Solenoid valve

Abstract

A solenoid valve is provided with: a flow path; a valve body disposed in the flow path and configured to change a flow rate of the flow path by driving of the solenoid; a port connected to the flow path; a protrusion protruding from the circumferential surface of the nozzle; and a band-shaped filter attached in the circumferential direction of the nozzle and comprising a large-width portion located on one side in the longitudinal direction and a small-width portion located on the other side in the longitudinal direction. The filter is provided with: a first hole which is located at the center in the longitudinal direction and into which the protrusion is inserted; the punching part is arranged on the large-width part and is opposite to the port; a slit provided at one end on one side in the longitudinal direction and extending in the width direction of the filter; a folded-back part which is inserted into the slit and which is folded back in the direction opposite to the insertion direction in a state in which the folded-back part is in contact with the slit; and a second hole portion provided at the other end portion on the other side in the longitudinal direction. The protrusion is inserted into the second hole portion that passes through the slit, and the second hole portion is fixed to the protrusion.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electromagnetic valve. BACKGROUND

[0002] The electromagnetic valve has a nozzle in a cylindrical shape on one side of the axial direction of a solenoid. In this electromagnetic valve, there are provided a flow path, a spool disposed in the flow path and changing the flow rate of the flow path by driving of the solenoid, a port connected to the flow path, and a filter in a band shape installed by being wound along the circumference of the nozzle in which the port is disposed (Patent Literature 1). By providing the filter at the port, foreign matter contained in the working oil can not flow into a hydraulic control valve through the port during inflow into the electromagnetic valve.

[0003] In Patent Literature 1, a structure is described in which, when the filter is wound around the outer circumferential surface of the nozzle and fixed thereto, a projection provided at one end in the longitudinal direction of the filter is hooked to the other end, and the filter is installed by the elastic force of the filter itself.

[0004] In Patent Literature 2, a structure is described in which, after the filter is wound around the outer circumferential surface of the nozzle, a projection provided at the other end is hooked to a slit provided at one end in the longitudinal direction of the filter, and thereby fixed.

[0005] PRIOR ART DOCUMENTS

[0006] PATENT LITERATURE

[0007] Patent Literature 1: Japanese Patent Application Publication No. 2007-162765

[0008] Patent Literature 2: Japanese Patent Application Publication No. 2007-205465 SUMMARY

[0009] In the above-described electromagnetic valve, after the filter is wound around the outer circumferential surface of the nozzle, the installation work of hooking and fixing one end and the other end in the longitudinal direction of the filter becomes complicated.

[0010] One of the objects of one aspect of the utility model is to provide an electromagnetic valve that can make the installation operability of the filter good.

[0011] The electromagnetic valve according to an embodiment of the present application has a nozzle in a cylindrical shape on one side in the axial direction of a solenoid. The electromagnetic valve includes: a flow path; a valve core disposed in the flow path and configured to change the flow rate of the flow path by driving the solenoid; a port connected to the flow path; a protrusion protruding from the circumferential surface of the nozzle; and a filter in a band shape mounted along the circumferential direction of the nozzle and configured by a wide-width portion on one side in the longitudinal direction and a narrow-width portion on the other side in the longitudinal direction. The filter includes: a first hole portion in the center in the longitudinal direction and configured to allow the protrusion to be inserted; a punched hole portion provided in the wide-width portion and opposed to the port; a slit provided in one end portion on one side in the longitudinal direction and extending in the width direction of the filter; a folded-back portion inserted into the slit and folded back in a direction opposite to the insertion direction in a state of being in contact with the slit; and a second hole portion provided in the other end portion on the other side in the longitudinal direction. The second hole portion is inserted by the protrusion and fixed to the protrusion.

[0012] In one embodiment of the electromagnetic valve of the present application, the first hole portion is in a shape connecting the large-diameter portion and the small-diameter portion.

[0013] In one embodiment of the electromagnetic valve of the present application, the second hole portion is in a long-hole shape extending in the longitudinal direction.

[0014] In one embodiment of the electromagnetic valve of the present application, another punched hole portion is provided in the narrow-width portion between the first hole portion and the second hole portion.

[0015] In one embodiment of the electromagnetic valve of the present application, the nozzle has a recess on the circumferential surface into which the protrusion is inserted and fixed.

[0016] According to one aspect of the present application, an electromagnetic valve capable of stably supplying fluid to a plurality of bearings can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a perspective view showing an electromagnetic valve according to an embodiment of the present application, and is a view showing a state in which a filter is mounted on a nozzle portion.

[0018] Figure 2 FIG. 2 is a sectional view showing the electromagnetic valve according to the embodiment of the present application, and is a view showing a state in which the filter is mounted on the nozzle portion.

[0019] Figure 3 FIG. 3 is a plan view showing a structure of the filter before being mounted on the nozzle portion according to the embodiment of the present application.

[0020] Figure 4 FIG. 4 is a view showing an unfolded state before the filter is mounted on the nozzle portion according to the embodiment of the present application.

[0021] Figure 5 is a side view showing a state after a filter is installed on the nozzle portion of the present embodiment.

[0022] Figure 6 is a side view showing a state after a filter is installed on the nozzle portion of the present embodiment.

[0023] Figure 7 is an enlarged sectional view showing a fixed state of the filter of the present embodiment along the VII-VII line of Figure 6

[0024] Figure 8 is a sectional view from an axial direction showing a method of installing the filter of the present embodiment.

[0025] Figure 9 is a view from the IV of Figure 8 is a main part plan view showing a recess of the nozzle portion of the present embodiment and a rivet. DETAILED DESCRIPTION

[0026] Hereinafter, an electromagnetic valve of an embodiment of the present application will be described with reference to the drawings. In the following description, the electromagnetic valve 1 according to the present embodiment is described with reference to the positional relationship when the electromagnetic valve 1 is installed in a vehicle not shown that is positioned on a horizontal road surface, and the upward and downward directions are defined.

[0027] In the following description, a direction parallel to the Z axis appropriately shown in each drawing is defined as the upward and downward direction. The positive side of the Z axis is the upper side, and the negative side of the Z axis is the lower side. An imaginary axis, i.e., the center axis J, appropriately shown in each drawing extends in a direction parallel to the Z axis direction, i.e., the upward and downward direction. In the following description, a direction parallel to the axial direction of the center axis J is simply referred to as the "axial direction". In addition, unless otherwise specified, a radial direction with the center axis J as the center is simply referred to as the "radial direction", and a circumferential direction with the center axis J as the center is simply referred to as the "circumferential direction". In addition, a direction orthogonal to the axial direction and parallel to the X axis appropriately shown in each drawing is referred to as the "width direction", and a direction orthogonal to the axial direction and parallel to the Y axis appropriately shown in each drawing is referred to as the "protruding direction Y". The width direction X and the protruding direction Y are directions orthogonal to each other.

