Solenoid valve and shock absorber

Abstract

A solenoid valve and a shock absorber, the solenoid valve including a pilot valve portion including a pilot valve and a shunt block. The shunting block surrounds the pilot valve in a mode of surrounding the first direction; the pilot valve comprises a through hole, and the through hole penetrates through the first end face, facing the flow dividing block, of the pilot valve. The flow dividing block comprises a flow dividing channel, the flow dividing channel comprises a transverse flow dividing channel, the transverse flow dividing channel penetrates through the inner surface, opposite to the first end face of the pilot valve, of the flow dividing block, and the part, exposed by the transverse flow dividing channel and communicated with the transverse flow dividing channel, of the through hole forms a pilot valve port; the pilot valve is configured to be movable in a first direction to vary the size of the pilot valve port. The electromagnetic valve can be used for a shock absorber, and the shock absorber can be used for any equipment such as running vehicles needing shock absorption. According to the electromagnetic valve, the size of the pilot valve port can be adjusted by adjusting the working current of the electromagnetic valve, so that the pressure in the pilot valve in a balanced state is adjusted, and the pressure of fluid entering the electromagnetic valve is adjusted.

Description

Technical Field

[0001] At least one embodiment of the present disclosure relates to a solenoid valve and a shock absorber. Background Art

[0002] In the automobile suspension system, since the spring itself will reciprocate when filtering road vibration, in order to improve the smoothness of the car's driving, a shock absorber is usually installed in the suspension system to suppress the oscillation when the spring rebounds after absorbing the vibration. Therefore, the shock absorber can reduce the vibration of the frame and body to improve the smoothness of the car's driving.

[0003] With the rapid development of the automobile industry and the continuous improvement of people's living standards, people have higher and higher requirements for the ride comfort of automobiles. Shock absorbers with a single damping value can no longer meet people's needs, and shock absorbers with adjustable damping values ​​have emerged. Summary of the invention

[0004] At least one embodiment of the present disclosure provides a solenoid valve, which includes a pilot valve portion, wherein the pilot valve portion includes a pilot valve and a diverter block. The diverter block surrounds the pilot valve in a manner of surrounding a first direction; the pilot valve includes a through hole, which penetrates the first end face of the pilot valve facing the diverter block; the diverter block includes a diverter channel, which includes a transverse diverter channel, which penetrates the inner surface of the diverter block opposite to the first end face of the pilot valve, and the portion of the through hole exposed by the transverse diverter channel and connected to the transverse diverter channel 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.

[0005] For example, the solenoid valve provided in one embodiment of the present disclosure also includes a main overflow valve portion, which is located on the first side of the pilot valve in the first direction and includes 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 along the first direction, and the pilot valve inlet is connected to the through hole; there is a first gap between the 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 is connected to the pilot valve inlet, and the surface of the overflow valve body close to the pilot valve in the first direction is in contact with the surface of the diverter block close to the overflow valve body in the first direction.

[0006] For example, in the solenoid valve provided in one embodiment of the present disclosure, a groove is provided 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, in the solenoid valve provided in one embodiment of the present disclosure, the main overflow valve part also includes: a liquid inlet, an overflow valve cover and a sliding rod. The overflow valve cover includes a main body and a through hole penetrating the main body along the first direction, the overflow valve cover main body passes through the overflow valve body along the first direction, the first end of the through hole is connected to the liquid inlet, and the second end of the through hole is connected to the pilot valve inlet; the sliding rod extends along the first direction, passes through the through hole and the pilot valve inlet and enters the pilot valve, wherein the pilot valve also includes an upper wall opposite to the lower wall in the first direction, the first end of the sliding rod is located in the through hole and has a second gap with the hole wall of the through hole, and the second end of the sliding rod is connected to the upper wall of the pilot valve.

[0008] For example, in the solenoid valve provided in one embodiment of the present disclosure, the through hole includes a first sub-portion that passes through the overflow valve cover and is close to the upper cover plate of the pilot valve, and a second sub-portion that is located on the side of the first sub-portion away from the pilot valve; the sliding rod passes through the second sub-portion and the first sub-portion in sequence, and the second gap includes a first sub-gap between the hole wall of the first sub-portion and the sliding rod and a second sub-gap between the hole wall of the second sub-portion and the sliding rod, the aperture of the first sub-portion is smaller than the aperture of the second sub-portion, and the width of the first sub-gap is smaller than the width of the second sub-gap.

[0009] For example, in a solenoid valve provided in an embodiment of the present disclosure, the relief valve body includes: a first valve body portion and a second valve body portion. 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; 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; the first annular valve body portion is located outside the second annular valve body portion and connected to the second annular valve body portion, and the second plate-shaped valve body portion and the first plate-shaped valve body portion are arranged relative to each other in the first direction to form an intermediate cavity therebetween, the second plate-shaped valve body portion is located on a side of the first plate-shaped valve body portion away from the pilot valve, the second valve body opening is opposite to the first valve body opening, the first end of the relief valve cover is fixed in the first valve body opening, and the second end of the relief valve cover is fixed in the second valve body opening.

[0010] For example, in the solenoid valve provided in one embodiment of the present disclosure, the main overflow valve portion also includes an overflow valve seat, which is located on the side of the overflow valve body away from the pilot valve in the first direction, and includes the liquid inlet, the liquid outlet and a partition located between the liquid inlet and the liquid outlet; the overflow valve body is configured to be movable in the first direction so that an overflow valve port is formed between the second annular valve body portion and the partition.

[0011] For example, in the solenoid valve provided by one embodiment of the present disclosure, the second plate-like valve body portion has an upper surface close to the first plate-like valve body portion in the first direction and a lower surface away from the first plate-like valve body portion in the first direction, the second valve body opening passes through the upper surface and the lower surface of the second plate-like valve body portion, and the area of ​​the lower surface of the second plate-like valve body portion is smaller than the area of ​​the upper surface of the second plate-like valve body portion.

[0012] For example, in the solenoid valve provided in one embodiment of the present disclosure, the pilot valve also includes a first communicating hole passing through the upper wall of the pilot valve along the first direction, and the diverter block also includes a second communicating hole passing through the diverter block along the first direction; the second communicating hole is connected to the first communicating hole, and the pilot valve and the diverter block are configured to allow fluid to enter the second communicating hole via the first communicating hole; the first valve body portion also includes a third communicating hole passing through the first plate-like valve body portion along the first direction, the second communicating hole is connected to the third communicating hole, and the third communicating hole is connected to the intermediate cavity.

[0013] For example, in the solenoid valve provided in one embodiment of the present disclosure, the diverter channel further includes: a longitudinal diverter channel and a diverter hole. The longitudinal diverter channel extends along the first direction, passes through the upper surface of the diverter block, and is connected to the transverse diverter channel; the diverter hole passes through the diverter block along the first direction, is spaced apart from the longitudinal diverter channel in the direction surrounding the pilot valve, and is configured to allow fluid from the longitudinal diverter channel to enter the diverter hole; the solenoid valve further includes a first housing and a fourth communicating hole located between the first housing and the first annular valve body portion, the diverter hole is connected to the fourth communicating hole, and the fourth communicating hole is connected to the liquid outlet.

[0014] For example, in the solenoid valve provided in one embodiment of the present disclosure, the first connecting hole and the diverter hole are isolated from each other, and the pilot valve and the diverter block are configured not to allow the fluid to enter the diverter channel and the diverter hole of the diverter block through the first connecting hole.

