On-off solenoid valve and damping adjustment device

Abstract

The utility model discloses switch electromagnetic valve and damping adjusting device belong to electromagnetic valve technical field, and the design is for solving the problem that existing electromagnetic valve is driven by magnetic force entirely and so on cone rod. The utility model discloses switch electromagnetic valve includes: valve body, valve piece group, control valve body, including control valve main part and installation column, and the control valve main part is opened with valve body recess along the axial direction, and the lateral wall on valve body recess is opened with radial through -hole, control valve core is arranged in valve body recess in one end, spring is abutted to control valve core in one end, and spring and control valve body are located the opposite sides of control valve core respectively, valve bush, electromagnetic base and valve seat. The utility model discloses switch electromagnetic valve and damping adjusting device, and spring can provide auxiliary driving force for control valve core, need not drive by magnetic force entirely, and the energy consumption is low, and the performance requirement of magnetic force driving device is low, and the response speed of control valve core is fast, and the service life of this switch electromagnetic valve is long, the structure is more simple, and the use is more comfortable, and the use cost is low.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valve technology, and in particular to a switching solenoid valve and a damping adjustment device. Background Technology

[0002] The damping adjustment device mainly includes a piston rod, an outer cylinder, an intermediate cylinder, and a solenoid valve. The piston rod passes through the intermediate cylinder, which in turn passes through the outer cylinder. The outer shell of the solenoid valve is fixed to the outer cylinder, and the inner core of the solenoid valve is in contact with the intermediate cylinder. When the electronically controlled shock absorber is working, the piston rod reciprocates axially, driving the oil in the intermediate cylinder to flow through the solenoid valve to the low-pressure area inside the outer cylinder.

[0003] The existing solenoid valve mainly includes an electromagnetic component and an oil circuit component set in the solenoid valve seat of the electromagnetic component. The oil circuit component includes a relief valve located at the bottom of the valve body. The relief valve includes a main valve core slidably connected to the valve body. The main valve core includes a large end section sleeved in the valve body and a small end section passing through an opening at the bottom of the valve body. The large end section has a damping hole at its bottom and an oil drain hole on its small end section. The electromagnetic component includes a tapered rod driven by magnetic force. The end of the tapered rod contacts the small end section of the main valve core to achieve sealing of the oil drain hole.

[0004] The shortcomings of existing solenoid valves include: the movement of the cone rod relies entirely on the magnetic force of the solenoid component, resulting in high energy consumption, high performance requirements for the solenoid component, and slow cone rod response speed. Utility Model Content

[0005] The purpose of this invention is to propose a switching solenoid valve and a damping adjustment device, which solves the problem that existing solenoid valves rely entirely on magnetic force to drive the cone rod, resulting in low energy consumption.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A solenoid valve includes: a valve body; a valve disc assembly fitted to the end face of the valve body, with an overflow space S1 formed between the valve body and the valve disc assembly, wherein a flow channel is formed between the valve body and the valve disc assembly when the fluid pressure in the overflow space S1 is greater than a set value; and a control valve body including a control valve main body and a mounting post, wherein the valve body and the valve disc assembly are sequentially sleeved on the mounting post, and the valve body, the valve disc assembly, and the control valve main body are sequentially fitted together; the control valve main body has a valve body groove along the axial direction, and a radial groove is formed on the side wall of the valve body groove. A flow hole, wherein the valve body groove communicates with the radial flow hole; a control valve core, one end of which passes through the valve body groove, wherein the control valve core can at least partially block the radial flow hole when moving axially; a spring, one end of which abuts against the control valve core, wherein the spring and the control valve body are respectively located on opposite sides of the control valve core; a valve sleeve, wherein the valve body, the valve plate assembly and the control valve body are at least partially passed through the valve sleeve; an electromagnetic base, which is sleeved on a portion of the outer periphery of the control valve core; and a valve seat, which is sleeved on the outside of the valve sleeve and the electromagnetic base.

[0008] In one preferred embodiment, the control valve body includes a first control valve body and a second control valve body, and the mounting post is connected to one of the first control valve body and the second control valve body.

[0009] In one preferred embodiment, the first body of the control valve and the second body of the control valve are respectively provided with grooves. After assembly, the grooves on the first body of the control valve and the grooves on the second body of the control valve are aligned and together form the radial flow hole.

