Solenoid valve and damper

Abstract

An electromagnetic valve and a shock absorber, the electromagnetic valve comprising a main overflow valve part, the main overflow valve part comprising an overflow valve seat, an overflow valve body, a one-way push piece and an elastic member. The overflow valve body is located at one side of the overflow valve seat in a first direction; the overflow valve seat comprises a first valve seat, a second valve seat and a first cavity, the first valve seat is located at a side of the second valve seat away from the overflow valve body in the first direction, and is connected with the second valve seat, the first valve seat and the second valve seat surround the first cavity; the first valve seat comprises a first opening and a second opening; the first opening communicates with the first cavity; the one-way push piece is located in the first cavity and covers the second opening, the one-way push piece is configured to seal the second opening under the pre-tightening force of the elastic member, and is configured to open the second opening under the pressure of the fluid from the second opening.

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 vibration, a shock absorber is usually installed in the suspension system to suppress the oscillation of the spring when rebounding after absorbing the shock, so as 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, and a single damping value shock absorber cannot meet people's needs, so a 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 main overflow valve part, the main overflow valve part comprising an overflow valve seat, an overflow valve body, a one-way push piece and an elastic member. The overflow valve body is located on one side of the overflow valve seat in a first direction; the overflow valve seat comprises a first valve seat, a second valve seat and a first cavity, the first valve seat is located on the side of the second valve seat away from the overflow valve body in the first direction, and is connected with the second valve seat, and the first valve seat and the second valve seat surround the first cavity; the first valve seat comprises a first opening and a second opening; the first opening communicates with the first cavity; the one-way push piece is located in the first cavity and covers the second opening, the one-way push piece is configured to seal the second opening under the pre-tightening force of the elastic member, and is configured to open the second opening under the pressure of the fluid from the second opening.

[0005] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the second valve seat comprises a third opening, the first opening communicates with the third opening; in the forward process, the one-way push piece is configured to seal the second opening under the pre-tightening force of the elastic member, and the fluid enters the third opening via the first opening; in the reverse process, the one-way push piece is configured to open the second opening under the pressure of the fluid from the second opening, the fluid enters the first cavity via the second opening, and is discharged from the first cavity via the first opening.

[0006] For example, the electromagnetic valve provided by an embodiment of the present disclosure further comprises a pilot valve part and an electromagnetic driving part, the electromagnetic driving part is located on the side of the pilot valve part away from the main spill valve part; the spill valve body is configured to be movable in the first direction under the action of the force applied by the pilot valve part and the electromagnetic driving part, so that the first spill valve port is formed between the spill valve body and the spill valve seat.

[0007] For example, the electromagnetic valve provided by an embodiment of the present disclosure further comprises a pilot valve part and an electromagnetic driving part, the electromagnetic driving part is located on the side of the pilot valve part away from the main spill valve part; the spill valve body is configured to be movable in the first direction under the action of the force applied by the pilot valve part and the electromagnetic driving part, so that the first spill valve port is formed between the spill valve body and the spill valve seat.

[0008] For example, the electromagnetic valve provided by an embodiment of the present disclosure further comprises a pilot valve part and an electromagnetic driving part, the electromagnetic driving part is located on the side of the pilot valve part away from the main spill valve part; the spill valve body is configured to be movable in the first direction under the action of the force applied by the pilot valve part and the electromagnetic driving part, so that the first spill valve port is formed between the spill valve body and the spill valve seat.

[0009] For example, the electromagnetic valve provided by an embodiment of the present disclosure further comprises a pilot valve part and an electromagnetic driving part, the electromagnetic driving part is located on the side of the pilot valve part away from the main spill valve part; the spill valve body is configured to be movable in the first direction under the action of the force applied by the pilot valve part and the electromagnetic driving part, so that the first spill valve port is formed between the spill valve body and the spill valve seat.

[0010] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the one-way push piece does not extend into the intermediate passage, or the one-way push piece extends into the intermediate passage and does not completely block the intermediate passage, and a gap exists between the one-way push piece and the inner wall of the intermediate passage.

[0011] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the elastic member covers the second opening and extends beyond the range of the second opening, the first end of the elastic member is fixed on the first partition of the second valve seat, and the second end of the elastic member is fixed on the outer ring portion of the second valve seat.

[0012] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the inner surface of the side portion of the first valve seat extends in a second direction, the one-way push piece extends in the second direction, and the second direction is substantially perpendicular to the first direction; in the state that the first opening is sealed by the one-way push piece, the working surface of the one-way push piece for covering the first opening is attached to the inner surface of the side portion; and the extension direction of the intermediate passage intersects with both the second direction and the first direction.

[0013] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the main overflow valve portion further includes a first housing, at least part of the overflow valve seat and the overflow valve body are located in the first housing; the main overflow valve portion further includes a second cavity between the first housing and the overflow valve body, the second cavity can be connected to the third opening via the first overflow valve port; and the first housing has a fourth opening, the fourth opening is connected to the second cavity.

[0014] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the first housing has a plurality of fourth openings spaced apart from each other; the track in which the plurality of fourth openings are arranged is annular as a whole, and the one-way push piece is annular and covers the plurality of fourth openings.

[0015] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the one-way push piece is a closed annular or an unclosed arc shape around an axis extending in the first direction; and the elastic member is a closed annular or an unclosed annular shape around an axis extending in the first direction.

[0016] For example, the electromagnetic valve provided by an embodiment of the present disclosure includes a pilot valve part, a main spill valve part, and an electromagnetic drive part. The pilot valve part includes a second housing and a pilot valve located in the second housing. The pilot valve is arranged in cooperation with the pilot valve port. The pilot valve part further includes 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 main spill valve part further includes a third cavity between the first housing and the spill valve body. The third cavity is located on the side of the second cavity close to the pilot valve part in the first direction and is in communication with the second cavity. The floating ring is configured to be movable in the first direction so that the pilot valve cavity is in communication with the third cavity through the pressure relief structure.

