CN221683465U - Single-rod viscous damper and vibration reduction device - Google Patents

Abstract

The application relates to a single-rod viscous damper and a vibration damper, wherein the single-rod viscous damper comprises a cylinder barrel and a piston rod, a piston is arranged in the cylinder barrel, and an air bag is arranged in the piston; one end of the piston rod stretches into the cylinder barrel and is connected with the piston, the other end of the piston rod stretches out of the cylinder barrel, an air inflation hole is formed in the piston rod and communicated with the air bag, and the air bag is arranged at one end far away from the piston rod. Through installing the gasbag at the piston to set up the gas filling hole with the gasbag intercommunication in the piston rod, can be through gas filling hole to aerify in the gasbag, guarantee that the gasbag is moderate in pressure when using, when the relative motion takes place for piston and cylinder, the volume of gasbag can be compressed and shrink or expand, and the gasbag is as volume compensation arrangement, realizes the dynamic balance of piston both sides damping medium volume, has solved the easy asymmetric problem that causes the piston card of attenuator of piston both sides damping medium in the single-rod viscous damper among the related art.

Description

Single-rod viscous damper and vibration reduction device

Technical Field

The present application relates to the field of vibration reduction of engineering structures, and in particular to a single-rod viscous damper and a vibration reduction device.

Background Art

At present, cable vibration is a kind of vibration that occurs when the cable is subjected to the combined effects of wind and rain. Cable vibration may produce a large amplitude and endanger the safety of the structure, so it is necessary to effectively control the cable vibration. Installing a viscous damper is a common vibration reduction measure. The viscous damper is generally composed of a cylinder, a piston, a piston rod, a damping medium, a sealing component and a connecting component. The damper output is related to the vibration speed. During the operation of the viscous damper, it only provides damping force to the structure without providing additional stiffness. The viscous damper can absorb the energy input into the structure well and effectively protect the safety of the structure. Therefore, the viscous damper has been widely used.

In the related technology, traditional viscous dampers mostly adopt a double-rod structure. The center distance of the pin hole of the double-rod damper is longer than that of the single-rod damper. Under the condition of the same stroke, the difference between the two is approximately equal to twice the stroke. In specific projects where the damper design stroke is large and the installation space is limited, the double-rod viscous damper cannot be used. However, during the use of the current single-rod damper, the piston follows the piston rod on one side to move to one side of the damper. During the movement of the piston, the damping medium on both sides of the piston is easily asymmetric, which can easily cause the damper piston to get stuck.

Therefore, it is necessary to design a new single-rod viscous damper to overcome the above problems.

Utility Model Content

The present application provides a single-rod viscous damper, which can solve the technical problem in the related art that the piston of the single-rod viscous damper is easily stuck due to the asymmetry of the damping medium on both sides of the piston.

In a first aspect, an embodiment of the present application provides a single-rod viscous damper, comprising: a cylinder, in which a piston is provided, and an airbag is installed on the piston; a piston rod, in which one end of the piston rod extends into the cylinder and is connected to the piston, and the other end extends out of the cylinder, an inflation hole is provided in the piston rod, the inflation hole is connected to the airbag, and the airbag is provided at an end away from the piston rod.

In which, one side of the piston in the cylinder is connected to the piston rod, so that a rodless chamber and a rod chamber are formed in the cylinder, the piston is provided with a flow hole, the end of the piston rod away from the airbag is provided with a first ear plate, the end of the cylinder away from the piston rod is provided with a second ear plate, the second ear plate is threadedly connected to the cylinder, the second ear plate is provided with an oil filling port, the end of the cylinder close to the piston rod is threadedly connected to the end cover, the end cover is provided with an oil outlet, and joint bearings are installed in the bearing holes of the first ear plate and the second ear plate. When the first ear plate and the second ear plate move relative to each other, the first ear plate drives the piston rod to move, so that the piston moves in the cylinder. When the piston moves to the left relative to the cylinder, the damping medium in the rodless chamber enters the rod chamber through the flow hole, and the excess damping medium in the rodless chamber flows into the piston, and the airbag is less compressed; when the piston moves to the right relative to the cylinder, the damping medium in the rod chamber enters the rodless chamber through the flow hole, the volumes of the rodless chamber and the rod chamber are asymmetric, and the pressure in the rodless chamber decreases. At this time, the gas in the airbag expands the volume of the airbag, causing the damping medium in the piston to squeeze into the rodless chamber, and the single-rod viscous damper converts the vibration energy into heat energy of the damping medium in the damper through the flow hole and dissipates it, thereby achieving the effect of vibration reduction and energy consumption.

