Electromagnetic valve, air spring, air suspension and vehicle

Abstract

The utility model relates to an electromagnetic valve, an air spring, an air suspension and a vehicle. The electromagnetic valve comprises a valve body, a valve port and a plug, wherein the valve body and the valve port are fixed in a spaced mode, and the plug is arranged between the valve body and the valve port and can move in a reciprocating mode to open or close the valve port. The electromagnetic valve further comprises a damping spring, the damping spring is located between the valve body and the plug, and the damping spring is used for reducing impact in the process that the plug slides towards the valve body. According to the electromagnetic valve, the damping spring is arranged between the valve body and the plug, so that when the plug slides towards the valve body, the impact of the plug on the valve body is absorbed through the damping spring, noise generated in the valve opening process of the electromagnetic valve is reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the field of solenoid valves, and in particular to a solenoid valve, an air spring, an air suspension and a vehicle. Background Art

[0002] In the prior art, the plug may impact the valve body when moving toward the valve body, thereby generating noise and affecting the user's experience. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of this application is to provide a solenoid valve that can reduce noise. Specifically, the technical solution includes the following:

[0004] In a first aspect, an embodiment of the present application provides a solenoid valve, comprising a valve body and a valve port fixedly spaced apart, and a plug disposed between the valve body and the valve port, wherein the plug can reciprocate to open or close the valve port;

[0005] The solenoid valve also includes a shock-absorbing spring, which is located between the valve body and the plug. The shock-absorbing spring is used to reduce the impact of the plug sliding toward the valve body.

[0006] The solenoid valve of the present application is provided with a shock-absorbing spring between the valve body and the plug, so that when the plug slides toward the valve body, the shock-absorbing spring absorbs the impact of the plug on the valve body, thereby reducing the noise during the opening process of the solenoid valve of the present application and improving the user experience.

[0007] In one embodiment, the inner diameter of the spring coil of the damping spring gradually increases along the direction from the valve body toward the valve port.

[0008] In one embodiment, of two adjacent spring coils of the damping spring, the outer diameter of the spring coil away from the valve port is smaller than or equal to the inner diameter of the spring coil close to the valve port.

[0009] In one embodiment, the axes of each coil of the damping spring coincide.

[0010] In one embodiment, along the direction from the valve body toward the valve port, the pitch between two adjacent spring coils of the damping spring gradually decreases.

[0011] In one embodiment, the damping spring is fixedly connected to the plug and / or the valve body.

[0012] In one embodiment, the solenoid valve further includes an iron core and a guide rod, two ends of the guide rod are fixedly connected to the iron core and the plug respectively, and the iron core can slide and drive the plug to reciprocate through the guide rod.

[0013] In one embodiment, the valve body includes a fixedly connected shell and an isolating member, the iron core, the isolating member and the plug are all arranged in the shell, along the length direction of the guide rod, the isolating member is arranged between the iron core and the plug, and a guide hole is provided on the isolating member to allow the guide rod to pass through.

[0014] In one embodiment, the valve body further includes an elastic member, which is located between the isolation member and the iron core, and is used to push the iron core to slide and drive the plug to move through the guide rod.

[0015] In one embodiment, the elastic member is a variable-distance spring.

[0016] In one embodiment, along the direction from the core toward the isolating element, the pitch between two adjacent spring coils of the elastic element gradually decreases.

[0017] In a second aspect, an embodiment of the present application provides an air spring, comprising a main air chamber, an auxiliary air chamber and the solenoid valve of the first aspect of the present application, wherein the solenoid valve is used to control the on-off connection between the main air chamber and the auxiliary air chamber.

[0018] In a third aspect, an embodiment of the present application provides an air suspension, comprising the air spring of the second aspect of the present application or the solenoid valve of the first aspect of the present application.

[0019] In a fourth aspect, an embodiment of the present application provides a vehicle, comprising the air suspension of the third aspect of the present application or the air spring of the second aspect of the present application or the solenoid valve of the first aspect of the present application.

[0020] It can be understood that the air springs, air suspensions, and vehicles provided in the second to fourth aspects of the present application all have the effect of reducing noise due to the use of the solenoid valve provided in the first aspect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a solenoid valve provided in one embodiment of the present application;

[0022] Figure 2 A schematic cross-sectional structure diagram of a solenoid valve provided in one embodiment of the present application;

[0023] Figure 3 This is an exploded schematic diagram of a solenoid valve provided in one embodiment of the present application;

[0024] Figure 4 This is a structural schematic diagram of a solenoid valve provided in an embodiment of the present application when in a valve-opening state;

[0025] Figure 5 This is a structural schematic diagram of a solenoid valve provided in an embodiment of the present application when in a valve closing state;

[0026] Figure 6 A schematic diagram of a partial structure of a solenoid valve provided in one embodiment of the present application;

[0027] Figure 7 This is a schematic diagram of the structure of a shock absorbing spring provided in one embodiment of the present application;

