Solenoid valve, suspension system and vehicle

Abstract

The present application discloses a solenoid valve, a suspension system and a vehicle, belonging to the field of vehicle technology. It includes: a valve body assembly is provided with a valve port; a valve plug; a static iron core is fixedly arranged relative to the valve body assembly; a moving iron core can move between a first position and a second position, when the moving iron core is in the first position, the moving iron core is separated from the static iron core, and the valve plug blocks the valve port; when the moving iron core is in the second position, the moving iron core abuts against the static iron core, and the valve plug opens the valve port; an elastic member abuts against the moving iron core toward the first position; when the moving iron core is in the second position, the buffer abuts against both the static iron core and the moving iron core, and the buffer is in an elastically compressed state; a driving assembly is used to magnetize the static iron core and the moving iron core, so that the moving iron core has a tendency to move toward the second position under the action of magnetic force. The buffer has the beneficial effect of avoiding the noise generated by the collision between the moving iron core and the static iron core, and also has the beneficial effect of no longer requiring the driving assembly in the solenoid valve to provide a large effective maintaining current to keep the solenoid valve in an open valve state.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and specifically relates to a solenoid valve, a suspension system and a vehicle. Background Art

[0002] The solenoid valve is connected to the power supply. When the coil on the solenoid valve is energized and generates a magnetic field, the moving iron core in the valve body and the magnetized static iron core attract each other. Both the moving iron core and the static iron core are rigid parts. When the two attract each other, a knocking sound is generated, which is the main source of noise in the solenoid valve.

[0003] In the related art, in order to avoid the above-mentioned noise, a buffer is usually provided to isolate the moving iron core from the stationary iron core from the hard collision.

[0004] However, the setting of the buffer member creates a gap between the moving iron core and the stationary iron core, resulting in a continuously large current in the solenoid valve that needs to maintain an open valve state, causing a large energy consumption of the solenoid coil and shortening the service life. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a solenoid valve, a suspension system and a vehicle, which can solve the problems in the prior art that the solenoid valve has high noise during operation and high current required to maintain the valve open.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides a solenoid valve, comprising: a valve body assembly, the valve body assembly being provided with a valve port; a valve plug; a stationary iron core, the stationary iron core being fixedly arranged relative to the valve body assembly; a moving iron core, the moving iron core being movable between a first position and a second position, and when the moving iron core is in the first position, the moving iron core is separated from the stationary iron core, and the moving iron core drives the valve plug to block the valve port; when the moving iron core is in the second position, the moving iron core is in contact with the stationary iron core, and the moving iron core drives the valve plug to open the valve port; an elastic member, the elastic member pushes the moving iron core toward the first position; a buffer member, the buffer member being arranged between the stationary iron core and the moving iron core, and when the moving iron core is in the second position, the buffer member is in contact with both the stationary iron core and the moving iron core, and the buffer member is in an elastically compressed state; a driving assembly, the driving assembly being used to magnetize the stationary iron core and the moving iron core, so that the moving iron core has a tendency to move toward the second position under the action of the magnetic force.

[0008] In an embodiment of the present application, the moving iron core moves between a first position and a second position, thereby realizing the opening and closing of the valve plug to the valve port. The solenoid valve is a normally closed valve. In practical applications, the setting of the elastic member is used to push the moving iron core to drive the valve plug to close the valve port when the solenoid valve is in a closed valve state. The drive assembly can magnetize the static iron core and the moving iron core by obtaining electricity, and a magnetic force is generated between the moving iron core and the static iron core. The magnetic force overcomes the gravity of the moving iron core itself and the thrust of the elastic member, and realizes the movement of the moving iron core from the first position to the second position. Due to the movement of the moving iron core, the moving iron core will collide with the static iron core and cause noise. The setting of the buffer member is used to eliminate the noise between the moving iron core and the static iron core. Specifically, the buffer member is arranged between the moving iron core and the static iron core. In practical applications, the buffer member can be connected to the moving iron core or to the static iron core. This embodiment does not make any limitation to this. During the process of the moving iron core moving from the first position to the second position, the buffer contacts the static iron core before the moving iron core. As the moving iron core gradually moves, the gap between the moving iron core and the static iron core gradually decreases, and the buffer is deformed by force. When the moving iron core is in the second position, the buffer is compressed by force and is in an elastic compression state. At this time, the static iron core and the moving iron core are in contact to form a closed magnetic circuit. Compared with the situation where "there is a gap between the static iron core and the moving iron core", the static iron core and the moving iron core are in contact, and a small current can be passed through the electromagnetic coil of the driving component to keep the static iron core and the moving iron core in adsorption contact, and the solenoid valve is maintained in an open valve state, which effectively reduces the energy consumption and heat generation of the electromagnetic coil, keeps the solenoid valve in a low energy consumption and suitable working temperature for a long time, makes the overall movement of the solenoid valve more stable and reliable, and has the beneficial effect of extending the service life of the solenoid valve. In an embodiment of the present application, the buffer is an elastic material (such as rubber or other materials with elastic recovery ability). The setting of the buffer has the beneficial effect of avoiding noise generated by collision between the moving iron core and the stationary iron core. In the process of the moving iron core moving toward the second position, as the interval between the moving iron core and the stationary iron core becomes smaller, the elastic deformation of the buffer becomes greater, and the elastic recovery force generated becomes greater, thereby reducing the impact of the moving iron core toward the stationary iron core, so that the sound generated when the moving iron core and the stationary iron core contact is small, and the stationary iron core and the moving iron core contact to form a closed magnetic circuit, thereby having the beneficial effect of no longer requiring the drive component in the solenoid valve to provide a larger effective maintaining current to keep the solenoid valve in an open valve state.