In combination with the first aspect, in one embodiment, a cavity is provided in the piston, and the airbag is installed in the cavity. The airbag is installed in the cavity of the piston, so that the airbag changes with the position of the piston, effectively saving the space occupied by the airbag while protecting the airbag from damage. In addition, the airbag is provided in the piston that isolates the rodless cavity and the rod cavity, so that the dynamic balance of the damping medium volume on both sides of the piston can be achieved.

In combination with the first aspect, in one embodiment, the piston is provided with a guide hole, and the piston rod passes through the guide hole to connect with the airbag, so that the inflation hole is connected with the airbag. The guide hole provided on the piston ensures that the piston rod is connected with the piston, and the airbag is connected with the inflation hole in the piston rod. The piston rod is further connected with the airbag by the piston to enhance the connection strength, and the rod cavity is isolated to ensure the airtightness of the rodless cavity. The piston rod can be threadedly connected with the piston through the guide hole.

In combination with the first aspect, in one embodiment, a connecting portion is provided at the end of the piston rod, and the connecting portion extends into the airbag so that the airbag wraps the connecting portion, and the inflation hole passes through the connecting portion. The connecting portion protrudes out of the guide hole, and the diameter of the connecting portion is larger than the diameter of the piston rod. By extending the connecting portion into the airbag to effectively connect with the airbag and seal the outlet of the airbag, it is ensured that the airbag can adjust the pressure through the inflation hole.

In combination with the first aspect, in one embodiment, a pad is provided at the corner of the cavity, the pad having an arc-shaped contact surface, and the arc-shaped contact surface contacts the airbag. The two surfaces of the pad in contact with the cavity are arranged at right angles, the pad can balance the pressure of the airbag, and the airbag will not be damaged due to repeated squeezing when the single-rod viscous damper operates at high speed.

In combination with the first aspect, in one embodiment, the contact surface between the connecting portion and the airbag is set to be arc-shaped. Wherein, the contact surface between the connecting portion and the airbag 3 is set to be arc-shaped, which can cooperate with the arc-shaped contact surface of the cushion block, and the arc-shaped surface of the airbag is clamped between the connecting portion and the arc-shaped contact surface of the cushion block, so that the airbag will not be damaged due to severe internal deformation without support when the single-rod viscous damper operates at high speed.

In combination with the first aspect, in one embodiment, the inflation hole penetrates from one end of the piston rod to the other end of the piston rod along the axial direction of the piston rod. The inflation hole penetrates along the axial direction of the piston rod to ensure that when the airbag needs to be inflated with nitrogen, the airbag is directly connected to the nitrogen pump through the inflation hole in the piston rod.

In combination with the first aspect, in one embodiment, the end of the piston rod away from the airbag is threadedly connected to a first ear plate, so that the first ear plate blocks the inflation hole. The first ear plate is threadedly connected to the piston rod, and under normal circumstances, the first ear plate blocks the inflation hole. When the airbag needs to be inflated with nitrogen, the first ear plate can be unscrewed to expose the end of the piston rod.

In combination with the first aspect, in one embodiment, an inflation screw plug is provided at one end of the inflation hole away from the airbag. The inflation screw plug is generally in a closed state. When the airbag needs to be inflated with nitrogen, the first ear plate is unscrewed, and then the joint is slowly screwed in. The joint contains a thimble, and the thimble opens the inflation screw plug. The inflation screw plug is connected to a nitrogen pump through a hose, and nitrogen of appropriate pressure is input to the airbag through the inflation hole. The closing and opening of the inflation screw plug can effectively adjust the pressure of the airbag.

