Damping-variable double-valve shock absorber

Abstract

The utility model relates to the field of motor vehicle chassis vibration reduction, in particular to a variable-damping double-valve vibration absorber which comprises an inner cylinder, a piston rod, an outer cylinder, a connecting module and a control valve assembly, and a piston is arranged in the inner cylinder and divides the inner cylinder into a recovery chamber and a compression chamber; the inner cylinder is sleeved with the outer cylinder, and a middle chamber is formed between the outer cylinder and the inner cylinder. A compression runner communicating with the compression chamber and a recovery runner communicating with the middle chamber are arranged in the connecting module. The compression control valve assembly is arranged in the compression flow channel; the recovery control valve assembly is arranged in the recovery flow channel; the energy storage assembly communicates with the compression flow channel and the recovery flow channel. According to the utility model, the separator is arranged in the connecting module to define the independent compression inlet and the independent recovery inlet, and the compression control valve assembly and the recovery control valve assembly which are respectively arranged in the independent flow channels are combined, so that a compression oil path and a recovery oil path can be clearly and reliably separated; accurate and independent adjustment of the damping force of the compression stroke and the recovery stroke of the shock absorber is achieved.

Description

Technical Field

[0001] This utility model relates to the field of motor vehicle chassis vibration reduction, specifically to a variable damping dual-valve vibration damper. Background Technology

[0002] Vehicle shock absorbers are the core components of an automotive suspension system. Their main function is to absorb and dampen impacts from the road surface and suppress vehicle vibrations, thereby improving ride comfort and handling stability. Traditional passive shock absorbers typically have fixed damping characteristics, making it difficult to meet the comprehensive suspension performance requirements under different driving conditions (such as different road conditions, driving speeds, load variations, and driving modes). Utility Model Content

[0003] The technical problem to be solved by this utility model is how to achieve a highly integrated and simpler oil circuit construction scheme, while avoiding the problem of cavitation during the empty stroke of oil-gas mixing. The purpose is to provide a variable damping dual-valve shock absorber, which realizes the independent adjustment of the compression stroke and the recovery stroke of the shock absorber, and at the same time achieves the purpose of oil-gas separation.

[0004] This utility model is achieved through the following technical solution:

[0005] A variable damping dual-valve vibration damper, characterized in that it comprises:

[0006] Inner cylinder;

[0007] A piston rod, one end of which is connected to a piston, the piston being disposed in the inner cylinder and dividing the inner cylinder into a recovery chamber and a compression chamber;

[0008] An outer cylinder is fitted outside the inner cylinder and forms an intermediate chamber therebetween, the intermediate chamber being connected to the recovery chamber through a recovery through hole;

[0009] An isolator is disposed between the connecting module and the inner cylinder, separating the compression chamber and the intermediate chamber, and is equipped with a compression inlet communicating with the compression chamber and a recovery inlet communicating with the intermediate chamber;

[0010] A connecting module is fixedly connected to one end of the outer cylinder and is configured with a recovery outlet and a compression outlet communicating with the transition chamber; the flow channel between the compression inlet and the compression outlet is configured as a compression flow channel, and the flow channel between the recovery inlet and the recovery outlet is configured as a recovery flow channel.

[0011] A compression control valve assembly disposed in the compression flow passage;

[0012] A recovery control valve assembly is disposed in the recovery flow channel;

[0013] An energy storage component is fixed to one side of the connection module and communicates with the transition chamber;

[0014] The transition chamber is a cavity located inside the connecting module, or a cavity jointly constructed by the connecting module and the chassis connecting device.

[0015] Optionally, the isolation member is provided with an isolation through hole, which communicates with the compression inlet, and the isolation member is used to isolate the compression inlet and the recovery inlet.

[0016] Optionally, the compression control valve assembly includes: a compression solenoid valve and a recovery compensation valve, wherein the compression channel of the compression solenoid valve is disposed on the oil line flowing from the compression inlet to the transition chamber; and the recovery compensation valve is disposed on the oil line flowing from the transition chamber to the compression chamber.

[0017] The recovery control valve assembly includes a recovery solenoid valve and a compression compensation valve. The recovery channel of the recovery solenoid valve is provided in the oil line from the recovery inlet to the transition chamber; the compression compensation valve is provided in the oil line from the transition chamber to the intermediate chamber.

[0018] Optionally, the recovery compensation valve and the compression compensation valve are one-way shut-off valves.