[0017] For example, the electromagnetic valve provided by an embodiment of the present disclosure includes a pilot valve part, a main spill valve part, and an electromagnetic drive part. The pilot valve part includes a second housing and a pilot valve located in the second housing. The pilot valve is arranged in cooperation with the pilot valve port. The pilot valve part further includes 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 main spill valve part further includes a third cavity between the first housing and the spill valve body. The third cavity is located on the side of the second cavity close to the pilot valve part in the first direction and is in communication with the second cavity. The floating ring is configured to be movable in the first direction so that the pilot valve cavity is in communication with the third cavity through the pressure relief structure.

[0018] An embodiment of the present disclosure further provides a shock absorber including any one of the electromagnetic valves provided by an embodiment of the present disclosure.

[0019] For example, the shock absorber provided by an embodiment of the present disclosure includes the electromagnetic valve as a recovery valve of the shock absorber. The shock absorber performs a recovery process. The one-way push piece seals the second opening under the pre-tightening force of the elastic member. The spill valve body is driven to move in the first direction to form the first spill valve port. Fluid enters the electromagnetic valve from the first opening of the recovery valve and flows out of the recovery valve through the first spill valve port.

[0020] Alternatively,

[0021] The compression valve of the shock absorber is the electromagnetic valve. The shock absorber performs a compression process. The one-way push piece opens the second opening under the pressure of fluid from the second opening. Fluid enters the first cavity through the second opening and is discharged from the first cavity through the first opening. BRIEF DESCRIPTION OF DRAWINGS

[0022] 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 in the following description only relate to some embodiments of the present disclosure and are not a limitation on the present disclosure.

[0023] Figure 1A structural schematic diagram of an electromagnetic valve provided by an embodiment of the present disclosure is shown in FIG. 1.

[0024] Figure 2 Figure 1 A partial enlarged schematic diagram of the electromagnetic valve shown in FIG. 1, which includes a one-way push piece and an elastic member, is shown in FIG. 2.

[0025] Figure 3 A structural schematic diagram of an electromagnetic valve provided by an embodiment of the present disclosure is shown in FIG. 1.

[0026] Figure 4 A structural schematic diagram of a one-way push piece of an electromagnetic valve provided by an embodiment of the present disclosure is shown in FIG. 3.

[0027] Figure 5 A structural schematic diagram of an elastic member of an electromagnetic valve provided by an embodiment of the present disclosure is shown in FIG. 4.

[0028] Figure 6 A schematic diagram of a shock absorber provided by an embodiment of the present disclosure is shown in FIG. 5. DETAILED DESCRIPTION

[0029] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the scope of protection of the present disclosure.

[0030] Unless otherwise defined, the technical terms or scientific terms used herein should be understood as the common meanings thereof by those of ordinary skill in the art to which the present disclosure belongs. The terms “first”, “second” and similar terms used in the patent application specification and claims of the present disclosure do not represent any order, number or importance, but are only used to distinguish different components. The terms “include” or “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, without excluding other elements or objects. “In”, “out”, “up”, “down” and the like are only used to represent relative positional relationships, which may change accordingly when the absolute positions of the described objects change.

[0031] The drawings in the present disclosure are not strictly drawn according to the actual proportions, and the number of fourth openings in the electromagnetic valve is not limited to the number shown in the drawings. The specific sizes and numbers of various structures can be determined according to actual needs. The drawings described in the present disclosure are only structural schematic diagrams.

[0032] ​The features of "parallel", "perpendicular", and "same" used in the present disclosure include the strict sense of "parallel", "perpendicular", "same", and the case of "substantially parallel", "substantially overlapping", "substantially same" containing certain errors, which are within the acceptable deviation range for a specific value determined by a person 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 within 10% or 5% of the value if not otherwise specified.

[0033] With the development of automobile electrification 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. For this purpose, an electromagnetic valve with continuously adjustable damping can be used to achieve continuous adjustment of the damping characteristics of the shock absorber.

[0034] For the process of using an electromagnetic valve with continuously adjustable damping to achieve continuous adjustment of the damping characteristics of the shock absorber, if the effective damping of the fluid can be applied and adjusted in both the forward and reverse processes of the electromagnetic valve, or the adjustment path of the adjustable damping applied to the fluid is increased, the adjustment ability of the shock absorber using the electromagnetic valve to the damping of the fluid will be greatly improved.

[0035] 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 an overflow valve seat, an overflow valve body, a one-way push piece, and an elastic member. The overflow valve body is located on one side of the overflow valve seat in a first direction; the overflow valve seat includes a first valve seat, a second valve seat, and a first cavity, the first valve seat being located on the side of the second valve seat away from the overflow valve body in the first direction and being connected with the second valve seat, the first valve seat and the second valve seat surrounding the first cavity; the first valve seat includes a first opening and a second opening; the first opening communicates with the first cavity; the one-way push piece is located in the first cavity and covers the second opening, the one-way push piece being configured to seal the second opening under the pre-tightening force of the elastic member and being configured to open the second opening under the pressure of the fluid from the second opening.

[0036] At least one embodiment of the present disclosure also provides a shock absorber, and 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 can adjust the bidirectional working process of the fluid without increasing additional one-way valves and improves the damping adjustment ability of the fluid.

[0037] Exemplarily, Figure 1 A structural schematic diagram of an electromagnetic valve provided by an embodiment of the present disclosure is shown in the figure.Figure 2 is Figure 1 is a partial enlarged view of the electromagnetic valve shown in Figure 3 is a schematic view of the appearance structure of the electromagnetic valve provided by an embodiment of the present disclosure. Referring to Figures 1-3 , the electromagnetic valve 400 provided by the embodiment of the present disclosure includes a main overflow valve part 100, and the main overflow valve part 100 includes an overflow valve body 120, an overflow valve seat 130, a one-way push piece 1 and an elastic member 2. The overflow valve body 120 is located on one side of the overflow valve seat 130 in a first direction X; the overflow valve seat 130 includes a first valve seat 31, a second valve seat 32 and a first cavity H1, the first valve seat 31 is located on a side of the second valve seat 32 away from the overflow valve body 120 in the first direction X, and is connected with the second valve seat 32, and the first valve seat 31 and the second valve seat 32 surround the first cavity H1; the first valve seat 31 includes a first opening O1 and a second opening O2; the first opening O1 communicates with the first cavity H1; the one-way push piece 1 is located in the first cavity H1 and covers the second opening O2, the one-way push piece 1 is configured to seal the second opening O2 under the pre-tightening force of the elastic member 2, and is configured to open the second opening O2 under the pressure of the fluid from the second opening O2.

