Overload protection type damper

Abstract

The invention provides an overload protection type damper, and belongs to the technical field of dampers, and the overload protection type damper comprises a viscous damper and an overload protection assembly. The fixed part is fixedly connected to the piston rod or the cylinder body, the sliding part is arranged on one side of the fixed part in a sliding mode, and the friction pair is formed between the sliding part and the fixed part through the friction assembly, so that certain friction force exists between the sliding part and the fixed part. During normal use, when the stress range is within the loading range of the viscous damper, the piston rod slides relative to the cylinder body to buffer stress, and the relative positions of the fixed part and the sliding part are not changed. And when the stress exceeds the friction force between the sliding piece and the fixed piece, the fixed piece and the sliding piece generate relative displacement to form overload protection. Damage or connection failure of the damper caused by the fact that the force value of the damper exceeds the limit due to too large earthquake impact is avoided, and the stability of a building is enhanced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of damper, and particularly relates to an overload protection type damper. BACKGROUND

[0002] In the field of construction, a damper is a device for improving structural safety and comfort through energy dissipation and vibration reduction, and is widely used in high-rise buildings, large-span bridges, seismic structures and special engineering. At present, viscous dampers are mostly used as seismic dampers in the field of construction. The damping force of the viscous damper is related to the speed, and the greater the speed, the greater the damping force of the damper. However, when the damper is subjected to a large external force, the design damping force will be exceeded, and an overload phenomenon will occur. This can easily cause the damper to fail, and also cause the building to vibrate and the displacement to be out of control. SUMMARY

[0003] The present application provides an overload protection type damper, which can solve the problem of excessive damping force caused by excessive external force in the prior art.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is to provide an overload protection type damper, comprising a viscous damper and an overload protection assembly connected with the viscous damper. The viscous damper comprises a cylinder body, a piston rod slidingly arranged in the cylinder body, and a damping medium located in the cylinder body. The sliding direction of the piston rod is defined as the first direction. One end of the piston rod extends into the cylinder body and forms a sealed cavity with the cylinder body. The damping medium is filled in the sealed cavity. When the piston rod moves relative to the cylinder body, viscous damping force is generated by shearing the damping medium. The overload protection assembly comprises a fixed part, a sliding part and a friction assembly. The fixed part is fixedly installed on the piston rod or the cylinder body. The sliding part has a degree of freedom of sliding in the first direction relative to the fixed part. The friction assembly is arranged between the fixed part and the sliding part, so as to form a friction pair between the fixed part and the sliding part. When the working resistance of the viscous damper reaches a preset threshold value, the overload protection assembly limits the increase of the viscous damper force value and provides a constant damping force to realize overload protection.

[0005] In a possible implementation manner, the number of the fixed parts is two, and the sliding part is located between the two fixed parts. The friction assembly comprises a first friction plate located between the fixed part and the sliding part.

[0006] In a possible implementation manner, an adjusting assembly for adjusting the friction force between the two fixed parts and the sliding part is further arranged between the fixed part and the sliding part.

[0007] In a possible implementation, the adjusting assembly comprises: a pressing plate, the outer side of each of the two fixing members is provided with the pressing plate; a tightening bolt, penetrating through the pressing plates on both sides of the fixing member and the sliding member; a tightening nut, in threaded connection with the tightening bolt, used to tighten the pressing plates towards the fixing member.

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

[0009] In a possible implementation, the outer side of the pressing plate is provided with elastic pressing plates, and the tightening bolt and the tightening nut are respectively abutted against corresponding elastic pressing plates.

[0010] In a possible implementation, the adjusting assembly is multiple sets, and the multiple sets of adjusting assemblies are arranged at intervals along the length direction or the width direction of the fixing member.

[0011] In a possible implementation, one side of the fixing member is provided with multiple layers of the pressing plate, and a sliding member is arranged between adjacent two pressing plates.

[0012] In a possible implementation, both sides of the fixing member are provided with the sliding member, and a pressing bolt is threadedly connected on the fixing member to tighten the sliding member on the fixing member.

