Filter structure for variable damping shock absorber and shock absorber with filter structure

Abstract

The invention relates to the field of shock absorbers, in particular to a filtering structure for a variable damping shock absorber and a shock absorber with the filtering structure, and the filtering structure comprises an oil inlet filter screen or / and an oil outlet filter screen; the oil inlet filter screen is arranged at an oil inlet of an electromagnetic valve in the shock absorber; the oil outlet filter screen is arranged at an oil outlet of an electromagnetic valve or / and a connecting body in the shock absorber; through the arrangement of the filtering structure, it can be guaranteed that oil entering and exiting the electromagnetic valve is filtered through the filtering net, and the clamping stagnation risk of the electromagnetic valve is reduced; and meanwhile, through cooperative use of the oil inlet filter screen and the oil outlet filter screen, it is guaranteed that oil, entering the electromagnetic valve, of the variable damping shock absorber is filtered through the filter screens no matter under any working condition, foreign matter is effectively prevented from entering the electromagnetic valve, and therefore the clamping stagnation risk of the electromagnetic valve is reduced.

Description

Technical Field

[0001] The invention relates to the field of shock absorbers, in particular to a filter structure for a variable damping shock absorber and a shock absorber having the filter structure. Background Art

[0002] As the core component of the variable damping shock absorber, the solenoid valve plays an irreplaceable role in adjusting the damping of the shock absorber. In the process of use, in addition to the manufacturing and assembly accuracy that will affect the product performance, the contaminant stagnation is also one of the important reasons for the failure of the variable damping shock absorber. The commonly used ways to reduce the risk of stagnation are:

[0003] 1. Improve the cleanliness requirements for machining and assembly of shock absorbers and solenoid valve parts;

[0004] 2. Add magnets to the shock absorber.

[0005] There are problems with the above two methods:

[0006] The cleanliness requirements for parts are high, and the cleaning, testing and management costs are high. In addition, new impurities will be generated as the shock absorber is used for a longer time.

[0007] Magnets cannot attract non-ferrous metals and non-metallic particles.

[0008] The existing patent CN 213575292 U - a solenoid valve shock absorber solenoid valve and shock absorber connection structure does not clearly define the technical solution to solve the above technical problems.

[0009] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the design of the existing shock absorber structure. Summary of the invention

[0010] The object of the present invention is to provide a filtering structure which can be applied to a variable damping shock absorber and can reduce the risk of electromagnetic valve sticking.

[0011] In order to achieve the above object, the technical solution adopted by the present invention is:

[0012] A filter structure for a variable damping shock absorber comprises an oil inlet filter and / or an oil outlet filter; the oil inlet filter is arranged at the oil inlet of a solenoid valve in the shock absorber; the oil outlet filter is arranged at the oil outlet of the solenoid valve and / or a connector in the shock absorber.

[0013] The oil inlet filter comprises a first oil inlet filter; the first oil inlet filter comprises a filter body, and the filter body is provided with filter holes.

[0014] The filter body comprises an outer ring body; a middle protrusion is arranged on the outer ring body; a middle through hole is also arranged on the outer ring body; the middle through hole extends from the outer ring body to the inside of the middle protrusion; and a filter hole is arranged on the middle protrusion.

[0015] The middle protrusion is arc-shaped on the side away from the outer ring body; the filter body is round cap-shaped; when installed, the middle protrusion on the first oil inlet filter is arranged on the outer ring body toward the side close to the oil inlet of the solenoid valve or the shock absorber cylinder.

[0016] The oil outlet filter includes a first oil outlet filter; the first oil outlet filter is arranged at the oil outlet of the connector.

[0017] The oil outlet filter screen comprises a main oil outlet filter screen, and the main oil outlet filter screen is connected to the main oil outlet of the solenoid valve.

[0018] The main oil outlet filter screen has a ring-shaped horizontal projection; the main oil outlet filter screen is sleeved on the main valve housing of the solenoid valve.

[0019] The oil outlet filter screen also includes a pilot oil outlet filter screen, and the pilot oil outlet filter screen is arranged at the pilot oil outlet of the solenoid valve.

[0020] The oil inlet filter screen or the oil outlet filter screen is formed by stamping, weaving or etching.

[0021] A shock absorber comprises a cylinder, on which a solenoid valve is arranged; the solenoid valve and the cylinder are connected via a connector; the solenoid valve is provided with a filter structure for the variable damping shock absorber; in the filter structure, an oil inlet filter is arranged between the connector and the solenoid valve.

