A load-sensing adjustable shock absorber solenoid valve

Abstract

The application provides a load-adjustable shock absorber electromagnetic valve. The load-adjustable shock absorber electromagnetic valve comprises a shell having a containing cavity, and the shell assembly has a first mounting opening and a second mounting opening respectively communicating with the containing cavity; an adjusting piece, one end of the adjusting piece being located outside the shell, the other end of the adjusting piece extending into the containing cavity through the first mounting opening, and at least a part of the adjusting piece being movable relative to the shell to change the length extending into the containing cavity; an electromagnetic core, the electromagnetic core being arranged in the containing cavity, and the adjusting piece abutting against the electromagnetic core; a push rod, the push rod being arranged in the containing cavity, and the push rod abutting against one end of the electromagnetic core away from the adjusting piece; a piston, at least a part of the piston extending into the containing cavity through the second mounting opening; and one end of a first elastic piece abutting against one end of the push rod away from the electromagnetic core. The application solves the problem that the shock absorber electromagnetic valve in the prior art cannot adaptively adjust the adjustable damping range according to the sprung mass.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically, to a load-sensing adjustable shock absorber solenoid valve. Background Technology

[0002] In the field of vehicle shock absorber technology, traditional passive shock absorbers have limitations due to their fixed damping characteristics, which cannot be adjusted in real time according to the vehicle's driving state and load changes. Therefore, semi-active shock absorbers have been developed in recent years. They monitor the vehicle's dynamics in real time through an electronic control system and adjust the shock absorber damping through solenoid valves to adapt to different driving conditions. However, existing semi-active shock absorber solenoid valves have the following shortcomings: (1) Fixed damping adjustment range: When most semi-active shock absorber solenoid valves are designed, the damping adjustment range is preset under static conditions and cannot be dynamically adjusted according to changes in the actual vehicle load. This results in the damping characteristics of the shock absorber not being suitable for the current load conditions when the vehicle is lightly or heavily loaded, affecting comfort and handling performance; (2) Safety issues under electronic control system failure: When the electronic control system fails or malfunctions, existing semi-active shock absorber solenoid valves often cannot maintain sufficient damping characteristics, resulting in the shock absorber damping becoming too small. This may seriously reduce the stability and safety of the vehicle under high-speed driving or complex road conditions.

[0003] Therefore, existing technologies suffer from poor performance of solenoid valves used in vibration dampers. Summary of the Invention

[0004] The main objective of this invention is to provide a load-adjustable damper solenoid valve to solve the problem in the prior art that damper solenoid valves cannot adaptively adjust the adjustable damping range according to changes in sprung mass.

[0005] To achieve the above objectives, according to one aspect of the present invention, a load-adjustable vibration damper solenoid valve is provided, comprising: a housing having a receiving cavity, and the housing assembly having a first mounting opening and a second mounting opening respectively communicating with the receiving cavity; an adjusting member, one end of which is located outside the housing, the other end of which extends into the receiving cavity through the first mounting opening, and at least a portion of which is movable relative to the housing to change the length extending into the receiving cavity; an electromagnet core disposed within the receiving cavity, and the adjusting member abutting against the electromagnet core; a push rod disposed within the receiving cavity, and the push rod abutting against the end of the electromagnet core away from the adjusting member; a piston, at least a portion of which extends into the receiving cavity through the second mounting opening; a first elastic member, one end of which abuts against the end of the push rod away from the electromagnet core, and the other end of which abuts against the piston; a second elastic member, one end of which abuts against the end of the piston away from the first elastic member, and the other end of which abuts against an end cap, the tail end of which cooperates with a relief groove in the end cap for positioning.

[0006] Furthermore, the load-adjustable damper solenoid valve also includes a transmission assembly, which is disposed within the receiving cavity, and the adjusting element abuts against the electromagnet core through the transmission assembly.

[0007] Furthermore, the transmission assembly includes: a push block that abuts against the electromagnet core; and a sealing diaphragm disposed between the push block and the adjusting member.

[0008] Furthermore, the adjusting component includes an adjusting screw, one end of which extends into the receiving cavity through the first mounting opening and abuts against the transmission assembly, and the other end of which is located outside the housing.

