Solenoid valve and damper

Abstract

The electromagnetic valve and shock absorber, the electromagnetic valve comprises a shell, a main valve body, a valve rod and an electromagnet; the shell comprises a first accommodating space and a second accommodating space arranged along the axial direction, the first accommodating space comprises a first valve port arranged along the circumferential direction; the main valve body is arranged at least in the second accommodating space and comprises a connecting hole; the valve rod is arranged at least in the first accommodating space and comprises a first rod end and a second rod end opposite in the axial direction, the first rod end extends into the second accommodating space and is connected to the connecting hole in sliding mode; and the electromagnet is arranged outside the first accommodating space and at least partially surrounds the first valve port. The damping of the electromagnetic valve is continuously adjustable, the structure is simpler and more compact, and the electromagnetic valve can be used in a shock absorber.

Description

TECHNICAL FIELD

[0001] At least one embodiment of the present disclosure relates to an electromagnetic valve and a shock absorber. BACKGROUND

[0002] In the automobile suspension system, because the spring also reciprocates when filtering the road vibration, in order to improve the smoothness of the automobile, a shock absorber is usually installed in the suspension system to suppress the oscillation when the spring rebounds after absorbing the vibration. Therefore, the shock absorber can reduce the vibration of the vehicle frame and the vehicle body to improve the smoothness of the automobile.

[0003] With the rapid development of the automobile industry and the continuous improvement of people's living standards, people's requirements for the comfort of the automobile are getting higher and higher. The single damping value shock absorber cannot meet people's needs, and the damping value adjustable shock absorber has emerged as the times require. SUMMARY

[0004] At least one embodiment of the present disclosure provides an electromagnetic valve, which comprises a housing, a main valve body, a valve rod and an electromagnet; the housing comprises a first accommodating space and a second accommodating space arranged along an axial direction, wherein the first accommodating space comprises a first valve port arranged along a circumferential direction; the main valve body is arranged at least in the second accommodating space and comprises a connecting hole; the valve rod is arranged at least in the first accommodating space and comprises a first rod end and a second rod end opposite in the axial direction, the first rod end extends into the second accommodating space and is connected to the connecting hole in a sliding manner; and the electromagnet is arranged outside the first accommodating space and at least partially surrounds the first valve port.

[0005] For example, in the electromagnetic valve provided by at least one embodiment of the present disclosure, the housing comprises a first sub-housing and a second sub-housing arranged along the axial direction, the first sub-housing and the second sub-housing are spaced apart to form the first valve port, the valve rod comprises a first fluid outlet opposite to the first valve port, and the valve rod is configured to be controlled to move along the axial direction to adjust the opposite area of the first fluid outlet and the first valve port.

[0006] For example, in the electromagnetic valve provided by at least one embodiment of the present disclosure, the valve rod comprises a first fluid passage, a second fluid passage and a third fluid passage; the first fluid passage extends along the axial direction and penetrates the first rod end and the second rod end; the second fluid passage extends along the axial direction and is located on one side of the first fluid passage; and the third fluid passage is communicated with the second fluid passage and extends in a direction perpendicular to the axial direction, and comprises the first fluid outlet.

[0007] For example, in the electromagnetic valve provided by at least one embodiment of the present disclosure, the second sub-housing includes a first part and a second part; the first part is configured to form the first containing space together with the first sub-housing, wherein the first containing space has a first diameter at the first part; the second part is configured to form the second containing space, and the second containing space has a second diameter, which is greater than the first diameter.

[0008] For example, in the electromagnetic valve provided by at least one embodiment of the present disclosure, the first containing space has a third diameter at the first sub-housing, which is greater than the first diameter and less than the second diameter.

[0009] For example, in the electromagnetic valve provided by at least one embodiment of the present disclosure, the valve rod includes a first rod part and a second rod part; the first rod part is at least partially located in the first containing space formed by the first sub-housing and has a first rod diameter; the second rod part is at least partially located in the first containing space formed by the second sub-housing, wherein the second rod part has a main body part and a narrowed part located on a side of the main body part away from the first rod part, the main body part has a second rod diameter, the narrowed part has a third rod diameter, the second rod diameter is greater than the third rod diameter, and the second fluid channel penetrates the main body part of the first rod part and the second rod part.

[0010] For example, in the electromagnetic valve provided by at least one embodiment of the present disclosure, the third fluid channel is located in the first rod part, the first rod diameter is greater than the second rod diameter to form a first step limiting part at the connection between the first rod part and the second rod part, the first step limiting part cooperates with an end of the first part of the second sub-housing close to the first sub-housing to limit the movement limit of the valve rod in the direction of the main valve body.

[0011] For example, in the electromagnetic valve provided by at least one embodiment of the present disclosure, the first rod end is connected to a side of the narrowed part away from the main body part, the first rod end is at least partially located in the second containing space formed by the second sub-housing and has a fourth rod diameter, wherein the third rod diameter is greater than the fourth rod diameter.

[0012] For example, in the electromagnetic valve provided by at least one embodiment of the present disclosure, the narrowed part and the side wall of the first part of the second sub-housing form a containing cavity, and the second fluid channel communicates with the second containing space through the containing cavity.

[0013] For example, the electromagnetic valve provided by at least one embodiment of the present disclosure includes a third rod with a larger diameter than the fourth rod, so as to form a second step limiting portion at the connection between the narrowed portion and the end of the first rod, and a reset spring is arranged on a first surface of the main valve body close to the first accommodating space, and the reset spring is limited between the first surface and the narrowed portion by the second step limiting portion.

[0014] For example, the electromagnetic valve provided by at least one embodiment of the present disclosure includes a third sub-housing spaced from the first sub-housing along the axial direction to expose the first valve port, and the third sub-housing is adjacent to the second sub-housing with a gap to form a first fluid path between the second sub-housing and the third sub-housing in communication with the first valve port.

[0015] For example, the electromagnetic valve provided by at least one embodiment of the present disclosure includes a third sub-housing including a first extension and a second extension; the first extension extends along the axial direction to form a first sub-path of the first fluid path with the second sub-housing; and the second extension extends perpendicular to the axial direction to form a second sub-path of the first fluid path with the second sub-housing, wherein the second sub-housing includes a second fluid path having a first fluid inlet and a second fluid outlet, and the first fluid inlet is in communication with the second sub-path.

[0016] For example, the electromagnetic valve provided by at least one embodiment of the present disclosure includes that the electromagnet is arranged in a groove formed by the first extension and the second extension.

[0017] For example, the electromagnetic valve provided by at least one embodiment of the present disclosure further includes a safety gasket and a reset spring arranged at the first fluid inlet, wherein the reset spring is arranged between the electromagnet and the safety gasket, the safety gasket includes at least one opening, and the safety gasket is configured to control the flow of the first fluid inlet under the electromagnetic force of the electromagnet and the elastic force of the reset spring.