[0028] Figure 8 A schematic cross-sectional structure diagram of a shock absorbing spring provided in one embodiment of the present application;

[0029] Fig. 9 A schematic diagram of the top view of a shock absorbing spring provided in one embodiment of the present application;

[0030] Fig.10 Another structural schematic diagram of a solenoid valve provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0032] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The serial numbers for the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present application, unless otherwise specified, include direct and indirect connections (couplings). The directional terms mentioned in the present application, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0033] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including", "may include", "include", or "may include" used in this application indicate the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit one or more other functions, operations, elements, etc. In addition, the terms "including" or "include" indicate the existence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and do not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0035] See also Figure 1 The structure diagram of the solenoid valve 100 provided in one embodiment of the present application is shown in FIG. Figure 2 The cross-sectional structure diagram of the solenoid valve 100 provided in one embodiment of the present application is shown in FIG. Figure 3 FIG. 1 is a schematic diagram of an exploded view of a solenoid valve 100 provided in one embodiment of the present application. For ease of description, Figure 3 Some structures are omitted.

[0036] like Figure 1-Figure 3 As shown, the solenoid valve 100 of the present application includes a valve body 10 and a valve seat 20, and a valve port 21 and a communication port 22 are provided in the valve seat 20. The valve port 21 is used to communicate with an external first pipeline, and the communication port 22 is used to communicate with an external second pipeline. When the solenoid valve 100 of the present application is in an open valve state, the fluid flowing from the first pipeline can flow into the valve port 21 and flow into the second pipeline from the communication port 22. When the solenoid valve 100 of the present application is in a closed valve state, the solenoid valve 100 of the present application can block the fluid flow between the first pipeline and the second pipeline.

[0037] Specifically, the solenoid valve 100 of the present application further includes a valve core 30 and a coil 40. The valve core 30 and the coil 40 are both accommodated in the inner cavity 10a of the valve body 10, and the valve core 30 is slidably connected to the valve body 10, and the coil 40 is sleeved on the outer side of the valve core 30 and communicated with the external circuit.

[0038] When the coil 40 is energized, the coil 40 can generate a magnetic field, and the magnetic induction lines in the magnetic field can pass through the valve core 30 and magnetize the valve core 30, so that an electromagnetic force can be generated between the valve core 30 and the coil 40 to drive the valve core 30 to move relative to the coil 40. Figure 4 As shown, before the coil 40 is energized, the solenoid valve 100 is in a normally open state. Along the axial direction of the coil 40, the valve core 30 and the valve seat 20 are spaced apart from each other, so that the fluid flowing into the valve port 21 from the external first pipeline can flow into the communication port 22 through the gap between the valve core 30 and the valve seat 20, and flow into the second pipeline from the communication port 22, thereby realizing the valve opening function of the solenoid valve 100 of the present application.

[0039] When the coil 40 is energized, the electromagnetic force generated by the coil 40 acts on the valve core 30, causing the valve core 30 to slide along the axial direction of the coil 40 toward the valve port 21. Figure 5 As shown, when the end of the valve core 30 facing the valve port 21 abuts against the surface of the valve seat 20 provided with the valve port 21, the valve core 30 shields the valve port 21, so that the fluid in the external first pipeline cannot pass through the valve core 30 and the connecting port 22 to achieve connection with the second pipeline, thereby realizing the valve closing function of the solenoid valve 100 of the present application.

[0040] It is understandable that in other embodiments, the solenoid valve 100 of the present application can also adjust the winding direction or the energizing direction of the coil 40 and the setting position of the corresponding structure so that the solenoid valve 100 is in a normally closed state before the coil 40 is energized. When the coil 40 is energized, the valve core 30 slides in a direction away from the valve port 21 under the action of the electromagnetic force to open the valve port 21 and realize valve opening.

[0041] For ease of description, the solenoid valve 100 of the present application is in a normally open state before the coil 40 is energized. After the coil 40 is energized, the valve core 30 can slide toward the valve port 21 to close the valve port 21, thereby closing the solenoid valve 100 of the present application.

[0042] See also Figure 6 The partial structural diagram of the solenoid valve 100 provided in one embodiment of the present application is shown in FIG. Figure 1-Figure 5 .

[0043] like Figure 1-Figure 6As shown, the valve core 30 includes a plug 31 and a guide rod 32, the plug 31 is arranged between the valve body 10 and the valve port 21, the guide rod 32 is fixed to the end of the plug 31 facing the valve body 10, and the guide rod 32 can extend into the inner cavity 10a of the valve body 10 and is slidably connected with the valve body 10. The guide rod 32 slides in the inner cavity 10a to drive the plug 31 to reciprocate to open or close the valve port 21.

