Solenoid valve and damper

Abstract

An electromagnetic valve and a shock absorber, the electromagnetic valve comprising a main relief valve portion, the main relief valve portion comprising a first housing, a relief valve seat, a relief valve body, a first passage, and a one-way push piece; the relief valve seat being at least partially located within the first housing, the relief valve body being located within the first housing and on one side of the relief valve seat in a first direction; the first passage being at least partially located on an outer side of the relief valve body proximate to the first housing, the one-way push piece being located in the first passage and connected to the relief valve body, comprising a force receiving surface facing an opening of the first passage, and being configured to move in the first direction under the action of a pushing force applied by a fluid from the opening to drive the relief valve body to move in the first direction to form a first relief valve port between the relief valve body and the relief valve seat.

Description

TECHNICAL FIELD

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

[0002] In an automobile suspension system, since the spring also reciprocates when filtering road vibrations, a shock absorber is usually installed in the suspension system to suppress the oscillation of the spring when it rebounds after absorbing the shock, so as to improve the smoothness of the automobile.

[0003] On the other hand, with the rapid development of the automobile industry and the continuous improvement of people's living standards, people's demand for the comfort of the automobile is getting higher and higher, and the single damping value of the shock absorber cannot meet people's needs, so the shock absorber with adjustable damping value has emerged as the times require. SUMMARY

[0004] At least one embodiment of the present disclosure provides an electromagnetic valve, which includes a main overflow valve part, the main overflow valve part including a first housing, an overflow valve seat, an overflow valve body, a first channel, and a one-way push piece; the overflow valve seat is at least partially located in the first housing, the overflow valve body is located in the first housing and on one side of the overflow valve seat in a first direction; the first channel is at least partially located on the outer side of the overflow valve body close to the first housing, and the one-way push piece is located in the first channel and connected with the overflow valve body, including a force receiving surface facing an opening of the first channel, and is configured to move in the first direction under the action of the thrust force from the fluid in the opening to drive the overflow valve body to move in the first direction to form a first overflow valve port between the overflow valve body and the overflow valve seat.

[0005] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the overflow valve body includes an annular valve body part around the first direction, and the annular valve body part has a first end close to the overflow valve seat in the first direction; the one-way push piece is connected with the first end of the annular valve body part and protrudes from the annular valve body part in a second direction, and the second direction intersects the first direction.

[0006] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the one-way push piece and the annular valve body part constitute a continuous one-piece structure.

[0007] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the first channel comprises a first sub-cavity and a second sub-cavity which are in communication with each other, the first sub-cavity has a first radial dimension, the second sub-cavity has a second radial dimension which is greater than the first radial dimension; the opening is an opening of the first sub-cavity which is in communication with the second sub-cavity, the fluid enters the second sub-cavity via the first sub-cavity and the opening, and the force receiving surface of the one-way push piece is located in the second sub-cavity and faces the opening.

[0008] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the force receiving surface is substantially perpendicular to the first direction.

[0009] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the force receiving surface of the one-way push piece overlaps with a part of the opening of the first channel in the first direction; or the force receiving surface of the one-way push piece overlaps with the entire opening of the first channel in the first direction; or the force receiving surface of the one-way push piece does not overlap with the opening of the first channel in the first direction.

[0010] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the one-way push piece is a closed ring structure around the first direction; or the one-way push piece is an unclosed arc structure around the first direction.

[0011] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the first channel comprises a first cavity located on a first side of the one-way push piece and a second cavity located on a second side of the one-way push piece in the first direction, the one-way push piece has a gap between the one-way push piece and an inner wall of the first channel which is opposite to the overflow valve body, and the first cavity and the second cavity are in communication via the gap.

[0012] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the overflow valve seat comprises a second channel, a third channel, and a separation portion located between the second channel and the third channel; the second channel is located on an inner side of the annular valve body portion which is away from the shell; the third channel constitutes a part of the first channel and comprises the first sub-cavity and the second sub-cavity.

[0013] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the overflow valve seat further comprises an outer ring portion, the outer ring portion is located on a side of the third channel which is away from the separation portion and is fixed with the first shell, and the outer ring portion and the separation portion define the third channel.

[0014] For example, the solenoid valve provided by an embodiment of the present disclosure further comprises a pilot valve part, the pilot valve part comprises a second housing and a pilot valve located in the second housing; the pilot valve part is arranged on a side of the main spill valve part away from the spill valve seat in the first direction, the main spill valve part further comprises a fourth channel between the first housing and the spill valve body, the fourth channel is located on a side of the first channel close to the pilot valve part in the first direction and communicates with the first channel; the spill valve body comprises a pilot valve port and a first valve body part, the first valve body part surrounds the pilot valve port, the pilot valve is arranged in cooperation with the pilot valve port, the pilot valve part further comprises a floating ring and a pressure relief structure, the floating ring is configured to form a pilot valve cavity with the spill valve body; the floating ring is configured to be movable in the first direction so that the pilot valve cavity communicates with the fourth channel through the pressure relief structure.

[0015] For example, the solenoid valve provided by an embodiment of the present disclosure further comprises a pilot valve part, the pilot valve part comprises a second housing and a pilot valve located in the second housing; the pilot valve part is arranged on a side of the main spill valve part away from the spill valve seat in the first direction, the main spill valve part further comprises a fourth channel between the first housing and the spill valve body, the fourth channel is located on a side of the first channel close to the pilot valve part in the first direction and communicates with the first channel; the spill valve body comprises a pilot valve port and a first valve body part, the first valve body part surrounds the pilot valve port, the pilot valve is arranged in cooperation with the pilot valve port, the pilot valve part further comprises a floating ring and a pressure relief structure, the floating ring is configured to form a pilot valve cavity with the spill valve body; the floating ring is configured to be movable in the first direction so that the pilot valve cavity communicates with the fourth channel through the pressure relief structure.

[0016] For example, the solenoid valve provided by an embodiment of the present disclosure further comprises a pilot valve part, the pilot valve part comprises a second housing and a pilot valve located in the second housing; the pilot valve part is arranged on a side of the main spill valve part away from the spill valve seat in the first direction, the main spill valve part further comprises a fourth channel between the first housing and the spill valve body, the fourth channel is located on a side of the first channel close to the pilot valve part in the first direction and communicates with the first channel; the spill valve body comprises a pilot valve port and a first valve body part, the first valve body part surrounds the pilot valve port, the pilot valve is arranged in cooperation with the pilot valve port, the pilot valve part further comprises a floating ring and a pressure relief structure, the floating ring is configured to form a pilot valve cavity with the spill valve body; the floating ring is configured to be movable in the first direction so that the pilot valve cavity communicates with the fourth channel through the pressure relief structure.

