Solenoid valve and damper

Abstract

An electromagnetic valve and a shock absorber, the electromagnetic valve comprising a pilot valve portion including a pilot valve and a spool. The spool surrounds the pilot valve in a manner around a first direction; the pilot valve includes a through hole that penetrates a first end surface of the pilot valve facing the spool; the spool includes a spool passage including a lateral spool passage that penetrates an inner surface of the spool opposite the first end surface of the pilot valve, a portion of the through hole exposed by the lateral spool passage and communicating with the lateral spool passage constituting a pilot valve port; the pilot valve is configured to be movable in the first direction to change the size of the pilot valve port. The electromagnetic valve can be used in a shock absorber, which can be used in any device requiring damping such as a running vehicle. The electromagnetic valve is capable of adjusting the size of the pilot valve port by adjusting the operating current of the electromagnetic valve, thereby adjusting the pressure in the pilot valve in the balanced state, thereby achieving the adjustment of the pressure of the fluid entering the electromagnetic valve.

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 it rebounds after absorbing vibration, 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 pilot valve part, the pilot valve part comprising a pilot valve and a flow divider. The flow divider surrounds the pilot valve in a manner around a first direction; the pilot valve comprises a through hole penetrating a first end surface of the pilot valve facing the flow divider; the flow divider comprises a flow divider passage, the flow divider passage comprising a transverse flow divider passage penetrating an inner surface of the flow divider opposite the first end surface of the pilot valve, a portion of the through hole exposed by the transverse flow divider passage and communicating with the transverse flow divider passage constituting a pilot valve port; the pilot valve is configured to be movable in the first direction to change the size of the pilot valve port.

[0005] For example, the electromagnetic valve provided by an embodiment of the present disclosure further comprises a main overflow valve part, the main overflow valve part being located on a first side of the pilot valve in the first direction and comprising an overflow valve body; the pilot valve has a lower wall close to the overflow valve body in the first direction and a pilot valve inlet penetrating the lower wall in the first direction, the pilot valve inlet communicating with the through hole; there is a first gap between a surface of the overflow valve body close to the pilot valve in the first direction and the lower wall of the pilot valve, the first gap communicating with the pilot valve inlet, and the surface of the overflow valve body close to the pilot valve in the first direction is in abutment with a surface of the flow divider close to the overflow valve body in the first direction.

[0006] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, a groove is formed on the outer surface of the lower wall of the pilot valve, and the first gap is formed between the groove and the surface of the overflow valve body close to the pilot valve in the first direction.

[0007] For example, the electromagnetic valve provided by an embodiment of the present disclosure includes a main overflow valve part, a pilot valve, and a first valve body. The main overflow valve part includes a first valve body part, a first annular valve body part located at an edge of the first valve body part, and a first valve body opening penetrating through the first valve body part. The pilot valve includes a second valve body part, a second annular valve body part located at an edge of the second valve body part, and a second valve body opening penetrating through the second valve body part. The first annular valve body part is located outside the second annular valve body part and connected with the second annular valve body part. The second valve body part is oppositely spaced apart from the first valve body part in the first direction to form an intermediate cavity therebetween. The second valve body part is located at a side of the first valve body part away from the pilot valve. The second valve body opening is opposite to the first valve body opening. A first end of the overflow valve cover is fixed in the first valve body opening. A second end of the overflow valve cover is fixed in the second valve body opening.

[0008] For example, the electromagnetic valve provided by an embodiment of the present disclosure includes a main overflow valve part, a pilot valve, and a first valve body. The main overflow valve part includes a first valve body part, a first annular valve body part located at an edge of the first valve body part, and a first valve body opening penetrating through the first valve body part. The pilot valve includes a second valve body part, a second annular valve body part located at an edge of the second valve body part, and a second valve body opening penetrating through the second valve body part. The first annular valve body part is located outside the second annular valve body part and connected with the second annular valve body part. The second valve body part is oppositely spaced apart from the first valve body part in the first direction to form an intermediate cavity therebetween. The second valve body part is located at a side of the first valve body part away from the pilot valve. The second valve body opening is opposite to the first valve body opening. A first end of the overflow valve cover is fixed in the first valve body opening. A second end of the overflow valve cover is fixed in the second valve body opening.

[0009] For example, the electromagnetic valve provided by an embodiment of the present disclosure includes a main overflow valve part, a pilot valve, and a first valve body. The main overflow valve part includes a first valve body part, a first annular valve body part located at an edge of the first valve body part, and a first valve body opening penetrating through the first valve body part. The pilot valve includes a second valve body part, a second annular valve body part located at an edge of the second valve body part, and a second valve body opening penetrating through the second valve body part. The first annular valve body part is located outside the second annular valve body part and connected with the second annular valve body part. The second valve body part is oppositely spaced apart from the first valve body part in the first direction to form an intermediate cavity therebetween. The second valve body part is located at a side of the first valve body part away from the pilot valve. The second valve body opening is opposite to the first valve body opening. A first end of the overflow valve cover is fixed in the first valve body opening. A second end of the overflow valve cover is fixed in the second valve body opening.

[0010] For example, the electromagnetic valve provided by an embodiment of the present disclosure includes a main overflow valve portion, a first annular valve body portion, a second annular valve body portion, a first plate-shaped valve body portion, a second plate-shaped valve body portion, a pilot valve, a flow distribution block, and a first housing.

[0011] For example, the electromagnetic valve provided by an embodiment of the present disclosure includes a main overflow valve portion, a first annular valve body portion, a second annular valve body portion, a first plate-shaped valve body portion, a second plate-shaped valve body portion, a pilot valve, a flow distribution block, and a first housing.

[0012] For example, the electromagnetic valve provided by an embodiment of the present disclosure includes a main overflow valve portion, a first annular valve body portion, a second annular valve body portion, a first plate-shaped valve body portion, a second plate-shaped valve body portion, a pilot valve, a flow distribution block, and a first housing.

[0013] For example, the electromagnetic valve provided by an embodiment of the present disclosure includes a main overflow valve portion, a first annular valve body portion, a second annular valve body portion, a first plate-shaped valve body portion, a second plate-shaped valve body portion, a pilot valve, a flow distribution block, and a first housing.

[0014] For example, the electromagnetic valve provided by an embodiment of the present disclosure includes a main overflow valve portion, a first annular valve body portion, a second annular valve body portion, a first plate-shaped valve body portion, a second plate-shaped valve body portion, a pilot valve, a flow distribution block, and a first housing.

[0015] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the flow distribution block has a boss that protrudes in the first direction from a plane in which the first communication hole, the second communication hole, and the flow distribution hole each terminate at an end of the main spill valve portion in the first direction, and that separates the first communication hole and the second communication hole from the flow distribution hole of the flow distribution block, the first communication hole and the second communication hole being located on an inner side of the boss, the flow distribution hole of the flow distribution block being located on an outer side of the boss, and the boss being configured to prevent the flow of liquid between the inner side and the outer side of the boss.

[0016] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the electromagnetic valve further includes a safety sheet, a flow-through spring, and a safety washer. The safety sheet is located on a side of an upper surface of the flow distribution block that is distal from the main spill valve portion, covers the longitudinal flow distribution passage, and has a plurality of small holes corresponding to the longitudinal flow distribution passage; the flow-through spring is located above the safety sheet and is capable of elastic deformation; and the safety washer is located above the flow-through spring, the flow-through spring being located between the safety washer and the safety sheet, and the safety washer being configured to, in a de-energized state of the electromagnetic valve, not exert a magnetic force on the flow-through spring and the safety sheet, so that the safety sheet is adhered to the upper surface of the flow distribution block under the pressure of fluid above the safety sheet, and fluid from the pilot valve flows out of the electromagnetic valve through the plurality of small holes of the safety sheet after passing through the longitudinal flow distribution passage, and, in an energized state of the electromagnetic valve, to exert a magnetic force on the flow-through spring and the safety sheet to cause the flow-through spring and the safety sheet to be attracted to a lower surface of the safety washer, so that a gap is formed between the safety sheet and the flow distribution block.

