KR100644003B1 - Solenoid valve for automatic transmission - Google Patents

Abstract

A solenoid valve for an automatic transmission is provided to improve the product functionality by simplifying the flow of a working fluid and minimizing the surface resistance. A solenoid valve for an automatic transmission includes an upper body(1), a valve behavior body(2), a core(3), a plunger(4), a core support plate(6), a coil assembly(7), and a housing(8). The plunger has an annular frame on the upper surface formed to prevent the bottom surface of the core and the upper surface of the plunger from being stuck to each other by a fluid. The core support plate includes a plurality of blade pieces preventing separation of the core from the housing. The coil assembly has a bobbin, a coil, and a connection plug to operate the plunger. The housing includes a recess surrounding the exterior of the coil assembly and engaged with a core support plate.

Description

Solenoid valve for automatic transmission {Solenoid valve for automatic transmission}

1 to 2 is a perspective view and a cross-sectional view showing the structure of a conventional solenoid valve for automatic transmission.

Figure 3 is an exploded perspective view of a solenoid valve for an automatic transmission of the present invention.

Figure 4a is a cross-sectional view showing the structure of the solenoid valve for automatic transmission of the present invention while the valve is opened due to hydraulic pressure when the solenoid valve is not applied.

Figure 4b is a cross-sectional view showing the structure of the solenoid valve for automatic transmission of the present invention while the valve is closed due to electromagnetic force when the solenoid valve is applied.

Figure 5 is a front end perspective view showing the structure of the present invention solenoid valve for automatic transmission.

6A is an enlarged view of a portion “A-1” of FIG. 4A and FIG. 6B is an enlarged view of a portion “A-2” of FIG. 4B.

7a to 7b is a cross-sectional view showing the adjustment of the valve stroke by the combination of the upper body and the core which is the main part of the present invention.

8A is an enlarged view of a “B-1” portion in FIG. 4A, and FIG. 8B is an enlarged view of a “B-2” portion in FIG. 4B.

Figure 9 is an enlarged cross-sectional view showing a coupling structure of the housing and the core support plate which is the main portion of the present invention.

10 is a cross-sectional view showing an example of the outflow operation according to the supply of the mission oil when the power is not applied.

11 is a cross-sectional view showing an example of the operation of discharging the mission oil when the power is applied.

12 is a cross-sectional view showing a transfer loop of electromotive force in the present invention.

※ Explanation of code for main part of drawing ※

1: upper body 1-a: inlet 1-b: O-ring mounting groove

1-c: Body part 1-d: Outflow connection groove 1-e: Position adjusting groove

1-g: Multi-stage hole 1-f: Notch 1-h: Bottom contact surface

2: Valve operating body 2-a: Pintle 2-b: Upper contact surface

2-c: inclined plane 2-d: moving part 3: core

3-a: outlet 3-b: outlet 3-c: bottom surface

3-d: Assembly body 3-e: O-ring mounting groove 3-f: space part

3-g: through hole 3-h: slope 4: plunger

4-a: stone ring frame 4-b: multi-stage hole 4-c: top surface

6: core support plate 6-a: through hole 6-b: mounting groove

6-c: wing piece 7: coil assay 7-a: bobbin

7-b: Terminal 7-c: Coil 7-f: Connector plug

8 housing 8-a circumferential groove 8-b lower inner diameter

9a, 9b: O-ring

The present invention relates to a solenoid valve for an automatic transmission, and in particular, as oil is classified by pintle shape as the mission oil flows into the upper body, resistance is reduced and the surface resistance is reduced by simplifying the flow of the mission oil, inflow / outflow / Independent sealing of discharge section prevents mixing between supply oil and outflow oil and prevents vertical center deviation in the direction of product assembly and secures stability of assembly and magnetic properties. The present invention relates to a solenoid valve for an automatic transmission that can easily adjust the indentation displacement of the upper body in order to prevent the separation of the liver and minimize the valve stroke assembly deviation when the upper body is assembled to the core.

In general, solenoid valves are converters that convert electrical signals into mechanical signals, making them integral parts of factory automation and remote control. In particular, as the electronic control system occupies a high proportion of automobiles, many solenoid valves are used for electronic control of automobiles. Solenoid valves used in automobiles can be classified into ON-OFF solenoid valves and variable pressure solenoid valves according to their operation methods. Variable pressure solenoid valves are injectors in automobiles. It is used in various fields such as exhaust control system, power steering, active suspension and automatic transmission. In particular, the solenoid valve for vehicles is generally used for ultra high speed (response time of 3 or less), and is optimized for each purpose.

