 2 to increase the friction between them. The second friction plate 6 is fixedly installed on the extrusion plate 51 or the fixing member 2. The second friction plate 6 increases the friction between the extrusion plate 51 and the fixing member 2. Preferably, the second friction plate 6 is fixedly installed on the extrusion plate 51, the first friction plate 41 is fixedly installed on both sides of the sliding member 3, and metal plates that slide with the first friction plate 41 and the second friction plate 6 are installed on both sides of the fixing member 2. The arrangement of the metal plates, the first friction plate 41, and the second friction plate 6 avoids damage to the fixing member 2, the sliding member 3, and the extrusion plate 51, facilitating future maintenance of the fixing member 2 and the sliding member 3.

[0029] Preferably, in this embodiment, the extrusion plate 51 is extruded and installed on the outside of the fixing member 2 by tightening bolts 52. Friction damping can be achieved by the friction between the sliding member 3 and the fixing member 2, or by the friction between the extrusion plate 51 and the fixing member 2. It can still play a role in friction damping after unilateral failure.

[0030] In some embodiments, the extrusion plate 51 may be as follows: Figure 2 , Figure 3 The structure shown. See also... Figure 2 , Figure 3 Elastic pressure plates 54 are provided on the outer side of the extrusion plate 51, and the tightening bolt 52 and tightening nut 53 abut against the corresponding elastic pressure plates 54. Elastic pressure plates 54 are also provided on the outer surfaces of the two outermost extrusion plates 51, and the heads of the tightening bolts 52 and the tightening nuts 53 abut against the two elastic pressure plates 54 respectively. The design of the elastic pressure plates 54 serves two purposes: firstly, it prevents the tightening nuts 53 from loosening from the tightening bolts 52; secondly, the elastic pressure plates 54 also provide a certain tightening effect. After the first friction plate 41 and the second friction plate 6 wear, the elastic pressure plates 54 can generate a certain frictional force between the first friction plate 41 and the second friction plate 6, ensuring stable frictional damping between the fixed part 2 and the sliding part 3.

[0031] Specifically, in this embodiment, the elastic pressure plate 54 adopts a conical structure, with the smaller outer diameter end abutting against the tightening bolt 52 or the tightening nut 53.

[0032] In some embodiments, the adjustment component 5 described above may employ, for example... Figure 3 The structure shown. See also Figure 3 The adjusting components 5 are arranged in multiple groups, spaced apart along the length or width of the fixed component 2. These multiple groups of adjusting components 5 are arrayed on the outer side of the fixed component 2. This arrangement increases the friction between the fixed component 2 and the sliding component 3, and also ensures uniform force distribution across multiple parts of the fixed component 2. During relative displacement between the fixed component 2 and the sliding component 3, a relatively stable frictional force is maintained between the fixed component 2 and the friction element, ensuring stable frictional damping. This prevents a decrease in friction between the fixed component 2 and the sliding component 3 after changes in relative displacement, which could lead to increased force at the viscous damper 1 and overload. This improves stability during use.

[0033] Specifically, in this embodiment, the fixing member 2 is a rectangular plate-like structure, and its length direction or width direction is set along the first direction. When the length direction of the fixing member 2 is set along the first direction, the relative travel distance between the fixing member 2 and the sliding member 3 can be increased. When the width direction of the fixing member 2 is set along the first direction, a certain effective area can be guaranteed even when the fixing member 2 and the sliding member 3 are misaligned in the first direction. Furthermore, the arrangement of multiple sets of adjustment components 5 can ensure that the friction between the fixing member 2 and the sliding member is within a certain effective range.

[0034] Preferably, in this embodiment, the first friction plate 41 is fixedly installed on the sliding member 3, and when the sliding member 3 is displaced relative to the fixed member 2, the first friction plate 41 is always within the coverage area of ​​the fixed member 2, so that a relatively stable friction force can be maintained during the relative displacement between the fixed member 2 and the sliding member 3, thereby providing stable friction damping.

[0035] In some embodiments, the extrusion plate 51 may be as follows: Figure 2 , Figure 3 The structure shown. See also... Figure 2 , Figure 3 The fixing member 2 has multiple layers of extrusion plates 51 on one side, and a sliding member 3 is provided between two adjacent extrusion plates 51. Multiple layers of extrusion plates 51 are spaced apart, and a sliding member 3 is provided between two adjacent extrusion plates 51. A third friction plate is provided between the sliding member 3 and the extrusion plate 51. Through the design of the multiple layers of extrusion plates 51, the number of sliding members 3 can be freely increased according to the design requirements of friction damping, thereby increasing the value of friction damping.