[0009] Furthermore, the adjusting component also includes an adjusting nut, which is fitted onto the adjusting screw and threadedly engages with the adjusting screw.

[0010] Furthermore, the adjusting screw has an internal air passage, the portion of the adjusting screw located outside the housing has a first communication port that communicates with the air passage, and the end of the adjusting screw that abuts against the transmission assembly has a second communication port that communicates with the air passage.

[0011] Furthermore, the load-adjustable damper solenoid valve also includes a vent pipe. The portion of the adjusting screw located outside the housing has a connecting end with a first connecting port. One end of the vent pipe is connected to the connecting end and communicates with the air passage through the first connecting port. The other end of the vent pipe is connected to an air spring or a constant air pressure source.

[0012] Furthermore, the push block and / or push rod have a positioning structure that cooperates with the electromagnet core.

[0013] Furthermore, the push rod is T-shaped and includes a large-diameter section and a small-diameter section that are connected to each other. The small-diameter section abuts against the electromagnet core, and the large-diameter section abuts against the first elastic element.

[0014] Furthermore, the end of the push rod that abuts against the first elastic element has at least one oil passage hole.

[0015] Applying the technical solution of this invention, a load-sensing adjustable vibration damper solenoid valve of this application includes a housing, an adjusting member, an electromagnet core, a push rod, a piston, a first elastic member, and a second elastic member. The housing has a receiving cavity, and the housing assembly has a first mounting opening and a second mounting opening respectively communicating with the receiving cavity; one end of the adjusting member is located outside the housing, and the other end of the adjusting member extends into the receiving cavity through the first mounting opening, and at least a portion of the adjusting member can move relative to the housing to change the length extending into the receiving cavity; the electromagnet core is disposed in the receiving cavity, and the adjusting member abuts against the electromagnet core; the push rod is disposed in the receiving cavity, and the push rod abuts against the end of the electromagnet core away from the adjusting member; at least a portion of the piston extends into the receiving cavity through the second mounting opening; one end of the first elastic member abuts against the end of the push rod away from the electromagnet core, and the other end of the first elastic member abuts against the piston; one end of the second elastic member abuts against the end of the piston away from the first elastic member, and the other end of the second elastic member abuts against the end cap, and the tail end of the second elastic member cooperates with the relief groove in the end cap to play a positioning role.

[0016] When using the load-adjustable damper solenoid valve of this application, the solenoid valve can adjust the force between the electromagnet core and the push rod by changing the length of the adjusting member extending into the receiving cavity and interacting with the electromagnet core. This changes the force of the push rod on the first elastic member, thereby effectively adjusting the preload of the first elastic member and achieving precise control of the piston opening pressure. On the other hand, the change in the length of the adjusting member extending into the receiving cavity also changes the effective fluid area from the receiving cavity to the pilot valve cavity, thereby adjusting the pressure in the receiving cavity and achieving precise adjustment of the piston opening pressure. This control mechanism expands the range of damping adjustment and solves the problem of limited damping adjustment range of damper solenoid valves in the prior art. The second elastic member can effectively adjust the opening pressure of the main valve by partially offsetting the preload of the first elastic member. In addition, the introduction of the second elastic member also effectively reduces the vibration problem of the main valve piston. More importantly, even in the event of electronic control system failure, the mechanical contact between the adjusting component and the electromagnet core maintains a certain preload of the first elastic element, ensuring the piston's opening pressure under high load conditions. This prevents the damper from becoming too weak and ensures vehicle safety under various operating conditions. Therefore, the load-sensing adjustable damper solenoid valve in this application effectively solves the problem in the prior art where damper solenoid valves cannot adaptively adjust the adjustable damping range based on changes in sprung mass. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1This illustration shows a structural schematic diagram of a load-sensitive adjustable vibration damper solenoid valve according to a specific embodiment of this application;

[0019] Figure 2 It shows Figure 1 A cross-sectional view of a load-sensing adjustable vibration damper solenoid valve.