[0015] For example, in the solenoid valve provided in one embodiment of the present disclosure, the diverter block has a boss, which protrudes in the first direction from the plane where the first connecting hole, the second connecting hole and the diverter hole are each located at one end away from the main overflow valve part in the first direction, and the boss separates the first connecting hole and the second connecting hole from the diverter hole of the diverter block respectively, the first connecting hole and the second connecting hole are located on the inner side of the boss, and the diverter hole of the diverter block is located on the outer side of the boss, and the boss is configured to prevent liquid from flowing between the inner and outer sides of the boss.

[0016] For example, in the solenoid valve provided in an embodiment of the present disclosure, the solenoid valve further includes a safety plate, a current-passing spring plate and a safety gasket. The safety sheet is located on the side of the upper surface of the diverter block away from the main overflow valve part, covers the longitudinal diverter channel, and has a plurality of small holes corresponding to the longitudinal diverter channel; the overflow spring sheet is located above the safety sheet and can produce elastic deformation; the safety gasket is located above the overflow spring sheet, and the overflow spring sheet is located between the safety gasket and the safety sheet, and the safety gasket is configured as follows: when the solenoid valve is in an unpowered state, no magnetic force is generated on the overflow spring sheet and the safety sheet, so that the safety sheet adheres to the upper surface of the diverter block under the pressure exerted by the fluid above it, and the fluid of the pilot valve flows out of the solenoid valve through the plurality of small holes of the safety sheet after passing through the longitudinal diverter channel, and when the solenoid valve is in an energized state, a magnetic force is generated on the overflow spring sheet and the safety sheet so that the overflow spring sheet and the safety sheet are adsorbed onto the lower surface of the safety gasket, thereby forming a gap between the safety sheet and the diverter block.

[0017] For example, in the solenoid valve provided in one embodiment of the present disclosure, the diversion hole includes a first sub-portion and a second sub-portion, the first sub-portion and the second sub-portion are connected and partially staggered in the first direction; in the first direction, the second sub-portion is located on the side of the first sub-portion close to the main overflow valve portion, and is located on the outside of the first sub-portion.

[0018] For example, in the solenoid valve provided in one embodiment of the present disclosure, the diverter block is in the shape of a ring, and the angle between the line connecting the center of one end of the longitudinal diverter channel and the diverter hole that each passes through the upper surface of the diverter block away from the main overflow valve part and the center of the ring 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 ring and the line connecting the center of one end of the longitudinal diverter channel that passes through the upper surface of the diverter block and the center of the ring is 90°.

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

[0020] For example, in the solenoid valve provided in one embodiment of the present disclosure, the solenoid valve also includes an electromagnetic drive unit, which is located on the second side of the pilot valve unit in the first direction, and 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, and the armature shaft is configured to apply a force toward the main overflow valve unit to the pilot valve under the condition of applying a given current to the electromagnetic drive unit.

[0021] For example, in a solenoid valve provided in an embodiment of the present disclosure, the pilot valve includes the first end face in a second direction and the second end face opposite to the first end face, and 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 arranged 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 lateral 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 lateral diversion channel and connected to the first lateral diversion channel constitutes a first pilot valve port; the second lateral 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 lateral diversion channel and connected to the second lateral diversion channel 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 solenoid valve provided in one embodiment of the present disclosure, 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 lateral diversion channel and the second lateral diversion channel are spaced apart from each other and are respectively unclosed arc grooves surrounding the pilot valve.

[0023] At least one embodiment of the present disclosure further provides a shock absorber. The embodiment of the present disclosure further provides a shock absorber, and the shock absorber includes any one of the solenoid valves provided in the embodiment of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 invention, but are not intended to limit the present invention.

[0025] Figure 1 A first cross-sectional schematic diagram of a solenoid valve provided in one embodiment of the present disclosure;

[0026] Figure 2 A second cross-sectional schematic diagram of a solenoid valve provided in one embodiment of the present disclosure;

[0027] Figure 3 for Figure 1-Figure 2 The schematic diagram of the appearance structure of the provided solenoid valve;

[0028] Figure 4 yes Figure 1-Figure 2 A schematic diagram of the structure of the pilot valve of the solenoid valve shown;

[0029] Figure 5 is along Figure 4 Schematic diagram of the cross section of line AA in FIG.

[0030] Figure 6 is Figure 4 Schematic diagram from the B-direction perspective;

[0031] Figure 7 yes Figure 1-Figure 2 A three-dimensional structural schematic diagram of a pilot valve of a solenoid valve shown in FIG.

[0032] Figure 8 yes Figure 1-Figure 2 The structural schematic diagram of the shunt block of the solenoid valve shown;

[0033] Fig. 9 is along Figure 8 Schematic diagram of the cross section of line BB in ( Fig. 9 The pilot valve is shown in FIG);

[0034] Fig.10 is along Figure 8 Schematic diagram of the cross section of the CC line in ( Fig.10 The pilot valve is shown in FIG);

[0035] Fig.11 yes Figure 1-Figure 2 A schematic diagram of the three-dimensional structure of the diverter block of the solenoid valve shown;

[0036] Fig.12 yes Figure 1-Figure 2 The schematic diagram of the structure of the main overflow valve body of the solenoid valve shown in the figure includes an enlarged schematic diagram of a local L;

[0037] Fig.13 yes Figure 1-Figure 2 A schematic structural diagram of a failure protection structure of a solenoid valve shown;

[0038] Fig.14 is along Fig.13 Schematic diagram of the cross section of the DD line;

[0039] Fig.15 is along Fig.13 Schematic diagram of the cross section of line EE in FIG.

[0040] Fig.16 A schematic diagram of a shock absorber provided in one embodiment of the present disclosure. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the invention belongs. The words "first", "second" and similar terms used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Inside", "outside", "upper", "lower" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] The drawings in this disclosure are not drawn strictly according to the actual scale, and the number of the fourth openings in the solenoid valve is not limited to the number shown in the drawings. The specific size and number of each structure can be determined according to actual needs. The drawings described in this disclosure are only schematic diagrams of the structures.

[0044] The features such as "parallel", "perpendicular", and "identical" used in this disclosure include the features such as "parallel", "perpendicular", and "identical" in the strict sense, as well as the cases where "substantially parallel", "substantially overlapping", "substantially identical", etc. contain certain errors, taking into account the errors associated with the measurement of specific quantities (e.g., the limitations of the measurement system), and represent the acceptable deviation range for a specific value determined by ordinary technicians in this field. For example, "substantially" can mean within one or more standard deviations, and if not otherwise specified, can mean within a 10% or 5% deviation range of the value.

[0045] With the development of automobile electrification and autonomous driving technology, the weight of automobiles has increased and the dynamic performance has also improved. Therefore, the shock absorber needs to work in a wider range, and the damping characteristics of the shock absorber need to be continuously adjustable. In this regard, a solenoid valve with continuously adjustable damping can be used to achieve continuous adjustment of the damping characteristics of the shock absorber.

