Viscous damper

Abstract

The utility model provides a viscous damper. The viscous damper comprises a cylinder body, a piston rod and a first reset part, wherein the first reset part is connected with the piston rod; the fixed part and the piston rod are arranged at intervals; the reset assembly comprises a connecting part, a second reset part and a force application part, the connecting part is connected with the cylinder body and the fixing part, the second reset part is movably matched with the first reset part, and the force application part applies pressure to the first reset part and the second reset part in the direction perpendicular to the piston rod; the first reset part is arranged at the position of the piston rod and is assembled between the cylinder body and the fixing part through the reset assembly, so that the second reset part is movably matched with the first reset part, and pressure is applied to the first reset part and the second reset part through the combined action of the force application part; the first reset part and the second reset part return to the initial position, directional guide reset is achieved through the force application part, then the piston rod is fully reset, and the viscous damper eliminates residual deformation after vibration (vibration) of a vibration reduction (vibration) object.

Description

Technical Field

[0001] The present application relates to the technical field of dampers, and in particular to a viscous damper. Background Art

[0002] A viscous damper is a vibration (seismic) damper that uses the throttling resistance generated by the viscous fluid passing through a throttle valve as the source of damping force. It was initially used in the military field and was later widely used in building structures, bridge structures, and industrial fields.

[0003] The viscous damper is mainly composed of a piston, a cylinder, an end cover, a damping medium and a connector. The piston divides the cylinder into two parts. During the reciprocating motion of the piston in the cylinder, the damping medium flows rapidly in the two separated chambers. There is intense friction between the molecules of the medium and between the medium and the piston. When the medium passes through the piston hole, it generates a huge throttling damping. The combined force of these actions is called the damping force. The damping force generated during the flow converts the energy input by the external vibration (vibration) source into heat dissipation through the reciprocating motion of the piston in the viscous liquid, so that the piston movement speed gradually decreases, achieving the purpose of damping energy consumption.

[0004] However, when the external vibration source of the viscous damper disappears, the viscous damper cannot return to its initial state due to the residual deformation of the object being damped. How to restore the viscous damper to its initial state becomes an urgent problem to be solved. Utility Model Content

[0005] The purpose of the embodiment of the present application is to provide a viscous damper, which can restore the viscous damper to its initial state after vibration (vibration), thereby reducing the residual deformation of the object being vibrated (vibrated). In order to solve the above technical problems, the embodiment of the present application provides the following technical solutions:

[0006] The present application provides a viscous damper, comprising a cylinder body and a piston rod penetrating the cylinder body, and further comprising:

[0007] A first restoring portion, the first restoring portion being connected to the first end of the piston rod;

[0008] A fixing portion, spaced apart from the first end of the piston rod;

[0009] The reset assembly includes a connecting portion, a second reset portion and a force-applying portion, wherein the connecting portion is connected to the cylinder body and the fixing portion, the second reset portion is connected to the connecting portion and movably cooperates with the first reset portion, and the force-applying portion applies pressure to the first reset portion and the second reset portion in a direction perpendicular to the piston rod;

[0010] Among them, when the piston rod in the initial state is acted upon by an external force, the piston rod moves relative to the cylinder body along the length direction of the piston rod, and the first reset portion moves relative to the second reset portion along the length direction of the piston rod; when the piston rod in a non-initial state is freed from the external force applied to the piston rod, under the pressure of the force-applying portion, the first reset portion resets to a position cooperating with the second reset portion.

[0011] In some embodiments of the first aspect of the present application, the first reset portion is a protrusion or a groove, and the second reset portion is a groove or a protrusion corresponding to the first reset portion.

[0012] In some embodiments of the first aspect of the present application, the piston rod further comprises a reset end, the reset end is arranged at the first end of the piston rod, the reset end is respectively provided with two first reset portions in a direction perpendicular to the piston rod, and the two reset portions are arranged opposite to each other on the reset end;

[0013] The two connecting parts are arranged opposite to each other and clamp the reset end. A second reset part is arranged on one side of the connecting part close to the reset end. The force applying part runs through the two connecting parts and the clamped reset end so that the second reset part cooperates with the first reset part.

[0014] In some embodiments of the first aspect of the present application, the force-applying part includes a first guide member, which is vertically arranged along the length direction of the piston rod and passes through the two connecting parts and the reset end clamped in the middle; an elastic member, which is sleeved on the outer periphery of the first guide member and is placed on the side of the connecting part away from the second reset part; and an adjusting limit member, which is respectively placed on the first end and the second end of the first guide member.