[0038] In the design scheme of the electromagnetic valve provided by the embodiment of the present disclosure, the overflow valve seat 130 is not an integral structure, but includes the first valve seat 31 and the second valve seat 32 connected with each other, and the first cavity H1 is surrounded by the first valve seat 31 and the second valve seat 32. On the one hand, the one-way push piece 1 and the elastic member 2 are arranged in the first cavity H1 to seal and open the second opening O2 in different working processes (for example, the forward working process and the reverse working process described below), so as to control the flow direction and flow path of different fluids in different working processes, and to apply damping to the fluids and adjust the damping in different working processes.

[0039] Therefore, the electromagnetic valve provided by the embodiment of the present disclosure provides a new design scheme of the structure of the electromagnetic valve. On the one hand, the flow direction and flow path of different fluids can be controlled in different working states, such as the bidirectional working state of the forward working process and the reverse working process described below, the damping is applied to the fluids and the damping is adjusted in different working processes, the processing capability of the electromagnetic valve for applying damping to the fluids is improved, and in the forward working process and the reverse working process, different adjustment paths are provided, which can expand the flexibility of the electromagnetic valve applied to the shock absorber as a one-way valve for realizing multiple functions. On the other hand, the electromagnetic valve has small structure size, simple structure, reduced parts, and is convenient for manufacturing and adjusting the parts, which is also conducive to reducing the cost.

[0040] For example, referring to Figures 1-2, the second valve seat 32 comprises a third opening O3, and the first opening O1 communicates with the third opening O3. In the forward working process, the one-way push piece 1 is configured to seal the second opening O2 under the pre-tightening force of the elastic member 2, and the fluid enters the third opening O3 through the first opening O1; at this time, the one-way push piece 1 tightly abuts on the inner wall of the first valve seat 31 where the second opening O2 is arranged, so as to seal the second opening O2 and not allow the fluid to pass through the second opening O2. In the reverse working process, the one-way push piece 1 is configured to open the second opening O2 under the pressure of the fluid from the second opening O2, and the fluid can enter the first cavity H1 through the second opening O2, and since the first cavity H1 communicates with the first opening O1, the fluid entering the first cavity H1 through the first opening O1 is discharged from the first cavity H1 through the first opening O1. The one-way push piece 1 is subjected to the applied pressure (or thrust) from the high-pressure fluid of the second opening O2, which is greater than the force applied by the elastic member 2, so that the one-way push piece 1 overcomes the force applied by the elastic member 2 to the one-way push piece 1 and moves in the first direction X away from the second opening O2, so that the elastic member 2 is elastically deformed, thereby opening the second opening O2 and allowing the fluid to pass through the second opening O2.

[0041] For example, the one-way push piece 1 is made of a rigid material, and under the applied thrust of the high-pressure fluid from the second opening O2, the one-way push piece 1 as a whole moves in the first direction X away from the second opening O2, thereby opening the second opening O2.

[0042] Alternatively, in other embodiments, the one-way push piece 1 can also be made of a material with certain elasticity or flexibility, and under the applied thrust of the high-pressure fluid from the second opening O2, a part of the one-way push piece 1 corresponding to the second opening O2 elastically deforms and moves in the first direction X away from the second opening O2, thereby opening the second opening O2.

[0043] For example, the material of the one-way push piece 1 can be a metal material, such as a metal or an alloy, for example, iron, aluminum, stainless steel, etc. Alternatively, the material of the one-way push piece 1 can also be a composite material, such as glass fiber, etc., a carbon fiber material, etc. Of course, the material of the one-way push piece 1 is not limited to the above-mentioned types, and a person skilled in the art can select as needed as long as the above-mentioned functions of the one-way push piece 1 can be achieved.

[0044] For example, with reference to Figure 1The solenoid valve 400 also includes a pilot valve section 200 and an electromagnetic drive section 300. The electromagnetic drive section 300 is located on the side of the pilot valve section 200 away from the main relief valve section 100. The relief valve body 120 is configured to move in a first direction X under the force jointly applied by the pilot valve section 200 and the electromagnetic drive section 300, so that a first relief valve port 140 is formed between the relief valve body 120 and the relief valve seat 130, and the first relief valve port 140 communicates with the third opening O3. Thus, fluid entering the third opening O3 can be discharged from the solenoid valve 400 through the first relief valve port 140. The opening degree of the first relief valve port 140 can be adjusted by continuously and adjustably controlling the force jointly applied by the pilot valve section 20 and the electromagnetic drive section 300, thereby continuously and adjustably adjusting the damping applied by the solenoid valve 400 to the fluid passing through the first relief valve port 140.

[0045] For example, a first overflow valve port 140 is formed between the second valve seat 32 of the overflow valve seat 130 and the overflow valve body 120.

[0046] For example, such as Figure 1 As shown, the overflow valve body 120 includes a pilot valve port 122, a first valve body portion 124, and a second valve body portion 125. The first valve body portion 124 surrounds the pilot valve port 122. The second valve body portion 125 is fixedly connected to the first valve body portion 124 and includes a plate-shaped valve body portion 1252 and an annular valve body portion 1251. The bottoms of the plate-shaped valve body portion 1252 and the first valve body portion 124, which extend along a second direction Y, are spaced apart from each other in a first direction X, where the second direction Y is perpendicular to the substrate in the first direction X. The annular valve body portion 1251 is located at the edge of the plate-shaped valve body portion 1252, and the second end of the annular valve body portion 1251, which is away from the overflow valve seat 130 in the first direction X, is connected to the plate-shaped valve body portion 1252. The overflow valve body 120 moves in the first direction X under the force applied by the pilot valve part 20 and the electromagnetic drive part 300, so as to form the first overflow valve port 140 between the annular valve body part 1251 and the second valve seat 32 of the overflow valve seat 130.