[0017] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the flow distribution hole includes a first sub-portion and a second sub-portion that are in communication and partially offset in the first direction; in the first direction, the second sub-portion is located on a side of the first sub-portion that is proximal to the main spill valve portion and on an outer side of the first sub-portion.

[0018] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the flow distribution block is annular, the longitudinal flow distribution passage and the flow distribution hole each pass through a line connecting a center of an end of the upper surface of the flow distribution block distal from the main spill valve portion and a center of the annular circle at an angle of 90°; and / or, a line connecting a center of the second communication hole of the flow distribution block and the center of the annular circle and a line connecting a center of an end of the longitudinal flow distribution passage passing through the upper surface of the flow distribution block and the center of the annular circle are at an angle of 90°.

[0019] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the area of the upper surface of the pilot valve away from the main spill valve portion in the first direction is smaller than the area of the lower surface of the pilot valve close to the main spill valve portion in the first direction.

[0020] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the electromagnetic valve further comprises an electromagnetic driving portion located on the second side of the pilot valve portion in the first direction, the second side of the pilot valve portion being opposite to the first side of the pilot valve portion; the electromagnetic driving portion comprises an armature shaft, the armature shaft being configured to apply a force towards the main spill valve portion to the pilot valve under the condition that a given current is applied to the electromagnetic driving portion.

[0021] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the pilot valve comprises a first end surface in a second direction and a second end surface opposite to the first end surface, the second direction being perpendicular to the first direction; the through hole penetrates the first end surface and the second end surface of the pilot valve along the second direction; the lateral diversion passage comprises a first lateral diversion passage and a second lateral diversion passage respectively arranged corresponding to a first end of the through hole in the second direction and a second end of the through hole in the second direction; the first lateral diversion passage penetrates an inner surface of the diversion block opposite to the first end surface of the pilot valve, and a portion of the first end of the through hole exposed by the first lateral diversion passage and in communication with the first lateral diversion passage constitutes a first pilot valve port; the second lateral diversion passage penetrates an inner surface of the diversion block opposite to the second end surface of the pilot valve, and a portion of the second end of the through hole exposed by the second lateral diversion passage and in communication with the second lateral diversion passage constitutes a second pilot valve port; the pilot valve is configured to be movable in the first direction to change the size of the first pilot valve port and the size of the second pilot valve port.

[0022] For example, in the electromagnetic valve provided by an embodiment of the present disclosure, the lateral diversion passage is a closed annular groove around the pilot valve, and the first lateral diversion passage and the second lateral diversion passage are in communication with each other to constitute the closed annular groove; or, the first lateral diversion passage and the second lateral diversion passage are arranged separately from each other and are respectively an unclosed arc-shaped groove around the pilot valve.

[0023] At least one embodiment of the present disclosure further provides a shock absorber, and an embodiment of the present disclosure further provides a shock absorber comprising any one of the electromagnetic valves provided by an embodiment of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0024] 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 in the following description are only some embodiments of the present application and not limit the present application.

[0025] Figure 1 A first cross-sectional schematic view of an electromagnetic valve according to an embodiment of the present disclosure is provided.

[0026] Figure 2 A second cross-sectional schematic view of an electromagnetic valve according to an embodiment of the present disclosure is provided.

[0027] Figure 3 A Figures 1-2 schematic view of the appearance structure of an electromagnetic valve is provided.

[0028] Figure 4 A Figures 1-2 schematic view of the structure of a pilot valve of the electromagnetic valve is shown.

[0029] Figure 5 A cross-sectional schematic view along the A-A line in Figure 4 is provided.

[0030] Figure 6 A schematic view from the B direction in Figure 4 is provided.

[0031] Figure 7 A Figures 1-2 schematic view of the three-dimensional structure of the pilot valve of the electromagnetic valve is shown.

[0032] Figure 8 A Figures 1-2 schematic view of the structure of a flow distribution block of the electromagnetic valve is shown.

[0033] Figure 9 A cross-sectional schematic view along the B-B line in Figure 8 is provided (the pilot valve is shown in Figure 9 ).

[0034] Figure 10 A cross-sectional schematic view along the C-C line in Figure 8 is provided (the pilot valve is shown in Figure 10 ).

[0035] Figure 11 A Figures 1-2 schematic view of the three-dimensional structure of the flow distribution block of the electromagnetic valve is shown.

[0036] Figure 12 A Figures 1-2 schematic view of the structure of a main spill valve body of the electromagnetic valve is shown, including an enlarged schematic view of a portion L.

[0037] Figure 13 AFigures 1-2 Structure diagram of the failure protection structure of the electromagnetic valve shown;

[0038] Figure 14 is a cross-sectional view along the line D-D in Figure 13

[0039] Figure 15 is a cross-sectional view along the line E-E in Figure 13

[0040] Figure 16 is a schematic diagram of a shock absorber provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0041] 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 only a part 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 any creative effort belong to the scope of protection of the present application.

[0042] 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 application belongs. The terms "first", "second" and similar terms used in the description and claims of the present application do not denote any order, quantity or importance, but are 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, and do not exclude other elements or objects. "In", "out", "up", "down", and the like are only used to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships may also be changed accordingly.

[0043] 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, and 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.

[0044] ​​The terms "parallel", "perpendicular", and "identical" and the like used in the present disclosure include the strict sense of "parallel", "perpendicular", "identical" and the like, and also include cases where "substantially parallel", "substantially overlapping", "substantially identical" and the like include certain errors, taking into account measurement and errors related to measurement of a specific amount (for example, limitations of a measurement system), and represent an acceptable deviation range for a specific value determined by a person of ordinary skill in the art. For example, "substantially" can mean within one or more standard deviations, and unless otherwise specified, can mean within a 10% or 5% deviation range of the value.

[0045] With the development of automobile electrification and automatic driving technology, the weight of the automobile increases, and the power performance is also improved, so it is necessary for the shock absorber to work in a wider range, and thus the damping characteristics of the shock absorber need to be continuously adjustable. In this regard, an electromagnetic valve with continuously adjustable damping can be used to achieve continuously adjustable damping characteristics of the shock absorber.

[0046] The electromagnetic valve with continuously adjustable damping used in the automobile shock absorber needs to achieve two functions: one is continuously adjustable damping, at this time the working current range of the electromagnetic valve is I ~ Imax, the other is safety in failure, at this time the working current range of the electromagnetic valve is 0 ~ I. That is, in addition to being able to achieve continuously adjustable damping under the drive of the working current, the electromagnetic valve used in the automobile shock absorber also needs to ensure safety in the case of power failure or driver failure, so as to ensure basic driving and steering safety. For example, the damping of the electromagnetic valve can be kept at a middle value within its adjustable range in the case of power failure or driver failure, so as to ensure basic driving and steering safety. It should be noted that the above I can also be referred to as a turning current, which can usually be 300 ~ 450mA, and individually up to 600mA.

[0047] The electromagnetic valve provided by the embodiment of the present disclosure comprises a pilot valve part, the pilot valve part comprises a pilot valve and a flow divider. The flow divider surrounds the pilot valve in a manner surrounding a first direction; the pilot valve comprises a through hole penetrating a first end surface of the pilot valve facing the flow divider; the flow divider comprises a flow divider passage, the flow divider passage comprises a transverse flow divider passage penetrating an inner surface of the flow divider opposite to the first end surface of the pilot valve, and a part of the through hole exposed by the transverse flow divider passage and in communication with the transverse flow divider passage constitutes a pilot valve port; the pilot valve is configured to be movable in the first direction to change the size of the pilot valve port. The electromagnetic valve provided by the embodiment of the present disclosure can be used in a shock absorber which can be used in any device requiring damping such as a driving vehicle. The electromagnetic valve can adjust the pressure of the fluid in the pilot valve in a balanced state through the pilot valve port. Moreover, the size of the pilot valve port can be adjusted by adjusting the working current of the electromagnetic valve, so as to adjust the pressure of the fluid in the pilot valve in a balanced state, thereby realizing the adjustment of the pressure of the fluid entering the electromagnetic valve.