[0010] In one preferred embodiment, the radial flow hole is swallow-shaped, and when the control valve core moves to different positions, the flow area of ​​the radial flow hole corresponds to a uniform damping force value.

[0011] In one preferred embodiment, three radial flow holes are provided on the side wall of the valve body groove, and the three radial flow holes are symmetrically arranged about the center of the valve body groove.

[0012] In one preferred embodiment, the switching solenoid valve further includes an adjusting screw that abuts against the other end of the spring; the mounting post has an axially oriented through-hole that connects to the valve body groove, and a flow-blocking element is provided in the through-hole; the control valve core has an axially oriented through-hole that connects the mounting post to the through-hole, and the adjusting screw is located on the extension line of the through-hole.

[0013] In one preferred embodiment, the valve body includes a valve body portion, the edge of which protrudes axially to form a valve body flange, and the valve plate assembly is fitted to the valve body flange; a valve mounting through hole is provided in the middle of the valve body portion for the mounting post to pass through, and a valve flow through hole is also provided on the valve body portion for liquid flow.

[0014] In one preferred embodiment, the valve plate assembly includes at least two elastic valve plates, all of which are sequentially attached along the axial direction.

[0015] In one preferred embodiment, the control valve core includes a valve core body and a valve core column connected together. The free end of the valve core body has a spring limiting groove, and a valve core through hole communicates with the spring limiting groove. A stepped surface for abutting the end of the spring is formed between the valve core through hole and the spring limiting groove. The control valve core also includes a limiting ring, which is fixedly connected to the outer peripheral surface of the valve core column by a radial connecting rib. The limiting ring passes through the valve body groove.

[0016] On the other hand, the present invention adopts the following technical solution:

[0017] The damping adjustment device includes an outer cylinder, an intermediate cylinder passing through the outer cylinder, and a piston rod passing through the intermediate cylinder. The damping adjustment device also includes the aforementioned solenoid valve. Through holes are respectively opened on the sides of the outer cylinder and the intermediate cylinder. The valve seat is fixedly connected to the through hole on the side of the outer cylinder, and the valve body is fixedly connected to the through hole on the side of the intermediate cylinder. When the piston rod moves axially, the liquid flow in the intermediate cylinder can enter the low-pressure region of the outer cylinder through the solenoid valve.

[0018] The solenoid valve disclosed in this utility model includes a spring, which can provide auxiliary driving force for the control valve core. It does not require full magnetic drive, has low energy consumption, low performance requirements for the magnetic drive device, fast response speed of the control valve core, and long service life.

[0019] The damping adjustment device disclosed in this utility model includes the aforementioned solenoid valve, which has a more streamlined and compact structure, is more comfortable to use, and has a lower operating cost; it provides sufficient space for increasing the outer diameter of the valve plate assembly, and the large outer diameter valve plate assembly can improve the comfort of damping force adjustment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the damping adjustment device provided in a specific embodiment of this utility model;

[0021] Figure 2 This is a cross-sectional view of the solenoid valve provided in a specific embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the valve body provided in a specific embodiment of the present utility model;

[0023] Figure 4 This is one of the structural schematic diagrams of the control valve body provided in a specific embodiment of this utility model;

[0024] Figure 5 This is the second structural schematic diagram of the control valve body provided in a specific embodiment of this utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the first main body of the control valve provided in a specific embodiment of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the second body of the control valve provided in a specific embodiment of this utility model;

[0027] Figure 8 This is one of the structural schematic diagrams of the control valve core provided in a specific embodiment of this utility model;

[0028] Figure 9 This is the second schematic diagram of the structure of the control valve core provided in a specific embodiment of this utility model;

[0029] Figure 10 This is a schematic diagram of the fluid flow path in the solenoid valve provided in a specific embodiment of this utility model.