In addition, the ON / OFF solenoid valve is to apply a constant current to the coil of the solenoid valve so that the valve is opened or the valve is closed repeatedly while the plunger is operated. There is no type.

First, the solenoid valve is controlled by using the combined force of the magnetic force and the spring, that is, the spring repulsion force (when the valve is closed). The valve performance is caused by deviations depending on the spring conditions (elastic coefficient, time flow, assembly, etc.). There is a disadvantage in that the deviation (hydraulic pressure and flow rate characteristics) becomes large, and the type that controls the solenoid without a spring has a more stable to secure the performance of the solenoid valve because the inflow fluid pressure is directly transmitted to the control valve without attenuation by the spring. Magnetic performance and more precise quality of parts and assembly, such as more accurate strokes of valves, are required.

Thus, Korean Patent Registration No. 470082 has been proposed in view of the above-described conventional problems, and the structure of Korean Patent Registration No. 470082 relates to a conventional solenoid valve as shown in FIGS. 1 and 2, and its configuration is fluid. A core having an upper body 110 formed with an inlet 110a and an outlet 110b for guiding the flow, and a discharge hole 300a having a through hole formed in the center thereof and having an upper end thereof coupled to the upper body 110. 300, a rod body 120 disposed inside the through hole of the core 300 and sliding in the space portion of the core 300 to control the flow of the fluid, and a coil 500 generating the magnetic force is wound. It includes a bobbin 600 and a connector 180 provided with a terminal terminal connected to the mating connector, the upper body 110 is charged around the inlet (110a) to mitigate the impact of contact with the valve body The relief surface (110c) is configured to be made of the formation and the core 300, the reinforcing rib (110d) on a lower end thereof to prevent damage to the parts to be combined with the forming structure.

However, the above-mentioned patent registration No. 425514 is also accompanied by post-process quality problems and poor durability due to the flow path structure sensitive to the inflow fluid due to the shape of the rod body, unstable magnetic performance, excessive leakage characteristics, and incomplete fastening structure. Due to this, there are structural problems such as an increase in manufacturing cost and a decrease in work efficiency / productivity.

The present invention has been made to solve the problems of the prior art, the present invention firstly, the hydraulic load of the working fluid to reduce the flow path structure (pintle shape) and the flow of the working fluid to reduce the surface of the valve fluid and to reduce the surface resistance Minimization (outlet is formed in the core part) to improve product functionality (hydraulic pressure and flow rate performance), and secondly, after assembling the solenoid valve to the solenoid valve fixing device by forming a good flat surface of the valve contact surface and forming an independent seal between inlet, outlet, and outlet. Third, to prevent excessive leakage (liquid), thirdly, to reduce the manufacturing tolerances of the parts and improve the assembly stability, to maintain a constant magnetic force, to stabilize the magnetic characteristics, and fourth, to accurately adjust the valve stroke by adjusting the indentation displacement of the upper body Maintain the value to improve the performance of the product. Fifth, through the stable coupling structure of the components To ensure safety, and also, improve the productivity and quality requirements of a quality problem in a process, to prevent in advance and then provided to the solenoid valve of the high / low-cost, she is an object.