[0044] The solenoid valve 100 of the present application further includes a damping spring 50, which is located between the valve body 10 and the plug 31 along the length direction of the guide rod 32. Figure 6 As shown, the damping spring 50 is fixedly connected to the plug 31. When the coil 40 is switched from the energized state to the de-energized state, the plug 31 can slide in a direction away from the valve port 21 while also moving toward the isolation member 12. It can be understood that the setting of the damping spring 50 can also absorb the impact of the plug 31 on the isolation member 12 when it moves toward the isolation member 12, thereby reducing the noise during the valve opening process of the solenoid valve 100 of the present application and improving the user experience.

[0045] On the other hand, when the coil 40 is energized, the plug 31 may vibrate along the length direction of the guide rod 32 while contacting the valve port 21. This vibration will cause the plug 31 to slide away from the valve port 21, thereby compressing the shock-absorbing spring 50. The shock-absorbing spring 50 absorbs the impact when the plug 31 contacts the valve port 21, reduces further damage to the valve seat 20 caused by the impact, and reduces the valve closing noise.

[0046] Therefore, the solenoid valve 100 of the present application sets a shock-absorbing spring 50 between the valve body 10 and the plug 31, so that when the plug 31 slides toward the valve body 10, the shock-absorbing spring 50 absorbs the impact of the plug 31 on the valve body 10, thereby reducing the noise during the opening process of the solenoid valve 100 of the present application and improving the user experience.

[0047] See also Figure 7 The structure diagram of the shock absorbing spring 50 provided in one embodiment of the present application is shown in FIG. Figure 2 and Figure 6 .

[0048] like Figure 2 , Figure 6 and Figure 7As shown, the inner diameter of the spring coil of the shock-absorbing spring 50 gradually increases along the direction from the valve body 10 to the valve port 21. Since the inner diameter of the spring coil of the spring is related to the elastic properties of the spring, the larger the inner diameter of the spring coil, the smaller the elastic coefficient, and the smaller the inner diameter of the spring coil, the larger the elastic coefficient. In addition, when the coil 40 switches from the energized state to the de-energized state, the plug 31 will slide in the direction away from the valve port 21. It can be understood that the provision of the shock-absorbing spring 50 with a gradually increasing inner diameter of the spring coil can make the elastic force from the shock-absorbing spring 50 received by the solenoid valve 100 of the present application during the valve opening process gradually increase, thereby improving the valve opening efficiency of the solenoid valve 100 of the present application.

[0049] At the same time, based on the fact that the solenoid valve 100 is actually opening the valve, a certain valve opening stroke needs to be ensured to ensure the opening degree of the solenoid valve 100. It can be understood that the damping spring 50 with a gradually increasing inner diameter of the spring coil can reduce the space occupied by the damping spring 50 when it is compressed while ensuring the damping spring 50's effect of absorbing the impact between the plug 31 and the valve body 10, thereby reducing the influence of the damping spring 50 on the valve opening stroke in the length direction of the guide rod 32.

[0050] At the same time, the solenoid valve 100 of the present application also allows the inner diameter of the spring coil of the shock-absorbing spring 50 to gradually increase along the direction of the valve body 10 toward the valve port 21, so as to reduce the influence of the space after the shock-absorbing spring 50 is compressed and deformed on the valve opening stroke during the valve opening process of the solenoid valve 100 of the present application, thereby ensuring the valve opening effect of the solenoid valve 100 of the present application.

[0051] In the embodiment of the present application, a coil of a spring can be understood as a spring structure corresponding to a 360° rotation of the spring along its own axis.

[0052] See also Figure 8 The cross-sectional structure diagram of the shock absorbing spring 50 provided in one embodiment of the present application is shown in FIG. Fig. 9 The schematic diagram of the top view of the shock absorbing spring 50 provided in one embodiment of the present application is shown in FIG. Figure 2 , Figure 6 and Figure 7 .

[0053] like Figure 2 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, along the length direction of the guide rod 32 , of the two adjacent spring coils of the damping spring 50 , the outer diameter of the spring coil away from the valve port 21 is smaller than the inner diameter of the spring coil close to the valve port 21 .

[0054] Based on the fact that the direction of the pressure to which the shock absorbing spring 50 is subjected in the actual working process is the length direction of the guide rod 32. It can be understood that when the plug 31 slides toward the valve body 10, any two adjacent coils of the shock absorbing spring 50 satisfy the following conditions: the outer diameter of the coil away from the valve port 21 is smaller than the inner diameter of the coil close to the valve port 21, so that the shock absorbing spring 50 can reduce the mutual contact of adjacent coils during compression, and while ensuring the shock absorbing function of the shock absorbing spring 50, further reduce the space occupied by the compressed shock absorbing spring 50 along the length direction of the guide rod 32, further reduce the influence of the shock absorbing spring 50 on the valve opening stroke, and further ensure the valve opening effect of the solenoid valve 100 of the present application.

[0055] It is understandable that in another embodiment, along the length direction of the guide rod 32, the outer diameter of the spring coil away from the valve port 21 of two adjacent spring coils of the damping spring 50 may be equal to the inner diameter of the spring coil close to the valve port 21. The present application does not impose any particular limitation on this.