[0013] In a possible implementation, the number of the sliding members is multiple, a resistance plate is arranged between adjacent two sliding members, and both ends of the sliding member along the first direction are arranged to be inclined towards the resistance plate.

[0014] Compared with the prior art, the scheme shown in the embodiment of the application has the viscous damper, the viscous damper comprises a cylinder and a piston rod slidingly arranged in the cylinder. The cylinder is a cylinder, a sealed piston cavity is arranged in the cylinder, the piston rod is a piston rod, and a piston is fixedly installed at the middle part of the piston rod and slidingly arranged in the piston cavity. In the application, a fixing member is fixedly connected to the piston rod or the cylinder, a sliding member is slidingly arranged on one side of the fixing member, and the sliding member and the fixing member form a friction pair through a friction assembly, so that a certain friction force exists between the sliding member and the fixing member. In normal use, when the stress range is within the load range of the viscous damper, the piston rod slides relative to the cylinder to buffer the stress, and the relative position of the fixing member and the sliding member does not change. When the stress exceeds the friction force between the fixing member and the sliding member, the fixing member and the sliding member are relatively displaced, the overload protection assembly as a whole exhibits a constant sliding friction force, and an overload protection effect is formed. The impact of the earthquake is avoided to be too large to cause the damper to be damaged or the connection to be invalid, and the stability of the building body is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The overload protection type damper structure schematic diagram provided by the embodiment of the application is shown. Figure 2 The connection structure schematic diagram of the fixing member and the sliding member provided by the first embodiment of the application is shown. Figure 3 The connection structure schematic diagram of the fixing member and the sliding member provided by the second embodiment of the application is shown. Figure 4 The connection structure schematic diagram of the fixing member and the sliding member provided by the third embodiment of the application is shown.

[0016] BRIEF DESCRIPTION OF DRAWINGS 1, viscous damper; 11, cylinder; 12, piston rod; 2, fixing member; 3, sliding member; 4, friction assembly; 41, first friction plate; 5, adjusting assembly; 51, extrusion plate; 52, tightening bolt; 53, tightening nut; 54, elastic pressing piece; 6, second friction plate; 7, pressing bolt; 8, resistance plate. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects of the application clearer, the application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and do not limit the application.

[0018] Please refer to Figures 1 to 4The overload protection type damper provided by the present application is described as follows. The overload protection type damper comprises a viscous damper 1 and an overload protection assembly connected with the viscous damper 1. The viscous damper 1 comprises a cylinder body 11, a piston rod 12 slidingly arranged in the cylinder body 11, and a damping medium arranged in the cylinder body 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 body 11 and forms a sealed cavity with the cylinder body. The damping medium is filled in the sealed cavity. When the piston rod moves relative to the cylinder body, viscous damping force is generated by shearing the damping medium. The overload protection assembly comprises 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 body 11. The sliding member 3 has a sliding degree along the first direction relative to the fixing member 2. The friction assembly 4 is arranged 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 value, the overload protection assembly limits the increase of the viscous damper force 1 and provides a constant damping force to achieve overload protection.

[0019] Compared with the prior art, the overload protection type damper provided by the present embodiment comprises the viscous damper 1, the viscous damper 1 comprises the cylinder body 11 and the piston rod 12 slidingly arranged in the cylinder body 11. The cylinder body 11 is a cylinder body, a sealed piston cavity is arranged in the cylinder body, the piston rod 12 is a piston rod, and a piston is fixedly installed on the middle part of the piston rod 12 and slidingly arranged in the piston cavity. In the present application, the fixing member 2 is fixedly connected on the piston rod 12 or the cylinder body 11, the sliding member 3 is slidingly arranged on one side of the fixing member 2, and the friction assembly 4 is arranged between the fixing member 2 and the sliding member 3 to form a friction pair, so that a certain friction force exists between the fixing member 2 and the sliding member 3. In normal use, when the stress range is within the load range of the viscous damper 1, the piston rod 12 slides relative to the cylinder body 11 to buffer the stress, and the relative position of the fixing member 2 and the sliding member 3 does not change. When the stress exceeds the friction force between the fixing member 2 and the sliding member 3, the fixing member 2 and the sliding member 3 are relatively displaced, the overall overload protection assembly exhibits constant sliding friction force, and the overload protection effect is formed. The damage or connection failure of the damper caused by the impact of the earthquake being too large is avoided, and the stability of the building body is improved.