[0009] Optionally, in an embodiment of the present application, the static iron core has a first end close to the moving iron core, and the moving iron core has a second end close to the static iron core, the first end is provided with a buffer groove, and the second end is provided with a mounting groove, the buffer groove and the mounting groove are correspondingly arranged along the axial direction of the solenoid valve, the buffer component is arranged in the mounting groove, and part of the buffer component protrudes from the mounting groove; the solenoid valve has an open valve state and a closed valve state, and when the solenoid valve is in the open valve state, the moving iron core is in the second position, the first end and the second end are abutted, and the buffer component is accommodated in the accommodation space enclosed by the buffer groove and the mounting groove.

[0010] Optionally, in an embodiment of the present application, the buffer member includes a first buffer portion and a second buffer portion, the first buffer portion is an annular structure arranged around the axial direction of the solenoid valve, the first buffer portion is clamped in the mounting groove, the second buffer portion is arranged on a side of the first buffer portion facing the static iron core, and the second buffer portion protrudes from the mounting groove; when the solenoid valve is in the valve opening state, the moving iron core is in the second position, and the second buffer portion abuts against the buffer groove.

[0011] Optionally, in an embodiment of the present application, there are multiple second buffer portions, and the multiple second buffer portions are evenly spaced and distributed on a surface of the first buffer portion facing the static iron core.

[0012] Optionally, in an embodiment of the present application, along the axial direction, from the static iron core to the moving iron core, the orthographic projection of the second buffer portion on the first buffer portion gradually increases.

[0013] Optionally, in an embodiment of the present application, the second buffer portion is a hemisphere, the second buffer portion includes a curved surface and a flat surface, the flat surface is connected to the first buffer portion, and the curved surface faces the first end.

[0014] Optionally, in an embodiment of the present application, a first elastic groove is opened at the first end along the axial direction of the solenoid valve, and a second elastic groove is opened at the second end along the axial direction of the solenoid valve, the first elastic groove and the second elastic groove are arranged correspondingly, and the two ends of the elastic member along the axial direction of the solenoid valve are respectively arranged in the first elastic groove and the second elastic groove; wherein, the buffer groove is opened on the periphery of the first elastic groove, and the installation groove is opened on the periphery of the second elastic groove.

[0015] Optionally, in an embodiment of the present application, the solenoid valve also includes: a core cover, which is fixedly connected to the valve body assembly, and the core cover and the valve body assembly form a movable cavity; the static iron core is fixedly connected to the end of the core cover away from the valve body assembly, and the moving iron core can move between the first position and the second position in the movable cavity.

[0016] Optionally, in an embodiment of the present application, the core cover includes a first connecting part and a second connecting part, the first connecting part is connected to the static iron core, and the second connecting part is connected to the valve body assembly; the second connecting part is provided with a plurality of through holes, and the plurality of through holes connect the active cavity and the external environment.

[0017] Optionally, in the embodiment of the present application, the buffer is made of rubber.

[0018] Optionally, in an embodiment of the present application, the height of the second buffer portion along the axial direction of the solenoid valve is H, and the depth of the buffer groove along the axial direction of the solenoid valve is h; wherein, 0.2mm≤H≤0.25mm, H-0.1≤h≤H-0.05.

[0019] In a second aspect, a suspension system is also provided, comprising the solenoid valve as described above.

[0020] In a third aspect, a vehicle is also provided, comprising the suspension system as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the solenoid valve in the closed valve state in the embodiment of the present application;

[0022] Figure 2 It is a structural schematic diagram of the solenoid valve in the embodiment of the present application switching from a closed valve state to an open valve state;

[0023] Figure 3 It is a structural schematic diagram of the solenoid valve in the embodiment of the present application in the valve opening state;

[0024] Figure 4 is a schematic diagram of the structure in which the buffer member in the embodiment of the present application is not squeezed;

[0025] Figure 5 is a schematic top view of the buffer member in the embodiment of the present application when it is not squeezed;

[0026] Figure 6 is a schematic cross-sectional view of a buffer member in an embodiment of the present application that is not squeezed;

[0027] Figure 7 is a schematic diagram of a structure in which a buffer member is squeezed in an embodiment of the present application;

[0028] Figure 8 is a schematic top view of a buffer being squeezed in an embodiment of the present application;

[0029] Fig. 9 is a schematic cross-sectional view of a buffer being squeezed in an embodiment of the present application;

[0030] Fig.10 is a schematic structural diagram of a moving iron core in an embodiment of the present application;

[0031] Fig.11 is a schematic diagram of another angle of the moving iron core in the embodiment of the present application;

[0032] Fig.12 is a schematic diagram of the cross-sectional structure of the moving iron core in an embodiment of the present application;

[0033] Fig.13 is a schematic structural diagram of a moving iron core and a buffer member in an embodiment of the present application;

[0034] Fig.14 is a schematic diagram of the cross-sectional structure of the moving iron core and the buffer member in the embodiment of the present application;

[0035] Fig.15 It is a schematic diagram of the structure of the core cover in the embodiment of the present application.