[0028] In the present embodiment, the lower side corresponds to the "one side in the axial direction", and the upper side corresponds to the "other side in the axial direction". In addition, the upward and downward direction, the protruding direction, the width direction, the upper side, and the lower side are merely names for describing the relative positional relationship of each portion, and the actual arrangement relationship and the like can be an arrangement relationship and the like other than the arrangement relationship and the like shown by these names.

[0029] Figure 1 is a perspective view of the electromagnetic valve 1 of an embodiment. Figure 2 is a sectional view of the electromagnetic valve 1.​

[0030] The electromagnetic valve 1 of the present embodiment has a solenoid portion 20, a cylindrical nozzle portion 30 provided on the axial one side of the solenoid portion 20, and a filter 40 mounted along the circumferential direction of the nozzle portion 30.

[0031] Solenoid portion

[0032] As shown in Figs. 1 and 2, the solenoid portion 20 of the present embodiment includes a bobbin 21, a coil 22, a terminal 23, a guide member 24, a housing 25, a movable member 26, and an elastic member 27. Figure 1 Figure 2 As shown in Figs. 1 and 2, the solenoid portion 20 of the present embodiment includes a bobbin 21, a coil 22, a terminal 23, a guide member 24, a housing 25, a movable member 26, and an elastic member 27.

[0033] The bobbin 21 is cylindrical and surrounds the center axis J. The bobbin 21 is, for example, a cylindrical shape that is centered on the center axis J and open on both axial sides. The coil 22 is wound around the bobbin 21. In the present embodiment, the bobbin 21 is made of resin. The bobbin 21 has a bobbin main body portion 211, an upper flange portion 212, a lower flange portion 213, and a terminal holding portion 214.

[0034] The bobbin main body portion 211 is cylindrical and has the coil 22 wound therearound. The bobbin main body portion 211 is, for example, a cylindrical shape that is centered on the center axis J and open on both axial sides. On the outer peripheral surface of the bobbin main body portion 211, a plurality of grooves extending in the circumferential direction are arranged in the axial direction. The coil wire constituting the coil 22 is wound along the grooves.

[0035] The upper flange portion 212 protrudes radially outward from the portion of the bobbin main body portion 211 on the upper side than the coil 22. In the present embodiment, the upper flange portion 212 protrudes radially outward from the end portion on the upper side of the bobbin main body portion 211. The upper flange portion 212 is, for example, a circular ring shape centered on the center axis J. The upper flange portion 212 is, for example, a plate shape with the plate surface facing in the axial direction.

[0036] The lower flange portion 213 protrudes radially outward from the portion of the bobbin main body portion 211 on the lower side than the coil 22. In the present embodiment, the lower flange portion 213 protrudes radially outward from the end portion on the lower side of the bobbin main body portion 211. The lower flange portion 213 is, for example, a ring shape centered on the center axis J. The lower flange portion 213 is, for example, a plate shape with the plate surface facing in the axial direction.

[0037] The terminal holding portion 214 protrudes from the portion of the radially outer edge portion of the upper flange portion 212 on the other side (+Y side) of the protruding direction Y to the other side of the protruding direction Y. As shown in Fig. 2, the terminal holding portion 214 has a base portion 214a. The base portion 214a is, for example, a cuboid shape. A portion of the terminal 23 is inserted and held in the base portion 214a. Thus, the terminal holding portion 214 holds the terminal 23. Figure 1 ​​

[0038] The coil 22 is wound around a center axis J extending in the axial direction. In the present embodiment, the coil 22 is wound on the outer peripheral surface of the bobbin main body portion 211 of the bobbin 21. The coil 22 is, for example, a cylindrical shape open on both sides in the axial direction with the center axis J as the center. The outer peripheral surface of the coil 22 is positioned at a position radially inward of the radially outer edge portion of the upper flange portion 212 and the radially outer edge portion of the lower flange portion 213. Although not shown, the end portions of the coil wire constituting the coil 22 are drawn out from the coil 22. The drawn-out end portions of the coil wire are connected to the coil wire holding portions (not shown) of the terminal 23.

[0039] As shown in Figure 1 In the present embodiment, a pair of terminals 23 is arranged in the width direction X. The pair of terminals 23 has a shape symmetrical to each other in the width direction X. The pair of terminals 23 is held to the terminal holding portions 214 of the bobbin 21, respectively. The terminal 23 is made of metal. The terminal 23 is made, for example, by performing press working on a plate-shaped metal member. Each terminal 23 has a base portion 231, a connection terminal portion 232, and a coil wire holding portion (not shown).

[0040] As shown in Figure 2 The base portion 231 extends in the protruding direction Y. The connection terminal portion 232 extends upward from the end portion of the base portion 231 on the other side in the protruding direction Y. The coil wire holding portion is connected to the portion of the base portion 231 protruding from the terminal holding portion 214. The coil wire holding portion is disposed on the opposite side to the side where the other terminal 23 is positioned, with respect to the base portion 231, in the width direction X. The coil wire holding portion holds the end portion of the coil wire not shown drawn out from the coil 22. The coil wire holding portion and the end portion of the coil wire are joined, for example, by laser welding or the like. By connecting the coil wire holding portion and the end portion of the coil wire, the terminal 23 is electrically connected to the coil 22.

[0041] The connection terminal portion 232 is exposed inside the connector portion not shown. The connector portion is connected to an external power source not shown. The external power source connected to the connector portion is electrically connected to the connection terminal portion 232. Thus, electric current flows from the external power source to the coil 22 via the terminal 23, and the solenoid valve 1 is supplied with power.

[0042] In the above description, the terminal 23 is mounted on the bobbin 21 after the bobbin 21 is made of resin, but it is not limited thereto. The bobbin 21 can be made, for example, by insert molding with the terminal 23 as an insert member.

[0043] The guide member 24 is a cylindrical member extending in the axial direction. As shown in Figure 2As shown, the guide member 24 is inserted into the bobbin 21 from the lower side. In the present embodiment, the guide member 24 is a single member. The guide member 24 is formed, for example, by die casting or the like. The guide member 24 is made of a magnetic material. The guide member 24 has a guide cylinder portion 241 and a ring portion 242. Thus, the solenoid portion 20 of the electromagnetic valve 1 is provided with the guide cylinder portion 241 and the ring portion 242. In the present embodiment, the guide member 24 is a single member, and thus the guide cylinder portion 241 and the ring portion 242 are integrally formed. In addition, since the guide member 24 is a single member made of a magnetic material, the guide cylinder portion 241 and the ring portion 242 are also made of a magnetic material.