[0048] The shock absorber provided by the embodiment of the present disclosure comprises any one of the electromagnetic valves provided by the embodiments of the present disclosure. The shock absorber provided by the embodiment of the present disclosure can be used in any device requiring damping such as a driving vehicle. The shock absorber adopts a new design of the electromagnetic valve applicable to the shock absorber, so as to effectively adjust the pressure of the fluid entering the electromagnetic valve in the working process of the shock absorber.

[0049] Exemplarily, Figure 1 A first cross-sectional schematic view of an electromagnetic valve provided by an embodiment of the present disclosure, Figure 2 A second cross-sectional schematic view of an electromagnetic valve provided by an embodiment of the present disclosure, Figure 3 For Figures 1-2 A schematic view of the appearance structure of the electromagnetic valve provided. Referring to Figure 1 、 Figure 2 and Figure 3 The electromagnetic valve 400 comprises a pilot valve part 200, the pilot valve part 200 comprises a pilot valve 1 and a flow divider 2. The flow divider 2 surrounds the pilot valve 1 in a manner surrounding a first direction X; the pilot valve 1 comprises a through hole V1 penetrating a first end surface S11 of the pilot valve 1 facing the flow divider 2; the flow divider 2 comprises a flow divider passage 21, the flow divider passage 21 comprises a transverse flow divider passage 211 penetrating an inner surface S21 of the flow divider 2 opposite to the first end surface S11 of the pilot valve 1, and the through hole V1 has an opening O1 (see Figure 4 and Figure 5), the portion of the through hole V1 exposed to and communicated with the transverse shunt passage 211 constitutes the pilot valve port 11, that is, the portion of the opening O1 exposed to and communicated with the transverse shunt passage 211 constitutes the pilot valve port 11; the pilot valve 1 is configured to be movable in the first direction X to change the size of the pilot valve port 11. In the process of moving the pilot valve 1 in the first direction X, the size of the portion of the pilot valve port 11 covered by the inner surface S21 of the shunt block 2 is also changed, thereby changing the size of the pilot valve port 11.

[0050] In the design scheme of the electromagnetic valve provided by the embodiment of the present disclosure, the pilot valve port 11 enables the through hole V1 of the pilot valve 1 to be communicated with the shunt passage 21 of the shunt block 2, so that the fluid entering the electromagnetic valve 400 can flow out through the through hole V1 of the pilot valve 1, the pilot valve port 11 and the shunt passage 21, thereby forming a fluid outflow channel and adjusting the pressure inside the pilot valve 1. Under a given working current, the pilot valve 1 is movable in the first direction X in the process of reaching force balance and finally moves to a balance position. The movement of the pilot valve 1 in the first direction X changes the size of the pilot valve port 11, so that the pressure inside the pilot valve 1 in the balance state can be adjusted through the pilot valve port 11. Moreover, the size of the pilot valve port 11 can be adjusted by adjusting the working current of the electromagnetic valve 400, so as to adjust the pressure inside the pilot valve 1 in the balance state, thereby achieving the adjustment of the pressure of the fluid entering the electromagnetic valve 400. The electromagnetic valve 400 provided by the embodiment of the present disclosure can be used in a shock absorber, and a new design of the electromagnetic valve applicable to the shock absorber is provided to effectively adjust the pressure of the fluid entering the electromagnetic valve in the working process of the shock absorber.

[0051] For example, the fluid can be oil, and the fluid outflow channel is an oil return channel. Of course, the fluid described in the present disclosure is not limited to oil, but can be any liquid or gas.

[0052] For example, referring to Figure 1 and Figure 2 , the electromagnetic valve 400 further comprises a main spill valve portion 100 located on the first side of the pilot valve 1 in the first direction X and comprising a spill valve body 3. The pilot valve 1 has a lower wall S12 (for the sake of clear labeling, see the labels in Figure 5 and Figure 7 ) close to the spill valve body 3 in the first direction X and a pilot valve inlet OP1 penetrating the lower wall in the first direction X, the pilot valve inlet OP1 being communicated with the through hole V1. Referring to Figure 1, a first gap G1 exists between the surface of the spill valve body 3 close to the pilot valve 1 in the first direction X and the lower wall S12 of the pilot valve 1, and the first gap G1 is in communication with the pilot valve inlet OP1. When fluid enters the electromagnetic valve 400, the fluid is allowed to enter the first gap G1, so that the pilot valve 1 is applied with a force away from the spill valve body 3 in the first direction X by the liquid in the first gap G1, and the fluid can enter the internal cavity of the pilot valve 1 through the pilot valve inlet OP1. In addition, the surface of the spill valve body 3 close to the pilot valve 1 in the first direction X and the surface of the flow divider 2 close to the spill valve body 3 in the first direction X are in close contact, and the close contact between the two surfaces does not allow fluid to enter the gap between the two surfaces.

[0053] Figure 4 is a schematic view of the structure of the pilot valve of the electromagnetic valve shown in Figures 1-2 , Figure 5 is a schematic view of the cross section along the A-A line in Figure 4 , Figure 6 is a schematic view from the B direction in Figure 4 , Figure 7 is a schematic view of the three-dimensional structure of the pilot valve of the electromagnetic valve shown in Figures 1-2 . For example, in combination with Figure 1 , Figure 5 and Figure 7 , a groove 12 is formed on the outer surface of the lower wall S12 of the pilot valve 1, and the groove 12 forms the above-mentioned first gap G1 between the surface of the spill valve body 3 close to the pilot valve 1 in the first direction X. The design of the groove 12 is beneficial to ensure the formation of the first gap G1 and simplify the structure of the electromagnetic valve.

[0054] For example, in the example shown in Figure 7 , a plurality of grooves 12 can be provided at intervals, which is beneficial to design the size of the groove 12 according to the design requirements to meet the size requirements of the first gap G1. For example, four grooves 12 are provided, and the two grooves 12 opposite to each other are axisymmetric, and the symmetric design is beneficial to the balance of the structure during work. Of course, in other embodiments, the number of grooves 12 can also be 1 or other numbers, and the number of grooves 12 is not limited in the embodiments of the present disclosure, which is not limited to the numbers listed above.

[0055] For example, referring to Figure 1 and Figure 2 , the electromagnetic valve further comprises an electromagnetic driving part 300, and the electromagnetic driving part 300 is located on the second side of the pilot valve part 200 in the first direction X, and the second side of the pilot valve part 200 is opposite to the first side of the pilot valve part 200. The electromagnetic driving part 300 comprises an armature shaft 330, and the armature shaft 330 is configured to apply a force to the pilot valve 1 towards the main spill valve part 100 under the condition that a given current is applied to the electromagnetic driving part 300, i.e. in the first direction X. Figure 1downward force. When the electromagnetic driving part is not failed, the armature shaft 330 is magnetized and applies a force toward the main relief valve part 100 to the pilot valve 1.

[0056] For example, as shown in Figure 1 , the electromagnetic driving part 300 further comprises a third housing 301 and an armature 340. The armature shaft 330 and the armature 340 are both located in the third housing 301, and the first end of the armature shaft 330 is connected with the pilot valve 1, so that the armature shaft 330 transmits the electromagnetic force generated by the armature 340 to the pilot valve 1, thereby applying the above-mentioned force toward the main relief valve part 100 to the pilot valve 1. For example, the electromagnetic driving part 300 further comprises a resilient member 370, which is located between the first end of the armature shaft 330 and the pilot valve 1, and connects the first end of the armature shaft 330 with the pilot valve 1, so that the armature shaft 330 transmits the electromagnetic force generated by the armature 340 to the pilot valve 1 through the resilient member 370. As the pilot valve 1 is adjusted to different equilibrium states, the position of the pilot valve 1 in the first direction X changes, and the resilient member 370 can also play a buffering role in the process of the change of the position of the pilot valve 1.

[0057] For example, as shown in Figure 1 , the electromagnetic driving part 300 further comprises a magnetic shield ring 350 and an electromagnet 360. The magnetic shield ring 350 is sleeved on the armature 340, and the electromagnet 360 is located between the magnetic shield ring 350 and the third housing 301.