[0046] The solenoid valve with continuously adjustable damping used in automobile shock absorbers needs to realize two functions: one is the continuous adjustable damping, in which case the working current range of the solenoid valve is I ~ Imax, and the other is safety in case of failure, in which case the working current range of the solenoid valve is 0 ~ I. In other words, in addition to being able to realize continuous adjustable damping under the drive of the working current, the solenoid valve used in automobile shock absorbers also needs to ensure that it can remain safe in the event of power failure or driver failure, thereby ensuring basic driving and operating safety. For example, in the event of power failure or driver failure, the damping of the solenoid valve can be maintained at a central value within its adjustable range, thereby ensuring basic driving and operating safety. It should be noted that the above-mentioned I can also be called the turning current, and its value can usually be 300 ~ 450mA, and can reach 600mA in some cases.

[0047] At least one embodiment of the present disclosure provides a solenoid valve, which includes a pilot valve portion, and the pilot valve portion includes a pilot valve and a diverter block. The diverter block surrounds the pilot valve in a manner of surrounding a first direction; the pilot valve includes a through hole, and the through hole penetrates the first end face of the pilot valve facing the diverter block; the diverter block includes a diverter channel, and the diverter channel includes a transverse diverter channel, and the transverse diverter channel penetrates the inner surface of the diverter block opposite to the first end face of the pilot valve, and the part of the through hole exposed by the transverse diverter channel and connected to the transverse diverter channel 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 solenoid valve provided in the embodiment of the present disclosure can be used for a shock absorber, and the shock absorber can be used for any equipment that requires shock absorption, such as a traveling vehicle. The solenoid valve can adjust the pressure in the pilot valve in a balanced state through the pilot valve port. Furthermore, the size of the pilot valve port can be adjusted by adjusting the working current of the solenoid valve, thereby adjusting the pressure in the pilot valve in a balanced state, thereby achieving regulation of the pressure of the fluid entering the solenoid valve.

[0048] At least one embodiment of the present disclosure further provides a shock absorber. The embodiment of the present disclosure further provides a shock absorber, which includes any solenoid valve provided in the embodiment of the present disclosure. The shock absorber provided in the embodiment of the present disclosure can be used for any equipment requiring shock absorption, such as a traveling vehicle. The shock absorber adopts a new design of a solenoid valve applicable to the shock absorber, so as to effectively adjust the pressure of the fluid entering the solenoid valve during the operation of the shock absorber.

[0049] For example, Figure 1 This is a first cross-sectional schematic diagram of a solenoid valve provided in one embodiment of the present disclosure. Figure 2 A second cross-sectional schematic diagram of a solenoid valve provided in one embodiment of the present disclosure, Figure 3 for Figure 1-Figure 2 The schematic diagram of the solenoid valve is provided. Figure 1 , Figure 2 and Figure 3 The solenoid valve 400 includes a pilot valve part 200, and the pilot valve part 200 includes a pilot valve 1 and a diverter block 2. The diverter block 2 surrounds the pilot valve 1 in a manner of surrounding a first direction X; the pilot valve 1 includes a through hole V1, and the through hole V1 penetrates a first end surface S11 of the pilot valve 1 facing the diverter block 2; the diverter block 2 includes a diverter channel 21, and the diverter channel 21 includes a transverse diverter channel 211, and the transverse diverter channel 211 penetrates an inner surface S21 of the diverter block 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 by the lateral flow diversion channel 211 and in communication with the lateral flow diversion channel 211 constitutes the pilot valve port 11, that is, the portion of the opening O1 exposed by the lateral flow diversion channel 211 and in communication with the lateral flow diversion channel 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. During the movement of 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 diverter block 2 will also change, thereby changing the size of the pilot valve port 11.

[0050] In the solenoid valve design provided in the embodiment of the present disclosure, the pilot valve port 11 enables the through hole V1 of the pilot valve 1 to communicate with the shunt channel 21 of the shunt block 2, so that the fluid entering the solenoid valve 400 can flow out through the through hole V1 of the pilot valve 1, the pilot valve port 11 and the shunt channel 21, thereby forming a fluid outflow channel, and the pressure inside the pilot valve 1 can be adjusted. Under a given working current, the pilot valve 1 can move in the first direction X in the process of achieving force balance, and finally moves to the equilibrium position. The pilot valve 1 moves in the first direction X to change the size of the pilot valve port 11, thereby adjusting the pressure in the pilot valve 1 in the equilibrium state through the pilot valve port 11. In addition, the size of the pilot valve port 11 can be adjusted by adjusting the working current of the solenoid valve 400, thereby adjusting the pressure in the pilot valve 1 in the equilibrium state, thereby achieving the pressure of the fluid entering the solenoid valve 400. The solenoid valve 400 provided in the embodiment of the present disclosure can be used in a shock absorber, providing a new design of a solenoid valve applicable to a shock absorber, so as to effectively adjust the pressure of the fluid entering the solenoid valve during the operation of the shock absorber.

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

[0052] For example, refer to Figure 1 and Figure 2 The solenoid valve 400 further includes a main overflow valve portion 100, which is located on a first side of the pilot valve 1 in the first direction X and includes an overflow valve body 3. The pilot valve 1 has a lower wall S12 close to the overflow valve body 3 in the first direction X (for clarity of marking, see Figure 5 and Figure 7 ) and a pilot valve inlet OP1 penetrating the lower wall along the first direction X, the pilot valve inlet OP1 being connected to the through hole V1. Figure 1There is a first gap G1 between the surface of the relief 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 connected to the pilot valve inlet OP1. When the fluid enters the solenoid valve 400, the fluid is allowed to enter the first gap G1, so that the liquid in the first gap G1 applies a force to the pilot valve 1 away from the relief valve body 3 along the first direction X, 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 relief valve body 3 close to the pilot valve 1 in the first direction X fits with the surface of the diverter block 2 close to the relief valve body 3 in the first direction X, and the fit between the two makes there is no gap between the two, and the fluid is not allowed to enter between the two.

[0053] Figure 4 yes Figure 1-Figure 2 The schematic diagram of the structure of the pilot valve of the solenoid valve shown in FIG. Figure 5 is along Figure 4 Schematic diagram of the cross section of line AA in the figure. Figure 6 is Figure 4 Schematic diagram from the B perspective, Figure 7 yes Figure 1-Figure 2 The three-dimensional structure diagram of the pilot valve of the solenoid valve shown in FIG. Figure 1 , Figure 5 and Figure 7 A groove 12 is provided on the outer surface of the lower wall S12 of the pilot valve 1, and the first gap G1 is formed between the groove 12 and the surface of the relief valve body 3 close to the pilot valve 1 in the first direction X. The design of the groove 12 is conducive to ensuring the formation of the first gap G1 and simplifying the structure of the solenoid valve.

[0054] For example, in Figure 7 In the example shown, a plurality of grooves 12 spaced apart from each other may be provided, which is conducive to designing the size of the grooves 12 according to design requirements to meet the size requirements for the first gap G1. For example, four grooves 12 are provided, and two grooves 12 opposite to each other are axially symmetrical, and this symmetrical design is conducive to the balance of the structure during operation. Of course, in other embodiments, the number of grooves 12 may also be 1, or other numbers. The embodiment of the present disclosure does not limit the number of grooves 12, and is not limited to the number listed above.