[0020] Specifically, in the present embodiment, when the fixing member 2 is installed on the piston rod 12, the fixing member 2 and the cylinder body 11 are respectively provided with connection ends connected with the outside. When the fixing member 2 is installed on the cylinder body 11, the fixing member 2 and the piston rod 12 are provided with connection ends connected with the outside.

[0021] Specifically, in the embodiment, the viscous damper is used as the viscous damper. By connecting the overload protection assembly on the viscous damper, when a large external force is applied, the overload protection assembly can offset part of the force, thereby avoiding the damage or connection failure of the damper caused by the excessive force value of the damper due to the impact of the earthquake.

[0022] Specifically, in the embodiment, the viscous damper 1 is combined with the overload protection assembly to form a composite damper assembly.

[0023] Optionally, in the embodiment, the sliding member 3 is designed in parallel with the fixed member 2, so that a stable friction force is generated between the sliding member 3 and the fixed member 2.

[0024] In some embodiments, the above-mentioned friction assembly 4 can adopt the structure as shown in Figure 2 、 Figure 3 . Referring to Figure 2 、 Figure 3 , the number of fixed members 2 is two, the sliding member 3 is located between the two fixed members 2, and the friction assembly 4 includes a first friction plate 41 located between the fixed member 2 and the sliding member 3. The number of fixed members 2 is two, and the sliding member 3 and the fixed member 2 are both plate-shaped structures. The two fixed members 2 are installed on the piston rod 12 or the cylinder body 11 with a spacing, forming an installation gap for installing the sliding member 3. The sliding member 3 is slidingly arranged between the two fixed members 2, and the first friction plate 41 is fixedly installed on the side surface of the sliding member 3 or the fixed member 2. The first friction plate 41 can increase the friction force between the sliding member 3 and the fixed member 2. Thus, under normal load, the relative position of the fixed member 2 and the sliding member 3 does not change, and the relative displacement of the piston rod 12 and the cylinder body 11 plays a damping role. When the damping force value reaches the friction resistance value between the sliding member 3 and the fixed member 2, the fixed member 2 and the sliding member 3 are relatively displaced, and the entire damper force value exhibits the characteristics of friction damping, the force value is constant, and the force value does not exceed the design damping force after overload protection.

[0025] Preferably, in the embodiment, a metal plate is fixedly installed on the side surface of the fixed member 2, the 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 in the 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 fixed member 2 is increased by the friction pair generated between the metal plate and the first friction plate 41.

[0026] In some embodiments, the above-mentioned fixed member 2 can adopt the structure as shown in Figure 2 . Referring to Figure 2, the adjusting assembly 5 is arranged between the fixed members 2 and the sliding member 3, and is used for adjusting the friction between the fixed members 2 and the sliding member 3. The adjusting assembly 5 is arranged between the fixed members 2 and the sliding member 3, and is used for adjusting the extrusion force between the fixed members 2 and the sliding member 3, so as to change the friction between the fixed members 2 and the sliding member 3.

[0027] Specifically, in the embodiment, the friction between the fixed members 2 and the sliding member 3 can be adjusted according to the stress load of the viscous damper 1 and the working environment. The fixed members 2 and the sliding member 3 are both plate-shaped structures, so that the relative extrusion force can be changed according to the deformation of the fixed members 2 and the sliding member 3, so as to realize the adjustment of the friction.

[0028] In some embodiments, the adjusting assembly 5 can adopt the structure as shown in Figure 2 . Referring to Figure 2 , the adjusting assembly 5 comprises an extrusion plate 51, a tightening bolt 52 and a tightening nut 53. The outer sides of the two fixed members 2 are both provided with the extrusion plate 51; the tightening bolt 52 penetrates through the extrusion plates 51 on the two sides of the fixed members 2 and the sliding member 3; and the tightening nut 53 is threadedly connected with the tightening bolt 52, and is used for tightening the extrusion plate 51 towards the fixed members 2. When the sliding member 3 is located between the two fixed members 2, a through hole for penetrating the tightening bolt 52 is arranged on the sliding member 3, and a long hole for slidingly matching the tightening bolt 52 is arranged on the fixed member 2, and the length direction of the long hole is arranged along the first direction. A circular through hole for mounting the tightening bolt 52 is arranged on the sliding member 3. When the sliding member 3 moves relative to the fixed member 2, the tightening bolt 52 and the tightening nut 53 can be displaced relative to the fixed member 2 by the sliding member 3.

