Solenoid valve

Abstract

To reduce the number of processing steps and a material cost, and to enhance assembling workability.SOLUTION: An electromagnetic valve has a valve part 11a for controlling a flow of fluid, and an electromagnetic drive unit 11b for driving the valve part. The electromagnetic drive unit comprises a coil 31, a sleeve 28 fixed to the valve part so as to extend in a vertical direction at a center part of the coil, a plunger arranged in the sleeve, an aspirator for aspirating the plunger, and a housing 35 having a housing ceiling plate part 35a for covering an upper face of the coil while allowing the penetration of the sleeve, and a housing bottom plate part 35b for covering a lower face of the coil. The electromagnetic valve also comprises a shaft part erecting upward from an upper face of the sleeve, a flange part 41 having a flange main body 42 supported to the shaft part, and expanded in a flange shape, and a clip member 51 having elasticity in a vertical direction, gripped between the flange main body and the housing ceiling plate part, and blocking the extrusion of the housing and the coil from the sleeve.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a solenoid valve, and more particularly to a fixing structure for a coil that drives a valve body. [Background technology]

[0002] 2. Description of the Related Art Solenoid valves, which open and close using an electromagnetic coil, are used in refrigeration cycle devices that have a refrigerant circuit, such as air conditioners, refrigeration devices, and freezing devices.

[0003] Such solenoid valves are available in two types: normally closed type, which opens only when current is applied, and normally open type, which closes only when current is applied. Also, there are direct acting type solenoid valves, which open and close the valve body directly with an electromagnetic coil, and pilot type solenoid valves, which open and close a pilot valve with an electromagnetic coil, and open and close the main valve in response to the opening and closing of this pilot valve. These solenoid valves are used according to the application.

[0004] Further, the following patent documents disclose such a solenoid valve. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2019-007572 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, in conventional solenoid valves, there is room for improvement in the structure for fixing the coil to the valve body.

[0007] Specifically, in the solenoid valve described in Patent Document 1, a yoke (corresponding to the "housing" of the present invention) made of a magnetic material is provided to cover the coil, and protruding parts are formed on the left and right sides of the bottom of the yoke, and the coil is fixed to the top surface of the valve body by passing a male screw through these protruding parts. For this reason, threading (forming a female screw that screws into the male screw) is required in two places on the valve body, which requires a large number of processing steps.

[0008] In addition, because the housing requires two through holes through which the male screws can pass and a protrusion needs to be formed, when the housing is manufactured using a progressive press, which has excellent productivity, the material width increases accordingly, resulting in increased material costs and increased processing labor.

[0009] Furthermore, because it is fixed in two places, it is inconvenient that the orientation of the coil cannot be freely changed, and if the fixing point is close to the coil, the side of the coil gets in the way when tightening the male screw, making it difficult to tighten, and there are aspects that make it difficult to work with during assembly.

[0010] SUMMARY OF THE PRESENT EMBODIMENTS An object of the present invention is to provide a solenoid valve having a new coil fixing structure that can solve the above-mentioned problems. [Means for solving the problem]

[0011] In order to solve the above problems and achieve the object, the solenoid valve according to the present invention includes a valve section that controls the flow of a fluid, and an electromagnetic drive device that is fixed to the valve section and drives the valve section. The valve section includes a valve body that has a valve chamber therein and a first flow path port and a second flow path port that communicate with the valve chamber and has a valve seat provided on the valve chamber side of the second flow path port, and a valve element that moves toward and away from the valve seat to open and close the second flow path port.

[0012] In the solenoid valve of the present invention, the fluid may flow in from the first flow path port and flow out from the second flow path port, or conversely, the fluid may flow in from the second flow path port and flow out from the first flow path port. The valve seat may be provided integrally with the second flow path port, or may be provided as a separate member from the second flow path port. Furthermore, the "fluid" in the present invention is typically a refrigerant, but may also be a fluid substance other than a refrigerant, such as other liquids, gases, or a mixture thereof.