[0058] For example, referring to Figure 1 and Figure 2 , the main relief valve part 100 further comprises a liquid inlet H1, a relief valve cover 4 and a slide rod 5. The relief valve cover 4 comprises a main body 40 and a through hole V2 extending through the main body 40 along the first direction X, and the main body 40 of the relief valve cover 4 passes through the relief valve body 3 along the first direction X, the first end of the through hole V2 communicates with the liquid inlet H1, and the second end of the through hole V2 communicates with the pilot valve inlet OP1. The slide rod 5 extends along the first direction X and enters the pilot valve 1 through the through hole V2 and the pilot valve inlet OP1. The pilot valve 1 further comprises an upper wall S13 opposite to the lower wall S12 in the first direction X, and the first end of the slide rod 5 in the first direction X is located in the through hole V2 and has a second gap G2 between the hole wall of the through hole V2, and the second end of the slide rod 5 in the first direction X is connected with the upper wall S13 of the pilot valve 1, for example, with the inner surface of the upper wall S13 of the pilot valve 1. Thus, the fluid enters the through hole V2 through the liquid inlet H1, enters the first gap G1 through the second gap G2, and enters the internal cavity of the pilot valve 1 through the pilot valve inlet OP1. Thus, on the one hand, the first end (lower end in the first direction X) of the slide rod 5 and the lower end of the pilot valve 1 are respectively subjected to the upward force (i.e., the force away from the relief valve body 3 along the first direction X, Figure 1 Figure 1 ​(The direction shown is upward), the fluid in the first gap G1 applies this upward force to the pilot valve 1, the fluid in the through hole V2 applies this upward force to the first end of the slide rod 5, and the upper end of the pilot valve 1 is subjected to a downward force (i.e., a force along the first direction X toward the overflow valve body 3) by the fluid above it (described below). Figure 1 The direction shown is downward) and the downward force applied by the constant force electromagnet (i.e., the force transmitted to the pilot valve 1 through the armature shaft 330). The operating current of the solenoid valve 400 can be adjusted by the control circuit. Under a given operating current, the pilot valve 1 can reach a state of force balance under the action of at least the above four forces, thereby moving to the equilibrium position. On the other hand, after the fluid enters the solenoid valve 400 through the inlet H1, it is slowed down when it passes through the second gap G2, thereby controlling the flow rate of the fluid and preventing excessive flow into the pilot valve.

[0059] For example, refer to Figure 4 The area of ​​the upper surface S14 of the pilot valve 1, which is away from the main relief valve section 100 in the first direction X, is smaller than the area of ​​the lower surface of the pilot valve 1, which is close to the main relief valve section 100 in the first direction X. The difference between the area of ​​the upper surface S14 and the lower surface S15 of the pilot valve 1 makes it easier to achieve an upward force (e.g., hydraulic pressure) applied by the fluid to the lower end of the slide rod 5 and the lower end of the pilot valve 1, and a downward force applied by the fluid and the constant force electromagnet to the upper end of the pilot valve 1. This area relationship allows for a stable and rapid response of the entire solenoid valve.

[0060] Figure 12 yes Figures 1-2 The schematic diagram of the main relief valve body of the solenoid valve shown includes an enlarged view of a portion L. (Reference) Figure 12 For example, the second gap G2 is an annular gap, that is, an annular gap around the first direction X, such as a closed annular gap around the slide bar 5. Designing the second gap G2 as a closed annular gap is beneficial for controlling the fluid flow rate and for design calculations, and it is also easy to manufacture. Of course, in other embodiments, the second gap G2 may not be a closed annular gap, and the second gap may also include multiple spaced-apart sections, as long as a small gap can be formed there so that the fluid is decelerated as it passes through the second gap.

[0061] For example, the overflow valve cover 4 has a larger dimension along the first direction X than its dimension along the second direction Y, which is perpendicular to the first direction X, to form a relatively elongated channel for fluid flow extending along the first direction X. For example, the cross-sectional shape of the overflow valve cover 4 is basically "U" shaped.

[0062] For example, combining Figure 1 andFigures 5-7 The pilot valve 1 further comprises a slide rod 5 fitting hole V3 on the inner surface of the upper wall S13, which is located on the side of the through hole away from the pilot valve inlet OP1 in the first direction X, and the second end of the slide rod 5 is embedded in the slide rod 5 fitting hole V3 to connect with the upper wall S13 of the pilot valve 1.

[0063] For example, referring to Figure 12 The through hole V2 comprises a first sub-portion V21 near the upper cover plate 41 of the pilot valve 1 and a second sub-portion V22 located on the side of the first sub-portion V21 away from the pilot valve 1, and the slide rod 5 passes through the second sub-portion V22 and the first sub-portion V21 in sequence. The second gap G2 comprises a first sub-gap G21 between the hole wall of the first sub-portion V21 and the slide rod 5 and a second sub-gap G22 between the hole wall of the second sub-portion V22 and the slide rod 5, the hole diameter of the first sub-portion V21 is smaller than that of the second sub-portion V22, and the width of the first sub-gap G21 is smaller than that of the second sub-gap G22. The hole diameter refers to the size in the radial direction, and in the embodiments of the present disclosure, the plane formed by the radial direction is perpendicular to the first direction X. Designing the second sub-gap G22 with a narrower width can control the flow rate while making the pressure flow characteristic less affected by temperature, thereby making the working state of the electromagnetic valve more stable.

[0064] For example, referring to Figure 1 and Figure 2The overflow valve body 3 comprises a first valve body part 31 and a second valve body part 32. The first valve body part 31 comprises a first plate-shaped valve body part 311, a first ring-shaped valve body part 312 located at the edge of the first plate-shaped valve body part 311, and a first valve body opening 313 penetrating the first plate-shaped valve body part 311. The second valve body part 32 is fixedly connected with the first valve body part 31, and comprises a second plate-shaped valve body part 321, a second ring-shaped valve body part 322 located at the edge of the second plate-shaped valve body part 321, and a second valve body opening 323 penetrating the second plate-shaped valve body part 321. The first ring-shaped valve body part 312 is located outside the second ring-shaped valve body part 322 and connected with the second ring-shaped valve body part 322. The second plate-shaped valve body part 321 is oppositely spaced apart from the first plate-shaped valve body part 311 in the first direction X to form an intermediate cavity 30 therebetween. The second plate-shaped valve body part 321 is located at the side of the first plate-shaped valve body part 311 away from the pilot valve 1. The second valve body opening 323 is opposite to the first valve body opening 313. The first end of the overflow valve cover 4 (i.e. the first end of the main body 40 of the overflow valve cover 4) is fixed in the first valve body opening 313. The second end of the overflow valve cover 4 (i.e. the second end of the main body 40 of the overflow valve cover 4) is fixed in the second valve body opening 323. Thus, the main body 40 of the overflow valve cover 4 penetrates the first plate-shaped valve body part 311 and the second plate-shaped valve body part 321 in the first direction X. In this way, on the one hand, the assembly design of the overflow valve cover 4 can be realized, and the function of enabling the pilot valve 1 to move in the first direction X to reach the balanced state in cooperation with the slide rod 5, the pilot valve 1, and the electromagnetic driving part 300 can be realized. On the other hand, the overflow valve port (to be described below) can be formed by adjusting the pressure in the intermediate cavity 30 between the second plate-shaped valve body part 321 and the first plate-shaped valve body part 311, so that the fluid entering the electromagnetic valve starts to overflow through the overflow valve port, thereby stabilizing the pressure. In the stable state, the upper part of the pilot valve 1 is communicated to the fluid passage of the intermediate cavity 30, and only pressure exists, without flow.