[0044] The guide cylinder portion 241 is in a cylindrical shape extending in the axial direction. The guide cylinder portion 241 is, for example, a cylindrical shape centered on the center axis J and open on both sides in the axial direction. The guide cylinder portion 241 is inserted into the radially inner side of the bobbin 21. In the present embodiment, the guide cylinder portion 241 is fitted into the radially inner side of the bobbin 21. In more detail, the guide cylinder portion 241 is fitted into the radially inner side of the lower side portion of the bobbin main body portion 211. The guide cylinder portion 241 surrounds the movable member 26 on the radially inner side of the bobbin 21. The guide cylinder portion 241 is located on the radially inner side of the coil 22. The guide cylinder portion 241 surrounds the movable member 26 on the radially inner side of the coil 22.

[0045] The ring portion 242 is located at a position on the lower side of the coil 22. The ring portion 242 surrounds the center axis J. As shown, the ring portion 242 is, for example, a substantially circular ring shape centered on the center axis J. The ring portion 242 supports the movable member 26 so as to be movable in the axial direction. The guide member 24 can move the movable member 26 in the axial direction by the elastic member 27. The ring portion 242 is in contact with the upper side end surface of the later-described pin 262 of the movable member 26. Figure 1

[0046] Figure 1 Figure 2 As shown, the housing 25 houses the bobbin 21 and the coil 22 inside. The housing 25 is made of a magnetic material. The housing 25 is, for example, a single member. The housing 25 has a housing main body portion 251, a core portion 252, and a nozzle holding portion 253.

[0047] ​​​The housing body 251 is cylindrical, extending axially and surrounding the central axis J. For example, the housing body 251 is a cylinder with an opening at the bottom centered on the central axis J. The housing body 251 has a cover 251a, a cylindrical portion 251b, and a support portion 251c. Thus, the housing 25 has a cover 251a, a cylindrical portion 251b, and a support portion 251c. Furthermore, the solenoid portion 20 of the solenoid valve 1 also has a cover 251a, a cylindrical portion 251b, and a support portion 251c. Since the housing 25 is a single component made of a magnetic material, the cover 251a, the cylindrical portion 251b, and the core portion 252 are also made of a magnetic material.

[0048] The cover portion 251a is located on the upper side of the coil 22. The cover portion 251a is, for example, a circular plate centered on the central axis J. The cover portion 251a covers the entire upper side of the winding tube 21. The cover portion 251a blocks the opening on the upper side of the winding tube 21. The cover portion 251a is, for example, disposed on the upper side of the upper end face of the winding tube 21 with a gap. In this embodiment, the cover portion 251a corresponds to the "second magnetic body portion" located on the upper side of the coil 22.

[0049] The cylindrical portion 251b extends downward from the radially outer edge of the cover portion 251a. The cylindrical portion 251b is, for example, a cylinder with an opening at its lower side centered on the central axis J. The cylindrical portion 251b surrounds the coil 22. The cylindrical portion 251b surrounds the coil 22 radially outward. For example, a small gap is provided between the inner circumferential surface of the cylindrical portion 251b and the outer circumferential surface of the coil 22. That is, in this embodiment, the annular portion 242 is located radially inward of the cylindrical portion 251b.

[0050] like Figure 1 and Figure 2 As shown, the cylindrical portion 251b has a hole 251d that radially penetrates the wall of the cylindrical portion 251b. The hole 251d is provided on the portion of the cylindrical portion 251b located on the other side (+Y side) in the protruding direction Y. The hole 251d is open, for example, on the upper side. The hole 251d is generally rectangular when viewed in the protruding direction Y. The base of the connector portion (not shown) and the terminal holding portion 214 of the winding tube 21 pass through the hole 251d in the protruding direction Y.

[0051] The support portion 251c protrudes radially inward from the lower end of the cylindrical portion 251b. The support portion 251c is annular when viewed axially. The support portion 251c is plate-shaped with its plate surface facing axially. The support portion 251c extends circumferentially. The support portion 251c contacts the lower flange portion 213 of the winding tube 21 from below. A guide member 24 is disposed radially inward on the support portion 251c.

[0052] like Figure 2As shown, the core portion 252 has an externally threaded portion 252a on the one end side in the axial direction. The core portion 252 is fixed by screwing the externally threaded portion 252a to the cap portion 251a from the lower side. The core portion 252 protrudes downward from the cap portion 251a. The core portion 252 is, for example, cylindrical with the center axis J as the center. The core portion 252 is located on the radially inner side of the cylindrical portion 251b. The core portion 252 is inserted into the radially inner side of the bobbin 21 from the upper side. The core portion 252 is located in the upper side portion in the inside of the bobbin 21. A minute gap is provided, for example, between the outer peripheral surface of the core portion 252 and the inner peripheral surface of the bobbin 21. The lower end portion of the core portion 252 is configured to be apart upward from the end portion of the guide cylindrical portion 241 on the upper side.

[0053] As shown in FIG. 1, the movable member 26 extends in the axial direction in the present embodiment. The movable member 26 is, for example, pin-shaped with the center axis J as the center. The movable member 26 is disposed in the upper side portion in the inside of the nozzle portion 30. The movable member 26 is configured to be axially movable by the ring-shaped portion 242 of the guide member 24. In the present embodiment, the movable member 26 has a movable member body 261 and a pin 262. At least a portion of the movable member 26 is made of a magnetic body. In the present embodiment, only a portion of the movable member 26 is made of a magnetic body. In the present embodiment, the movable member body 261 is made of a magnetic body, and the pin 262 is made of a non-magnetic body. Figure 2 The movable member body 261 is columnar extending in the axial direction, and has a larger diameter than the pin 262. The outer diameter of the movable member body 261 coincides with the inner diameter of the flow path of the upper side portion in the inside of the nozzle portion 30. The movable member body 261 is liquid-tightly embedded in the radially inner side of the flow path of the upper side portion in the inside of the nozzle portion 30. The movable member body 261 is supported by the ring-shaped portion 242 of the guide member 24 so as to be axially movable. The end portion on the upper side of the movable member body 261 is in contact with the lower side surface of the ring-shaped portion 242.

[0054] The pin 262 is columnar extending in the axial direction. The pin 262 is, for example, cylindrical with the center axis J as the center. The pin 262 is integrally fixed to the lower side of the movable member body 261. Alternatively, the movable member body 261 and the pin 262 can be separate bodies, and the method of fixing them is not particularly limited.

[0055] The pin 262 extends to the lower side of the movable member body 261. The lower side portion of the pin 262 is inserted into the upper side portion in the inside of the nozzle portion 30. In the present embodiment, the lower side portion of the pin 262 is located in the second flow path 34. The lower end surface on the lower side of the pin 262 is capable of contacting the valve core 38 described later of the valve portion 32 from the upper side.