[0013] Furthermore, if the direction from the valve portion toward the electromagnetic drive device is defined as "up" and the direction from the electromagnetic drive device toward the valve portion is defined as "down," the electromagnetic drive device has a coil that generates magnetic force, a sleeve fixed to the valve portion so as to extend vertically from the center of the coil, a plunger disposed within the sleeve, an attractor that attracts the plunger, and a housing having a top plate portion (also called the "housing top plate portion") that covers the top surface of the coil and a bottom plate portion (also called the "housing bottom plate portion") that covers the bottom surface of the coil. The housing is made of a magnetic material. Furthermore, the sleeve passes through the coil and the housing in the vertical direction.

[0014] In addition, the "up-down direction" (also called the "vertical direction") in this application refers to a direction that includes the above-mentioned "up" and "down," but is also the axial direction (length direction) of the sleeve. Furthermore, "horizontal" and "horizontal direction" in this application refer to a direction perpendicular to the up-down direction (vertical direction). Furthermore, the "up-down direction" in this invention is not necessarily limited to the vertical direction, and may be inclined or perpendicular to the vertical direction.

[0015] Furthermore, the solenoid valve has a flange portion having a shaft portion rising upward from the upper surface of the sleeve and a flange main body supported by the shaft portion and expanding into a flange shape. A clip member is sandwiched between the flange main body and the housing top plate. This clip member has elasticity in the vertical direction, and presses (comes into pressing contact with) the flange main body and the housing top plate so as to expand the gap between them, preventing the housing and coil from slipping out of the sleeve (this function is referred to as the "first function" of the clip member).

[0016] In the invention described in Patent Document 1, the housing is provided with protruding parts that protrude to the left and right, and the housing is fixed to the valve part (valve body) by two male screws. In contrast, according to the present invention, the coil can be fixed to the valve part with good workability by a simple operation of simply clamping the clip member between the flange part (flange body) and the top plate part of the housing, and there is no need to form protruding parts on the housing, and no need to thread the valve part. Therefore, according to the present invention, the number of processing steps and material costs can be reduced compared to the conventional method.

[0017] The sleeve penetrates the bottom plate of the housing, the coil, and the top plate of the housing, typically protruding above the upper surface of the housing top plate, and has a flange on the upper surface of the sleeve. The flange body of the flange is supported by the shaft so that a space (gap) is formed between the flange and the top surface (upper surface) of the sleeve, and typically has a shape that spreads horizontally from the upper end of the shaft.

[0018] Furthermore, the flange portion may be configured as a single member in which the shaft portion and the flange body are integrated (for example, as in the first embodiment described below), or the shaft portion may be formed integrally with the sleeve, and the flange body may be a single independent member, and this flange body may be fixed to the shaft portion formed integrally with the sleeve (for example, as in the modified example described later based on Figure 8).

[0019] In addition, to fix the flange portion (the shaft portion of the flange portion constructed as a single member) to the sleeve or to fix the flange main body to the shaft portion integral with the sleeve, welding (e.g., spot welding) may be used, for example, but the fixing method is not particularly important.

[0020] A more specific structure of the clip member can be, for example, a leaf spring-like member having a top plate portion (also referred to as the "clip top plate portion") that is pressed against the flange body, a bottom plate portion (also referred to as the "clip bottom plate portion") that is pressed against the housing top plate portion, and a flexible connecting plate portion (also referred to as the "clip connecting plate portion") that connects the clip top plate portion and the clip bottom plate portion.

[0021] The clip member preferably has a locking piece that engages with the flange body to prevent the clip member from slipping out from between the flange body and the housing top plate. This is to prevent the clip member from falling off when the solenoid valve is in use, and to more securely fix the coil and housing to the valve portion. This function, i.e., the function of preventing the clip member itself from falling off (slipping out) from between the flange portion (flange body) and the housing top plate, is referred to as the "second function" of the clip member.

[0022] Furthermore, in one aspect of the present invention, the solenoid valve has a relative rotation prevention portion that prevents relative rotation between the coil and the housing, and the housing has a rotation prevention piece portion on the housing bottom plate portion that engages with the valve portion to prevent rotation of the coil and housing around the sleeve.

