Electromagnetic valve, shock absorber and vehicle

Abstract

The utility model relates to an electromagnetic valve, a shock absorber and a vehicle. The valve body and the valve port are fixedly connected, the valve element and the coil are arranged in an inner cavity of the valve body, the valve element is in sliding connection with the valve body, the coil sleeves the outer side of the valve element, and the coil is electrified to drive the valve element to slide and close the valve port; the electromagnetic valve further comprises a magnetic conductive part which is contained in the inner cavity and fixed to the side, away from the valve port, of the coil, the magnetic conductive part is used for being matched with the electrified coil to drive the valve element to close the valve port, and the height of the magnetic conductive part is larger than or equal to 3.2 mm in the axial direction of the coil. According to the electromagnetic valve, the magnetic conductive part is arranged on the side, away from the valve port, of the coil, and the height of the magnetic conductive part in the axial direction of the coil is larger than or equal to 3.2 mm, so that the guiding capacity of the magnetic conductive part on magnetic induction lines generated by the electrified coil is improved, the magnetic flux and magnetization efficiency of the valve element are improved, and the electromagnetic force, acting on the valve element, of the electrified coil is improved; and therefore, the valve closing efficiency of the electromagnetic valve is improved.

Description

Technical Field

[0001] The present application relates to the field of solenoid valves, and in particular to a solenoid valve, a shock absorber comprising the solenoid valve, and a vehicle comprising the shock absorber. Background Art

[0002] The solenoid valve generally includes a valve body and a valve port that are fixedly connected, and a valve core and a coil disposed in the inner cavity of the valve body. The valve core is slidably connected to the valve body, and the coil is sleeved on the outer side of the valve body. The elastic member of the solenoid valve is also held between the valve body and the valve core. In the prior art, the solenoid valve generally realizes the valve opening and closing functions of the solenoid valve through the mutual cooperation of the coil and the elastic member.

[0003] However, since the direction of the elastic force applied by the elastic member to the valve core is opposite to the direction of the electromagnetic force applied by the energized coil, and the elastic force stored in the elastic member is relatively large, the electromagnetic force generated by energizing the coil needs to be greater than the elastic force of the elastic member to close the valve, thereby reducing the closing efficiency of the solenoid valve. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of this application is to provide a solenoid valve with improved valve closing efficiency. Specifically, the technical solutions include the following:

[0005] In a first aspect, an embodiment of the present application provides a solenoid valve, comprising a valve body and a valve port fixedly connected, and a valve core and a coil arranged in a cavity of the valve body, wherein the valve core is slidably connected to the valve body, the coil is sleeved on the outside of the valve core, and the coil is energized to drive the valve core to slide and close the valve port;

[0006] The solenoid valve also includes a magnetic conductive part, which is accommodated in the inner cavity and fixed on the side of the coil away from the valve port. The magnetic conductive part is used to cooperate with the energized coil to drive the valve core to close the valve port. Along the axial direction of the coil, the height of the magnetic conductive part is greater than or equal to 3.2mm.

[0007] The solenoid valve of the present application is provided with a magnetic conductive part on the side of the coil away from the valve port, so that the magnetic field generated by the coil being energized can pass through the valve core under the action of the magnetic conductive part, so that the valve core can be magnetized under the action of the magnetic field generated by the coil and slide toward the valve port under the action of the electromagnetic force generated by the coil, thereby realizing the valve closing function of the solenoid valve of the present application.

[0008] Then, by setting the height of the magnetic conductive part along the axial direction of the coil to be greater than or equal to 3.2 mm, the magnetic conductive part's ability to guide the magnetic induction lines generated by the energized coil is improved, thereby improving the magnetic flux and magnetization efficiency of the valve core, and improving the electromagnetic force of the energized coil acting on the valve core, thereby improving the valve closing efficiency of the solenoid valve of this application.

[0009] In one embodiment, the magnetic conductive member is annular and is coaxially fixed with the coil; or there are multiple magnetic conductive members, which are arranged and distributed along the circumference of the coil.

[0010] In one embodiment, along the axial direction of the coil, the magnetic conductive member abuts against the coil.