[0065] For example, with reference to Figure 1 and Figure 2The main relief valve portion 100 further comprises a relief valve seat 6 located on the side of the relief valve body 3 away from the pilot valve 1 in the first direction X, and comprising the inlet port H1, the outlet port H2 and a partition 61 between the inlet port H1 and the outlet port H2. For example, the inlet port H1 and the outlet port H2 can each be an annular opening around the first direction X, of course, in other embodiments, the inlet port H1 and the outlet port H2 are not limited to be closed annular openings, but can also be open annular openings. The relief valve body 3 is configured to be movable in the first direction X, so that the second annular valve body portion 322 and the partition 61 form a relief valve port H3 therebetween. That is, the relief valve body 3 is moved away from the relief valve seat 6 in the first direction X under the pressure in the cavity C1 below it (on the side close to the relief valve seat 6) and the pressure in the intermediate cavity 30, thereby separating from the relief valve seat 3, and forming the relief valve port H3 therebetween. The cavity C1 is a cavity formed between the relief valve body 3 and the relief valve seat 6 by the two being engaged, and the cavity C1 is in communication with the inlet port H1. Due to the formation of the relief valve port H3, the fluid in the cavity C1 can flow out of the cavity C1 via the relief valve port H3, thereby stabilizing the pressure in the electromagnetic valve. For example, the fluid flowing out of the relief valve port H3 is further discharged out of the electromagnetic valve via the outlet port H2.

[0066] For example, referring to Figure 1 , the pilot valve 1 further comprises a first communication hole VH1 extending through the upper wall S13 of the pilot valve 1 in the first direction X. The fluid in the internal cavity of the pilot valve 1 can flow out through the first communication hole VH1 into the upper side of the pilot valve 1, so that the upper end of the pilot valve 1 will be subjected to a downward force exerted by the fluid above it (as described above). Referring to Figure 2 and Figure 8 , the flow dividing block 2 further comprises a second communication hole VH2 extending through the flow dividing block 2 in the first direction X. The second communication hole VH2 is in communication with the first communication hole VH1, and the pilot valve 1 and the flow dividing block 2 are configured to allow fluid to enter the second communication hole VH2 via the first communication hole VH1. Referring to Figure 2 , the first valve body portion 31 further comprises a third communication hole VH3 extending through the first plate-shaped valve body portion 311 in the first direction X, the second communication hole VH2 is in communication with the third communication hole VH3, and the third communication hole VH3 is in communication with the intermediate cavity 30. Under a given working current, the pilot valve 1 is in force balance, the pilot valve 1 moves to the balance position, the fluid in the internal cavity of the pilot valve 1 is communicated to the third communication hole VH3 through the second communication hole VH2 on the flow dividing block 2, thereby reaching the intermediate cavity 30, this fluid path is referred to as path 1, path 1 is formed by Figure 1 and Figure 2The dashed arrow in the figure indicates. Thus, the electromagnetic valve can achieve pressure balance and flow adjustment in the internal cavity of the pilot valve 1 under different working currents, and due to the existence of the path 1, the steady state and dynamic adjustment of the pilot valve 1 is more rapid. And the above-mentioned overflow valve port H3 can be generated, overflow is generated, and the pressure inside the electromagnetic valve is adjusted.

[0067] For example, referring to Figure 12 , the second plate-shaped valve body part 321 has an upper surface 321a close to the first plate-shaped valve body part 311 in the first direction X and a lower surface 321b away from the first plate-shaped valve body part 311 in the first direction X, the second valve body opening 323 penetrates the upper surface 321a and the lower surface 321b of the second plate-shaped valve body part 321, and the area of the lower surface 321b of the second plate-shaped valve body part 321 is smaller than the area of the upper surface 321a of the second plate-shaped valve body part 321.

[0068] Figure 8 is a schematic diagram of the structure of the flow dividing block of the electromagnetic valve shown in Figures 1-2 , is a cross-sectional view along the B-B line in Figure 9 , shows the pilot valve in Figure 8 , Figure 9 is a cross-sectional view along the C-C line in Figure 10 , shows the pilot valve in Figure 8 , Figure 10 is a schematic diagram of the structure of the flow dividing block of the electromagnetic valve shown in Figure 11 Figures 1-2 , for example, the flow dividing passage 21 further includes a longitudinal flow dividing passage 212 and a flow dividing hole VH5. The longitudinal flow dividing passage 212 extends along the first direction X, penetrates the upper surface S22 of the flow dividing block 2, and communicates with the transverse flow dividing passage 211. The flow dividing hole VH5 penetrates the flow dividing block 2 along the first direction X, is arranged in a direction around the pilot valve 1 with the longitudinal flow dividing passage 212, and is configured to allow fluid from the longitudinal flow dividing passage 212 to enter the flow dividing hole VH5. Referring to Figure 2 and Figures 8-11 , for example, the flow dividing passage 21 further includes a longitudinal flow dividing passage 212 and a flow dividing hole VH5. The longitudinal flow dividing passage 212 extends along the first direction X, penetrates the upper surface S22 of the flow dividing block 2, and communicates with the transverse flow dividing passage 211. The flow dividing hole VH5 penetrates the flow dividing block 2 along the first direction X, is arranged in a direction around the pilot valve 1 with the longitudinal flow dividing passage 212, and is configured to allow fluid from the longitudinal flow dividing passage 212 to enter the flow dividing hole VH5. Referring to Figure 2 ​The electromagnetic valve further comprises a first housing 101 and a fourth communication hole VH4 between the first housing 101 and the first annular valve body part 312, the shunt hole VH5 is in communication with the fourth communication hole VH4, and the fourth communication hole VH4 is in communication with the liquid outlet H2. Thus, a fluid path 2 is formed, in which the fluid in the pilot valve 1 internal cavity enters the shunt hole VH5 via the pilot valve port 11, the transverse shunt passage 211, and the longitudinal shunt passage 212 in sequence, and then enters the fourth communication hole VH4 and the liquid outlet H2 from the shunt hole VH5 in sequence, and is discharged from the electromagnetic valve via the liquid outlet H2. For example, the path 2 serves as an oil return passage of the electromagnetic valve, can increase the adjustment path of the fluid to which the adjustable damping is applied, and can greatly improve the adjustment ability of the damper using the electromagnetic valve to the damping of the fluid. Since the above-mentioned path 1 and path 2 are provided in the electromagnetic valve provided in the embodiment of the present disclosure, under a given current value, the pilot valve 1 is adjusted to an equilibrium state, in which process the pilot valve 1 moves to change the size of the pilot valve port 11, thereby adjusting the flow of the oil return passage by changing the size of the pilot valve port 11, and by adjusting the current value, the pilot valve 1 can be adjusted to different equilibrium states, thereby realizing continuous adjustment of the damping.

[0069] For example, in combination with Figures 1-2 and Figure 11 , the first communication hole VH1 and the shunt hole VH5 are isolated from each other, and the pilot valve 1 and the shunt block 2 are configured to not allow the fluid to enter the shunt passage 21 of the shunt block 2 and the shunt hole VH5 via the first communication hole VH1. For example, as shown in Figure 11 , the shunt block 2 has a boss 22, which protrudes from a plane (i.e. the upper surface S14 of the pilot valve 1) in which one end of the first communication hole VH1 is located, a plane S222 in which one end of the second communication hole VH2 is located, and a plane S221 in which one end of the shunt hole VH5 away from the main overflow valve part 100 in the first direction X. Referring to Figure 11 , the plane S221 is a first part of the upper surface S22 of the shunt block 2, and the shunt hole VH5 is formed on the plane S221; the plane S222 is a second part of the upper surface S22 of the shunt block 2, and the second communication hole VH2 is formed on the plane S222. The first part S221 of the upper surface S22 of the shunt block 2 is separated from the second part S222 of the upper surface S22 of the shunt block 2 by the boss 22. For example, the first part S221 of the upper surface S22 of the shunt block 2 is annular around the boss 22. For example, the boss 22 separates the first communication hole VH1 and the second communication hole VH2 from the shunt hole VH5 and the longitudinal shunt passage 212 of the shunt block 2, respectively, the first communication hole VH1 and the second communication hole VH2 are located on the inner side of the boss 22, the shunt hole VH5 of the shunt block 2 is located on the outer side of the boss 22, and the boss 22 is configured to prevent the liquid from flowing between the inner side and the outer side of the boss 22. The first communication hole VH1 is located in the pilot valve 1, so the first communication hole VH1 is locatedFigure 11 in the hollowed-out region in the middle, Figure 11 The inner side of the boss 22 is the side of the boss 22 close to the hollowed-out region (i.e., the region where the pilot valve 1 is arranged) of the boss 22.