[0056] In one embodiment, if Figure 6-Figure 8 As shown, along the length direction of the guide rod 32, the axis of each coil of the shock-absorbing spring 50 is overlapped, and the shock-absorbing spring 50 is sleeved on the guide rod 32. It can be understood that arranging the axis of each coil of the shock-absorbing spring 50 to overlap can ensure that when the plug 31 slides toward the valve body 10, the elastic force provided by each area of ​​the shock-absorbing spring 50 is uniform, and the shock-absorbing spring 50 further improves the impact absorption effect of the shock-absorbing spring 50 on the plug 31 and the valve body 10, further reduces the noise generated by the solenoid valve 100 of the present application during the valve closing process, and further improves the user experience.

[0057] In one embodiment, if Figure 6-Figure 8 As shown, the pitch between two adjacent coils of the damping spring 50 gradually decreases along the direction from the valve body 10 to the valve port 21. Since the pitch of the spring determines the compression or extension of the spring, the smaller the pitch of the spring, the greater the elastic coefficient of the spring. And along the direction from the valve body 10 to the valve port 21, the inner diameter of the damping spring 50 gradually increases.

[0058] That is, along the direction of the valve body 10 toward the valve port 21, the inner diameter of the spring coil gradually increases, so that the elastic coefficient of the spring gradually decreases, while the pitch gradually increases, so that the elastic coefficient of the spring gradually increases. The shock-absorbing spring 50 can adjust the inner diameter and pitch to improve the shock-absorbing spring 50's impact absorption effect during the actual compression process, thereby avoiding damage to the shock-absorbing spring 50 due to excessive local elastic coefficients, and also avoiding the impact absorption effect of the shock-absorbing spring 50 as a whole due to excessive local elastic coefficients. The noise of the solenoid valve 100 of the present application during actual operation is further reduced, and the user experience is improved.

[0059] It is understandable that in other embodiments, the shock absorbing spring 50 is provided in plurality, wherein one shock absorbing spring 50 is sleeved on the outside of the guide rod 32, and the remaining shock absorbing springs 50 surround the outer edge of the guide rod 32, and the present application does not impose any particular limitation on this.

[0060] In one embodiment, if Figure 6 As shown, the plug 31 is provided with an installation groove 311, and the damping spring 50 is embedded in the installation groove 311. When the plug 31 slides toward the valve body 10, the end surface of the damping spring 50 away from the plug 31 first contacts the valve body 10, and then gradually compresses as the distance between the plug 31 and the valve body 10 decreases.

[0061] It is understandable that in other embodiments, the damping spring 50 may also be fixed on the valve body 10, or fixedly connected between the plug 31 and the valve body 10. This application does not impose any particular limitation on this.

[0062] In one embodiment, please refer to Figure 2 and Figure 3 The valve core 30 also includes an iron core 33, which is accommodated in the inner cavity 10a. The coil 40 is sleeved on the outside of the iron core 33. Along the length direction of the guide rod 32, the guide rod 32 extending into the inner cavity 10a also extends into the coil 40 and is fixedly connected to the iron core 33.

[0063] Based on the magnetic conductivity of the iron core 33, it can be understood that the matching arrangement of the iron core 33 and the coil 40 enables the electromagnetic force generated by the coil 40 to act on the iron core 33 when the coil 40 is energized, and by driving the iron core 33 to slide, the plug 31 is controlled to slide toward the valve port 21 through the guide rod 32 and close the valve port 21, thereby realizing the valve closing function of the solenoid valve 100 of the present application.

[0064] In one embodiment, please refer to Figure 2 and Figure 3 The valve body 10 includes a shell 11 and a spacer 12. Along the axial direction of the coil 40, the end of the shell 11 facing the valve port 21 is provided with a first opening 111. The inner cavity 10a is provided in the shell 11, and the first opening 111 is communicated with the inner cavity 10a. The spacer 12 is located between the shell 11 and the valve port 21, and is fixed to the shell 11, and shields the first opening 111. That is, the spacer 12 cooperates with the shell 11 to form the inner cavity 10a on the side of the spacer 12 away from the valve port 21.

[0065] A guide hole 121 is provided on the isolation member 12, and the guide hole 121 connects the inner cavity 10a and the valve port 21. One end of the guide rod 32 is fixedly connected to the end of the plug 31 away from the valve port 21, and the other end passes through the guide hole 121 and extends into the coil 40, and is fixedly connected to the iron core 33 in the coil 40.

[0066] It can be understood that when the coil 40 is energized, the iron core 33 can slide toward the valve port 21 driven by the electromagnetic force of the energized coil 40, and drive the plug 31 to slide toward the valve port 21 through the guide rod 32 until the plug 31 closes the valve port 21, thereby realizing the valve closing function of the solenoid valve 100 of the present application.