[0011] In one embodiment, the valve core includes a plug and an iron core that are fixedly connected, and along the axial direction of the coil, the plug is located between the iron core and the valve port.

[0012] In one embodiment, when the coil is powered off, the end of the iron core away from the valve port extends out of the magnetic conductive member, or is flush with the end surface of the magnetic conductive member away from the valve port.

[0013] In one embodiment, the plug is fixedly connected to the iron core via a guide rod, the valve body includes a shell and an isolating member, along the axial direction of the coil, the isolating member is fixed between the shell and the valve port, and a guide hole is provided on the isolating member for allowing the guide rod to pass through.

[0014] In one embodiment, along the axial direction of the coil, the projection of the iron core on the isolating member covers the guide hole, and the isolating member is used to prevent the iron core from sliding out of the inner cavity.

[0015] In one embodiment, the shell has magnetic conductivity, and along the radial direction of the coil, the magnetic conductive member and / or the coil is in contact with the inner wall of the shell.

[0016] In one embodiment, the isolating member is magnetically conductive, and is further provided with a protrusion extending toward the core, and the coil is sleeved on the outer side of the protrusion.

[0017] In one embodiment, the solenoid valve also includes an elastic member, which is accommodated in the inner cavity. Along the axial direction of the coil, the elastic member is located between the iron core and the protrusion. When the coil is powered off, the elastic member is used to push the iron core to slide away from the valve port to drive the plug to open the valve port.

[0018] In the second aspect, an embodiment of the present application provides a shock absorber, including a shell, a piston, an oil storage tank, and a solenoid valve. The piston is slidably connected to the shell, one end of the solenoid valve is used to connect to the inside of the shell, and the other end is used to connect to the oil storage tank. The solenoid valve is opened and closed to control the shock-absorbing oil in the oil storage tank to enter the shell, so as to cooperate with the piston to achieve shock absorption.

[0019] On the third aspect, an embodiment of the present application provides a vehicle, including a body, wheels, and shock absorbers, wherein the wheels are rotatably connected to the body, the shell of the shock absorber is fixed to the body, and the piston of the shock absorber is fixed to the wheel to absorb vibration between the wheel and the body.

[0020] It can be understood that the shock absorber provided in the second aspect of the present application and the vehicle provided in the third aspect both have the effect of improving work efficiency 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 structural diagram of a magnetic conductive component provided in one embodiment of the present application;

[0028] Figure 8 Another structural schematic diagram of a solenoid valve provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] The vehicle provided by the present application includes a vehicle body, wheels and a shock absorber, wherein the wheels are rotatably connected to the vehicle body so that the wheels can rotate relative to the vehicle body to drive the vehicle to travel. The shock absorber is connected between the vehicle body and the wheels to absorb vibration between the wheels and the vehicle body.

[0034] Specifically, the shock absorber includes a housing, a piston, an oil storage tank and a solenoid valve. One end of the piston is fixedly connected to the wheel, and the other end is slidably connected to the housing, and the housing is fixedly connected to the vehicle body. When relative vibration occurs between the wheel and the vehicle body, the piston can slide relative to the housing.

[0035] One end of the solenoid valve is used to connect to the interior of the shell, and the other end is used to connect to the oil tank. Shock-absorbing oil is stored in the oil tank, and when the solenoid valve is opened, the shock-absorbing oil enters the interior of the shell through the solenoid valve. During the actual use of the vehicle of the present application, when an external impact acts on the wheel, the wheel will vibrate relative to the body, and this part of the impact will cause the piston to slide relative to the shell, and the piston will then transfer the external impact to the shock-absorbing oil by sliding, so as to compress the shock-absorbing oil and make the shock-absorbing oil generate a certain amount of heat. That is, the shock absorber converts the power of the external impact into heat energy and releases it to the outside through the shock-absorbing oil. Thereby realizing the shock-absorbing function of the shock absorber of the present application on the vehicle.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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 4As 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.

[0040] 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.

[0041] 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 .in, Figure 6 It is a schematic diagram of the partial structure of the coil 40 of the solenoid valve 100 of the present application before being energized.