[0020] Figure 3 It shows Figure 1 A schematic diagram of the adjusting screw of a load-sensing adjustable vibration damper solenoid valve;

[0021] Figure 4 It shows Figure 1 A schematic diagram of the push rod of a load-sensing adjustable vibration damper solenoid valve.

[0022] The above figures include the following reference numerals:

[0023] 10. Housing; 11. Receiving cavity; 12. First mounting opening; 13. Second mounting opening; 14. End cap; 20. Adjusting component; 21. Adjusting screw; 211. Air passage; 212. First connecting port; 213. Second connecting port; 214. Connecting end; 22. Adjusting nut; 30. Electromagnetic core; 40. Push rod; 41. Large diameter section; 42. Small diameter section; 43. Oil passage hole; 50. Piston; 60. First elastic element; 70. Transmission assembly; 71. Push block; 72. Sealing diaphragm; 80. Second elastic element. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0027] To address the issue of poor performance of existing damper solenoid valves, this application provides a load-adjustable damper solenoid valve.

[0028] like Figures 1 to 4As shown, a load-adjustable vibration damper solenoid valve according to this application includes a housing 10, an adjusting member 20, an electromagnet core 30, a push rod 40, a piston 50, a first elastic member 60, and a second elastic member 80. The housing 10 has a receiving cavity 11, and the housing 10 assembly has a first mounting opening 12 and a second mounting opening 13 respectively communicating with the receiving cavity 11; one end of the adjusting member 20 is located outside the housing 10, and the other end of the adjusting member 20 extends into the receiving cavity 11 through the first mounting opening 12, and at least a portion of the adjusting member 20 is movable relative to the housing 10 to change the length extending into the receiving cavity 11; the electromagnet core 30 is disposed within the receiving cavity 11, and the adjusting member 20 abuts against the electromagnet core 30; the push rod 40 is disposed within the receiving cavity 11. Furthermore, the push rod 40 abuts against the end of the electromagnet core 30 away from the adjusting member 20; at least a portion of the piston 50 extends into the receiving cavity 11 through the second mounting opening 13; one end of the first elastic member 60 abuts against the end of the push rod 40 away from the electromagnet core 30, and the other end of the first elastic member 60 abuts against the piston 50; one end of the second elastic member 80 abuts against the end of the piston 50 away from the first elastic member 60, and the other end of the second elastic member 80 abuts against the end cover 14; the tail end of the second elastic member 80 cooperates with the unloading groove in the end cover 14 to play a positioning role.

[0029] When using the load-adjustable damper solenoid valve of this application, the load-adjustable damper solenoid valve can adjust the force between the electromagnet core 30 and the push rod 40 by changing the length of the adjusting member 20 extending into the receiving cavity 11 and interacting with the electromagnet core 30. This changes the force of the push rod 40 on the first elastic member 60, thereby effectively adjusting the preload of the first elastic member 60 and achieving precise control of the opening pressure of the piston 50. On the other hand, the change in the length of the adjusting member 20 extending into the receiving cavity 11 also changes the effective fluid area from the receiving cavity 11 to the pilot valve cavity, thereby adjusting the pressure of the receiving cavity 11 and achieving precise adjustment of the opening pressure of the piston 50. This control mechanism expands the range of damping adjustment and solves the problem of limited damping adjustment range in the prior art. The second elastic member 80 can effectively adjust the opening pressure of the main valve by partially offsetting the preload of the first elastic member 60. In addition, the introduction of the second elastic member 80 also effectively reduces the vibration problem of the main valve piston. More importantly, even in the event of electronic control system failure, the mechanical contact between the adjusting element 20 and the electromagnet core 30 maintains a certain preload on the first elastic element 60, ensuring the opening pressure of the piston 50 under high load conditions. This prevents the damper from becoming too weak and ensures vehicle safety under different operating conditions. Therefore, the load-sensing adjustable damper solenoid valve of this application effectively solves the problem in the prior art that damper solenoid valves cannot adaptively adjust the adjustable damping range according to changes in sprung mass.

[0030] Furthermore, in this application, the first elastic element 60 can be a main valve piston spring, and the second elastic element 80 can be a main valve piston auxiliary spring. Meanwhile, the end cap 14 can be disposed at the second mounting opening 13.