[0047] For example, refer to Figures 1-2, the main overflow valve part 100 further comprises a first housing 110, at least part of the overflow valve seat 130 and the overflow valve body 120 are located in the first housing 110. The second valve seat 32 comprises a first partition part 321, a second partition part 322 and an outer ring part 323, the first partition part 321 is connected with the second partition part 322 and located at the side of the second partition part 322 close to the first valve seat 31, the outer ring part 323 is located at the end of the second partition part 322 close to the first housing 110 and connected with the second partition part 322, the outer ring part 323, the second partition part 322 and the first valve seat 31 surround to form a first cavity H1. The first partition part 321 and the first valve seat 31 are clamped to form an intermediate passage HM, and the first cavity H1 communicates with the first opening O1 through the intermediate passage HM. For example, the first overflow valve port 140 is formed between the annular valve body part 1251 and the second partition part 322 of the second valve seat 32.

[0048] In the state without forming the first overflow valve port 140, the annular valve body part 1251 is in contact with the second partition part 322, and there is no opening between the two, and fluid is not allowed to pass between the annular valve body part 1251 and the second partition part 322; the overflow valve body 120 moves in the first direction X under the action of the force jointly applied by the pilot valve part 20 and the electromagnetic driving part 300, thereby forming the above-mentioned first overflow valve port 140 between the annular valve body part 1251 and the second partition part 322 to allow fluid to pass through the first overflow valve port 140.

[0049] For example, the second valve body part 125 and the second valve seat 32 surround a main cavity H0, the main cavity H0 communicates with the third opening O3, and fluid from the third opening O3 can enter the main cavity H0, and when the first overflow valve port 140 is formed, the fluid can be discharged from the main cavity H0 through the first overflow valve port 140.

[0050] For example, referring to Figures 1-2 , the first valve seat 31 comprises a main body part 311 and a side part 312, the main body part 311 extends along the first direction X, and the side part 312 is located at the end of the main body part 311 close to the second valve seat 32, surrounds and is connected with the main body part 311; the first opening O1 is formed on the main body part 311, and the first opening O1 penetrates the main body part 311 along the first direction X; the second opening O2 is formed on the side part 312, and the second opening O2 penetrates the side part 312 along the first direction X, and the one-way push piece 1 is attached to the inner wall of the side part 312 under the pre-tightening force of the elastic member 2 to seal the second opening O2; the intersection part of the main body part 311 and the side part 312 and the first partition part 321 of the second valve seat 32 clamped to form an intermediate passage HM, and the side part 312, the second partition part 322 of the second valve seat 32 and the outer ring part 323 surround to form a first cavity H1.

[0051] For example, referring to Figure 1The main overflow valve part 100 further comprises a second cavity H2 between the first housing 110 and the overflow valve body 120, the second cavity H2 is in communication with the third opening O3 via the first overflow valve port 140, i.e. the second cavity H2 is in communication with the main cavity H0 via the first overflow valve port 140, thereby in communication with the third opening O3. The first housing 110 has a fourth opening O4, which is in communication with the second cavity H2.

[0052] For example, referring to Figure 1 The second partition 322 has a first portion 32a surrounding the first cavity H1 and intersecting with the outer ring portion, and further comprises a second portion 32b, which is located at an end of the first portion 32a close to the first housing 110, connected with the first portion 32a, and extends in the first direction X towards a direction away from the first portion 32a, the first portion 32a, the second portion 32a and the annular valve body portion 1251 surround the second cavity H2; the second cavity H2 is located between the second portion 32a of the second partition 322 and the annular valve body portion 1251. This design is conducive to improving the stability of the second valve seat 32 while realizing the fluid flow path required in the above-mentioned various cavities and solenoid valves.

[0053] For example, referring to Figure 1 The pilot valve part 200 comprises a second housing 210 and a pilot valve 220 located in the second housing 210. The first valve body portion 124 surrounds the pilot valve port 122, and the pilot valve 220 is arranged in cooperation with the pilot valve port 122. The pilot valve part 200 further comprises a floating ring 240 configured to form a pilot valve cavity H4 with the overflow valve body 120, and a pressure relief structure 290. The main overflow valve part 100 further comprises a third cavity H3 between the first housing 110 and the overflow valve body 120, the third cavity H3 is located on the side of the second cavity H2 close to the pilot valve part 200 in the first direction X, and is in communication with the second cavity H2. The floating ring 240 is configured to be movable in the first direction X to enable the pilot valve cavity H4 to be in communication with the third cavity H3 via the pressure relief structure 290.

[0054] In the solenoid valve provided in this embodiment, when the floating ring 240 is located closest to the overflow valve body 120, the pilot valve chamber H4 is connected to the third chamber H3 through the pressure relief structure 290. Therefore, the working fluid can enter the third chamber H3 through the pressure relief structure 290. Since the floating ring 240 is located closest to the overflow valve body 120, the working fluid can only enter the third chamber H3 through the pressure relief structure 290 with its smaller cross-sectional area, and cannot enter the third chamber H3 through the gap between the floating ring 240 and the overflow valve body 120, thus damping the entry of the working fluid into the third chamber H3. At this time, the pressure difference between the inlet (first opening O1) and outlet (fourth opening O4) of the solenoid valve 400 at a given flow rate is independent of the current. Therefore, the solenoid valve can efficiently achieve safety in case of failure, and the pressure difference before the turning current does not change with the current. After reaching the turning current, the pressure difference changes sharply, making the distinction between the two states very clear, which is more conducive to the controller's state recognition and makes it safer and more reliable. It should be noted that the gap between the floating ring and the overflow valve body caused by poor machining accuracy and errors is not considered as the pressure relief structure mentioned above.

[0055] In some examples, 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 the pressure relief opening 232, the working fluid (e.g., oil) in the pilot valve chamber H4 can enter the third chamber H3 from the pressure relief opening 232 of the flow pad 230. At the same time, since the floating ring 240 presses the flow pad 230 against the first valve body section 124, it can dampen the entry of the working fluid into the third chamber H3.