[0030] In the picture:

[0031] 1. Valve body; 2. Valve disc assembly; 3. Control valve body; 4. Control valve core; 5. Spring; 6. Valve sleeve; 7. Electromagnetic base; 8. Valve seat; 9. Flow blocking component; 11. Valve body; 12. Valve flow through hole; 13. Valve mounting through hole; 14. Valve body flange; 31. Mounting post; 32. Valve body groove; 33. Radial flow hole; 34. First body of control valve; 35. Second body of control valve; 36. Post through hole; 41. Valve core through hole; 42. Valve core body; 43. Valve core post; 44. Limiting ring; 45. Connecting rib; 51. Adjusting screw; 100. Switching solenoid valve; 200. Outer cylinder; 300. Intermediate cylinder; 341. First body groove; 351. Second body groove; 400. Piston rod; 421. Spring limiting groove. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] This embodiment discloses a switching solenoid valve and a damping adjustment device including the switching solenoid valve, such as... Figure 1 As shown, the damping adjustment device includes a solenoid valve 100, an outer cylinder 200, an intermediate cylinder 300, and a piston rod 400. The piston rod 400 passes through the intermediate cylinder 300, which in turn passes through the outer cylinder 200. Through holes are provided on the sides of both the outer cylinder 200 and the intermediate cylinder 300, and the solenoid valve 100 is connected to these through holes. When the piston rod 400 moves axially, the fluid in the intermediate cylinder 300 can enter the low-pressure region of the outer cylinder 200 through the solenoid valve 100.

[0039] like Figure 1 and Figure 2 As shown, the switching solenoid valve includes a valve body 1, a valve plate assembly 2, a control valve body 3, a control valve core 4, a spring 5, a valve sleeve 6, an electromagnetic base 7, and a valve seat 8. The valve body 1 is fixedly connected to a through hole on the side of the intermediate cylinder 300 to receive the fluid flow into the switching solenoid valve through the intermediate cylinder 300. The valve plate assembly 2 is attached to the end face of the valve body 1, and an overflow space S1 is formed between the valve body 1 and the valve plate assembly 2. When the fluid pressure in the overflow space S1 is greater than a set value, a fluid flow channel can be formed between the valve body 1 and the valve plate assembly 2. The valve body 1, the valve plate assembly 2, and the control valve body 3 are at least partially inserted into the valve sleeve 6. The electromagnetic base 7 is sleeved on a portion of the outer periphery of the control valve core 4, and the portion of the outer periphery of the control valve core 4 abuts against the inner wall surface of the electromagnetic base 7. The valve seat 8 is sleeved on the outside of the valve sleeve 6 and the electromagnetic base 7, and the valve seat 8 is fixedly connected to a through hole on the side of the outer cylinder 200.

[0040] The control valve body 3 includes a control valve main body and a mounting post 31. The valve body 1 and the valve disc assembly 2 are sequentially fitted onto the mounting post 31 and tightly fitted together. The valve body 1, valve disc assembly 2, and control valve main body are sequentially fitted together, resulting in a more compact overall structure. The mounting post 31 can be a standalone unit, or it can form an integrated structure with the valve body 1 or the control valve main body. The control valve main body has an axially oriented valve body groove 32, and one end of the control valve core 4 passes through this groove. A radial flow hole 33 is formed on the side wall of the valve body groove 32, connecting the groove to the space outside the control valve body 3. When the control valve core 4 moves axially, it can at least partially block the radial flow hole 33, thereby changing the effective flow cross-sectional area connecting the valve body groove 32 and the external space.

[0041] One end of the spring 5 abuts against the other end of the control valve core 4, and the other end of the spring 5 abuts against the adjusting screw 51. That is, the spring 5 and the control valve body 3 are located on opposite sides of the control valve core 4. The spring 5 can provide auxiliary driving force for the control valve core 4, eliminating the need for full magnetic drive, resulting in low energy consumption, low performance requirements for the magnetic drive device, fast response speed of the control valve core 4, and long service life of the switching solenoid valve.

[0042] The method for regulating and controlling the fluid flow using this solenoid valve is as follows: In the initial position, one end of the control valve core 4 blocks or partially blocks the radial flow hole 33, at which point the fluid flow area is A1. After the solenoid valve is energized, the control valve core 4 tends to move to the right under the action of electromagnetic force, at which point the spring 5 is compressed; as the current increases, the electromagnetic force increases, the spring 5 is compressed and deformed, the control valve core 4 moves to the right, and the area of ​​the radial flow hole 33 blocked changes accordingly, thereby changing the fluid flow area to A2, and changing the ease with which the fluid flows through the solenoid valve, thus achieving the function of damping force regulation. This solenoid valve has a simpler structure, is more comfortable to use, and has a lower operating cost; it also provides sufficient space for increasing the outer diameter of the valve plate assembly 2, and the larger outer diameter valve plate assembly 2 can improve the comfort of damping force regulation.