The object of the present invention is the solenoid valve for an automatic transmission, in which the inlet path for guiding the flow of the fluid is formed in the inner portion of the body formed a linkage groove formed in the "b" shape to connect the side and the bottom An extension part having an extended shape and integrally formed with the body, an upper body forming an O-ring insertion groove and a groove for adjusting a position when assembling the core; One end of the behavior portion is provided with a head portion integrally provided with a pintle portion for dividing (dispersing) the flow of the guided fluid, and the pintle lower end portion has a valve operating body having an inclined surface; The inner part of the space into which the upper body is inserted is formed with a stepped portion, and the side has an outlet formed smaller than the linkage groove, and the inner body of the lower body formed integrally with the assembly body provided with an inclined surface is formed so that the operation hole passes through A core having an outlet hole formed in communication with the upper end of the operating hole, and having an O-ring installation groove provided at an outer side in which the assembly body and the lower body are integrally connected; A plunger between the core bottom and the plunger upper surface having a plunger ring on the upper surface formed to prevent them from being fixed to each other by fluid; A core support plate formed on an outer circumferential surface of a disc shape having a through hole formed in a central portion thereof with a plurality of wing pieces for preventing a core from which a valve mover, a core, and a flanger are assembled, and an upper body coupled thereto; A coil assay having a bobbin, a coil and a connection plug for generating a magnetizing force for operating the plunger; It is achieved by a solenoid valve for an automatic transmission, characterized in that it comprises a housing surrounding the outside of the coil assay and having a coupling recess to which the core support plate is coupled.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 3 to 4 are a perspective view and a cross-sectional view showing a structure of a solenoid valve for an automatic transmission of the present invention, Figure 5 is a front perspective view showing a structure of the solenoid valve for an automatic transmission of the present invention according to the automatic transmission of the present invention Solenoid valve for the valve is the upper body (1) for regulating the supply of oil and the valve body (2) and plunger (4) linear movement by the electromagnetic force, the upper body (1) and the valve body (2), A core (3) for assembling or coupling the plunger (4) and for controlling the discharge and outflow of oil, a core support plate (6) for preventing the core (3) in which the parts are combined from being separated from the housing (8), It is roughly composed of a coil assay 7 for generating magnetic force to operate the plunger 4.

The upper body (1) forms a positioning groove (1-e) in the opening to correct the assembly position of the outlet-associated groove (1-d) and the core outlet (3-a) during assembly and the inlet (1-a) It has a multi-stage hole (1-g) that is in communication with the volume and expands, and forms an outlet connection groove (1-d) connected to the outlet (3-a) of the core (3) in the body portion (1-c) The outer circumferential surface has a notch or a similarly concave groove to implement a complete assembly when assembling the side caulking (A) with the core (3).

A separate O-ring installation groove (1-b) is formed between the inlet (1-a) and the outlet (3-a) to prevent leakage of mission oil and is formed at the tip of the inlet (1-a) opening. Positioning groove (1-e) specifically functions to correct the position with the core outlet (3-a), the structure of the outflow linkage groove (1-d) described in the present invention as an example for convenience in the present invention However, it can also be used to form other flow paths such as holes.

The valve actuating body 2 is primarily turned and the movable part 2-d formed integrally with the pintle 2-a so as to be smoothly behaved in the through-hole 3-g of the core 3 is formed. The pintle (2-a) formed in the upper end in order to minimize the resistance (load) of the mission oil flowing through the upper body (1) is slid to be sliding is a structure formed in a semicircular shape.

The upper contact surface 2-b of the valve body 2, in which the pintle 2-a is integrally formed, is formed in a flat surface, and the lower end portion is provided with an inclined surface 2-c so as to be integral with the behavior portion 2-d. The upper portion of the pintle (2-a) and the lower portion forming the moving portion (2-d) is formed integrally connected, but the connection portion is significantly smaller than the moving portion (2-d) Formed.

On the other hand, the core 3 is formed with at least one outlet (3-a) and the discharge hole (3-b), the upper end of the assembly body (3-d) is provided with a space in which the upper body 1 can be pressed ) And an inclined surface (3-h) having the same inclination as the inclined surface (2-c) of the valve actuator (2) at the tip of the through hole (3-g) in the center where the moving portion (2-d) is fitted Forming and having a separate O-ring installation groove (3-e) for preventing the leakage of the mission oil between the outlet (3-a) and the outlet (3-b).

Looking at the assembled state of the core 3 and the upper main body 1 in more detail as shown in the accompanying drawings, Figure 6 and 7 the upper portion inserted into the assembly body (3-d) of the core (3) The main body 1 is installed in a fitting form, and the upper surface 2-b and the lower surface of the upper body 1 in which the pintle 2-a of the valve body 2 is integrally inserted when the fitting is inserted. Press-fit installation by adjusting the distance to 1-h), ie valve stroke.

On the other hand, after the adjustment of the valve stroke (Valve stroke) is completed by applying an external force from the outside of the assembly body (3-d) can be combined once again so as not to be separated by the side caulking (A).

The center of the outlet linkage groove (1-d) and the outlet (3-a) is matched at the time of assembly by using the positioning groove (1-e) and the core discharge hole (3-b) of the upper body (1) It is not necessarily the center of the coincidence and the reason is that the circumferential width of the outlet-associated groove (1-d) is so large that it is satisfied if the outlet (3-a) is combined to be located in the outlet-associated groove (1-d) Because.