[0070] For example, in combination with Figure 5 and Figure 11 , the height of the boss 22 in the first direction X is higher than the height of the first portion S221 of the upper surface S22 of the distribution block 2 in which the distribution hole VH5 is opened in the first direction X, higher than the height of the second portion S222 of the upper surface S22 of the distribution block 2 in which the second communication hole VH2 is opened in the first direction X, and higher than the height of the upper surface S14 of the upper wall S13 of the pilot valve 1 in which the first communication hole VH1 is opened. In this way, the above-mentioned paths 1 and 2 can be respectively realized, and the fluid is prevented from entering the distribution passage 21 and the distribution hole VH5 of the distribution block 2 via the first communication hole VH1.

[0071] For example, in combination with Figure 2 , Figure 9 and Figure 11 , the distribution hole VH5 comprises a first sub-portion VH51 and a second sub-portion VH52, which are communicated and partially staggered in the first direction X; in the first direction X, the second sub-portion VH52 is located on the side of the first sub-portion VH51 close to the main overflow valve portion 100, and on the outer side of the first sub-portion VH51. The outer side of the first sub-portion VH51 refers to the side of the first sub-portion V21 close to the second shell 201. The distribution hole VH5 is designed to comprise two sections of flow channels communicated and staggered with each other, which is conducive to ensuring the smoothness of the flow channels, and facilitates the second sub-portion VH52 to be closer to the second shell 201 so as to be communicated with the fourth communication hole VH4 close to the first shell 101.

[0072] For example, in combination with Figure 8 , the distribution block 2 is in the shape of a circular ring, and the angle θ1 between the line connecting the center of the one end of the longitudinal distribution passage 212 and the center of the circular ring and the line connecting the center of the distribution hole VH5 and the center of the circular ring is 90°, which is conducive to realizing a symmetrical design, facilitating manufacturing, and stable operation of the structure.

[0073] For example, in combination with Figure 8 , the angle θ2 between the line connecting the center of the second communication hole VH2 of the distribution block 2 and the center of the circular ring and the line connecting the center of the one end of the longitudinal distribution passage 212 and the center of the circular ring is 90°, which is conducive to realizing a symmetrical design, facilitating manufacturing, and stable operation of the structure.

[0074] For example, in combination with Figure 1 , Figures 4-7The pilot valve 1 includes a first end face S11 in the second direction Y and a second end face S16 opposite to the first end face S11, the second direction being perpendicular to the first direction X. A through hole V1 penetrates the first end face S11 and the second end face S16 of the pilot valve 1 along the second direction. For example, the pilot valve 1 may be generally columnar, with its side surface being a curved surface surrounding the first direction X. The first end face S11 and the second end face S16 are part of the side surface of the pilot valve 1; that is, the first end face S11 and the second end face S16 are two parts of a curved surface that is integrally formed around the first direction X and opposite each other in the second direction Y. (Reference) Figure 10 The lateral diversion channel 211 includes a first lateral diversion channel 211a and a second lateral diversion channel 211b respectively corresponding to the first end of the through hole V1 in the second direction and the second end of the through hole V1 in the second direction. The first lateral diversion channel 211a penetrates the inner surface of the diversion block 2 opposite to the first end face S11 of the pilot valve 1. The portion of the first end of the through hole V1 exposed by the first lateral diversion channel 211a and communicating with the first lateral diversion channel 211a constitutes the first pilot valve port 11. The second lateral diversion channel 211b penetrates the inner surface of the diversion block 2 opposite to the first end face S12 of the second end face of the pilot valve 1. The portion of the second end of the through hole V1 exposed by the second lateral diversion channel 211b and communicating with the second lateral diversion channel 211b constitutes the second pilot valve port 11. The pilot valve 1 is configured to be movable in the first direction X to change the size of the first pilot valve port 11 and the size of the second pilot valve port 11.

[0075] For example, in Figure 1 and Figure 2 In the embodiment shown, the transverse diversion channel 211 is a closed annular groove surrounding the pilot valve 1, and the first transverse diversion channel 211a and the second transverse diversion channel 211b are connected to each other to form a closed, integral annular groove.

[0076] Alternatively, in other embodiments, the first transverse diversion channel 211a and the second transverse diversion channel 211b can be spaced apart from each other and are respectively unclosed arc-shaped grooves surrounding the pilot valve 1. This design can also enable the solenoid valve to achieve the above-mentioned functions.

[0077] For example, in the solenoid valve provided in at least one embodiment of this disclosure, a safety protection is also provided when the solenoid valve fails, so that in the event of power failure of the solenoid valve or failure of the actuator, a power failure safety mode is realized, forming a power failure protection to ensure basic driving and operation safety.

[0078] Figure 13 yes Figures 1-2 The diagram shown is a structural schematic of the fail-safe structure for the solenoid valve. Figure 14 It is along Figure 13 A schematic diagram of the cross-section of the DD line in the diagram.Figure 15 is along Figure 13 the E-E line in FIG. 8. Referring to Figure 1 , Figure 2 and Figures 13-15 , for example, the electromagnetic valve further comprises a safety sheet 7, a flow relief spring 8 and a safety washer 9 (as shown in Figure 1 and Figure 2 ). The safety sheet 7 is located on the upper surface of the flow distribution block 2, covering the longitudinal flow distribution channel 212, and has a plurality of small holes corresponding to the longitudinal flow distribution channel 212. The flow relief spring 8 is located above the safety sheet 7 and can be elastically deformed. The safety washer 9 is located above the flow relief spring 8, and the flow relief spring 8 is located between the safety washer 9 and the safety sheet 7. The safety washer 9 is configured to not generate a magnetic force on the flow relief spring 8 and the safety sheet 7 when the electromagnetic valve is in an unpowered state, so that the safety sheet 7 is adhered to the upper surface of the flow distribution block 2 under the pressure of the fluid above it, and the fluid of the pilot valve 1 flows out of the electromagnetic valve through the plurality of small holes of the safety sheet 7 after passing through the longitudinal flow distribution channel 212. At this time, the fluid flowing out of the pilot valve 1 through the longitudinal flow distribution channel 212 exists above the safety sheet 7, i.e. in the space between the safety sheet 7 and the flow relief spring 8, and this part of the fluid will generate a downward pressure on the safety sheet 7, which will press the safety sheet 7 tightly against the upper surface of the flow distribution block 2. The safety sheet 7 is adhered to the upper surface of the flow distribution block 2 below it to form a seal, and the fluid (such as oil) flowing out of the pilot valve 1 can only enter the oil return channel through the small holes on the safety sheet 7, i.e. can only flow out of the longitudinal flow distribution channel 212 and enter the flow distribution hole VH5 through the small holes on the safety sheet 7, and perform oil return. In this case, the liquid flows out of the pilot valve 1 through the plurality of small holes of the safety sheet 7, and the flow rate is greatly reduced, generating back pressure of the pilot valve 1, so that the set pressure of the entire electromagnetic valve is higher than that when the minimum current is applied, thereby realizing the power-off safety mode. By adjusting the diameter of the small holes, different safety mode pressures can be achieved. That is, in the power-off state of the electromagnetic valve, the pressure can still be adjusted by the flow rate through the plurality of small holes of the safety sheet 7, but this flow rate is smaller than that in the normal working state, so as not to cause the electromagnetic valve to completely fail, thereby realizing power-off protection and ensuring basic driving and steering safety in the case of power-off or driver failure of the electromagnetic valve. In the power-off state of the electromagnetic valve, the pressure difference between the inlet H1 and the outlet H2 of the electromagnetic valve at a given flow rate is independent of the current. Thus, the electromagnetic valve can effectively realize safety protection in the event of failure.