In the second aspect, the embodiment of the present application provides a vibration reduction device, a cable clamp and the single-rod viscous damper installed on the cable clamp. The locking clamp includes a first cable clamp and a second cable clamp, the first cable clamp and the second cable clamp are semicircular clamps, the first cable clamp and the second cable clamp clamp the inclined cable through bolts, the first cable clamp and the inclined cable, and the second cable clamp and the inclined cable are provided with rubber pads, the rubber pads fill the gaps between the first cable clamp and the inclined cable, and the second cable clamp and the inclined cable, the second cable clamp is connected to the single-rod viscous damper through a pin shaft, the other end of the single-rod viscous damper is connected to the earring seat through the pin shaft, the two single-rod viscous dampers can be symmetrically arranged along the central axis at an angle of 60°, and the vibration reduction device includes two single-rod viscous dampers. Among them, the single-rod viscous damper has the advantages of saving space, full hysteresis curve, good energy consumption performance and stable material properties; designers can freely adjust the diameter of the flow hole according to the characteristics of the inclined cable to adjust the damping coefficient of the single-rod viscous damper; since the single-rod viscous damper has a simple structure and greatly shortened size, the vibration reduction device assembled from two single-rod viscous dampers can meet specific tasks with limited space.

Specifically, the assembly method of the single-rod viscous damper provided by the present application may include the following steps:

S1: Push the piston rod to push the piston to the leftmost end, so that the piston fits with the second ear plate.

S2: Open the oil filling port and connect an external oil pump.

S3: During the oil filling process, the piston slides to the rightmost end, and the oil filling is completed when the oil outlet continuously discharges oil.

S4: Unscrew the first ear plate, use the ejector pin of the joint to push open the inflation screw plug, the inflation screw plug is connected to the nitrogen pump through a hose, and when the airbag is completely inflated with nitrogen, the inflation screw plug is closed and the first ear plate is screwed in.

S5: Push the piston rod to push the piston to the middle position of the cylinder, closing the oil filling port and the oil outlet.

The beneficial effects brought by the technical solution provided by the embodiments of the present application include:

By installing an airbag on the piston and providing an inflation hole connected to the airbag in the piston rod, air can be inflated through the inflation hole to ensure that the pressure of the airbag is moderate when in use. When the piston and the cylinder barrel move relative to each other, the volume of the airbag can be compressed or expanded. The airbag acts as a volume compensation device to achieve dynamic balance of the volume of the damping medium on both sides of the piston, solving the problem of the damping medium on both sides of the piston in the single-rod viscous damper in the related technology being easily asymmetric, causing the piston of the damper to get stuck.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a schematic structural diagram of a single-rod viscous damper provided in an embodiment of the present application;

FIG2 is a front view of a vibration reduction device provided in an embodiment of the present application;

FIG. 3 is a side view of a vibration reduction device provided in an embodiment of the present application.

In the figure: 1. cylinder barrel; 11. rodless chamber; 12. rod chamber; 2. piston; 21. cavity; 22. pad; 23. flow hole; 3. air bag; 4. piston rod; 41. inflation hole; 42. connecting part; 43. inflation screw plug; 5. first ear plate; 6. second ear plate; 61. oil filling port; 7. end cover; 71. oil outlet; 8. spherical bearing; 101. first cable clamp; 102. second cable clamp; 103. inclined cable; 104. bolt; 105. rubber pad; 106. single-rod viscous damper; 107. pin; 108. earring seat.

DETAILED DESCRIPTION

In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

The embodiments of the present application provide a single-rod viscous damper and a vibration reduction device, which can solve the technical problem in the related art that the piston of the single-rod viscous damper is easily stuck due to the asymmetry of the damping medium on both sides of the piston.