In addition, after inserting the valve body (2) into the core and caulking the plunger (4), in press-fitting the upper body (1) in the inner diameter of the core (3) in the press-fitting state while adjusting the displacement amount Through the side caulking process (A) it is also possible to improve the bondability by fixing the upper body (1) once more.

     In this case, as shown in FIG. 7, the valve stroke may be varied by the amount of displacement (target) set according to the amount of indentation of the upper body 1. The indentation adjustment is manually or automatically controlled by the assembly unit with the measurement, and it is desirable that both functions are carried out by mutual feedback at the same time. You can also improve the bonding by fixing once more.

Adjusting the valve stroke (Valve stroke) is to maintain the characteristics (hydraulic, flow rate) of the solenoid valve uniformly, the upper body (1) is the outflow connection groove (1-d) when assembling with the core (3) And the space portion 3-f are combined to form an extended space portion.

The structure of the plunger 4 has an upper surface to prevent them from adhering to each other by fluid upon contact with the lower surface 3-c of the core 3 as shown in the accompanying drawings, FIGS. 3 to 5 and 8. It is a structure having a multi-hole hole (4-b) having a dolhwante (4-a) in the center, the lower surface (3-c) and the upper surface of the plunger (4) of the core (3) A gap is formed between (4-c), which is called an air gap (Z).

On the other hand, the core support plate 6 which prevents the valve body 2, the core 3, and the plunger 4 from being assembled together and the core 3 composed of the upper body 1 coupled thereto is separated from the housing 8. 3 and 9, the through-hole 6-a is formed in the center in the form of a disk, and the plurality of wing pieces 6-c are formed on the outer circumferential surface thereof, and the mounting groove 6 is connected to the through-hole. -b) is provided.

 After assembling the four parts, the valve body 2, the core 3, and the plunger 4, first, the upper body 1 is formed into a structure that can be variably adjusted to a set valve stroke in order to press the upper body 1, The side caulking process is further formed in a parallel structure.

In addition, the air gap between the lower end surface 3-c of the core 3 and the upper end surface 4-c of the plunger 4 is maximum when it is not applied and, on the contrary, is the minimum when 100% duty is applied. The distance is called the residual air gap, and fixation by mission oil can also occur at this time. The narrow columnar annulus (4-a) of the upper surface (4-c) of the plunger (4), for example, the core (3) ) And the plunger (4) as close as possible (residual air gap), if the parts are too close or in contact with the valve due to sticking or valve response speed is adversely affected product characteristics. The plunger 4 is formed on the upper surface 4-c of the plunger 4 so that the oil adhesion occurrence height is set higher than the height of the circumferential frame 4-a so that the plunger 4 is fixed by oil adhesion (stenosis). It is a structure to prevent mechanically.

At this time, the height of the hwanhwante (4-a) is required to set the height so that the valve behavior is not affected by the oil adhesion.

In the above, when the valve stroke is "X" and the air gap is "Z" and the ring height is "Y" and the residual air gap is "Z '", when it is not authorized, X + Y≤Z must be made. Leakage can be prevented and X = 0 when applied, so that Y≤Z 'is made during the assembly process, so there is a mechanical gap above Y height, which can fundamentally prevent loss of functionality due to oil adhesion of the product.

On the other hand, there are two cases in which the valve malfunction requirement, X + Y> Z, is first: when the valve stroke (X) is larger than the other factors and when the height of the ring is larger than necessary (Z is always greater than Y). If the valve stroke (X) is large, the valve cannot be completely closed when the current is applied, so the inlet hole (1-a) is always open, so the lower contact surface (1-h) of the upper body (1) and the upper contact surface of the valve body (2) If there is a leakage between (2-b) and the oil flow cannot be adjusted accurately, and the height of the ring is too large than necessary, as shown in the electromotive force transmission loop of FIG. The gap between the upper surface of the launcher (4-c) is larger than necessary and the electromotive force is weakened, which may cause problems in product performance.