[0023] According to this aspect, it is possible to prevent the coil and the housing from rotating around the sleeve relative to the valve portion.

[0024] The relative rotation prevention portion may have any structure capable of preventing relative rotation between the coil and the housing, and its specific structure is not particularly important. As one example, a recess (e.g., a slit-shaped mating groove) that fits into a protrusion (e.g., a bulge formed on the top surface of the coil) formed on the surface of the coil may be formed in the top plate of the housing, so that when the housing is attached to the coil, the protrusion on the surface of the coil fits into the recess in the top plate of the housing.

[0025] In yet another aspect of the present invention, the solenoid valve has a relative rotation prevention portion that prevents relative rotation between the coil and the housing, and the clip member has an engagement protrusion that engages with the flange body to prevent the clip member from slipping out from between the flange body and the housing top plate and prevents the clip member from rotating around the sleeve, and a rotation prevention engagement portion that engages with the coil or the housing to prevent rotation of the coil and the housing around the sleeve.

[0026] According to this another embodiment, the clip member can achieve the second function (the function of preventing the clip member itself from falling off) and a function similar to the anti-rotation piece of the above embodiment, i.e., the function of preventing the coil and housing from rotating around the sleeve (this function is referred to as the "third function" of the clip member).

[0027] In other words, in the above-mentioned another aspect, the engagement projection of the clip member engages with the flange body, thereby preventing the clip member itself from falling out from between the flange body and the housing top plate, and at the same time, preventing the clip member itself from rotating around the sleeve. Furthermore, the rotation prevention engagement portion of the clip member engages with the coil or the housing, thereby preventing the coil and the housing from rotating around the sleeve.

[0028] The rotation prevention engagement portion may have any structure capable of preventing relative rotation between the clip member and the coil (or the housing), and the specific structure is not particularly limited, but as one example, the coil and the housing may be prevented from rotating relative to the clip member by abutting (contacting) an edge of the clip member (e.g., a tip edge of the clip bottom plate portion) against a convex portion formed on the surface of the coil (e.g., a bulge formed on the top surface of the coil). As another example, a hole may be formed on the top surface of the housing, and a claw that engages with the hole may be formed on the clip member. This example also makes it possible to prevent the coil and the housing from rotating relative to the clip member.

[0029] In yet another aspect of the above, the flange body may have a plurality of engagement holes formed at positions equidistant from the central axis of the sleeve, into which the engagement protrusions can be inserted when the clip member is clamped between the flange body and the housing top plate portion during installation.

[0030] According to this embodiment, it becomes possible to change the direction of the coil more freely. That is, in conventional solenoid valves, the fixing direction (the direction of the housing and the coil) of the housing (and therefore the coil fixed thereto) was restricted by the position of the screw hole formed in the valve part. In addition, in order to form a screw hole, the ceiling part of the valve part (valve body) needs a wall thickness to accommodate the screw hole, so the screw hole cannot be formed in any position, and there are also restrictions due to the structure of the valve part.

[0031] In contrast, according to the present invention, since the coil is fixed to the upper surface of the housing by a clip member, there is no restriction as described above, and the direction of the coil (for example, the direction in which the power supply cable is pulled out to the coil) can be changed relatively freely. Also, according to the above-mentioned another aspect, if a plurality of engagement holes (for example, 4 to 8 or 9 or more) are formed as the plurality of engagement holes and arranged at equal intervals in an arc, it becomes possible to change the direction of the coil minutely over 360°.

[0032] The engagement hole into which the engagement projection fits is typically a through hole as in a fourth embodiment described later, but may be a hole such as a recess that does not penetrate through.

[0033] The solenoid valve according to the present invention may be a direct acting solenoid valve in which the solenoid drive device directly drives the valve body, or may be a pilot type solenoid valve in which the solenoid drive device indirectly drives the valve body (main valve body) via a pilot valve as in the embodiment described later. The present invention can be applied to both a normally open type solenoid valve that is in an open state when not energized, and a normally closed type solenoid valve that is in a closed state when not energized.