[0042] like Figure 1-Figure 6 As shown, the solenoid valve 100 of the present application further includes a magnetic conductive member 50, 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 valve core 30. It can be understood that the provision of the magnetic conductive member 50 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 50, thereby improving the integration of the magnetic field generated by the coil 40, increasing the number of magnetic induction lines passing through the valve core 30, increasing the magnetic flux and magnetization efficiency of the valve core 30, and thereby improving the electromagnetic force of the energized coil 40 on the valve core 30, thereby improving the valve closing efficiency of the solenoid valve 100 of the present application.

[0043] At the same time, the magnetic conductive member 50 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 50 may not pass through the valve core 30. It can be understood that the arrangement of the magnetic conductive member 50 can enable the magnetic induction lines extending into the magnetic conductive member 50 to be guided to the valve core 30 by the magnetic conductive member 50, thereby further improving the magnetic flux and magnetization efficiency of the valve core 30, further improving the electromagnetic force of the energized coil 40 on the valve core 30, and improving the valve closing efficiency of the solenoid valve 100 of the present application.

[0044] On the other hand, the magnetic conductive member 50 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 provision of the magnetic conductive member 50 reduces the influence of the external magnetic field on the energized coil 40, ensures the magnetization efficiency of the energized coil 40 on the valve core 30, and ensures the electromagnetic force of the energized coil 40 on the valve core 30.

[0045] like Figure 6 As shown, along the axial direction of the coil 40, the height H of the magnetic conductive member 50 is greater than or equal to 3.2 mm. Based on the fact that the magnetic induction lines that can pass through the magnetic conductive member 50 are limited. It can be understood that when the height H of the magnetic conductive member 50 is less than 3.2 mm, the magnetic induction lines generated by the energized coil 40 pass through the magnetic conductive member 50 less, so that the magnetic conductive member 50 can reach a magnetic saturation state, thereby reducing the number of magnetic induction lines extending into the valve core 30 through the magnetic conductive member 50, reducing the magnetic flux and magnetization efficiency of the valve core 30, and affecting the valve closing efficiency of the solenoid valve 100 of the present application.

[0046] Therefore, the solenoid valve 100 of the present application sets the height H of the magnetic conductive part 50 along the axial direction of the coil 40 to be greater than or equal to 3.2 mm to improve the ability of the magnetic conductive part 50 to guide the magnetic induction lines generated by the energized coil 40, thereby improving the magnetic flux and magnetization efficiency of the valve core 30, and improving the electromagnetic force of the energized coil 40 acting on the valve core 30, thereby improving the valve closing efficiency of the solenoid valve 100 of the present application.

[0047] In one embodiment, if Figure 1-Figure 3 As shown, the valve core 30 includes an iron core 31 and a plug 32 . Along the axial direction of the coil 40 , the plug 32 is located between the iron core 31 and the valve port 21 . The coil 40 is sleeved on the outside of the iron core 31 . The iron core 31 and the plug 32 are fixedly connected.

[0048] Based on the magnetic conductivity of the iron core 31, it can be understood that the matching arrangement of the iron core 31 and the coil 40 enables the electromagnetic force generated by the coil 40 to act on the iron core 31 when the coil 40 is energized, and drives the iron core 31 to slide to control the plug 32 to slide toward the valve port 21 and close the valve port 21, thereby realizing the valve closing function of the solenoid valve 100 of the present application.

[0049] See also Figure 7 The structure diagram of the magnetic conductive member 50 provided in one embodiment of the present application is shown in FIG. Figure 2 .

[0050] like Figure 2 and Figure 7As shown, the magnetic conductive member 50 is annular and is sleeved outside the iron core 31 and fixed coaxially with the coil 40. It can be understood that when the coil 40 is powered off, the end of the iron core 31 away from the valve port 21 can pass through the inner ring of the magnetic conductive member 50 to extend out of the magnetic conductive member 50.

[0051] The magnetic circuit based on the magnetic induction lines generated by the energized coil 40 is relatively dispersed and uniform. It can be understood that setting the magnetic conductive member 50 in a ring shape can ensure the uniformity of the magnetic field gathered by the magnetic conductive member 50, thereby improving the uniform distribution of the magnetic induction lines acting on the iron core 31 through the magnetic conductive member 50, further improving the magnetization efficiency of the iron core 31, and improving the valve closing efficiency of the solenoid valve 100 of the present application.