[0018] For example, the electromagnetic valve provided by at least one embodiment of the present disclosure includes that the first extension of the third sub-housing is spaced from the first sub-housing to form a mounting portion configured to mount a magnetic isolation ring, and a normal projection of the first valve port on the magnetic isolation ring is located inside the magnetic isolation ring.

[0019] For example, the electromagnetic valve provided by at least one of the embodiments of the present disclosure includes a main valve body, a first sub-housing, a second sub-housing, and a valve rod.

[0020] For example, the electromagnetic valve provided by at least one of the embodiments of the present disclosure includes a main valve body, a first sub-housing, a second sub-housing, and a valve rod.

[0021] For example, the electromagnetic valve provided by at least one of the embodiments of the present disclosure further includes a pressure relief valve continuously arranged in the cavity and the second valve port, wherein the pressure relief valve includes a rivet, an elastic member, a support plate, and at least one gasket; the rivet is continuously arranged in the cavity and the second valve port, the elastic member is arranged in the cavity and at the end of the rivet close to the valve rod, the support plate is arranged at the side of the elastic member away from the valve rod and is slidably connected to the rivet, and the at least one gasket is arranged at the side of the support plate away from the valve rod and is slidably connected to the rivet and covers the second valve port, wherein each of the at least one gasket includes at least one opening.

[0022] For example, the electromagnetic valve provided by at least one of the embodiments of the present disclosure includes a main valve body, a first sub-housing, a second sub-housing, and a valve rod.

[0023] The present disclosure provides at least one of the following embodiments of a shock absorber, which includes the electromagnetic valve provided by the embodiments of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described in the following description only relate to some of the embodiments of the present disclosure, but not limit the present disclosure.

[0025] Figure 1A cross-sectional view of the electromagnetic valve provided for at least one embodiment of the present disclosure;

[0026] Figure 2 A perspective view of the electromagnetic valve provided for at least one embodiment of the present disclosure;

[0027] Figure 3 A perspective view of the valve rod of the electromagnetic valve provided for at least one embodiment of the present disclosure;

[0028] Figure 4 An exploded view of the valve rod of the electromagnetic valve provided for at least one embodiment of the present disclosure;

[0029] Figure 5 A top view of the valve rod of the electromagnetic valve provided for at least one embodiment of the present disclosure;

[0030] Figure 6 A cross-sectional view of the valve rod along line A-A in Figure 5

[0031] Figure 7 A partial cross-sectional view of the electromagnetic valve in Figure 1

[0032] A perspective view of the second sub-housing of the electromagnetic valve provided for at least one embodiment of the present disclosure; Figure 8

[0033] A top view of the second sub-housing of the electromagnetic valve provided for at least one embodiment of the present disclosure; Figure 9

[0034] A cross-sectional view of the second sub-housing along line B-B in Figure 10 Figure 9 A cross-sectional view of the second sub-housing along line C-C in

[0035] Figure 11 Figure 9 A perspective view of the third sub-housing and the second sub-housing of the electromagnetic valve provided for at least one embodiment of the present disclosure after assembly;

[0036] Figure 12 An exploded view of the third sub-housing and the second sub-housing of the electromagnetic valve provided for at least one embodiment of the present disclosure after assembly;

[0037] Figure 13 A top view of the third sub-housing and the second sub-housing in

[0038] Figure 14 A cross-sectional view of the third sub-housing and the second sub-housing along line D-D in Figure 12

[0039] Figure 15 Figure 14 ​​​​​​

[0040] Figure 16 for Figure 15 An enlarged schematic diagram of the third and second sub-shells at point E;

[0041] Figure 17 This is a plan view of the safety gasket of a solenoid valve provided in at least one embodiment of the present disclosure;

[0042] Figure 18 A perspective view of the main valve body of a solenoid valve provided in at least one embodiment of the present disclosure;

[0043] Figure 19 for Figure 18 Top view of the main valve body;

[0044] Figure 20 for Figure 19 A schematic cross-sectional view of the main valve body along line FF;

[0045] Figure 21 A perspective view of another main valve body of the solenoid valve provided in at least one embodiment of the present disclosure;

[0046] Figure 22 for Figure 21 Top view of the main valve body;

[0047] Figure 23 for Figure 22 A schematic diagram of the cross-section of the main valve body along line GG.

[0048] Figure 24 A schematic diagram of the structure of the elastic element of the solenoid valve provided in at least one embodiment of this disclosure;

[0049] Figure 25 A side view of the elastic element of a solenoid valve provided in at least one embodiment of this disclosure; and

[0050] Figure 26 This is a schematic diagram of the gasket structure of a pressure reducing valve for a solenoid valve provided in at least one embodiment of the present disclosure. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] Unless otherwise defined, technical terms or scientific terms used herein shall have the same meaning to one of ordinary skill in the art of the present application. The terms "first", "second", and similar terms do not imply any order, quantity, or importance, but are used to identify different components. The terms "include", "comprise", and similar terms are intended to encompass the elements listed thereafter, equivalents thereof, and additional or other elements. The terms "inner", "outer", "upper", "lower", and similar terms are used to represent relative positions, and can change when the absolute positions of the described objects change.

[0053] The terms "parallel", "perpendicular", and "same" used in the present disclosure include the strict "parallel", "perpendicular", and "same", as well as "substantially parallel", "substantially overlapping", "substantially same" with certain errors, which are acceptable deviations within a range determined by one of ordinary skill in the art for a particular value, considering measurement and errors related to measurement of a particular quantity (e.g., limitations of a measurement system). For example, "substantially" can mean within one or more standard deviations, and unless otherwise specified, can mean within a 10% or 5% deviation of the value.

[0054] With the development of automobile electrification and autonomous driving technology, the weight of the automobile increases, and the power performance is also improved, so the automobile needs the shock absorber to work in a wider range, and thus the damping characteristics of the shock absorber need to be continuously adjustable. For this purpose, an electromagnetic valve with continuously adjustable damping can be used to achieve the continuously adjustable damping characteristics of the shock absorber.

[0055] The electromagnetic valve with continuously adjustable damping used in the automobile shock absorber needs to achieve two functions: one is continuously adjustable damping, at this time the working current range of the electromagnetic valve is I ~ Imax, the other is safety in failure, at this time the working current range of the electromagnetic valve is 0 ~ I. That is, in addition to being able to achieve continuously adjustable damping under the drive of the working current, the electromagnetic valve used in the automobile shock absorber also needs to ensure safety in the case of power failure or driver failure, so as to ensure basic driving and steering safety. For example, the damping of the electromagnetic valve can be kept at a middle value within its adjustable range in the case of power failure or driver failure, so as to ensure basic driving and steering safety. It should be noted that the above I can also be referred to as the turning current, which can generally be 300 ~ 450mA, and individually up to 600mA.