[0056]

[0057] ​The elastic member 27 is located axially between the guide member 24 and the core 252. The elastic member 27 is, for example, a helical spring extending axially. In this embodiment, the elastic member 27 is located inside the guide member 24. The lower end of the elastic member 27 contacts the upper end face of the annular portion 242 of the guide member 24. The upper end of the elastic member 27 contacts the lower end face of the core 252. The elastic member 27 applies a downward elastic force to the movable member 26.

[0058] <Nozzle Section>

[0059] like Figure 1 and Figure 2 As shown, the nozzle portion 30 is the part that holds the valve portion 32. The nozzle portion 30 is located below the solenoid portion 20. The nozzle portion 30 extends axially. The nozzle portion 30 has a nozzle body 31, a valve portion 32, and a fixing portion 36. The nozzle body 31 is cylindrical around a central axis J. For example, the nozzle body 31 is cylindrical with the central axis J as its center. A circumferential groove-shaped recess 30f is formed in the nozzle body 31 between the valve portion 32 and the fixing portion 36 in the axial direction.

[0060] The nozzle section 30 has an opening on its lower side. The nozzle section 30 has an input port 30a, an output port 30b, and a discharge port 30c. The input port 30a is the opening on the lower side of the nozzle section 30.

[0061] The output port 30b extends through the wall of the nozzle portion 30 from the inner circumferential surface to the outer circumferential surface in the width direction X. A pair of output ports 30b are provided, for example, in the width direction X, separated by the central axis J.

[0062] The discharge port 30c is located above the discharge port 30b. The discharge port 30c extends through the wall of the nozzle portion 30 from the inner to the outer circumferential surface in the width direction X, for example. The output port 30b and the discharge port 30c are connected by a connecting port 30g. For example, when viewed in the width direction X, the discharge port 30c extends in the projection direction Y. A pair of discharge ports 30c are provided, for example, in the width direction X, sandwiching a central axis J. The pair of discharge ports 30c, 30c are arranged radially in a straight line.

[0063] The nozzle portion 30 has a first flow path 33 and a second flow path 34 as flow paths opened and closed by the valve portion 32. The inside of the first flow path 33 and the inside of the second flow path 34 are constituted by the inside of the nozzle portion 30. The first flow path 33 extends from the input port 30a to the output port 30b. The first flow path 33 is a flow path that connects an inflow flow path not shown that is connected to the input port 30a and an outflow flow path not shown that is connected to the output port 30b. The second flow path 34 extends from the output port 30b to the discharge port 30c. The second flow path 34 is a flow path that connects the outflow flow path not shown that is connected to the output port 30b and a discharge flow path not shown that is connected to the discharge port 30c.

[0064] The fixed portion 36 is provided at the upper end portion of the nozzle main body 31. The fixed portion 36 is provided integrally on the nozzle main body 31 and protrudes to the radially outer side. The fixed portion 36 is fixed to the lower end portion of the cylindrical portion 251b of the housing case 25. The outer diameter of the fixed portion 36 as viewed in the axial direction is circular. The fixed portion 36 has, for example, a through-hole 36a that is centered on the center axis J and extends in the axial direction. The through-hole 36a communicates with the second flow path 34 and is open at the upper end. In the through-hole 36a, the movable member main body 261 of the movable member 26 is provided so as to be movable in the axial direction. The inner diameter of the through-hole 36a is the same as the outer diameter of the movable member main body 261. The upper end of the movable member main body 261 can protrude upward from the opening on the upper side of the through-hole 36a. The lower surface of the guide member 24 that moves downward due to the elastic force of the elastic member 27 contacts the upper end of the fixed portion 36.

[0065] A recessed portion 300 (see Fig. 6) recessed to the radially inner side is formed on the outer peripheral surface 31a of the nozzle main body 31 at the position of the recessed portion 30f. Figure 7 and Figure 8 The recessed portion 300 is circular as viewed in the radial direction. The recessed portion 300 is provided at the same axial position as the discharge port 30c. In the present embodiment, the recessed portion 300 is one in the circumferential direction. The recessed portion 300 is disposed at a position that is offset in the circumferential direction with respect to the discharge port 30c, that is, a position that is offset in the circumferential direction from the discharge port 30c in a direction orthogonal to the axial direction. The rivet 39 (protrusion) is embedded and fixed to the recessed portion 300. The rivet 39 protrudes to the radially outer side from the outer peripheral surface 31a of the nozzle main body 31. The protruding front end 39a of the rivet 39 is fixed to the filter 40 by heat staking.

[0066] As Figure 9As shown, the rivet 39 has a shaft portion 391 and a bulge portion 392 in its cross-sectional shape within the recess 300 before hot riveting. The outer diameter of the shaft portion 391 is smaller than the inner diameter of the recess 300. The bulge portion 392 protrudes outward from the outer periphery of the shaft portion 391. The bulge portion 392 is approximately semi-circular. A plurality of (three in this embodiment) bulge portions 392 are arranged at a constant spacing in the circumferential direction of the shaft portion 391. The protruding ends of the bulge portions 392 contact the inner surface of the recess 300. The rivet 39 is pressed into the recess 300.

[0067] When the rivet 39 is being hot-riveted, the molten rivet 39 is embedded in the recess 300. Therefore, the shapes of the shaft portion 391 and the bulge portion 392 before the hot riveting are not maintained.

[0068] like Figure 2 As shown, the valve portion 32 is disposed in the portion between the inlet port 30a and the outlet port 30c of the nozzle body 31 in the axial direction. The valve portion 32 protrudes radially outward from the outer periphery of the nozzle body 31.

[0069] The nozzle portion 30 has annular grooves 30d and 30e on its outer peripheral surface. The annular grooves 30d and 30e are, for example, annularly centered on the central axis J. The annular groove 30d is provided on the outer peripheral surface of the portion of the nozzle portion 30 located axially between the output port 30b and the discharge port 30c. The annular groove 30e is provided on the outer peripheral surface of the portion of the nozzle portion 30 located lower than the output port 30b. Annular O-rings 35 are embedded in both the annular grooves 30d and 30e.

[0070] The valve portion 32 is located below the movable member 26. In this embodiment, the valve portion 32 is held in the central portion of the axial direction inside the nozzle portion 30. The valve portion 32 overlaps with the output port 30b when viewed in the width direction X, for example. A portion of the valve portion 32 is embedded in the nozzle portion 30 and held therein. The valve portion 32 has a valve chamber 37 and a valve core 38.

[0071] Valve chamber 37 houses valve core 38. Valve chamber 37 forms part of first flow path 33 and part of second flow path 34. Valve chamber 37 has an inlet port connection hole 37a, an outlet port connection hole 37b, and a discharge port connection hole 37c. The inlet port connection hole 37a is located on the lower wall of valve chamber 37. The inlet port connection hole 37a connects the interior of valve chamber 37 to inlet port 30a. A lower valve seat portion 371 is provided at the upper end of inlet port connection hole 37a, where valve core 38 can sit.