[0079] For example, each of the small holes has a size (hole diameter) of about 0.2 mm, for example, 0.1 mm to 0.3 mm. The size of each of the small holes is not limited, and can be designed by those skilled in the art according to different flow rates and pressure settings. For example, the small holes can be round holes or square holes, for ease of manufacture and design calculation. Alternatively, the small holes can also be other regular patterns or irregular patterns, and the shape of the small holes is not limited in the embodiments of the present disclosure.

[0080] Furthermore, with reference to Figure 1 、 Figure 14 and Figure 15 , the safety washer 9 is further configured to, when the electromagnetic valve is in the energized state, generate a magnetic force on the overflow spring 8 and the safety sheet 7 to cause the overflow spring 8 and the safety sheet 7 to be attracted to the lower surface of the safety washer 9, thereby forming a gap between the safety sheet 7 and the flow distribution block 2. At this time, the fluid flowing out of the pilot valve 1 can not pass through the small holes on the safety sheet 7 to enter the oil return passage, but normally enters the oil return passage through the gap, realizing the working in the normal mode. The electromagnetic driving part 300 includes an armature support 320, the armature 340 is located on the side of the armature support 320 away from the pilot valve 1, and the armature shaft 330 passes through the armature support 320 in the first direction X. For example, the inner edge of the safety washer 9 is connected with the armature support 320, and the two are tightly fitted to generate a magnetic force on the overflow spring 8 and the safety sheet 7 when the electromagnetic valve is in the energized state, which overcomes the elastic force of the overflow spring 8 and causes the overflow spring 8 and the safety sheet 7 to be attracted to the lower surface of the safety washer 9. For example, the outer edge of the safety washer 9 is connected with the second housing 201, and the two are tightly fitted.

[0081] For example, the overflow spring 8 and the safety sheet 7 are respectively annular around the pilot valve 1 and the boss 22, and the shapes of the outer contours of the two are basically consistent, for example, are non-closed annular, for example, are the same as the shape of the part of the upper surface of the flow distribution block 2 around the boss 22, are arranged corresponding to the part of the upper surface of the flow distribution block 2 around the boss 22, to form the safety sheet 7 of the longitudinal flow distribution passage 21 with one integral structure, and the overflow spring 8 is arranged corresponding to the safety sheet 7, also as one integral structure, reducing the number of parts, and being conducive to the stability of the structure formed after the installation of the overflow spring 8, the safety sheet 7 and the flow distribution block 2. Thus, the gap formed between the safety sheet 7 and the flow distribution block 2 in the energized state of the electromagnetic valve is also annular.

[0082] For example, there is a gap between the safety washer 9 and the upper surface S22 of the flow distribution block 2, in which the overflow spring 8 and the safety sheet 7 are arranged. For example, the height of the gap in the first direction X is about 0.2 mm, for example, 0.1 mm to 0.3 mm. Of course, the specific range of the gap is not limited, and the above-mentioned examples are to express that the size of the gap is about the above-mentioned magnitude.

[0083] For example, the safety washer 9 is arranged around the boss 22 and seals the space outside the boss 22. Here, "sealing the space outside the boss 22" means isolating the space outside the boss 22 from the space inside the boss 22 to prevent fluid outside the boss 22 from entering the space inside the boss 22. This prevents fluid in the diversion hole VH5 and the longitudinal diversion channel 212 located outside the boss 22 from entering the first connecting hole VH1 and the second connecting hole VH2 located inside the boss 22, thereby realizing the above-mentioned path 1 and path 2.

[0084] For example, the safety washer 9 is annular around the boss 22. For example, the orthographic projection of the safety washer 9 on the upper surface S22 of the diverter block 2 lies within the orthographic projection of the flow spring 8 on the upper surface S22 of the diverter block 2. Figure 1 As shown, the radial width of the safety washer 9 is less than the radial width of the first portion S221 of the upper surface S22 of the diverter block 2. The armature support 320 contacts the upper surface of the boss 22, and the safety washer 9 and the armature support 320 together seal the space outside the boss 22. For example, in other embodiments, the radial width of the safety washer 9 may be equal to the radial width of the first portion S221 of the upper surface S22 of the diverter block 2, and the safety washer 9 may be tightly connected to the stepped portion of the boss 22 to seal the space outside the boss 22.

[0085] At least one embodiment of this disclosure also provides a shock absorber, which can be a shock absorber for mechanical equipment, such as a shock absorber for a vehicle. Figure 16 This is a schematic diagram of a vibration damper provided in one embodiment of the present disclosure.

[0086] like Figure 16 As shown, the shock absorber 500 includes any of the solenoid valves 400 provided in the embodiments of this disclosure. Therefore, the shock absorber 500 can achieve continuously adjustable damping under the drive of the operating current, and can also maintain safety in the event of power failure or actuator failure, thereby ensuring basic driving and handling safety. The shock absorber provided in the embodiments of this disclosure employs a novel solenoid valve design applicable to shock absorbers to effectively regulate the pressure of the fluid entering the solenoid valve during the operation of the shock absorber. The shock absorber provided in the embodiments of this disclosure possesses all the technical effects of the solenoid valves provided in the embodiments of this disclosure, which will not be repeated here.

[0087] The following points also need to be explained:

[0088] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0089] (2) For clarity, the thickness of layers or regions in the drawings used to describe embodiments of the present disclosure is exaggerated or reduced, i.e., the drawings are not drawn to scale.

[0090] (3) Embodiments of the present disclosure and features in the embodiments can be combined with each other to obtain new embodiments, without conflict.

[0091] The above description is merely illustrative of the 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. A solenoid valve, comprising: A pilot valve section, wherein the pilot valve section includes a pilot valve and a flow divider block, the flow divider block surrounding the pilot valve in a manner surrounding a first direction; The pilot valve includes a through hole that penetrates the first end face of the pilot valve facing the diverter block; The diversion block includes a diversion channel, the diversion channel includes a transverse diversion channel, the transverse diversion channel penetrates the inner surface of the diversion block opposite to the first end face of the pilot valve, and the portion of the through hole exposed by the transverse diversion channel and communicating with the transverse diversion channel constitutes the pilot valve port; The pilot valve is configured to be movable in the first direction to change the size of the pilot valve orifice; The solenoid valve also includes: The main relief valve section is located on the first side of the pilot valve in the first direction and includes a relief valve body, wherein, The pilot valve has a lower wall near the overflow valve body in the first direction and a pilot valve inlet penetrating the lower wall in the first direction, the pilot valve inlet communicating with the through hole; There is a first gap between the surface of the overflow valve body near the pilot valve in the first direction and the lower wall of the pilot valve, the first gap communicating with the inlet of the pilot valve, and the surface of the overflow valve body near the pilot valve in the first direction and the surface of the diverter block near the overflow valve body in the first direction are configured to prevent fluid from entering between the two.

2. The solenoid valve according to claim 1, wherein, The surface of the overflow valve body near the pilot valve in the first direction is in contact with the surface of the diverter block near the overflow valve body in the first direction.

3. The solenoid valve according to claim 1, wherein, A groove is formed on the outer surface of the lower wall of the pilot valve, and the groove forms the first gap between the first groove and the surface of the overflow valve body near the pilot valve in the first direction.

4. The solenoid valve according to claim 1, wherein, The main overflow valve section also includes: Liquid inlet; An overflow valve cover includes a body and a through hole penetrating the body along a first direction, wherein the overflow valve cover body passes through the overflow valve body along the first direction, a first end of the through hole communicates with the liquid inlet, and a second end of the through hole communicates with the pilot valve inlet; and A slide rod extends along the first direction, passes through the through hole and the pilot valve inlet, and enters the pilot valve. The pilot valve also includes an upper wall opposite to the lower wall in the first direction. The first end of the slide rod is located in the through hole and has a second gap between it and the hole wall. The second end of the slide rod is connected to the upper wall of the pilot valve.