As shown in Figure 1, an embodiment of the present application provides a single-rod viscous damper, which includes: a cylinder 1, a piston 2 is provided in the cylinder 1, and the piston 2 is equipped with an airbag 3; a piston rod 4, one end of the piston rod 4 extends into the cylinder 1 and is connected to the piston 2, and the other end extends out of the cylinder 1, and an inflation hole 41 is provided in the piston rod 4, and the inflation hole 41 is connected to the airbag 3, and the airbag 3 is arranged at one end away from the piston rod 4.

In this embodiment, one side of the piston 2 in the cylinder 1 is connected to the piston rod 4, so that a rodless chamber 11 and a rod chamber 12 are formed in the cylinder 1, the piston 2 is provided with a flow hole 23, and the end of the piston rod 4 away from the airbag 3 is provided with a first ear plate 5, and the end of the cylinder 1 away from the piston rod 4 is provided with a second ear plate 6, the second ear plate 6 is threadedly connected to the cylinder 1, and the second ear plate 6 is provided with an oil filling port 61, and the end of the cylinder 1 close to the piston rod 4 is threadedly connected to the end cover 7, and the end cover 7 is provided with an oil outlet 71, and joint bearings 8 are installed in the bearing holes of the first ear plate 5 and the second ear plate 6. When the first ear plate 5 and the second ear plate 6 move relative to each other, the first ear plate 5 drives the piston rod 4 to move, so that the piston 2 moves in the cylinder 1.

Among them, by installing the airbag 3 on the piston 2 and providing an inflation hole 41 in communication with the airbag 3 in the piston rod 4, air can be inflated into the airbag 3 through the inflation hole 41 to ensure that the pressure of the airbag 3 is moderate when in use. When the piston 2 moves to the left relative to the cylinder 1, the damping medium in the rodless chamber 11 enters the rod chamber 12 through the flow hole 23, and the excess damping medium in the rodless chamber 11 flows into the piston 2, and the airbag 3 is less compressed. When the piston 2 moves to the right relative to the cylinder 1, the The damping medium in the rod chamber 12 will enter the rodless chamber 11 through the flow hole 23. The volumes of the rodless chamber 11 and the rod chamber 12 are asymmetric, and the pressure of the rodless chamber 11 is reduced. At this time, the gas in the airbag 3 expands the volume of the airbag 3, causing the damping medium in the piston 2 to squeeze into the rodless chamber 11. The airbag 3 acts as a volume compensation device to achieve dynamic balance of the damping medium volume on both sides of the piston 2, solving the problem in the related art that the damping medium on both sides of the piston 2 in the single-rod viscous damper is easily asymmetric, causing the piston 2 of the damper to get stuck. The single-rod viscous damper 106 converts the vibration energy into heat energy of the damping medium in the damper through the flow hole 23, thereby achieving the effect of vibration reduction and energy consumption.

Further, referring to FIG. 1 , in some embodiments, a cavity 21 is provided in the piston 2, and the airbag 3 is installed in the cavity 21. In this embodiment, the airbag 3 is installed in the cavity 21 of the piston 2, so that the airbag 3 changes with the position of the piston 2, effectively saving the space occupied by the airbag 3 while protecting the airbag 3 from damage. In addition, the airbag 3 is provided in the piston that isolates the rodless cavity 11 and the rod cavity 12, so that the dynamic balance of the damping medium volume on both sides of the piston 2 can be achieved.

Further, referring to FIG. 1 , in some embodiments, the piston 2 is provided with a guide hole, and the piston rod 4 passes through the guide hole to connect with the airbag 3, so that the inflation hole 41 is in communication with the airbag 3. In this embodiment, the piston 2 is provided with the guide hole to ensure that the piston rod 4 is connected with the piston 2, while the airbag 3 is in communication with the inflation hole 41 in the piston rod 4. The piston rod 4 is further connected with the airbag 3 by the piston 2 to enhance the connection strength, and the rod cavity 12 is also isolated to ensure the airtightness of the rodless cavity 11. Among them, the piston rod 4 can be threadedly connected with the piston 2 through the guide hole.