[0043] like Figure 3 As shown, the valve body 1 includes a valve body portion 11, with an axially protruding edge forming a valve body flange 14. The valve plate assembly 2 is fitted to the valve body flange 14. A valve mounting through-hole 13 for the mounting post 31 to pass through is provided in the middle of the valve body portion 11. Several valve flow through-holes 12 connecting the two sides of the valve body 1 are also provided on the valve body portion 11, allowing fluid flow through the valve flow through-holes 12. Both the valve mounting through-hole 13 and the valve flow through-holes 12 extend along the axis; the specific number of valve flow through-holes 12 on the valve body 1 is not limited and can be determined according to the fluid flow requirements.

[0044] like Figure 2As shown, one end of the valve plate assembly 2 is attached to the valve body flange 14, and the other end of the valve plate assembly 2 is attached to the control valve body 3. The specific structure of the valve plate assembly 2 is not limited, as long as it can form an overflow space S1 and a fluid flow channel with the valve body 1. In this embodiment, the valve plate assembly 2 includes at least two elastic valve plates, all of which are sequentially attached along the axial direction. The specific number of elastic valve plates is not limited and can be adjusted according to the actual damping force requirements.

[0045] In order to enable the valve plate group 2 formed by stacking elastic valve plates to have elastic deformation capability, in this embodiment, the thickness and outer diameter of the elastic valve plates gradually increase or decrease along the axial direction. When the liquid pressure in the overflow space S1 is large enough, the valve plate group 2 can undergo elastic deformation in the direction away from the valve body 1, and a liquid flow channel can be formed between the valve body 1 and the valve plate group 2 to allow the liquid to flow out of the overflow space S1.

[0046] To adjust the magnitude of the damping force, the thickness, outer diameter, and stacking quantity of the elastic valve plates can be adjusted to create different flexural stiffnesses, thereby regulating the pressure of the fluid flowing through this area.

[0047] Based on the above structure, such as Figures 4 to 7 As shown, the control valve body includes a first control valve body 34 and a second control valve body 35 that are detachably connected. A mounting post 31 is connected to one of the first control valve body 34 and the second control valve body 35. The specific connection method between the first control valve body 34 and the second control valve body 35 is not limited. In this embodiment, one of the first control valve body 34 and the second control valve body 35 is provided with a plug-in post, and the other of the first control valve body 34 and the second control valve body 35 is provided with a plug-in hole. During assembly, the plug-in post is inserted into the plug-in hole, which can prevent the first control valve body 34 and the second control valve body 35 from moving relative to each other in the radial direction.

[0048] The first body 34 and the second body 35 of the control valve are processed separately and then assembled into the control valve body. This reduces the processing difficulty of the control valve body. The first body 34 and the second body 35 of the control valve can be processed using molds, eliminating machining steps, resulting in lower costs and higher processing efficiency.

[0049] The radial flow hole 33 is formed by: forming a first body groove 341 on the first body 34 of the control valve and forming a second body groove 351 on the second body 35 of the control valve. After assembly, the first body groove 341 and the second body groove 351 are aligned and together form the radial flow hole 33.

[0050] The specific shape of the radial flow orifice 33 is not limited. The radial flow orifice 33 is swallow-shaped, and the rate of change of the area of ​​the radial flow orifice 33 that is blocked gradually increases or decreases along the direction of movement of the control valve core 4. For example... Figure 4 As shown, the so-called "swallow shape" refers to the outline of a swallow's body, including a pointed head and a roughly trapezoidal body. When the control valve core 4 is in different positions, the damping force value corresponding to different flow areas is uniform.

[0051] The specific number of radial flow holes 33 is not limited. Simultaneously providing several radial flow holes 33 can increase the fluid flow rate and improve user comfort. In this embodiment, three radial flow holes 33 are provided on the side wall of the valve body groove 32. These three radial flow holes 33 are symmetrically arranged about the center of the valve body groove 32, resulting in a more uniform fluid flow distribution.

