Valve assemblies, valve devices, vibration damping systems, and vehicles

Abstract

This application provides a valve assembly, valve device, vibration damping system, and vehicle, relating to the field of vehicle technology, and aims to solve the problem of reducing system pressure overshoot and vibration during valve opening. The valve assembly includes a valve seat, a valve plug, and a valve body. The valve seat has a valve hole and includes a first limiting portion. The valve plug is opposite to the valve hole. At least a portion of the valve body is disposed on the side of the valve plug opposite to the valve hole, and the valve plug is movably connected to the valve body. The valve body includes a second limiting portion. The valve body has an open valve hole position and a closed valve hole position. When the valve body is in the open valve hole position, the second limiting portion and the first limiting portion are spaced apart. When the valve body is in the closed valve hole position, the second limiting portion and the first limiting portion are in contact, and the valve plug has a certain amount of axial movement relative to the valve body along the valve hole.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a valve assembly, valve device, vibration damping system, and vehicle. Background Technology

[0002] As vehicle technology advances, users' demands for vehicles are gradually increasing. In order to balance vehicle handling and comfort, vehicles can be equipped with suspension systems that have active adjustment functions.

[0003] The suspension system may include a damping system, in which fluid flows through two chambers to provide damping to the suspension system. The two chambers are connected by a valve, and the damping of the damping system can be adjusted by controlling the opening pressure of the valve.

[0004] When the pressure is high at the moment the valve is opened, it can easily cause overshoot and fluctuation in system pressure. Summary of the Invention

[0005] The purpose of this application is to provide a valve assembly, valve device, vibration damping system, and vehicle, which aims to solve the problem of reducing system pressure overshoot and vibration at the moment of valve opening.

[0006] In a first aspect, this application provides a valve assembly, which includes a valve seat, a valve plug, and a valve body. The valve seat has a valve hole and includes a first limiting portion. The valve plug is opposite to the valve hole. At least a portion of the valve body is disposed on the side of the valve plug opposite to the valve hole, and the valve plug is movably connected to the valve body. The valve body includes a second limiting portion. The valve body has an open valve hole position and a closed valve hole position. When the valve body is in the open valve hole position, the second limiting portion and the first limiting portion are spaced apart. When the valve body is in the closed valve hole position, the second limiting portion and the first limiting portion are in contact, and the valve plug has a movable allowance relative to the valve body along the axial direction of the valve hole.

[0007] In this embodiment, when the valve body is in the position of blocking the valve hole, that is, when the valve assembly is closed, the driving force of closing the valve drives the valve body to approach the valve seat. The part of the valve body on the side of the valve plug opposite to the valve hole drives the valve plug to block the valve hole. Since the second limiting part is in contact with the first limiting part, a pre-pressure can be applied to the valve seat. At this time, at least part of the pressure borne by the valve body can act on the valve seat.

[0008] Because the valve plug has a certain amount of axial movement relative to the valve body along the valve orifice, it can be unpressured or only bear partial pressure. This allows the valve plug to retain this axial movement while sealing the valve orifice. When the hydraulic fluid overcomes the pressure to open the valve, it does not need to overcome the full pressure borne by the valve body. Pre-opening of the valve assembly is achieved simply by pushing the valve plug to the compressed position, moving it away from the valve orifice, thus connecting the second and third chambers. At this point, the hydraulic pressure required to open the valve assembly is less than the full pressure borne by the valve body. Compared to related technologies, the opening pressure is lower, reducing the impact force of the hydraulic fluid on the valve plug at the moment of opening the valve against the driving force, thereby reducing system pressure overshoot and jitter at the moment of valve opening.

[0009] Optionally, the valve assembly also includes an elastic element disposed between the valve body and the valve plug; when the valve body is in the position of blocking the valve orifice, the elastic element is in a free state or a partially compressed state, so that the valve plug has a certain amount of movement relative to the valve body along the axial direction of the valve orifice.

[0010] Optionally, when the valve body is in the position of blocking the valve orifice, the elastic element is in a free state, and there is contact between the elastic element and the valve body, as well as between the elastic element and the valve plug.

[0011] Optionally, when the valve body is in the position of blocking the valve orifice, the elastic element is in a free state, and the elastic element is spaced apart from the valve body and / or from the valve plug.

[0012] Optionally, when the valve body is in the position of blocking the valve orifice, the elastic element is in a partially compressed state, and there is contact between the elastic element and the valve body, as well as between the elastic element and the valve plug.

[0013] Optionally, the stiffness of the valve plug is greater than the stiffness of the elastic element.

[0014] Optionally, the elastic element is a spring.

[0015] Optionally, the elastic element is annular, and the valve hole along the axial direction of the valve hole is located within the area surrounded by the elastic element in the projection of the elastic element.

[0016] Optionally, the elastic element extends in a wavy shape along its circumference.

[0017] Optionally, when the valve body is in the open valve port position, there is a first gap δ between the second limiting part and the first limiting part, and there is a second gap s0 between the elastic element and the valve body, and / or between the elastic element and the valve plug; the size of the first gap δ is greater than the size of the second gap s0, or the size of the first gap δ is equal to the size of the second gap s0, or the size of the first gap δ is less than the size of the second gap s0.

[0018] Optionally, the valve assembly may also include an actuation assembly for driving the valve body to switch between an open valve orifice position and a closed valve orifice position.

[0019] Optionally, the drive assembly also includes a resilient reset element, which is used to apply a resilient reset force to the valve body when the coil structure is de-energized.

[0020] Optionally, the valve body also has an open valve port position. When the valve body is in the open valve port position, there is a first gap δ between the valve body and the valve seat, and a second gap s0 between the elastic element and the valve body, and / or between the elastic element and the valve plug; the dimensions of the first gap δ and the second gap s0 satisfy the following: ; in, The driving force applied to the valve body when the drive assembly switches the valve body from the open valve port position to the closed valve port position. k is the stiffness of the elastic reset component, k bp This refers to the stiffness of the elastic element.

[0021] Optionally, the valve body includes a top wall portion located on the side of the valve plug opposite to the valve hole.

[0022] Optionally, the first limiting portion is located on the periphery of the valve hole; and / or, the valve body further includes a side frame portion disposed on the top wall portion facing the valve seat and surrounding the top wall portion, the side frame portion forming the second limiting portion.

[0023] Optionally, when the valve body is in the position of blocking the valve orifice, the valve body and the valve seat enclose a receiving cavity, and the valve plug is located in the receiving cavity.

[0024] Optionally, the valve body and / or valve seat are provided with a communication hole, one end of which is connected to the receiving cavity and the other end is connected to the outlet of the valve assembly or forms the outlet of the valve assembly.

[0025] Secondly, this application also provides a valve device, which includes the valve assembly provided in any embodiment of the first aspect.

[0026] Thirdly, this application also provides a vibration damping system, which includes a valve assembly provided in any embodiment of the first aspect and / or a valve device provided in any embodiment of the second aspect.

[0027] Fourthly, this application also provides a vehicle, which includes a valve assembly provided in any embodiment of the first aspect and / or a valve device provided in any embodiment of the second aspect, and / or a vibration damping system provided in any embodiment of the third aspect.

[0028] It should be noted that the technical effects brought about by the implementation methods of the second to fourth aspects can all be referred to the technical effects brought about by the corresponding implementation methods in the first aspect, and will not be repeated here. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the structure of a vehicle provided in this application embodiment; Figure 2 This is a schematic diagram of the structure of a valve device provided in an embodiment of this application; Figure 3 for Figure 2 The diagram shows a flow path of a valve device. Figure 4 This is a schematic diagram of the structure of a valve assembly provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of an elastic element provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of a valve plug provided in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of a valve body provided in an embodiment of this application; Figure 8 for Figure 7 The image shown is a cross-sectional view of a valve body. Figure 9 A flow-pressure characteristic diagram of a valve device provided in an embodiment of this application; Figure 10 This is a diagram illustrating the dynamometer characteristics of a valve device provided in an embodiment of this application.