[0031] In this application, the adjusting member 20 can seal the first mounting opening 12, and the piston 50 can seal the second mounting opening 13. Other structures can also be chosen to seal the first mounting opening 12 and the second mounting opening 13 separately. Of course, in this application, the first and second mounting openings may not be completely sealed.

[0032] Specifically, a load-adjustable vibration damper solenoid valve further includes a transmission assembly 70, which is disposed within the receiving cavity 11, and the adjusting member 20 abuts against the electromagnet core 30 via the transmission assembly 70. In this embodiment, the load-adjustable vibration damper solenoid valve is equipped with a transmission assembly 70, which is disposed within the receiving cavity 11, and the adjusting member 20 abuts against the electromagnet core 30 via the transmission assembly 70. That is to say, in this embodiment, the adjusting member 20 actually abuts against the transmission assembly 70, thereby the adjusting member 20 transmits force to the electromagnet core 30 through the transmission assembly 70. In other words, this structure allows the movement of the adjusting member 20 into or out of the receiving cavity 11 to be efficiently converted into an axial force on the electromagnet core 30 through the transmission assembly 70, thereby more precisely controlling the displacement of the electromagnet core 30, and thus affecting the degree of compression of the first elastic member 60 by the push rod 40. The introduction of the transmission assembly 70 not only improves the system's response speed and adjustment accuracy, but also enhances the robustness of the entire solenoid valve, ensuring the stability of the main valve piston 50's movement even under harsh operating conditions and maintaining the damping characteristics of the shock absorber.

[0033] In one specific embodiment of this application, the transmission assembly 70 includes a push block 71 and a sealing diaphragm 72. The push block 71 abuts against the electromagnet core 30; the sealing diaphragm 72 is disposed between the push block 71 and the adjusting member 20. In this embodiment, this structural design allows the operation of the adjusting member 20 to be converted into a driving force on the push block 71 through the sealing diaphragm 72, thereby affecting the movement of the electromagnet core 30. When the adjusting screw 21 of the adjusting member 20 is screwed in or out, its action directly acts on the sealing diaphragm 72, and the push block 71 contacts the electromagnet core 30 under the push of the sealing diaphragm 72, causing the electromagnet core 30 to displace. The displacement of the electromagnet core 30 is transmitted to the main valve spring through the push rod 40, further affecting the opening pressure of the main valve piston 50, thereby adjusting the damping range of the shock absorber. This transmission mechanism not only realizes the manual adjustment function, but also automatically adjusts the damping characteristics according to the input of external air pressure, ensuring that the shock absorber can still maintain a certain damping performance in the event of failure of the electronic control system, thus ensuring driving safety.

[0034] Optionally, the contact portion between the pusher 71 and the sealing diaphragm 72 should be smooth and without sharp edges to improve the lifespan of the sealing diaphragm 72. Of course, in this application, one end of the pusher 71 can also pass through the sealing diaphragm 72 and contact the adjusting member 20.

[0035] Specifically, the adjusting component 20 includes an adjusting screw 21. One end of the adjusting screw 21 extends into the receiving cavity 11 through the first mounting opening 12 and abuts against the transmission assembly 70, while the other end of the adjusting screw 21 is located outside the housing 10. In this embodiment, the design allows a user or system to control the damping characteristics of the solenoid valve by adjusting the screw 21. When the adjusting screw 21 is screwed in, it directly compresses the sealing diaphragm 72, increasing its force on the push block 71. The push block 71 then pushes the electromagnet core 30 to compress the push rod 40, thereby increasing the preload of the main valve spring. This results in the main valve piston 50 requiring greater electromagnetic force to open, thus increasing the upper and lower limits of the damper's damping adjustment. Conversely, when the adjusting screw 21 is screwed out, the pressure on the sealing diaphragm 72 decreases, the preload of the main valve spring also decreases, and the damping adjustment range of the damper decreases accordingly. If the adjusting screw 21 is connected to the air pipe in series with the air spring or pressure reducing valve, the pressure on the sealing diaphragm 72 will change accordingly with the change in air pressure inside the air pipe, thus affecting the position of the push block 71, changing the compression degree of the main valve spring, and ultimately achieving automatic adjustment of the damping range. This design not only provides the flexibility of manually adjusting the damping range, but also realizes the ability to automatically adjust the damper damping according to the vehicle load, ensuring that the damper can still maintain certain damping characteristics in the event of electronic control system failure, thus ensuring driving safety.