[0022] The advantages of the present invention are:

[0023] The invention discloses a filter structure for a variable damping shock absorber and a shock absorber with the filter structure.

[0024] The present invention can ensure that the oil entering and exiting the solenoid valve is filtered through the filter screen by setting the filtering structure, thereby reducing the risk of the solenoid valve being stuck.

[0025] At the same time, through the coordinated use of the oil inlet filter and the oil outlet filter, it is ensured that the oil entering the solenoid valve of the variable damping shock absorber is filtered through the filter under any working conditions, effectively preventing foreign matter from entering the solenoid valve, thereby reducing the risk of solenoid valve sticking. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0027] Figure 1It is a structural schematic diagram of the first oil inlet filter and the oil outlet filter installed on the shock absorber of the present invention.

[0028] Figure 2 It is a schematic diagram of the structure when the middle protrusion on the first oil inlet filter of the present invention is installed toward the shock absorber cylinder.

[0029] Figure 3 It is a schematic diagram of the structure of the filter structure of the present invention installed on the vibration damper after etching.

[0030] Figure 4 This is a schematic diagram of the structure of the filter structure of the present invention being installed on the shock absorber after being woven and processed.

[0031] Figure 5 It is the first oil inlet filter screen formed in the present invention.

[0032] Figure 6 It is the first oil inlet filter screen etched and formed in the present invention.

[0033] The marks in the above figure are:

[0034] 10. Solenoid valve, 20. First oil inlet filter, 30. First oil outlet filter, 40. Connector, 11. Main valve housing, 22. Main oil outlet, 201. Outer ring body, 202. Middle protrusion, 31. Main oil outlet filter, 32. First oil outlet filter. DETAILED DESCRIPTION

[0035] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0036] A filtering structure for a variable damping shock absorber comprises an oil inlet filter and / or an oil outlet filter; the oil inlet filter is arranged at the oil inlet of a solenoid valve 10 in the shock absorber; the oil outlet filter is arranged at the oil outlet of the solenoid valve 10 and / or a connector 40 in the shock absorber; the present invention can ensure that the oil in and out of the solenoid valve 10 is filtered through the filter through the setting of the filtering structure, thereby reducing the risk of the solenoid valve 10 getting stuck.

[0037] At the same time, by using the oil inlet filter and the oil outlet filter in coordination, it is ensured that the oil entering the solenoid valve 10 of the variable damping shock absorber is filtered through the filter under any working conditions, effectively preventing foreign matter from entering the interior of the solenoid valve 10, thereby reducing the risk of the solenoid valve 10 getting stuck.

[0038] The filtering structure of the present invention is mainly suitable for shock absorbers; it is mainly used to filter and protect the oil inlet and oil outlet of the solenoid valve 10.

[0039] Specifically, the filtering structure disclosed in the present invention mainly includes an oil inlet filter and / or an oil outlet filter; the oil inlet filter is arranged at the oil inlet of the solenoid valve 10 in the shock absorber; the oil outlet filter is arranged at the oil outlet of the solenoid valve 10 and / or the connector 40 in the shock absorber; in the present invention, the oil inlet filter is used to filter the oil entering the solenoid valve 10; the oil outlet filter is used to filter the oil flowing out of the solenoid valve 10 or the connector 40; the filtering structure disclosed in the present invention can be used alone or simultaneously, that is, when the filtering structure is suitable for a shock absorber, it can include both the oil inlet filter and the oil outlet filter, or it can include only one of them.

[0040] In the present invention, the oil inlet filter is installed at the oil inlet of the solenoid valve 10 in the shock absorber; when the shock absorber is working, the oil enters the solenoid valve 10 after being filtered through the oil inlet filter, thereby preventing impurities from entering the interior of the solenoid valve 10 and reducing the risk of the solenoid valve 10 getting stuck.

[0041] Layout position of the oil outlet filter: The oil outlet filter can be installed at the oil outlet of the solenoid valve 10 in the shock absorber, or at the oil outlet of the connector 40, or at both positions.

[0042] In addition, the oil outlet of the solenoid valve 10 in the present invention may be the main oil outlet 22 or the pilot oil outlet on the solenoid valve 10 ; the oil outlet of the connector 40 in the present invention may be the total oil outlet 41 on the connector.