[0019] Optionally, the compression control valve assembly further includes a second compression damping channel, which is connected in parallel with the compression channel of the compression solenoid valve;

[0020] The recovery control valve assembly further includes a second recovery damping channel, which is connected in parallel with the recovery channel of the recovery solenoid valve.

[0021] Optionally, the energy storage component includes: an energy storage device, a first through hole, an energy storage channel, and a second through hole, wherein both the first through hole and the second through hole are disposed on the connection module;

[0022] The energy storage device is fixed to one side of the connection module. One end of the energy storage channel is connected to the transition chamber through the first through hole, and the other end of the energy storage channel is connected to the energy storage device through the second through hole.

[0023] Optionally, the energy storage device includes an outer housing and a floating piston. The floating piston is disposed inside the outer housing and divides the outer housing into a compensation chamber and a gas chamber. The compensation chamber communicates with the energy storage channel through the second through hole. The gas chamber is sealed, and the floating piston is slidably sealed to the inner side of the outer housing.

[0024] Optionally, it also includes a guide, which is fixedly connected to the other end of the inner cylinder and the outer cylinder, and the other end of the piston rod passes through the guide to contact the outside.

[0025] Optionally, it also includes a chassis connection device, which is fixedly connected to the connection module.

[0026] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0027] This invention defines independent compression and recovery inlets by setting up isolation components, and combines compression control valve assemblies and recovery control valve assemblies respectively set in independent flow channels. This clearly and reliably separates the compression and recovery oil circuits, achieving precise and independent adjustment of the damping force of the shock absorber's compression and recovery strokes. This improves the vehicle's adaptability under complex and variable working conditions. At the same time, independent compression and recovery oil circuits are directly set in the connecting module, and independent solenoid valves are set in the compression and recovery oil circuits respectively, thereby realizing dual-valve vibration reduction, and the oil circuit construction is simple.

[0028] This invention also integrates an energy storage component with an internal oil-gas separator, achieving reliable and efficient oil-gas separation. This effectively suppresses the vaporization of oil or the mixing of gas during operation, avoiding damping failure or idling caused by oil-gas mixing. Attached Figure Description

[0029] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and are included in and constitute a part of this specification, but do not constitute a limitation on the embodiments of the present invention.

[0030] Figure 1 This is a structural schematic diagram of a variable damping dual-valve vibration damper according to the present invention.

[0031] Figure 2 This is a cross-sectional view of a variable damping dual-valve vibration damper according to the present invention.

[0032] Figure 3 This is a schematic diagram of the connection module according to the present invention.

[0033] Figure 4 This is a schematic diagram of the connection module according to the present invention.

[0034] Figure 5 This is a structural schematic diagram of the control valve assembly according to the present invention.

[0035] Figure 6This is a structural schematic diagram of the isolation component according to the present invention.

[0036] Reference numerals: 1-Inner cylinder, 2-Piston rod, 3-Piston, 4-Outer cylinder, 5-Isolator, 6-Connecting module, 7-Energy storage assembly, 8-Chassis connecting device, 9-Guide;

[0037] 11-Restoration chamber, 12-Compression chamber, 13-Restoration through hole, 41-Intermediate chamber, 51-Isolation through hole, 61-Compression flow channel, 62-Restoration flow channel, 611-Compression inlet, 612-Compression outlet, 613-Compression control valve assembly, 614-Compression channel, 615-Second compression damping channel, 621-Restoration inlet, 622-Restoration outlet, 623-Restoration control valve assembly, 624-Restoration channel, 625-Second restoration damping channel, 63-Transition chamber, 6131-Compression solenoid valve, 6132-Restoration compensation valve, 6231-Restoration solenoid valve, 6232-Compression compensation valve, 71-Accumulator, 711-Outer housing, 712-Floating piston, 7111-Compensation chamber, 7112-Gas chamber, 72-Accumulation channel, 721-First through hole, 722-Second through hole. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0039] It should also be noted that, for ease of description, only the parts relevant to this utility model are shown in the accompanying drawings.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] To ensure vehicles achieve optimal driving performance under various operating conditions, variable damping shock absorbers (also known as adaptive or semi-active shock absorbers) have been developed. These shock absorbers can actively adjust their damping force based on the vehicle's real-time status or driver settings. A common technique for achieving variable damping force is to use electronically controlled actuators, such as solenoid valves, to alter the flow cross-section or path of the working medium (usually oil) inside the shock absorber, thereby changing the flow resistance and adjusting the damping force.