[0056] In some examples, such as Figure 1 As shown, the floating ring 240 is configured to be movable in a first direction X. The pilot valve section 200 also includes a preload spring 250, which is in contact with the floating ring 240 and configured to apply a force toward the first valve body section 124 or the flow pad 230 to the floating ring 240. Thus, the preload spring 250 applies a force toward the first valve body section 124 or the flow pad 230 to the floating ring 240, and the damping of the solenoid valve 400 can be set by adjusting the parameters of the preload spring 250.

[0057] For example, refer to Figure 1, the electromagnetic driving part 300 includes an armature support 320 configured to apply a force to the floating ring 240 away from the spool 120 to move the floating ring 240 in a direction away from the spool 120 when magnetized. Thus, when the electromagnetic driving part is not failed, the armature support is magnetized and applies a force to the floating ring away from the first valve body part or the overflow gasket, which can overcome the elastic force of the pre-tightening spring, so that the floating ring moves in a direction away from the overflow gasket, so that the floating ring no longer presses the overflow gasket. At this time, the pressure difference between the inlet (first opening O1) and outlet (fourth opening O4) of the electromagnetic valve 400 at a given flow rate is independent of the current.

[0058] When the pressure in the pilot valve cavity H4 balances with the pressure between the first valve body part 124 and the second valve body part 125, the spool 120 as a whole will move in the first direction X away from the overflow valve seat 130. That is, the spool 120 is configured to be movable in the first direction X under the action of the pressure from the pilot valve cavity H4 and the pressure from the fourth cavity H5 between the first valve body part 124 and the second valve body part 125 to form the first overflow valve port 140 described above. The pressure in the pilot valve cavity H4 is related to the force away from the first valve body part 124 applied by the armature support 320 of the electromagnetic driving part 300 to the floating ring 240 of the pilot valve part 200, which is applied by the armature support 320 of the electromagnetic driving part 300 when magnetized, so that it can be considered that the spool 120 is movable in the first direction under the action of the force applied by the pilot valve part 200 and the electromagnetic driving part 300

[0059] The working process and the fluid flow path of the electromagnetic valve 400 provided by the embodiment of the present disclosure in the forward working process and the reverse working process are described below.

[0060] In the forward working process, under the action of the pre-tightening force of the elastic member 2, the one-way push piece 1 is tightly attached to the inner wall of the first valve seat 31 having the first opening O1, for example, to the inner wall of the side part 312 of the first valve seat 31, to seal the second opening O2 and not allow fluid to pass through the second opening O2. The path of the fluid is Figure 1path 1, which is represented by a solid arrowed line. Referring to path 1, the fluid outside the first opening O1 enters the third opening O3 via the first opening O1, enters the main cavity H0 from the third opening O3, and then enters the second cavity H2 from the main cavity H0 via the first spill port 140, and is discharged from the solenoid valve 400 via the fourth opening O4. At this time, since the second opening O2 is sealed by the one-way push piece 1, the fluid entering the first opening O1 cannot be discharged from the solenoid valve 400 via the second opening O1. In this working process, the opening degree of the first spill port 140 can be continuously adjusted by continuously adjusting the control electromagnetic force by the electromagnetic driving part 300, so as to apply damping to the fluid in path 1, and the damping applied to the fluid can be continuously adjusted.

[0061] In the reverse working process, under the pressure of the fluid from the second opening O2, the applied pressure (or thrust) of the high-pressure fluid from the second opening O2 on the one-way push piece 1 is greater than the pre-tightening force of the elastic member 2 on the one-way push piece 1, so that the one-way push piece 1 moves in the first direction X away from the first opening O1 against the pre-tightening force of the elastic member 2 on the one-way push piece 1 and no longer seals the second opening O2, so that the elastic member 2 is elastically deformed to open the second opening O2. The path of the fluid is path 2 in Figure 1 path 2, which is represented by a solid arrowed line. Referring to path 2, the fluid outside the second opening O2 can enter the first cavity H1 via the second opening O2, and since the first cavity H1 is in communication with the first opening O1, the fluid flows from the first cavity H1 into the first opening O1, for example, from the first cavity H1 into the first opening O1 via the intermediate passage HM, and then the fluid is discharged from the solenoid valve 400 via the first opening O1. In this process, since the one-way push piece 1 needs to move to open the second opening O2 against the pre-tightening force of the elastic member 2 and the elastic force of the elastic member 2 on the one-way push piece 1 during elastic deformation, the fluid passing through the second opening O2 is damped, and the opening degree of the second opening O2 can be controlled by designing the pre-tightening force and the elastic coefficient of the elastic member 2, so as to control the flow of the fluid passing through the second opening O2, thereby controlling the damping applied to the fluid.

[0062] In addition, for example, referring to Figure 1 , the second valve body part 125 further includes an opening hole 1253 penetrating the plate-shaped valve body part 1252, and the opening hole 1253 is in communication with the main cavity H0 and the fourth cavity H5.

[0063] Based on the above structural design of the solenoid valve 400, in the forward working process, the solenoid valve 400 can also generate Figure 4The fluid path shown in path 3 is used to adjust the damping of the fluid entering the electromagnetic valve 400 through the path. Referring to path 3, the fluid outside the first opening O1 enters the third opening O3 through the first opening O1, thereby entering the main cavity H0, then the fluid can enter the fourth cavity H5 from the main cavity H0 through the opening hole 1253, then enter the pilot valve cavity H4 through the channel formed between the pilot valve 220 and the first valve body part 124, and then enter the third cavity H3 through the pressure relief structure 290. The fluid can enter the fourth opening O4 in communication with the third cavity H3, and then exit the electromagnetic valve 400 through the fourth opening O4.

[0064] The fluid in the present disclosure is, for example, a liquid, for example, an oil liquid, for example, an oil liquid applied in a shock absorber of a vehicle; or, in other scenarios where the electromagnetic valve provided by the embodiments of the present disclosure is applied, the fluid can also be a gas.

[0065] Figure 1 Figure 1 is a structural schematic diagram of a one-way push piece of an electromagnetic valve provided by an embodiment of the present disclosure. For example, in combination with Figures 3-4 and Figure 3 The first housing 110 can have a plurality of fourth openings O4 spaced apart from each other. For example, the plurality of fourth openings are arranged in a track in the shape of a ring, and the one-way push piece 1 is in the shape of a ring, and the ring-shaped one-way push piece 1 covers the plurality of fourth openings O4.