[0029] Preferably, in the embodiment, the extrusion plates 51 are arranged on the outer sides of the two fixed members 2, and are used for extruding on the outer side walls of the fixed members 2. The through holes for mounting the tightening bolts 52 are arranged on the extrusion plates 51, and the tightening bolts 52 are slidingly arranged in the through holes, so that when the sliding member 3 drives the tightening bolt 52 to be displaced relative to the fixed member 2 along the first direction, the tightening bolt 52 can drive the extrusion plate 51 to be displaced relative to the fixed member 2 along the first direction. The extrusion plate 51 and the sliding member 3 are respectively located on the two sides of the fixed member 2. By arranging the extrusion plate 51, the friction when the sliding member 3 is relatively displaced relative to the fixed member 2 can be increased. Meanwhile, the fixed member 2 is extruded between the sliding member 3 and the extrusion plate 51, so that the deformation of the fixed member 2 can be avoided, and the relative movement between the fixed member 2 and the sliding member 3 can be affected.

[0030] In some embodiments, the extrusion plate 51 can adopt the structure as shown in Figure 2 . Referring to Figure 2The second friction sheet 6 is arranged between the extrusion plate 51 and the fixing member 2 to increase the friction between the extrusion plate 51 and the fixing member 2. The second friction sheet 6 is fixedly installed on the extrusion plate 51 or the fixing member 2. The second friction sheet 6 can increase the friction between the extrusion plate 51 and the fixing member 2. Preferably, the second friction sheet 6 is fixedly installed on the extrusion plate 51, the first friction sheet 41 is fixedly installed on both sides of the sliding member 3, and the metal plate is installed on both sides of the fixing member 2 and is in sliding cooperation with the first friction sheet 41 and the second friction sheet 6. The metal plate, the first friction sheet 41 and the second friction sheet 6 can avoid damage to the fixing member 2, the sliding member 3 and the extrusion plate 51 and facilitate maintenance between the fixing member 2 and the sliding member 3.

[0031] Preferably, in the embodiment, the extrusion plate 51 is extruded and installed on the outer side of the fixing member 2 through the tightening bolt 52. The frictional damping can be realized through the friction between the sliding member 3 and the fixing member 2, or the frictional damping can be realized through the friction between the extrusion plate 51 and the fixing member 2. The extrusion plate 51 can still play a role in frictional damping after unilateral failure.

[0032] In some embodiments, the extrusion plate 51 can adopt the structure as shown in Figure 2 、 Figure 2 . Referring to Figure 2 、 Figure 3 , the outer side of the extrusion plate 51 is provided with an elastic pressing piece 54, and the tightening bolt 52 and the tightening nut 53 abut against the corresponding elastic pressing pieces 54. The outer sides of the two extrusion plates 51 on the outermost side are provided with elastic pressing pieces 54, and the head of the tightening bolt 52 and the tightening nut 53 abut against the two elastic pressing pieces 54. The elastic pressing piece 54 can prevent the tightening nut 53 and the tightening bolt 52 from loosening. Meanwhile, the elastic pressing piece 54 can also play a certain tightening role. After the first friction sheet 41 and the second friction sheet 6 are worn, the elastic pressing piece 54 can make the first friction sheet 41 and the second friction sheet 6 generate a certain friction force. The fixing member 2 and the sliding member 3 can always maintain stable frictional damping.

[0033] Specifically, in the embodiment, the elastic pressing piece 54 adopts a conical structure, and the smaller outer diameter end abuts against the tightening bolt 52 or the tightening nut 53.