[0056] To this end, at least one embodiment of the present disclosure provides an electromagnetic valve, which comprises a housing, a main valve body, a valve rod, and an electromagnet; the housing comprises a first accommodating space and a second accommodating space arranged along an axial direction, the first accommodating space comprises a first valve port arranged along a circumferential direction; the main valve body is arranged at least in the second accommodating space and comprises a connecting hole; the valve rod is arranged at least in the first accommodating space and comprises a first rod end and a second rod end opposite in the axial direction, the first rod end extends into the second accommodating space and is connected to the connecting hole in a sliding manner; and the electromagnet is arranged outside the first accommodating space and at least partially surrounds the first valve port.

[0057] The electromagnetic valve provided by the embodiments of the present disclosure can be used in a shock absorber, which can be used in any device requiring damping, such as a driving vehicle. The electromagnetic valve can adjust the pressure inside the valve in the balanced state through the first valve port, and can adjust the flow of the first valve port by adjusting the working current of the electromagnetic valve, so as to adjust the pressure of the fluid entering the electromagnetic valve, thereby realizing continuous adjustable damping. On the other hand, the structure of the shock absorber is simpler, more compact, smaller in size, easier to install, and has higher safety and economy.

[0058] At least one embodiment of the present disclosure also provides a shock absorber comprising any one of the electromagnetic valves provided by the embodiments of the present disclosure. The shock absorber provided by the embodiments of the present disclosure can be used in any device requiring damping, such as a driving vehicle, and can effectively adjust the pressure of the fluid entering the electromagnetic valve during the working process of the shock absorber.

[0059] In the following, the electromagnetic valve and the shock absorber provided by the embodiments of the present disclosure will be described in detail through several specific embodiments.

[0060] Exemplarily, Figure 1 a cross-sectional schematic view of the electromagnetic valve provided by at least one embodiment of the present disclosure is shown, Figure 2 a schematic view of the electromagnetic valve provided by at least one embodiment of the present disclosure is shown. It is shown that Figures 1-2 The electromagnetic valve comprises a housing 100, a main valve body 200, a valve rod 300, an electromagnet 400, and the like. For example, these structures can be assembled into an integral whole by press fitting.

[0061] As shown in Figures 1-2 The housing 100 comprises a first accommodating space S1 and a second accommodating space S2 arranged along an axial direction X, the first accommodating space S1 comprises a first valve port H1 arranged along a circumferential direction, for example, the first valve port H1 can at least partially surround the first accommodating space S1, for example, the first valve port H1 can completely surround the first accommodating space S1 to form an annular valve port, or the first valve port H1 can also comprise a plurality of sub-valve ports arranged around the first accommodating space S1.

[0062] As shown in Figures 1-2As shown, the main valve body 200 is at least disposed in the second receiving space S2, including a connecting hole 201; the valve stem 300 is at least disposed in the first receiving space S1, including a first rod end 301 and a second rod end 302 opposite to each other in the axial direction X. The first rod end 301 extends into the second receiving space S2 and is slidably connected to the connecting hole 201. For example, the valve stem 300 can move relative to the main valve body 200 in the axial direction X. At this time, the first rod end 301 slides relative to the connecting hole 201 in the axial direction X.

[0063] For example, the valve stem 300 and the housing portion surrounding the valve stem 300 constitute a pilot valve, and the main valve body 200 and the housing portion surrounding the main valve body 200 constitute a main valve. Multiple fluid paths can be formed in the pilot valve and the main valve to regulate the pressure inside the solenoid valve.

[0064] like Figures 1-2 As shown, the electromagnet 400 is disposed outside the first receiving space S1, surrounding the valve stem 300. For example, the electromagnet 400 at least partially surrounds the first valve port H1, or even completely surrounds the first valve port H1. For example, in a direction perpendicular to the axial direction X, at least a portion of the orthogonal projection of the first valve port H1 onto the electromagnet 400 lies within the electromagnet 400, or even completely within the electromagnet 400. The electromagnet 400 can control the valve stem 300, for example, controlling the valve stem 300 to move along the axial direction X.

[0065] For example, in some embodiments, the housing 100 includes a first sub-housing 101 and a second sub-housing 102 arranged along the axial direction X, spaced apart to form a first valve port H1. The valve stem 300 includes a first fluid outlet 300A, which faces / opposes the first valve port H1. The valve stem 300 is configured to be controllably moved along the axial direction X to adjust the facing area of ​​the first fluid outlet 300A and the first valve port H1, thereby adjusting the fluid flow rate between the first fluid outlet 300A and the first valve port H1, i.e., adjusting the fluid flow rate exiting from the first valve port H1. When the facing area of ​​the first fluid outlet 300A and the first valve port H1 is large, the fluid flow rate between the first fluid outlet 300A and the first valve port H1 is larger; when the facing area of ​​the first fluid outlet 300A and the first valve port H1 is small, the fluid flow rate between the first fluid outlet 300A and the first valve port H1 is smaller.

[0066] For example, the movement of the valve stem 300, such as the moving direction and the moving distance, can be controlled by controlling the current of the electromagnet 400, thereby controlling the facing area of the first fluid outlet 300A and the first valve port H1, adjusting the fluid flow between the first fluid outlet 300A and the first valve port H1, controlling the different equilibrium states of the pilot valve, adjusting the pressure in the pilot valve in the equilibrium state, thereby adjusting the pressure of the fluid entering the electromagnetic valve, and realizing the continuous adjustable damping of the electromagnetic valve. In addition, the valve stem 300 can act as an armature controlled by the electromagnet 400, thereby eliminating the need for an additional armature, making the structure of the electromagnetic valve simpler, more compact, smaller in size, and more convenient to install.

[0067] For example, Figure 3 A perspective view of the valve stem of the electromagnetic valve provided by at least one embodiment of the present disclosure, Figure 4 An exploded view of the valve stem, Figure 5 A top view of the valve stem, Figure 6 A cross-sectional view of the valve stem along the A-A line in Figure 5 As shown in Figures 1-6 In some embodiments, the valve stem 300 includes a first fluid passage T1, a second fluid passage T2, and a third fluid passage T3. The first fluid passage T1 extends along the axial direction X, for example, is located at the middle position of the valve stem 300, and penetrates the first rod end 301 and the second rod end 302. The second fluid passage T2 extends along the axial direction X and is located on one side of the first fluid passage T1, Figure 1 and Figure 6 as shown on the left side in Figure 6 The third fluid passage T3 is communicated with the second fluid passage T2 but is spaced apart from the first fluid passage T1, for example, is spaced apart from the first fluid passage T1 by the sleeve 305, and the extension direction of the third fluid passage T3 is perpendicular to the axial direction X, for example, forms a transverse fluid passage. The third fluid passage T3 includes the first fluid outlet 300A described above.