[0052] Based on the above structure, such as Figure 2 , Figure 5 and Figure 9 As shown, the mounting column 31 has a column through hole 36 axially inside, which connects to the valve body groove 32 through the column through hole 36 of the first body 34 of the control valve; the control valve core 4 has a valve core through hole 41 axially inside, and when the control valve core 4 moves along the axis, the liquid flow can flow in the valve core through hole 41.

[0053] The through-hole 36 of the column is connected to the through-hole 41 of the valve core, and the adjusting screw 51 is located on the extension line of the through-hole 41 of the valve core. When the damping force adjustment control accuracy or consistency is poor due to the machining accuracy of the spring 5, the machining tolerance of other parts, etc., a screwdriver can be inserted into the middle space of the through-hole 36, the through-hole 41 of the valve core, and the spring 5, and then the adjusting screw 51 can be tightened or loosened to adjust the length of the spring 5 after compression. The position of the control valve core 4 in the valve body groove 32 can be determined by the interaction of electromagnetic force and the rebound force of the spring 5. By adjusting the length of the spring 5 after compression, the position of the control valve core 4 can be adjusted, and the magnitude of the damping force can be adjusted accordingly to achieve more precise and consistent control.

[0054] After adjustment, use a spherical flow-blocking element 9 to block the through hole 36 of the column, which will not affect the flow of liquid and normal use of the solenoid valve.

[0055] Based on the above structure, such as Figure 8 and Figure 9 As shown, the control valve core 4 includes a valve core body 42 and a valve core column 43 connected together. A spring limiting groove 421 is provided at the free end of the valve core body 42, and a spring 5 (such as...) Figure 2 One end of the valve core (as shown) is inserted into the spring limiting groove 421. The valve core through hole 41 is connected to the spring limiting groove 421, and a stepped surface is formed between the valve core through hole 41 and the spring limiting groove 421. The end of the spring 5 abuts against the stepped surface, which limits the movement of the spring 5.

[0056] The valve core body 42 is inserted into the electromagnetic base 7 and can move relative to the electromagnetic base 7. The outer periphery of the valve core body 42 abuts against the inner wall surface of the electromagnetic base 7. When the control valve core 4 moves along the axis, the electromagnetic base 7 can guide the valve core body 42 to ensure that the control valve core 4 can move in a straight line.

[0057] like Figure 2 , Figure 5 and Figure 9 As shown, the control valve core 4 also includes a limiting ring 44, which is fixedly connected to the outer peripheral surface of the valve core column 43 via a radial connecting rib 45. In this embodiment, the limiting ring 44 and the valve core body 42 are respectively connected to both ends of the valve core column 43. The limiting ring 44 passes through the valve body groove 32, and can at least partially cover the connection hole between the valve body groove 32 and the radial flow hole 33. The diameter of the limiting ring 44 is basically equal to the diameter of the valve body groove 32, and the outer wall surface of the limiting ring 44 is basically in contact with the inner wall surface of the valve body groove 32. The valve body groove 32 can guide the movement path of the limiting ring 44.

[0058] Figure 10 The curve with the arrow in the middle shows the fluid flow path in this solenoid valve. Figure 2 and Figure 4 As shown, the liquid flowing out of the intermediate cylinder 300 enters the overflow space S1 through the valve flow passage 12. As the liquid pressure in the overflow space S1 increases, the valve plate assembly 2 gradually flexes and deforms. When the liquid pressure in the overflow space S1 is greater than the set value, the liquid flow channel between the valve body 1 and the valve plate assembly 2 opens, and the liquid flows out of the overflow space S1 through the liquid flow channel. The liquid flows into the valve body groove 32 through the radial flow hole 33 of the control valve body 3, and then enters the annular channel between the valve sleeve 6 and the valve seat 8 through the flow channel of the valve sleeve 6 and the electromagnetic base 7, and finally flows into the low-pressure area inside the outer cylinder 200.