[0017] For example, the solenoid valve provided by an embodiment of the present disclosure further comprises: an electromagnetic driving part, the electromagnetic driving part is located on a side of the pilot valve part away from the main spill valve part; the electromagnetic driving part comprises an armature support, the armature support is configured to apply a force away from the first valve body part to the floating ring to move the floating ring away from the overflow gasket when magnetized.

[0018] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the overflow valve body is further configured to be movable in the first direction to form a second overflow valve port between the annular valve body and the partition portion under the action of the force applied by the armature, the pressure in the pilot valve cavity, and the pressure between the first valve body portion and the second valve body portion.

[0019] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the pilot valve cavity is in communication with the fourth channel through the pressure relief structure when the armature is configured to be in a position closest to the overflow valve body without being magnetized.

[0020] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the pilot valve portion further comprises a flow pad located between the first valve body portion of the overflow valve body and the floating ring, the floating ring is configured to press the flow pad against the first valve body portion, and the pressure relief structure comprises a pressure relief opening on the flow pad.

[0021] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the main overflow valve portion further comprises a stop spring arranged between the first housing and the first valve body portion and located on the side of the one-way push piece away from the overflow valve seat in the first direction.

[0022] At least one embodiment of the present disclosure further provides a shock absorber comprising any one of the electromagnetic valves provided by the embodiments of the present disclosure.

[0023] For example, the shock absorber provided by an embodiment of the present disclosure comprises a first cylinder, a second cylinder, and a third cylinder; the inside of the first cylinder is provided with a piston assembly; the second cylinder is arranged outside the first cylinder to form a first fluid channel with the first cylinder; and the third cylinder is arranged outside the second cylinder to form a second fluid channel with the second cylinder. The recovery valve of the shock absorber is the electromagnetic valve; during the recovery process of the shock absorber, fluid enters the first liquid inlet of the recovery valve from the second fluid channel, the one-way push piece is driven to move in the first direction under the action of the pushing force applied by the fluid entering the first liquid inlet of the recovery valve, and the overflow valve body is driven to move in the first direction, forming the first overflow valve port, and the fluid enters the first liquid outlet of the recovery valve through the first overflow valve port, and then flows out of the recovery valve from the first liquid outlet to the first fluid channel.

[0024] For example, in the damper provided by an embodiment of the present disclosure, the compression valve of the damper is the electromagnetic valve; the damper performs the compression process, the fluid enters the second inlet of the compression valve from the first fluid passage, a part of the fluid entering the second inlet of the compression valve flows through the first path in the compression valve and finally flows out from the second outlet of the compression valve to the second fluid passage, another part of the fluid entering the second inlet of the compression valve flows through the second path in the compression valve and finally flows out from the second outlet of the compression valve to the second fluid passage; and the fluid enters the first inlet of the recovery valve from the second fluid passage, the one-way push piece is driven to move in the first direction by the pushing force of the fluid entering the first inlet of the recovery valve, so as to drive the overflow valve body to move in the first direction, to form the first overflow valve port, and the fluid enters the first outlet of the recovery valve through the first overflow valve port, and then flows out from the first outlet of the recovery valve to the first fluid passage. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described in the following description are only some of the embodiments of the present application and not a limitation of the present application.

[0026] Figure 1 is a structural schematic diagram of an electromagnetic valve provided by an embodiment of the present disclosure;

[0027] Figure 2 is Figure 1 is a partial enlarged schematic diagram of the electromagnetic valve shown in the figure, which includes a one-way push piece and an overflow valve body;

[0028] Figure 3 is a structural schematic diagram of the one-way push piece of the electromagnetic valve provided by an embodiment of the present disclosure;

[0029] Figure 4 is a structural schematic diagram of the one-way push piece of the electromagnetic valve provided by an embodiment of the present disclosure;

[0030] Figure 5 is a structural schematic diagram of the one-way push piece of the electromagnetic valve provided by an embodiment of the present disclosure;

[0031] Figure 6 is a structural schematic diagram of the one-way push piece of the electromagnetic valve provided by an embodiment of the present disclosure;

[0032] Figure 7 is a structural schematic diagram of the one-way push piece of the electromagnetic valve provided by an embodiment of the present disclosure;

[0033] Figure 8 isFigure 7 Figure 1 is a partial enlarged schematic view of an electromagnetic valve provided by an embodiment of the present disclosure;

[0034] Figure 9 Figure 2 is a schematic view of fluid flow during compression when the electromagnetic valve provided by an embodiment of the present disclosure is used as a compression valve of a shock absorber;

[0035] Figure 10 Figure 3 is a partial enlarged schematic view of an electromagnetic valve provided by an embodiment of the present disclosure. Figure 9 Figure 1 is a partial enlarged schematic view of an electromagnetic valve provided by an embodiment of the present disclosure; DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely below with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0037] Unless otherwise defined, technical terms or scientific terms used herein should be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms "first", "second", and similar terms used in the description and the claims of the present patent application do not necessarily mean any order, number, or importance, but are only used to distinguish different components. The terms "include", "contain", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "in", "out", "up", "down", and the like only represent relative positional relationships, which may change accordingly when the absolute positions of the described objects change.

[0038] The drawings in the present disclosure are not strictly drawn to scale, and the specific sizes and quantities of various structures can be determined according to actual needs. The drawings described in the present disclosure are only structural schematic views.

[0039] The features "parallel", "perpendicular", and "same" and the like used in the present disclosure include the strictly "parallel", "perpendicular", "same" and the like, and the "substantially parallel", "substantially overlapping", "substantially same" and the like with certain errors, which are within the acceptable deviation range for a specific value determined by those of ordinary skill in the art, considering the measurement and the error related to the measurement of a specific quantity (for example, the limitation of the measurement system). For example, "substantially" can mean within one or more standard deviations, and unless otherwise specified, it can mean within 10% or 5% deviation of the value.

[0040] With the development of automobile electricization and automatic driving technology, the weight of the automobile increases, and the power performance is also improved, so the shock absorber needs to work in a wider range, and the damping characteristics of the shock absorber need to be continuously adjustable. To this end, an electromagnetic valve with continuously adjustable damping can be used to achieve continuous adjustment of the damping characteristics of the shock absorber.