[0015] In some embodiments of the first aspect of the present application, the reset end is provided with a slot hole arranged along the length direction of the piston rod, and the slot hole penetrates the first reset portion in a direction perpendicular to the piston rod;

[0016] The connecting portion is provided with a circular through hole, the circular through hole passes through the second resetting portion in a direction perpendicular to the piston rod and is communicated with the slotted hole;

[0017] The first guide member passes through the circular through hole and the slotted hole, and further passes through the first restoring portion and the second restoring portion.

[0018] In some embodiments of the first aspect of the present application, the reset assembly also includes a second guide member, which is respectively arranged at both ends of the connecting part, and the connecting part is respectively connected to the cylinder body and the fixed part by the second guide member, and the connecting part can be displaced relative to the cylinder body and the fixed part in a direction perpendicular to the piston rod through the second guide member.

[0019] In some embodiments of the first aspect of the present application, the elastic member is a disc spring group.

[0020] In some embodiments of the first aspect of the present application, the cross-section of the raised portion gradually decreases from the bottom end to the top end, and at least two opposite side surfaces are in contact with the groove portion.

[0021] In some embodiments of the first aspect of the present application, the cross section of the protrusion is a trapezoid, the groove is arranged corresponding to the protrusion, and the cross section of the groove is an inverted trapezoid, and is arranged corresponding to the protrusion with a trapezoidal cross section. In some embodiments of the first aspect of the present application, the second end of the piston rod is a first connecting end, and a second connecting end is provided on a side of the fixed end away from the first end of the piston rod.

[0022] Compared with the prior art, the viscous damper provided in the present application is provided with a first reset portion at the first end position of the piston rod, and is assembled between the cylinder body and the fixed portion through a reset assembly, so that the second reset portion can be flexibly coordinated with the first reset portion, and the force-applying portion is used to act on the first reset portion and the second reset portion together to apply pressure perpendicular to the length direction of the piston rod, so that when the external force is eliminated, the first reset portion and the second reset portion return to the coordinated position, and the directional guided reset is achieved through the force-applying portion, so that the viscous damper can be restored to its initial state after the vibration (vibration) source disappears, thereby reducing the residual deformation of the object being damped (vibrated). BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easy to understand. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0024] Figure 1 The overall structural diagram of the viscous damper of the present application is schematically shown;

[0025] Figure 2 The overall structure of the viscous damper of the present application is schematically shown in a top view;

[0026] Figure 3 A side view of a piston rod of a viscous damper of the present application is schematically shown;

[0027] Figure 4 A top view of the piston rod of the viscous damper of the present application is schematically shown;

[0028] Figure 5 The cross-sectional view of the connection portion of the viscous damper of the present application is schematically shown;

[0029] Figure 6The schematic diagram of the piston rod tension of the viscous damper of the present application is shown schematically.

[0030] Description of Figure Numbers:

[0031] 1. Cylinder body, 11. Seal, 12. Damping medium;

[0032] 2. piston rod, 21. first reset portion, 22. reset end, 221. slot, 23. piston;

[0033] 3. Fixed part;

[0034] 4. Reset assembly, 41. Connecting part, 411. Circular through hole, 42. Second reset part, 43. Force applying part, 431. First guide member, 432. Elastic member, 433. Adjusting limit member; 44. Second guide member;

[0035] 5. A first connection end;

[0036] 6. Second connection terminal. DETAILED DESCRIPTION

[0037] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0038] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs.

[0039] Viscous dampers are devices that provide resistance to movement and dissipate kinetic energy. They are now widely used in structural engineering such as buildings, bridges, and railways.

[0040] Its structure includes a cylinder body, a seal, a damping medium, a piston and a piston rod. The damping medium is filled in the cylinder body. The cylinder body seals the damping medium in the cylinder body through seals arranged at both ends. The piston rod passes through the cylinder body seal and is arranged in the cylinder body. One end of the piston rod is a first connecting end, and the first connecting end is connected to an external input vibration (vibration) source on one side. The piston is fixedly arranged in the middle section of the piston rod and divides the inner part of the cylinder body into two chambers. A throttling hole is arranged on the piston.