[0052] It is understandable that in other embodiments, the magnetic conductive member 50 can also be provided in plurality, and the plurality of magnetic conductive members 50 are arranged along the circumference of the coil 40. In other embodiments, the solenoid valve 100 of the present application further includes a second magnetic conductive member, which is also fixed to the side of the coil 40 away from the valve port 21 and is spaced apart from the magnetic conductive member 50. The height of the second magnetic conductive member can be greater than or equal to 3.2 mm, or less than 3.2 mm. The present application does not impose any particular restrictions on this.

[0053] In one embodiment, if Figure 2 and Figure 6 As shown, along the axial direction of the coil 40, the magnetic conductive member 50 abuts against the surface of the coil 40 away from the valve port 21. Since the number of magnetic induction lines generated by the energized coil 40 will be dispersed relatively more as the distance from the energized coil 40 increases, the distribution density of the magnetic induction lines will be relatively reduced accordingly. It can be understood that abutting the magnetic conductive member 50 against the coil 40 can reduce the distance between the magnetic conductive member 50 and the coil 40, so that the magnetic conductive member 50 can receive more magnetic induction lines, thereby allowing the magnetic conductive member 50 to guide more magnetic induction lines to the iron core 31. This improves the utilization rate of the magnetic conductive member 50 and improves the valve closing efficiency of the solenoid valve 100 of the present application.

[0054] In one embodiment, if Figure 2 and Figure 6 As shown, when the coil 40 is powered off, the end of the iron core 31 away from the valve port 21 extends out of the magnetic conductive member 50. That is, when the coil 40 is powered off, along the axial direction of the coil 40, the distance between the end surface of the iron core 31 away from the valve port 21 and the valve port 21 is greater than the distance between the end surface of the magnetic conductive member 50 away from the valve port 21 and the valve port 21.

[0055] Since there is a gap between the magnetic conductive member 50 and the valve core 30 along the radial direction of the coil 40, it can be understood that the iron core 31 extends out of the magnetic conductive member 50, so that when the coil 40 is energized, more magnetic induction lines passing through the magnetic conductive member 50 can pass through the iron core 31, thereby magnetizing the iron core 31, thereby increasing the number of magnetic induction lines guided by the magnetic conductive member 50 that can act on the iron core 31, and improving the utilization rate of the magnetic conductive member 50 in the magnetic circuit of the solenoid valve 100 of the present application.

[0056] At the same time, the number of magnetic induction lines passing through the iron core 31 is increased, thereby increasing the magnetic flux of the iron core 31 and the electromagnetic force of the energized coil 40 acting on the iron core 31, thereby improving the valve closing efficiency of the solenoid valve 100 of the present application.

[0057] It is understandable that in another embodiment, along the axial direction of the coil 40 , the end surface of the iron core 31 away from the valve port 21 may also be flush with the end surface of the magnetic conductive member 50 away from the valve port 21 . The present application does not impose any particular limitation on this.

[0058] 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.

[0059] The isolating member 12 is provided with a guide hole 121, the guide hole 121 communicates with the inner cavity 10a and the valve port 21, and the valve core 30 extends out of the valve body 10 through the guide hole 121. Specifically, the valve core 30 further includes a guide rod 33, one end of which is fixedly connected to the end of the plug 32 away from the valve port 21, and the other end of which passes through the guide hole 121 and extends into the coil 40, and is fixedly connected to the iron core 31 in the coil 40.

[0060] It can be understood that when the coil 40 is energized, the energized coil 40 and the magnetic conductive part 50 cooperate with each other, so that the iron core 31 can slide toward the valve port 21 driven by the electromagnetic force of the energized coil 40, and drive the plug 32 to slide toward the valve port 21 through the guide rod 33 until the plug 32 closes the valve port 21, thereby realizing the valve closing function of the solenoid valve 100 of the present application.