[0041] At least one embodiment of the present disclosure provides an electromagnetic valve, which includes a main overflow valve part, the main overflow valve part including a first housing, an overflow valve seat, an overflow valve body, a first channel, and a one-way push piece; the overflow valve seat is at least partially located in the first housing, the overflow valve body is located in the first housing and on one side of the overflow valve seat in a first direction; the first channel is at least partially located on the outer side of the overflow valve body close to the first housing, and the one-way push piece is located in the first channel and connected with the overflow valve body, including a force receiving surface facing the opening of the first channel, and is configured to move in the first direction under the action of the thrust force applied by the fluid from the opening to drive the overflow valve body to move in the first direction to form a first overflow valve port between the overflow valve body and the overflow valve seat. The electromagnetic valve provided by the embodiment of the present disclosure can be used in a shock absorber. The shock absorber provided by the embodiment of the present disclosure can be used in any device that needs damping, such as a driving vehicle. The shock absorber can continuously adjust the damping of the fluid by controlling the electromagnetic force, and can also drive the one-way push piece to move in the first direction by using the thrust force applied by the fluid entering the electromagnetic valve to the one-way push piece, thereby driving the overflow valve body connected with the one-way push piece to move in the first direction to form a first overflow valve port between the overflow valve body and the overflow valve seat, forming another channel for applying damping to the fluid, so that the formation of the first overflow valve port can be controlled without relying on the electromagnetic force, and the adjustment ability of the electromagnetic valve for applying damping to the fluid is increased.

[0042] The embodiment of the present disclosure also provides a shock absorber, which includes any one of the electromagnetic valves provided by the embodiments of the present disclosure. The shock absorber has stronger adjustment ability for applying damping to the fluid.

[0043] Exemplarily, Figure 1 is a structural schematic diagram of an electromagnetic valve provided by an embodiment of the present disclosure; Figure 2 is Figure 1 is a partial enlarged schematic diagram of the electromagnetic valve shown in FIG. 1, which includes a one-way push piece and an overflow valve body. Referring to Figure 1The electromagnetic valve 400 provided by the embodiments of the present disclosure comprises: a main overflow valve part 100 comprising a first housing 110, an overflow valve seat 130, an overflow valve body 120, a first channel 134, and a one-way push piece 101. A part of the overflow valve seat 130 is located in the first housing 110 (of course, in other embodiments, the entire overflow valve seat 130 can be located in the first housing 110), the overflow valve body 120 is located in the first housing 110 and on one side of the overflow valve seat 130 in the first direction X. The first channel 134 is at least partially located on the outer side of the overflow valve body 120 close to the first housing 110, the one-way push piece 101 is located in the first channel 134 and connected with the overflow valve body 120, the one-way push piece 101 comprises a force receiving surface 101s facing an opening 134a of the first channel 134 and is configured to be driven to move along the first direction X to drive the overflow valve body 120 to move along the first direction X under the action of a pushing force applied by the fluid from the opening 134a, so as to form a first overflow valve port 140 between the overflow valve body 120 and the overflow valve seat 130.

[0044] The fluid in the embodiments of the present disclosure is, for example, a liquid, for example, an oil liquid; or the fluid can also be a gas.

[0045] In the electromagnetic valve 400 provided by the embodiments of the present disclosure, the first channel 134 has a liquid inlet 134b, and the opening is an opening of the first channel 134 close to the one-way push piece 101. By arranging the one-way push piece 101, the fluid flowing into the first channel 134 through the liquid inlet 134b of the first channel 134 can generate a pushing force along the first direction X and in the direction away from the overflow valve seat 130 on the one-way push piece 101, and the one-way push piece 101 is driven to move along the first direction X in the direction away from the overflow valve seat 130 by using the pushing force, so as to drive the overflow valve body 120 connected with the one-way push piece 101 to move along the first direction X in the direction away from the overflow valve seat 130, so that the overflow valve body 120 is separated from the overflow valve seat 130, and a gap is formed between the overflow valve body 120 and the overflow valve seat 130, i.e., the first overflow valve port 140 is formed. For example, the overflow valve seat 130 comprises a second channel 132 located on the inner side of the first channel 134 away from the housing; the fluid flowing into the first channel 134 through the liquid inlet 134b of the first channel 134 can enter the second channel 132 through the first overflow valve port 140. Compared with the electromagnetic valve without the one-way push piece 101, in addition to the original fluid path (fluid 2, which will be introduced below), a new fluid path (fluid 1) is formed, so that the fluid can be damped through the fluid 1, and the adjustment ability of the electromagnetic valve to the fluid is increased. Figure 1 The fluid 1 shown flows into the electromagnetic valve 400 through the first channel 134, enters the second channel 132 through the first overflow valve port 140, and flows out from the second channel 132, so that the fluid can also be damped through the fluid 1, and the adjustment ability of the electromagnetic valve to the fluid is increased.

[0046] In the reverse working process, fluid 1 is generated, the part of the above-mentioned first channel 134 in the overflow valve seat 130 acts as the liquid inlet, and the second channel 132 acts as the liquid outlet.

[0047] The above-mentioned fluid 1 can generate a pushing force in the first direction X on the one-way push piece 101 to overcome the spring force and electromagnetic force (to be introduced later) on both sides of the right armature, and push the overflow valve body 120 to move to the right, thereby forming the first overflow valve port 140. Due to the damping effect of the first overflow valve port 140 on the fluid, the high-pressure fluid flowing into the first channel 134 from the liquid inlet 134b of the first channel 134 flows out in the form of low-pressure fluid through the second channel 132 after passing through the first overflow valve port 140. When the electromagnetic valve 400 works in reverse, this path is called the regulation of fluid in the reverse working process. Thus, a one-way valve is formed at the first overflow valve port 140, which can not only be opened under the regulation of the pilot valve 220 (to be introduced later), but also be opened by the one-way push piece 101 driving the overflow valve body 120 to move under the pushing force of the fluid during the reverse working process of the electromagnetic valve 400, thereby independently controlling the opening of the one-way valve, which can be used for the one-way valve in the reset process of the shock absorber. The forward working process of the electromagnetic valve 400 will be introduced later.