[0036] Description of reference numerals:

[0037] 1. Moving iron core; 11. Second end; 111. Mounting groove; 12. Second elastic groove; 2. Stationary iron core; 21. First end; 211. Buffer groove; 22. First elastic groove; 3. Buffer member; 31. First buffer portion; 32. Second buffer portion; 4. Elastic member; 5. Valve body assembly; 6. Core cover; 61. First connecting portion; 62. Second connecting portion; 621. Through hole. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0040] The solenoid valve, suspension system and vehicle provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0041] In practical applications, the solenoid valve is generally a normally closed valve. The solenoid valve is mainly used in the suspension system to connect and disconnect the air medium in the entire circulation channel. The driving component (the driving component includes an electromagnetic coil) in the solenoid valve magnetizes the static iron core 2 and the moving iron core 1 to make the moving iron core 1 move between the first position and the second position, thereby controlling the opening and closing of the solenoid valve.

[0042] See also Figures 1 to 15 , an embodiment of the present application provides a solenoid valve, comprising: a valve body assembly 5, the valve body assembly 5 is provided with a valve port; a valve plug; a stationary iron core 2, the stationary iron core 2 is fixedly arranged relative to the valve body assembly 5; a moving iron core 1, the moving iron core 1 can move between a first position and a second position, when the moving iron core 1 is in the first position, the moving iron core 1 is separated from the stationary iron core 2, and the moving iron core 1 drives the valve plug to block the valve port; when the moving iron core 1 is in the second position, the moving iron core 1 abuts against the stationary iron core 2, and the moving iron core 1 drives the valve plug to open the valve port; an elastic member 4, the elastic member 4 pushes the iron core 1 toward the first position; a buffer member 3, the buffer member 3 is arranged between the stationary iron core 2 and the moving iron core 1, when the moving iron core 1 is in the second position, the buffer member 3 abuts against both the stationary iron core 2 and the moving iron core 1, and the buffer member 3 is in an elastically compressed state; a driving assembly, the driving assembly is used to magnetize the stationary iron core 2 and the moving iron core 1, so that the moving iron core 1 has a tendency to move toward the second position under the action of the magnetic force.

[0043] In the embodiment of the present application, the moving iron core 1 moves between the first position and the second position, thereby realizing the opening and closing of the valve plug to the valve port. The solenoid valve is a normally closed valve. In practical applications, the setting of the elastic member 4 is used to push the moving iron core 1 to drive the valve plug to close the valve port when the solenoid valve is in a closed valve state. The drive assembly can magnetize the static iron core 2 and the moving iron core 1 by energizing, and a magnetic force is generated between the moving iron core 1 and the static iron core 2. The magnetic force overcomes the gravity of the moving iron core 1 itself and the thrust of the elastic member 4, so that the moving iron core 1 moves from the first position to the second position. Due to the movement of the moving iron core 1, the moving iron core 1 will collide with the static iron core 2 to cause noise, and the setting of the buffer member 3 is used to eliminate the noise between the moving iron core 1 and the static iron core 2. Specifically, the buffer member 3 is arranged between the moving iron core 1 and the static iron core 2. In practical applications, the buffer member 3 can be connected to the moving iron core 1 or the static iron core 2, and this embodiment does not make any limitation to this. During the movement of the moving iron core 1 from the first position to the second position, the buffer 3 contacts the static iron core 2 before the moving iron core 1. As the moving iron core 1 gradually moves, the gap between the moving iron core 1 and the static iron core 2 gradually decreases, and the buffer 3 is deformed by force. When the moving iron core 1 is in the second position, the buffer 3 is compressed by force and is in an elastic compression state. At this time, the static iron core 2 and the moving iron core 1 are in contact to form a closed magnetic circuit. Compared with the situation where "there is a gap between the static iron core 2 and the moving iron core 1", the static iron core 2 and the moving iron core 1 are in contact, and a small current can be passed through the electromagnetic coil of the driving component to keep the static iron core 2 and the moving iron core 1 in adsorption contact, and the solenoid valve is maintained in an open valve state, which effectively reduces the energy consumption and heat generation of the electromagnetic coil, keeps the solenoid valve in a low energy consumption and suitable working temperature for a long time, makes the overall movement of the solenoid valve more stable and reliable, and has the beneficial effect of extending the service life of the solenoid valve. In the embodiment of the present application, the buffer 3 is an elastic material (such as rubber or other materials with elastic recovery ability). The setting of the buffer 3 has the beneficial effect of avoiding the noise generated by the collision between the moving iron core 1 and the static iron core 2. In the process of the moving iron core 1 moving toward the second position, as the interval between the moving iron core 1 and the static iron core 2 becomes smaller, the elastic deformation of the buffer 3 becomes larger, and the elastic recovery force generated becomes larger, thereby reducing the impact of the moving iron core 1 toward the static iron core 2, so that the sound generated when the moving iron core 1 and the static iron core 2 contact is small, and the static iron core 2 and the moving iron core 1 contact to form a closed magnetic circuit, thereby having the beneficial effect of no longer requiring the drive component in the solenoid valve to provide a larger effective maintaining current to keep the solenoid valve in an open valve state.