[0068] For example, in some embodiments, the third fluid passage T3 can be an annular passage surrounding the first fluid passage T1, or, in other embodiments, the third fluid passage T3 can also be semi-annular or include a plurality of sub-passages.

[0069] Therefore, referring to Figure 1The fluid flowing from the lower end of the first fluid passage T1 of the valve stem 300 can flow out from the upper end of the first fluid passage T1, and then flow into the second fluid passage T2 through the gap between the valve stem 300 and the first sub-housing 101. The fluid is divided by the third fluid passage T3 when passing through the third fluid passage T3. Part of the fluid flows out from the first fluid outlet 300A and the first valve port H1 through the third fluid passage T3, and the other part of the fluid continues to flow downward along the second fluid passage T2. In this way, the pressure inside the pilot valve can be adjusted through different fluid passages.

[0070] For example, in some embodiments, as shown in Figure 1 , Figure 4 and Figure 6 , the first stem portion 303 of the valve stem 300 is sealed with the first sub-housing 101 by the first sealing ring 311, and the second stem portion 304 of the valve stem 300 is sealed with the second sub-housing 102 by the second sealing ring 312. For example, annular grooves are formed on the first stem portion 303 and the second stem portion 304 respectively to accommodate the first sealing ring 311 and the second sealing ring 312. For example, the first sealing ring 311 and the second sealing ring 312 can be in the form of rubber rings, which can achieve sufficient sealing effect. In this way, the fluid can strictly flow along the fluid passages formed in the valve stem 300.

[0071] For example, Figure 7 shows a partial sectional view of the electromagnetic valve in Figure 1 , in some embodiments, as shown in Figure 1 and Figure 7 , the second sub-housing 102 includes a first portion 1021 and a second portion 1022. The first portion 1021 is configured to form a first containing space S1 together with the first sub-housing 101, for example, the first containing space S1 is mainly used to contain the valve stem 300, and the first containing space S1 has a first diameter D1 at the first portion 1021. The second portion 1022 is configured to form a second containing space S2, for example, the second containing space S2 is mainly used to contain the main valve body 200, and the second containing space S2 has a second diameter D2, which is greater than the first diameter D1, so as to form more fluid space in the second containing space S2, such as the cavity T4 of the main valve body 200 and the space above the first surface 200A of the main valve body 200, so as to facilitate the adjustment of the pressure in the electromagnetic valve.

[0072] For example, in some embodiments, as shown in Figure 1 and Figure 7As shown, the first accommodating space S1 has a third diameter D3 at the first sub-housing 101. The third diameter D3 is larger than the first diameter D1, for example, slightly larger than the first diameter D1, and the third diameter D3 is smaller than the second diameter D2. This arrangement facilitates the limiting of the movement of the valve stem 300 along the axial direction X and the formation of the first fluid path P1, which will be described in detail later.

[0073] For example, in some embodiments, such as Figures 1-6 As shown, the valve stem 300 is a one-piece valve stem with different stem diameters in different parts, thus cooperating with different structures to achieve different functions. For example, the valve stem 300 includes a first stem portion 303 and a second stem portion 304; the first stem portion 303 is at least partially located within the first receiving space S1 formed by the first sub-housing 101, as shown in the reference. Figure 6 The first rod portion 303 has a first rod diameter L1, for example, the first rod diameter L1 is slightly smaller than the first diameter D1, so that the first rod portion 303 is slidably disposed in the first receiving space S1; the second rod portion 304 is at least partially located in the first receiving space S1 formed by the second sub-shell 102, the second rod portion 304 has a main body portion 3041 and a narrowing portion 3042 located on the side of the main body portion 3041 away from the first rod portion 303, the main body portion 3041 has a second rod diameter L2, the narrowing portion 3042 has a third rod diameter L3, the second rod diameter L2 is larger than the third rod diameter L3, and the second rod diameter L2 is slightly smaller than the second diameter L2, so that the second rod portion 304 is slidably disposed in the first receiving space S1; the second fluid channel T2 penetrates the main body portion 3041 of the first rod portion 303 and the second rod portion 304, at this time, the channel length formed by the second fluid channel T2 is less than the channel length of the first fluid channel T1.

[0074] For example, in some embodiments, such as Figure 1 and Figure 6 As shown, the third fluid channel T3 is located in the first rod portion 303. The first rod diameter L1 is larger than the second rod diameter L2 to form a first step limiting portion A1 at the connection between the first rod portion 303 and the second rod portion 304. The first step limiting portion A1 cooperates with the end of the first part 1021 of the second sub-housing 102 near the first sub-housing 101 to limit the movement limit of the valve stem 300 in the direction of the main valve body 200.

[0075] For example, in Figure 1In the embodiment, when the first step limiting part A1 abuts against the end of the first part 1021 near the first sub-housing 101, the valve stem 300 reaches the movement limit in the direction of the main valve body 200 (downward in the figure). At this time, the area of ​​the first fluid outlet 300A and the first valve port H1 is the largest, and the fluid flow rate between the first fluid outlet 300A and the first valve port H1 is the largest. When the valve stem 300 moves upward from this limit position, the fluid flow rate between the first fluid outlet 300A and the first valve port H1 gradually decreases.

[0076] For example, in some embodiments, such as Figure 1 and Figure 6 As shown, the first rod end 301 is connected to the side of the narrowing portion 3042 away from the main body portion 3041. The first rod end 301 is at least partially located within the second receiving space S2 formed by the second sub-housing 102, and is slidably connected to the connecting hole 201. The first rod end 301 has a fourth rod diameter L4, and the third rod diameter L3 is greater than the fourth rod diameter L4. For example, in some embodiments, the third rod diameter L3 is greater than the fourth rod diameter L4 to form a second step limiting portion A2 at the connection between the narrowing portion 3042 and the first rod end 301. The second step limiting portion A2 can limit the sliding limit of the first rod end 301 in the connecting hole 201.

[0077] For example, in some embodiments, such as Figure 1 As shown, a return spring 202 is provided on the first surface (upper surface) 200A of the main valve body 200 near the first receiving space S1. The return spring 202 is limited between the first surface 200A and the narrowing portion 3042 by the second step limiting portion A2. For example, the two ends of the return spring 202 are respectively configured to abut against the second step limiting portion A2 and the first surface 200A, thereby providing resistance when the second step limiting portion A2 abuts against the return spring 202 and the valve stem 300 has a downward movement tendency relative to the main valve body 200, so as to facilitate the adjustment of the internal pressure of the solenoid valve.