[0048] For example, the overflow valve body 120 includes an annular valve body part 1251 surrounding the first direction X, the annular valve body part 1251 having a first end close to the overflow valve seat 130 in the first direction X; the one-way push piece 101 is connected to the first end of the annular valve body part 1251 and protrudes from the annular valve body part 1251 in the second direction Y intersecting the first direction X, so that the end of the one-way push piece 101 closer to the overflow valve seat 130 is in contact with the overflow valve body 120; since the part of the first channel 134 close to the liquid inlet 134b of the overflow valve seat 130 is formed in the overflow valve seat 130, arranging the one-way push piece 101 at the first end of the annular valve body part 1251 can make the one-way push piece 101 closer to the liquid inlet 134b of the first channel 134, thereby facilitating the fluid entering the first channel 134 through the liquid inlet 134b to exert a greater impact force, i.e. a pushing force, on the one-way push piece 101, and increasing the reliability of the one-way push piece 101 driving the overflow valve body 120 to move in the first direction X away from the overflow valve seat 130 to form the first overflow valve port 140.

[0049] For example, the second direction Y is perpendicular to the first direction X. Of course, it is not limited to that the second direction Y is absolutely perpendicular to the first direction X, for example, it can be substantially perpendicular.

[0050] Figure 3 is a schematic view of the appearance of the one-way push piece and the overflow valve body of the electromagnetic valve provided by an embodiment of the present disclosure. Referring to Figures 2-3For example, the one-way push piece 101 and the annular valve body part 1251 are formed in a continuous one-piece structure, so as to facilitate the manufacturing of the one-way push piece 101 and the annular valve body part 1251, simplify the manufacturing process of the one-way push piece 101 and the annular valve body part 1251, and reduce the manufacturing cost. The two structures being formed in a continuous one-piece structure means that the two structures are made of the same material and have no gap between each other, and are formed by a one-piece forming process.

[0051] Of course, in other embodiments, the one-way push piece 101 and the annular valve body part 1251 can not be formed in a continuous one-piece structure, and the two structures can be connected by welding or other fixed connection.

[0052] For example, the one-way push piece 101 and the annular valve body part 1251 can be made of metal materials such as steel, iron, alloy, etc., and the material of each component of the electromagnetic valve is not limited in the embodiments of the present disclosure.

[0053] Figure 4 FIG. 1 is a structural schematic diagram of a one-way push piece of an electromagnetic valve provided by an embodiment of the present disclosure. Referring to FIG. 1, Figure 4 For example, the one-way push piece 101 is a closed ring structure around the first direction X, so as to facilitate the processing. For example, the one-way push piece 101 includes a ring-shaped main body 101a and an auxiliary connecting part 101b connected to the main body 101a. The ring-shaped main body 101a has an outer ring edge and an inner ring edge, and the part between the outer ring edge and the inner ring edge includes a stress surface 101s facing the opening 134a. The auxiliary connecting part 101b is connected to the inner ring edge of the ring-shaped main body 101a, and the radial dimension of the auxiliary connecting part 101b is smaller than the radial dimension of the outer ring edge of the main body 101a, for example, can be substantially equal to the radial dimension of the inner ring edge. The main body 101a is connected to the overflow valve body 120 through the auxiliary connecting part 101b. For example, the annular auxiliary connecting part 101b is connected to the annular valve body part 1251, so as to facilitate the connection to form a combined structure with stable structure.

[0054] Alternatively, in other embodiments, the one-way push piece 101 can be an unclosed arc structure around the first direction X. As long as the arc part of the one-way push piece 101 can face the opening 134a of the first channel 134 to bear the impact force of the fluid entering the first channel 134.

[0055] For example, as shown in FIG. 1, Figures 1-2As shown, the first channel 134 includes the first sub-cavity 13a and the second sub-cavity 13b which are in communication with each other, the first sub-cavity 13a has a first radial dimension d1, and the second sub-cavity 13b has a second radial dimension d2 which is greater than the first radial dimension d1. For example, in the first direction X, the first sub-cavity 13a is located on one side of the second sub-cavity 13b close to the liquid inlet 134b of the first channel 134. The opening 134a is the opening of the first sub-cavity 13a which is connected to the second sub-cavity 13b, the fluid enters the second sub-cavity 13b through the first sub-cavity 13a and the opening 134a, and the stress surface 101s of the one-way push piece 101 is located in the second sub-cavity 13b and faces the opening 134a. In this way, on the one hand, the stress surface 101s of the one-way push piece 101 is located in the second sub-cavity 13b with a larger radial dimension, which is beneficial to provide sufficient installation space for the one-way push piece 101; on the other hand, the opening 134a which the stress surface 101s of the one-way push piece 101 faces is the opening of the first sub-cavity 13a which is connected to the second sub-cavity 13b, therefore, the radial dimension of the opening 134a is smaller, at least smaller than the second radial dimension d2, and the stress surface 101s of the one-way push piece 101 faces the part of the first sub-cavity 13a with a smaller radial dimension, which is beneficial to increase the impact force of the fluid from the opening 134a on the stress surface 101s of the one-way push piece 101, so as to improve the reliability of the one-way push piece 101.

[0056] For example, as shown in FIG. 1, Figures 1-2 the stress surface 101s of the one-way push piece 101 is substantially perpendicular to the first direction X, so as to further increase the impact force of the fluid from the opening 134a on the stress surface 101s of the one-way push piece 101, so as to improve the reliability of the one-way push piece 101.

[0057] For example, as shown in FIG. 1, Figures 1-2 the stress surface 101s of the one-way push piece 101 overlaps with a part of the opening 134a of the first channel 134 in the first direction X. In this way, it is beneficial to ensure the fluid channel and for the one-way push piece 101 to bear the thrust force of the fluid. Alternatively, the stress surface 101s of the one-way push piece 101 can overlap with the entire opening 134a of the first channel 134 in the first direction X.

[0058] For example, in other embodiments, the stress surface 101s of the one-way push piece 101 does not overlap with the opening 134a of the first channel 134 in the first direction X. In this case, the stress surface 101s of the one-way push piece 101 can bear a certain thrust force, and in the case that the stress surface 101s of the one-way push piece 101 at least partially overlaps with the opening 134a of the first channel 134 in the first direction X, the one-way push piece 101 is better pushed by the fluid.

[0059] For example, the first passage 134 includes a first cavity located on a first side of the one-way push piece 101 close to the overflow valve seat 130 in the first direction X and a second cavity located on a second side of the one-way push piece 101 away from the overflow valve seat 130, the one-way push piece 101 has a gap S between an inner wall of the first passage 134 opposite to the overflow valve body 120, and the first cavity and the second cavity are communicated through the gap S. The gap S is used to allow the fluid to flow from the second cavity to the first cavity through the gap S to form another pair of paths for the fluid to enter the electromagnetic valve 400 to apply and adjust the damping.