[0031] Figure label: 1000, Vehicle; 100, Body; 200, Wheel; 300, Vibration damping system; 10, Valve device; 1. Valve assembly; 11. Valve seat; 111. Valve orifice; 12. Valve plug; 13. Valve body; 131. Receiving cavity; 1311. Top wall; 1312. Side frame; 132. Communicating hole; 14. Elastic element; 2. Drive assembly; 21. Magnet structure; 22. Coil structure; 23. Elastic reset component; 24. Coil frame; 25. Magnetic shielding ring; 26. Core cover; 27. Fixed core; 28. Guide sleeve; 31. Overflow valve seat; 32. Overflow valve core; 321. Connecting flow channel; 322. Overflow valve side hole; 33. Overflow valve spring; 34. Opening ring; 41. One-way valve seat; 42. One-way valve disc; 43. One-way valve spring; 51. Solenoid valve body; 52. Locking cover; 53. Solenoid valve housing; 54. Connector; 55. Sealing ring; 01. First chamber; 02. Second chamber; 03. Third chamber; 04. Fourth chamber. Detailed Implementation

[0032] In the embodiments of this application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.

[0033] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0034] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0035] In the embodiments of this application, "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, where the range of similarity is within an acceptable deviation range, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where the acceptable deviation range for approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range for approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, where the acceptable deviation range for approximate equality can be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0036] This application provides a vehicle that can be a hybrid vehicle, a range-extended electric vehicle, a plug-in hybrid vehicle, a pure electric vehicle, etc. The vehicle can also be an engineering vehicle, a special-purpose vehicle, etc.

[0037] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 provided in an embodiment of this application. The vehicle 1000 may include a body 100 and wheels 200. The body 100 is used for passengers to ride in and for carrying goods. The wheels 200 are installed under the body 100 to support the body 100 and are able to roll on the road surface so that the vehicle 1000 can move.

[0038] In some embodiments, the vehicle may include a suspension system connected between the vehicle body and the wheels to buffer the impact force transmitted to the vehicle body 10 from uneven road surfaces, thereby ensuring the smoothness of the vehicle 100's ride and improving the driving comfort of the vehicle 100.

[0039] In some embodiments, the suspension system may include a damping system 300, which may include a piston cylinder and a piston rod that move relative to each other. A piston is fixedly connected to the lower end of the piston rod, and the piston is housed inside the piston cylinder and is capable of moving up and down along the inner wall of the piston cylinder. The piston cylinder is filled with hydraulic oil, and the piston divides the working chamber of the piston cylinder into an upper chamber and a lower chamber, which are connected by a connecting channel.

[0040] One of the piston cylinder and piston rod is connected to the vehicle body 100, and the other is connected to the wheel 200. When there is relative movement between the vehicle body 100 and the wheel 200, the piston can be driven to move up and down inside the piston cylinder. The hydraulic oil inside the piston cylinder can flow from one of the upper chamber and the lower chamber into the other, converting the mechanical energy generated by the vibration of the vehicle 1000 into the heat energy of the hydraulic oil and dissipating it into the atmosphere, thereby achieving the vibration reduction function.

[0041] In this system, the upper and lower chambers are connected by a connecting channel. When the cross-sectional area of ​​the connecting channel is small, the flow of hydraulic oil between the upper and lower chambers is more difficult, resulting in a larger pressure drop. In this case, the damping force output by the damping system 300 is larger, and the body 100 exhibits a stiffer state with better handling. When the cross-sectional area of ​​the connecting channel is large, the flow of hydraulic oil between the upper and lower chambers is easier, resulting in a smaller pressure drop. The damping force output by the damping system 300 is smaller, and the body 100 exhibits a softer state with better comfort.

[0042] In order to actively adjust the output damping force of the shock absorber, in some embodiments, the shock absorption system 300 may include a valve device 10. The valve device 10 is disposed in the communication channel and may include a valve inlet and a valve outlet. The valve inlet and the valve outlet are respectively connected to the upper chamber and the lower chamber. When the oil in the shock absorption system 300 flows from one chamber to another, it can pass through the valve device 10. By controlling the opening of the valve device 10, the ease of oil flow in the shock absorber can be adjusted, thereby controlling the damping force of the shock absorber.

[0043] In some embodiments, the valve device 10 may be configured as a solenoid valve, which controls the valve opening pressure by adjusting the current in real time, thereby adjusting the damping of the shock absorber.

[0044] Please refer to Figure 2 and Figure 3 , Figure 2 This application provides a schematic diagram of the structure of a valve device 10. Figure 3 for Figure 2 The diagram shows a flow path of a valve device 10. In some embodiments, the valve device 10 may include a solenoid valve body 51 and an overflow valve assembly. The overflow valve assembly is disposed within the solenoid valve body 51 and includes an overflow valve seat 31, an overflow valve core 32, and an overflow valve spring 33. The overflow valve seat 31 and the solenoid valve body 51 are relatively fixed. Along the axial direction of the solenoid valve body 51, one side of the overflow valve core 32 can abut against the solenoid valve body 51, and the other side is movably connected to the overflow valve seat 31 via the overflow valve spring 33. The valve device 10 forms a first chamber 01 on the side of the overflow valve core 32 connected to the solenoid valve body 51, and the valve device 10 forms a second chamber 02 on the side of the overflow valve body 32 connected to the overflow valve spring 33 and the overflow valve seat 31. The first chamber 01 communicates with the valve inlet.

[0045] The part of the overflow valve core 32 that can abut against the solenoid valve body 51 is the abutting part. Along the radial direction of the solenoid valve body 51, one side of the abutting part is the first chamber, and the other side of the abutting part is the fourth chamber 04. The fourth chamber 04 is connected to the valve outlet.

[0046] It is understood that the arrangement of the first chamber 01 and the second chamber 02 along the axial direction of the solenoid valve body 51, and the arrangement of the fourth chamber 04 and the first chamber 01 along the radial direction of the solenoid valve body 51, is only one arrangement in this application embodiment. In the embodiments of this application, the communication direction of the first chamber 01 and the fourth chamber 04 may be inconsistent with the extension and retraction direction of the overflow valve spring 33. This application does not impose any restrictions on this.

[0047] When the valve device 10 is in the initial state, that is, when the overflow valve core 32 is not subjected to the pressure of the oil entering the valve inlet, the overflow valve core 32 abuts against the solenoid valve body 51 under the elastic force of the overflow valve spring.

[0048] In some embodiments, when the overflow valve core 32 abuts against the solenoid valve body 51, the overflow valve assembly is closed, and the first chamber 01 and the fourth chamber 04 cannot be directly connected.

[0049] In other embodiments, the overflow valve core 32 and / or the solenoid valve body 51 may be provided with an overflow groove so that when the overflow valve core 32 abuts against the solenoid valve body 51, the oil can be connected between the first chamber 01 and the fourth chamber 04 at a small flow rate.

[0050] When oil enters the valve inlet and the hydraulic pressure is greater than the elastic force applied by the relief valve spring 33, the oil pushes the relief valve core 32 to compress the relief valve spring 33, which can separate the contact part from the solenoid valve body 51. At this time, the relief valve assembly opens, and the first chamber 01 and the fourth chamber 04 can be directly connected so that the oil can flow from the valve inlet to the valve outlet.

[0051] The hydraulic pressure that drives the overflow valve core 32 can be the pressure difference between the first chamber 01 and the second chamber 02.

[0052] In some embodiments, the overflow valve core 32 may be provided with an overflow valve side hole 322, which connects the first chamber 01 and the second chamber 02.

[0053] When oil enters the valve inlet and the hydraulic pressure is less than the elastic force applied by the relief valve spring 33, the oil cannot push the relief valve core 32 to compress the relief valve spring 33. At this time, the oil can enter the second chamber 02 from the first chamber 01 through the relief valve side hole 322, so that the oil can flow in the valve device 10.

[0054] In some embodiments, the relief valve assembly may include an open ring 34 disposed between the relief valve core 32 and the relief valve seat 31 to prevent hydraulic fluid from flowing between the second chamber 02 and the fourth chamber 04 through the gap between the relief valve core 32 and the relief valve seat 31.