[0066] Of course, in other embodiments, the number of fourth openings can also be 1, and those skilled in the art can design according to the specific requirements of the fluid flow.

[0067] The shape of the cross section of the fourth opening O4 is not limited to being Figure 1 The shape of the cross section of the fourth opening O4 is circular, which is only an example, and the shape of the cross section of the fourth opening O4 is circular to facilitate processing and flow calculation.

[0068] For example, in combination with Figure 4 and Figure 1 The one-way push piece 1 is in the shape of a closed ring around the axis extending in the first direction X, which facilitates the processing and installation of the one-way push piece 1.

[0069] Alternatively, in other embodiments, the one-way push piece 1 can be an open arc to cover each fourth opening O4 and be able to fit the curved wall surface provided with the second opening O2. For example, a plurality of one-way push pieces corresponding to each fourth opening O4 can be provided. For example, the first housing 110 can have a plurality of fourth openings O4 spaced apart from each other, and the one-way push piece 1 includes a plurality of sub-parts spaced apart from each other, each sub-part covers at least one fourth opening O4 of the plurality of fourth openings O4; for example, the plurality of sub-parts one-to-one correspond to the plurality of fourth openings O4.

[0070] For example, refer to Figure 1 In the electromagnetic valve 400 provided by the embodiments of the present disclosure, at least a position opposite to the second opening O2 is provided with an elastic member 2. For example, in the embodiment shown in Figure 5 In the embodiment shown in the figure, the elastic member 2 covers the second opening O2 and exceeds the range of the second opening O2, the first end of the elastic member 2 is fixed on the first partition part 321 of the second valve seat 32, and the second end of the elastic member 2 is fixed on the outer ring part 323 of the second valve seat 32. In this way, the stability of the elastic member 2 can be increased, the stability of the control of the one-way push piece 1 by the elastic member 2 is improved, and the reliability and stability of the control of the fluid flow through the second opening O2 are improved.

[0071] Figure 5 is a structure diagram of the elastic member of the electromagnetic valve provided by an embodiment of the present disclosure. For example, refer to Figure 1 For example, the elastic member 2 is a spring, such as a wave spring, which can be made thinner and has better elastic control performance in the above-mentioned electromagnetic valve of the present application.

[0072] In other embodiments, the elastic member can be other types of springs, such as a coil spring, a disc spring, etc.

[0073] For example, in the electromagnetic valve provided by some embodiments, the one-way push piece 1 does not extend into the intermediate passage HM, so that the intermediate passage HM is always in communication with the first cavity.

[0074] For example, in the embodiment shown in Figure 1 In the embodiment shown in the figure, the one-way push piece 1 extends into the intermediate passage HM, and the one-way push piece 1 does not completely block the intermediate passage HM, and there is a gap (not shown) between the one-way push piece 1 and the inner wall of the intermediate passage HM, for example, there is a gap between the one-way push piece 1 and the first partition part 321 of the second valve seat 32, to allow the fluid to pass through the gap. Figure 1 It should be noted that in the embodiment shown in the figure, the one-way push piece 1 is in contact with the inner wall of the intermediate passage HM, and the one-way push piece 1 is in contact with the first partition part 321 of the second valve seat 32. Figures 1-2In the illustrated cross-section, no gap is shown between the one-way push piece 1 and the first partition 321 of the second valve seat 32, but in other cross-sections, a gap exists between the one-way push piece 1 and the first partition 321 of the second valve seat 32. Thus, the one-way push piece 1 can be prevented from completely blocking the intermediate passage HM, and if the one-way push piece 1 completely blocks the intermediate passage HM, the high-pressure fluid entering the first opening O1 can exert a large pressure on the portion of the one-way push piece 1 located in the intermediate passage HM, which generates a pushing force on the one-way push piece 1 in the first direction X away from the second opening O2, thereby increasing the risk of the one-way push piece 1 opening the second opening O2 by separating from the wall of the first valve seat 31 in which the second opening O2 is formed. Thus, the above design of the present disclosure can ensure the reliability of the sealing of the second opening O2 by the one-way push piece 1 during normal operation.

[0075] For example, referring to Figure 1 , the inner surface of the side portion 312 of the first valve seat 31 extends in the second direction Y along which the one-way push piece extends, and the second direction Y is substantially perpendicular to the first direction; in the state in which the first opening is sealed by the one-way push piece, the working surface of the one-way push piece for covering the first opening is attached to the inner surface of the side portion. The extension direction of the intermediate passage HM intersects both the second direction Y and the first direction X, i.e., the intermediate passage HM is inclined with respect to the side portion. Correspondingly, the inner surfaces of the intersection portions of the main portion 311 and the side portion 312 of the first valve seat 31 and the inner surface of the first partition 321 of the second valve seat 32 are all inclined and intersect both the second direction Y and the first direction X to sandwich the inclined intermediate passage HM. The inclined intermediate passage HM is advantageous for saving space, and on the basis of achieving the first opening O1, the second opening O2, the first cavity H1, and the intermediate passage HM, the structure of the first valve seat 31 and the second valve seat 32 is simplified, and the cooperative connection of the first valve seat 31 and the second valve seat 32 is facilitated.

[0076] For example, referring to Figure 1 The main overflow valve portion 100 further includes a stop spring 150 arranged between the first housing 110 and the second valve body portion 125 and fixedly connected with the first housing 110, e.g., arranged in the second cavity H2. Thus, the stop spring 150 can prevent the overflow valve seat 130 from loosening under various working conditions, provide a space for adjusting the gap between the overflow valve seat 130 and the overflow valve body 120, and support the second cavity H2 as a fluid passage.

[0077] In some examples, as Figure 1As shown, 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.

[0078] In some examples, as shown in Figure 1 As shown, 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 H4 and the upper cavity 360. Thus, the working fluid in the pilot valve cavity H4 can flow into the upper cavity 360, and the working fluid in the upper cavity 360 can flow into the pilot valve cavity H4, thereby providing a hydraulic circuit so that the pressures of the two cavities can be balanced, thereby improving the stability of the electromagnetic valve.