[0060] For example, the overflow valve seat 130 further includes a third passage 136 and a partition 133 located between the second passage 132 and the third passage 136; the second passage 132 is located on the inner side of the annular valve body part 1251 away from the housing 110; the third passage 136 constitutes a part of the first passage 134 and includes the first sub-cavity 13a and the second sub-cavity 13b. For example, the first overflow valve port 140 is formed between the overflow valve body 120 and the partition 133 of the overflow valve seat 130.

[0061] For example, referring to Figures 1-2 , the overflow valve seat 130 further includes an outer ring part 135 located on a side of the third passage 136 away from the partition 133 and fixed with the first housing 110, and the outer ring part 135 and the partition 133 define the third passage 136. That is, the third passage 136 is a part of the first passage 134 in the overflow valve seat 130 and is defined by the partition 133 and the outer ring part 135 of the overflow valve seat 130.

[0062] For example, referring to Figure 1 , the electromagnetic valve 400 further includes a pilot valve part 200 including a second housing 210 and a pilot valve 220 located in the second housing 210; the pilot valve part 200 is arranged on a side of the main overflow valve part 100 away from the overflow valve seat 130 in the first direction X, and the main overflow valve part 100 further includes a fourth passage 430, i.e. an oil return passage, located between the first housing 110 and the overflow valve body 120, the fourth passage 430 is located on a side of the first passage 134 close to the pilot valve part 200 in the first direction X and is communicated with the first passage 134. The overflow valve body 120 includes a pilot valve port 122 and a first valve body part 124 surrounding the pilot valve port 122, and the pilot valve 220 is arranged in cooperation with the pilot valve port 122, for example, the pilot valve 220 is pressed on the pilot valve port 122 so as to block the pilot valve port 122, and when the pressure of the pilot valve port 122 reaches a certain degree, the fluid can overcome the pressure of the pilot valve 220 and flow out.

[0063] The pilot valve section 200 also includes a floating ring 240 and a pressure relief structure 290. The floating ring 240 is configured to form a pilot valve cavity 440 with the relief valve body 120. The floating ring 240 is configured to be movable in a first direction X such that the pilot valve cavity 440 is connected to a fourth channel 430 via the pressure relief structure 290. When the solenoid valve fails, the floating ring 240 is located at the position closest to the relief valve body 120. When the floating ring 240 is located at the position closest to the relief valve body 120, the pilot valve cavity 440 is connected to the return oil channel 430 via the pressure relief structure 290. When the floating ring is positioned closest to the overflow valve body, the pilot valve chamber is connected to the return oil passage via a pressure relief structure. Therefore, the working fluid can enter the return oil passage through the pressure relief structure. Because the floating ring is closest to the overflow valve body, the working fluid can only enter the return oil passage through the pressure relief structure with its smaller cross-sectional area, and cannot enter through the gap between the floating ring and the overflow valve body. This damping of the working fluid's entry into the return oil passage is achieved. At this time, the pressure difference between the inlet and outlet of the solenoid valve at a given flow rate is independent of the current. Thus, this solenoid valve can efficiently achieve safety in case of failure. When this solenoid valve is used in automotive shock absorbers, it ensures safety in the event of power failure or actuator failure, thereby guaranteeing basic driving and handling safety.

[0064] Furthermore, the solenoid valve has a relatively simple structure, which reduces costs and improves reliability. It should be noted that the slit between the floating ring and the overflow valve body caused by poor machining accuracy and errors is not considered part of the aforementioned pressure relief structure.

[0065] For example, such as Figure 1 As shown, the pilot valve section 200 also includes a flow pad 230, which is located on the side of the first valve body section 124 of the overflow valve body 120 near the pilot valve 200, that is, between the first valve body section 124 of the overflow valve body 120 and the floating ring 240. The floating ring 240 is configured to press the flow pad 230 against the first valve body section 124. The aforementioned pressure relief structure 290 includes a pressure relief opening 232 on the flow pad 230. Since the flow pad includes a pressure relief opening, the working fluid of the solenoid valve can enter the return oil passage from the pressure relief opening of the flow pad. At the same time, since the floating ring presses the flow pad against the first valve body section, it can dampen the entry of the working fluid into the return oil passage. At this time, the pressure difference between the inlet and outlet of the solenoid valve at a given flow rate is independent of the current. Thus, the solenoid valve can efficiently achieve safety in case of failure.

[0066] For example, such as Figure 1As shown, the overflow valve body 120 further comprises a second valve body part 125. The second valve body part 125 is fixedly connected with the first valve body part 124, and comprises a plate-shaped valve body part 1252 and the above-mentioned annular valve body part 1251. The plate-shaped valve body part 1252 is arranged in opposite spaced relation with the first valve body part 124, and the annular valve body part 1251 is located at the edge of the plate-shaped valve body part 1252, and the second end of the annular valve body part 1251 away from the overflow valve seat 130 in the first direction X is connected with the plate-shaped valve body part 1252; the one-way push piece 101 is driven to move in the first direction X to drive the overflow valve body 120 to move in the first direction X under the action of the pushing force applied by the fluid from the opening 134a, so as to form the above-mentioned first overflow valve port 140 between the annular valve body part 1251 and the partition part 133.

[0067] For example, in some examples, as Figure 1 shown, the first valve body part 124 and the second valve body part 125 are independent components, and then are combined into one whole body in a press-fitting (or welding) manner. When the first valve body part 124 and the second valve body part 125 are combined into one whole body in a press-fitting manner, a sealing ring 127 can also be arranged at the combined position of the first valve body part 124 and the second valve body part 125 to improve the sealing performance.

[0068] For example, as Figure 1 shown, the pilot valve part 200 further comprises a pre-tightening spring 250, which is arranged in contact with the floating ring 240 and is configured to apply a force to the floating ring 240 towards the first valve body part 124; the pushing force applied by the fluid from the opening 134a to the one-way push piece 101 is greater than the resultant force (for example, the resultant force in the first direction X) of the force applied by the pre-tightening spring 250 and the electromagnetic force, so that the pushing force overcomes the resultant force of the force applied by the pre-tightening spring 250 and the electromagnetic force to drive the one-way push piece 101 to move in the first direction X towards the direction away from the overflow valve seat 130, i.e. to move to the right in the first direction X in Figure 1 , thereby driving the overflow valve body 120 to move to form the first overflow valve port 140 between the overflow valve body 120 and the overflow valve seat 130.