[0078] For example, in some embodiments, such as Figure 1 As shown, the narrowing portion 3042 and the sidewall of the first portion 1021 of the second sub-housing 102 form a receiving cavity S0, and the second fluid channel T2 communicates with the second receiving space S2 through the receiving cavity S0. Thus, fluid flowing downwards from the second fluid channel T2 can be contained in the receiving cavity S0 and the receiving space above the first surface 200A for pressure regulation. For example, the fluid in the receiving cavity S0 and the receiving space above the first surface 200A can apply pressure to the main body portion 3041 of the second rod portion 304 and the lower surface of the narrowing portion 3042.

[0079] For example, in some embodiments, such as Figure 1 and Figure 7As shown, the housing 100 further comprises a third sub-housing 103, which is spaced from the first sub-housing 101 along the axial direction X to expose the first valve port H1, and which is adjacent to the second sub-housing 102 with a gap to form a first fluid path P1 communicating with the first valve port H1 between the second sub-housing 102 and the third sub-housing 103. For example, in some embodiments, the third sub-housing 103 can be sleeved on the second sub-housing 102, thereby realizing assembly with the third sub-housing 103.

[0080] For example, Figure 8 a perspective view of the second sub-housing of the electromagnetic valve provided for at least one embodiment of the present disclosure, Figure 9 a top view of the second sub-housing, Figure 10 a sectional view of the second sub-housing along the line B-B in Figure 9 a sectional view of the second sub-housing along the line C-C in Figure 11 a sectional view of the second sub-housing along the line C-C in Figure 9 a sectional view of the second sub-housing along the line C-C in Figure 12 a perspective view of the third sub-housing 103 and the second sub-housing 102 after assembly, Figure 13 an exploded view of the third sub-housing 103 and the second sub-housing 102 after assembly, Figure 14 a top view of the third sub-housing 103 and the second sub-housing 102 in Figure 12 a top view of the third sub-housing 103 and the second sub-housing 102 in Figure 15 a sectional view of the third sub-housing 103 and the second sub-housing 102 along the line D-D in Figure 14 a sectional view of the third sub-housing 103 and the second sub-housing 102 along the line D-D in Figure 16 an enlarged view of the third sub-housing 103 and the second sub-housing 102 circled E in Figure 15 an enlarged view of the third sub-housing 103 and the second sub-housing 102 circled E in Figure 17 a plan view of the safety gasket of the electromagnetic valve provided for at least one embodiment of the present disclosure.

[0081] For example, in some embodiments, as shown in Figure 1 , Figure 7 and Figures 12-16 the third sub-housing 103 comprises a first extension portion 1031 and a second extension portion 1032, and the first fluid path P1 comprises a first sub-path P11 and a second sub-path P12; the first extension portion 1031 extends along the axial direction X to form the first sub-path P11 of the first fluid path P1 with the second sub-housing 102; and the second extension portion 1032 extends perpendicular to the axial direction X to form the second sub-path P12 of the first fluid path P1 with the second sub-housing 102, and the second sub-housing 102 comprises a second fluid path P2, as shown in Figure 7As shown, the second fluid path P2 has a first fluid inlet P21 and a second fluid outlet P22, the first fluid inlet P21 communicates with the second sub-path P12, so that the fluid in the second sub-path P12 can enter the second fluid path P2 through the first fluid inlet P21 and flow out of the electromagnetic valve from the second fluid outlet P22, realizing oil return.

[0082] Therefore, when the electromagnetic valve realizes pressure balance and flow adjustment of the internal cavity of the pilot valve under different working currents, due to the arrangement of the first fluid path P1 and the second fluid path P2 and the short path, the steady-state and dynamic adjustment of the pilot valve is more rapid.

[0083] For example, in some embodiments, as shown in Figures 10-11 As shown, a groove 102A with an L-shaped cross section is formed in the second sub-housing 102, so that after the second sub-housing 102 and the third sub-housing 103 are assembled, the second sub-housing 102 and the third sub-housing 103 have a gap at the groove 102A to form the first sub-path P11 and the second sub-path P12. For example, as shown in Figures 8-10 As shown, the second sub-housing 102 also has a third fluid path P3 in communication with the second fluid outlet P22, for example, the third fluid path P3 can be a groove extending along the axis direction X on the outer surface of the second sub-housing 102, so that the fluid flowing out of the second fluid outlet P22 can flow out of the electromagnetic valve along the third fluid path P3.

[0084] For example, in some embodiments, as shown in Figure 1 and Figure 7 As shown, the first extension portion 1031 and the second extension portion 1032 of the third sub-housing 103 form a side wall with an L-shaped cross section, which forms a containing space for the electromagnet 400, so that the electromagnet 400 can be arranged in the containing space formed by the first extension portion 1031 and the second extension portion 1032, and the electromagnetic valve as a whole has a regular cylindrical shape, for example, a circular cylindrical shape.

[0085] For example, the electromagnet 400 includes a metal coil, for example, a copper coil, which controls the valve rod 300 through magnetic force, for example, the electromagnet 400 is fixed in the containing space formed by the first extension portion 1031 and the second extension portion 1032 through the support frame 402, and the support frame 402 has a U-shaped cross section. For example, the electromagnet 400 is electrically connected to the external circuit through the electrical socket 701, and the support frame 402 is positioned and fixed through the positioning column 702.

[0086] For example, in some embodiments, as shown in Figure 1 and Figure 7 As shown, the first extension portion 1031 of the third sub-housing 103 is spaced apart from the first sub-housing 101 and forms a mounting portion, as shown in Figure 7As shown by the dashed circle in FIG. 1, the mounting portion is configured to mount the magnetic isolation ring 401, and in the direction perpendicular to the axial direction X, the orthographic projection of the first valve port H1 on the magnetic isolation ring 401 is located inside the magnetic isolation ring 401. For example, a recess is formed on the side of the first extension portion 1031 and the first sub-housing 101 away from the valve rod 300, and the recess constitutes the mounting portion to accommodate and fix the magnetic isolation ring 401. Thus, the magnetic isolation ring 401 is spaced between the first extension portion 1031 of the third sub-housing 103 and the first sub-housing 101, and forms a side wall with the first extension portion 1031 and the first sub-housing 101, so that the fluid flowing out of the first valve port H1 is guided into the first fluid path P1.

[0087] For example, in some embodiments, as shown in FIGS. 1 and 2, the housing 100 further comprises a fourth sub-housing 104, and the fourth sub-housing 104 covers and surrounds the electromagnet 400. Figure 1 and Figure 2 For example, in some embodiments, as shown in FIGS. 1 and 2, the housing 100 further comprises a fourth sub-housing 104, and the fourth sub-housing 104 covers and surrounds the electromagnet 400.