[0055] In some embodiments, the valve device 10 may further include an upper pressure member, a portion of which abuts against the side of the solenoid valve body 51 opposite to the valve inlet, and another portion of which abuts against the overflow valve seat 31, such that the upper pressure member and the overflow valve seat 31 form a third chamber 03, and the upper pressure member and the solenoid valve body 51 form a fourth chamber 04. The portion of the upper pressure member that abuts against the overflow valve seat 31 is provided with a communicating groove or a through hole, so that the third chamber 03 and the fourth chamber 04 are connected.

[0056] The overflow valve core 32 may be provided with a connecting flow channel 321, one end of which is connected to the second chamber 02 and the other end is connected to the third chamber 03.

[0057] In this way, the oil that enters the second chamber 02 through the overflow valve side hole 322 can flow to the third chamber 03 through the connecting flow channel 321, and then flow into the fourth chamber 04 through the through hole of the upper pressure member to be discharged from the valve outlet.

[0058] It should be noted that the upper pressure component and the solenoid valve body 51 can be separate structures, forming the third chamber 03 and the fourth chamber 04 by the upper pressure component abutting against the solenoid valve body 51 and the overflow valve seat 31. Alternatively, the upper pressure component and the solenoid valve body 51 can be configured as an integral structure, forming the third chamber 03 and the fourth chamber 04 within the overall structure of the upper pressure component and the solenoid valve body 51.

[0059] In other embodiments, the connecting channel 321 may also be provided on the overflow valve seat 31 to connect the second chamber 02 and the third chamber 03.

[0060] This allows for the decoupling of the pilot valve and the relief valve assembly. When the relief valve assembly opens or closes, the relief valve seat 31 is fixed relative to the solenoid valve body 51, while the relief valve core 32 moves axially relative to the solenoid valve body 51 to open and close the relief valve assembly. With the connecting flow channel 321 positioned on the relief valve seat 31, the movement of the relief valve core 32 will not affect the opening and closing of the pilot valve.

[0061] In some embodiments, the valve device 10 may include a valve assembly 1, which may be disposed at one end of the connecting third chamber 03 of the communicating flow channel 321.

[0062] Valve assembly 1 can be used as a pilot valve. When valve assembly 1 is closed, one end of the connecting channel 321 to the third chamber 03 is closed. After the oil enters the second chamber 02, it cannot flow into the third chamber 03. The pressure between the first chamber 01 and the second chamber 02 is the same, and the overflow valve assembly will remain in the closed state.

[0063] When valve assembly 1 is opened, one end of the connecting flow channel 321 to the third chamber 03 is opened. After the oil enters the second chamber 02, it can slowly enter the third chamber 03. The pressure in the second chamber 02 drops, and a pressure difference is formed between the first chamber 01 and the second chamber 02. When the pressure difference between the first chamber 01 and the second chamber 02 can overcome the elastic force applied by the relief valve spring 33, the relief valve assembly can be opened.

[0064] Please refer to Figures 2-4 , Figure 4 This is a schematic diagram of the structure of a valve assembly 1 provided in an embodiment of this application. In some embodiments, the valve assembly 1 may include a valve seat 11, a valve plug 12 and a valve body 13. The valve seat 11 is provided with a valve hole 111, which can communicate with a flow channel 321. The valve plug 12 is disposed opposite to the valve hole 111, and the valve plug 12 is movably connected to the valve body 13. The valve body 13 is disposed on the side of the valve plug 12 that is away from the valve seat 11, and the valve body 13 has a position for blocking the valve hole.

[0065] The valve plug 12 is arranged opposite to the valve hole 111, which enables the valve plug 12 to open or close the valve hole 111, thereby controlling whether hydraulic oil can flow out of the valve hole 111.

[0066] At least a portion of the valve body 13 is located on the side of the valve plug 12 opposite to the valve hole 111, and can push the valve plug 12 to close the valve hole 111. When the hydraulic fluid overcomes the pressure applied to the valve plug 12 by the valve body 13, it can push the valve plug 12 away from the valve hole 111, that is, open the valve hole 111, so that the hydraulic fluid can flow out through the valve hole 111.

[0067] In related technologies, the valve body 13 abuts against the side of the valve plug 12 opposite to the valve seat 11, pressing the valve plug 12 against the valve hole 111. The driving force for closing the valve acts on the valve body 13, and all the pressure on the valve body 13 is applied to the valve plug 12. At this time, to open the valve assembly 1, the hydraulic fluid needs to overcome the pressure exerted by the valve body 13 on the valve plug 12, i.e., all the pressure on the valve body 13, thereby pushing the valve plug 12 and the valve body 13 away from the valve hole 111. This results in a higher pressure required for opening the valve, and a stronger hydraulic pressure on the valve plug 12 at the moment of opening, which can easily cause over-opening. Excessive displacement of the valve plug 12 can cause a sudden change in the flow rate through the valve hole 111, leading to system pressure overshoot and fluctuations.

[0068] Based on this, the valve assembly 1 provided in the embodiments of this application includes a valve seat 11 including a first limiting part and a valve body 13 including a second limiting part. The valve body 13 has an open valve hole position and a blocked valve hole position. When the valve body 13 is in the open valve hole position, the second limiting part and the first limiting part are spaced apart.

[0069] When the valve body 13 is in the position of blocking the valve hole, the second limiting part and the first limiting part are in contact, the second limiting part applies pre-pressure to the first limiting part, and the valve plug 12 has a movable margin relative to the valve body 13 along the axial direction of the valve hole 111.

[0070] In this embodiment, when the valve body 13 is in the open valve hole position, that is, when the valve assembly 1 is open, the second limiting part and the first limiting part are spaced apart. At this time, there is no interaction force between the valve body 13 and the valve seat 11, and the valve body 13 does not push the valve plug 12 to block the valve hole 111, and the valve plug 12 is separated from the valve hole 111.

[0071] When the hydraulic oil in the second chamber 02 enters the connecting passage 321, since the valve plug 12 separates from the valve hole 111, the hydraulic oil can directly enter the third chamber 03 through the valve hole 111, and then enter the fourth chamber 04 through the through hole of the upper pressure component and flow out of the solenoid valve. At this time, when the piston rod and piston cylinder of the damping system 300 move relative to each other, the valve assembly 1 remains open, which allows the oil at the valve inlet to flow out to the valve outlet at a small flow rate, ensuring smooth vibration damping of the vehicle 1000 and improving the comfort of the driver and passengers.

[0072] When the valve body 13 is in the position of blocking the valve hole, that is, when the valve assembly 1 is closed, the driving force of closing the valve drives the valve body 13 to approach the valve seat 11. The part of the valve body 13 on the side of the valve plug 12 opposite to the valve hole 111 drives the valve plug 12 to block the valve hole 111. Since the second limiting part is in contact with the first limiting part, the valve body 13 can apply pre-pressure to the first limiting part through the second limiting part, that is, it can apply pre-pressure to the valve seat 11. At this time, at least part of the pressure borne by the valve body 13 can act on the valve seat 11.

[0073] The valve plug 12 has a movable margin relative to the valve body 13 along the axial direction of the valve hole 111. That is, the valve plug 12 can be movable relative to the valve body 13. The movable margin of the valve plug 12 relative to the valve body 13 can include the valve plug 12 being in a free position or a partially compressed position relative to the valve body 13. When the valve plug 12 is in a free position relative to the valve body 13, the valve plug 12 is not subject to the force of the valve body 13, and the preload borne by the valve seat 11 is the total pressure borne by the valve body 13. When the valve plug 12 is in a partially compressed position relative to the valve body 13, the valve plug 12 can bear only a part of the pressure of the valve body 13, and the preload borne by the valve seat 11 is the other part of the pressure of the valve body 13.

[0074] It should be noted that the direction in which the second limiting part points towards the first limiting part is consistent with the direction in which the valve plug 12 points towards the valve hole 111. Thus, when the driving force for closing the valve drives the valve body 13 to approach the valve seat 11, the valve plug 12 moves towards the valve hole 111, and the second limiting part moves towards the first limiting part.