[0036] Specifically, the adjusting component 20 also includes an adjusting nut 22, which is sleeved on and threadedly engaged with the adjusting screw 21. In this embodiment, the adjusting component 20 includes an adjusting nut 22 and an adjusting screw 21, with the adjusting nut 22 sleeved on and threadedly engaged with the adjusting screw 21. By rotating the adjusting nut 22, the length of the adjusting screw 21 extending into the receiving cavity 11 can be adjusted, thereby changing its pressure on the sealing diaphragm 72. This design provides a way to manually adjust the preload of the main valve spring, allowing the opening pressure of the solenoid valve main valve and the damping range of the shock absorber to be directly controlled.

[0037] Specifically, the adjusting screw 21 has an internal air passage 211. The portion of the adjusting screw 21 located outside the housing 10 has a first connecting port 212 communicating with the air passage 211, and the end of the adjusting screw 21 that abuts against the transmission assembly 70 has a second connecting port 213 communicating with the air passage 211. In this embodiment, the adjusting screw 21 has an internal air passage 211, with a first connecting port 212 and a second connecting port 213 at both ends. The first connecting port 212 is located outside the housing 10 of the adjusting screw 21, while the second connecting port 213 abuts against the transmission assembly 70. This design allows air pressure from an external air source to enter the internal air passage 211 of the adjusting screw 21 through the first connecting port 212, and then act on the transmission assembly 70 through the second connecting port 213, thereby affecting the preload of the main valve spring. This construction of the adjusting screw 21 allows the solenoid valve to automatically adjust the opening pressure of the main valve according to changes in external air pressure, thus achieving adaptive adjustment of the damper damping under different load conditions. In practical applications, when the vehicle load changes, the air pressure on the sealing diaphragm 72 changes accordingly through connection with an air spring or a constant air pressure source. This, in turn, adjusts the pushing force of the pusher block 71 on the electromagnet core 30, ultimately altering the opening pressure of the main valve piston 50. This ensures the shock absorber provides appropriate damping under various operating conditions, effectively improving vehicle stability and safety. Furthermore, even if the electronic control system fails, the constant air pressure source can still transmit a certain preload to the main valve spring via the adjusting screw 21, ensuring the shock absorber does not completely lose its damping function and maintaining the vehicle's basic driving performance.

[0038] Optionally, a load-adjustable damper solenoid valve further includes a vent pipe. The portion of the adjusting screw 21 located outside the housing 10 has a connecting end 214, which has a first connecting port 212. One end of the vent pipe is connected to the connecting end 214 and communicates with the air passage 211 through the first connecting port 212. The other end of the vent pipe is connected to an air spring or a constant air pressure source. In this application, this design allows the adjusting screw 21 to be adjusted not only manually but also automatically according to changes in external air pressure, enhancing the adaptability and safety of the damper. Under normal operating conditions, the electromagnetic force of the electromagnet core 30 combines with the air pressure from the air spring or constant air pressure source to act on the push block 71, thereby affecting the preload of the main valve spring and adjusting the opening pressure of the main valve piston 50, thus achieving flexible adjustment of the damper's damping range. Especially in the event of electronic control system failure, the constant air pressure provided by the air pressure source ensures that the main valve of the solenoid valve has a certain opening pressure, even without the action of electromagnetic force. This ensures that the shock absorber does not deteriorate vehicle handling due to insufficient damping, thus guaranteeing driving safety. This method of adjusting damping through air pressure allows the shock absorber to automatically match the most suitable damping adjustment range when the vehicle load changes, improving driving comfort and driving stability.