[0061] 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 31 on the isolating member 12 covers the guide hole 121 , so as to prevent the iron core 31 from sliding out of the inner cavity 10 a when the iron core 31 slides relative to the valve body 10 .

[0062] 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 31 and the coil 40 is ensured during the sliding process of the iron core 31 relative to the valve body 10, and the electromagnetic force of the energized coil 40 acts on the electromagnetic force of the iron core 31 during the sliding process, thereby ensuring the valve closing function of the electromagnetic valve 100 of the present application.

[0063] The following is a comparative explanation of the beneficial effects that may be achieved by the solenoid valve 100 of the present application by combining three possible embodiments (embodiment 1 to embodiment 3) of the solenoid valve 100 of the present application and two typical embodiments in the prior art (comparative example 1 and comparative example 2).

[0064] Example 1

[0065] A solenoid valve 100 is provided, wherein a height H of a magnetic conductive member 50 of the solenoid valve 100 is 5.2 mm.

[0066] Example 2

[0067] A solenoid valve 100 is provided, wherein a height H of a magnetic conductive member 50 of the solenoid valve 100 is 4.2 mm.

[0068] Example 3

[0069] A solenoid valve 100 is provided, wherein a height H of a magnetic conductive member 50 of the solenoid valve 100 is 3.2 mm.

[0070] Comparative Example 1

[0071] Provided is a solenoid valve, wherein a height H of a magnetic conductive member of the solenoid valve is 2.7 mm.

[0072] Comparative Example 2

[0073] Provided is a solenoid valve, wherein a height H of a magnetic conductive member of the solenoid valve is 2.2 mm.

[0074] Among them, in the process from opening to closing of the solenoid valves of Examples 1 to 3, as well as Comparative Examples 1 and 2, the spacing between the iron core and the isolation member along the axial direction of the coil gradually changes from 3.5 mm to 0.5 mm as the valve closing process proceeds.

[0075] For the solenoid valves of Examples 1 to 3, and Comparative Examples 1 and 2, the spacing between the iron core and the isolator from opening to closing the valve is 3.5 mm (when the coil is energized but the iron core has not started to move), the spacing between the iron core and the isolator is 2.6 mm (when the coil is energized but the opening of the solenoid valve is relatively large), the spacing between the iron core and the isolator is 1.4 mm (when the coil is energized but the opening of the solenoid valve is relatively small), and the spacing between the iron core and the isolator is 0.5 mm (when the coil is energized and the solenoid valve has completed closing the valve). The electromagnetic force on the iron core in these four time periods was tested and statistically analyzed, and the results are shown in Table 1 below.

[0076] Table 1:

[0077]

[0078] From the test data obtained above, it can be concluded that as the height of the magnetic conductive member 50 gradually increases in Examples 1 to 3, the electromagnetic force gradually increases. As for Comparative Examples 1 and 2, when the height of the magnetic conductive member is less than 3.2 mm, the magnitude of the electromagnetic force on the iron core in different time periods is relatively small.

[0079] It can be understood that limiting the height H of the magnetic conductive member 50 to be greater than or equal to 3.2 mm can increase the electromagnetic force exerted on the iron core 31 of the solenoid valve 100 when the coil 40 is energized, thereby improving the valve closing efficiency of the solenoid valve 100 of the present application.

[0080] 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 50 also fits against the inner wall of the housing 11 .

[0081] 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 31 along the axial direction of the coil 40, and is spaced from the iron core 31. 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.

[0082] 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 50 along the axial direction of the coil 40, and then transmitted from the magnetic conductive member 50 to the iron core 31 along the radial direction of the coil 40. The magnetic induction lines transmitted to the iron core 31 are transmitted along the axial direction of the coil 40 to the protrusion 123 spaced apart from the iron core 31, 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.

[0083] It can be understood that the provision of a shell 11 and an isolation 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 31, further improve the electromagnetic force of the energized coil 40 on the iron core 31, and further improve the valve closing efficiency of the solenoid valve 100 of the present application.

[0084] In one embodiment, along the axial direction of the coil 40, after the coil 40 is powered on, the distance between the iron core 31 and the isolating member 12 is 0.5 mm, and after the coil 40 is powered off, the distance between the iron core 31 and the isolating member 12 is 3.5 mm. Along the axial direction of the coil 40, the height H of the magnetic conductive member 50 is less than or equal to 5 mm.