5. The solenoid valve according to claim 4, wherein, The through hole includes a first sub-section that penetrates the upper cover plate of the overflow valve cover near the pilot valve and a second sub-section located on the side of the first sub-section away from the pilot valve; The slide bar passes through the second sub-part and the first sub-part in sequence. The second gap includes a first sub-gap between the hole wall of the first sub-part and the slide bar and a second sub-gap between the hole wall of the second sub-part and the slide bar. The hole diameter of the first sub-part is smaller than the hole diameter of the second sub-part, and the width of the first sub-gap is smaller than the width of the second sub-gap.

6. The solenoid valve according to claim 4, wherein, The overflow valve body includes: The first valve body portion includes a first plate-shaped valve body portion, a first annular valve body portion located at the edge of the first plate-shaped valve body portion, and a first valve body opening penetrating the first plate-shaped valve body portion; and The second valve body portion is fixedly connected to the first valve body portion and includes a second plate-shaped valve body portion, a second annular valve body portion located at the edge of the second plate-shaped valve body portion, and a second valve body opening penetrating the second plate-shaped valve body portion, wherein... The first annular valve body portion is located outside the second annular valve body portion and connected to the second annular valve body portion. The second plate-shaped valve body portion and the first plate-shaped valve body portion are spaced apart from each other in a first direction to form an intermediate cavity between them. The second plate-shaped valve body portion is located on the side of the first plate-shaped valve body portion away from the pilot valve. The opening of the second valve body portion is opposite to the opening of the first valve body portion. The first end of the overflow valve cover is fixed in the opening of the first valve body portion, and the second end of the overflow valve cover is fixed in the opening of the second valve body portion.

7. The solenoid valve according to claim 6, wherein, The main overflow valve section also includes: An overflow valve seat, located on the side of the overflow valve body away from the pilot valve in the first direction, includes the inlet, the outlet, and a partition between the inlet and the outlet, wherein... The overflow valve body is configured to be movable in the first direction such that an overflow valve port is formed between the second annular valve body portion and the partition portion.

8. The solenoid valve according to claim 6, wherein, The second plate-shaped valve body portion has an upper surface that is close to the first plate-shaped valve body portion in the first direction and a lower surface that is away from the first plate-shaped valve body portion in the first direction. The second valve body opening penetrates the upper surface and the lower surface of the second plate-shaped valve body portion. The area of ​​the lower surface of the second plate-shaped valve body portion is smaller than the area of ​​the upper surface of the second plate-shaped valve body portion.

9. The solenoid valve according to claim 7, wherein, The pilot valve further includes a first communicating hole penetrating the upper wall of the pilot valve along the first direction, and the flow divider block further includes a second communicating hole penetrating the flow divider block along the first direction; The second connecting hole communicates with the first connecting hole, and the pilot valve and the flow divider are configured to allow fluid to enter the second connecting hole via the first connecting hole; The first valve body portion further includes a third connecting hole that penetrates the first plate-shaped valve body portion along the first direction, the second connecting hole communicating with the third connecting hole, and the third connecting hole communicating with the intermediate cavity.

10. The solenoid valve according to claim 9, wherein, The diversion channel also includes: A longitudinal diversion channel extends along the first direction, penetrates the upper surface of the diversion block, and communicates with the transverse diversion channel; and A flow divider orifice extends through the flow divider block along the first direction, is spaced apart from the longitudinal flow divider channel in the direction surrounding the pilot valve, and is configured to allow fluid from the longitudinal flow divider channel to enter the flow divider orifice; The solenoid valve further includes a first housing and a fourth connecting hole located between the first housing and the first annular valve body portion. The flow divider hole communicates with the fourth connecting hole, and the fourth connecting hole communicates with the liquid outlet.

11. The solenoid valve according to claim 10, wherein, The first connecting hole and the diverting hole are isolated from each other, and the pilot valve and the diverting block are configured to prevent the fluid from entering the diverting channel and the diverting hole of the diverting block via the first connecting hole.

12. The solenoid valve according to claim 11, wherein, The diverter block has a boss that protrudes in the first direction from the plane containing one end of the first connecting hole, the second connecting hole, and the diverter hole that is away from the main overflow valve in the first direction. The boss separates the first connecting hole and the second connecting hole from the diversion hole of the diversion block, respectively. The first connecting hole and the second connecting hole are located inside the boss, and the diversion hole of the diversion block is located outside the boss. The boss is configured to prevent liquid from flowing between the inside and outside of the boss.

13. The solenoid valve according to claim 12, wherein, The solenoid valve also includes: A safety plate is located on the upper surface of the diversion block, away from the main overflow valve, covering the longitudinal diversion channel, and having a plurality of small holes corresponding to the longitudinal diversion channel; A flow spring is located above the safety sheet and is capable of elastic deformation; A safety washer is located above the flow spring, wherein the flow spring is located between the safety washer and the safety piece. The safety washer is configured such that, when the solenoid valve is de-energized, it does not exert a magnetic force on the flow spring and the safety plate. Therefore, the safety plate adheres to the upper surface of the flow divider block under the pressure of the fluid above it. The fluid from the pilot valve flows out of the solenoid valve through the longitudinal flow divider channel and then through multiple small holes in the safety plate. When the solenoid valve is energized, it exerts a magnetic force on the flow spring and the safety plate, causing them to be attracted to the lower surface of the safety washer, thereby forming a gap between the safety plate and the diverter block.

14. The solenoid valve according to claim 12, wherein, The diversion orifice includes a first sub-section and a second sub-section, the first sub-section and the second sub-section being connected and partially offset in the first direction; In the first direction, the second sub-part is located on the side of the first sub-part closer to the main overflow valve part, and is located outside the first sub-part.

15. The solenoid valve according to claim 12, wherein, The diversion block is annular in shape, and the angle between the line connecting the center of the end of the diversion channel and the diversion hole that penetrates the upper surface of the diversion block away from the main overflow valve and the center of the annulus is 90°; and / or, The angle between the line connecting the center of the second connecting hole of the diverter block and the center of the annulus and the line connecting the center of the end of the longitudinal diverter channel that penetrates the upper surface of the diverter block and the center of the annulus is 90°.

16. The solenoid valve according to claim 1, wherein, The area of ​​the upper surface of the pilot valve away from the main relief valve in the first direction is smaller than the area of ​​the lower surface of the pilot valve close to the main relief valve in the first direction.

17. The solenoid valve according to claim 1, wherein, The solenoid valve also includes: An electromagnetic drive unit is located on the second side of the pilot valve unit in the first direction, wherein the second side of the pilot valve unit is opposite to the first side of the pilot valve unit. The electromagnetic drive unit includes an armature shaft configured to apply a force toward the main relief valve to the pilot valve under the condition that a given current is applied to the electromagnetic drive unit.

18. The solenoid valve according to claim 1, wherein, The pilot valve includes a first end face in a second direction and a second end face opposite to the first end face, wherein the second direction is perpendicular to the first direction; The through hole penetrates the first end face and the second end face of the pilot valve along the second direction; The lateral diversion channel includes a first lateral diversion channel and a second lateral diversion channel respectively provided corresponding to the first end of the through hole in the second direction and the second end of the through hole in the second direction; The first transverse diversion channel penetrates the inner surface of the diversion block opposite to the first end face of the pilot valve, and the portion of the first end of the through hole exposed by the first transverse diversion channel and connected to the first transverse diversion channel constitutes the first pilot valve port. The second transverse diversion channel penetrates the inner surface of the diversion block opposite to the second end face of the pilot valve, and the portion of the second end of the through hole exposed by the second transverse diversion channel and connected to the second transverse diversion channel constitutes the second pilot valve port; The pilot valve is configured to be movable in a first direction to change the size of the first pilot valve port and the size of the second pilot valve port.

19. The solenoid valve according to claim 18, wherein, The lateral diversion channel is a closed annular groove surrounding the pilot valve, and the first lateral diversion channel and the second lateral diversion channel are connected to each other to form the closed annular groove. or, The first transverse diversion channel and the second transverse diversion channel are spaced apart from each other and are respectively unclosed arc-shaped grooves surrounding the pilot valve.

20. A vibration damper comprising a solenoid valve according to any one of claims 1-19.

Images