[0075] In this way, the valve plug 12 can retain some room for movement while sealing the valve orifice 111. When the hydraulic oil overcomes the pressure to open the valve, it does not need to overcome the full pressure borne by the valve body 13. Simply pushing the valve plug 12 to the compression position, moving the valve plug 12 away from the valve orifice 111, can achieve pre-opening of the valve assembly 1, connecting the second chamber 02 and the third chamber 03. At this time, the hydraulic pressure required to open the valve assembly 1 is less than the full pressure borne by the valve body 13. Compared with related technologies, the opening pressure is lower, which can reduce the impact force of the hydraulic oil on the valve plug 12 at the moment the hydraulic oil overcomes the driving force to open the valve, making it less likely to cause over-opening, thereby reducing the problems of system pressure overshoot and jitter at the moment of valve opening.

[0076] The valve seat 12 is provided with a valve hole 111, which can be the outlet of the connecting flow channel 321 to the third chamber 03. In one possible structural design, the outlet of the connecting flow channel 321 can be set in the overflow valve seat 31, and at least a part of the overflow valve seat 31 can form the valve seat 11. In another possible structural design, the outlet of the connecting flow channel 321 can also be set in the overflow valve core 32, and at least a part of the overflow valve core 32 can form the valve seat 11.

[0077] When the valve body 13 is in the position of blocking the valve hole, the valve body 13 is in contact with the valve seat 11. At this time, in one possible structural design, the valve body 13 can be in contact with the overflow valve seat 31, and in another possible structural design, the valve body 13 can also be in contact with the overflow valve core 32.

[0078] Therefore, the connecting plane formed by the overflow valve seat 31 and the overflow valve core 32 can be regarded as the valve seat 11 in the valve assembly 1.

[0079] In some embodiments, the valve body 13 includes a top wall portion 1311 disposed on the side of the valve plug 12 opposite to the valve hole 111. When the valve body 13 is in the valve hole blocking position, the top wall portion 1311 serves to axially limit the valve plug 12. When the hydraulic fluid overcomes the pressure applied to the valve plug 12 by the valve body 13, it can push the valve plug 12 away from the valve hole 111, that is, open the valve hole 111, allowing the hydraulic fluid to flow out through the valve hole 111.

[0080] In some embodiments, the first limiting portion is located around the valve hole 111. The valve body 13 also includes a side frame portion 1312 disposed on the top wall portion 1311 facing the valve seat 11 and surrounding the top wall portion 1311, the side frame portion 1312 forming the second limiting portion.

[0081] When the valve body 13 moves toward the valve hole 111, the second limiting part abuts against the first limiting part, that is, the side frame part 1312 abuts against the periphery of the valve hole 111, and the valve body 13 can no longer press down the valve plug 12, so that the valve plug 12 can have a margin of movement relative to the valve body 13, so that the valve assembly 1 can achieve pre-opening and reduce the phenomenon of system overshoot and jitter.

[0082] In other embodiments, the first limiting part may be disposed on the upper pressure member. In one possible structural design, the upper pressure member may be a fixed iron core, and the valve device 10 may also include a moving iron core, which moves synchronously with the valve body 13, and the second limiting part is disposed on the moving iron core. For example, the surface of the upper pressure member facing the moving iron core is provided with limiting elements such as protrusions or steps. When the valve body 13 approaches the valve hole 111 under the driving force of closing the valve, the moving iron core can abut against the limiting elements on the upper pressure member, thereby preventing the valve body 13 from continuing to approach the valve hole 111, that is, preventing the valve body 13 from continuing to press the valve plug 12, so that the valve plug 12 has a margin of movement relative to the valve body 13, so that the valve assembly 1 can achieve pre-opening and reduce the phenomenon of system overshoot and jitter.

[0083] For example, the first limiting part can also be configured as a non-magnetic ring, disposed between the moving iron core and the fixed iron core. When the valve body 13 approaches the valve hole 111 under the driving force of closing the valve, the moving iron core can abut against the non-magnetic ring, thereby preventing the valve body 13 from continuing to approach the valve hole 111, so that the valve plug 12 has a margin of movement relative to the valve body 13. This configuration can reduce the influence of the moving iron core and the fixed iron core directly abutting against the magnetic field on the electromagnetic force of the valve device 10.

[0084] In this embodiment, all components of the valve device 10 that are stationary relative to the valve seat 11 can be considered as part of the valve seat 11, and all components of the valve device 10 that are stationary relative to the valve body 13 can be considered as part of the valve body 13. That is, the upper pressure member can also be considered as part of the valve seat 11, and the moving iron core can also be considered as part of the valve body 13. Thus, it can be considered that the valve seat 11 is provided with a first limiting part, and the valve body 13 is provided with a second limiting part.

[0085] Please refer to Figure 4 In some embodiments, the valve assembly 1 further includes an elastic element 14 disposed between the valve body 13 and the valve plug 12. When the valve body 13 is in the position of blocking the valve orifice, the elastic element 14 is in a free state or a partially compressed state, so that the valve plug 12 has a margin of movement relative to the valve body 13, that is, the valve plug 12 is in a free position or a partially compressed position relative to the valve body 13.

[0086] The elastic element 14 is disposed between the valve body 13 and the valve plug 12. When the valve body 13 is in the position of blocking the valve hole, that is, when the valve assembly 1 is closed, the driving force of closing the valve drives the valve body 13 to approach the valve seat 11, and drives the elastic element 14 and the valve plug 12 to approach the valve seat to block the valve hole 111.

[0087] Since the elastic element 14 is in a free or partially compressed state when the valve body 13 is in the blocked valve orifice position, it still has a compression margin. When the hydraulic oil pushes the valve plug 12 to open the valve, the hydraulic oil pressure does not need to overcome the full pressure borne by the valve body 13; it can only push the elastic element 14 to compress, overcoming the elastic force of the elastic element 14 supporting the valve plug 12, thus causing the valve plug 12 to leave the valve orifice 111, achieving pre-opening of the valve assembly 1. In this way, the opening pressure can be reduced, reducing the problems of system pressure overshoot and jitter at the moment of valve opening.

[0088] In some embodiments, the valve plug 12 is movably connected to the valve body 13. This allows the valve plug 12 to move relative to the valve body 13 when the elastic element 14 is compressed, thereby opening or closing the valve orifice 111.

[0089] In other embodiments, the valve plug 12 can be configured as an elastic structure. When the valve body 13 is in the position of blocking the valve orifice, the valve plug 12 can be in a free state or a partially compressed state. When the hydraulic oil pushes the valve plug 12 to open the valve, the pressure of the hydraulic oil can compress the valve plug 12, overcoming the elastic force of the valve plug 12. That is, the valve plug 12 can be moved away from the valve orifice 111 with a smaller pressure, realizing the pre-opening of the valve assembly 1 and avoiding the problems of system pressure overshoot and jitter at the moment of valve opening.

[0090] In some embodiments, the valve plug 12 and the valve body 13 may be fixedly connected. The valve plug 12 may pre-open the valve by its own elastic deformation, and the valve body 13 may provide support and fixation for the valve plug 12.

[0091] In other embodiments, the valve plug 12 and the valve body 13 can also be movably connected. In this way, the valve plug 12 can open or block the valve hole 111 by its own elastic deformation, and can also be displaced relative to the valve hole 111 to pre-open the valve. At this time, the valve body 13 can play an axial limiting role for the valve plug 12.

[0092] In some embodiments, when the valve body 13 is in the position of blocking the valve orifice, the elastic element 14 is in a free state, and the elastic element 14 is in contact with the valve body 13 and with the valve plug 12.

[0093] When the valve body 13 is in the position of blocking the valve hole, the elastic element 14 is in contact with the valve body 13 and the valve plug 12. At this time, the elastic element 14 is in a free state and is not pre-pressurized. The valve plug 12 does not bear the pre-pressure. Under relatively small pressure conditions, the hydraulic oil can compress the elastic element 14 to achieve pre-opening of the valve, which can improve the pressure overshoot and jitter of the system.

[0094] Simultaneously, when the valve body 13 is in the blocked valve orifice position, the hydraulic oil needs to overcome the elastic force of the elastic element 14 supporting the valve plug 12 to open the valve. When the valve plug 12 opens the valve orifice 111 to a small degree, the hydraulic oil flow rate is slow, and the hydraulic oil in the second chamber 02 can still continue to overcome all the pressure borne by the valve body 13. During the process of opening the valve orifice 111 by the valve plug 12 solely by the compression of the elastic element 14, the hydraulic oil can overcome all the pressure borne by the valve body 13, thereby pushing the valve body 13 away from the valve seat 11, realizing further opening of the valve assembly 1, and avoiding excessively large pre-opening valve opening that causes the oil flow rate to be too fast, making it difficult to overcome all the pressure borne by the valve body 13 and affecting the pressure of the valve device 10.