[0088] For example, in some embodiments, as shown in FIGS. 1 and 2, the housing 100 further comprises a fourth sub-housing 104, and the fourth sub-housing 104 covers and surrounds the electromagnet 400. Figure 13 and Figures 15-17 For example, in some embodiments, as shown in FIGS. 1 and 2, the housing 100 further comprises a fourth sub-housing 104, and the fourth sub-housing 104 covers and surrounds the electromagnet 400.

[0089] For example, when the current of the solenoid valve is less than the target current, the solenoid valve is in the fail-safe mode, at this time, the safety washer 111 is pressed tightly to the mating plane (upper surface) of the second portion 1022 of the second sub-housing 102 by the upper reset spring 112, thereby the safety washer 111 completely covers the first fluid inlet P21, and the fluid can only flow out through the openings V1 of the safety washer 111, and the flow is very small, thereby generating a back pressure on the valve rod 300, so that the solenoid valve realizes the fail-safe mode.

[0090] For example, different safety mode pressures can be achieved by adjusting the size and number of the openings V1. For example, in the state of power failure of the solenoid valve, the pressure can be adjusted by the flow through the openings V1 of the safety washer 111, which is smaller than that in the normal working state, so as not to completely disable the solenoid valve, thereby realizing the power failure protection, and ensuring the basic driving and steering safety in the case of power failure or driver failure of the solenoid valve.

[0091] For example, the size (aperture) of each opening V1 is not greater than about 0.2 mm, for example, 0.1 mm ~ 0.3 mm. The size of each opening V1 is not limited, and those skilled in the art can design according to different flow and pressure settings. For example, the opening V1 can be a circular hole, a square hole, so as to facilitate manufacturing and design calculation. Alternatively, the small hole can also be other regular patterns and irregular patterns, and the shape of the small hole is not limited in the embodiments of the present disclosure. For example, the number of openings V1 can be one or more, for example, two, three, four, five, six, seven, eight, etc. The number of openings V1 can be selected according to the needs, and the embodiments of the present disclosure do not make specific limitations.

[0092] For example, when the current of the electromagnetic valve is equal to or greater than the target current, the electromagnetic valve is in normal working mode, the safety pad 111 is subjected to the electromagnetic attraction force to overcome the pressing force of the reset spring 7, and is tightly attached to the matching plane (lower surface) of the second extension part 1032 of the third sub-housing 103. At this time, the safety pad 111 opens the first fluid inlet P21, or in other words, a sufficient gap is formed between the safety pad 111 and the first fluid inlet P21, so that the fluid flows freely, so that the electromagnetic valve enters the normal mode.

[0093] The above failure protection structure provided by the embodiments of the present disclosure has the advantages of simple structure, fewer parts, simple adjustment process, higher reliability, and lower cost.

[0094] For example, Figure 18 A perspective view of the main valve body of the electromagnetic valve provided by at least one embodiment of the present disclosure is shown in Figure 19 A top view of the electromagnetic valve in Figure 18 Figure 20 A cross-sectional view of the electromagnetic valve along the F-F line in Figure 19 Figure 1 As shown in Figures 18-20 and Figure 1 , Figures 10-11 and Figure 15 , the main valve body 200 includes a cavity T4 in communication with the first fluid passage T1, as shown in Figure 1 The electromagnetic valve further includes a passive valve body 500, and the passive valve body 500 is arranged in the third containing space S3.

[0095] For example, as shown in Figure 1 ​​As shown, the passive valve body 500 includes a second valve port H2, a third valve port H3, and a spacer 501. The second valve port H2 is located in the middle of the passive valve body 500, and the third valve port H3 at least partially surrounds the second valve port H2. The spacer 501 is located between the second valve port H2 and the third valve port H3 to separate them. A controllable overflow valve port H4 is formed between the spacer 501 and the main valve body 200. When the overflow valve port H4 is opened, it connects the third valve port H3 and the cavity T4. Thus, the fluid in the cavity T4 can flow out of the cavity T4 through the overflow valve port H4, thereby stabilizing the pressure inside the solenoid valve. For example, the fluid flowing out from the overflow valve port H4 can be discharged from the solenoid valve through the third valve port H3.

[0096] For example, in some embodiments, such as Figure 1 and Figures 18-20 As shown, the main valve body 200 may further include a force-receiving portion 203 extending into the third receiving space along a direction perpendicular to the axis X, with the third valve port H3 exposing the force-receiving portion 203. Thus, fluid entering through the third valve port H3 can exert pressure on the force-receiving portion 203, for example, generating an upward thrust. When the thrust is sufficiently large, for example, greater than the downward force on the main valve body 200, the main valve body 200 moves upward, the overflow valve port H4 is opened, forming a fluid passage. Fluid entering through the third valve port H3 can pass through the overflow valve port H4 and flow out through the second valve port H2, thus achieving the function of a one-way valve.

[0097] Therefore, the main valve body 200 has the functions of both a main valve and a check valve. When applied to a dual-valve vibration damper, it can eliminate the need for an additional check valve, thus saving costs.

[0098] For example, Figure 21 This is a perspective view of another main valve body of the solenoid valve provided in at least one embodiment of the present disclosure. Figure 22 for Figure 21 Top view of the solenoid valve in the image. Figure 23 for Figure 22 A schematic diagram of the cross-section of the solenoid valve along line GG in the figure; in other embodiments, such as... Figures 21-23 As shown, the solenoid valve 200 may also exclude the force-receiving part 203. In this case, the main valve body 200 does not have the function of a check valve.

[0099] For example, in some embodiments, such as Figure 1 As shown, the solenoid valve may also include a pressure reducing valve 600, which is continuously disposed in the cavity T4 and the second valve port H2, and can regulate the flow rate of the fluid between the cavity T4 and the second valve port H2.

[0100] For example, the pressure reducing valve 600 comprises a rivet 601, an elastic member 602, a support plate 603, and at least one gasket 604. For example, the rivet 601 is arranged in the cavity T4 and the second valve port H2 in sequence, the elastic member 602 is arranged in the cavity T4 at least, and arranged at the end of the rivet 601 close to the valve rod 300. For example, the elastic member 602 can be fixed at the end of the rivet 601 close to the valve rod 300 by a pressing plate 605. For example, the elastic member 602 can be in the form of a wave spring, Figure 24 A structure diagram of the wave spring provided by at least one embodiment of the present disclosure is shown, Figure 25 A side view of the wave spring is shown, in combination with Figure 1 and Figures 24-25 The wave spring can be compressed in the axial direction X to provide resistance by elasticity. For example, the stiffness of the wave spring can be designed according to requirements to provide corresponding elastic force for different use scenarios, and achieve different pressure reducing effects.