[0072] Output port connection holes 37b are provided, for example, on the walls of both sides protruding in the Y direction within the valve chamber 37. Output port connection holes 37b can connect the interior of the valve chamber 37 to the output port 30b.

[0073] The discharge port connecting hole 37c is provided to the wall portion on the upper side in the valve chamber 37. The discharge port connecting hole 37c is capable of connecting the inside of the valve chamber 37 with the discharge port 30c. An upper side valve seat portion 372 in which the spool 38 is capable of seating is provided to the lower side end portion of the discharge port connecting hole 37c. The pin 262 of the movable member 26 is inserted into the discharge port connecting hole 37c from the upper side.

[0074] The spool 38 is configured to be movable in the axial direction within the valve chamber 37. The spool 38 changes the flow rate of the flow path within the nozzle portion 30 by the drive of the solenoid portion 20. The spool 38 is, for example, a sphere or a cylinder extending in the width direction X. The spool 38 is switched between a state in which it seats on the lower side valve seat portion 371 from the upper side and a state in which it seats on the upper side valve seat portion 372 from the lower side. As shown in FIG. 2, in the state in which the spool 38 seats on the upper side valve seat portion 372, the input port connecting hole 37a becomes an open state, and the input port 30a and the output port 30b are connected via the inside of the valve chamber 37. Thereby, the valve portion 32 becomes an open state, and the first flow path 33 becomes an open state, allowing fluid to flow from the input port 30a to the output port 30b. In the state in which the spool 38 seats on the upper side valve seat portion 372, the discharge port connecting hole 37c is plugged by the spool 38. Thereby, the second flow path 34 becomes a cut-off state, and fluid is prevented from flowing from the output port 30b to the discharge port 30c. Figure 2

[0075] On the other hand, as shown in FIG. 3, in the state in which the spool 38 seats on the lower side valve seat portion 371, the input port connecting hole 37a becomes a plugged state, and the input port 30a and the output port 30b are cut off. Thereby, the valve portion 32 becomes a closed state, and the first flow path 33 becomes a cut-off state, and fluid is prevented from flowing from the input port 30a to the output port 30b. In the state in which the spool 38 seats on the lower side valve seat portion 371, the discharge port connecting hole 37c becomes an open state, and the output port 30b and the discharge port 30c are connected via the inside of the valve chamber 37. Thereby, the second flow path 34 becomes an open state, and fluid is allowed to flow from the output port 302b to the discharge port 30c. Figure 2

[0076] As described above, the first flow path 33 and the second flow path 34 are switched to be cut off and open by the valve portion 32. The open and closed state of the valve portion 32 is switched by the movable member 26. In the state in which no electric power is supplied to the electromagnetic valve 1, as shown in FIG. 2, the spool 38 is seated on the upper side valve seat portion 372 from the upper side, and the input port 30a and the output port 30b are connected via the inside of the valve chamber 37. Thereby, the valve portion 32 becomes an open state, and the first flow path 33 becomes an open state, and fluid is allowed to flow from the input port 30a to the output port 30b. In the state in which no electric power is supplied to the electromagnetic valve 1, the discharge port connecting hole 37c is plugged by the spool 38. Thereby, the second flow path 34 becomes a cut-off state, and fluid is prevented from flowing from the output port 30b to the discharge port 30c. Figure 2 ​​As shown, the movable member 26 is urged downward by the elastic force of the elastic member 27, and the front end portion of the pin 262 of the movable member 26 presses the spool 38 from above against the lower valve seat portion 371. Thus, in a state where no electric power is supplied to the electromagnetic valve 1, the valve portion 32 is closed, and the first flow passage 33 is in a cut-off state. In addition, in a state where no electric power is supplied to the electromagnetic valve 1 and the valve portion 32 is closed, the upper end surface of the movable member 26 is located below and separated from the lower end surface of the core portion 252. In the present embodiment, the upper end surface of the movable member 26 is the upper end surface of the movable member main body 261.

[0077] On the other hand, when electric power is supplied to the electromagnetic valve 1, a current flows through the coil 22, and a magnetic field in which magnetic flux flows in the axial direction is generated on the radially inner side of the coil 22. Thus, a magnetic circuit is formed through each portion of the magnetic body system of the electromagnetic valve 1. Specifically, for example, in a case where magnetic flux generated by the magnetic field of the coil 22 flows from below to above on the radially inner side of the coil 22, a magnetic circuit is formed in which the magnetic flux returns to the movable member main body 261 from the movable member main body 261, through the core portion 252, the cover portion 251a, and the cylindrical portion 251b in this order. Thus, each portion of the magnetic body system is excited, and a magnetic force that attracts each other is generated between the movable member main body 261 and the core portion 252. Therefore, when the electromagnetic valve 1 is supplied with sufficient electric power, the magnetic force generated between the movable member main body 261 and the core portion 252 is made greater than the elastic force of the elastic member 27, and thus the movable member 26 can be moved upward against the elastic force of the elastic member 27.

[0078] When the movable member 26 is moved upward, the pin 262 is released from pressing the spool 38. Therefore, the spool 38 can be moved upward. In this state, when fluid flows into the first flow passage 33 from the input port 30a, the spool 38 is urged upward by the pressure of the fluid. Thus, the spool 38 becomes a state of seating on the upper valve seat portion 372, and the valve portion 32 becomes an open state. Therefore, in a state where electric power is supplied to the electromagnetic valve 1, the valve portion 32 is opened, and the first flow passage 33 is in an open state.

[0079] In addition, in a state where electric power is supplied to the electromagnetic valve 1 and the valve portion 32 is opened, the upper end surface of the movable member 26 is in contact with the lower end surface of the core portion 252. In this state, the upper end surface of the movable member main body 261 and the lower end surface of the core portion 252 become a state of being adhered by a magnetic force. In addition, in a state where electric power is supplied to the electromagnetic valve 1 and the valve portion 32 is opened, the lower end portion of the movable member 26, i.e., the lower end portion of the pin 262, becomes a state of being separated upward from the spool 38, for example. In addition, in a state where electric power is supplied to the electromagnetic valve 1 and the valve portion 32 is opened, the lower end portion of the movable member 26 can also be in contact with the spool 38.

[0080] When the supply of power to the electromagnetic valve 1 is stopped, the magnetic circuit disappears, and the magnetic force between the movable member main body 261 and the core portion 252 disappears. Therefore, the movable member 26 is moved to the lower side by the elastic force of the elastic member 27. Thus, the valve core 38 is pushed and pressed to the lower side by the movable member 26, and the valve portion 32 is closed.