[0079] In some examples, as shown in Figure 1 As shown, the armature 340 further comprises a second communication groove 345 configured to communicate the two sides of the armature 340 in the first direction X, so that the pressures of the two sides of the armature 340 are balanced.

[0080] In some examples, as shown in Figure 6 As 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 housing 310.

[0081] The present disclosure at least one embodiment further provides a shock absorber, and the present disclosure embodiment further provides a shock absorber comprising any one of the electromagnetic valves provided by the present disclosure embodiment. The shock absorber applies a new electromagnetic valve structure design scheme provided by the present disclosure embodiment, and can control the flow direction and flow path of different fluids in different working states, such as the above-mentioned forward working process and reverse working process, bidirectional working state, and can respectively exert damping and adjust damping on the fluid in different working processes, thereby improving the processing capacity of the shock absorber for exerting damping on the fluid. Thus, the shock absorber adopts an integrated scheme, and can realize two working states on the basis of not changing the volume of the original electromagnetic valve and realizing the original functions. Moreover, the electromagnetic valve has a small structure volume, a simple structure, reduced parts, and is convenient for manufacturing and adjusting the parts, and is also conducive to reducing costs.

[0082] The damper provided by the embodiments of the present disclosure can be a damper of a mechanical device, for example, a damper of a vehicle.

[0083] Exemplarily, Figure 6 is a schematic diagram of a damper provided by an embodiment of the present disclosure. For example, referring to ​ The damper 500 includes a first cylinder 11. The inside of the first cylinder 11 is provided with a second cylinder and a third cylinder (not shown in the figure), the second cylinder is arranged outside the third cylinder (close to one side of the first cylinder 11), and the third cylinder is provided with a piston assembly inside, the piston assembly includes a piston rod 101. A first fluid passage is formed between the first cylinder and the second cylinder; a second fluid passage is formed between the second cylinder and the third cylinder. One of the first fluid passage and the second fluid passage can be a compression chamber, and the other can be a rebound chamber.

[0084] For example, the damper 500 includes a compression valve F1 and a rebound valve F2, the compression valve F1 is used to adjust the damping of the liquid when the damper 500 performs a compression process, and the rebound valve F2 is used to adjust the damping of the liquid when the damper 500 performs a rebound process.

[0085] The electromagnetic valve 400 provided by the embodiments of the present disclosure has a bidirectional working process, and in the forward working process and the reverse working process, the electromagnetic valve 400 has different adjustment paths, and the electromagnetic valve 400 in each working process can be used as a one-way valve. Therefore, it can be used as a rebound valve of a damper, and also can be used as a compression valve of a damper. Therefore, the flexibility of the electromagnetic valve applied to the damper as a one-way valve to realize multiple functions can be expanded.

[0086] For example, in the damper 500 provided by some embodiments, the electromagnetic valve 400 provided by the embodiments of the present disclosure is used as a rebound valve F2 of the damper 500. The damper 500 performs a rebound process, the one-way push piece 1 is sealed to the second opening O2 under the pre-tightening force of the elastic member 2, the overflow valve body 120 is driven to move in the first direction X to form the first overflow valve port 140, the fluid enters the electromagnetic valve from the first opening O1 of the rebound valve F2, enters the third opening O3 from the first opening O1, and flows out of the rebound valve F2 through the first overflow valve port 140. For example, in the rebound process of the damper 500, the electromagnetic valve 400 performs the above-mentioned forward working process.

[0087] For example, in the damper 500 provided by some embodiments, the electromagnetic valve 400 provided by the embodiments of the present disclosure is used as the compression valve F1 of the damper. Specifically, the damper 500 performs the compression process, the one-way push piece 1 opens the second opening O2 under the pressure of the fluid from the second opening O2, the fluid enters the first cavity H1 via the second opening O2, and the fluid is discharged from the first cavity H1 via the first opening O1 of the compression valve F1. For example, in the compression process performed by the damper 500, the electromagnetic valve 400 performs the reverse working process described above.

[0088] In the double-cylinder damper, oil needs to be supplied from the compression chamber to the recovery chamber during the compression stroke, and for this purpose, the double-valve damper needs to be provided with a control valve having a one-way valve. However, in the damper 500 provided by the embodiments of the present disclosure, the damper 500 can function as a one-way valve during the forward working process and the reverse working process, and thus it is not necessary to additionally increase a one-way valve in the damper 500. The one-way valve can be closed when the pressure in the recovery chamber is high and opened to supply fluid to the recovery chamber when the pressure in the recovery chamber is low, for example.

[0089] For example, in some embodiments, the first opening O1 can be communicated with the recovery chamber, the second opening O2 can be communicated with the compression chamber, and oil can be supplied to the recovery chamber during the reverse working process described above. Alternatively, in some embodiments, the fourth opening O4 can be communicated with the recovery chamber, and the first opening O1 can be communicated with the compression chamber, and oil can be supplied to the recovery chamber during the forward working process described above.

[0090] The following points also need to be explained:

[0091] (1) The drawings of the embodiments of the present disclosure only involve the structures involved in the embodiments of the present disclosure, and other structures can be referred to the general design.

[0092] (2) For the sake of clarity, the thickness of a layer or region is exaggerated or reduced in the drawings used to describe the embodiments of the present disclosure, that is, the drawings are not drawn according to the actual proportions.

[0093] (3) In the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0094] The above only describes exemplary embodiments of the present disclosure, and is not used to limit the protection scope of the present disclosure, and the protection scope of the present disclosure is determined by the appended claims.

Claims

1. An electromagnetic valve, comprising: a main relief valve portion, comprising a relief valve seat, a relief valve body, a one-way push piece and a resilient member, wherein the relief valve body is located on one side of the relief valve seat in a first direction; the relief valve seat comprises a first valve seat, a second valve seat and a first cavity, the first valve seat is located on a side of the second valve seat away from the relief valve body in the first direction, and is connected with the second valve seat, and the first valve seat and the second valve seat surround the first cavity; the first valve seat comprises a first opening and a second opening; the first opening communicates with the first cavity; the one-way push piece is located in the first cavity and covers the second opening; in a forward process, the one-way push piece is configured to seal the second opening under the pre-tightening force of the resilient member, and in a reverse process, is configured to open the second opening under the pressure of fluid from the second opening, fluid enters the first cavity through the second opening, and is discharged from the first cavity through the first opening; the electromagnetic valve further comprises a pilot valve portion and an electromagnetic drive portion, and the electromagnetic drive portion is located on a side of the pilot valve portion away from the main relief valve portion; the relief valve body is configured to be movable in the first direction under the force applied by the pilot valve portion and the electromagnetic drive portion, so that the first relief valve port is formed between the relief valve body and the relief valve seat.