[0043] When the shock absorber is not working (such as during transportation, installation, storage, etc.), the oil enters the solenoid valve 10 after being filtered through the oil outlet filter under the action of gravity, preventing impurities from entering the solenoid valve 10 and further reducing the risk of the solenoid valve 10 getting stuck.

[0044] Furthermore, in the present invention, the oil inlet filter includes a first oil inlet filter 20; the first oil inlet filter 20 includes a filter body, and the filter body is provided with filter holes; the filter body of the present invention is the main structure of the oil inlet filter, and the setting of the filter holes facilitates the subsequent oil to pass through the oil inlet filter and facilitates the subsequent oil inlet operation.

[0045] Filter body: This is the core component of the oil inlet filter and the main structural part of the oil inlet filter. The filter holes are mainly holes set on the filter body to filter impurities in the oil. The size, shape and distribution of the filter holes directly affect the filtering effect and the flow capacity of the oil.

[0046] Furthermore, in the present invention, the filter body includes an outer ring body 201; a middle protrusion 202 is provided on the outer ring body 201; a middle through hole is also provided on the outer ring body 201; the middle through hole extends from the outer ring body 201 to the inside of the middle protrusion 202; a filter hole is provided on the middle protrusion 202; the outer ring body 201: this is the main part of the filter body, which plays a supporting and fixing role; the middle protrusion 202: a structure located at the center of the outer ring body 201 and protruding outward; the middle through hole: a channel extending from the outer ring body 201 to the inside of the middle protrusion 202, used for the circulation of oil; the filter hole: arranged on the middle protrusion 202, used to filter impurities in the oil.

[0047] Function of the middle protrusion 202: Increase the filtering area: The design of the middle protrusion 202 increases the surface area of ​​the filter, thereby improving the filtering efficiency; at the same time, it can be plugged into the main valve seat of the solenoid valve 10; at the same time, the protrusion structure can guide the flow of oil, reduce local pressure concentration, and optimize the flow performance of the oil.

[0048] The middle through hole connects the outer ring body 201 and the middle protrusion 202 to ensure that the oil can smoothly pass through the filter and enter the solenoid valve 10; the design of the through hole can enhance the structural stability of the filter body and prevent deformation under the action of high-pressure oil.

[0049] Furthermore, in the present invention, the middle protrusion 202 is arc-shaped on the side away from the outer ring body 201; the filter body is in a round hat shape; the middle protrusion 202 is arc-shaped: the middle protrusion 202 is arc-shaped on the side away from the outer ring body 201; this arc-shaped design has the following key functions: optimizing oil flow: the arc-shaped surface can guide the oil to flow smoothly, reduce flow resistance and turbulence, thereby improving the flow efficiency of the oil; increasing the filtration area: the arc-shaped structure can provide a larger surface area than the plane structure, thereby increasing the number of filter holes and the filtration area, and improving the filtration efficiency; structural strength: the arc-shaped structure can better disperse the oil pressure, enhance the structural strength of the middle protrusion 202, and prevent deformation under the action of high-pressure oil.

[0050] The overall shape of the filter body is a round hat design: the filter body is in a round hat shape, and this design has the following advantages: uniform pressure distribution: the round hat structure can evenly distribute the oil pressure on the filter surface, reduce local stress concentration, and thus extend the service life of the filter; increase the filtration area: compared with the flat filter, the round hat structure can provide a larger effective filtration area, further improving the filtration efficiency; optimize space utilization: the round hat design can better adapt to the compact space inside the shock absorber without reducing the flow capacity.

[0051] During installation, the middle protrusion on the first oil inlet filter is arranged on the outer ring body toward the side close to the oil inlet port of the solenoid valve or the shock absorber cylinder; based on this design, it can be known that; when the first oil inlet filter is installed in the present invention, the middle protrusion in its structure can be arranged toward the side close to the oil inlet port of the solenoid valve or the shock absorber cylinder as needed; the basic function of this arrangement is to ensure that the oil can be smoothly filtered through the first oil inlet filter before entering the solenoid valve.

[0052] In the present invention, the middle protrusion is located at the center of the outer ring body, protruding outward, and is provided with filter holes for filtering impurities in the oil.

[0053] In the specific implementation;

[0054] When the middle protrusion on the first oil inlet filter is arranged toward the oil inlet of the solenoid valve; this arrangement mainly conforms to the flow direction of the oil and reduces the oil running resistance. At the same time, the oil inlet on the solenoid valve can play a good restraining and limiting role, which better ensures the accuracy and stability of the layout position of the first oil inlet filter.