[0067] In one embodiment, if Figure 2 and Figure 3 As described above, along the axial direction of the coil 40 , the projection of the iron core 33 on the isolating member 12 covers the guide hole 121 , so as to prevent the iron core 33 from sliding out of the inner cavity 10 a when the iron core 33 slides relative to the valve body 10 .

[0068] like Figure 2 and Figure 3 As shown, the end of the coil 40 facing the valve port 21 is in contact with the isolating member 12. It can be understood that the isolating member 12 is provided so that the relative position relationship between the iron core 33 and the coil 40 is ensured during the sliding process of the iron core 33 relative to the valve body 10, and the electromagnetic force of the energized coil 40 acts on the electromagnetic force of the iron core 33 during the sliding process, thereby ensuring the valve closing function of the electromagnetic valve 100 of the present application.

[0069] In one embodiment, the solenoid valve 100 of the present application further includes a magnetic conductive member 60, which is fixed to the side of the coil 40 away from the valve port 21. Since when the coil 40 is energized to generate magnetic induction lines, the magnetic induction lines will spread around the coil 40, resulting in a relatively small number of magnetic induction lines passing through the iron core 33. It can be understood that the provision of the magnetic conductive member 60 with magnetic conductivity can enable the magnetic induction lines generated by the energization of the coil 40 to be attracted by the magnetic conductive member 60, thereby improving the integration of the magnetic field generated by the coil 40, increasing the number of magnetic induction lines passing through the iron core 33, increasing the magnetic flux and magnetization efficiency of the iron core 33, and thereby improving the electromagnetic force of the energized coil 40 on the iron core 33, thereby improving the valve closing efficiency of the solenoid valve 100 of the present application.

[0070] At the same time, the magnetic conductive member 60 also has the function of guiding the magnetic field. Since the magnetic induction lines generated by the coil 40 being energized are relatively dispersed, the magnetic induction lines passing through the location of the magnetic conductive member 60 may not pass through the iron core 33. It can be understood that the arrangement of the magnetic conductive member 60 can enable the magnetic induction lines extending into the magnetic conductive member 60 to be guided to the iron core 33 by the magnetic conductive member 60, thereby further improving the magnetic flux and magnetization efficiency of the iron core 33, further improving the electromagnetic force of the energized coil 40 on the iron core 33, and improving the valve closing efficiency of the solenoid valve 100 of the present application.

[0071] On the other hand, the magnetic conductive member 60 also has the function of shielding the external magnetic field. Since the electromagnetic valve 100 may be affected by the external magnetic field during use, the magnetic field distribution generated by the energized coil 40 may be affected. That is, the arrangement of the magnetic conductive member 60 reduces the influence of the external magnetic field on the energized coil 40, ensures the magnetization efficiency of the energized coil 40 on the iron core 33, and ensures the electromagnetic force of the energized coil 40 on the iron core 33.

[0072] In one embodiment, the housing 11 is magnetically conductive, and along the radial direction of the coil 40 , the outer ring of the coil 40 fits against the inner wall of the housing 11 , and the outer ring of the magnetic conductive member 60 also fits against the inner wall of the housing 11 .

[0073] The spacer 12 has magnetic conductivity, and includes a main body 122 and a protrusion 123 connected to each other. The main body 122 is fixed to the inner wall of the housing 11, and the protrusion 123 is arranged on the surface of the main body 122 away from the valve port 21, and extends toward the iron core 33 along the axial direction of the coil 40, and is spaced from the iron core 33. The coil 40 is also sleeved on the outside of the protrusion 123, and the end of the coil 40 facing the valve port 21 is in contact with the surface of the main body 122 provided with the protrusion 123.

[0074] The magnetic induction lines generated by the energized coil 40 can enter the housing 11 under the action of the housing 11, and are transmitted from the housing 11 to the magnetic conductive member 60 along the axial direction of the coil 40, and then transmitted from the magnetic conductive member 60 to the iron core 33 along the radial direction of the coil 40. The magnetic induction lines transmitted to the iron core 33 are transmitted along the axial direction of the coil 40 to the protrusion 123 spaced apart from the iron core 33, and then transmitted to the housing 11 along the radial direction of the coil 40 through the main body 122, and then transmitted back to the coil 40 from the housing 11. Thus, a complete magnetic circuit is formed.

[0075] It can be understood that the provision of a shell 11 and an isolating member 12 both having magnetic conductivity can further improve the concentration of the magnetic induction lines generated by the energized coil 40 while forming a complete magnetic circuit loop of the solenoid valve 100 of the present application, further improve the magnetization efficiency and magnetic flux of the energized coil 40 on the iron core 33, further improve the electromagnetic force of the energized coil 40 on the iron core 33, and further improve the valve closing efficiency of the solenoid valve 100 of the present application.

[0076] In one embodiment, if Figure 2 and Figure 3 As shown, the solenoid valve 100 of the present application further includes an elastic member 70, which is held between the iron core 33 and the protrusion 123 of the isolation member 12. When the coil 40 is energized, the iron core 33 slides toward the valve port 21 and compresses the elastic member 70, so that elastic force is stored in the elastic member 70.