[0041] When an external vibration (vibration) source acts, the piston rod drives the piston to reciprocate in the cylinder body, and the damping medium flows rapidly in the two chambers. The molecules of the damping medium and the damping medium and the piston produce intense friction. The damping medium produces huge throttling damping when passing through the throttle hole on the piston. The combined force of these actions is called the damping force. The damping force generated in the flow converts the energy input by the external vibration (vibration) source into heat dissipation through the reciprocating motion of the piston in the damping medium, so that the piston movement speed gradually decreases, achieving the purpose of damping energy consumption.

[0042] When the external vibration source stops working, the piston will not return to the middle position of the cylinder body immediately. At this time, the piston rod is not fully reset. To avoid this situation, the piston rod is made to pass through the cylinder body, and a first reset part is provided at the other end of the piston rod. The first reset part is movably cooperated with the reset assembly, so that the piston rod can be quickly reset after the vibration ends.

[0043] Among them, the reset component includes a connecting part, a second reset part, and a force-applying part. The first reset part and the second reset part of the piston rod are movably matched. In the initial state, the first reset part and the second reset part are in fit and contact, and the force-applying part applies pressure perpendicular to the piston rod to the first reset part and the second reset part. When vibration (vibration) occurs, the first reset part moves relative to the second reset part along the length direction of the piston rod until the vibration (vibration) ends. At this time, there is no external force interference. Under the action of the force-applying part, the first reset part and the second reset part re-fit and return to the initial position, thereby enabling the viscous damper to restore its initial state and reduce the residual deformation of the object being damped (vibrated).

[0044] like Figure 1 , 2 As shown in , 6 , a viscous damper includes a cylinder body 1 and a piston rod 2 penetrating the cylinder body 1 , and also includes a first reset portion 21 , a fixing portion 3 and a reset assembly 4 .

[0045] The first restoring portion 21 is connected to the first end of the piston rod 2;

[0046] The fixing portion 3 is spaced apart from the first end of the piston rod 2;

[0047] The reset assembly 4 includes a connecting portion 41, a second reset portion 42 and a force-applying portion 43, the connecting portion 41 is connected to the cylinder body 1 and the fixing portion 3, the second reset portion 42 is connected to the connecting portion 41 and movably cooperates with the first reset portion 21, and the force-applying portion 43 applies pressure to the first reset portion 21 and the second reset portion 42 in a direction perpendicular to the piston rod 2; wherein, when the piston rod 2 in the initial state is subjected to an external force, the piston rod moves relative to the cylinder body along the length direction of the piston rod 2, and the first reset portion 21 moves relative to the second reset portion 42 along the length direction of the piston rod 2; when the piston rod 2 in the non-initial state removes the external force applied to the piston rod, under the pressure of the force-applying portion 43, the first reset portion 21 is reset to a position cooperating with the second reset portion 42.

[0048] Specifically, the first reset portion 21 is arranged at the first end of the piston rod 2, and the first reset portion 21 and the second reset portion 42 are matched in structure and can move relatively. The matching structure of the first reset portion 21 and the second reset portion 42 can be a convex portion with a trapezoidal cross section matched with a concave portion with an inverted trapezoidal cross section, or a convex portion with a semicircular cross section matched with a concave portion with a semicircular cross section. As long as the inclined surfaces on the same side of the first reset portion 21 and the second reset portion 42 can fit in contact and the overall thickness of the first reset portion 21 and the second reset portion 42 can be changed when the two are relatively displaced.

[0049] The fixing part 3 can be rectangular or cylindrical, and is spaced apart from the piston rod 2, leaving space for the lateral movement of the piston rod 2, and the lateral movement space of the piston rod 2 is not less than the limit displacement stroke designed by the viscous damper. A second connecting end 6 is provided on the side of the fixing end away from the first end of the piston rod 2, and the second connecting end 6 is used to connect to the external input vibration (vibration) source on the other side.

[0050] The connecting portion 41 , including but not limited to a plate, may also be a cylinder or a column, and is used to connect the cylinder body 1 and the fixing portion 3 .

[0051] The force-applying portion 43 continuously applies a vertical pressure perpendicular to the piston rod 2 to the first reset portion 21 and the second reset portion 42 , ensuring that the first reset portion 21 and the second reset portion 42 have a tendency to return to the initial position without the action of external force.