[0055] In addition, in the present invention, the oil will be filtered through the filter holes on the middle protrusion before entering the solenoid valve; this arrangement can effectively prevent impurities from entering the interior of the solenoid valve and reduce the risk of the solenoid valve getting stuck.

[0056] The raised arc design in the middle can optimize the oil flow, reduce flow resistance and turbulence, while increasing the filtration area and improving filtration efficiency.

[0057] When the first oil inlet filter is arranged toward the shock absorber cylinder: when the oil flows from the shock absorber cylinder to the solenoid valve, it will also be filtered through the filter holes on the middle protrusion first; because the solenoid valve has a larger arrangement space on the side close to the shock absorber cylinder, the problem of installation interference with adjacent components when the first oil inlet filter is arranged is reduced, that is, with the above arrangement, the first oil inlet filter can be directly plugged into the connector; the internal space occupied by the first oil inlet filter is reduced; thereby reducing the difficulty of arranging the first oil inlet filter.

[0058] Furthermore, in the present invention, the oil outlet filter includes a first oil outlet filter 30; the first oil outlet filter 30 is arranged at the oil outlet of the connecting body 40; the first oil outlet filter 30 is installed at the oil outlet of the connecting body 40; the connecting body 40 is a component in the shock absorber used to connect the solenoid valve 10 and the outer cylinder, and the function of the oil outlet filter at this position is to filter the oil flowing from the outer cylinder of the shock absorber to the solenoid valve 10.

[0059] Furthermore, the oil outlet filter in the present invention includes a main oil outlet filter 31, and the main oil outlet filter 31 is connected to the main oil outlet 22 of the solenoid valve 10; the main oil outlet filter 31: this is an important component of the oil outlet filter, which is specifically used to filter the oil flowing out of the main oil outlet 22 of the solenoid valve 10.

[0060] The main oil outlet filter 31 is installed on the main oil outlet 22 of the solenoid valve 10 and is directly connected to the main oil circuit of the solenoid valve 10. The main function of the main oil outlet filter 31 is to filter the oil flowing out of the main oil outlet 22 of the solenoid valve 10 to prevent impurities from entering other parts of the shock absorber (such as the outer cylinder or other hydraulic systems). This helps to keep the entire hydraulic system clean and reduce malfunctions caused by impurities.

[0061] Furthermore, in the present invention, the main oil outlet filter 31 is horizontally projected in a ring shape; the main oil outlet filter 31 is sleeved on the main valve housing 11 of the solenoid valve 10; based on such a setting, each main oil port around the main valve body of the solenoid valve 10 can be blocked, so as to facilitate subsequent oil filtering.

[0062] The horizontal projection of the main oil outlet filter 31 is annular. The main purpose of this design is to increase the filtering area: the annular structure can provide a larger filtering area, thereby improving the filtering efficiency; and facilitate the subsequent sleeve installation on the main valve housing 11.

[0063] In the present invention, the main oil outlet filter 31 is sleeved on the main valve housing 11 of the solenoid valve 10. This installation method is compact in structure: it is directly sleeved on the main valve housing 11, reducing the need for additional installation space.

[0064] Furthermore, in the present invention, the oil outlet filter also includes a pilot oil outlet filter 32, and the pilot oil outlet filter 32 is arranged at the pilot oil outlet of the solenoid valve 10; the pilot oil outlet filter 32 is installed at the pilot oil outlet of the solenoid valve 10, and its main function is to filter the oil flowing out of the pilot valve; this design ensures that the oil in the pilot system is filtered before entering other related components.

[0065] Furthermore, in the present invention, the oil inlet filter or the oil outlet filter is formed by stamping, weaving or etching; based on the above design, the processing and forming of the oil inlet filter or the oil outlet filter is facilitated.

[0066] Stamping is a traditional filter manufacturing process that applies pressure to metal sheets through a die to form the desired filter shape and pore size.

[0067] It is characterized by high production efficiency and is suitable for mass production.

[0068] Braiding is the process of making filters by weaving metal wires into a mesh structure.

[0069] Its characteristics are that it can achieve a large filtration area and is suitable for a variety of shapes and sizes.

[0070] Etch forming is a process whereby holes and shapes are formed into sheet metal by chemical etching.