Further, referring to FIG. 1 , in some embodiments, the end of the piston rod 4 is provided with a connecting portion 42, and the connecting portion 42 extends into the airbag 3, so that the airbag 3 wraps the connecting portion 42, and the inflation hole 41 passes through the connecting portion 42. In this embodiment, the connecting portion 42 protrudes out of the guide hole, and the diameter of the connecting portion 42 is larger than the diameter of the piston rod 4. By extending the connecting portion 42 into the airbag 3 to effectively connect with the airbag 3 and seal the outlet of the airbag 3, it is ensured that the pressure of the airbag 3 can be adjusted through the inflation hole 41.

Further, referring to FIG. 1 , in some embodiments, a cushion block 22 is provided at the corner of the cavity 21, and the cushion block 22 has an arc-shaped contact surface, and the arc-shaped contact surface contacts the airbag 3. In this embodiment, the two surfaces of the cushion block 22 contacting the cavity 21 are set at right angles, and the cushion block 22 can balance the pressure of the airbag 3, so that the airbag 3 will not be damaged due to repeated squeezing when the single-rod viscous damper 106 operates at high speed.

Further, referring to FIG. 1 , in some embodiments, the contact surface between the connecting portion 42 and the airbag 3 is set to be arc-shaped. In this embodiment, the contact surface between the connecting portion 42 and the airbag 3 is set to be arc-shaped, which can cooperate with the arc-shaped contact surface of the cushion block 22, and the arc-shaped surface of the airbag 3 is clamped between the connecting portion 42 and the arc-shaped contact surface of the cushion block 22, so that the airbag 3 will not be damaged due to severe internal deformation without support when the single-rod viscous damper 106 operates at high speed.

Further, referring to FIG. 1 , in some embodiments, the inflation hole 41 penetrates from one end of the piston rod 4 to the other end of the piston rod 4 along the axial direction of the piston rod 4. The inflation hole 41 penetrates along the axial direction of the piston rod 4 to ensure that the airbag 3 is directly connected to the nitrogen pump through the inflation hole 41 in the piston rod 4 when the airbag 3 needs to be inflated with nitrogen.

Further, referring to FIG. 1 , in some embodiments, the end of the piston rod 4 away from the airbag 3 is threadedly connected with a first ear plate 5, so that the first ear plate 5 blocks the inflation hole 41. In this embodiment, the first ear plate 5 is threadedly connected to the piston rod 4. Under normal circumstances, the first ear plate 5 blocks the inflation hole 41. When the airbag 3 needs to be inflated with nitrogen, the first ear plate 5 can be unscrewed to expose the end of the piston rod 4.

Further, referring to FIG. 1 , in some embodiments, an end of the inflation hole 41 away from the airbag 3 is provided with an inflation screw plug 43. In this embodiment, the inflation screw plug 43 is generally in a closed state. When the airbag 3 needs to be inflated with nitrogen, the first ear plate 5 is unscrewed, and then the joint is slowly screwed in. The joint contains a thimble, and the thimble opens the inflation screw plug 43. The inflation screw plug 43 is connected to the nitrogen pump through a hose, and the airbag 3 inputs nitrogen of appropriate pressure through the inflation hole 41. The closing and opening of the inflation screw plug 43 can effectively adjust the pressure of the airbag 3.