[0101] For example, as Figure 1 shown, the support plate 603 is arranged at the side of the elastic member 602 away from the valve rod 300 and is slidingly connected to the rivet 601, and the at least one gasket 604 is arranged at the side of the support plate 603 away from the valve rod 300 and is slidingly connected to the rivet 601, and the gasket 604 covers the second valve port H2. For example, Figure 26 A structure diagram of the gasket of the pressure reducing valve provided by at least one embodiment of the present disclosure is shown, as Figure 26 shown, the gasket 604 comprises at least one opening V2.

[0102] For example, the number of gaskets 604 can be multiple, for example, 2-10, for example, 3, 4, 5, 6, 8, or 10, etc. For example, each gasket 604 comprises at least one opening V2, for example, multiple openings V2, and the size and number of the openings V2 can be set according to requirements.

[0103] For example, when the pressure generated by the fluid flowing from the second valve port H2 is small, the pressure is not enough to move the gasket 604 upward, at this time, the fluid flowing from the second valve port H2 can flow into the cavity T4 from the opening V2 in the gasket 604; when the pressure generated by the fluid flowing from the second valve port H2 is large enough to move the gasket 604 upward, the gasket 604 opens the second valve port H2, a gap is generated between the gasket 604 and the spacing portion 501, and the fluid can flow into the cavity T4 through the gap, at this time, the gasket 604 and the support plate 603 move upward and abut against the elastic member 602, and the elastic force of the elastic member 602 limits the displacement of the gasket 604 to adjust the gap between the gasket 604 and the spacing portion 501, and achieve pressure reduction.

[0104] For example, the threshold pressure required for the gasket 604 to move up can be adjusted by adjusting the number of gaskets 604 and the size and number of the openings V2, thereby achieving different pressure reduction effects.

[0105] For example, in some embodiments, as shown in Figure 1 and Figure 7 The first sub-housing 101 further includes a fourth accommodation space S4 in communication with the first accommodation space S1 and located on the side of the first accommodation space S1 away from the second accommodation space S2, as shown in Figure 7 The fourth accommodation space S4 has a fourth diameter D4, which is smaller than the first diameter D1. The second rod end portion 302 is connected to the side of the first rod portion 303 away from the second rod portion 304 and is at least partially located in the fourth accommodation space S4. The second rod end portion 302 has a fifth rod diameter L5, as shown in Figure 6 The fifth rod diameter L5 is smaller than the first rod diameter L1 and slightly smaller than the fourth diameter D4 to form a gap between the second rod end portion 302 and the side wall of the fourth accommodation space S4 for fluid flow.

[0106] Next, the working process of the electromagnetic valve will be described in combination with the above specific structure of the electromagnetic valve.

[0107] As shown in Figure 1 The fluid can enter the electromagnetic valve through the second valve port H2. At this time, the fluid enters the cavity T4 through the second valve port H2. Then, the fluid enters the first fluid passage T1 through the first rod end portion 301 of the valve rod 300 and flows upward along the first fluid passage T1 into the fourth accommodation space S4. The second rod end portion 302 of the valve rod 300 has a gap with the side wall of the fourth accommodation space S4. The fluid flows through the gap to the second fluid passage T2. Then, part of the fluid enters the first fluid path P1 from the first fluid outlet 300A and the first valve port H1 through the third fluid passage T3, then enters the second fluid path P2 through the safety gasket 111, and flows out of the electromagnetic valve from the second fluid outlet P22. Another part of the fluid in the second fluid passage T2 flows downward through the second fluid passage T2 to the accommodation cavity S0 and the space above the upper surface 202 of the main valve body 200.

[0108] For example, when the electromagnet 400 is applied with current, an upward electromagnetic force is generated on the valve rod 300, the main body part 3041 and the lower surface of the narrowed part 3042 of the second rod part 304 of the valve rod 300 and the lower surface of the first rod end part 301 are subjected to upward pressure; the second rod end part 302 and the upper surface of the first rod part 301 of the valve rod 300 are subjected to downward pressure, and the pressures constitute a balance, thereby controlling the opposite area of the first fluid outlet 300A of the valve rod 300 and the first valve port H1, further controlling the fluid flow between the first fluid outlet 300A and the first valve port H1, thereby further controlling the opening size of the overflow valve port H4, further adjusting the flow of the overflow valve port H4, and realizing pressure control. At this time, the resultant force of the multiple surfaces of the valve rod 300 and the electromagnetic force together play a control role on the pilot valve.

[0109] That is, the electromagnetic valve can realize pressure balance and flow adjustment in the internal cavity of the pilot valve under different working currents, and due to the arrangement of the first fluid path P1 and the second fluid path P2, the steady state and dynamic adjustment of the pilot valve is more rapid; in addition, the overflow valve port H4 can be generated under pressure balance, overflow is generated, and the pressure inside the electromagnetic valve is adjusted.

[0110] It should be noted that the fluid in the embodiment of the present disclosure can be oil, and of course, the fluid is not limited to oil, but can be any liquid, or can be a gas.

[0111] In summary, in the embodiment of the present disclosure, the electromagnetic valve realizes pressure and flow adjustment capability under different currents through the pilot valve; the fluid passage composed of the first fluid path P1 and the second fluid path P2 is introduced, so that the steady state and dynamic adjustment of the valve is more rapid; the failure protection structure of the electromagnetic valve is simpler, can more efficiently realize the protection function, reduce the cost, and improve the reliability. In some embodiments, the main valve body can also realize the function of the reverse check valve through the design of the stress receiving part, so as to realize multi-functional integration through small volume, and when applied to a double valve shock absorber, one check valve can be reduced, thereby reducing the cost.

[0112] The at least one embodiment of the present disclosure also provides a shock absorber, which comprises the electromagnetic valve provided by the embodiment of the present disclosure, and the shock absorber can effectively adjust the pressure of the fluid entering the electromagnetic valve during operation. For example, the shock absorber can be a shock absorber of a mechanical device, for example, a shock absorber of a vehicle. The shock absorber can realize continuous adjustable damping under the driving of working current, and can also keep safe in the case of power failure or driver failure, thereby ensuring the basic driving and steering safety.

[0113] The following points need to be explained:

[0114] (1) The drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can be referred to the general design.

[0115] (2) In the drawings used to describe the embodiments of the present disclosure, the thickness of a layer or region is exaggerated or reduced for clarity, i.e., these drawings are not drawn according to the actual scale.

[0116] (3) In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined to obtain new embodiments.

[0117] The above merely describes exemplary embodiments of the present application, but is not intended to limit the protection scope of the present application, which is defined by the appended claims.