[0052] In the initial state, the piston 23 is located in the middle section of the cylinder body 1, and the cylinder body 1 is evenly divided into two chambers. At this time, the first reset portion 21 and the second reset portion 42 are in the initial matching state, and the two opposite side walls of the first reset portion 21 and the second reset portion 42 are in close contact. At this time, the force-applying portion 43 has two states, namely, a pre-tightened state and a non-pre-tightened state. When pre-tightened, the force-applying portion 43 applies excessive vertical pressure, so that the two opposite side walls of the first reset portion 21 and the second reset portion 42 are in close contact.

[0053] When the external vibration (vibration) source starts to act, the two ends of the viscous damper are stimulated by the external vibration (vibration) source, so that the piston rod 2 moves relative to the reset assembly 4, and then the first reset portion 21 moves relative to the second reset portion 42 along the length direction of the piston rod 2. At this time, the second reset portion 42, which was originally in contact with both side walls of the first reset portion 21, is detached from the first reset portion 21, and along with the movement of the first reset portion 21, the second reset portion 42 only contacts the inclined surface on one side of the first reset portion 21 and moves in the direction of the inclined surface. At this time, the force applying portion 43 is squeezed and is in a force storage state.

[0054] When the external force disappears, the force-applying portion 43 releases the pressure and applies vertical pressure to the first reset portion 21 and the second reset portion 42 , so that the first reset portion 21 and the second reset portion 42 return to the initial matching state, thereby fully resetting the piston rod 2 .

[0055] By setting the first reset portion 21 at the first end position of the piston rod 2, and assembling the reset assembly 4 between the cylinder body 1 and the fixing portion 3, the second reset is movably matched with the first reset portion 21, and the force-applying portion 43 is used to act on the first reset portion 21 and the second reset portion 42 to apply pressure perpendicular to the length direction of the piston rod 2, so that when the external force is eliminated, the first reset portion 21 and the second reset portion 42 return to the matching position, and the directional guided reset is achieved through the force-applying portion 43, so that the piston rod 2 is fully reset, so that the viscous damper is restored to its initial state.

[0056] like Figure 1 , 3 As shown in , 5 , the first reset portion 21 is a convex portion or a concave portion, and the second reset portion 42 is a concave portion or a convex portion corresponding to the first reset portion 21 .

[0057] Specifically, in one case, the first reset portion 21 is a protruding portion, and the corresponding second reset portion 42 is a groove portion; in another case, the first reset portion 21 is a groove portion, and the corresponding second reset portion 42 is a protruding portion.

[0058] Wherein, in the initial state of the viscous damper, the protrusion and the groove can perfectly match, and the protrusion has at least two inclined surfaces arranged opposite to each other, and the groove has at least two opposite inclined surfaces, and the inclined surface of the protrusion is in smooth contact with the clear surface of the groove, so that the protrusion and the groove can slide along the inclined surface on either side. The protrusion and the groove fit tightly, and lubrication measures are adopted, including but not limited to: polytetrafluoroethylene coating, internal polytetrafluoroethylene plate, and molybdenum disulfide grease applied to the contact surface.

[0059] like Figure 1 , 3As shown in , 4, and 6, the piston rod 2 further includes a reset end 22, which is disposed at the first end of the piston rod 2. The reset end 22 is provided with two first reset portions 21 along a direction perpendicular to the piston rod 2, and the two reset portions are disposed opposite to each other on the reset end 22;

[0060] The two connecting parts 41 are arranged opposite to each other and clamp the reset end 22. A second reset part 42 is provided on one side of the connecting part 41 close to the reset end 22. The force applying part 43 passes through the two connecting parts 41 and the clamped reset end 22, so that the second reset part 42 cooperates with the first reset part 21.

[0061] Specifically, the reset end 22 can be integrally provided with the piston rod 2, or can be detachably connected by means of internal and external thread structures or inlaying or snap-fitting. The cross-section of the reset end 22 can be circular, rectangular or other shapes. Selecting a rectangular cross-section can reduce the overall volume of the device, and the processing technology is relatively simple when the first reset portion 21 is opened on the opposite side walls.

[0062] The first reset portion 21 is a groove portion, and the two first reset portions 21 are respectively opened on the longer side edges of the reset end 22 with a rectangular cross section. The two first reset portions 21 are arranged opposite to each other, and the center line passes through and is perpendicular to the extended axis line of the piston rod 2 .