[0034] In some embodiments, the adjusting assembly 5 can adopt the structure as shown in Figure 2 . Referring to Figure 3The adjusting assembly 5 is in multiple groups, and the multiple groups of adjusting assemblies 5 are arranged at intervals along the length direction or the width direction of the fixing member 2. The adjusting assembly 5 is in multiple groups, and the multiple groups of adjusting assemblies 5 are arranged in an array on the outer side of the fixing member 2, which can increase the friction force between the fixing member 2 and the sliding member 3, and at the same time, can make the force on multiple parts of the fixing member 2 uniform. During the relative displacement between the fixing member 2 and the sliding member 3, the relative stable friction force between the fixing member 2 and the friction member is maintained, and the stable friction damping is maintained. After the relative displacement between the fixing member 2 and the sliding member 3 changes, the friction force between the fixing member 2 and the sliding member 3 becomes small, which causes the overloading phenomenon of the viscous damper 1. The stability during use is improved.

[0035] Specifically, in the embodiment, the fixing member 2 is a rectangular plate structure, and the length direction of the fixing member 2 is arranged along the first direction or the width direction of the fixing member 2 is arranged along the first direction. When the length direction of the fixing member 2 is arranged along the first direction, the relative movement stroke between the fixing member 2 and the sliding member 3 can be increased, and when the width direction of the fixing member 2 is arranged along the first direction, a certain effective area can be ensured when the fixing member 2 and the sliding member 3 are misaligned in the first direction. And the arrangement of the multiple groups of adjusting assemblies 5 can ensure that the friction force between the fixing member 2 and the sliding member is within a certain effective range.

[0036] Preferably, in the 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 fixing member 2, the first friction plate 41 is always located within the coverage range of the fixing member 2 as a whole, so that during the relative displacement between the fixing member 2 and the sliding member 3, a relatively stable friction force can be maintained, thereby providing stable friction damping.

[0037] In some embodiments, the above-mentioned extrusion plate 51 can adopt the structure as shown in Figure 3 、 Figure 3 . Referring to Figure 2 、 Figure 3 , a plurality of extrusion plates 51 are arranged on one side of the fixing member 2, and the sliding member 3 is arranged between adjacent two extrusion plates 51. A plurality of extrusion plates 51 are arranged on one side of the fixing member 2, the plurality of extrusion plates 51 are arranged at intervals, and the sliding member 3 is arranged between adjacent two extrusion plates 51, and the third friction plate is arranged between the sliding member 3 and the extrusion plate 51. Through the design of the multiple extrusion plates 51, the number of sliding members 3 can be freely increased according to the design requirements of the friction damping, thereby increasing the value of the friction damping.

[0038] Specifically, in this embodiment, a backing plate is installed between two adjacent layers of extrusion plates 51, with third friction plates fixedly mounted on both sides of the backing plate. Metal plates are fixedly mounted on the corresponding side surfaces of the extrusion plates 51. The backing plate is provided with mounting holes for tightening bolts 52 or compression bolts 7. These tightening bolts 52 or compression bolts 7 can be used to limit the position of the backing plate, maintaining a stable relative position between the backing plate and the fixing member 2. When an external force greater than the friction between the extrusion plates 51 and the backing plate is applied, the sliding member 3 can be displaced relative to the backing plate and the fixing member 2.

[0039] In some embodiments, the fixing member 2 and the sliding member 3 may be formed as follows: Figure 2 See the structure shown. Figure 3 , a sliding member 3 is provided on both sides of the fixed member 2, and a clamping bolt 7 is threadedly connected to the fixed member 2 for tightening the sliding member 3 to the fixed member 2. In this embodiment, a sliding member 3 is mounted on opposite sides of the fixed member 2, and the sliding member 3 is tightened to the fixed member 2 by the clamping bolt 7, thereby forming a friction pair between the sliding member 3 and the fixed member 2. The sliding member 3 is provided with an elongated hole for installing the clamping bolt 7, so that the sliding member 3 can move relative to the fixed member 2.

[0040] Specifically, in this embodiment, connecting ends for external connection are fixedly connected between the multiple sliding members 3, and a connecting section for external connection is provided on the piston rod 12 of the viscous damper 1. This allows both speed-dependent operating damping and speed-independent friction damping to be provided between the two connecting ends. This allows the entire damper to be adapted to different operating conditions, effectively enhancing the damping effect on buildings during vibration.