The structure of the coil assay 7 includes a bobbin 7-a and a terminal 7-b, a coil 7-c, and a connector plug 7-for generating a magnetomotive force for operating the plunger 4. f), the structure of the housing (8) has a circumferential groove (8-a) surrounding the outside of the coil assay (7) and the core support plate (6) is coupled to the lower center with a plunger The lower inner diameter part 8-b, which is a connecting passage through which the magnetic force passes, is integrally formed, and a gap generated between the lower inner diameter part 8-b of the housing and the plunger 4 in the drawing is formed in the side air gap ( Side air gap).

The core support plate 6 is made of a basic shape by using a general press method, and the outer blade part 6-c, which is assembled with the housing 8, is turned to reduce the manufacturing tolerances of the parts, and When assembling, the amount of vertical assembly eccentricity with the plunger 4 is also greatly reduced, so that the side air gap can be kept constant to ensure the stability of the magnetic characteristics, and at least one mounting groove (6-b) formed therein. It is characterized in that it is shaped to be used in parallel as the assembly mounting groove used for the combination of the processing mounting groove and the housing (8) used when collectively processing a plurality of parts.

The housing 8 has a deep inner press portion 8-b for forming a basic shape using a deep drawing press method and maintaining a side air gap with the plunger 4 during final assembly. Reamer or boring process can be applied to maintain the processing deviation and as shown in the accompanying drawings, the main groove (8-a) is the core support plate (6) is turned into an assembly with the core support plate (6) As with the wing piece 6-c of the outer diameter, the peripheral groove 8-a is also turned to secure the stability of the magnetic properties.

On the other hand, when the outer blade portion 6-c of the core support plate 6 is coupled to the circumferential groove 8-a of the housing 8 in which the coil assay 7 is assembled, the core support plate 6 is mounted. Rotational indentation of 90 degrees using the groove 6-b prevents the product from rotating and disassembling in the axial direction. In addition, side coking of the housing 8 and the core support plate 6 increases the bonding force. It may be.

Referring to the operation and effect of the present invention having the structure as described above as shown in Figure 4 and 10 the mission oil is supplied through the inlet (1-a) through the multi-stage hole (1-g) core When it flows into the space part 3-f of (3), it flows out through the outlet connection groove 1-d and the outlet port 3-a, and in this case, the power is not applied to the solenoid valve of the present invention. Should be doing.

As shown in FIG. 12, when magnetic parts are electromagnetized by the operation of the coil assay 7 to form magnetic force lines, the magnetic force lines generated in the magnetic parts after assembly flow uniformly. Stabilization is achieved, which leads to product quality stability.

In other words, the core support plate 6 is manufactured by using a general press method in consideration of the influence of manufacturing parts and assembly tolerances, and the outer contact surface is manufactured by external turning in consideration of its importance. Therefore, the contactability with the housing 8 and the assembly eccentricity with the plunger 4 are greatly reduced, so that the side air gap is kept constant.

When the power is cut off as described above and no electromotive force is generated, as shown in FIG. 4, the plunger 4 and the valve actuator 2 are moved downward, and the pintle of the valve actuator 2 is removed. A part of 2-a) is positioned to be led into the multi-stage hole 1-g.

Therefore, the mission oil supplied to the upper main body 1 is classified by the pintle (2-a) shape of the valve body 2 and the contact surface of the lower end of the upper main body 1 in the state where the resistance (load) is reduced. h) flows into the space portion 3-f of the core 3 between the upper contact surface 2-b of the valve operating body 2, that is, through the valve stroke X gap, and at the same time, the outlet-associated groove 1 out through the outlet (3-a) via -d).

In this case, as shown in FIG. 10, the flow direction of oil is switched in a state in which the resistance (load) is reduced while the mission oil is classified by the pintle (2-a) shape of the valve body 2. Looking at the pattern, the outlet of the core is located in the same direction as the flow path of the counterpart (not shown) in which the product is assembled, which simplifies the flow of mission oil and reduces the surface resistance, which ultimately results in the product's functional characteristics (flow / hydraulic). This is to be stabilized.

On the other hand, the O-ring (9-a) for preventing the leakage of the mission oil is controlled through the inlet (1-a) and the outlet (3-a) during the supply and discharge discharge of the mission oil and O-ring (9-b) is installed to prevent leakage of the mission oil controlled through the outlet (3-a) and the residual pressure discharged through the outlet (3-b), and independent sealing for each section. It is effective to prevent the mixing caused by the leakage of the supplied mission oil and the discharged, discharged mission oil by forming a structure.