[0081] As described above, in the present embodiment, by switching the on / off of the power supplied to the electromagnetic valve 1, the movable member 26 can be moved in the axial direction, and the valve portion 32 can be opened and closed in conjunction with the movement of the movable member 26.

[0082] <Filter>

[0083] Figure 3 is a plan view showing the filter 40 installed before the nozzle portion 30 of the present embodiment. Figure 4 is a side view showing the expanded state before the filter 40 is installed on the nozzle portion 30 of the present embodiment. Figure 5 is a side view showing the state after the filter 40 is installed on the nozzle portion 30 of the present embodiment. Figure 6 is a side view showing the state after the filter 40 is installed on the nozzle portion 30. Figure 7 is an enlarged sectional view showing the fixed state of the filter 40 of the present embodiment along the line VII-VII of Figure 6 .

[0084] As shown in Figure 3 and Figure 4 , the filter 40 is formed in a thin belt shape of resin. The filter 40 has a large-width portion 40A on one side in the longitudinal direction and a small-width portion 40B on the other side in the longitudinal direction. The width of the large-width portion 40A of the filter 40 is the same as or slightly smaller than the axial length of the outer peripheral surface 31a. The thickness of the filter 40 is constant throughout the range. The length of the large-width portion 40A in the longitudinal direction is determined by the range of the longitudinal direction in which the punch portion 42 described later is provided.

[0085] As shown in Figure 5 and Figure 6 , the filter 40 is wound and fixed in such a manner that the longitudinal direction is along the circumferential direction of the nozzle portion 30 so as to cover the outer peripheral surface 31a of the recessed portion 30f of the nozzle portion 30. The filter 40 is formed in a cylindrical shape with both ends in the longitudinal direction, i.e., the filter end portions 40a, 40b, overlapping each other and is wound on the outer peripheral surface 31a of the nozzle main body 31. In the state where the filter 40 is wound on the outer peripheral surface 31a, the filter end portions 40a, 40b are fixed to each other by the rivet 39 protruding from the nozzle main body 31 (see Figure 7 ). In the present embodiment, the second filter end portion 40b is an end portion of the filter 40 that does not include the handle 46 described later.

[0086] The filter 40 has a first hole portion 41, a punch portion 42, a slit 43, a folded-back portion 44, a second hole portion 45, and a handle 46.

[0087] As shown in Figure 3 , the first hole portion 41 is located in a large-width portion 40A in the center in the longitudinal direction, and the rivet 39 is inserted thereinto. By providing the first hole portion 41 in the large-width portion 40A, the filter region of the surrounding portion of the first hole portion 41 can be ensured, and thus the rigidity of the filter 40 can be maintained, and the processing is also easy.

[0088] The first hole portion 41 is a shape in which a large-diameter portion 41a and a small-diameter portion 41b are connected in the longitudinal direction. The large-diameter portion 41a is located on the first filter end portion 40a side on which the slit 43 is provided, in the longitudinal direction. The diameter of the large-diameter portion 41a is larger than the outer diameter of the protruding tip end 39a of the rivet 39 before riveting. The small-diameter portion 41b is located on the second filter end portion 40b side on which the second hole portion 45 is provided, in the longitudinal direction. The inner diameter of the small-diameter portion 41b is the same as the outer diameter of the protruding tip end 39a of the rivet 39 before riveting. Thus, when the rivet 39 is inserted into the small-diameter portion 41b, the axial movement of the filter 40 is restricted. Specifically, the large-diameter portion 41a is easily inserted into the protruding tip end 39a of the rivet 39, and thus, after the rivet 39 is first inserted into the large-diameter portion 41a, the filter 40 is moved to the first filter end portion 40a side in the longitudinal direction, and thus the rivet 39 can be inserted into the small-diameter portion 41b.

[0089] The punch portion 42 is provided in the large-width portion 40A, and opposes the pair of discharge ports 30c, respectively. The plurality of holes of the punch portion 42 are formed substantially uniformly on the entire filter 7 except for the surrounding portions of the first hole portion 41 and the slit 43 of the large-width portion 40A. The inner diameters of the respective holes of the punch portion 42 are substantially the same. The range of the provision of the punch portion 42 of the large-width portion 40A is a range in which the pair of discharge ports 30c, 30c shown in Figure 2 are covered by the punch portion 42 when the filter 40 is wound around the outer peripheral surface 31a of the nozzle body 31. The foreign matter contained in the working oil of the fluid (working oil) that has passed through the punch portion 42 does not pass through.

[0090] The slit 43 is provided in the first filter end portion 40a on the one side in the longitudinal direction in the large-width portion 40A. The slit 43 is an opening portion that extends along the width direction X of the filter 40. The slit 43 penetrates the base material of the filter 40 in the thickness direction. The length of the slit 43 in the longitudinal direction is larger than the width of the small-width portion 40B. The length of the slit 43 in the short direction is larger than the thickness of the filter 40.

[0091] Figure 8 is a cross-sectional view from the axial direction that shows the mounting method of the filter 40 of the present embodiment.

[0092] As Figure 7 and Figure 8 shown, the folded-back portion 44 is an appropriate position between the first hole portion 41 and the long side direction of the second hole portion 45 in the small-width portion 40B. The folded-back portion 44 is inserted into the slit 43. As Figure 8 shown, the folded-back portion 44 is folded back toward the direction E2 opposite to the insertion direction El in a state of contact with the slit 43. That is, the portion (small-width portion 40B) of the second filter end portion 40b inserted into the slit 43 of the first filter end portion 40a side of the filter 40 is folded back toward the opposite direction E3 opposite to the direction in which the filter 40 is wound around the nozzle body 31, thereby forming the folded-back portion 44.

[0093] In Figure 8 , the symbol Pl shows a state before the small-width portion 40B inserted into the slit 43 is folded back. The double-dotted line of the symbol P2 shows a state after the small-width portion 40B inserted into the slit 43 is folded back at the folded-back portion 44.

[0094] The second hole portion 45 is provided to the second filter end portion 40b on the other side in the long side direction. The second hole portion 45 is a long hole shape extending in the long side direction. The second hole portion 45 is disposed on the opposite side of the first hole portion 41 in the long side direction with the folded-back portion 44 interposed therebetween. The second hole portion 45 is formed in the small-width portion 40B that is pulled out from the slit 43. The second hole portion 45 is inserted into the protruding tip end 39a of the rivet 39. The length dimension of the short axis direction of the second hole portion 45 is the same as the outer diameter of the protruding tip end 39a of the rivet 39 before riveting. Therefore, when the rivet 39 is inserted into the second hole portion 45, the axial movement of the filter 40 is restricted.