[0095] In some embodiments, when the valve body 13 is in the position of blocking the valve orifice, the elastic element 14 is in a free state, and the elastic element 14 is spaced apart from the valve body 13, and / or the elastic element 14 is spaced apart from the valve plug 12.

[0096] When the valve body 13 is in the blocked valve orifice position, the elastic element 14 is spaced apart from the valve body 13 and / or from the valve plug 12. At this time, the elastic element 14 is in a free state and not pre-pressurized, and the valve plug 12 does not bear the pressure of the valve body 13. Because there is a gap between the elastic element 14 and the valve body 13, and between the elastic element 14 and the valve plug 12, when the hydraulic oil in the second chamber 02 enters the connecting passage 321, the hydraulic oil pushes the valve plug 12 away from the valve orifice 111 to eliminate the gap between the elastic element 14 and the valve body 13, or between the elastic element 14 and the valve plug 12. The valve can be opened without deforming the elastic element 14. This further reduces the pressure required for pre-opening the valve and improves system overshoot and jitter.

[0097] However, when the valve body 13 is in the position of blocking the valve orifice, there is a gap between the elastic element 14 and the valve body 13 and / or between the elastic element 14 and the valve plug 12. After the hydraulic oil pushes the valve plug 12 to eliminate the gap and open the valve, it further pre-opens the valve by overcoming the elastic force of the elastic element 14 supporting the valve plug 12. Before the hydraulic oil overcomes the full pressure borne by the valve body 13, the valve assembly 1 pre-opens the valve to a large degree, resulting in a large discharge flow. The hydraulic oil in the second chamber 02 forms a hydraulic pressure that overcomes the full pressure borne by the valve body 13 relatively slowly, affecting the pressure build-up speed of the valve device 10.

[0098] In some embodiments, when the valve body 13 is in the position of blocking the valve orifice, the elastic element 14 is in a partially compressed state, and the elastic element 14 is in contact with the valve body 13 and with the valve plug 12.

[0099] When the valve body 13 is in the position of blocking the valve hole, the elastic element 14 is in a partially compressed state, and the elastic element 14 is in contact with the valve body 13 and the valve plug 12. At this time, the valve plug 12 bears some pressure. Since the elastic element 14 has a compression margin, the hydraulic oil can achieve pre-opening of the valve by compressing the elastic element 14, which can also improve the pressure overshoot and jitter of the system.

[0100] Meanwhile, the hydraulic oil needs to overcome part of the pressure borne by the valve plug 12 and the elastic force of the elastic element 14 supporting the valve plug 12 before it can open the valve in advance. Before the hydraulic oil overcomes all the pressure borne by the valve body 13, the valve plug 12 opens the valve hole 111 to a smaller degree and the leakage flow is smaller. This helps to increase the speed at which the hydraulic oil in the second chamber 02 forms a hydraulic pressure that overcomes all the pressure borne by the valve body 13, and avoids affecting the pressure magnitude and pressure build-up speed of the valve assembly 1.

[0101] In some embodiments, the stiffness of the valve plug 12 is greater than the stiffness of the elastic element 14.

[0102] In this way, when the hydraulic oil applies pressure to the valve plug 12 to open the valve, it can first compress and deform the elastic element 14, thereby driving the valve plug 12 away from the valve hole 111. If the stiffness of the valve plug 12 is less than the stiffness of the elastic element 14, the valve plug 12 may deform before the elastic element 14 is compressed and deformed, causing the hydraulic oil to flow out from the gap created by the deformation of the valve plug 12, and thus failing to push the elastic element 14 to compress and drive the valve plug 12 away from the valve hole 111.

[0103] Please refer to Figures 2-5 , Figure 5 This is a schematic diagram of the structure of an elastic element 14 provided in an embodiment of this application. In some embodiments, the elastic element 14 can be a spring.

[0104] The elastic element 14 is set as a reed, which can generate elastic deformation when subjected to pressure, thereby enabling the valve assembly 1 to pre-open the valve. At the same time, the reed can have a certain rigidity, which can prevent the elastic element 14 from deforming too easily before the hydraulic oil overcomes the full pressure borne by the valve body 13, thus avoiding the valve assembly 1 from having a large pre-opening opening degree and the valve device 10 from having difficulty building pressure.

[0105] In addition, since the elastic element 14 is located in a hydraulic oil environment, the reed can prevent the oil from corroding the elastic element 14.

[0106] In other embodiments, the elastic element 14 may also be configured as an elastic structure such as rubber or a spring.

[0107] In some embodiments, the elastic element 14 is annular, and the valve hole 111 is located in the region surrounded by the elastic element 14 along the axial direction of the valve hole 111.

[0108] It should be noted that the projection of the valve hole 111 along the axial direction of the valve hole 111 onto the elastic member 14 within the area surrounded by the elastic member 14 may include the size of the area surrounding the elastic member 14 being equal to the size of the projection of the valve hole 111 along the axial direction of the valve hole 111 onto the elastic member 14, or the size of the area surrounding the elastic member 14 being larger than the size of the projection of the valve hole 111 along the axial direction of the valve hole 111 onto the elastic member 14.

[0109] By setting the elastic element 14 as an annular shape and the projection of the valve hole 111 is located within the surrounding area of ​​the elastic element 14, when the hydraulic oil in the valve hole 111 applies pressure to the valve plug 12, the pressure can be evenly distributed to the annular area of ​​the elastic element 14, thereby enabling the elastic element 14 to deform evenly and causing the valve plug 12 to separate circumferentially from the valve hole 111, thus avoiding valve opening jamming or interference with the valve opening flow area.

[0110] Please refer to Figures 2-6 , Figure 6This is a schematic diagram of the structure of a valve plug 12 provided in an embodiment of this application. In some embodiments, the valve plug 12 may include a first part and a second part connected to each other. When the valve plug 12 blocks the valve hole 111, the first part can extend into the valve hole 111, and the second part is located on the side of the first part opposite to the valve hole 111, and the radial dimension of the second part is greater than the radial dimension of the first part.

[0111] With this configuration, the first part is housed within the valve hole 111, allowing the valve hole 111 to be closed. The radial dimension of the second part is larger than that of the first part, enabling it to seal the gap between the first part and the valve hole 111, thus reducing leakage.

[0112] At this time, the elastic element 14 is set as an annular shape, and the projection of the valve hole 111 is located in the surrounding area of ​​the elastic element 14. The pressure of the hydraulic oil on the valve plug 12 can be applied to the elastic element 14 through the second part, so that the force on the elastic element 14 can be more uniform.

[0113] In some embodiments, in order to reduce the weight of the valve plug 12, the second part may be configured as an annular shape, and the inner circumferential surface of the second part is connected to the outer circumferential surface of the first part.

[0114] At this time, the elastic element 14 is set as a ring, which corresponds to the arrangement of the second part, so that the pressure of the hydraulic oil can be transmitted to the elastic element 14.

[0115] In some embodiments, the elastic member 14 extends in a wavy shape along the circumference of the elastic member 14.

[0116] In this way, when the hydraulic oil pushes the valve plug 12, the force points of the elastic element 14 can be increased. The force points between the elastic element 14 and the valve plug 12, as well as between the elastic element 14 and the valve body 13, are all arranged along the circumference of the elastic element 14. This makes the force on the elastic element 14 uniform, and the deformation can be carried out around the circumference of the valve hole 111. This can prevent the valve plug 12 from tilting when the valve hole 111 is opened, thus avoiding interference with the flow area of ​​the valve hole 111.

[0117] In other embodiments, the elastic element 14 may also be configured as a snap ring, etc., which is not limited in this application.

[0118] Please continue to refer to Figures 2-4 In some embodiments, when the valve body 13 is in the open valve port position, there is a first gap δ between the valve body 13 and the valve seat 11, and there is a second gap s0 between the elastic element 14 and the valve body 13, and / or between the elastic element 14 and the valve plug 12.