When power is applied to the valve of the present invention operated as described above, an electromotive force is generated in the core assay 7 so that a magnetic force line is formed as shown in FIG. 12, and the plunger 4 is moved upward, and the plunger 4 The valve actuator 2 is also moved upwards by the movement of.

When the plunger 4 and the valve operating body 2 are moved upward as described above, as shown in FIG. 11, the valve body inclined surface 2-c is moved from the inclined surface 3-h of the core 3. As the upper side moves, the upper contact surface 2-b closes the multi-stage hole 1-g. The contact surfaces 2-b and 1-h of the valve operating body 2 and the upper body 1 have a wide processing width. It is advantageous to secure roughness and dimensional stability and has the advantage of improving wear resistance and durability.

On the other hand, when the valve stroke becomes "0" by the upper movement of the plunger 4 and the valve actuator 2, the inlet port 1-a is closed by the valve actuator 2 to remain in the outlet part. Mission oil is discharged through the discharge hole (3-b), when the contact surface, air gap, and side air gap of the gyro parts are stabilized, the magnetic force lines flow uniformly to improve the quality stability of the magnetic properties.

According to the present invention, the hydraulic load of the working fluid is reduced in the valve body, and thus the flow structure (pintle shape) and the flow of the working fluid are simplified and the surface resistance is minimized. Of the solenoid valve (liquidity) by improving product functionality and securing excellent flatness of the valve contact surfaces (2-b, 1-h) and forming independent seals between inlet, outlet, and outlet sections. To reduce the manufacturing tolerances and improve the assembly stability of the magnetic parts to maintain a constant magnetic force, to stabilize the magnetic characteristics, and to maintain the correct stroke value of the valve by adjusting the indentation amount of the upper body to ensure the assembly stability of the components. (Side caulking) and stable coupling structure to secure product safety and prevent quality problems in the post process in advance Improve over manufacturing costs, productivity and quality required by the effect of the high quality / low cost.

Claims (5)

In the solenoid valve for automatic transmission, It has a multi-stage hole in the inlet, and forms an outlet connection groove connected to the outlet of the core, the outer diameter body portion has a concave groove, a separate O- to prevent leakage of mission oil between the inlet and the outlet connection groove An upper body having a ring installation groove on an outer ring portion, and having a groove portion at the top thereof to correct a position with the core outlet port; The outer diameter of the opposite direction of the pintle is provided with one side grinding surface to form a sliding part so as to be primarily turned and smoothly behave in the through hole of the core, and to form a sliding part, and to minimize the mission oil resistance (load) introduced through the upper body. A valve operating body having a pintle shape, the pintle upper end forming a curved shape and having a contact surface in contact with the core having an inclined surface at a predetermined angle for a smooth flow of the fluid; One or more outlets and outlets are formed, and an upper diameter portion thereof has an inner diameter portion through which the upper body can be press-fitted, and a contact surface contacting the valve actuator body upon application is formed with an inclined surface at a predetermined angle for smooth flow of the fluid. A separate O-ring installation groove is provided on the outer ring to prevent leakage of mission oil between the outlets, and the inner diameter of the through hole through which the valve body can be moved is re-grinded to allow the valve body to behave smoothly. A core; A plunger having a plunger ring on an upper surface formed between the core bottom and the plunger upper surface to prevent them from being fixed to each other by a fluid; A disk-shaped core support plate having a plurality of wing pieces for preventing the core formed by coupling the valve body, the plunger and the upper body from being separated from the housing, and having through-holes formed in the center thereof; A coil assay having a bobbin, a coil and a connector plug to operate the plunger; A solenoid valve for an automatic transmission, characterized in that it comprises a housing surrounding the outside of the coil assay and having a recess to which the core support plate is coupled.  The solenoid valve for an automatic transmission according to claim 1, wherein the upper main body is fitted into the core space into which the upper main body is inserted. The solenoid valve for an automatic transmission according to claim 1, wherein a side caulking coupling is configured to improve coupling stability by applying external force from the outside of the core. The solenoid valve for an automatic transmission according to claim 1, wherein the upper body is assembled while adjusting the valve stroke through an indentation displacement of the upper body when the upper body is assembled into the core.  The solenoid valve according to claim 1, wherein the core support plate is fitted into the housing circumferential groove and then side-coated by external force from the outside of the housing assembly body after rotation coupling.

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