[0055] For example, refer to Figure 1 and Figure 2 The solenoid valve further comprises an electromagnetic driving part 300, which is located at 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 toward the main relief valve part 100 to the pilot valve 1 under the condition that a given current is applied to the electromagnetic driving part 300, that is, along the Figure 1When 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, Figure 1 As shown, the electromagnetic drive unit 300 further includes a third housing 301 and an armature 340. The armature shaft 330 and the armature 340 are both located within the third housing 301, and the first end of the armature shaft 330 is connected to 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 overflow valve unit 100 to the pilot valve 1. For example, the electromagnetic drive unit 300 further includes an elastic 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 and the pilot valve 1, thereby, the armature shaft 330 transmits the electromagnetic force generated by the armature 340 to the pilot valve 1. 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 elastic 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, Figure 1 As shown, the electromagnetic drive unit 300 further includes a magnetic isolation ring 350 and an electromagnet 360. The magnetic isolation ring 350 is sleeved on the armature 340, and the electromagnet 360 is located between the magnetic isolation ring 350 and the third housing 301.

[0058] For example, refer to Figure 1 and Figure 2 , the main overflow valve part 100 further includes a liquid inlet H1, an overflow valve cover 4 and a slide rod 5. The overflow valve cover 4 includes a main body 40 and a through hole V2 penetrating the main body 40 along the first direction X. The main body 40 of the overflow valve cover 4 passes through the overflow valve body 3 along the first direction X. The first end of the through hole V2 is communicated with the liquid inlet H1, and the second end of the through hole V2 is communicated with the pilot valve inlet OP1. The slide rod 5 extends along the first direction X, passes through the through hole V2 and the pilot valve inlet OP1 and enters the pilot valve 1. The pilot valve 1 further includes an upper wall S13 opposite to the lower wall S12 in the first direction X. 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 with the hole wall of the through hole V2. The second end of the slide rod 5 in the first direction X is connected to the upper wall S13 of the pilot valve 1, for example, connected to 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. Figure 1 The lower end of the pilot valve 1 and the lower end of the pilot valve 1 are respectively subjected to an upward force exerted by the fluid (i.e., a force away from the relief valve body 3 along the first direction X, Figure 1The direction shown in the figure is upward), the upward force is applied to the pilot valve 1 by the liquid in the first gap G1, the upward force is applied to the first end of the slide rod 5 by the fluid in the through hole V2, and the upper end of the pilot valve 1 is subjected to the downward force (i.e., the force along the first direction X toward the overflow valve body 3) applied by the fluid above it (described below), Figure 1 The direction shown in the figure 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 a balanced position; on the other hand, after the fluid enters the solenoid valve 400 through the liquid inlet H1, the fluid will be decelerated when passing through the second gap G2, thereby controlling the flow of the fluid and preventing the flow entering the pilot valve from being too large.

[0059] For example, refer to Figure 4 , the area of ​​the upper surface S14 of the pilot valve 1 away from the main relief valve part 100 in the first direction X is smaller than the area of ​​the lower surface of the pilot valve 1 close to the main relief valve part 100 in the first direction X. The area of ​​the upper surface S14 of the pilot valve 1 is different from the area of ​​the lower surface S15 of the pilot valve 1, which makes it easier to realize that the lower end of the slide rod 5 and the lower end of the pilot valve 1 are subjected to the upward force (such as hydraulic pressure) exerted by the fluid, and the upper end of the pilot valve 1 is subjected to the downward force exerted by the fluid and the downward force exerted by the constant force electromagnet. Setting such an area relationship can make the action response of the entire solenoid valve stable and fast.

[0060] Fig.12 yes Figure 1-Figure 2 The schematic diagram of the structure of the main overflow valve body of the solenoid valve shown in the figure includes an enlarged schematic diagram of the local L. Fig.12 For example, the second gap G2 is an annular gap, that is, an annular gap around the first direction X, for example, a closed annular gap around the slide bar 5. Designing the second gap G2 as a closed annular gap is beneficial to the effect of controlling the fluid flow and design calculation, and is 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 a plurality of parts spaced apart from each other, as long as a smaller gap can be formed here so that the fluid is decelerated in the process of passing through the second gap.

[0061] For example, the dimension of the overflow valve cover 4 along the first direction X is greater than the dimension along the second direction Y, and the second direction Y is perpendicular to the first direction X, so as to form a relatively narrow and long passage for fluid flow extending along the first direction X. For example, the cross-sectional shape of the overflow valve cover 4 is basically in the shape of a "J".

[0062] For example, combined with Figure 1 and Figure 5-7 The pilot valve 1 also includes a slide rod 5 matching hole V3 located on the inner surface of the upper wall S13. The slide rod 5 matching hole V3 is located on the side of the through hole away from the pilot valve inlet OP1 in the first direction X. The second end of the slide rod 5 is embedded in the slide rod 5 matching hole V3 to be connected to the upper wall S13 of the pilot valve 1.

[0063] For example, refer to Fig.12 , the through hole V2 includes a first sub-portion V21 that passes through the overflow valve cover 4 and is close to 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; the slide bar 5 passes through the second sub-portion V22 and the first sub-portion V21 in sequence, and the second gap G2 includes a first sub-gap G21 between the hole wall of the first sub-portion V21 and the slide bar 5 and a second sub-gap G22 between the hole wall of the second sub-portion V22 and the slide bar 5, the aperture of the first sub-portion V21 is smaller than the aperture of the second sub-portion V22, and the width of the first sub-gap G21 is smaller than the width of the second sub-gap G22. The aperture refers to the size in the radial direction. In the embodiment of the present disclosure, the plane formed by the radial direction is perpendicular to the first direction X. The second sub-gap G22 with a narrower design width can control the flow while making the pressure flow characteristics less affected by temperature, thereby making the working state of the solenoid valve more stable.

[0064] For example, refer to Figure 1 and Figure 2, the relief valve body 3 includes a first valve body portion 31 and a second valve body portion 32. The first valve body portion 31 includes a first plate-shaped valve body portion 311, a first annular valve body portion 312 located at the edge of the first plate-shaped valve body portion 311, and a first valve body opening 313 penetrating the first plate-shaped valve body portion 311. The second valve body portion 32 is fixedly connected to the first valve body portion 31, and includes a second plate-shaped valve body portion 321, a second annular valve body portion 322 located at the edge of the second plate-shaped valve body portion 321, and a second valve body opening 323 penetrating the second plate-shaped valve body portion 321. The first annular valve body portion 312 is located outside the second annular valve body portion 322 and is connected to the second annular valve body portion 322, and the second plate-shaped valve body portion 321 and the first plate-shaped valve body portion 311 are relatively spaced apart in the first direction X to form an intermediate cavity 30 therebetween, the second plate-shaped valve body portion 321 is located on a side of the first plate-shaped valve body portion 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 relief valve cover 4 (i.e., the first end of the main body 40 of the relief valve cover 4) is fixed in the first valve body opening 313, and the second end of the relief valve cover 4 (i.e., the second end of the main body 40 of the relief valve cover 4) is fixed in the second valve body opening 323, so that the main body 40 of the relief valve cover 4 passes through the first plate-shaped valve body portion 311 and the second plate-shaped valve body portion 321 along the first direction X. Thus, on the one hand, an assembly design capable of realizing the overflow valve cover 4 is formed, and the overflow valve cover 4 cooperates with the slide bar 5, the pilot valve 1, and the electromagnetic drive part 300 to realize the function of enabling the pilot valve 1 to move along the first direction X and reach a balanced state; on the other hand, the overflow valve port (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 begins to overflow through the overflow valve port, thereby stabilizing the pressure. In a stable state, the upper part of the pilot valve 1 is connected to the fluid channel of the intermediate cavity 30, and there is only pressure but no flow.