2 and 3 , an embodiment of the present application provides a vibration reduction device, which includes: a cable clamp and the single-rod viscous damper 106 installed on the cable clamp. In this embodiment, the cable clamp includes a first cable clamp 101 and a second cable clamp 102, the first cable clamp 101 and the second cable clamp 102 are semicircular clamps, the first cable clamp 101 and the second cable clamp 102 clamp the inclined cable 103 through a bolt 104, a rubber pad 105 is provided between the first cable clamp 101 and the inclined cable 103 and between the second cable clamp 102 and the inclined cable 103, the rubber pad 105 fills the gap between the first cable clamp 101 and the inclined cable 103 and between the second cable clamp 102 and the inclined cable 103, the second cable clamp 102 is connected to the single-rod viscous damper 106 through a pin 107, the other end of the single-rod viscous damper 106 is connected to an earring seat 108 through the pin 107, the two single-rod viscous dampers 106 can be symmetrically arranged along the central axis at an angle of 60°, and the vibration reduction device includes two single-rod viscous dampers 106. Among them, the single-rod viscous damper 106 has the advantages of saving space, full hysteresis curve, good energy consumption performance and stable material properties; designers can freely adjust the diameter of the flow hole 23 according to the characteristics of the inclined cable 103 to adjust the damping coefficient of the single-rod viscous damper 106; since the single-rod viscous damper 106 has a simple structure and greatly shortened size, the vibration reduction device assembled from two single-rod viscous dampers 106 can meet specific tasks with limited space.

Specifically, the assembly method of the single-rod viscous damper provided by the present application may include the following steps:

S1: Push the piston rod 4 to push the piston 2 to the leftmost end, so that the piston 2 fits with the second ear plate 6.

S2: Open the oil filling port 61 and connect an external oil pump.

S3: During the oil filling process, the piston 2 slides to the rightmost end, and the oil filling is completed when the oil outlet 71 continuously discharges oil.

S4: Unscrew the first ear plate 5, use the ejector pin of the joint to push open the inflation screw plug 43, the inflation screw plug 43 is connected to the nitrogen pump through a hose, and when the nitrogen filling of the airbag 3 is completed, close the inflation screw plug 43 and screw in the first ear plate 5.

S5: pushing the piston rod 4 to push the piston 2 to the middle position of the cylinder 1, closing the oil filling port 61 and the oil outlet 71.

In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims (10)

1. A single output rod viscous damper, comprising:

The cylinder barrel (1), a piston (2) is arranged in the cylinder barrel (1), and an air bag (3) is arranged on the piston (2);

The piston rod (4), the one end of piston rod (4) stretches into in cylinder (1) with piston (2) are connected, and the other end stretches out cylinder (1), be provided with in piston rod (4) and aerify hole (41), aerify hole (41) with gasbag (3) intercommunication, gasbag (3) set up in keeping away from the one end of piston rod (4).

2. Single-rod viscous damper according to claim 1, characterized in that a cavity (21) is provided in the piston (2), the air-bag (3) being mounted in the cavity (21).

3. Single-rod viscous damper according to claim 1, characterized in that the piston (2) is provided with a guide hole through which the piston rod (4) is connected to the air-bag (3), so that the inflation hole (41) communicates with the air-bag (3).

4. A single-rod viscous damper according to claim 3, characterized in that the end of the piston rod (4) is provided with a connecting portion (42), the connecting portion (42) extends into the air bag (3), the air bag (3) wraps the connecting portion (42), and the inflation hole (41) penetrates through the connecting portion (42).

5. Single-rod viscous damper according to claim 2, characterized in that a spacer (22) is provided at the corner of the cavity (21), the spacer (22) having an arcuate contact surface, which is in contact with the airbag (3).

6. Single-rod viscous damper according to claim 4, characterized in that the contact surface of the connecting part (42) with the balloon (3) is arranged in an arc shape.

7. Single-rod viscous damper according to claim 1, characterized in that the inflation hole (41) extends through the piston rod (4) axially from one end of the piston rod (4) to the other end of the piston rod (4).

8. The single-rod viscous damper according to claim 7, characterized in that a first ear plate (5) is screwed to the end of the piston rod (4) remote from the air bag (3), such that the first ear plate (5) seals the air charging hole (41).

9. Single-rod viscous damper according to claim 8, characterized in that the end of the inflation hole (41) remote from the balloon (3) is provided with an inflation plug (43).

10. A vibration damping device, comprising: a cable clip and a single rod viscous damper as claimed in any one of claims 1 to 9 mounted to the cable clip.