[0077] When the coil 40 switches from the energized state to the de-energized state, the electromagnetic force acting on the iron core 33 disappears, and the elastic force stored in the elastic member 70 pushes the iron core 33 to slide in a direction away from the valve port 21, thereby driving the plug 31 to open the valve port 21 through the guide rod 32, thereby realizing the valve opening function of the solenoid valve 100 of the present application.

[0078] The elastic member 70 is configured as a pre-stressed spring so that the elastic member 70 can apply a force to the iron core 33 away from the valve port 21 to balance the gravity of the iron core 33 and reduce the influence of gravity on the valve opening function of the solenoid valve 100 of the present application.

[0079] In one embodiment, the elastic member 70 is a variable pitch spring. Specifically, in one embodiment, along the length direction of the guide rod 32, the pitch of the elastic member 70 close to the valve port 21 is smaller than the pitch of the elastic member 70 away from the valve port 21. That is, along the direction from the iron core 33 to the isolation member 12, the pitch between two adjacent coils of the elastic member 70 gradually decreases.

[0080] Since the pitch of the spring determines the amount of compression or elongation of the spring, the smaller the pitch of the spring, the greater the elastic coefficient of the spring. In the actual valve closing process, since the coil 40 magnetizes the iron core 33 step by step, the electromagnetic force on the iron core 33 before magnetic saturation is gradually increased. In the process of the iron core 33 sliding toward the valve port 21, the electromagnetic force of the iron core 33 may still be in the process of gradually increasing.

[0081] It can be understood that increasing the pitch of the elastic member 70 near one end of the iron core 33 can make the elastic force of the elastic member 70 on the iron core 33 in the initial motion state relatively small, thereby reducing the difficulty of opening the solenoid valve 100 of the present application.

[0082] As the electromagnetic force of the iron core 33 is saturated, the electromagnetic force on the iron core 33 reaches the maximum, and the sliding speed relative to the valve body 10 also reaches the maximum. It can be understood that reducing the pitch of the elastic member 70 close to the valve port 21 can make the iron core 33 receive a greater elastic force at the end of the valve closing process, thereby reducing the valve closing rate of the iron core 33, reducing the impact of the plug 31 on the valve seat 20 when closing the valve, reducing the valve closing noise, and improving the user experience.

[0083] That is, the solenoid valve 100 of the present application sets the elastic member 70 as a variable pitch spring so that the elastic force provided by the elastic member 70 can be matched based on the movement speed of the iron core 33. While ensuring the valve closing function of the solenoid valve 100 of the present application, the noise generated by the solenoid valve 100 when closing the valve is reduced, thereby improving the user experience.

[0084] In one embodiment, if Figure 2 and Figure 3As shown, the solenoid valve 100 of the present application also includes a magnetic isolation tube 80, one end of which is accommodated in the coil 40 and is sleeved on the outside of the iron core 33, and the other end extends in a direction away from the valve port 21 and is spaced apart from the iron core 33 along the axial direction of the coil 40.

[0085] It can be understood that the provision of the magnetic isolation tube 80 ensures the insulation effect between the coil 40 and the iron core 33, avoids the current in the coil 40 directly acting on the iron core 33 and causing the coil 40 to short-circuit, ensures the electromagnetic force of the energized coil 40 on the iron core 33, and ensures the valve closing function of the solenoid valve 100 of the present application.

[0086] At the same time, the setting of the magnetic isolation tube 80 also realizes the sealing of the gap between the coil 40 and the iron core 33, preventing external impurities from entering between the coil 40 and the iron core 33, causing the iron core 33 to damage the coil 40 and the iron core 33 during sliding, further ensuring the valve opening function of the solenoid valve 100 of the present application.

[0087] In one embodiment, if Figure 2 and Figure 3 As shown, the surface of the main body 122 facing the valve port 21 is also provided with a mounting hole 124, and the guide hole 121 is provided on the protrusion 123 and communicated with the mounting hole 124. The aperture of the mounting hole 124 is larger than the aperture of the guide hole 121, and the plug 31 is partially accommodated in the mounting hole 124. Along the length direction of the guide rod 32, the projection of the plug 31 on the main body 122 covers the guide hole 121. This prevents the plug 31 from entering the inner cavity 10a. That is, the setting of the isolation member 12 limits the valve opening stroke and valve closing stroke of the solenoid valve 100 of the present application.

[0088] The damping spring 50 is received in the mounting hole 124 and is located between the end of the plug 31 away from the valve port 21 and the bottom of the mounting hole 124 along the axial direction of the coil 40. The outer wall of the plug 31 cooperates with the inner wall of the mounting hole 124 to limit the radial shaking of the plug 31 along the coil 40 when the plug 31 slides relative to the valve body 10, thereby ensuring the relative position relationship between the plug 31 and the valve port 21, and further ensuring the valve closing effect of the solenoid valve 100 of the present application.