[0043] As vehicle performance requirements continue to rise, simply achieving overall damping force adjustment is sometimes insufficient. Research shows that independent damping control of the shock absorber's compression and recovery strokes can more precisely optimize vehicle comfort and handling. Achieving this bidirectional, independently adjustable damping control typically requires designing more complex valve systems and internal flow channels to distinguish and separately adjust the oil flow states in the two strokes.

[0044] Furthermore, during operation, especially when subjected to high-frequency vibrations or in gas-pressurized designs (such as monotube shock absorbers), the working fluid may be affected by the mixing of gases (such as air or pre-charged nitrogen) or cavitation, impacting its physical properties. This can lead to unstable damping force, delayed response, abnormal noises, or even temporary failure (commonly known as "free travel"), reducing damping effectiveness and ride comfort. Therefore, in high-performance or demanding shock absorber designs, oil-gas separation measures are typically considered. For example, by incorporating a compensation chamber (accumulator) with isolation elements (such as a floating piston), gas and working fluid can be effectively isolated to ensure stable, reliable, and consistent damping performance.

[0045] Where there is no conflict, the embodiments and features described herein can be combined with each other. Reference will be made below. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The present invention will be described in detail with reference to its implementation methods.

[0046] Example 1

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a variable damping dual-valve shock absorber is provided, including: an inner cylinder 1, a piston rod 2, an outer cylinder 4, an isolator 5, a connecting module 6, a control valve assembly, and a guide 9.

[0048] One end of the piston rod 2 is connected to the piston 3. The piston 3 is set in the inner cylinder 1 and divides the inner cylinder 1 into a recovery chamber 11 and a compression chamber 12. The outer cylinder 4 is sleeved outside the inner cylinder 1 and forms an intermediate chamber 41 between it and the inner cylinder 1. The intermediate chamber 41 is connected to the recovery chamber 11 through the recovery through hole 13.

[0049] The isolator 5 is disposed between the connecting module 6 and the inner cylinder 1, and separates the compression chamber 12 and the intermediate chamber 41, and is equipped with a compression inlet 611 communicating with the compression chamber 12 and a recovery inlet 621 communicating with the intermediate chamber 41.

[0050] The connecting module 6 is fixedly connected to one end of the outer cylinder 4 and is equipped with a recovery outlet 622 and a compression outlet 612 that communicate with the transition chamber 63; the flow channel between the compression inlet 611 and the compression outlet 612 is configured as a compression flow channel 61, and the flow channel between the recovery inlet 621 and the recovery outlet 622 is configured as a recovery flow channel 62.

[0051] The energy storage component 7 is fixed on one side of the connecting module 6 and communicates with the transition chamber 63. In addition, the guide 9 is fixedly connected to the other end of the inner cylinder 1 and the outer cylinder 4, and the other end of the piston rod 2 passes through the guide 9 and contacts the outside.

[0052] The shock absorber also includes a chassis connection device 8, which is fixedly connected to the connection module 6. The transition chamber 63 is a cavity set inside the connection module 6, or a cavity jointly constructed by the connection module 6 and the chassis connection device 8.

[0053] A connecting module 6 is arranged on the side of piston 3 near compression chamber 12 (i.e., the end away from the extended end of piston rod 2), which is fixedly connected to the inner cylinder 1 and outer cylinder 4. The connecting module 6 has a compression flow channel 61 communicating with compression chamber 12 and a recovery flow channel 62 communicating with intermediate chamber 41. The compression flow channel 61 is used to handle the oil flow during the compression stroke. The recovery flow channel 62 is used to handle the oil flow during the recovery stroke. The intermediate chamber 41 is connected to the recovery chamber 11 through the recovery through hole 13, thereby handling the oil flow during the recovery stroke.

[0054] The connecting module 6 is fixedly connected to one end of the outer cylinder 4. The isolator 5 is set between the connecting module 6 and the inner cylinder 1, and separates the compression chamber 12 and the intermediate chamber 41. It is equipped with a compression inlet 611 communicating with the compression chamber 12 and a recovery inlet 621 communicating with the intermediate chamber 41. An isolation through hole 51 is provided in the isolator 5, and the isolation through hole 51 is communicating with the compression inlet 611.