[0085] It is understandable that when the height H is greater than 5 mm, the magnetic conductive member 50 is too thick, which may cause the magnetic conductive member 50 to be in a magnetically unsaturated state when guiding the magnetic induction lines generated by the energized coil 40, thereby causing a waste of material of the magnetic conductive member 50. At the same time, if the magnetic conductive member 50 is too thick, the overall thickness of the solenoid valve 100 of the present application will also be increased.

[0086] Therefore, the height H of the magnetic conductive component 50 is set to be less than or equal to 5 mm, and the height H of the magnetic conductive component 50 should be greater than or equal to 3.2 mm. This can improve the utilization rate of the magnetic conductive component 50 while ensuring the guiding effect of the magnetic conductive component 50 on the magnetic induction lines generated by the energized coil 40.

[0087] It can be understood that in this embodiment, based on the valve closing stroke of the solenoid valve 100 being between 0.5mm and 3.5mm, in the actual production process, the setting of the height H of the magnetic conductive part 50 can be further narrowed based on other considerations. Exemplarily, the height H of the magnetic conductive part 50 is between 4mm and 5mm.

[0088] In one embodiment, if Figure 2 and Figure 3 As shown, the solenoid valve 100 of the present application further includes an elastic member 60, which is held between the iron core 31 and the protrusion 123 of the isolation member 12. When the coil 40 is energized, the iron core 31 slides toward the valve port 21 and compresses the elastic member 60, so that elastic force is stored in the elastic member 60.

[0089] When the coil 40 switches from the energized state to the de-energized state, the electromagnetic force acting on the iron core 31 disappears, and the elastic force stored in the elastic member 60 pushes the iron core 31 to slide in a direction away from the valve port 21, thereby driving the plug 32 to open the valve port 21 through the guide rod 33, thereby realizing the valve opening function of the solenoid valve 100 of the present application.

[0090] The elastic member 60 is configured as a pre-stressed spring so that the elastic member 60 can apply a force to the iron core 31 away from the valve port 21 to balance the gravity of the iron core 31 and reduce the influence of gravity on the valve opening function of the solenoid valve 100 of the present application.

[0091] In one embodiment, the elastic member 60 is a variable pitch spring, and along the axial direction of the coil 40, the pitch of the elastic member 60 close to the valve port 21 is smaller than the pitch of the elastic member 60 away from the valve port 21. That is, along the direction from the valve body 10 to the valve port 21, the pitch between two adjacent coils of the elastic member 60 gradually decreases.

[0092] 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 31 step by step, the electromagnetic force on the iron core 31 gradually increases before magnetic saturation. In the process of the iron core 31 sliding toward the valve port 21, the electromagnetic force of the iron core 31 may still be in the process of gradually increasing.

[0093] It can be understood that increasing the pitch of the elastic member 60 near one end of the iron core 31 can make the elastic force of the elastic member 60 on the iron core 31 in the initial motion state relatively small, thereby reducing the difficulty of opening the solenoid valve 100 of the present application.

[0094] As the electromagnetic force of the iron core 31 is saturated, the electromagnetic force on the iron core 31 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 60 close to the valve port 21 can make the iron core 31 receive a greater elastic force at the end of the valve closing process, thereby reducing the valve closing rate of the iron core 31, reducing the impact of the plug 32 on the valve seat 20 when closing the valve, reducing the valve closing noise, and improving the user experience.

[0095] That is, the solenoid valve 100 of the present application sets the elastic member 60 as a variable pitch spring so that the elastic force provided by the elastic member 60 can be matched based on the movement speed of the iron core 31. 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.

[0096] 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.

[0097] In one embodiment, if Figure 2 and Figure 3As shown, the solenoid valve 100 of the present application further includes a buffer 70, which is elastic and abuts between the isolating member 12 and the plug 32 along the axial direction of the coil 40. When the coil 40 is energized, the plug 32 may vibrate along the axial direction of the coil 40 while in contact with the valve port 21. This vibration causes the plug 32 to slide away from the valve port 21, thereby compressing the buffer 70. The buffer 70 absorbs the impact when the plug 32 contacts the valve port 21, reduces further damage to the valve seat 20 caused by the impact, and reduces the valve closing noise.