[0065] For example, refer to Figure 1 and Figure 2, the main overflow valve portion 100 further includes an overflow valve seat 6, which is located on the side of the overflow valve body 3 away from the pilot valve 1 in the first direction X, and includes the above-mentioned liquid inlet H1, the liquid outlet H2 and the partition 61 located between the liquid inlet H1 and the liquid outlet H2. For example, the liquid inlet H1 and the liquid outlet H2 can both be annular openings around the first direction X. Of course, in other embodiments, the liquid inlet H1 and the liquid outlet H2 are not limited to closed annular openings, but can also be unclosed annular openings. The overflow valve body 3 is configured to be movable in the first direction X so that the overflow valve port H3 is formed between the second annular valve body portion 322 and the partition 61. That is, the overflow valve body 3 moves away from the overflow valve seat 6 in the first direction X under the pressure in the cavity C1 below it (on the side close to the overflow valve seat 6) and the pressure in the above-mentioned intermediate cavity 30, thereby separating from the overflow valve seat 3, and the overflow valve port H3 is formed between the two. The cavity C1 is formed by the relief valve body 3 and the relief valve seat 6. The cavity C1 is connected to the liquid inlet H1. Since the relief valve port H3 is formed, the fluid in the cavity C1 can flow out of the cavity C1 through the relief valve port H3, thereby stabilizing the pressure in the solenoid valve. For example, the fluid flowing out of the relief valve port H3 is further discharged from the solenoid valve through the liquid outlet H2.

[0066] For example, refer to Figure 1 The pilot valve 1 further includes a first communication hole VH1 that penetrates the upper wall S13 of the pilot valve 1 along the first direction X. The fluid in the internal cavity of the pilot valve 1 can flow out through the first communication hole VH1 and enter the upper part 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). Figure 2 and Figure 8 The diverter block 2 further includes a second communication hole VH2 that penetrates the diverter block 2 along the first direction X. The second communication hole VH2 is connected to the first communication hole VH1, and the pilot valve 1 and the diverter block 2 are configured to allow the fluid to enter the second communication hole VH2 via the first communication hole VH1. Figure 2 The first valve body 31 further includes a third communication hole VH3 penetrating the first plate-shaped valve body 311 along the first direction X, the second communication hole VH2 is connected to the third communication hole VH3, and the third communication hole VH3 is connected to the intermediate cavity 30. Under a given working current, the pilot valve 1 is balanced, the pilot valve 1 moves to a balanced position, and the fluid in the internal cavity of the pilot valve 1 is connected to the third communication hole VH3 through the second communication hole VH2 on the diverter block 2, thereby reaching the intermediate cavity 30. This fluid path is referred to as path 1. Path 1 consists of Figure 1 and Figure 2Indicated by the dotted arrow in . Thus, the solenoid valve can achieve pressure balance and flow adjustment in the internal cavity of the pilot valve 1 under different working currents. Due to the existence of path 1, the steady-state and dynamic adjustment of the pilot valve 1 is faster. In addition, the above-mentioned overflow valve port H3 can be generated to generate overflow and adjust the pressure inside the solenoid valve.

[0067] For example, refer to Fig.12 The second plate-like valve body portion 321 has an upper surface 321a close to the first plate-like valve body portion 311 in the first direction X and a lower surface 321b away from the first plate-like valve body portion 311 in the first direction X, and the second valve body opening 323 passes through the upper surface 321a and the lower surface 321b of the second plate-like valve body portion 321, and the area of ​​the lower surface 321b of the second plate-like valve body portion 321 is smaller than the area of ​​the upper surface 321a of the second plate-like valve body portion 321.

[0068] Figure 8 yes Figure 1-Figure 2 The schematic diagram of the structure of the shunt block of the solenoid valve shown in FIG. Fig. 9 is along Figure 8 Schematic diagram of the cross section of line BB in ( Fig. 9 The pilot valve is shown in Fig.10 is along Figure 8 Schematic diagram of the cross section of the CC line in ( Fig.10 The pilot valve is shown in Fig.11 yes Figure 1-Figure 2 The three-dimensional structure diagram of the diverter block of the solenoid valve is shown in FIG. Figure 2 and Figure 8-Figure 11 For example, the flow diverter channel 21 further includes a longitudinal flow diverter channel 212 and a flow diverter hole VH5. The longitudinal flow diverter channel 212 extends along the first direction X, penetrates the upper surface S22 of the flow diverter block 2, and communicates with the transverse flow diverter channel 211. The flow diverter hole VH5 penetrates the flow diverter block 2 along the first direction X, is spaced apart from the longitudinal flow diverter channel 212 in the direction surrounding the pilot valve 1, and is configured to allow the fluid from the longitudinal flow diverter channel 212 to enter the flow diverter hole VH5. Figure 2The solenoid valve also includes a first housing 101 and a fourth connecting hole VH4 located between the first housing 101 and the first annular valve body portion 312, the diverter hole VH5 is connected to the fourth connecting hole VH4, and the fourth connecting hole VH4 is connected to the liquid outlet H2. Thus, a fluid path 2 is formed, in which the fluid in the internal cavity of the pilot valve 1 enters the diverter hole VH5 in turn through the pilot valve port 11, the transverse diverter channel 211, and the longitudinal diverter channel 212, and then enters the fourth connecting hole VH4 and the liquid outlet H2 from the diverter hole VH5 in turn, and is discharged from the solenoid valve through the liquid outlet H2. For example, path 2, as an oil return channel of the solenoid valve, can increase the adjustment path for applying adjustable damping to the fluid, which will greatly enhance the ability of the shock absorber using the solenoid valve to adjust the damping of the fluid. Since the above-mentioned path 1 and path 2 are set in the solenoid valve provided in the embodiment of the present disclosure, the pilot valve 1 is adjusted to a balanced state under a given current value. During this process, the pilot valve 1 moves and changes the size of the pilot valve port 11, thereby adjusting the flow of the return oil channel by changing the size of the pilot valve port 11. By adjusting the current value, the pilot valve 1 can be adjusted to reach different balanced states, thereby realizing continuous adjustment of the damping.

[0069] For example, combined with Figure 1-2 and Fig.11 , the first connecting hole VH1 and the diverter hole VH5 are isolated from each other, and the pilot valve 1 and the diverter block 2 are configured to not allow the fluid to enter the diverter channel 21 and the diverter hole VH5 of the diverter block 2 through the first connecting hole VH1. Fig.11 As shown, the diverter block 2 has a boss 22, which protrudes in the first direction X from the plane where one end of the first connecting hole VH1 is located (i.e., the upper surface S14 of the pilot valve 1), the plane S222 where one end of the second connecting hole VH2 is located, and the plane S221 where one end of the diverter hole VH5 is located away from the main overflow valve part 100 in the first direction X. Fig.11 , plane S221 is the first part of the upper surface S22 of the diverter block 2, and a diverter hole VH5 is provided on the plane S221; plane S222 is the second part of the upper surface S22 of the diverter block 2, and a second connecting hole VH2 is provided on the plane S222. The first part S221 of the upper surface S22 of the diverter block 2 and the second part S222 of the upper surface S22 of the diverter block 2 are separated by the boss 22. For example, the first part S221 of the upper surface S22 of the diverter block 2 is in a ring shape surrounding the boss 22. For example, the boss 22 separates the first connecting hole VH1 and the second connecting hole VH2 from the diverter hole VH5 and the longitudinal diverter channel 212 of the diverter block 2, respectively, the first connecting hole VH1 and the second connecting hole VH2 are located on the inner side of the boss 22, the diverter hole VH5 of the diverter 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 located Fig.11 In the hollowed-out area in the middle, Fig.11 The pilot valve 1 is not shown in the figure, and the inner side of the boss 22 is the side close to the hollowed-out area of ​​the boss 22 (ie, the area where the pilot valve 1 is arranged).