[0034] Another solenoid valve according to the present invention includes a valve section which controls the flow of a fluid, and an electromagnetic drive device which is fixed to the valve section and drives the valve section. The valve section includes a valve body having a valve chamber therein and a first flow path port and a second flow path port which communicate with the valve chamber, the valve body having a valve seat provided on the valve chamber side of the second flow path port, and a valve body which moves toward and away from the valve seat to open and close the second flow path port. When the direction from the valve section toward the electromagnetic drive device is defined as "up" and the direction from the electromagnetic drive device toward the valve section is defined as "down", the electromagnetic drive device includes a sleeve which is fixed to the valve section so as to extend in the up-down direction, a plunger which is disposed within the sleeve, and a plunger which is disposed in the sleeve. the housing is made of a magnetic material and has a housing top plate and a housing bottom plate, allowing the sleeve to pass through; the flange portion has a shaft portion rising upward from the upper surface of the sleeve and a flange body supported by the shaft portion and expanding into a flange shape; and a clip member which is elastic in the vertical direction and is sandwiched between the flange body and the housing top plate to press against the flange body and the housing top plate so as to widen the gap between the flange body and the housing top plate, thereby preventing the housing and coil from slipping out of the sleeve. Effect of the Invention

[0035] According to the present invention, the number of processing steps and material costs during manufacture of the solenoid valve can be reduced, and workability during assembly can be improved.

[0036] Other objects, features and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments of the present invention, which are given with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts. [Brief description of the drawings]

[0037] [Figure 1] FIG. 1 is a perspective view showing a solenoid valve according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a front view showing the solenoid valve according to the first embodiment. [Diagram 3] FIG. 3 is a right side view showing the solenoid valve according to the first embodiment. [Figure 4]FIG. 4 is an enlarged right side view (cross-sections of the flange member and clip member) showing an engaged state (part B in FIG. 3) of the solenoid valve of the first embodiment. [Diagram 5] FIG. 5 is a perspective view showing a clip member provided in the solenoid valve of the first embodiment. [Figure 6] FIG. 6 is a vertical cross-sectional view (cross-section taken along the arrow XX in FIG. 3) showing the solenoid valve (left and right portions and a lower end portion of the valve portion are omitted) according to the first embodiment in an open state. [Figure 7] FIG. 7 is a vertical cross-sectional view (cross-section taken along the arrow XX in FIG. 3) showing the solenoid valve according to the first embodiment (left and right portions and a lower end portion of the valve portion are omitted) in a closed state. [Figure 8] FIG. 8 is a view similar to FIG. 4, showing a modified example of the flange member of the solenoid valve according to the first embodiment (however, the cross section of the shaft portion is not shown). [Figure 9] FIG. 9 is a perspective view showing a solenoid valve according to a second embodiment of the present invention. [Figure 10] FIG. 10 is a right side view showing the solenoid valve according to the second embodiment. [Figure 11] FIG. 11 is an enlarged right side view (cross-sections of the flange member and clip member) showing the engaged state (part B1 of FIG. 10) of the clip member in the solenoid valve of the second embodiment. [Figure 12] FIG. 12 is a perspective view showing a clip member provided in the solenoid valve of the second embodiment. [Figure 13] FIG. 13 is a perspective view showing a solenoid valve according to a third embodiment of the present invention. [Figure 14] FIG. 14 is a right side view showing the solenoid valve according to the third embodiment. [Figure 15] FIG. 15 is an enlarged right side view (cross-sections of the flange member and clip member) showing the engaged state (portion B2 in FIG. 14) of the clip member in the solenoid valve of the third embodiment. [Figure 16] FIG. 16 is a perspective view showing a clip member provided in the solenoid valve of the third embodiment. [Figure 17] FIG. 17 is a perspective view showing a solenoid valve according to a fourth embodiment of the present invention. [Figure 18] FIG. 18 is a right side view showing the solenoid valve according to the fourth embodiment. [Figure 19] FIG. 19 is an enlarged right side view (cross-sections of the flange member and clip member) showing the engaged state (portion B3 in FIG. 18) of the clip member in the solenoid valve of the fourth embodiment. [Figure 20] FIG. 20 is a view similar to FIG. 19, showing a modified example of the flange member of the solenoid valve according to the fourth embodiment (however, the cross section of the shaft portion is not shown). [Figure 21] FIG. 21 is a view similar to FIG. 8 showing an example of a rotation preventing engagement portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0038] [First embodiment] A solenoid valve 11 according to a first embodiment of the present invention will be described with reference to Figures 1 to 7. In each figure, mutually orthogonal two-dimensional or three-dimensional coordinates representing the front-rear, left-right, and up-down directions are appropriately displayed, and the following description will be based on these directions, but the present invention and the solenoid valve of this embodiment can be used in various orientations, and each direction is for the convenience of explanation and does not impose any limitations on the configuration of each part of the present invention.