[0063] The connecting portion 41 is made of a strip-shaped plate material, which can reduce the overall volume of the device. A second reset portion 42 is provided on the side of the connecting portion 41 close to the reset end 22. The second reset portion 42 is a convex portion, which is movably matched with the first reset portion 21. When there is no vibration (vibration) external force, the first reset portion 21 and the second reset portion 42 fit together; the force-applying portion 43 applies pressure to the two connecting portions 41 that clamp the reset end 22, so that the connecting portion 41 clamps the reset end 22.

[0064] like Figure 1 , 6 As shown, the force applying part 43 includes a first guide member 431, which is vertically arranged along the length direction of the piston rod 2 and passes through the two connecting parts 41 and the reset end 22 clamped in the middle;

[0065] The elastic member 432 is sleeved on the outer periphery of the first guide member 431 and is placed on the side of the connecting portion 41 away from the second restoring portion 42.

[0066] The adjustment limiter 433 is respectively disposed at the first end and the second end of the first guide member 431 .

[0067] Specifically, the first guide member 431 can be a full-thread screw or a rod with threads at both ends; there is at least one first guide member 431, which penetrates the middle of the two connecting parts 41 and the reset end 22, and penetrates the first reset part 21 and the second reset part 42 at the same time; when there are multiple first guide members 431, they penetrate the two connecting parts 41 and the reset end 22 at the same time, so that the connecting part 41 can move along the length direction of the guide rod.

[0068] The elastic member 432 can be a compression spring, a disc spring, a disc spring group or a rubber block. The disc spring group is selected, and by adjusting the overlapping and matching method of the disc spring group, the stroke and elastic stiffness of the disc spring group can be freely adjusted according to the geometric structure of the reset part, so that the disc spring group has the characteristics of high elasticity, high stiffness, durability, and concentrated direction of elastic force when restoring deformation, which is beneficial to the reset coordination of the first reset part 21 and the second reset part 42.

[0069] The adjustment limit member 433 can be a bolt, an adjustment nut, or a hand-tightened nut, which is installed on the first guide member 431 through an internal thread structure, and the pressure state of the elastic member 432 is adjusted by screwing, while limiting the elastic member 432 and the connecting portion 41.

[0070] like Figure 2-4 As shown, the reset end 22 is provided with a slot 221 arranged along the length direction of the piston rod 2, and the slot 221 penetrates the first reset portion 21 in a direction perpendicular to the piston rod 2; the connecting portion 41 is provided with a circular through hole 411, and the circular through hole 411 penetrates the second reset portion 42 in a direction perpendicular to the piston rod 2 and is connected with the slot 221; the first guide member 431 penetrates the circular through hole 411 and the slot 221, and then penetrates the first reset portion 21 and the second reset portion 42.

[0071] Specifically, the slot hole 221 formed at the reset end 22 provides a moving space for the reset end 22 to move relative to the first guide member 431 along with the piston rod 2 .

[0072] like Figure 1 , 2 As shown in Figures 6 and 7, the reset assembly 4 also includes a second guide member 44, which is respectively arranged at both ends of the connecting portion 41. The connecting portion 41 is respectively connected to the cylinder body 1 and the fixing portion 3 by means of the second guide member 44, and the connecting portion 41 can be displaced relative to the cylinder body 1 and the fixing portion 3 along a direction perpendicular to the piston rod through the second guide member 44.

[0073] Specifically, the second guide member 44 is a bolt, a guide shaft with a thread, or a guide column, and the length of the second guide member 44 is shorter than that of the first guide member 431, but the length of the second guide member 44 is longer than the common thickness of the side wall of the cylinder body 1 and the side wall of the connecting portion 41, and the common thickness of the side wall of the fixing portion 3 and the side wall of the connecting portion 41. Space is provided for the connecting portion 41 to move along the length direction of the first guide member 431, so that within the preset range of change of the thickness of the reset portion, the connecting portion 41 can move freely along the direction of the guide member 431.

[0074] like Figure 1 As shown, the elastic member 432 is a disc spring assembly.

[0075] Specifically, the disc spring group can be overlapped, matched or mixed as needed.

[0076] like Figure 1 , 5 As shown in 6, the cross section of the raised portion gradually decreases from the bottom end to the top end, and at least two opposite side surfaces are in contact with the groove portion.

[0077] like Figure 1 , 5 As shown in Figures 6 and 7, the cross section of the raised portion is a trapezoid.

[0078] like Figure 1 , 2 As shown in , 6 , the second end of the piston rod 2 is a first connecting end 5 , and a second connecting end 6 is provided on the side of the fixed end away from the first end of the piston rod 2 .