[0055] The isolator 5 physically separates the compression chamber 12 and the intermediate chamber 41, ensuring that the oil in these two areas does not mix before entering the control valve assembly. Simultaneously, the compression inlet 611 of the isolator 5 connects to the compression chamber 12, guiding the oil during the compression stroke into the connecting module 6; the recovery inlet 621 of the isolator 5 connects to the intermediate chamber 41 (and consequently to the recovery chamber 11), guiding the oil during the recovery stroke into the connecting module 6.

[0056] The transition chamber 63 is the intersection of multiple flow channels. The connecting module 6 is equipped with a recovery outlet 622 and a compression outlet 612 that are connected to the transition chamber 63. The energy storage component 7 is connected to the transition chamber 63, so that the energy storage component 7 participates in the entire oil circulation and pressure regulation.

[0057] The flow channel between the compression inlet 611 and the compression outlet 612 is configured as a compression flow channel 61, that is, the oil enters from the compression inlet 611, is controlled by the control valve assembly in the compression flow channel 61, and then flows out from the compression outlet 612 to the transition chamber 63.

[0058] The flow channel between the restoration inlet 621 and the restoration outlet 622 is configured as the restoration flow channel 62; that is, the oil enters from the restoration inlet 621, and after being controlled by the control valve assembly in the restoration flow channel 62, it flows out from the restoration outlet 622 to the transition chamber 63.

[0059] Compression control valve assembly 613 is disposed in compression flow channel 61 and is used to control the damping force during the compression stroke; recovery control valve assembly 623 is disposed in recovery flow channel 62 and is used to control the damping force during the recovery stroke. The two control valve assemblies are disposed separately to achieve bidirectional independent adjustable damping.

[0060] Both the compression control valve assembly 613 and the recovery control valve assembly 623 include three parts: active control, passive compensation, and auxiliary compensation.

[0061] The compression control valve assembly 613 includes: a compression solenoid valve 6131, a recovery compensation valve 6132, and a second compression damping channel 615.

[0062] The compression channel 614 of the compression solenoid valve 6131 is set in the oil line from the compression inlet 611 to the transition chamber 63; the compression damping is actively and precisely adjusted by changing the throttling degree through electromagnetic control.

[0063] The recovery compensation valve 6132 is installed on the oil line from the transition chamber 63 to the compression chamber 12. It is a one-way shut-off valve, which only allows oil to flow from the transition chamber 63 back to the compression chamber 12 in one direction. It is used to replenish oil to the compression chamber 12 during the recovery stroke and to prevent oil leakage from this path during the compression stroke.

[0064] The second compression damping channel 615 is connected in parallel with the compression channel 614 of the compression solenoid valve 6131; when the flow rate / pressure is high, the second compression damping channel 615 (usually containing a passive valve) opens, providing an additional flow path and limiting the maximum damping force.

[0065] The recovery control valve assembly 623 includes: a recovery solenoid valve 6231, a compression compensation valve 6232, and a second recovery damping channel 625.

[0066] The reset channel 624 of the reset solenoid valve 6231 is located on the oil line from the reset inlet 621 to the transition chamber 63.

[0067] The compression compensation valve 6232 is installed on the oil line from the transition chamber 63 to the intermediate chamber 41. It is a one-way shut-off valve, which only allows oil to flow from the transition chamber 63 to the intermediate chamber 41 in one direction. It is used to replenish oil to the intermediate chamber 41 during the compression stroke and prevent oil backflow during the recovery stroke.

[0068] The second recovery damping channel 625 is connected in parallel with the recovery channel 624 of the recovery solenoid valve 6231, and its principle is similar to that of the second compression damping channel 615.

[0069] Example 2

[0070] like Figure 1 and Figure 2 As shown, this embodiment describes the specific structure of the energy storage component 7.

[0071] The energy storage component 7 includes: an energy storage device 71, a first through hole 721, an energy storage channel 72, and a second through hole 722. Both the first through hole 721 and the second through hole 722 are disposed on the connection module 6.

[0072] The accumulator 71 is fixed on one side of the connecting module 6. One end of the energy storage channel 72 is connected to the transition chamber 63 through the first through hole 721, and the other end of the energy storage channel 72 is connected to the accumulator 71 through the second through hole 722. The energy storage channel 72 can be directly installed on the connecting module 6 or it can be an additional connecting pipeline.