[0039] In this application, the vent pipe can be a flexible vent hose. The other end of the adjusting screw 21 is connected to the flexible vent hose, through which the pressure of the air spring chamber can be transmitted to the sealing diaphragm 72. When the pressure in the air passage 211 of the adjusting screw 21 changes, the force on the sealing diaphragm 72 also changes accordingly, further affecting the drive of the push block 71 on the electromagnet core 30, and ultimately adjusting the opening pressure of the main valve piston 50 to achieve dynamic matching of the damper's adjustable damping range. This structure can not only automatically adjust the damping characteristics of the shock absorber according to the changes in the vehicle's sprung mass, ensuring that the vehicle can obtain a suitable damping effect under different loads, but also maintain a certain damping characteristic of the shock absorber through a preset air pressure source when the electronic control system fails, thereby ensuring driving safety.

[0040] Optionally, the push block 71 and / or the push rod 40 have a mutually cooperating positioning structure with the electromagnet core 30. This arrangement effectively ensures the stability of the contact between the push block 71 and the electromagnet core 30, and between the push rod 40 and the electromagnet core 30. Furthermore, in this application, the push block 71 and the electromagnet core 30, and the push rod 40 and the electromagnet core 30, can be connected by a threaded connection. Of course, in this application, the positioning structure can also be a mutually cooperating positioning boss and positioning groove.

[0041] Optionally, the push rod 40 is T-shaped and includes a large-diameter section 41 and a small-diameter section 42 connected to each other. The small-diameter section 42 abuts against the electromagnet core 30, and the large-diameter section 41 abuts against the first elastic element 60. This arrangement ensures that the force on the first elastic element 60 is more stable, thereby ensuring that the first elastic element 60 can be pressed in a preset direction and preventing the first elastic element 60 from deflecting.

[0042] Optionally, the end of the push rod 40 that abuts against the first elastic element 60 has at least one oil passage hole 43. This arrangement effectively ensures that lubricating oil can enter other parts of the load-adjustable damper solenoid valve through the oil passage hole 43, thereby lubricating other structures within the load-adjustable damper solenoid valve.

[0043] In one specific embodiment of this application, the working process of a load-adjustable damper solenoid valve is as follows: First, the adjusting nut 22 is manually rotated, which causes a change in the insertion length of the adjusting screw 21 within the receiving cavity 11. The other end of the adjusting screw 21 contacts the sealing diaphragm 72, and its movement directly or indirectly changes the pressure on the sealing diaphragm 72. The deformation of the sealing diaphragm 72 causes the push block 71 to displace, and the push block 71 contacts the electromagnet core 30, thereby pushing the electromagnet core 30 to move. The movement of the electromagnet core 30 is transmitted to the main valve spring through the T-shaped push rod 40. The special shape of the T-shaped push rod 40 ensures smooth force transmission. The compressive force on the main valve spring changes accordingly, and this change ultimately affects the main valve piston 50, controlling its opening pressure. When the electromagnet core 30 is subjected to electromagnetic force, combined with preset air pressure or manual adjustment, the preload of the main valve spring can be controlled more precisely, thereby adjusting the damping characteristics of the damper. In the event of a failure in the electronic control system, the adjusting screw 21, connected to a constant air pressure source, can still transmit a certain preload to the main valve spring. This ensures that the solenoid valve main valve maintains a high opening pressure even in the failure state, preventing the shock absorber damping from becoming too low and effectively ensuring driving safety. Furthermore, through a vent pipe connected to an air spring or a constant air pressure source, air pressure changes can directly affect the sealing diaphragm 72, further influencing the preload of the main valve spring. This allows for dynamic adjustment of the shock absorber's damping characteristics, ensuring vehicle stability and safety under different load conditions.

[0044] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects: The load-sensing adjustable shock absorber solenoid valve proposed in this invention allows for precise control of the main valve spring preload by manually or pneumatically adjusting the position of the adjusting screw 21, thereby effectively adjusting the damping range of the shock absorber. The manual adjustment mechanism allows users to flexibly adjust the working state of the shock absorber according to actual needs, while the pneumatic adjustment mechanism can automatically adapt to changes in vehicle load and optimize the damping effect. In the event of electronic control system failure, the basic function of the shock absorber can still be maintained through a preset air pressure source, avoiding driving safety hazards caused by insufficient damping and significantly improving vehicle driving safety and comfort. In addition, the T-shaped push rod 40 design not only enhances structural stability but also ensures normal oil flow, further improving the reliability and service life of the solenoid valve.