[0070] For example, combined with Figure 5 and Fig.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 diverter block 2 with the diverter hole VH5 in the first direction X, and higher than the height of the second portion S222 of the upper surface S22 of the diverter block 2 with the second connecting hole VH2 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 with the first connecting hole VH1. Thus, the above-mentioned path 1 and path 2 can be realized respectively, and the fluid is prevented from entering the diverter channel 21 and the diverter hole VH5 of the diverter block 2 through the first connecting hole VH1.

[0071] For example, refer to Figure 2 , Fig. 9 and Fig.11 , the flow diverter hole VH5 includes a first sub-section VH51 and a second sub-section VH52, the first sub-section VH51 and the second sub-section VH52 are connected and partially staggered in the first direction X; in the first direction X, the second sub-section VH52 is located on the side of the first sub-section VH51 close to the main overflow valve section 100, and is located outside the first sub-section VH51. The outside of the first sub-section VH51 refers to the side of the first sub-section V21 close to the second housing 201. Designing the flow diverter hole VH5 to include two sections of flow channels that are connected to each other and staggered is conducive to ensuring the patency of the flow channel, and is convenient for making the second sub-section VH52 closer to the second housing 201, so as to facilitate communication with the fourth connecting hole VH4 close to the first housing 101.

[0072] For example, refer to Figure 8 The diverter block 2 is in the shape of a ring. The longitudinal diverter channel 212 and the diverter hole VH5 each pass through the center of the end of the diverter block 2 away from the upper surface S22 of the main overflow valve part 100. The angle θ1 between the line connecting the center of the ring is 90°, which is conducive to achieving symmetrical design, easy to manufacture, and stable structural operation.

[0073] For example, refer to Figure 8 The angle θ2 between the line connecting the center of the second connecting hole VH2 of the diverter block 2 and the center of the circular ring and the line connecting the center of one end of the longitudinal diverter channel 212 that passes through the upper surface S22 of the diverter block 2 and the center of the circular ring is 90°, which is conducive to achieving a symmetrical design, easy to manufacture, and stable structural operation.

[0074] For example, refer to Figure 1 , Figure 4-Figure 7, the pilot valve 1 includes a first end face S11 in a second direction Y and a second end face S16 opposite to the first end face S11, and the second direction is perpendicular to the first direction X. The 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 is columnar as a whole, and the side of the pilot valve 1 is a curved surface surrounding the first direction X. The first end face S11 and the second end face S16 are part of the side of the pilot valve 1, that is, the first end face S11 and the second end face S16 are two opposite parts of a curved surface that surrounds the first direction X as a whole in the second direction Y. Reference Fig.10 The transverse flow-dividing channel 211 includes a first transverse flow-dividing channel 211a and a second transverse flow-dividing channel 211b which are respectively arranged 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 transverse flow-dividing channel 211a penetrates the inner surface of the flow-dividing block 2 opposite to the first end surface S11 of the pilot valve 1, and the portion of the first end of the through hole V1 exposed by the first transverse flow-dividing channel 211a and connected to the first transverse flow-dividing channel 211a constitutes the first pilot valve port 11; the second transverse flow-dividing channel 211b penetrates the inner surface of the flow-dividing block 2 opposite to the first end surface S12 of the second end surface of the pilot valve 1, and the portion of the second end of the through hole V1 exposed by the second transverse flow-dividing channel 211b and connected to the second transverse flow-dividing 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 illustrated embodiment, the transverse flow-dividing channel 211 is a closed annular groove surrounding the pilot valve 1 , and the first transverse flow-dividing channel 211 a and the second transverse flow-dividing channel 211 b 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 may be spaced apart from each other and are respectively non-enclosed arc grooves surrounding the pilot valve 1. This design scheme can also enable the solenoid valve to achieve the above functions.

[0077] For example, in the solenoid valve provided in at least one embodiment of the present disclosure, safety protection is also provided for when the solenoid valve fails, so that when the solenoid valve is powered off or the driver fails, a power-off safety mode is implemented to form power-off protection and ensure basic driving and operating safety.

[0078] Fig.13 yes Figure 1-Figure 2 The schematic diagram of the failure protection structure of the solenoid valve shown in FIG. Fig.14 is along Fig.13 Schematic diagram of the cross section of the DD line in Fig.15 is along Fig.13 Schematic diagram of the cross section of the EE line in Figure 2. Figure 1 , Figure 2 and Figure 13-15 For example, the solenoid valve further includes a safety plate 7, a current-passing spring plate 8 and a safety gasket 9 (such as Figure 1 and Figure 2 ). The safety piece 7 is located on the upper surface of the diverter block 2, covering the longitudinal diverter channel 212, and has a plurality of small holes corresponding to the longitudinal diverter channel 212. The over-current spring piece 8 is located above the safety piece 7 and can produce elastic deformation. The safety washer 9 is located above the over-current spring piece 8, and the over-current spring piece 8 is located between the safety washer 9 and the safety piece 7. The safety washer 9 is configured as follows: when the solenoid valve is in an unpowered state, no magnetic force is generated on the over-current spring piece 8 and the safety piece 7, so that the safety piece 7 is attached to the upper surface of the diverter block 2 under the pressure exerted by the fluid above it, and the fluid of the pilot valve 1 passes through the longitudinal diverter channel 212 and then flows out of the solenoid valve through the plurality of small holes of the safety piece 7. At this time, the fluid flowing out of the pilot valve 1 through the longitudinal shunt channel 212 exists above the safety plate 7, that is, exists in the space between the safety plate 7 and the flow-through spring 8. This part of the fluid will produce downward pressure on the safety plate 7, and this pressure will press the safety plate 7 against the upper surface of the shunt block 2. The safety plate 7 fits with the upper surface of the shunt block 2 below it to form a seal. 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 plate 7, that is, it can only flow out from the longitudinal shunt channel 212 through the small holes on the safety plate 7, and enter the shunt hole VH5 through the small holes on the safety plate 7 to return the oil. In this case, the liquid flows out of the pilot valve 1 through multiple small holes in the safety plate 7, and the flow rate is greatly reduced, generating a back pressure of the pilot valve 1, so that the set pressure of the entire solenoid valve is higher than the pressure at the minimum current, thereby realizing the power-off safety mode. By adjusting the diameter of the small hole, different safety mode pressures can be achieved. That is to say, when the solenoid valve is powered off, the pressure can still be adjusted by the flow through the multiple small holes of the safety plate 7, but this flow is smaller than that in the normal working state, so as not to make the solenoid valve completely ineffective, thereby achieving power-off protection, and ensuring basic driving and operating safety when the solenoid valve is powered off or the driver fails. When the solenoid valve is powered off, the pressure difference between the liquid inlet H1 and the liquid outlet H2 of the solenoid valve at a given flow rate is independent of the current. Therefore, the solenoid valve can effectively achieve safety protection when it fails.