Claims

1. An electromagnetic valve comprising: a housing comprising a first accommodating space and a second accommodating space arranged along an axial direction, wherein the first accommodating space comprises a first valve port arranged along a circumferential direction, a main valve body arranged at least in the second accommodating space and comprising a connection hole, a valve stem arranged at least in the first accommodating space and comprising a first stem end and a second stem end opposite to each other along the axial direction, the first stem end extending into the second accommodating space and being connected to the connection hole in a sliding manner, and an electromagnet arranged outside the first accommodating space and at least partially surrounding the first valve port; wherein the valve stem and a part of the housing surrounding the valve stem form a pilot valve, the main valve body and another part of the housing surrounding the main valve body form a main valve, the valve stem comprises a first fluid outlet opposite to the first valve port, and the valve stem is configured to be controlled to move along the axial direction to adjust a facing area of the first fluid outlet and the first valve port.

2. The electromagnetic valve according to claim 1, wherein The housing comprises a first sub-housing and a second sub-housing arranged along the axial direction, and the first sub-housing and the second sub-housing are spaced apart to form the first valve port.

3. The electromagnetic valve according to claim 2, wherein The valve stem comprises: a first fluid passage extending along the axial direction and penetrating the first stem end and the second stem end, a second fluid passage extending along the axial direction and located on one side of the first fluid passage, and a third fluid passage connected to the second fluid passage and extending in a direction perpendicular to the axial direction, and comprising the first fluid outlet.

4. The electromagnetic valve according to claim 3, wherein The second sub-housing comprises: a first part configured to form the first accommodating space together with the first sub-housing, wherein the first accommodating space has a first diameter at the first part, and a second part configured to form the second accommodating space, and the second accommodating space has a second diameter, the second diameter is greater than the first diameter.

5. The electromagnetic valve according to claim 4, wherein The first accommodating space has a third diameter at the first sub-housing, and the third diameter is greater than the first diameter and less than the second diameter.

6. The electromagnetic valve according to claim 4, wherein The valve stem comprises: a first stem part located at least partially in the first accommodating space formed by the first sub-housing and having a first stem diameter, a second stem part located at least partially in the first accommodating space formed by the second sub-housing, wherein the second stem part has a main body part and a narrowed part located on a side of the main body part away from the first stem part, the main body part has a second stem diameter, and the narrowed part has a third stem diameter, and the second stem diameter is greater than the third stem diameter, the second fluid passage penetrates the first stem part and the main body part of the second stem part.

7. The electromagnetic valve according to claim 6, wherein The third fluid passage is located in the first stem part, the first stem diameter is greater than the second stem diameter to form a first step limiting part at a connection between the first stem part and the second stem part, and the first step limiting part cooperates with an end of the first part of the second sub-housing close to the first sub-housing to limit a movement limit of the valve stem towards the main valve body.

8. The electromagnetic valve according to claim 6, wherein the first stem end is connected to a side of the narrowed part away from the main body part, The first rod end is at least partially located in a second accommodating space formed by the second sub-housing, and has a fourth rod diameter, wherein the third rod diameter is greater than the fourth rod diameter.

9. The electromagnetic valve according to claim 6, wherein The narrowed portion and a side wall of the first portion of the second sub-housing form a receiving cavity, and the second fluid passage communicates with the second accommodating space through the receiving cavity.

10. The electromagnetic valve according to claim 8, wherein The third rod diameter is greater than the fourth rod diameter to form a second step limiting portion at a connection between the narrowed portion and the first rod end, A first surface of the main valve body close to the first accommodating space is provided with a return spring, and the return spring is limited between the first surface and the narrowed portion by the second step limiting portion.

11. The electromagnetic valve according to any one of claims 2 to 10, wherein The housing further comprises a third sub-housing spaced from the first sub-housing along the axial direction to expose the first valve port, The third sub-housing is adjacent to the second sub-housing and has a gap to form a first fluid path communicating with the first valve port between the second sub-housing and the third sub-housing.

12. The electromagnetic valve according to claim 11, wherein The third sub-housing comprises: a first extension portion extending along the axial direction to form a first sub-path of the first fluid path with the second sub-housing, and a second extension portion extending perpendicularly to the axial direction to form a second sub-path of the first fluid path with the second sub-housing, wherein the second sub-housing comprises a second fluid path having a first fluid inlet and a second fluid outlet, and the first fluid inlet communicates with the second sub-path.

13. The electromagnetic valve according to claim 12, wherein The electromagnet is arranged in a groove formed by the first extension portion and the second extension portion.

14. The electromagnetic valve of claim 12, further comprising: a safety washer and a return spring arranged at the first fluid inlet, wherein the return spring is arranged between the electromagnet and the safety washer, and the safety washer comprises at least one aperture, and the safety washer is configured to control the flow rate of the first fluid inlet under the electromagnetic force of the electromagnet and the elastic force of the return spring.

15. The solenoid valve according to claim 12, wherein The first extension portion of the third sub-housing is spaced from the first sub-housing and forms a mounting portion configured to mount a magnetic shielding ring, wherein a normal projection of the first valve port on the magnetic shielding ring is located inside the magnetic shielding ring.

16. The electromagnetic valve according to claim 3, wherein The main valve body comprises a cavity communicating with the first fluid passage, The second sub-housing further comprises a third accommodating space communicating with the second accommodating space and located on a side of the second accommodating space away from the first accommodating space, The electromagnetic valve further comprises: a passive valve body arranged in the third accommodating space and comprising: a second valve port, a third valve port at least partially surrounding the second valve port, and a spacing portion between the second valve port and the third valve port, wherein the spacing portion and the main valve body form a controlled openable or closable overflow valve port, and the overflow valve port is opened to communicate the third valve port and the cavity.

17. The solenoid valve according to claim 16, wherein The main valve body further comprises a force receiving portion extending into the third accommodating space along a direction perpendicular to the axial direction, and the third valve port exposes the force receiving portion.

18. The solenoid valve of claim 16, further comprising: a pressure reducing valve arranged in series in the cavity and the second valve port. The pressure reducing valve comprises: rivets arranged in the cavity and the second valve port in succession, a resilient member arranged in at least the cavity and at an end of the rivet close to the valve rod, a support plate arranged at a side of the resilient member away from the valve rod and slidingly connected to the rivet, and at least one gasket arranged at a side of the support plate away from the valve rod and slidingly connected to the rivet, covering the second valve port, wherein each of the at least one gasket comprises at least one opening.

19. The electromagnetic valve according to claim 6, wherein The first sub-housing further comprises a fourth receiving space in communication with the first receiving space and located at a side of the first receiving space away from the second receiving space, the fourth receiving space having a fourth diameter, the fourth diameter being smaller than the first diameter, the second rod end is connected to a side of the first rod portion away from the second rod portion, at least partially located in the fourth receiving space, and has a fifth rod diameter, the fifth rod diameter being smaller than the first rod diameter.

20. A shock absorber comprising the electromagnetic valve according to any one of claims 1-19.

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