[0079] Specifically, the first connection end 5 and the second connection end 6 are both in the form of ear plates, which can be connected to the connection components provided for the installation of the damper in the building or bridge by means of a pin connection. Figure 6 As shown, at this time, the viscous damper is acted upon by an external vibration source, the piston rod 2 moves away from the fixed portion 3, and the first reset portion 21 follows the piston rod 2 to move away from the fixed portion 3. At this time, the second reset portion 42 is lifted by the reset end 22 and moves along the length direction of the first guide 431, and the disc spring assembly is compressed and deformed by the connecting portion 41. After the vibration source ends and the external force is eliminated, the disc spring rebounds and resets, so that the second reset portion 42 moves along the first guide 431 and approaches the reset end 22, and the first reset portion 21 is closely matched with the second reset portion 42 again along the inclined surface, so that the piston rod 2 is fully reset.

[0080] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A viscous damper, comprising a cylinder and a piston rod passing through the cylinder, It is characterized in that Also includes: a first restoring portion connected to the first end of the piston rod; A fixing portion, spaced apart from the first end of the piston rod; A reset assembly, the reset assembly comprising a connecting portion, a second reset portion and a force applying portion, the connecting portion being connected to the cylinder body and the fixing portion, the second reset portion being connected to the connecting portion and movably cooperating with the first reset portion, and the force applying portion applying pressure to the first reset portion and the second reset portion in a direction perpendicular to the piston rod; Among them, when the piston rod in the initial state is acted upon by an external force, the piston rod moves relative to the cylinder body along the length direction of the piston rod, and the first reset portion moves relative to the second reset portion along the length direction of the piston rod; when the piston rod in a non-initial state is freed from the external force applied to the piston rod, under the pressure of the force-applying portion, the first reset portion resets to a position cooperating with the second reset portion.

2. The viscous damper according to claim 1, Features: The first restoring portion is a convex portion or a concave portion, and the second restoring portion is a concave portion or a convex portion corresponding to the first restoring portion.

3. The viscous damper according to claim 2, Features: The piston rod further comprises a reset end, which is arranged at the first end of the piston rod, and the reset end is respectively provided with two first reset parts in a direction perpendicular to the piston rod, and the two reset parts are arranged opposite to each other on the reset end; The two connecting parts are arranged opposite to each other and clamp the reset end. The second reset part is provided on one side of the connecting part close to the reset end. The force applying part passes through the two connecting parts and the clamped reset end, so that the second reset part cooperates with the first reset part.

4. The viscous damper according to claim 3, Features: The force applying part includes: A first guide member is vertically arranged along the length direction of the piston rod and passes through the two connecting parts and the reset end clamped in the middle; an elastic member, sleeved on the outer periphery of the first guide member and disposed on a side of the connecting portion away from the second resetting portion; The adjusting limit members are respectively disposed at the first end and the second end of the first guide member.

5. The viscous damper according to claim 4, Features: The reset end is provided with a slot hole arranged along the length direction of the piston rod, and the slot hole penetrates the first reset portion in a direction perpendicular to the piston rod; The connecting portion is provided with a circular through hole, the circular through hole passes through the second resetting portion in a direction perpendicular to the piston rod and is communicated with the slotted hole; The first guide member passes through the circular through hole and the slotted hole, and further passes through the first restoring portion and the second restoring portion.

6. The viscous damper according to claim 5, Features: The reset assembly also includes a second guide member, which is respectively arranged at both ends of the connecting part. The connecting part is connected to the cylinder body and the fixed part respectively by the second guide member, and the connecting part can be displaced relative to the cylinder body and the fixed part in a direction perpendicular to the piston rod through the second guide member.

7. The viscous damper according to claim 5 or 6, Features: The elastic member is a disc spring group.

8. The viscous damper according to claim 2 or 3, Features: The cross section of the protrusion gradually decreases from the bottom end to the top end, and at least two opposite side surfaces are in close contact with the groove portion.

9. The viscous damper according to claim 8, Features: The cross section of the protrusion is a trapezoid, the groove is arranged corresponding to the protrusion, and the cross section of the groove is an inverted trapezoid, which is arranged corresponding to the protrusion with a trapezoidal cross section.

10. The viscous damper according to any one of claims 1 to 3, Features: The second end of the piston rod is a first connecting end, and a second connecting end is provided on a side of the fixing portion away from the first end of the piston rod.

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