[0069] For example, as Figure 1As shown, the electromagnetic valve 400 further comprises an electromagnetic driving part 300, which is located at the side of the pilot valve part 200 away from the main relief valve part 100. The electromagnetic driving part 300 comprises an armature support 320, which is configured to apply a force to the floating ring 240 away from the first valve body part 124 to move the floating ring 240 in a direction away from the first valve body part 124, i.e. in a direction away from the relief pad 230, when magnetized. Thus, when the electromagnetic driving part is not failed, the armature support 320 is magnetized and applies a force to the floating ring 240 away from the first valve body part 124, which can overcome the elastic force of the pre-tightening spring 250, so that the floating ring 240 moves in a direction away from the first valve body part 124, i.e. in a direction away from the relief pad 230, so that the floating ring 240 is no longer pressed against the relief pad 230. At this time, the pressure difference between the inlet and the outlet of the electromagnetic valve 400 is related to the driving current, so that the damping of the electromagnetic valve can be controlled by controlling the driving current.

[0070] For example, in the forward working process, the second channel 132 is the inlet and the third channel 136 is the outlet. For example, the relief valve body 120 is further configured to be movable in the first direction X under the action of the force away from the first valve body part 124 applied by the armature support 320, the pressure in the pilot valve cavity 440, and the pressure in the space between the first valve body part 124 and the second valve body part 125, to form a second relief valve port 141 between the annular valve body part 1251 and the relief valve seat 130, e.g. between the annular valve body part 1251 and the separation part 133 of the relief valve seat 130. Thus, in the forward working process, the first relief valve port 140 is closed and the second relief valve port 141 is open. Figure 1 As shown, the fluid 2 enters the electromagnetic valve 400 via the second channel 132, enters the third channel 136 via the second relief valve port 141, and flows out from the third channel 136. At this time, the pressure of the pilot valve 220 on the pilot valve port 122 can be adjusted by controlling the driving current of the electromagnetic driving part, so as to adjust the opening degree of the relief valve port 140 and adjust the damping of the electromagnetic valve 400 on the fluid entering the electromagnetic valve 400.

[0071] In addition, the electromagnetic valve 400 can also generate Figure 1The fluid path shown by fluid 3 is to adjust the damping to the fluid entering the electromagnetic valve 400 through the path. For example, the fluid path shown by fluid 3 is generated during the forward working process. The path of fluid 3 is as follows: the fluid entering through the second channel 132 enters the space between the first valve body 124 and the second valve body 125 through the opening 1253 on the plate-shaped valve body 1252, then enters the pilot valve cavity 440 through the channel directly formed by the pilot valve 220 and the first valve body 124, and then enters the fourth channel 430 through the pressure relief structure 290. The fluid can enter the first channel 134 in communication with the fourth channel 430, enter the first cavity of the one-way push piece 101 from the second cavity of the one-way push piece 101 away from the second side of the relief valve seat 130 through the gap S, and finally flow out of the electromagnetic valve 400 from the third channel 136.

[0072] The first relief valve port 140 and the second relief valve port 141 are both formed between the annular valve body 1251 and the partition 133. The second relief valve port 141 is generated during the forward working process due to the movement of the relief valve body 120 in the first direction X under the action of the force applied by the armature support 320 away from the first valve body 124, the pressure in the pilot valve cavity 440, and the pressure between the first valve body 124 and the second valve body 125, and the flow direction of the fluid 2 is unidirectional, thereby forming a unidirectional valve for the forward working process; the first relief valve port 140 is generated during the reverse working process due to the movement of the relief valve body 120 to the right by overcoming the spring force on both sides of the right armature and the electromagnetic force by the thrust of the fluid entering the electromagnetic valve 400 from the first channel 134 to the one-way push piece 101 in the first direction X, and the flow direction of the fluid 1 is unidirectional and different from that of the fluid 2, thereby forming a unidirectional valve for the reverse working process. Thus, the unidirectional valve formed by the relief valve body 120 and the relief valve seat 130 not only can open to form the second relief valve port 141 under the adjustment of the pilot valve 220 during the forward working process, but also can drive 120 to move under the action of the thrust of the fluid entering through the part of the first channel 134 in the relief valve seat 130 (i.e., the third channel 136) by the one-way push piece 101, thereby forming the first relief valve port 140 during the reverse working process, thereby enabling independent control of the opening of the unidirectional valve during the reverse working process, independent of opening by electromagnetic force, thereby expanding the function of the electromagnetic valve 400.

[0073] In the present disclosure, the forward working process is, for example, the compression process of the shock absorber using the electromagnetic valve provided by the embodiments of the present disclosure, and the reverse working process is, for example, the recovery process of the shock absorber using the electromagnetic valve provided by the embodiments of the present disclosure. Thus, the electromagnetic valve can not only be used as a compression valve for the compression process of the shock absorber, and the damping of the fluid 2 entering the electromagnetic valve is adjusted by the check valve in the forward working process, but also be used as a recovery valve for the recovery process of the shock absorber, and the damping of the fluid 1 entering the electromagnetic valve is adjusted by the check valve in the reverse working process.

[0074] For example, referring to Figure 1 , the main overflow valve part 100 further comprises a stop spring 150, which is arranged between the first housing 110 and the first valve body part 124, and is located on the side of the one-way push piece 101 away from the overflow valve seat 130 in the first direction X, so as to avoid the stop spring 150 affecting the force of the one-way push piece 101.

[0075] In some examples, as shown in Figure 1 , the electromagnetic driving part 300 further comprises a third housing 310, an armature shaft 330 and an armature 340; the armature shaft 330 is located in the third housing 310; the armature 340 is located in the third housing 310 and is located on the side of the armature support 320 away from the pilot valve 220, the armature support 320 comprises a first intermediate through hole 320H, the armature 340 comprises a second intermediate through hole 340H, the armature shaft 330 passes through the first intermediate through hole 320H and the second intermediate through hole 340H, and one end of the armature shaft 330 is connected with the pilot valve 220.

[0076] In some examples, as shown in Figure 1 , the electromagnetic driving part 300 further comprises an end cap part 350 and an upper cavity 360, the end cap part 350 is located on the side of the armature 340 away from the armature support 320, and the upper cavity 360 is located between the armature support 320 and the end cap part 350; the armature shaft 330 comprises a first communication groove 335 configured to communicate the pilot valve cavity 440 and the upper cavity 360. Thus, the working fluid in the pilot valve cavity 440 can flow into the upper cavity 360, and the working fluid in the upper cavity 360 can flow into the pilot valve cavity 440, thereby providing a hydraulic circuit so that the pressures of the two cavities can be balanced, thereby improving the stability of the electromagnetic valve.