[0071] Its characteristics are that the etching process can achieve extremely high processing accuracy, with the minimum aperture reaching 0.05mm and the tolerance controlled at ±0.0075mm; since it does not involve mechanical processing, the surface of the etched product has no burrs or pressure points, and does not affect the product function; etching can achieve complex shapes and patterns that are difficult to achieve by stamping and weaving, such as brand logos.

[0072] A shock absorber comprises a cylinder, on which a solenoid valve 10 is provided; the solenoid valve 10 and the cylinder are connected via a connector 40; the solenoid valve 10 is provided with a filter structure for the variable damping shock absorber; in the filter structure, an oil inlet filter is arranged between the connector 40 and the solenoid valve 10.

[0073] The shock absorber disclosed in the present invention mainly includes the following structures:

[0074] Cylinder: As the main structure of the shock absorber, it is used to contain oil and other components.

[0075] Solenoid valve 10: installed on the cylinder, used to control the flow of oil, thereby adjusting the damping force.

[0076] Connector 40: used to connect the solenoid valve 10 and the cylinder to ensure the stability of the structure and the smooth flow of oil.

[0077] Filter structure: including an oil inlet filter and an oil outlet filter, which are used to filter impurities in the oil to ensure the normal operation of the solenoid valve 10.

[0078] Oil inlet filter: arranged between the connector 40 and the solenoid valve 10; this design ensures that the oil is filtered before entering the solenoid valve 10, preventing impurities from entering the solenoid valve 10 and reducing the risk of sticking.

[0079] Oil outlet filter: The oil outlet filter will be installed at the oil outlet of the solenoid valve 10 to filter the oil flowing out of the solenoid valve 10.

[0080] Filtering function: The oil inlet filter and the oil outlet filter filter the oil when it enters and flows out of the solenoid valve 10 respectively, ensuring the cleanliness of the oil and improving the reliability of the system.

[0081] By filtering impurities in the oil, the risk of the solenoid valve 10 getting stuck is reduced, and the service life of the shock absorber is extended.

[0082] Compact design: The oil inlet filter is arranged between the connector 40 and the solenoid valve 10, without adding extra space, suitable for compact vehicle chassis design

[0083] The design of this shock absorber combines the dynamic adjustment capability of the solenoid valve 10 with an efficient filtering structure, and is suitable for vehicle suspension systems that require high-precision damping control. Specific embodiment:

[0085] The filtering structure disclosed in the present invention mainly includes an oil inlet filter and an oil outlet filter; the oil inlet filter is arranged between the connector 40 and the oil inlet of the solenoid valve 10, so that during recovery and compression, the oil must flow through the oil inlet filter before entering the solenoid valve 10.

[0086] The oil outlet filter mainly includes a first oil outlet filter 30 , a main oil outlet filter 31 and a pilot oil outlet filter 32 .

[0087] The first oil outlet filter 30 is disposed between the connector 40 and the oil outlet of the solenoid valve 10 , so that when the shock absorber is not working, the oil can enter the solenoid valve 10 only after flowing through the first oil outlet filter 30 under the action of gravity.

[0088] The first oil inlet filter 20 is preferably configured in a convex non-planar shape, such as a protruding round hat shape, so as not to reduce the oil inlet flow cross section.

[0089] The first oil outlet filter 30 is arranged at the main oil outlet; the main oil outlet filter 31 is arranged at the main oil outlet, and the first oil outlet filter 32 is arranged at the first oil outlet.

[0090] The oil inlet filter and the oil outlet filter can be installed in any position such as the variable damping shock absorber, the solenoid valve 10, the connector 40, between the solenoid valve 10 and the connector 40 in a variety of ways. The oil inlet filter and the oil outlet filter can be set at the same time, or only one of them can be set.

[0091] The oil inlet filter or the oil outlet filter can be made by punching small holes in thin steel sheets or chemically etching small holes, or it can be made by weaving steel wires. Filters made in different ways can be used simultaneously or in combination.

[0092] The shock absorber structure disclosed in the present invention can ensure that the oil entering the solenoid valve 10 of the variable damping shock absorber is filtered through the filter screen under any working conditions, effectively preventing foreign matter from entering the interior of the solenoid valve 10, thereby reducing the risk of the solenoid valve 10 getting stuck.