[0039] As shown in Figures 1 to 7, a solenoid valve 11 according to a first embodiment of the present invention includes a valve portion 11a that opens and closes a fluid flow path and an electromagnetic drive device 11b that drives the valve portion 11a.The solenoid valve is a pilot-type solenoid valve in which a main valve that opens and closes the fluid flow path is controlled by a pilot valve, and is a normally open type valve that is in an open state when not driven.

[0040] The valve portion 11a comprises a valve body 12 having an opening on its top surface (referred to as an "top surface opening") and a main valve chamber 13 therein, a first flow passage pipe (first flow passage port) 14 provided on one side surface (right side surface) of the valve body 12 so as to communicate with the main valve chamber 13, a second flow passage pipe (second flow passage port) 15 provided on the other side surface (left side surface) of the valve body 12 so as to be able to communicate with the main valve chamber 13, a valve port 16 which communicates with the second flow passage pipe 15 and stands vertically upward in the center of the main valve chamber 13, and has a main valve seat 17 formed at its upper end, and a valve port 16 which is connected to the second flow passage pipe 15 and has a valve seat 17 formed at its upper end. The valve body 12 includes a main valve element 18 that opens and closes the valve port 16 by moving forward and backward (up and down), a first valve-opening spring 24 that urges the main valve element 18 in the valve-opening direction (upward), a plug-shaped member 27 that closes the top opening of the valve body 12 (the top surface of the main valve chamber 13), a pilot valve (described later) provided on the top surface of the main valve element 18 to control the main valve element 18, and a flange member 41 and a clip member 51 for fixing the electromagnetic drive unit 11b (coil 31 and housing 35) to the valve body 12 and the top surface of the plug-shaped member 27. An attractor 33 of the electromagnetic drive unit 11b (described later) is integrally formed on the top surface of the plug-shaped member 27.

[0041] The plug-shaped member 27 that closes the top opening of the valve body 12 is a ring-shaped member having a central hole 27a that penetrates vertically through the center. The outer circumferential surface of the plug-shaped member 27 is formed with a male thread 27d that screws into the female thread 12a formed on the inner circumferential surface of the top opening of the valve body 13. By screwing the plug-shaped member 27 into the top opening of the valve body 12, the plug-shaped member 27 including the suction element 33 is fixed to the top surface of the valve body 12.

[0042] The main valve body 18 is supported so as to be slidable in the vertical direction by a central hole 27a of a plug-shaped member 27. A step 27b is formed on the bottom peripheral edge of the central hole 27a, and a first valve-opening spring 24 made of a coil spring is placed in a compressed state between the step 27b and the main valve body 18.

[0043] The main valve body 18 has a pilot passage 19 that passes through its center in the vertical direction to communicate between the main valve chamber 13 and a pilot valve chamber 21 (described later), and a pressure equalizing passage 20 that also passes through the main valve body 18 in the vertical direction to communicate between the main valve chamber 13 and the pilot valve chamber 21 but has a smaller diameter than the pilot passage 19. The main valve chamber 13 is the internal space of the center hole 27a of the plug-shaped member 27, including the space between the main valve body 18 and the main valve seat 17, and the space that extends below the internal space and communicates with the first flow path pipe 14. The pilot valve chamber 21 is the space formed above the main valve body 18, i.e., the space surrounded by the upper surface of the main valve body 18, the lower surface of the attractor 33, and the inner circumferential surface of the center hole 27a of the plug-shaped member 27.