[0073] The accumulator 71 includes an outer housing 711 and a floating piston 712. The floating piston 712 is disposed inside the outer housing 711 and divides the outer housing 711 into a compensation chamber 7111 and a gas chamber 7112. The compensation chamber 7111 is connected to the energy storage channel 72 through a second through hole 722. The gas chamber 7112 is sealed, and the floating piston 712 is slidably sealed to the inner side of the outer housing 711.

[0074] The compensation chamber 7111 is directly connected to the shock absorber's oil circuit and is connected to the energy storage channel 72 through the second through hole 722 on the accumulator 71. The compensation chamber 7111 is filled with oil. The gas chamber 7112 is a sealed chamber, usually pre-filled with an inert gas (such as nitrogen) at a certain pressure, and is a gas spring.

[0075] A sliding seal exists between the floating piston 712 and the inner side of the outer housing 711 in which it slides, ensuring that there is no leakage or mixing between the oil (in the compensation chamber 7111) and the gas (in the gas chamber 7112), while allowing the floating piston 712 to move freely according to the pressure difference on both sides.

[0076] When the system oil pressure increases, the oil enters the compensation chamber 7111 and pushes the floating piston 712 to compress the gas; when the system oil pressure decreases, the compressed gas pushes the floating piston 712 to push the oil back into the transition chamber 63. This not only compensates for the change in oil volume caused by the movement of the piston rod 2 and maintains the system pressure, but also ensures that the oil does not mix with the gas.

[0077] Example 3

[0078] This embodiment provides the specific working principle of the shock absorber during the compression and recovery strokes.

[0079] Compression oil circuit - Piston 3 moves close to connecting module 6.

[0080] The oil is squeezed and flows out from the compression chamber 12.

[0081] The oil passes through the isolation component 5 and enters the connection module 6 through the compression inlet 611.

[0082] After passing through the compression inlet 611, the oil is actively damped by the compression solenoid valve 6131. ​​At the same time, when flow rate compensation is required, a portion of the oil may pass through the second compression damping channel 615 connected in parallel. The oil eventually flows into the transition chamber 63.

[0083] After reaching the transition chamber 63, the oil has two main destinations:

[0084] Destination 1 (Accumulator 71): A portion of the oil enters the compensation chamber 7111 through the oil passage of accumulator 71 (including the first through hole 721, the energy storage channel 72, and the second through hole 722), pushing the floating piston 23 to compress the gas in the gas chamber 7112.

[0085] Destination 2 (compensation in intermediate chamber 41): Another part of the oil flows into intermediate chamber 41 through the recovery outlet 622 on the connecting module 6, pushes open the compression compensation valve 6232, and then flows into intermediate chamber 41 through the recovery inlet 621.

[0086] The original oil circuit is restored—piston 3 moves away from the connecting module 6.

[0087] The oil mainly flows out from the intermediate chamber 41.

[0088] The oil enters the connection module 6 through the restoration inlet 621.

[0089] The oil flows through the recovery channel 624 and is mainly controlled by the recovery solenoid valve 6231 for active damping. At the same time, when flow rate compensation is required, a portion of the oil may flow through the second recovery damping channel 625 connected in parallel. The oil eventually flows into the transition chamber 63.

[0090] The oil that reaches the transition chamber 63 merges with the oil that flows out of the compensation chamber 7111 of the accumulator 71 due to the pressure drop, and then pushes open the restoration compensation valve 6132, finally flowing into the compression chamber 12.

[0091] During compression: Compression chamber 12 → Compression inlet 611 → [Compression solenoid valve 6131 / / Second compression damping channel 615] → Transition chamber 63 → Accumulator 71;

[0092] Compression chamber 12 → Compression inlet 611 → [Compression solenoid valve 6131 / / Second compression damping channel 615] → Transition chamber 63 → Restoration outlet 622 → Compression compensation valve 6232 → Intermediate chamber 41.

[0093] During restoration: intermediate chamber 41 → restoration inlet 621 → [restoration solenoid valve 6231 / / second restoration damping channel 625] → transition chamber 63 → compression outlet 612 → restoration compensation valve 6132 → compression chamber 12.

[0094] Simultaneously, the accumulator 71 → transition chamber 63 → compression outlet 612 → restoration compensation valve 6132 → compression chamber 12.