[0036] Specifically, in this embodiment, a pad is installed between two adjacent extrusion plates 51, and third friction plates are fixedly installed on both sides of the pad. Metal plates are fixedly installed on the corresponding sides of the extrusion plates 51. The pad has mounting holes for installing tightening bolts 52 or clamping bolts 7, thereby limiting the position of the pad by the tightening bolts 52 or clamping bolts 7, ensuring the relative position of the pad and the fixing member 2 is stable. When the external force exceeds the frictional force between the extrusion plates 51 and the pad, the sliding member 3 can undergo relative displacement relative to the pad and the fixing member 2.

[0037] In some embodiments, the fixing member 2 and the sliding member 3 can be adopted as follows: Figure 4 The structure shown. See also Figure 4Both sides of the fixing member 2 are provided with sliding members 3, and the fixing member 2 is threadedly connected with a clamping bolt 7 for tightening the sliding member 3 onto the fixing member 2. In this embodiment, sliding members 3 are respectively installed on opposite sides of the fixing member 2, and the sliding members 3 are tightened onto the fixing member 2 by the clamping bolt 7, thereby forming a friction pair between the sliding member 3 and the fixing member 2. An elongated hole is provided on the sliding member 3 for installing the clamping bolt 7, thereby allowing the sliding member 3 to move relative to the fixing member 2.

[0038] Specifically, in this embodiment, connecting ends for connecting to the outside are fixedly connected between multiple sliding members 3, and a connecting section for connecting to the outside is provided on the piston rod 12 of the viscous damper 1, so that there is both speed-related working damping and speed-independent frictional damping between the two connecting ends. This allows the entire damper to be applicable to different working conditions and improves the effective damping effect on the building during vibration.

[0039] Specifically, in this embodiment, the cylinder 11 of the viscous damper 1 is a sleeve structure, and two sealing plugs are installed at intervals along the first direction inside the cylinder 11. The piston on the piston rod 12 is located between the two sealing plugs, and the piston rod 12 is slidably disposed on the two sealing plugs and is sealed to the sealing plugs.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An overload protection damper, characterized in that, Includes a viscous damper (1) and an overload protection assembly connected to the viscous damper (1); The viscous damper (1) includes a cylinder (11), a piston rod (12) slidably disposed inside the cylinder (11), and a damping medium located inside the cylinder (11). The sliding direction of the piston rod (12) is defined as the first direction. One end of the piston rod (12) extends into the cylinder (11) and forms a sealed cavity with the cylinder. The damping medium fills the sealed cavity. When the piston rod moves relative to the cylinder, it generates a viscous damping force by shearing the damping medium. The overload protection assembly includes a fixing member (2), a sliding member (3), and a friction assembly (4); the fixing member (2) is fixedly installed on the piston rod (12) or the cylinder (11); the sliding member (3) has a degree of freedom to slide in a first direction relative to the fixing member (2); the friction assembly (4) is disposed between the fixing member (2) and the sliding member (3), so that the fixing member (2) and the sliding member (3) form a friction pair; When the working resistance of the viscous damper (1) reaches a preset threshold, the overload protection component limits the increase of the force value of the viscous damper (1) and provides a constant damping force to achieve overload protection.

2. The overload protection damper as described in claim 1, characterized in that, The number of the fixing members (2) is two, the sliding member (3) is located between the two fixing members (2), and the friction assembly (4) includes a first friction piece (41) located between the fixing member (2) and the sliding member (3).

3. The overload protection damper as described in claim 2, characterized in that, An adjustment component (5) for adjusting the friction between the two fixed members (2) and the sliding member (3) is also provided between the fixed member (2) and the sliding member (3).

4. The overload protection damper as described in claim 3, characterized in that, The adjustment component (5) includes: The extrusion plate (51) is provided on the outer side of both of the two fixing members (2); Tightening bolts (52) are provided through the extrusion plates (51) on both sides of the fixing member (2) and the sliding member (3); The tightening nut (53) is threadedly connected to the tightening bolt (52) and is used to tighten the extrusion plate (51) toward the fixing member (2).

5. The overload protection damper as described in claim 4, characterized in that, A second friction plate (6) is provided between the extrusion plate (51) and the fixing member (2) to increase the friction between the extrusion plate (51) and the fixing member (2).

6. The overload protection damper as described in claim 4 or 5, characterized in that, An elastic pressure plate (54) is provided on the outer side of the extrusion plate (51), and the tightening bolt (52) and the tightening nut (53) abut against the corresponding elastic pressure plate (54).

7. The overload protection damper as described in claim 3, characterized in that, The adjustment components (5) are in multiple sets, and the multiple sets of adjustment components (5) are arranged at intervals along the length or width direction of the fixing member (2).

8. The overload protection damper as described in claim 4, characterized in that, The fastener (2) has multiple layers of extrusion plates (51) on one side, and the sliding member (3) is provided between two adjacent extrusion plates (51).

9. The overload protection damper as described in claim 1, characterized in that, The fixing member (2) is provided with the sliding member (3) on both sides, and the fixing member (2) is threaded with a clamping bolt (7) for tightening the sliding member (3) on the fixing member (2).

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