[0093] When the shock absorber is working, under the restoring stroke, the piston rod moves upward, the oil in the upper chamber of the piston valve is compressed, a part of the oil in the upper chamber of the piston valve enters the middle cylinder, and enters the solenoid valve 10 through the oil inlet filter arranged between the inlet of the solenoid valve 10 and the connector 40, and flows into the outer cylinder of the shock absorber through the first oil outlet filter 30 arranged between the solenoid valve 10 and the connector 40; at this time, the oil inlet of the solenoid valve 10 is high pressure, and the oil outlet is low pressure, and the oil entering the solenoid valve 10 is filtered through the oil inlet, thereby reducing the risk of the solenoid valve 10 getting stuck.

[0094] During the compression stroke, the piston rod moves downward, and the oil in the lower chamber of the piston valve is compressed. A part of the oil in the lower chamber enters the upper chamber of the piston valve, flows to the middle cylinder, and enters the solenoid valve 10 through the oil inlet filter arranged between the inlet of the solenoid valve 10 and the connector 40, and flows into the outer cylinder of the shock absorber through the oil outlet filter arranged between the solenoid valve 10 and the connector 40; at this time, the oil inlet of the solenoid valve 10 is still high pressure, and the oil outlet is low pressure. The oil entering the solenoid valve 10 is filtered through the oil inlet, reducing the risk of the solenoid valve 10 getting stuck.

[0095] When the shock absorber is not working (transportation, installation, storage, etc.), the shock absorber oil flows under the action of gravity, and the oil may enter the solenoid valve 10 from the outer cylinder of the shock absorber through the connector 40 and the oil outlet filter arranged between the connector 40 and the outlet of the solenoid valve 10. At this time, the oil outlet filter can filter the oil entering the solenoid valve 10, thereby effectively preventing foreign matter from entering the interior of the solenoid valve 10 and reducing the risk of the solenoid valve 10 getting stuck.

[0096] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A filter structure for a variable damping shock absorber, characterized in that: It comprises an oil inlet filter and / or an oil outlet filter; the oil inlet filter is arranged at the oil inlet of the electromagnetic valve (10) in the shock absorber; the oil outlet filter is arranged at the oil outlet of the electromagnetic valve (10) and / or the connector (40) in the shock absorber.

2. A filter structure for a variable damping vibration absorber according to claim 1, characterized in that: The oil inlet filter comprises a first oil inlet filter (20); the first oil inlet filter (20) comprises a filter body, and filter holes are arranged on the filter body.

3. A filter structure for a variable damping vibration absorber according to claim 2, characterized in that: The filter screen body comprises an outer ring body (201); a middle protrusion (202) is provided on the outer ring body (201); a middle through hole is also provided on the outer ring body (201); the middle through hole extends from the outer ring body (201) to the inside of the middle protrusion (202); and a filter hole is provided on the middle protrusion (202).

4. A filter structure for a variable damping vibration absorber according to claim 3, characterized in that: The middle protrusion (202) is arc-shaped on the side away from the outer ring body (201); the filter body is round-hat-shaped; when installed, the middle protrusion on the first oil inlet filter is arranged on the outer ring body toward the side close to the oil inlet of the solenoid valve or the shock absorber cylinder.

5. A filter structure for a variable damping vibration absorber according to claim 1, characterized in that: The oil outlet filter comprises a first oil outlet filter (30); the first oil outlet filter (30) is arranged at the oil outlet of the connector (40).

6. A filter structure for a variable damping vibration absorber according to any one of claims 1 or 5, characterized in that: The oil outlet filter comprises a main oil outlet filter (31), and the main oil outlet filter (31) is connected to the main oil outlet (22) of the solenoid valve (10).

7. A filter structure for a variable damping vibration absorber according to claim 6, characterized in that: The main oil outlet filter (31) has a ring shape in horizontal projection; the main oil outlet filter (31) is sleeved on the main valve housing of the solenoid valve (10).

8. A filter structure for a variable damping vibration absorber according to any one of claims 1 or 5, characterized in that: The oil outlet filter screen also includes a pilot oil outlet filter screen (32), and the pilot oil outlet filter screen (32) is arranged at the pilot oil outlet of the solenoid valve (10).

9. A filter structure for a variable damping vibration absorber according to claim 2, characterized in that: The oil inlet filter screen or the oil outlet filter screen is formed by stamping, weaving or etching.

10. A shock absorber, characterized in that: It comprises a cylinder, on which a solenoid valve (10) is provided; the solenoid valve (10) and the cylinder are connected via a connector (40); the solenoid valve (10) is provided with a filter structure for a variable damping shock absorber as claimed in any one of claims 1 to 9; in the filter structure, an oil inlet filter is arranged between the connector (40) and the solenoid valve (10).

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