[0095] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0096] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0097] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications can be made based on the above-described invention, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A variable damping dual-valve vibration damper, characterized in that, include: Inner cylinder (1); A piston rod (2) has a piston (3) connected to one end. The piston (3) is disposed in the inner cylinder (1) and divides the inner cylinder (1) into a recovery chamber (11) and a compression chamber (12). An outer cylinder (4) is fitted outside the inner cylinder (1) and forms an intermediate chamber (41) therebetween. The intermediate chamber (41) is connected to the recovery chamber (11) through a recovery through hole (13). The connecting module (6) is fixedly connected to one end of the outer cylinder (4) and is equipped with a recovery outlet (622) and a compression outlet (612) communicating with the transition chamber (63). An isolator (5) is disposed between the connecting module (6) and the inner cylinder (1), separating the compression chamber (12) and the intermediate chamber (41), and is provided with a compression inlet (611) communicating with the compression chamber (12) and a recovery inlet (621) communicating with the intermediate chamber (41); the flow channel between the compression inlet (611) and the compression outlet (612) is configured as a compression flow channel (61), and the flow channel between the recovery inlet (621) and the recovery outlet (622) is configured as a recovery flow channel (62). A compression control valve assembly (613) is disposed in the compression passage (61); A recovery control valve assembly (623) is disposed in the recovery flow channel (62); An energy storage component (7) is fixed to one side of the connecting module (6) and communicates with the transition chamber (63); The transition chamber (63) is a cavity located inside the connecting module (6), or a cavity jointly constructed by the connecting module (6) and the chassis connecting device (8).

2. The variable damping dual-valve vibration damper according to claim 1, characterized in that, The isolation member (5) is provided with an isolation through hole (51), which is connected to the compression inlet (611). The isolation member (5) is used to isolate the compression inlet (611) and the recovery inlet (621).

3. A variable damping dual-valve vibration damper according to claim 1, characterized in that, The compression control valve assembly (613) includes a compression solenoid valve (6131) and a recovery compensation valve (6132). The compression passage (614) of the compression solenoid valve (6131) is provided on the oil line from the compression inlet (611) to the transition chamber (63). The recovery compensation valve (6132) is provided on the oil line from the transition chamber (63) to the compression chamber (12). The recovery control valve assembly (623) includes a recovery solenoid valve (6231) and a compression compensation valve (6232). The recovery channel (624) of the recovery solenoid valve (6231) is provided on the oil line from the recovery inlet (621) to the transition chamber (63). The compression compensation valve (6232) is provided on the oil line from the transition chamber (63) to the intermediate chamber (41).

4. A variable damping dual-valve vibration damper according to claim 3, characterized in that, The recovery compensation valve (6132) and the compression compensation valve (6232) are one-way shut-off valves.

5. A variable damping dual-valve vibration damper according to claim 3, characterized in that, The compression control valve assembly (613) further includes a second compression damping channel (615), which is arranged in parallel with the compression channel (614) of the compression solenoid valve (6131); The recovery control valve assembly (623) further includes a second recovery damping channel (625), which is arranged in parallel with the recovery channel (624) of the recovery solenoid valve (6231).

6. A variable damping dual-valve vibration damper according to claim 1, characterized in that, The energy storage component (7) includes: an energy storage device (71), a first through hole (721), an energy storage channel (72), and a second through hole (722), wherein the first through hole (721) and the second through hole (722) are both disposed on the connection module (6); The energy storage device (71) is fixed to one side of the connection module (6). One end of the energy storage channel (72) is connected to the transition chamber (63) through the first through hole (721), and the other end of the energy storage channel (72) is connected to the energy storage device (71) through the second through hole (722).

7. A variable damping dual-valve vibration damper according to claim 6, characterized in that, The energy storage device (71) includes an outer housing (711) and a floating piston (712). The floating piston (712) is disposed inside the outer housing (711) and divides the outer housing (711) into a compensation chamber (7111) and a gas chamber (7112). The compensation chamber (7111) is connected to the energy storage channel (72) through the second through hole (722). The gas chamber (7112) is sealed, and the floating piston (712) slides and seals against the inner surface of the outer housing (711).

8. A variable damping dual-valve vibration damper according to claim 1, characterized in that, It also includes a guide (9), which is fixedly connected to the other end of the inner cylinder (1) and the outer cylinder (4), and the other end of the piston rod (2) passes through the guide (9) and contacts the outside.

9. A variable damping dual-valve vibration damper according to claim 1, characterized in that, The chassis connecting device (8) is fixedly connected to the connecting module (6).

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