[0098] At the same time, when the coil 40 is switched from the energized state to the de-energized state, the plug 32 slides in the direction away from the valve port 21 under the action of the elastic member 60, and also moves toward the isolation member 12. It can be understood that the setting of the buffer member 70 can also absorb the impact of the plug 32 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.

[0099] In one embodiment, if Figure 2 and Figure 3 As 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 31, and the other end extends in a direction away from the valve port 21 and is spaced apart from the iron core 31 along the axial direction of the coil 40.

[0100] 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 31, avoids the current in the coil 40 directly acting on the iron core 31 and causing the coil 40 to short-circuit, ensures the electromagnetic force of the energized coil 40 on the iron core 31, and ensures the valve closing function of the solenoid valve 100 of the present application.

[0101] 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 31, preventing external impurities from entering between the coil 40 and the iron core 31, causing the iron core 31 to damage the coil 40 and the iron core 31 during the sliding process, further ensuring the valve opening function of the solenoid valve 100 of the present application.

[0102] 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 communicates 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 32 is partially accommodated in the mounting hole 124. Along the axial direction of the coil 40, the projection of the plug 32 on the main body 122 covers the guide hole 121. This prevents the plug 32 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.

[0103] The buffer member 70 is received in the mounting hole 124 and is located between the end of the plug 32 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 32 cooperates with the inner wall of the mounting hole 124 to limit the radial shaking of the plug 32 along the coil 40 when the plug 32 slides relative to the valve body 10, thereby ensuring the relative position relationship between the plug 32 and the valve port 21, and further ensuring the valve closing effect of the solenoid valve 100 of the present application.

[0104] 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.

[0105] In one embodiment, if Figure 2 and Figure 3 As 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.

[0106] 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 31, and further ensures the valve opening function and valve closing function of the solenoid valve 100 of the present application.

[0107] 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.

[0108] 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.

[0109] In one embodiment, if Figure 2 and Figure 3 As shown, a positioning hole 311 is provided in the iron core 31, and a limiting protrusion 3111 extending in its radial direction is provided in the middle of the positioning hole 311. The end of the guide rod 33 away from the plug 32 can be inserted into the positioning hole 311 and embedded in the space formed by the limiting protrusion 3111, so as to realize the fixed connection between the guide rod 33 and the iron core 31. The elastic member 60 is sleeved on the outer edge of the guide rod 33 and abuts against the surface of the limiting protrusion 3111 away from the valve port 21.

[0110] In one embodiment, if Figure 2 and Figure 3 As shown, the plug 32 is also provided with an air guide hole 321, which is connected to the mounting hole 124. Along the radial direction of the coil 40, a gap is left between the guide rod 33 and the inner wall of the guide hole 121, and the guide rod 33 is provided with an air vent (not shown) penetrating along its own axial direction.

[0111] It can be understood that the gas in the external pipeline can enter the air guide hole 321 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 31 and the isolation member 12 through the gap between the guide rod 33 and the guide hole 121. Another part of the gas enters the upper end of the positioning hole 311 away from the valve port 21 through the air vent, and enters the gap between the magnetic isolation tube 80 and the iron core 31. Thus, the connection between the opposite ends of the iron core 31 and the external environment along the axial direction of the coil 40 is achieved, the stability of the iron core 31 during the relative sliding process is ensured, the influence of the atmospheric pressure on the iron core 31 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.

[0112] 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 31 and the protrusion 123 . The coil body 41 is wound around the outer edge of the bushing 42 to form the coil 40 .

[0113] 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 50 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.

[0114] In one embodiment, if Figure 2 , Figure 3 and Figure 7As shown, the magnetic conductive member 50 is further provided with two avoiding grooves 51 , and the avoiding grooves 51 are provided and are axially symmetrically arranged to allow the conductive member 43 to pass through the magnetic conductive member 50 and be electrically connected to the coil body 41 .