[0119] Since the valve body 13 and the valve seat 11 are spaced apart, the valve body 13 will not apply pre-pressure to the valve seat 11. Therefore, the elastic element 14 remains in a free state. The elastic element 14 can be located on the side closer to the valve body 13, or on the side closer to the valve plug 12, or in the middle position between the valve body 13 and the valve plug 12.

[0120] For example, when the elastic member 14 is in contact with the valve body 13, there may be a second gap s0 between the elastic member 14 and the valve plug 12. When the elastic member 14 is in contact with the valve plug 12, there may be a second gap s0 between the elastic member 14 and the valve body 13. When the elastic member 14 is located in the middle position between the valve body 13 and the valve plug 12, the sum of the gap between the elastic member 14 and the valve plug 12 and the gap between the elastic member 14 and the valve body 13 is the second gap s0.

[0121] This application provides an illustrative example of the fitting configuration of the elastic element 14 and the valve plug 12.

[0122] In some embodiments, when the valve body 13 is in the open valve port position, the size of the first gap δ is greater than the size of the second gap s0.

[0123] In this way, when the valve body 13 switches from the open valve port position to the closed valve port position, the distance the valve body 13 moves towards the valve seat 11 is equal to the first gap δ, causing the valve body 13 to contact the valve seat 11. Since the size of the second gap s0 is smaller than the first gap δ, when the valve body 13 contacts the valve seat 11, the elastic element 14 will be compressed and undergo elastic deformation, and the elastic element 14 will be in a partially compressed state. At this time, the driving force for closing the valve is applied to the valve body 13. Part of the pressure on the valve body 13 acts on the valve seat 11, and the other part acts on the structure composed of the elastic element 14 and the valve plug 12. When the hydraulic oil pushes the valve plug 12 to open the valve, the elastic element 14 has a compression margin, which can improve the system pressure overshoot and jitter without affecting the pressure build-up magnitude and speed of the valve device 10.

[0124] In some embodiments, when the valve body 13 is in the open valve port position, the size of the first gap δ is equal to the size of the second gap s0.

[0125] In this way, when the valve body 13 switches from the open valve hole position to the closed valve hole position, the distance that the valve body 13 moves toward the valve seat 11 is equal to the first gap δ, so that the valve body 13 contacts the valve seat 11. Since the size of the second gap s0 is equal to the first gap δ, when the valve body 13 contacts the valve seat 11, the elastic element 14 is in contact with the valve body 13, and the elastic element 14 is in a free state and is not pre-pressurized. When the hydraulic oil pushes the valve plug 12 to open the valve, the elastic element 14 can be compressed and deformed to achieve pre-opening of the valve, thereby improving the system pressure overshoot and jitter.

[0126] In some embodiments, when the valve body 13 is in the open valve port position, the size of the first gap δ is smaller than the size of the second gap s0.

[0127] In this way, when the valve body 13 switches from the open valve hole position to the closed valve hole position, the distance that the valve body 13 moves toward the valve seat 11 is equal to the first gap δ, so that the valve body 13 contacts the valve seat 11. Since the size of the second gap s0 is smaller than the first gap δ, when the valve body 13 contacts the valve seat 11, there is still a gap between the elastic element 14 and the valve body 13. The size of the gap is the difference between the first gap δ and the second gap s0. The elastic element 14 is in a free state and is not pre-compressed. When the hydraulic oil pushes the valve plug 12 to open the valve, the valve plug 12 can be pushed to eliminate the gap to open the valve hole 111, and the elastic element 14 can be compressed and deformed to achieve pre-opening of the valve, thereby improving system pressure overshoot and jitter.

[0128] Please continue to refer to Figure 2 and Figure 3 In some embodiments, the valve body 13 also has an open valve port position. When the valve body 13 is in the open valve port position, the valve body 13 and the valve seat 11 are spaced apart. The valve assembly 1 also includes a drive assembly 2, which is used to drive the valve body 13 to switch between the open valve port position and the closed valve port position.

[0129] The valve assembly 1 includes a drive assembly 2, which can apply a driving force to the valve body 13 to move the valve body 13 and the valve plug 12 closer to or further away from the valve orifice 111, thereby enabling the valve body 13 to switch between an open valve orifice position and a closed valve orifice position to adjust the flow area of ​​the hydraulic oil flowing through the valve device 10.

[0130] In some embodiments, valve assembly 1 may be configured as a solenoid valve. In this case, by energizing the coil of the solenoid valve, an electromagnetic force can be applied to the valve body 13, thereby pushing the valve body 13 to move relative to the valve seat 11, so as to switch between the open valve port position and the closed valve port position.

[0131] In some embodiments, the drive assembly 2 includes a magnet structure 21 and a coil structure 22, one of which is fixed relative to the valve body 13, and the other of which is fixed relative to the valve seat 11.

[0132] When the coil structure 22 is energized, it generates an electromagnetic field. Under the influence of this electromagnetic field, the magnet structure 21 can displace relative to the coil structure 22. Since one of the magnet structure 21 and the coil structure 22 is fixedly connected to the valve body 13, and the other is fixedly connected to the valve seat 11, the relative displacement of the magnet structure 21 and the coil structure 22 can cause the valve body 13 and the valve seat 11 to move relative to each other. In this way, the valve body 13 can be moved closer to or further away from the valve seat 11, thereby opening and closing the valve assembly 1.

[0133] In some embodiments, the drive component 2 may further include a coil frame 24, with a coil structure 22 disposed on the coil frame 24, and the coil frame 24 is used to protect and support the coil.

[0134] In some embodiments, the magnet structure 21 can be riveted to the valve body 13. When energized, the magnet structure 21 and the valve body 13 move together due to magnetic induction.

[0135] In some embodiments, the drive assembly 2 may further include a core cover 26, which has a receiving space inside, and a magnetic structure is housed in the receiving space to protect the magnetic assembly. At least a portion of the core cover 26 is located between the magnetic structure and the coil structure 22, and is capable of conducting magnetism between the coil structure 22 and the magnetic structure.

[0136] In some embodiments, the drive assembly 2 may further include a magnetic isolation ring 25, which is disposed between the coil structure 22 and the magnetic structure to realize the electromagnetic force curve design.

[0137] In some embodiments, the drive assembly 2 may further include a fixed iron core 27, which may be located on the side of the magnetic structure and coil structure 22 facing the opening of the receiving space. The fixed iron core 27 is used to support and fix the magnetic structure and is capable of conducting magnetism between the magnetic structure and the coil structure 22.

[0138] In some embodiments, the fixed iron core 21 can serve as an upper pressure member, abutting against the overflow valve seat 31 and the solenoid valve body 51 to form a third chamber 03 and a fourth chamber 04.

[0139] In some embodiments, the fixed iron core 27 is provided with a guide hole, and the valve body 13 passes through the guide hole. In this way, the two ends of the valve body 13 located at the guide hole can be connected to the magnetic structure and the valve plug 12 respectively, so that the movement of the magnetic structure under the action of the coil structure 22 can be transmitted to the valve plug 12, thereby driving the valve plug 12 to open and close the valve orifice 111.

[0140] In some embodiments, the drive assembly 2 may further include a guide sleeve 28, wherein there are multiple guide sleeves 28, one of which is disposed between the valve body 13 and the guide hole, and another of which is disposed at the end of the valve body 13 away from the valve plug 12. This arrangement can provide guidance for the up and down movement of the valve body 13 and prevent the valve body 13 from moving skewed or stuck.

[0141] In some embodiments, when the valve body 13 is in the open valve orifice position, the coil structure 22 is de-energized, and when the valve body 13 is in the closed valve orifice position, the coil structure 22 is energized.

[0142] With this configuration, the solenoid valve can be a normally open valve. When driving at low speed, the vibration between the vehicle body 100 and the wheel 200 is small, and the flow rate of the hydraulic oil between the upper and lower chambers in the damping system 300 is relatively slow. When the coil structure 22 is de-energized, the valve plug 12 does not block the valve hole 111, allowing the hydraulic oil to flow slowly at a small flow rate, thereby realizing the damping function of the damping system 300.