[0045] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0046] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0047] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A load-sensing adjustable vibration damper solenoid valve, characterized in that, include: The housing (10) has a receiving cavity (11), and the housing (10) assembly has a first mounting opening (12) and a second mounting opening (13) respectively communicating with the receiving cavity (11). An adjusting member (20) has one end located outside the housing (10) and the other end extending into the receiving cavity (11) through the first mounting opening (12). At least a portion of the adjusting member (20) is movable relative to the housing (10) to change the length extending into the receiving cavity (11). An electromagnet core (30) is disposed in the receiving cavity (11), and the adjusting member (20) abuts against the electromagnet core (30); Push rod (40), the push rod (40) is disposed in the receiving cavity (11), and the push rod (40) abuts against the end of the electromagnet core (30) away from the adjusting member (20); A piston (50), at least a portion of which extends into the receiving cavity (11) through the second mounting opening (13); The first elastic element (60) has one end abutting against the end of the push rod (40) away from the electromagnet core (30), and the other end of the first elastic element (60) abutting against the piston (50). The second elastic element (80) has one end abutting against the end of the piston (50) away from the first elastic element (60), and the other end of the second elastic element (80) abutting against the end cap (14). The tail end of the second elastic element (80) cooperates with the retraction groove in the end cap (14) to play a positioning role.

2. The load-adjustable vibration damper solenoid valve according to claim 1, characterized in that, The load-adjustable damper solenoid valve further includes a transmission assembly (70), which is disposed in the receiving cavity (11), and the adjusting member (20) abuts against the electromagnet core (30) through the transmission assembly (70).

3. The load-adjustable vibration damper solenoid valve according to claim 2, characterized in that, The transmission assembly (70) includes: Push block (71), which abuts against the electromagnet core (30); A sealing diaphragm (72) is disposed between the push block (71) and the adjusting member (20).

4. The load-adjustable vibration damper solenoid valve according to claim 3, characterized in that, The adjusting member (20) includes: An adjusting screw (21) is provided, one end of which extends into the receiving cavity (11) through the first mounting opening (12) and abuts against the transmission assembly (70), while the other end of the adjusting screw (21) is located outside the housing (10).

5. The load-sensing adjustable vibration damper solenoid valve according to claim 4, characterized in that, The adjusting member (20) further includes: Adjusting nut (22), which is sleeved on the adjusting screw (21) and threadedly engaged with the adjusting screw (21).

6. The load-adjustable vibration damper solenoid valve according to claim 4, characterized in that, The adjusting screw (21) has an internal air passage (211), and the portion of the adjusting screw (21) located outside the housing (10) has a first communication port (212) communicating with the air passage (211). The end of the adjusting screw (21) that abuts against the transmission assembly (70) has a second communication port (213) communicating with the air passage (211).

7. The load-adjustable vibration damper solenoid valve according to claim 6, characterized in that, The load-sensing adjustable vibration damper solenoid valve also includes a vent pipe. The portion of the adjusting screw (21) located outside the housing (10) has a connecting end (214). The connecting end (214) has a first connecting port (212). One end of the vent pipe is connected to the connecting end (214) and communicates with the air passage (211) through the first connecting port (212). The other end of the vent pipe is connected to an air spring or a constant air pressure source.

8. The load-adjustable vibration damper solenoid valve according to claim 3, characterized in that, The push block (71) and / or the push rod (40) have a positioning structure that cooperates with the electromagnet core (30).

9. A load-adjustable vibration damper solenoid valve according to any one of claims 1 to 8, characterized in that, The push rod (40) is T-shaped and includes a large-diameter section (41) and a small-diameter section (42) connected to each other. The small-diameter section (42) abuts against the electromagnet core (30), and the large-diameter section (41) abuts against the first elastic element (60).

10. A load-sensing adjustable vibration damper solenoid valve according to any one of claims 1 to 8, characterized in that, The push rod (40) has at least one oil passage hole (43) at the end that abuts against the first elastic member (60).

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