[0115] See also Figure 8 Another structural schematic diagram of the solenoid valve 100 provided in one embodiment of the present application is shown.

[0116] like Figure 8 As shown, the end of the guide rod 33 facing the valve port 21 also passes through the plug 32 and extends into the air guide hole 321. The end of the guide rod 33 facing the valve port 21 is also provided with a protective sleeve 34, which surrounds and is fixed to the outer edge of the guide rod 33 to reduce the communication path between the air guide hole 321 and the valve port 21. While ensuring the air pressure balance on the opposite sides of the iron core 31 during the sliding process of the iron core 31, the possibility of impurities in the external first pipe entering the inner cavity 10a is reduced.

[0117] 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.

[0118] 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.

[0119] 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 which are fixedly connected, and a valve core and a coil arranged in the inner cavity of the valve body, wherein the valve core is slidably connected to the valve body, the coil is sleeved on the outer side of the valve core, and the coil is energized to drive the valve core to slide and close the valve port; The solenoid valve also includes a magnetic conductive component, which is accommodated in the inner cavity and fixed to the side of the coil away from the valve port. The magnetic conductive component is used to cooperate with the energized coil to drive the valve core to close the valve port. Along the axial direction of the coil, the height of the magnetic conductive component is greater than or equal to 3.2 mm.

2. The solenoid valve according to claim 1, characterized in that: The magnetic conductive member is annular and is coaxially fixed with the coil; or There are multiple magnetic conductive parts, and the multiple magnetic conductive parts are arranged and distributed along the circumference of the coil.

3. The solenoid valve according to claim 1, characterized in that: Along the axial direction of the coil, the magnetic conductive member abuts against the coil.

4. The solenoid valve according to any one of claims 1 to 3, characterized in that: The valve core comprises a plug and an iron core which are fixedly connected. Along the axial direction of the coil, the plug is located between the iron core and the valve port.

5. The solenoid valve according to claim 4, characterized in that: When the coil is powered off, the end of the iron core away from the valve port extends out of the magnetic conductive member, or is flush with the end surface of the magnetic conductive member away from the valve port.

6. The solenoid valve according to claim 4, characterized in that: The plug is fixedly connected to the iron core via a guide rod. The valve body comprises a shell and an isolating member. Along the axial direction of the coil, the isolating member is fixed between the shell and the valve port. The isolating member is provided with a guide hole for allowing the guide rod to pass through.

7. The solenoid valve according to claim 6, characterized in that: Along the axial direction of the coil, the projection of the iron core on the isolating member covers the guide hole, and the isolating member is used to prevent the iron core from sliding out of the inner cavity.

8. The solenoid valve according to claim 6, characterized in that: The shell has magnetic conductivity, and along the radial direction of the coil, the magnetic conductive member and / or the coil is in contact with the inner wall of the shell.

9. The solenoid valve according to claim 6, characterized in that: The isolating member is magnetically conductive and is further provided with a protruding portion extending toward the iron core, and the coil is sleeved on the outer side of the protruding portion.

10. The solenoid valve according to claim 9, characterized in that: The solenoid valve also includes an elastic member, which is accommodated in the inner cavity. Along the axial direction of the coil, the elastic member is located between the iron core and the protrusion. When the coil is powered off, the elastic member is used to push the iron core to slide away from the valve port to drive the plug to open the valve port.

11. A shock absorber, characterized in that: It includes a shell, a piston, an oil storage tank, and a solenoid valve as described in any one of claims 1 to 10, wherein the piston is slidably connected to the shell, one end of the solenoid valve is used to connect to the inside of the shell, and the other end is used to connect to the oil storage tank, and the solenoid valve is opened and closed to control the shock-absorbing oil in the oil storage tank to enter the shell to cooperate with the piston to achieve shock absorption.

12. A vehicle, characterized in that: It comprises a vehicle body, a wheel, and a shock absorber as claimed in claim 11, wherein the wheel is rotatably connected to the vehicle body, the housing of the shock absorber is fixed to the vehicle body, and the piston of the shock absorber is fixed to the wheel to absorb vibration between the wheel and the vehicle body.

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