[0044] Optionally, in an embodiment of the present application, the static iron core 2 has a first end 21 close to the moving iron core 1, and the moving iron core 1 has a second end 11 close to the static iron core 2. The first end 21 is provided with a buffer groove 211, and the second end 11 is provided with a mounting groove 111. The buffer groove 211 and the mounting groove 111 are correspondingly arranged along the axial direction of the solenoid valve, and the buffer component 3 is arranged in the mounting groove 111, and part of the buffer component 3 protrudes from the mounting groove 111; the solenoid valve has an open valve state and a closed valve state. When the solenoid valve is in the open valve state, the moving iron core 1 is in the second position, the first end 21 and the second end 11 are abutted, and the buffer component 3 is accommodated in the accommodation space enclosed by the buffer groove 211 and the mounting groove 111.

[0045] In the embodiment of the present application, the moving iron core 1 can move between the first position and the second position, thereby realizing the switching of the electromagnetic valve between the open valve state and the closed valve state. Specifically, the static iron core 2 and the moving iron core 1 are both arranged along the axis of the electromagnetic valve, and the first end 21 of the static iron core 2 and the second end 11 of the moving iron core 1 are arranged relatively. In the process of the moving iron core 1 moving between the first position and the second position, the first end 21 and the second end 11 are separated or abutted. Further, the first end 21 is provided with a buffer groove 211, and the second end 11 is provided with a mounting groove 111. The buffer groove 211 and the mounting groove 111 are arranged correspondingly. When the first end 21 and the second end 11 are abutted, the buffer groove 211 and the mounting groove 111 can form an accommodating space. The buffer member 3 is arranged in the mounting groove 111, and the buffer member 3 is arranged to absorb impact and reduce vibration, so as to prevent the first end 21 and the second end 11 from colliding and making noise. In actual application, when the solenoid valve switches from the closed valve state to the open valve state, the moving iron core 1 moves upward, and the distance between the first end 21 and the second end 11 gradually decreases, and the moving iron core 1 moves from separation to abutment. When the distance between the first end 21 and the second end 11 gradually decreases, the buffer 3 first contacts the static iron core 2 to avoid the first end 21 and the second end 11 from colliding and generating noise. The buffer 3 is compressed and deformed as the distance between the moving iron core 1 and the static iron core 2 decreases. When the first end 21 and the second end 11 abut, the accommodating space enclosed by the buffer groove 211 and the mounting groove 111 can completely accommodate the buffer 3, so that the first end 21 and the second end 11 are completely fitted and there is no gap. In the embodiment of the present application, since the setting of the buffer groove 211 and the installation groove 111 provides an accommodation space for the buffer member 3, the buffer member 3 will not occupy the space between the moving iron core 1 and the static iron core 2, and there is no longer a gap between the abutment between the first end 21 and the second end 11, and thus the driving component in the solenoid valve is no longer required to provide a larger effective maintaining current to keep the solenoid valve in an open valve state. Compared with the prior art, the solenoid valve in the embodiment of the present application can achieve a gapless abutment between the moving iron core 1 and the static iron core 2, thereby achieving the effect of reducing the effective maintaining current of the solenoid valve, which has the beneficial effect of reducing the energy consumption and heat generation of the driving component, allowing the solenoid valve to be in a low energy consumption and suitable working temperature for a long time, making the overall movement of the solenoid valve more stable and reliable, and extending the service life of the solenoid valve.It should be understood that the buffer member 3 is provided with an accommodation space by the arrangement of the buffer groove 211 and the mounting groove 111, so that the moving iron core 1 and the static iron core 2 are in contact with each other while reducing noise. This is only one embodiment of the present invention. In other embodiments, the buffer member 3 can be fixed on the moving iron core 1 or the static iron core 2, and a convex structure is formed on one of the moving iron core 1 and the static iron core 2, so that when the moving iron core 1 is in the second position, the moving iron core 1 and the static iron core 2 are abutted by the convex structure and the buffer member 3 is in an elastically compressed state (that is, in the moving iron core 1). During the movement of the core 1 toward the second position, the buffer 3 is first compressed, and then the protruding structure abuts against it). It is also possible to achieve contact between the moving core 1 and the stationary core 2 while reducing noise. For example, the buffer 3 is glued and fixed to the second end 11 of the moving core 1, and a protruding structure is formed on the second end 11 of the moving core 1. When the moving core 1 is toward the stationary core 2, the buffer 3 in a natural state protrudes from the protruding structure, so that during the movement of the moving core 1 toward the second position, the buffer 3 contacts the stationary core 2 before the protruding structure. As long as the moving core 1 contacts the stationary core 2 when in the second position, and the buffer 3 is compressed between the stationary core 2 and the moving core 1, the present invention does not limit the "fixing method of the buffer 3" and the "abutment structure between the moving core 1 and the stationary core 2".

[0046] Furthermore, since the first end 21 is provided with a buffer groove 211 that can accommodate the deformation of the buffer member 3, when the moving iron core 1 is in the second position, the deformed buffer member 3 will not occupy the gap between the moving iron core 1 and the static iron core 2, and the top plane of the moving iron core 1, that is, the plane of the second end 11, and the bottom plane of the static iron core 2, that is, the plane of the first end 21, are completely in contact with each other, so that the effective maintenance current required to keep the solenoid valve in an open state is minimized (the smaller the interval between the moving iron core 1 and the static iron core 2, the smaller the effective maintenance current required), effectively reducing the energy consumption and electrical heating of the driving components in the solenoid valve (the magnetic conductivity of a magnetic object will decrease with increasing temperature), allowing the solenoid valve to be in a low energy consumption and suitable working temperature for a long time, making the overall movement of the solenoid valve more stable and reliable, and the service life longer.