[0079] For example, the size (aperture) of each small hole is not greater than about 0.2 mm, for example, 0.1 mm to 0.3 mm. The size of each small hole is not limited, and those skilled in the art can design it according to different flow and pressure settings. For example, the small hole can be a round hole or a square hole to facilitate manufacturing and design calculations. Alternatively, the small hole can also be other regular shapes and irregular shapes, and the embodiment of the present disclosure does not limit the shape of the small hole.

[0080] And, reference Figure 1 , Fig.14 and Fig.15 , the safety gasket 9 is also configured to: when the electromagnetic valve is in the power-on state, a magnetic force is generated on the overcurrent spring piece 8 and the safety piece 7 so that the overcurrent spring piece 8 and the safety piece 7 are adsorbed on the lower surface of the safety gasket 9, thereby forming a gap between the safety piece 7 and the diverter block 2. At this time, the fluid flowing out of the pilot valve 1 can enter the oil return channel normally through the gap instead of the small hole on the safety piece 7, thereby realizing the operation in the normal mode. The electromagnetic drive unit 300 includes an armature support 320, an armature 340 is located on the side of the armature support 320 away from the pilot valve 1, and an armature shaft 330 passes through the armature support 320 along the first direction X. For example, the inner edge of the safety gasket 9 is connected to the armature support 320, and the two are tightly matched to generate a magnetic force on the overcurrent spring piece 8 and the safety piece 7 when the electromagnetic valve is in the power-on state, and the magnetic force overcomes the elastic force of the overcurrent spring piece 8, and adsorbs the overcurrent spring piece 8 and the safety piece 7 to the lower surface of the safety gasket 9. For example, the outer edge of the safety gasket 9 is connected to the second shell 201, and the two are tightly matched.

[0081] For example, the overcurrent spring piece 8 and the safety piece 7 are respectively in the shape of a ring around the pilot valve 1 and the boss 22, and the shapes of the outer contours of the two are basically the same, for example, an open ring, for example, the same shape as the portion of the upper surface of the shunt block 2 surrounding the boss 22, and are arranged corresponding to the portion of the upper surface of the shunt block 2 surrounding the boss 22, so as to form the safety piece 7 of the longitudinal shunt channel 21 with an integral structure, and the overcurrent spring piece 8 is arranged corresponding to the safety piece 7, which is also an integral structure, reducing parts and components, and facilitating the stability of the structure formed after the overcurrent spring piece 8, the safety piece 7 and the shunt block 2 are installed. Therefore, when the solenoid valve is in the energized state, the gap formed between the safety piece 7 and the shunt block 2 is also annular.

[0082] For example, there is a gap between the safety gasket 9 and the upper surface S22 of the shunt block 2, so that the current spring 8 and the safety sheet 7 are arranged in the gap. For example, the height of the gap in the first direction X is about 0.2 mm, such as 0.1 mm to 0.3 mm. Of course, the specific range of the gap is not limited, and the above examples are intended to express that the magnitude of the size of the gap is approximately the above magnitude.

[0083] For example, the safety gasket 9 is arranged around the boss 22 and seals the space outside the boss 22. The “sealing the space outside the boss 22” here means isolating the space outside the boss 22 from the space inside the boss 22 to prevent the fluid outside the boss 22 from entering the space inside the boss 22, thereby preventing the fluid in the diverter hole VH5 and the longitudinal diverter channel 212 located on the outside of the boss 22 from entering the first connecting hole VH1 and the second connecting hole VH2 located on the inside of the boss 22, thereby realizing the above-mentioned path 1 and path 2.

[0084] For example, the safety gasket 9 is in a ring shape surrounding the boss 22. For example, the orthographic projection of the safety gasket 9 on the upper surface S22 of the shunt block 2 is located within the orthographic projection of the current-passing spring piece 8 on the upper surface S22 of the shunt block 2. Figure 1 As shown, the radial width of the safety gasket 9 is smaller than the radial width of the first portion S221 of the upper surface S22 of the shunt block 2, the armature support 320 contacts the upper surface of the boss 22, and the safety gasket 9 and the armature support 320 jointly seal the space outside the boss 22. For example, in other implementations, the radial width of the safety gasket 9 may be equal to the radial width of the first portion S221 of the upper surface S22 of the shunt block 2, and the safety gasket 9 may be tightly connected to the step portion of the boss 22 to seal the space outside the boss 22.

[0085] At least one embodiment of the present disclosure further provides a shock absorber, which may be a shock absorber of a mechanical device, such as a shock absorber of a vehicle. Fig.16 A schematic diagram of a shock absorber provided in one embodiment of the present disclosure.

[0086] like Fig.16 As shown, the shock absorber 500 includes any one of the solenoid valves 400 provided in the embodiments of the present disclosure. Therefore, the shock absorber 500 can realize continuous adjustable damping under the drive of the working current, and can also remain safe in the event of power failure or driver failure, thereby ensuring basic driving and handling safety. The shock absorber provided in the embodiments of the present disclosure adopts a new design of a solenoid valve that can be applied to the shock absorber to effectively adjust the pressure of the fluid entering the solenoid valve during the operation of the shock absorber. The shock absorber provided in the embodiments of the present disclosure has all the technical effects of the solenoid valve provided in the embodiments of the present disclosure, which will not be repeated here.

[0087] There are a few points to note:

[0088] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure. Other structures may refer to the general design.

[0089] (2) For the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the thickness of layers or regions is enlarged or reduced, that is, these drawings are not drawn according to the actual scale.

[0090] (3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0091] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A solenoid valve, comprising: A pilot valve portion, wherein the pilot valve portion comprises a pilot valve and a diverter block, the diverter block surrounds the pilot valve in a manner surrounding a first direction; The pilot valve comprises a through hole, and the through hole penetrates a first end surface of the pilot valve facing the diverter block; The diverter block includes a diverter channel, the diverter channel includes a transverse diverter channel, the transverse diverter channel penetrates the inner surface of the diverter block opposite to the first end surface of the pilot valve, and the portion of the through hole exposed by the transverse diverter channel and communicating with the transverse diverter channel constitutes a pilot valve port; The pilot valve is configured to be movable in the first direction to change a size of the pilot valve port.

2. The solenoid valve according to claim 1, wherein: The solenoid valve further comprises: The main relief valve portion 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 close to the relief valve body in the first direction and a pilot valve inlet penetrating the lower wall along the first direction, and the pilot valve inlet is communicated with the through hole; There is a first gap between the 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 is connected to the inlet of the pilot valve, and the surface of the overflow valve body close to the pilot valve in the first direction is in contact with the surface of the diverter block close to the overflow valve body in the first direction.

3. The solenoid valve according to claim 2, wherein: A groove is provided 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 relief valve body close to the pilot valve in the first direction.

4. The solenoid valve according to claim 2, wherein: The main relief valve portion further comprises: Liquid inlet; A relief valve cover, comprising a main body and a through hole penetrating the main body along the first direction, wherein the relief valve cover main body passes through the relief valve body along the first direction, a first end of the through hole is communicated with the liquid inlet, and a second end of the through hole is communicated with the pilot valve inlet; and A sliding rod extends along the first direction, passes through the through hole and the pilot valve inlet and enters the pilot valve, wherein the pilot valve also includes an upper wall opposite to the lower wall in the first direction, the first end of the sliding rod is located in the through hole and has a second gap with the hole wall of the through hole, and the second end of the sliding rod is connected to the upper wall of the pilot valve.