[0089] In one embodiment, if Figure 2 and Figure 3 As shown, along the radial direction of the coil 40, a first mounting groove 1221 is provided on the outer wall of the main body 122. The solenoid valve 100 of the present application also includes a first sealing ring 91. The first sealing ring 91 is partially accommodated in the first mounting groove 1221 and abuts against the inner wall of the outer shell 11 to achieve sealing between the outer shell 11 and the isolation member 12.

[0090] In one embodiment, if Figure 2 and Figure 3As shown, the housing 11 further includes a second opening 112, which is disposed at the end of the housing 11 away from the valve port 21, and the second opening 112 is connected to the inner cavity 10a. The valve body 10 further includes a protective cover 13, which is fixed to the end of the housing 11 away from the valve port 21 and covers the second opening 112. The protective cover 13 cooperates with the housing 11 and the isolation member 12 to form the inner cavity 10a.

[0091] It can be understood that the provision of the protective cover 13 blocks the possibility of external impurities entering the inner cavity 10a through the second opening 112, avoids the influence of external impurities on the movement state of the iron core 33, and further ensures the valve opening function and valve closing function of the solenoid valve 100 of the present application.

[0092] In one embodiment, if Figure 2 and Figure 3 As shown, a second mounting groove 113 is provided on the housing 11. The solenoid valve 100 of the present application also includes a second sealing ring 92. Along the radial direction of the coil 40, one end of the second sealing ring 92 is accommodated in the second mounting groove 113, and the other end is abutted against the protective cover 13 to achieve sealing of the gap between the protective cover 13 and the housing 11.

[0093] In one embodiment, if Figure 2 and Figure 3 As shown, the valve seat 20 is also provided with a third mounting groove 23, and the solenoid valve 100 of the present application further includes a third sealing ring 93, which is partially received in the third mounting groove 23 and partially exposed from the valve seat 20. When the solenoid valve 100 of the present application is connected to an external structure, the third sealing ring 93 is used to seal the gap between the valve seat 20 and the external structure.

[0094] In one embodiment, if Figure 2 and Figure 3 As shown, a positioning hole 331 is provided in the iron core 33, and a limiting protrusion 3311 extending in its radial direction is provided in the middle of the positioning hole 331. The end of the guide rod 32 away from the plug 31 can be inserted into the positioning hole 331 and embedded in the space formed by the limiting protrusion 3311, so as to realize the fixed connection between the guide rod 32 and the iron core 33. The elastic member 70 is sleeved on the outer edge of the guide rod 32 and abuts against the surface of the limiting protrusion 3311 away from the valve port 21.

[0095] In one embodiment, if Figure 2 and Figure 3 As shown, the plug 31 is also provided with an air guide hole 312, which is connected to the mounting hole 124. Along the radial direction of the coil 40, a gap is left between the guide rod 32 and the inner wall of the guide hole 121, and the guide rod 32 is provided with an air vent (not shown) penetrating along its own axial direction.

[0096] It can be understood that the gas in the external pipeline can enter the air guide hole 312 through the valve port 21 in turn, wherein a part of the gas enters the mounting hole 124, and flows into the gap between the iron core 33 and the isolation member 12 through the gap between the guide rod 32 and the guide hole 121. Another part of the gas enters the upper end of the positioning hole 331 away from the valve port 21 through the air vent, and enters the gap between the magnetic isolation tube 80 and the iron core 33. Thus, the connection between the opposite ends of the iron core 33 and the external environment along the axial direction of the coil 40 is achieved, the stability of the iron core 33 during the relative sliding process is ensured, the influence of the atmospheric pressure on the iron core 33 during the sliding process is reduced, and the valve opening efficiency and valve closing efficiency of the solenoid valve 100 of the present application are improved.

[0097] In one embodiment, if Figure 2 and Figure 3 As shown, the coil 40 includes a coil body 41 and a bushing 42 . The bushing 42 is tubular and sleeved on the outside of the iron core 33 and the protrusion 123 . The coil body 41 is wound around the outer edge of the bushing 42 to form the coil 40 .

[0098] The coil 40 also includes a conductive member 43, and the protective cover 13 is also provided with a through hole 131. The conductive member 43 is fixed to the side of the magnetic conductive member 60 away from the valve port 21. One end of the conductive member 43 is electrically connected to the coil body 41, and the other end passes through the through hole 131 and is exposed outside the valve body 10 to facilitate conduction with the external circuit and realize power supply to the coil 40.

[0099] In one embodiment, if Figure 2 , Figure 3 As shown, the magnetic conductive member 60 is further provided with a avoiding groove 61 , and two avoiding grooves 61 are provided and are axially symmetrically arranged to allow the conductive member 43 to pass through the magnetic conductive member 60 and be electrically connected to the coil body 41 .