[0095] The position of the second filter end portion 40b side of the second hole portion 45 is a position at which the rivet 39 can be inserted into the second hole portion 45 of the small-width portion 40B folded back at the folded-back portion 44 in a state in which the filter 40 is wound around the nozzle body 31 without play. The second hole portion 45 is disposed in overlap with the first hole portion 41 on the radially outer side. That is, the filter 40 is fixed in a state in which the second filter end portion 40b overlaps on the radially outer side of the first filter end portion 40a.

[0096] As Figure 3 shown, another punched portion 47 is provided on the small-width portion 40B between the first hole portion 41 and the second hole portion 45. As Figure 8As shown, in this embodiment, the perforated portion 47 is located in a position not opposite to the pair of discharge ports 30c. The structure of the perforated portion 47 is the same as that of the perforated portion 42. The fluid (working oil) that has passed through the perforated portion 47 is recovered by the filter 40 if foreign matter contained in the working oil does not pass through. In addition, the filter 40 can function even when the discharge port 30c is located in the position of another perforated portion 47. Furthermore, the rigidity of the perforated portion 47 is less than that of the portion without the perforated portion 47. Therefore, since the fold-back portion 44 is located in the perforated portion 47, it is easy to fold back at the fold-back portion 44.

[0097] like Figure 3 As shown, handle 46 is part of the narrow-width portion 40B and is partially connected to the second filter end 40b via a weakened portion 461. Handle 46 is configured to be detachable from the second filter end 40b. The handle 46 can be detached manually by twisting or other methods, or it can be cut using a cutting clamp.

[0098] Next, the method of installing the filter 40 onto the nozzle body 31 will be described based on the accompanying drawings.

[0099] First, such as Figure 4 As shown, with the two filter ends 40a and 40b separated, the protruding tip 39a of the rivet 39 is inserted into the first hole 41. At this time, after first inserting the rivet 39 into the larger diameter portion 41a of the first hole 41, the filter 40 is moved towards the first filter end 40a in the long side direction, causing the rivet 39 to be inserted into the smaller diameter portion 41b. Furthermore, the rivet 39 is pre-embedded and fixed in the recess 300 of the nozzle body 31 (see reference). Figure 8 and Figure 9 ).

[0100] Next, as Figure 8 As shown, the wide portion 40A is wound and moved in a circumferential direction along the outer peripheral surface 31a of the nozzle body 31. During this movement, the narrow portion 40b on the side of the second filter end 40b passes through the slit 43 on the side of the first filter end 40a.

[0101] Then, grasp the handle 46 that has passed through the slit 43 and pull the handle 46 in the opposite direction E3 to the direction that is wrapped around the nozzle body 31. As a result, the position of the slit 43 (folded-back portion 44) moves towards the rivet 39 that is inserted into the first hole portion 41. At this time, the second hole portion 45 is located on the folded-back side of the narrow width portion 40B.

[0102] Then, the folded-back side of the small-width portion 40B is brought close to the position of the symbol P2, and the protruding tip 39a of the rivet 39 is inserted into the second hole portion 45 formed in the small-width portion 40B. In addition, since the second hole portion 45 is a long-hole shape, the rivet 39 can be reliably inserted into the second hole portion 45 even if there is a tolerance in the diametrical dimension or the circumferential length of the nozzle body 31 and the filter 40. As shown in Figure 5 and Figure 7 , the second hole portion 45 is located radially outward of the first hole portion 41. That is, the second hole portion 45 is arranged so as to overlap the first hole portion 41, forming a state in which the rivet 39 is inserted into both the first hole portion 41 and the second hole portion 45.

[0103] By inserting the rivet 39 into the second hole portion 45, the diametrical dimension of the large-width portion 40A wound around the outer circumferential surface 31a becomes substantially the same as the outer diameter of the nozzle body 31 located at the outer circumferential surface 31a. Thus, the filter 40 is positioned with respect to the outer circumferential surface 31a of the nozzle body 31. At this time, a state is formed in which the pair of discharge ports 30c, 30c are respectively covered by the punch portions 42.

[0104] In this state, a force is applied to the filter 40 in the direction in which the diameter is to be expanded, but even in this case, since the rivet 39 is inserted into the first hole portion 41 and the second hole portion 45, the two filter end portions 40a, 40b do not come off the rivet 39 or expand in diameter.

[0105] Next, as shown in Figure 6 and Figure 7 , the rivet 39 is subjected to heat caulking in the state in which it is inserted into the first hole portion 41 and the second hole portion 45. By heat caulking, the rivet 39 melts and is embedded in the entire first hole portion 41 and the second hole portion 45. Thus, the first hole portion 41 and the second hole portion 45 are fixed to the nozzle body 31 by the melted rivet 39. In addition, when heat caulking is performed, it is preferable to perform this while pressing the grip 46 toward the opposite direction E3 (see FIG. 6) opposite the direction of winding. Thus, the second filter end portion 40b can be held until the rivet 39 melts and is fixed. After the heat caulking operation is completed, the grip 46 is detached from the second filter end portion 40b. By the above operation, the mounting operation of the filter 40 to the nozzle portion 30 is completed. Figure 5

[0106] ​As described above, according to the present embodiment, the electromagnetic valve 1 having the nozzle portion 30 of a cylindrical shape on the axial side of the solenoid portion 20 is provided with: a flow path; a spool 38 disposed in the flow path, which changes the flow rate of the flow path by driving of the solenoid portion 20; a discharge port 30c connected to the flow path; a rivet 39 protruding from the peripheral surface of the nozzle portion 3; and a filter 40 of a band shape, which is installed along the circumferential direction of the nozzle portion 30 and is composed of a large-width portion 40A on one side in the longitudinal direction and a small-width portion 40B on the other side in the longitudinal direction. The filter 40 is provided with: a first hole portion 41 located at the center in the longitudinal direction and into which the rivet 39 is inserted; a punched portion 42 provided to the large-width portion 40A and opposed to the discharge port 30c; a slit 43 provided to one end portion on one side in the longitudinal direction and extending along the width direction X of the filter 40; a folded-back portion 44 inserted into the slit 43 and folded back in the direction opposite to the insertion direction in a state of being in contact with the slit 43; and a second hole portion 45 provided to the other end portion on the other side in the longitudinal direction. Thus, the small-width portion 40B that comes out of the slit 43 is folded back, and thus the filter 40 can have a fastening force. Thus, when the filter 40 is installed, the second hole portion 45 that is fixed to the rivet 39 by insertion is inhibited from being offset or detached from the rivet 39, and detachment of the filter 40 can be prevented. In addition, according to the present embodiment, since the rivet 39 is inserted into the first hole portion 41 and the second hole portion 45 in the radial direction, the installation workability of the filter 40 is good.