[0143] When the coil structure 22 is energized, the magnet structure 21 can move relative to the coil structure 22, thereby driving the valve body 13 and valve plug 12 to move closer to the valve seat 11 and close the valve hole 111. In this way, the damping of the vibration reduction system 300 can be controlled and increased.

[0144] In other embodiments, when the valve body 13 is in the open valve position, the coil structure 22 is energized, and when the valve body 13 is in the closed valve position, the coil structure 22 is de-energized.

[0145] With this configuration, the solenoid valve can be a normally closed valve. When the valve assembly 1 is not energized, the damping of the vibration damping system 300 is relatively large, and when the valve assembly 1 is energized, the damping of the vibration damping system 300 is relatively small.

[0146] With these two configurations, valve assembly 1 can be adapted to different vehicle 1000 scenarios. For example, if vehicle 1000 is commonly used on smooth, flat, low-speed urban roads, valve assembly 1 can be configured as a normally open valve, remaining open when not powered, thus improving vehicle 1000 comfort. If vehicle 1000 is commonly used in off-road conditions, valve assembly 1 can be configured as a normally closed valve, remaining closed when not powered, thus improving vehicle 1000 handling.

[0147] In some embodiments, the drive assembly 2 further includes an elastic reset member 23, which is used to apply an elastic reset force to the valve body 13 when the coil structure 22 is de-energized.

[0148] In this way, when the coil structure 22 is de-energized, the elastic reset member 23 can apply an elastic reset force to the valve body 13, thereby causing the valve body 13 to be separated from the valve seat 11, so that the valve body 13 is in the open valve hole position.

[0149] When the coil structure 22 is energized and the valve body 13 is in the closed valve position, the electromagnetic force applied by the coil structure 22 to the valve body 13 can pull the elastic reset member 23 to deform. The electromagnetic force of the coil structure 22 and the elastic force of the elastic reset member 23 constitute the driving force for closing the valve. Acting on the valve body 13, it can make the valve body 13 contact the valve seat 11. The hydraulic pressure of the hydraulic oil overcomes the driving force for closing the valve, which can make the valve body 13 move away from the valve seat 11 and drive the valve assembly 1 to open completely.

[0150] In order for the oil to first compress the elastic element 14 and then overcome the elastic force of the elastic reset element 23 when entering the third chamber 03 from the second chamber 02, the first gap δ and the second gap s0 need to satisfy: ,in, The driving force applied to the valve body 13 when the drive assembly 2 drives the valve body 13 to switch from the open valve port position to the closed valve port position, k is the stiffness of the elastic reset member 23, k bp The stiffness of the elastic element 14.

[0151] This design prevents the valve body 13 from being directly pushed open when the elastic element 14 is not functioning, thus avoiding system fluctuations.

[0152] For example, when the valve device 10 is configured as a solenoid valve, when the drive assembly 2 drives the valve body 13 to switch from the open valve port position to the closed valve port position, an electromagnetic force is applied to the valve body 13. The electromagnetic force applied to the valve body 13 by the coil structure 22 The elastic reset element 23 is stretched by a distance of When the elastic reset member 23 applies an elastic force to the valve body 13, then When the drive assembly 2 drives the valve body 13 to switch from the open valve port position to the closed valve port position, the driving force applied to the valve body 13 is the resultant force of the electromagnetic force and the elastic reset member 23 applied to the valve body 13. At this time, the distance the valve body 13 moves is... .

[0153] For example, the drive component 2 of the valve device 10 is not limited to including electromagnetic components, and the source of driving force can also be a hydraulic cylinder, a thrust motor, etc. This application does not limit this.

[0154] When the valve device 10 is closed, the oil pushes the valve plug 12 to move away from the valve hole 111 to achieve pre-opening of the valve, and further pushes the valve body 12 to move away from the valve hole 111 to achieve opening of the valve assembly 1.

[0155] Specifically, in the first stage, the valve plug 12 moves away from the valve orifice 111 under hydraulic pressure and compresses the elastic element 14. At this time, since the compressive force of the elastic element 14 is less than the driving force of the drive assembly 2 on the valve body 13, only the valve plug 12 moves, and the valve body 13 has not yet started to move. Afterward, the compressive force of the elastic element 14 becomes greater than the driving force on the valve body 13, and both the valve plug 12 and the valve body 13 begin to move. This stage is the second stage.

[0156] At the end of the first stage and the beginning of the second stage, valve plug 12 has been pre-opened to the following degree: , When ≥0, the opening degree in the first stage is: , At that time, the opening degree in the first stage is: , At this time, the flow area of ​​valve orifice 111 is: , Where d is the diameter of valve orifice 111, and θ is the taper of the pilot valve plug.

[0157] To meet the damping force requirements of different shock absorbers, certain requirements are put forward on the stiffness of the elastic element 14. According to the expression of the pre-opening degree of the valve plug 12, there is an optimal range for the stiffness of the elastic element 14. When the stiffness is too large, the pre-opening degree of the valve plug 12 is small, which has limited effect on improving the overshoot and vibration. When the stiffness is too small, the pre-opening degree is too large, resulting in large leakage and affecting the pressure build-up speed of the solenoid valve.

[0158] Furthermore, as the current increases, the electromagnetic force increases, the pre-opening degree of the pilot valve increases, the valve opening and pressure relief effect becomes stronger, and the effect of improving overshoot jitter is better. This is consistent with the rule that high current, high speed and high flow conditions are more likely to cause energy overshoot and system pressure overshoot fluctuations.

[0159] Please refer to Figures 2-8 , Figure 7 This is a schematic diagram of the structure of a valve body 13 provided in an embodiment of this application. Figure 8 for Figure 7 The figure shows a cross-sectional view of a valve body 13; in some embodiments, when the valve body 13 is in the position of blocking the valve hole, the valve body 13 and the valve seat 11 enclose a receiving cavity 131, and the valve plug 12 is disposed in the receiving cavity 131.

[0160] In this way, the valve plug 12 can be fixed and kept in the position of closing the valve hole 111. Furthermore, through the enclosure of the valve body 13 and the valve seat 11, the valve body 13 can contact the valve seat 11, and the valve seat 11 can bear the pre-pressure, providing the valve plug 12 with a margin of movement.

[0161] In some embodiments, the valve body 13 and / or the valve seat 11 are provided with a communication hole 132. One end of the communication hole 132 is connected to the portion between the valve plug 12 and the inner wall of the valve hole 111 in the accommodating cavity 131, and the other end is connected to the outlet of the valve assembly 1 or forms the outlet of the valve assembly 1.

[0162] When the valve body 13 is in the position of blocking the valve hole, as the elastic element 14 compresses the valve plug 12 and leaves the valve hole 111, the hydraulic oil does not push the valve body 13 away from the valve seat 11. The valve body 13 and / or the valve seat 11 are provided with a connecting hole 132, which allows the hydraulic oil to flow out of the valve assembly 1 through the connecting hole 132, thereby realizing pre-opening of the valve and reducing system overshoot and jitter.

[0163] Please continue to refer to Figure 2 and Figure 3 In some embodiments, the valve device 10 may include a solenoid valve housing 53 connected to the solenoid valve body 51, and a receiving space is formed between the solenoid valve body 51 and the solenoid valve housing 53. The overflow valve assembly, valve assembly 1, etc. are housed in the receiving space, and the solenoid valve body 51 and the solenoid valve housing 53 can serve as support, connection and protection.

[0164] In some embodiments, the solenoid valve body 51 and the solenoid valve housing 53 are connected by threads.

[0165] In some embodiments, the valve device 10 may further include a one-way valve assembly, which includes a one-way valve seat 41, a one-way valve plate 42, and a one-way valve spring 43. The one-way valve assembly is connected to the valve inlet, and the one-way valve seat 41 is threadedly connected to the solenoid valve body 51.

[0166] A through hole is formed in the one-way valve seat 41. One end of the through hole is connected to or forms a valve inlet. A one-way valve plate 42 is placed over the other end of the through hole, and a one-way valve spring 43 is connected to the side of the one-way valve plate 42 facing away from the one-way valve seat 41. The one-way valve spring 43 applies an elastic force to the one-way valve plate 42 to press the one-way valve plate 42 tightly against the through hole.

[0167] The side of the one-way valve plate 42 facing the one-way valve spring 43, together with the solenoid valve body 51 and the overflow valve core 32, forms the first chamber 01.