[0077] In some examples, as shown in Figure 1 , the armature 340 further comprises a second communication groove 345 configured to communicate the two sides of the armature 340 in the first direction, so that the pressures of the two sides of the armature 340 are balanced.

[0078] In some examples, as shown in Figure 1As shown, the electromagnetic driving part 300 further comprises a magnetic isolation ring 370 and an electromagnet 380; the magnetic isolation ring 370 is sleeved on the armature 340, and the electromagnet 380 is located between the magnetic isolation ring 370 and the third shell 310.

[0079] The at least one embodiment of the present disclosure further provides a shock absorber, which can drive the one-way push piece to move in the first direction by the pushing force exerted by the fluid entering the electromagnetic valve on the one-way push piece, and drive the overflow valve body connected with the one-way push piece to move in the first direction to form a first overflow valve port between the overflow valve body and the overflow valve seat, thereby forming another channel for exerting damping on the fluid, so that the formation of the first overflow valve port can be controlled without relying on the electromagnetic force.

[0080] Exemplarily, Figure 6 is a schematic diagram of the appearance structure of the shock absorber provided by an embodiment of the present disclosure; Figure 7 is a schematic diagram of the fluid flow direction in the recovery process when the electromagnetic valve is used as the recovery valve of the shock absorber according to an embodiment of the present disclosure; Figure 8 is Figure 7 includes a partial enlarged schematic diagram of the electromagnetic valve provided by an embodiment of the present disclosure.

[0081] For example, referring to Figures 6-7 , the shock absorber 500 comprises a first cylinder 11, a second cylinder 12 and a third cylinder 13. The inside of the first cylinder 11 is provided with a piston assembly; the second cylinder 12 is arranged outside the first cylinder 11, and a first fluid channel L1 is formed between the first cylinder 11 and the second cylinder 12; the third cylinder 13 is arranged outside the second cylinder 12, and a second fluid channel L2 is formed between the second cylinder 12 and the third cylinder 13.

[0082] For example, the shock absorber 500 can comprise a compression valve F1 and a recovery valve F2, the compression valve F1 is used to adjust the damping on the fluid when the shock absorber 500 performs the compression process, and the recovery valve F2 is used to adjust the damping on the fluid when the shock absorber 500 performs the recovery process.

[0083] For example, in some embodiments, the recovery valve of the shock absorber 500 can be the electromagnetic valve provided by an embodiment of the present disclosure, that is, the electromagnetic valve provided by an embodiment of the present disclosure is used as the recovery valve F2 of the shock absorber 500. In this case, the path shown by the fluid 1 in Figure 1 is executed in the recovery process. Referring to Figures 7-8, the damper 500 performs the recovery process, the fluid enters the first liquid inlet of the recovery valve, i.e. the third passage 136, from the second fluid passage L2, the one-way push piece 101 moves in the first direction X under the action of the pushing force applied by the fluid entering the first liquid inlet of the recovery valve to drive the overflow valve body 120 to move in the first direction X, forming the first overflow valve port 140, the fluid enters the first liquid outlet of the recovery valve, i.e. the second passage 132, through the first overflow valve port 140, and then flows out of the recovery valve from the first liquid outlet of the recovery valve to the first fluid passage L1.

[0084] Figure 9 is a schematic diagram of the fluid flow during the compression process when the electromagnetic valve provided by an embodiment of the present disclosure is used as the compression valve of the damper. Figure 10 is Figure 9 includes a partial enlarged schematic diagram of the electromagnetic valve provided by an embodiment of the present disclosure.

[0085] For example, in some embodiments, the compression valve F1 of the damper 500 can also be the electromagnetic valve provided by an embodiment of the present disclosure, that is, the electromagnetic valve provided by an embodiment of the present disclosure is used as both the recovery valve F2 and the compression valve F1 of the damper 500. In this case, during the compression process of the damper 500, the damper 500 performs the paths of the fluid 1, the fluid 2 and the fluid 3 shown in Figure 1 Figures 9-10 , the damper 500 performs the compression process, the fluid enters the second liquid inlet of the compression valve F1, i.e. the second passage 132, from the first fluid passage L1, part of the fluid entering the second liquid inlet of the compression valve F1 finally flows out of the second liquid outlet of the compression valve F1 to the second fluid passage L2 after flowing through the first path (i.e. the path of the fluid 2 shown in Figure 1 Figure 1 , part of the fluid entering the second liquid inlet of the compression valve F1 finally flows out of the second liquid outlet of the compression valve F1 to the second fluid passage L2 after flowing through the second path (i.e. the path of the fluid 3 shown in Figure 1

[0086] The following points need to be explained:

[0087] ​​​(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.

[0088] (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.

[0089] (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.

[0090] 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 main spill valve portion comprising a first housing, a spill valve seat, a spill valve body, a first passage, and a one-way push piece, wherein the spill valve seat is at least partially located in the first housing, the spill valve body is located in the first housing and is located on one side of the spill valve seat in a first direction; the first passage is at least partially located on an outer side of the spill valve body close to the first housing, the one-way push piece is located in the first passage and is connected with the spill valve body, comprises a force receiving surface facing an opening of the first passage, and is configured to move in the first direction under the action of a pushing force applied by a fluid from the opening to drive the spill valve body to move in the first direction to form a first spill valve port between the spill valve body and the spill valve seat; the electromagnetic valve further comprises a pilot valve portion, the pilot valve portion comprises a second housing and a pilot valve located in the second housing; the pilot valve portion is arranged on a side of the main spill valve portion away from the spill valve seat in the first direction; the spill valve body comprises a pilot valve port, a first valve body portion, and a second valve body portion; the first valve body portion surrounds the pilot valve port, the pilot valve is arranged in cooperation with the pilot valve port, the pilot valve portion further comprises a floating ring configured to form a pilot valve cavity with the spill valve body; there is a space between the first valve body portion and the second valve body portion; the electromagnetic valve further comprises: an electromagnetic drive portion located on a side of the pilot valve portion away from the main spill valve portion, wherein the electromagnetic drive portion comprises an armature support configured to apply a force away from the first valve body portion to the floating ring when magnetized to move the floating ring in a direction away from the main spill valve portion; the spill valve body is further configured to be movable in the first direction under the action of the force away from the first valve body portion applied by the electromagnetic drive portion to the floating ring through the armature support, the pressure in the pilot valve cavity, and the pressure in the space between the first valve body portion and the second valve body portion, to form a second spill valve port between the spill valve body and the spill valve seat.