[0047] Optionally, in an embodiment of the present application, the buffer member 3 includes a first buffer portion 31 and a second buffer portion 32, the first buffer portion 31 is an annular structure arranged around the axial direction of the solenoid valve, the first buffer portion 31 is clamped in the mounting groove 111, and the second buffer portion 32 is arranged on the side of the first buffer portion 31 facing the static iron core 2, and the second buffer portion 32 protrudes from the mounting groove 111; when the solenoid valve is in an open valve state, the moving iron core 1 is in the second position, and the second buffer portion 32 abuts against the buffer groove 211.

[0048] In the embodiment of the present application, the first buffer portion 31 is provided for deforming under force to absorb impact and reduce vibration, and also for providing a location for the second buffer portion 32. Specifically, the first buffer portion 31 is clamped in the mounting groove 111, and the first buffer portion 31 is an annular structure. In practical applications, when the first end 21 and the second end 11 collide with each other, the first buffer portion 31 with an annular structure can absorb the collision and reduce noise in the direction surrounding the axial direction of the solenoid valve. The second buffer portion 32 protrudes from the first buffer portion 31, and the second buffer portion 32 is arranged on the side of the first buffer portion 31 facing the static iron core 2. In practical applications, in the process of gradually decreasing the distance between the first end 21 and the second end 11, the second buffer portion 32 contacts the first end 21 before the moving iron core 1 and the first buffer portion 31. As the distance between the first end 21 and the second end 11 gradually decreases, the second buffer portion 32 is squeezed and deformed by the buffer groove 211 gradually increases until the first end 21 and the second end 11 fit together, and the second buffer member 3 is completely accommodated in the accommodation space formed by the buffer groove 211 and the installation groove 111. In practical applications, when the drive assembly is energized, an electromagnetic force is generated between the static iron core 2 and the moving iron core 1. When the electromagnetic force is sufficient to overcome the thrust of the elastic member 4 in the solenoid valve and the gravity of the moving iron core 1 itself, the moving iron core 1 moves upward under the action of the electromagnetic force. The process of switching the solenoid valve from the closed state to the open state when it is energized is the process of the moving iron core moving from the first position to the second position, which can be regarded as the process of the moving iron core 1 moving upward (the total stroke is X). Figure 1 and Figure 2 As shown, it can be divided into two stages. The first stage is the pre-compression stage of the buffer 3, and this stage starts from the movement of the moving iron core 1 until the second buffer portion 32 just contacts the static iron core 2 (that is, the buffer groove 211); the second stage is the buffer stage, and this stage starts from the movement of the second buffer portion 32 just contacts the static iron core 2 (that is, the buffer groove 211) until the moving iron core 1 and the static iron core 2 are completely attracted (the compression stage stroke is H).

[0049] Optionally, in the embodiment of the present application, there are multiple second buffer portions 32 , and the multiple second buffer portions 32 are evenly spaced and distributed on a surface of the first buffer portion 31 facing the static iron core 2 .

[0050] In the embodiment of the present application, the number of the second buffer portions 32 may be 4, 5, or 6, and this embodiment does not impose any limitation on this. Specifically, the intervals between two adjacent second buffer portions 32 are the same, and when the first end 21 and the second end 11 abut, each second buffer portion 32 absorbs the collision force as equally and evenly as possible, which has the beneficial effect. Furthermore, when the second buffer portion 32 is squeezed by force along the axial direction of the solenoid valve, the second buffer portion 32 is deformed, the second buffer portion 32 is compressed along the axial direction of the solenoid valve, and expands along its own circumferential direction. The interval between two adjacent second buffer portions 32 can be used to accommodate the expansion volume of the second buffer portion 32 after deformation and expansion, which has the beneficial effect of preventing the expansion volume of the second buffer portion 32 from squeezing into the contact surface between the first end 21 and the second end 11, resulting in a gap between the first end 21 and the second end 11.

[0051] Optionally, in the embodiment of the present application, along the axial direction, from the static iron core 2 to the movable iron core 1 , the orthographic projection of the second buffer portion 32 on the first buffer portion 31 gradually increases.

[0052] In the embodiment of the present application, in the process of switching the solenoid valve from the closed valve state to the open valve state, the moving iron core 1 moves from the first position to the second position. It can be understood that the moving iron core 1 moves upward, and as the distance between the moving iron core 1 and the static iron core 2 becomes closer, the electromagnetic force between the moving iron core 1 and the static iron core 2 will increase geometrically. In the process of the second buffer portion 32 contacting the static iron core 2, since the positive projection of the second buffer portion 32 on the first buffer portion 31 gradually increases, as the compression amount of the second buffer member 3 increases, the contact area between the second buffer surface and the buffer groove 211 also increases geometrically. Then, the buffering force provided by the second buffer portion 32 will also continue to increase geometrically, which can effectively suppress the impact speed and impact force when the moving iron core 1 collides with the static iron core 2. Since the impact kinetic energy is effectively absorbed by the second buffer portion 32, it has the beneficial effect of reducing the impact noise when the moving iron core 1 contacts the static iron core 2.