[0041] Specifically, in this embodiment, the cylinder body 11 of the viscous damper 1 is a sleeve-type structure, and two sealing plugs are installed in the cylinder body 11 at intervals along the first direction. The piston on the piston rod 12 is located between the two sealing plugs, and the piston rod 12 is slidably set on the two sealing plugs and is sealed with the sealing plugs.

[0042] In some embodiments, the sliding member and the fixing member may be Figure 4 See the structure shown. Figure 4 Figure 4 Figure 4 There are multiple sliding members 3, and a resistance plate 8 is installed between two adjacent sliding members 3. The two ends of the sliding member 3 along the first direction are inclined toward the resistance plate 8. The resistance plate 8 is provided with a central hole for installing the clamping bolt 7, and a fourth friction plate 81 is installed on both sides of the resistance plate 8, so that a friction pair is formed between the resistance plate 8 and the sliding member 3.

[0043] Specifically, in this embodiment, the side of the slider 3 proximate to the resistance plate 8 is tilted toward the resistance plate 8. The two sliders 3 form a mounting gap for mounting the resistance plate 8. The size of the mounting gap gradually decreases from the middle toward the ends along the first direction. As a result, when the resistance plate 8 moves to the tilted position, the gap between the resistance plate 8 and the slider 3 is increased to offset the increased resistance. This further improves the stability of the connecting components and the viscous damper during use.

[0044] 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 scope of protection of the present invention.

Claims

1. An overload protection damper, characterized in that: It comprises a viscous damper (1) and an overload protection component connected to the viscous damper (1); The viscous damper (1) comprises a cylinder (11), a piston rod (12) slidably arranged 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 is filled in the sealed cavity; when the piston rod moves relative to the cylinder, a viscous damping force is generated by shearing the damping medium; The overload protection assembly comprises a fixed part (2), a sliding part (3) and a friction assembly (4); the fixed part (2) is fixedly mounted on the piston rod (12) or the cylinder body (11); the sliding part (3) has a degree of freedom to slide along a first direction relative to the fixed part (2); the friction assembly (4) is arranged between the fixed part (2) and the sliding part (3), so that the fixed part (2) and the sliding part (3) form a friction pair; When the working resistance of the viscous damper (1) reaches a preset threshold value, the overload protection component limits the increase in the force value of the viscous damper (1) and provides a constant damping force to achieve overload protection.

2. The overload protection damper according to claim 1, characterized in that: There are two fixing members (2), the sliding member (3) is located between the two fixing members (2), and the friction assembly (4) includes a first friction plate (41) located between the fixing member (2) and the sliding member (3).

3. The overload protection damper according to claim 2, characterized in that: An adjustment component (5) for adjusting the friction force between the two fixing members (2) and the sliding member (3) is also provided between the fixing member (2) and the sliding member (3).

4. The overload protection damper according to claim 3, characterized in that: The regulating component (5) comprises: An extrusion plate (51), the outer sides of the two fixing members (2) are both provided with the extrusion plate (51); 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) in a direction close to the fixing member (2).

5. The overload protection damper according to claim 4, characterized in that: A second friction plate (6) is provided between the extrusion plate (51) and the fixing member (2) for increasing the friction force between the extrusion plate (51) and the fixing member (2).

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

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

8. The overload protection damper according to claim 4, characterized in that: Multiple layers of the extrusion plates (51) are provided on one side of the fixing member (2), and the sliding member (3) is provided between two adjacent extrusion plates (51).

9. The overload protection damper according to claim 1, characterized in that: The sliding members (3) are provided on both sides of the fixing member (2), and a clamping bolt (7) for tightening the sliding member (3) on the fixing member (2) is threadedly connected.

10. The overload protection damper according to claim 9, characterized in that: There are multiple sliding members (3), a resistance plate (8) is installed between two adjacent sliding members (3), and the two ends of the sliding member (3) along the first direction are inclined in a direction close to the resistance plate (8).

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