2. The electromagnetic valve according to claim 1, wherein the second valve seat comprises a third opening, and the first opening communicates with the third opening; in the forward process, fluid enters the third opening through the first opening; in the reverse process, fluid enters the first cavity through the second opening, and is discharged from the first cavity through the first opening.

3. The electromagnetic valve according to claim 2, wherein the relief 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, and the second valve body portion is fixedly connected with the first valve body portion and comprises a plate-shaped valve body portion and a ring-shaped valve body portion; the plate-shaped valve body portion is arranged in opposite spacing with the first valve body portion, the ring-shaped valve body portion is located at the edge of the plate-shaped valve body portion, and a second end of the ring-shaped valve body portion away from the relief valve seat in the first direction is connected with the plate-shaped valve body portion; the first relief valve port is formed between the ring-shaped valve body portion and the second valve seat of the relief valve seat.

4. The electromagnetic valve according to claim 3, wherein the main relief valve portion further comprises a first housing, and at least part of the relief valve seat and the relief valve body are located in the first housing; the second valve seat comprises a first separation portion, a second separation portion and an outer ring portion, the first separation portion is connected with the second separation portion and located on a side of the second separation portion close to the first valve seat, the outer ring portion is located at one end of the second separation portion close to the first housing and connected with the second separation portion, and the outer ring portion, the second separation portion and the first valve seat surround to form the first cavity; the first separation portion and the first valve seat sandwich to form an intermediate passage, and the first cavity communicates with the first opening via the intermediate passage; the first relief valve port is formed between the ring-shaped valve body portion and the second separation portion of the second valve seat.

5. The electromagnetic valve according to claim 4, wherein The first valve seat comprises a main body part extending along the first direction and a side part surrounding and connected with the main body part at one end of the main body part close to the second valve seat; The main body part is provided with the first opening penetrating the main body part along the first direction, and the side part is provided with the second opening penetrating the side part along the first direction, and the one-way push piece is attached to the inner wall of the side part to seal the second opening under the pre-tightening force of the elastic member; The intersection part of the main body part and the side part and the first separation part of the second valve seat sandwich to form the intermediate passage, and the side part, the second separation part of the second valve seat and the outer ring part surround to form the first cavity.

6. The electromagnetic valve according to claim 4, wherein The one-way push piece does not extend into the intermediate passage, or The one-way push piece extends into the intermediate passage, and the one-way push piece does not completely block the intermediate passage, and there is a gap between the one-way push piece and the inner wall of the intermediate passage.

7. The electromagnetic valve according to claim 4, wherein The elastic member covers the second opening and exceeds the range of the second opening, the first end of the elastic member is fixed on the first separation part of the second valve seat, and the second end of the elastic member is fixed on the outer ring part of the second valve seat.

8. The electromagnetic valve according to claim 5, wherein The inner surface of the side part of the first valve seat extends along the second direction, the one-way push piece extends along the second direction, and the second direction is substantially perpendicular to the first direction; In the state that the first opening is sealed by the one-way push piece, the working surface of the one-way push piece for covering the first opening is attached to the inner surface of the side part; The extension direction of the intermediate passage intersects with the second direction and the first direction.

9. The electromagnetic valve according to claim 3, wherein The main overflow valve part further comprises a first housing, at least part of the overflow valve seat and the overflow valve body are located in the first housing; The main overflow valve part further comprises a second cavity between the first housing and the overflow valve body, the second cavity can communicate with the third opening through the first overflow valve port; The first housing has a fourth opening, and the fourth opening communicates with the second cavity.

10. The electromagnetic valve according to claim 9, wherein The first housing has a plurality of fourth openings spaced apart from each other; The track of the plurality of fourth openings is annular as a whole, and the one-way push piece is annular and covers the plurality of fourth openings.

11. The electromagnetic valve according to claim 10, wherein The one-way push piece is a closed annular or an unclosed arc around the axis extending along the first direction; The elastic member is a closed annular or an unclosed annular around the axis extending along the first direction.

12. The electromagnetic valve according to claim 9, wherein The pilot valve part comprises a second housing and a pilot valve located in the second housing; 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 overflow valve body; The main overflow valve part further comprises a third cavity between the first housing and the overflow valve body, the third cavity is located on one side of the second cavity close to the pilot valve part in the first direction and communicates with the second cavity; The floating ring is configured to be movable in the first direction to cause the pilot valve cavity to communicate with the third cavity through the pressure relief structure.

13. The electromagnetic valve according to claim 12, wherein The electromagnetic drive portion includes an armature support configured to apply a force to the floating ring away from the spill valve body to cause the floating ring to move in a direction away from the spill valve body when magnetized by a magnet; The spill valve body is configured to be movable in the first direction to form the first spill valve port under pressure from the pilot valve cavity and pressure from a fourth cavity between the first valve body portion and the second valve body portion.

14. A shock absorber comprising the electromagnetic valve according to any one of claims 1-13.

15. The shock absorber according to claim 14, the electromagnetic valve is used as a rebound valve of the shock absorber, the shock absorber performs a rebound process, the one-way push piece seals the second opening under the pre-tightening force of the elastic member, the spill valve body is driven to move in the first direction to form a first spill valve port, fluid enters the electromagnetic valve from a first opening of the rebound valve and flows out of the rebound valve through the first spill valve port; or, the compression valve of the shock absorber is the electromagnetic valve, the shock absorber performs a compression process, the one-way push piece opens the second opening under the pressure of fluid from the second opening, fluid enters the first cavity through the second opening and is discharged from the first cavity through the first opening to the compression valve.

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