[0100] See also Fig.10 Another structural schematic diagram of the solenoid valve 100 provided in one embodiment of the present application is shown.

[0101] like Fig.10 As shown, the end of the guide rod 32 facing the valve port 21 also passes through the plug 31 and extends into the air guide hole 312. The end of the guide rod 32 facing the valve port 21 is also provided with a protective sleeve 34, which is fixed around the outer edge of the guide rod 32 to reduce the communication path between the air guide hole 312 and the valve port 21. While ensuring the air pressure balance on the two sides of the iron core 33 during the sliding process of the iron core 33, the possibility of impurities in the external first pipe entering the inner cavity 10a is reduced.

[0102] Some embodiments of the present application provide an air spring, comprising a main air chamber, an auxiliary air chamber and the above-mentioned solenoid valve 100, wherein the solenoid valve 100 is suitable for being connected between the main air chamber and the auxiliary air chamber to control the on-off between the main air chamber and the auxiliary air chamber, thereby realizing the switching of different stiffness of the air spring.

[0103] Some embodiments of the present application provide an active suspension, including the above-mentioned air spring or the above-mentioned solenoid valve 100 .

[0104] Some embodiments of the present application provide a vehicle including the above-mentioned active suspension or the above-mentioned air spring or the above-mentioned solenoid valve 100 .

[0105] It can be understood that in some other embodiments, the vehicle includes an active suspension, the active suspension includes an air spring, or the active suspension includes the solenoid valve 100 , and the present application does not limit this.

[0106] It can be understood that in some other embodiments, the vehicle only includes an air spring, and the air spring includes a main air chamber, an auxiliary air chamber and a solenoid valve 100. The solenoid valve 100 is used to control the connection between the main air chamber and the auxiliary air chamber. The present application does not limit this.

[0107] It can be understood that in some other embodiments, the vehicle includes the solenoid valve 100 .

[0108] It should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0109] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0110] It should be understood that the application of the present application is not limited to the above examples. For ordinary technicians in the field, they can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application. Ordinary technicians in the field can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made according to the claims of this utility model still fall within the scope covered by this utility model.

Claims

1. A solenoid valve, characterized in that: It comprises a valve body and a valve port with a fixed interval, and a plug arranged between the valve body and the valve port, wherein the plug can move back and forth to open or close the valve port; The solenoid valve further comprises a shock absorbing spring, wherein the shock absorbing spring is located between the valve body and the plug, and the shock absorbing spring is used to reduce the impact of the plug when it slides toward the valve body.

2. The solenoid valve according to claim 1, characterized in that: Along the direction from the valve body to the valve port, the inner diameter of the spring coil of the damping spring gradually increases.

3. The solenoid valve according to claim 2, characterized in that: Of the two adjacent spring coils of the damping spring, the outer diameter of the spring coil away from the valve port is smaller than or equal to the inner diameter of the spring coil close to the valve port.

4. The solenoid valve according to claim 1, characterized in that: The axes of each coil of the shock absorbing spring coincide with each other.

5. The solenoid valve according to claim 1, characterized in that: Along the direction from the valve body toward the valve port, the pitch between two adjacent spring coils of the damping spring gradually decreases.

6. The solenoid valve according to claim 1, characterized in that: The damping spring is fixedly connected to the plug and / or the valve body.

7. The solenoid valve according to any one of claims 1 to 6, characterized in that: The solenoid valve further comprises an iron core and a guide rod, wherein two ends of the guide rod are fixedly connected to the iron core and the plug respectively, and the iron core can slide and drive the plug to reciprocate through the guide rod.

8. The solenoid valve according to claim 7, characterized in that: The valve body includes a fixedly connected shell and an isolating member, the iron core, the isolating member and the plug are all arranged in the shell, along the length direction of the guide rod, the isolating member is arranged between the iron core and the plug, and a guide hole is provided on the isolating member to allow the guide rod to pass through.

9. The solenoid valve according to claim 8, characterized in that: The valve body further comprises an elastic member, wherein the elastic member is located between the isolating member and the iron core, and the elastic member is used for pushing the iron core to slide and driving the plug to move via the guide rod.

10. The solenoid valve according to claim 9, characterized in that: The elastic member is a variable-pitch spring.

11. The solenoid valve according to claim 10, characterized in that: Along the direction from the iron core toward the isolating element, the pitch between two adjacent spring coils of the elastic element gradually decreases.

12. An air spring, characterized in that: It comprises a main air chamber, a secondary air chamber and a solenoid valve as described in any one of claims 1 to 11, wherein the solenoid valve is used to control the on-off between the main air chamber and the secondary air chamber.

13. An air suspension, characterized in that: It comprises the air spring as claimed in claim 12 or the solenoid valve as claimed in any one of claims 1-11.

14. A vehicle, characterized in that: It comprises the air suspension as claimed in claim 13, the air spring as claimed in claim 12, or the solenoid valve as claimed in any one of claims 1-11.

Images