2. The electromagnetic valve according to claim 1, wherein the spill valve body comprises an annular valve body portion surrounding the first direction, the annular valve body portion has a first end close to the spill valve seat in the first direction; the one-way push piece is connected with the first end of the annular valve body portion and protrudes from the annular valve body portion in a second direction intersecting the first direction.

3. The electromagnetic valve according to claim 2, wherein the one-way push piece and the annular valve body portion form a continuous one-piece structure.

4. The electromagnetic valve according to claim 2, wherein the first passage comprises a first sub-cavity and a second sub-cavity communicating with each other, the first sub-cavity has a first radial dimension, the second sub-cavity has a second radial dimension greater than the first radial dimension; the opening is an opening of the first sub-cavity communicating with the second sub-cavity, the fluid enters the second sub-cavity through the first sub-cavity and the opening, and the force receiving surface of the one-way push piece is located in the second sub-cavity and faces the opening.

5. The electromagnetic valve according to claim 4, wherein the force receiving surface is substantially perpendicular to the first direction.

6. The electromagnetic valve according to any one of claims 1-5, wherein, the force receiving surface of the one-way push piece overlaps with a portion of the opening of the first passage in the first direction; or, the force receiving surface of the one-way push piece overlaps with the entire opening of the first passage in the first direction; or, the force receiving surface of the one-way push piece does not overlap with the opening of the first passage in the first direction.

7. The electromagnetic valve according to any one of claims 1 to 5, wherein the one-way push piece is a closed ring structure around the first direction; or, the one-way push piece is an open arc structure around the first direction.

8. The electromagnetic valve according to any one of claims 1 to 5, wherein the first passage includes a first cavity on a first side of the one-way push piece and a second cavity on a second side of the one-way push piece in the first direction, the one-way push piece having a gap between an inner wall of the first passage opposite the spool valve body, the first cavity and the second cavity being in communication through the gap.

9. The electromagnetic valve according to claim 4 or 5, wherein the spool valve seat includes a second passage, a third passage, and a partition between the second passage and the third passage; the second passage is on an inner side of the annular valve body portion away from the housing; the third passage constitutes a portion of the first passage and includes the first sub-cavity and the second sub-cavity.

10. The electromagnetic valve according to claim 9, wherein the spool valve seat further includes an outer ring portion on a side of the third passage away from the partition and fixed with the first housing, the outer ring portion and the partition defining the third passage.

11. The electromagnetic valve according to claim 9, wherein the main spool valve portion further includes a fourth passage between the first housing and the spool valve body, the fourth passage being on a side of the first passage close to the pilot valve portion in the first direction and in communication with the first passage; the pilot valve portion further includes a pressure relief structure, the floating ring being configured to be movable in the first direction to cause the pilot valve cavity to be in communication with the fourth passage through the pressure relief structure.

12. The electromagnetic valve according to claim 11, wherein the second valve body portion is fixedly connected with the first valve body portion and includes a plate-shaped valve body portion and the annular valve body portion; the plate-shaped valve body portion is spaced apart from the first valve body portion opposite, and the annular valve body portion is located at the edge of the plate-shaped valve body portion, and a second end of the annular valve body portion away from the spool valve seat in the first direction is connected with the plate-shaped valve body portion; the one-way push piece is driven to move in the first direction by the force of the fluid from the opening to drive the spool valve body to move in the first direction, so that the first spool valve port is formed between the annular valve body portion and the partition.

13. The electromagnetic valve according to claim 11, wherein the pilot valve portion further includes a pre-tightening spring in contact with the floating ring and configured to apply a force to the floating ring towards the first valve body portion; the one-way push piece is subjected to a force greater than the combined force of the force applied by the pre-tightening spring and the electromagnetic force.

14. The electromagnetic valve according to claim 11, wherein the spool valve body is moved in the first direction to form the second spool valve port between the annular valve body portion and the partition.

15. The solenoid valve according to claim 14, wherein The armature support is configured to be magnetized such that the float ring is located closest to the spool when the pilot valve cavity is in communication with the fourth passage through the pressure relief structure.

16. The solenoid valve according to claim 11, wherein The pilot valve further comprises a flow pad located between the first valve body portion and the float ring of the spool, the float ring being configured to compress the flow pad against the first valve body portion, the pressure relief structure comprising a pressure relief opening on the flow pad.

17. The electromagnetic valve according to claims 1-5, wherein, The main spool further comprises: a stop spring disposed between the first housing and the first valve body portion on a side of the one-way push piece distal to the spool in the first direction.

18. A shock absorber comprising the solenoid valve of any one of claims 1-17.

19. The damper of claim 18, comprising a first cylinder, a second cylinder, and a third cylinder, wherein, The first cylinder is internally provided with a piston assembly; the second cylinder is disposed outside the first cylinder to form a first fluid passage with the first cylinder; the third cylinder is disposed outside the second cylinder to form a second fluid passage with the second cylinder; The recovery valve of the shock absorber is the solenoid valve; The shock absorber performs a recovery process, fluid enters a first inlet of the recovery valve from the second fluid passage, the one-way push piece moves in the first direction under the action of the thrust force exerted by the fluid entering the first inlet of the recovery valve to drive the spool to move in the first direction, forming the first spool port, the fluid enters a first outlet of the recovery valve through the first spool port, and then flows out of the recovery valve from the first outlet to the first fluid passage.

20. The damper of claim 19, wherein, The compression valve of the shock absorber is the solenoid valve; The shock absorber performs a compression process, fluid enters a second inlet of the compression valve from the first fluid passage, a part of the fluid entering the second inlet of the compression valve flows through a first path in the compression valve and finally flows out of a second outlet of the compression valve to the second fluid passage, another part of the fluid entering the second inlet of the compression valve flows through a second path in the compression valve and finally flows out of the second outlet of the compression valve to the second fluid passage; and Fluid enters a first inlet of the recovery valve from the second fluid passage, the one-way push piece moves in the first direction under the action of the thrust force exerted by the fluid entering the first inlet of the recovery valve to drive the spool to move in the first direction, forming the first spool port, the fluid enters a first outlet of the recovery valve through the first spool port, and then flows out of the recovery valve from the first outlet to the first fluid passage.

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