[0059] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A switching solenoid valve, characterized in that, include: Valve body (1); The valve plate assembly (2) is attached to the end face of the valve body (1). An overflow space S1 is formed between the valve body (1) and the valve plate assembly (2). When the liquid pressure in the overflow space S1 is greater than the set value, a liquid flow channel can be formed between the valve body (1) and the valve plate assembly (2). The control valve body (3) includes a control valve main body and a mounting post (31). The valve body (1) and the valve plate group (2) are sequentially sleeved on the mounting post (31). The valve body (1), the valve plate group (2) and the control valve main body are sequentially fitted together. The control valve main body has a valve body groove (32) along the axial direction. A radial flow hole (33) is provided on the side wall of the valve body groove (32). The valve body groove (32) is connected to the radial flow hole (33). The control valve core (4) has one end inserted into the groove (32) of the valve body. When the control valve core (4) moves axially, it can at least partially block the radial flow hole (33). A spring (5) with one end abutting against the control valve core (4), the spring (5) and the control valve body (3) being located on opposite sides of the control valve core (4); The valve sleeve (6) is at least partially inserted into the valve body (1), the valve plate assembly (2) and the control valve body (3); An electromagnetic base (7) is sleeved on the outer periphery of a portion of the control valve core (4); and, The valve seat (8) is sleeved on the outside of the valve sleeve (6) and the electromagnetic base (7).

2. The solenoid valve according to claim 1, characterized in that, The control valve body includes a first control valve body (34) and a second control valve body (35), and the mounting post (31) is connected to one of the first control valve body (34) and the second control valve body (35).

3. The solenoid valve according to claim 2, characterized in that, The first body (34) and the second body (35) of the control valve are respectively provided with grooves. After assembly, the grooves on the first body (34) and the grooves on the second body (35) of the control valve are aligned and together form the radial flow hole (33).

4. The solenoid valve according to claim 1, characterized in that, The radial flow hole (33) is swallow-shaped. When the control valve core (4) moves to different positions, the flow area of ​​the radial flow hole (33) corresponds to a uniform damping force value.

5. The solenoid valve according to claim 1, characterized in that, The valve body groove (32) has three radial flow holes (33) on its side wall, and the three radial flow holes (33) are symmetrically arranged about the center of the valve body groove (32).

6. The solenoid valve according to any one of claims 1 to 5, characterized in that, The solenoid valve also includes an adjusting screw (51) that abuts against the other end of the spring (5); The mounting post (31) has an axial through hole (36) inside, which is connected to the valve body groove (32). A flow blocking element (9) is provided in the through hole (36). The control valve core (4) has an axial through hole (41) in it. The through hole (36) is connected to the valve core through hole (41). The adjusting screw (51) is located on the extension line of the valve core through hole (41).

7. The solenoid valve according to any one of claims 1 to 5, characterized in that, The valve body (1) includes a valve body portion (11), the edge of which protrudes axially to form a valve body flange (14), and the valve plate assembly (2) is attached to the valve body flange (14); a valve mounting through hole (13) for the mounting post (31) to pass through is provided in the middle of the valve body portion (11), and a valve flow through hole (12) for liquid flow is also provided on the valve body portion (11).

8. The solenoid valve according to any one of claims 1 to 5, characterized in that, The valve plate group (2) includes at least two elastic valve plates, and all the elastic valve plates are sequentially attached along the axial direction.

9. The solenoid valve according to any one of claims 1 to 5, characterized in that, The control valve core (4) includes a valve core body (42) and a valve core column (43) connected to each other. A spring limiting groove (421) is provided at the free end of the valve core body (42). A valve core through hole (41) is connected to the spring limiting groove (421). A stepped surface is formed between the valve core through hole (41) and the spring limiting groove (421) to abut against the end of the spring (5). The control valve core (4) also includes a limiting ring (44), which is fixedly connected to the outer circumferential surface of the valve core column (43) by a radial connecting rib (45), and the limiting ring (44) passes through the valve body groove (32).

10. A damping adjustment device, comprising an outer cylinder (200), an intermediate cylinder (300) passing through the outer cylinder (200), and a piston rod (400) passing through the intermediate cylinder (300), characterized in that, The damping adjustment device further includes a switching solenoid valve (100) as described in any one of claims 1 to 9. The outer cylinder (200) and the intermediate cylinder (300) are respectively provided with through holes. The valve seat (8) is fixedly connected to the through hole on the side of the outer cylinder (200). The valve body (1) is fixedly connected to the through hole on the side of the intermediate cylinder (300). When the piston rod (400) moves axially, the liquid flow in the intermediate cylinder (300) can enter the low-pressure area of ​​the outer cylinder (200) through the switching solenoid valve (100).

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