[0053] Specifically, the second buffer portion 32 may be hemispherical, wherein the hemispherical plane is connected to the first buffer portion 31, and the hemispherical curved surface faces the first end 21. The second buffer portion 32 may also be conical, wherein the conical plane is connected to the first buffer portion 31, and the conical surface faces the first end 21.

[0054] Optionally, in the embodiment of the present application, the second buffer portion 32 is a hemisphere, and the second buffer portion 32 includes a curved surface and a flat surface, the flat surface is connected to the first buffer portion 31 , and the curved surface faces the first end 21 .

[0055] In practical applications, the second buffer part 32 can be a hemisphere, specifically, the hemisphere includes a curved surface and a flat surface, wherein the flat surface is connected to the first buffer part 31, and the curved surface faces the first end 21. In the process of opening the solenoid valve, the moving iron core 1 moves upward, and as the distance between the moving iron core 1 and the static iron core 2 becomes closer, the electromagnetic force between the moving iron core 1 and the static iron core 2 will increase geometrically, and in the process of the second buffer part 32 contacting the static iron core 2, the curved surface first contacts the first end 21, and as the compression amount of the second buffer 3 increases, the curved surface of the hemisphere is gradually compressed, and the contact area between the curved surface and the buffer groove 211 also increases geometrically, so the buffering force provided by the hemisphere will also increase geometrically, which can effectively suppress the impact speed and impact force when the moving iron core 1 collides with the static iron core 2. Since the impact kinetic energy is effectively absorbed by the second buffer part 32, it has the beneficial effect of reducing the impact noise when the moving iron core 1 contacts the static iron core 2.

[0056] Optionally, in the embodiment of the present application, the solenoid valve also includes an elastic member 4; a first elastic groove 22 is opened at the first end 21 along the axial direction of the solenoid valve, and a second elastic groove 12 is opened at the second end 11 along the axial direction of the solenoid valve, the first elastic groove 22 and the second elastic groove 12 are arranged correspondingly, and the two ends of the elastic member 4 along the axial direction of the solenoid valve are respectively arranged in the first elastic groove 22 and the second elastic groove 12; wherein, the buffer groove 211 is opened on the periphery of the first elastic groove 22, and the mounting groove 111 is opened on the periphery of the second elastic groove 12.

[0057] In the embodiment of the present application, the setting of the elastic member 4 is used to maintain the closed valve state of the electromagnetic valve. In practical applications, the electromagnetic valve is a normally closed valve. When the electromagnetic coil in the electromagnetic valve loses power, there is no electromagnetic force between the static iron core 2 and the moving iron core 1. Under the thrust of the elastic member 4 and the gravity of the moving iron core 1 itself, the valve plug tightly contacts the valve port to form a seal. At this time, the electromagnetic valve is in a closed state, and the air medium cannot flow out of the valve port. Specifically, the setting of the first elastic groove 22 and the second elastic groove 12 is used to provide a placement space for the elastic member 4 on the one hand, and also guides the movement of the elastic member 4 on the other hand, which has the beneficial effect of preventing the elastic member 4 from popping out or tilting during the movement to affect the operation of the electromagnetic valve.

[0058] Optionally, in an embodiment of the present application, the solenoid valve also includes: a core cover 6, which is fixedly connected to the valve body assembly 5, and the core cover 6 and the valve body assembly 5 form a movable cavity; the static iron core 2 is fixedly connected to the end of the core cover 6 away from the valve body assembly 5, and the moving iron core 1 can move between a first position and a second position in the movable cavity to realize the switching of the solenoid valve between an open valve state and a closed valve state.

[0059] In the embodiment of the present application, the valve body assembly 5 and the core cover 6 are arranged to form an active cavity. In practical applications, the static core 2 is fixedly connected to the end of the core cover 6 away from the valve port, and the moving core 1 can be movable between the first position and the second position in the active cavity, thereby realizing the switching of the solenoid valve between the open valve state and the closed valve state. Specifically, the solenoid valve is a normally closed valve. When the drive assembly loses power, there is no electromagnetic force between the static core 2 and the moving core 1 assembly. Under the thrust of the spring and the gravity of the moving core 1 assembly itself, the valve plug at the bottom of the moving core 1 tightly contacts the valve port to form a seal. At this time, the solenoid valve is in a closed state, and the air medium cannot flow out from the channel outlet of the valve body assembly 5. Furthermore, the valve body assembly 5 also has a first channel and a second channel. When the electromagnetic coil is energized, an electromagnetic force is generated between the static iron core 2 and the moving iron core 1. When the electromagnetic force is sufficient to overcome the thrust of the spring and the gravity of the moving iron core 1 assembly itself, the moving iron core 1 assembly will move upward under the action of the electromagnetic force. At this time, the first channel and the second channel form a flow passage, and a large amount of air medium flows out from the second channel outlet of the valve body assembly 5. The process of the electromagnetic valve switching from the closed valve state to the open valve state can be regarded as the process of the moving iron core 1 moving upward, and the above-mentioned movement process of the moving iron core 1 is completed in the active cavity.