[0107] In addition, according to the present embodiment, since the folded-back portion 44 is folded back in the direction opposite to the insertion direction in a state of being in contact with the slit 43, the small-width portion 40B does not overlap the large-width portion 40A in a state where the filter 40 is installed to the outer peripheral surface 31a of the nozzle main body 31. Thus, the punched portion 42 provided to the large-width portion 40A is not clogged by the small-width portion 40B, and the oil flow passage of the filter 40 can be prevented from being obstructed.

[0108] In addition, according to the present embodiment, the first hole portion 41 is a shape that connects a large-diameter portion 41a and a small-diameter portion 41b. Thus, the large-diameter portion 41a is easily inserted into the protruding front end 39a of the rivet 39. Specifically, the rivet 39 is first inserted into the large-diameter portion 41a, and then the filter 40 is moved toward the first filter end portion 40a side in the longitudinal direction, whereby the rivet 39 can be inserted into the small-diameter portion 41b.

[0109] In addition, according to the present embodiment, the second hole portion 45 is a long hole shape that extends in the longitudinal direction. Thus, the rivet 39 can be reliably inserted into the second hole portion 45 while tolerances in the diameter and the circumference of the nozzle main body 31 and the filter 40 are absorbed.

[0110] Further, according to the present embodiment, the other punch portion 47 is provided on the small-width portion 40B between the first hole portion 41 and the second hole portion 45. The rigidity of the other punch portion 47 is smaller than the rigidity of the portion without the other punch portion 47. Therefore, since the turn-back portion 44 is located at the other punch portion 47, it is easy to turn back at the turn-back portion 44.

[0111] Further, according to the present embodiment, the nozzle portion 30 has a recess 300 into which the rivet 39 is fitted on the outer circumferential surface 31a. Therefore, the first hole portion 41 and the second hole portion 45 into which the rivet 39 is inserted can be fixed to the nozzle portion 30 via the rivet 39 by fitting the rivet 39 into the recess 300.

[0112] The above describes the embodiment of the present application, but the structures and combinations thereof in the embodiment are one example, and addition, omission, replacement, and other changes of the structures can be made within the scope of the gist of the present application. Further, the present application is not limited to the embodiment.

[0113] For example, in the above-described embodiment, the first hole portion 41 is a shape connecting the large-diameter portion 41a and the small-diameter portion 41b, but is not limited thereto. For example, the first hole portion 41 can be a first hole portion 41 in which only the small-diameter portion 41b is formed

[0114] Further, in the above-described embodiment, the second hole portion 45 is a long hole shape extending in the long direction, but is not limited to a long hole. In general, as long as the second hole portion is a shape into which the protrusion can be inserted.

[0115] Further, in the above-described embodiment, the other punch portion 47 is provided on the small-width portion 40B between the first hole portion 41 and the second hole portion 45, but the other punch portion 47 can be omitted.

[0116] Further, in the above-described embodiment, the nozzle portion 30 is configured to have a recess 300 into which the protrusion is fitted on the outer circumferential surface 31a of the nozzle main body 31, but is not limited to such a structure.

[0117] Note that the present technology can employ the following configurations.

[0118] (1) An electromagnetic valve having a nozzle of a cylindrical shape on one side in the axial direction of a solenoid, comprising: a flow path; a spool disposed in the flow path and changing the flow rate of the flow path by driving of the solenoid; a port connected to the flow path; a protrusion protruding from the peripheral surface of the nozzle; and a filter of a band shape installed along the circumferential direction of the nozzle and composed of a large-width portion on one side in the longitudinal direction and a small-width portion on the other side in the longitudinal direction, the filter comprising: a first hole portion in the center in the longitudinal direction and for insertion of the protrusion; a punched hole portion provided in the large-width portion and opposed to the port; a slit provided in one end portion on one side in the longitudinal direction and extending along the width direction of the filter; a folded-back portion inserted into the slit and folded back in the direction opposite to the insertion direction in the state of contact with the slit; and a second hole portion provided in the other end portion on the other side in the longitudinal direction, the second hole portion being inserted by the protrusion and fixed to the protrusion.

[0119] (2) The electromagnetic valve according to (1), wherein the first hole portion is a shape connecting a large-diameter portion and a small-diameter portion.

[0120] (3) The electromagnetic valve according to (1) or (2), wherein the second hole portion is a long hole shape extending in the longitudinal direction.

[0121] (4) The electromagnetic valve according to any one of (1) to (3), wherein another punched hole portion is provided on the small-width portion between the first hole portion and the second hole portion.

[0122] (5) The electromagnetic valve according to any one of (1) to (4), wherein the nozzle has a recess portion on the peripheral surface into which the protrusion is fitted and fixed.

[0123] Symbol explanation

[0124] 1 solenoid valve, 20 solenoid portion, 22 coil, 24 guide member, 26 movable member, 261 movable member main body, 262 pin, 27 elastic member, 30 nozzle portion, 30a input port, 30b output port, 30c discharge port, 30f recessed portion, 31 nozzle main body, 31a outer peripheral surface, 32 valve portion, 33 first flow path, 34 second flow path, 36 fixed portion, 37 valve chamber, 38 valve core, 39 rivet (protrusion), 39a protruding front end, 300 recessed portion, 391 shaft portion, 392 bulged portion, 40 filter, 40A large width portion, 40B small width portion, 40a first filter end portion, 40b second filter end portion, 41 first hole portion, 41a large diameter portion, 41b small diameter portion, 42 punched portion, 43 slit, 44 folded-back portion, 45 second hole portion, 46 handle, 47 another punched portion, J center axis.

Claims

1. A solenoid valve having a cylindrical nozzle on one axial side of a solenoid, characterized in that, have: flow path; A valve core, which is disposed in the flow path and causes the flow rate of the flow path to change by the drive of the solenoid; The port is connected to the flow path; A protrusion that protrudes from the circumferential surface of the nozzle; as well as A strip filter, mounted circumferentially along the nozzle, consists of a wide portion on one side of the long side and a narrow portion on the other side of the long side. The filter has the following features: A first hole is located at the center along the long side and is for the protrusion to be inserted; A punched portion is provided in the wide portion and is opposite to the port; A slit is provided at one end of the filter along the long side and extends along the width direction of the filter; A fold-back section is inserted into the slit and folds back in the opposite direction to the insertion direction while in contact with the slit. as well as The second hole is located at the other end of the opposite side along the long side. The second hole, which protrudes from the slit, is inserted into and fixed to the protrusion.

2. The solenoid valve according to claim 1, characterized in that, The first hole is shaped to connect the large-diameter portion and the small-diameter portion.

3. The solenoid valve according to claim 1, characterized in that, The second hole is an elongated hole shape that extends along the long side.

4. The solenoid valve according to claim 1, characterized in that, Another punched portion is provided in the narrow width portion between the first hole and the second hole.

5. The solenoid valve according to claim 1, characterized in that, The nozzle has a recess on its circumferential surface that is embedded in and fixes the protrusion.

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