5. The solenoid valve according to claim 4, wherein: The through hole comprises a first sub-portion penetrating through the upper cover plate of the relief valve cover close to the pilot valve and a second sub-portion located on a side of the first sub-portion away from the pilot valve; The sliding rod passes through the second sub-section and the first sub-section in sequence, the second gap includes a first sub-gap between the hole wall of the first sub-section and the sliding rod and a second sub-gap between the hole wall of the second sub-section and the sliding rod, the aperture of the first sub-section is smaller than the aperture of the second sub-section, 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 relief valve body comprises: a first valve body portion, comprising a first plate-shaped valve body portion, a first annular valve body portion located at an edge of the first plate-shaped valve body portion, and a first valve body opening penetrating through 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 is connected to the second annular valve body portion, and the second plate-shaped valve body portion and the first plate-shaped valve body portion are relatively spaced apart in the first direction to form an intermediate cavity therebetween, the second plate-shaped valve body portion is located on a side of the first plate-shaped valve body portion away from the pilot valve, the second valve body opening is opposite to the first valve body opening, the first end of the relief valve cover is fixed in the first valve body opening, and the second end of the relief valve cover is fixed in the second valve body opening.

7. The solenoid valve according to claim 6, wherein: The main relief valve portion further comprises: The overflow valve seat is located on a side of the overflow valve body away from the pilot valve in the first direction, and includes the liquid inlet, the liquid outlet, and a partition located between the liquid inlet and the liquid outlet, wherein: The relief valve body is configured to be movable in the first direction so that a relief 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 close to the first plate-shaped valve body portion in the first direction and a lower surface away from the first plate-shaped valve body portion in the first direction, the second valve body opening passes through the upper surface and the lower surface of the second plate-shaped valve body portion, and 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 communication hole penetrating through the upper wall of the pilot valve along the first direction, and the diverter block further includes a second communication hole penetrating through the diverter block along the first direction; The second communicating hole is in communication with the first communicating hole, and the pilot valve and the diverter block are configured to allow fluid to enter the second communicating hole via the first communicating hole; The first valve body portion further includes a third communication hole penetrating the first plate-shaped valve body portion along the first direction, the second communication hole is communicated with the third communication hole, and the third communication hole is communicated with the intermediate cavity.

10. The solenoid valve according to claim 9, wherein: The diversion channel also includes: a longitudinal flow-dividing channel extending along the first direction, penetrating the upper surface of the flow-dividing block, and communicating with the transverse flow-dividing channel; and a flow dividing hole, penetrating the flow dividing block along the first direction, spaced apart from the longitudinal flow dividing channel in a direction surrounding the pilot valve, and configured to allow the fluid from the longitudinal flow dividing channel to enter the flow dividing hole; The solenoid valve further includes a first housing and a fourth communicating hole located between the first housing and the first annular valve body portion, the diverter hole is communicated with the fourth communicating hole, and the fourth communicating hole is communicated with the liquid outlet.

11. The solenoid valve according to claim 10, wherein: The first communicating hole and the diverting hole are isolated from each other, and the pilot valve and the diverting block are configured not to allow the fluid to enter the diverting channel and the diverting hole of the diverting block through the first communicating hole.

12. The solenoid valve according to claim 11, wherein: The diverter block has a boss, which protrudes in the first direction from a plane where one end of each of the first communicating hole, the second communicating hole and the diverter hole in the first direction away from the main overflow valve portion is located, and The boss separates the first connecting hole and the second connecting hole from the diverter hole of the diverter block respectively, the first connecting hole and the second connecting hole are located on the inner side of the boss, the diverter hole of the diverter block is located on the outer side of the boss, and the boss is configured to prevent liquid from flowing between the inner side and the outer side of the boss.

13. The solenoid valve according to claim 12, wherein: The solenoid valve further comprises: A safety sheet, located on a side of the upper surface of the diverter block away from the main overflow valve portion, covers the longitudinal diverter channel, and has a plurality of small holes corresponding to the longitudinal diverter channel; A current-passing spring sheet, located above the safety sheet and capable of elastic deformation; A safety washer is located above the overcurrent spring, wherein the overcurrent spring is located between the safety washer and the safety sheet. The safety gasket is configured such that: when the solenoid valve is in an unpowered state, no magnetic force is generated on the flow-through spring and the safety plate, so that the safety plate adheres to the upper surface of the diverter block under the pressure exerted by the fluid above it, and the fluid of the pilot valve flows out of the solenoid valve through the multiple small holes of the safety plate after passing through the longitudinal diverter channel, and, When the solenoid valve is powered on, a magnetic force is generated on the overflow spring piece and the safety piece so that the overflow spring piece and the safety piece are adsorbed onto the lower surface of the safety gasket, thereby forming a gap between the safety piece and the shunt block.

14. The solenoid valve according to claim 12, wherein: The diverter hole comprises a first sub-portion and a second sub-portion, wherein the first sub-portion and the second sub-portion are connected and partially staggered in the first direction; In the first direction, the second sub-portion is located at a side of the first sub-portion close to the main overflow valve portion and is located outside the first sub-portion.

15. The solenoid valve according to claim 12, wherein: The diverter block is in the shape of a ring, and the angle between the line connecting the center of one end of the diverter block away from the main overflow valve portion and the center of the ring 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 circle of the ring and the line connecting the center of one end of the longitudinal diverter channel passing through the upper surface of the diverter block and the center of the circle of the ring is 90°.

16. The solenoid valve according to claim 2, wherein: An area of ​​an upper surface of the pilot valve that is distant from the main relief valve portion in the first direction is smaller than an area of ​​a lower surface of the pilot valve that is close to the main relief valve portion in the first direction.

17. The solenoid valve according to claim 2, wherein: The solenoid valve further comprises: an electromagnetic driving portion, located on a second side of the pilot valve portion in the first direction, wherein the second side of the pilot valve portion is opposite to the first side of the pilot valve portion, The electromagnetic driving portion includes an armature shaft configured to apply a force toward the main relief valve portion to the pilot valve under a condition that a given current is applied to the electromagnetic driving portion.

18. The solenoid valve according to claim 1, wherein: The pilot valve comprises the first end face in a second direction and a second end face opposite to the first end face, 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 transverse flow dividing channel comprises a first transverse flow dividing channel and a second transverse flow dividing channel respectively arranged 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 flow-dividing channel penetrates the inner surface of the flow-dividing block opposite to the first end surface of the pilot valve, and the portion of the first end of the through hole exposed by the first transverse flow-dividing channel and communicating with the first transverse flow-dividing channel constitutes a first pilot valve port; The second transverse flow-dividing channel penetrates the inner surface of the flow-dividing block opposite to the second end surface of the pilot valve, and the portion of the second end of the through hole exposed by the second transverse flow-dividing channel and communicating with the second transverse flow-dividing channel constitutes a second pilot valve port; The pilot valve is configured to be movable in a first direction to change a size of the first pilot valve port and a size of the second pilot valve port.

19. The solenoid valve according to claim 18, wherein: The transverse flow-dividing channel is a closed annular groove surrounding the pilot valve, and the first transverse flow-dividing channel and the second transverse flow-dividing channel are connected to each other to form the closed annular groove; or, The first transverse flow-dividing channel and the second transverse flow-dividing channel are arranged at intervals from each other and are respectively non-enclosed arc-shaped grooves surrounding the pilot valve.

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

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