[0060] Furthermore, the valve body assembly 5 is a rotating body structure, and its upper outer wall is press-fitted with the core cover 6 and then laser welded and sealed. The outer wall is also provided with a sealing ring reserved groove for installing the sealing ring. The valve body assembly 5 is provided with a second channel medium outlet, which can tightly contact the valve plug to form a seal.

[0061] Furthermore, the core cover 6 is a hollow structure, and the inner sides of the upper and lower ends are respectively interference fit with the static iron core 2 and the valve body assembly 5 and then laser welded and sealed to form a valve cavity. The side of the middle step on the outer side is laser welded and fixed to the fixed seat. The lower part of the outer side is provided with a plurality of through holes 621 as the entrance of the first channel. The middle part of the inner side is a straight tube structure, which is gap-fitted with the upper outer side of the moving iron core 1 to form a guide for the up and down movement of the moving iron core 1 assembly.

[0062] Optionally, in the embodiment of the present application, the core cover 6 includes a first connecting part 61 and a second connecting part 62, the first connecting part 61 is connected to the static iron core 2, and the second connecting part 62 is connected to the valve body assembly 5; the second connecting part 62 is provided with a plurality of through holes 621, and the plurality of through holes 621 connect the active cavity and the external environment.

[0063] In the embodiment of the present application, the first connection portion 61 is used to fix the static iron core 2 so that the static iron core 2 is in a fixed position. When the moving iron core 1 moves between the first position and the second position, the distance between the static iron core 2 and the moving iron core 1 increases or decreases. The second connection portion 62 is used to connect the valve body assembly 5, and the second connection portion 62 is provided with a plurality of through holes 621. The through holes 621 are used to connect the active cavity and the external environment. When the solenoid valve switches from a closed state to an open state, the moving iron core 1 assembly moves upward under the action of the electromagnetic force. At this time, the first channel and the second channel form a flow passage, and a large amount of air medium flows out from the second channel outlet of the valve seat.

[0064] Optionally, the buffer member 3 is made of rubber.

[0065] In the embodiment of the present application, the rubber buffer has a certain deformation capacity. In actual application, the rubber material is compressed and deformed to avoid the static iron core 2 and the moving iron core 1 from colliding and generating noise.

[0066] Specifically, the material of the buffer may be EPDM (ethylene propylene diene monomer rubber), HMBR (hydrogenated nitrile butadiene rubber), or MBR (nitrile butadiene rubber), and this embodiment does not impose any limitation on this.

[0067] Optionally, the height of the second buffer portion 32 along the axial direction of the solenoid valve is H, and the depth of the buffer groove 211 along the axial direction of the solenoid valve is h; wherein, 0.2mm≤H≤0.25mm, H-0.1mm≤h≤H-0.05mm.

[0068] In the embodiment of the present application, the height H of the second buffer portion 32 is slightly greater than the depth h of the buffer groove 211. Specifically, when the second buffer portion 32 is not squeezed, that is, when the second buffer portion 32 just contacts the buffer groove 211, the second buffer portion 32 may protrude from the buffer groove 211. At this time, there is a certain gap between the first end 21 and the second end 11. When the second buffer portion 32 is squeezed by force, the second buffer portion 32 may be accommodated by the buffer groove 211. In the embodiment of the present application, when the height of the second buffer portion 32 is less than 0.2mm, it is difficult to achieve the effect of eliminating noise. When it is greater than 0.25, it is necessary to drive the component to provide a larger effective maintaining current. In addition, the height H of the second buffer portion 32 is positively correlated with the depth h of the buffer groove 211. Specifically, the depth h of the buffer groove 211 can fully accommodate the second buffer portion 32 when the second buffer portion 32 is under extreme compression. Therefore, the depth h of the buffer groove 211 is slightly smaller than the height of the second buffer portion 32. It can be understood that the difference between the depth h of the buffer groove 211 and the height H of the second buffer portion 32 can be the limit deformation of the second buffer portion 32. Furthermore, the depth h of the buffer groove 211 is greater than or equal to H-0.1mm and less than or equal to H-0.05mm.

[0069] In practical applications, the depth h of the buffer groove 211 and the height H of the second buffer portion can be determined according to actual conditions, and this embodiment does not impose too many restrictions on this.

[0070] Optionally, a suspension system is also provided in an embodiment of the present application, comprising the solenoid valve as described above.

[0071] In an embodiment of the present application, the suspension system includes a solenoid valve. The suspension system with the solenoid valve as described above has a buffer groove 211 and a mounting groove 111 correspondingly arranged, and the buffer member 3 can be accommodated in the accommodation space enclosed by the buffer groove 211 and the mounting groove 111 when the first end 21 and the second end 11 are in contact. Therefore, the buffer member 3 will not occupy the space between the moving iron core 1 and the static iron core 2, and the driving component in the solenoid valve is no longer required to provide a larger effective maintenance current to keep the solenoid valve in an open valve state, which has the beneficial effect of reducing the energy consumption and heat generation of the driving component, allowing the solenoid valve to be in a low energy consumption and suitable working temperature for a long time, making the overall movement of the solenoid valve more stable and reliable, and extending the service life of the solenoid valve.

[0072] Optionally, in an embodiment of the present application, a vehicle comprises the suspension system as described above.

[0073] In the embodiment of the present application, since the vehicle includes the suspension system as described above, it also has all the characteristics and beneficial effects of the above-mentioned suspension system, and this embodiment will not be described in detail here.