[0168] In some embodiments, the one-way valve seat 41 is provided with a lateral opening. When oil flows into the valve device 10 from the first chamber 01 and flows out of the valve device 10 from the fourth chamber 04, the one-way valve assembly does not function, and the valve device 10 functions only as a solenoid valve.

[0169] When the oil flows in the reverse direction, that is, when the oil enters the valve device 10 through the side opening, the oil pushes the one-way valve plate 42 to open the through hole and flows out through the through hole at the bottom of the one-way valve seat 41. The valve assembly 10 functions as a one-way valve assembly, and the solenoid valve does not function.

[0170] In some embodiments, the valve device 10 further includes a locking cover 52, which surrounds the solenoid valve housing 53 and is used to secure the solenoid valve and prevent it from being forced open by oil pressure.

[0171] In some embodiments, the valve device 10 further includes a connector 54 for electrically connecting the coil structure 22 to the vehicle 1000.

[0172] In some embodiments, the valve device 10 further includes a sealing ring 55, which is connected to the outer periphery of the one-way valve seat 41 to seal the communication channel between the upper and lower chambers with the valve device 10 and prevent oil leakage.

[0173] Please continue to refer to Figure 2 and Figure 3 In some embodiments, when the piston rod of the vibration damping system 300 reciprocates, oil flows into the valve device 10 from the valve inlet, and the flow rate Q satisfies the following relationship with the pressure difference ΔP across the valve device 10: Where c is the flow coefficient, A is the effective throttling area within valve device 10, and ρ is the oil density.

[0174] The oil circuit in the valve device 10 provided in this embodiment is as follows: When the hydraulic oil enters the valve inlet, firstly, the oil enters the first chamber 01, flows from the first chamber 01 through the overflow valve side hole 322 to the second chamber 02, flows through the connecting flow channel 321 through the valve hole 111 of the valve assembly 1 to the third chamber 03, and finally flows through the through hole of the upper pressure member to the fourth chamber 04. The above oil circuit is called the pilot valve oil circuit.

[0175] Subsequently, as the flow rate increases, the pressure difference between the first chamber 01 and the second chamber 02 gradually increases. After this pressure difference overcomes the preload of the relief valve spring 33, the relief valve core 32 moves away from the solenoid valve body 51, causing the contact part of the relief valve core 32 to separate from the solenoid valve body 51, thereby opening the relief valve and connecting the first chamber 01 and the fourth chamber 04. At this time, some oil will flow out through the connecting passage between the first chamber 01 and the fourth chamber 04.

[0176] Please refer to Figure 9 and Figure 10 , Figure 9 This application provides a flow-pressure characteristic diagram of a valve device 10 according to an embodiment of the present application. Figure 10 This is a diagram illustrating the dynamometer characteristics of a valve device 10 provided in an embodiment of this application.

[0177] This application presents a system simulation of the valve device 10 when the size of the first gap δ is equal to the size of the second gap s0. According to the simulation analysis, compared with valve devices where the valve assembly cannot open the valve in advance, i.e., the curves of other valves shown in the figure, the valve device 10 provided in this application embodiment, i.e., the curve of this valve shown in the figure, has a smoother valve opening process, and there is no overshoot fluctuation in the flow pressure curve and the indicator curve.

[0178] In the description of the embodiments of this application, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0179] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A valve assembly, characterized in that, include: The valve seat (11) is provided with a valve hole (111), and the valve seat (11) includes a first limiting part; The valve plug (12) is opposite to the valve hole (111); A valve body (13) is provided at least partly on the side of the valve plug (12) opposite to the valve hole (111), and the valve plug (12) is movably connected to the valve body (13); the valve body (13) includes a second limiting part; the valve body (13) has an open valve hole position and a blocked valve hole position, when the valve body (13) is in the open valve hole position, the second limiting part and the first limiting part are spaced apart; when the valve body (13) is in the blocked valve hole position, the second limiting part and the first limiting part are in contact, and the valve plug (12) has a movable allowance relative to the valve body (13) along the axial direction of the valve hole (111).

2. The valve assembly according to claim 1, characterized in that, Also includes: An elastic element (14) is disposed between the valve body (13) and the valve plug (12); When the valve body (13) is in the position of the blocked valve hole, the elastic element (14) is in a free state or a partially compressed state, so that the valve plug (12) has a movable margin relative to the valve body (13) along the axial direction of the valve hole.

3. The valve assembly according to claim 2, characterized in that, When the valve body (13) is in the position of the blocking valve hole, the elastic element (14) is in a free state, and the elastic element (14) is in contact with the valve body (13) and the valve plug (12).

4. The valve assembly according to claim 2, characterized in that, When the valve body (13) is in the position of the blocking valve hole, the elastic element (14) is in a free state, and the elastic element (14) is spaced apart from the valve body (13) and / or from the valve plug (12).

5. The valve assembly according to any one of claims 2-4, characterized in that, The stiffness of the valve plug (12) is greater than that of the elastic element (14).

6. The valve assembly according to any one of claims 2-4, characterized in that, The elastic element (14) is a spring.

7. The valve assembly according to any one of claims 2-4, characterized in that, The elastic element (14) is annular, and the valve hole (111) along the axial direction of the valve hole (111) is located in the area surrounded by the elastic element (14).

8. The valve assembly according to claim 7, characterized in that, Along the circumference of the elastic element (14), the elastic element (14) extends in a wavy shape.

9. The valve assembly according to claim 2, characterized in that, When the valve body (13) is in the open valve hole position, there is a first gap δ between the second limiting part and the first limiting part, and there is a second gap s0 between the elastic member (14) and the valve body (13), and / or between the elastic member (14) and the valve plug (12); The size of the first gap δ is greater than the size of the second gap s0, or, The size of the first gap δ is equal to the size of the second gap s0, or, The size of the first gap δ is smaller than the size of the second gap s0.

10. The valve assembly according to claim 2, characterized in that, The valve assembly (1) further includes a drive assembly (2) for driving the valve body (13) to switch between the open valve port position and the closed valve port position.

11. The valve assembly according to claim 10, characterized in that, The drive assembly (2) further includes an elastic reset member, which is used to apply an elastic reset force to the valve body (13); When the valve body (13) is in the open valve hole position, there is a first gap δ between the valve body (13) and the valve seat (11), and there is a second gap s0 between the elastic element (14) and the valve body (13), and / or between the elastic element (14) and the valve plug (12); The dimensions of the first gap δ and the second gap s0 satisfy the following: ； in, The driving force applied to the valve body (13) when the driving assembly (2) drives the valve body (13) to switch from the open valve port position to the closed valve port position, k is the stiffness of the elastic reset member (23), k bp The stiffness of the elastic element (14) is given.

12. The valve assembly according to claim 1, characterized in that, The valve body (13) includes a top wall portion (1311), which is located on the side of the valve plug (12) opposite to the valve hole (111).

13. The valve assembly according to claim 11, characterized in that, The first limiting portion is located on the periphery of the valve hole (111); and / or, the valve body (13) further includes a side frame portion (1312) disposed on the top wall portion (1311) facing the valve seat (11) and surrounding the top wall portion (1311), the side frame portion (1312) forming the second limiting portion.

14. The valve assembly according to claim 1, characterized in that, When the valve body (13) is in the position of the blocking valve hole, the valve body (13) and the valve seat (11) enclose a receiving cavity (131), and the valve plug (12) is located in the receiving cavity (131).

15. The valve assembly according to claim 14, characterized in that, The valve body (13) and / or the valve seat (11) are provided with a connecting hole (132), one end of the connecting hole (132) is connected to the receiving cavity (131), and the other end is connected to the outlet of the valve assembly (1) or forms the outlet of the valve assembly (1).

16. A valve device, characterized in that, include: The valve assembly (1) according to any one of claims 1-15.

17. A vibration reduction system, characterized in that, It includes the valve assembly (1) as described in any one of claims 1-15, or the valve device (10) as described in claim 16.

18. A vehicle, characterized in that, It includes the valve assembly (1) according to any one of claims 1-15, or the valve device (10) according to claim 16, or the vibration damping system (300) according to claim 17.

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