[0074] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0075] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A solenoid valve, characterized in that: include: A valve body assembly (5), wherein the valve body assembly is provided with a valve port; Valve plug; A static iron core (2), the static iron core (2) being fixedly arranged relative to the valve body assembly; A moving iron core (1), the moving iron core (1) being movable between a first position and a second position; when the moving iron core (1) is in the first position, the moving iron core (1) is separated from the static iron core (2), and the moving iron core (1) drives the valve plug to seal the valve port; when the moving iron core (1) is in the second position, the moving iron core (1) is in contact with the static iron core (2), and the moving iron core (1) drives the valve plug to open the valve port; An elastic member (4), the elastic member (4) pushing the moving iron core (1) towards the first position; a buffer member (3), the buffer member (3) being arranged between the static iron core (2) and the moving iron core (1); when the moving iron core (1) is in the second position, the buffer member (3) is in contact with both the static iron core (2) and the moving iron core (1), and the buffer member (3) is in an elastically compressed state; a driving component, the driving component being used to magnetize the stationary iron core (2) and the moving iron core (1), so that the moving iron core (1) has a tendency to move towards the second position under the action of magnetic force; The static iron core (2) has a first end (21) close to the moving iron core (1), the moving iron core (1) has a second end (11) close to the static iron core (2), the first end (21) is provided with a buffer groove (211), the second end (11) is provided with a mounting groove (111), the buffer groove (211) and the mounting groove (111) are arranged correspondingly along the axial direction of the solenoid valve, the buffer component (3) is arranged in the mounting groove (111), and a part of the buffer component (3) protrudes from the mounting groove (111); the buffer component (3) comprises a first buffer portion (31) and a second buffer portion (32), the first buffer portion (31) and the second buffer portion (32) being provided with a buffer groove (211) and a mounting groove (1 ... The punching portion (31) is an annular structure arranged around the axial direction of the solenoid valve; the second buffer portion (32) is arranged on a side of the first buffer portion (31) facing the static iron core (2), and the second buffer portion (32) protrudes from the mounting groove (111); there are a plurality of second buffer portions (32), and the plurality of second buffer portions (32) are evenly spaced and distributed on a side of the first buffer portion (31) facing the static iron core (2); the second buffer portion (32) is a hemispherical body, and the second buffer portion (32) comprises a curved surface and a flat surface, the flat surface is connected to the first buffer portion (31), and the curved surface faces the first end (21); The solenoid valve has an open valve state and a closed valve state. When the solenoid valve is in the open valve state, the moving iron core (1) is in the second position, and the second buffer portion (32) abuts against the buffer groove (211).

2. The solenoid valve according to claim 1, characterized in that: When the solenoid valve is in the valve-opening state, the moving iron core (1) is in the second position, the first end (21) and the second end (11) are in contact with each other, and the buffer member (3) is accommodated in an accommodation space enclosed by the buffer groove (211) and the mounting groove (111).

3. The solenoid valve according to claim 2, characterized in that: The first buffer portion (31) is snap-connected to the mounting groove (111).

4. The solenoid valve according to claim 3, characterized in that: Along the axial direction, from the static iron core (2) to the moving iron core (1), the orthographic projection of the second buffer portion (32) on the first buffer portion (31) gradually increases.

5. The solenoid valve according to claim 2, characterized in that: The first end (21) is provided with a first elastic groove (22) along the axial direction of the solenoid valve, the second end (11) is provided with a second elastic groove (12) along the axial direction of the solenoid valve, the first elastic groove (22) and the second elastic groove (12) are arranged correspondingly, and the two ends of the elastic member (4) along the axial direction of the solenoid valve are respectively arranged in the first elastic groove (22) and the second elastic groove (12); Wherein, the buffer groove (211) is opened at the periphery of the first elastic groove (22), and the mounting groove (111) is opened at the periphery of the second elastic groove (12).

6. The solenoid valve according to any one of claims 1 to 4, characterized in that: The solenoid valve further comprises: An iron core cover (6), the iron core cover (6) and the valve body assembly (5) are fixedly connected, and the iron core cover (6) and the valve body assembly (5) form a movable cavity; The static iron core (2) is fixedly connected to the end of the iron core cover (6) away from the valve body assembly (5), and the movable iron core (1) can move between the first position and the second position in the movable cavity.

7. The solenoid valve according to claim 6, characterized in that: The iron core cover (6) comprises a first connecting portion (61) and a second connecting portion (62), the first connecting portion (61) being connected to the static iron core (2), and the second connecting portion (62) being connected to the valve body assembly (5); The second connection portion (62) is provided with a plurality of through holes (621), and the plurality of through holes (621) connect the active cavity with the external environment.

8. The solenoid valve according to claim 1, characterized in that: The buffer component (3) is made of rubber.

9. The solenoid valve according to claim 3, characterized in that: The height of the second buffer portion (32) along the axial direction of the solenoid valve is H, and the depth of the buffer groove (211) along the axial direction of the solenoid valve is h; Among them, 0.2mm≤H≤0.25mm, H-0.1mm≤h≤H-0.05mm.

10. A suspension system, characterized in that: Comprising a solenoid valve as claimed in any one of claims 1 to 9.

11. A vehicle, characterized in that: Comprising the suspension system of claim 10.

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