[0044] Furthermore, the upper end of the central hole 27a of the plug-shaped member 27 is reduced in diameter (in other words, the upper peripheral edge of the central hole 27a is protruded inward toward the center) to form a step 27c. When the main valve element 18 is in the open state in which it rises, it comes into contact with the step 27c, thereby stopping the main valve element 18.

[0045] A pilot valve is provided between the upper surface of the main valve body 18 and the electromagnetic drive device 11b. Specifically, a pilot valve chamber 21 is formed above the main valve body 18, and a pilot valve seat 22 is formed at the upper end (the center of the upper surface of the main valve body 18) of a pilot passage 19 that opens into this pilot valve chamber 21. A pilot valve body 23 is provided so as to be able to approach and separate from the pilot valve seat 22 (abut and separate).

[0046] The pilot valve body 23 is composed of a cylindrical head portion 23b and a rod-shaped rod portion 23a having an outer diameter smaller than that of the head portion 23b. The rod portion 23a extends vertically downward from the lower surface of the head portion 23b and has a conical tip portion at the lower end. The pilot passage 19 is closed by inserting the tip portion of the rod portion 23a into the pilot valve seat 22 (the upper end portion of the pilot passage 19). Meanwhile, the head portion 23b is held at the lower end portion of the plunger 34 so as to be embraced by the plunger 34 described later. In addition to this, an upper coil spring 26 is installed in a compressed state between the head portion 23b and a top plate portion 28a of the sleeve 28. The upper coil spring 26 presses the head portion 23b against the lower surface portion of the plunger 34. As a result, the pilot valve body 23 moves up and down together with the plunger 34 to open and close the pilot passage 19. The upper coil spring 26 also functions to cushion the impact of the plunger 34 coming into contact with the sleeve top plate portion 28a during the valve-opening operation.

[0047] The electromagnetic drive device 11b for driving the pilot valve includes a coil 31 formed by winding a bobbin 32, an attractor 33 disposed inside the coil 31, a plunger 34 attracted to the attractor 33 by a magnetic force generated by the coil 31, and a housing 35 surrounding the coil 31. The bobbin 32 also has a cylindrical portion at its center. The attractor 33 and the plunger 34 are disposed within this cylindrical portion while being housed within a sleeve 28. The sleeve 28 is a cylindrical member with no bottom and a lid (i.e., the upper surface is closed and the lower surface is open), but the lower end is fixed to the outer circumferential surface of the upper end of the attractor 33, thereby closing the opening on the lower surface. The sleeve 28 is produced, for example, by pressing.

[0048] The suction element 33 has an upper portion that is fitted into the inside of the sleeve 28 from the lower opening of the sleeve 28 so as to be able to suction the plunger 34, and a base portion 33a with a larger outer diameter at the lower end. The suction element 33 is disposed so as to penetrate the center of the bottom plate portion 35b (described later) of the housing 35 in the vertical direction, with the upper portion of the suction element 33 disposed above the bottom plate portion 35b, and the base portion 33a disposed below the housing bottom plate portion 35b. The suction element 33 also has a through hole 33b that penetrates vertically at its center. This through hole 33b communicates with the center hole 27a of the plug-shaped member 27, and the rod portion 23a of the pilot valve body 23 extends vertically through the through hole 33b of the suction element 33, with the lower end (tip portion) reaching the upper portion of the center hole 27a of the plug-shaped member 27.

[0049] Furthermore, a second valve-opening spring 25 that urges the pilot valve element 23 upward (in the valve-opening direction) is provided between the suction element 33 and the plunger 34. This second valve-opening spring 25 is made of a coil spring like the first valve-opening spring 24 provided in the main valve chamber 13, and urges the pilot valve element 23 in the valve-opening direction (upward) by being installed in a compressed state.

[0050] The housing 35 is made of a magnetic material so as to form a magnetic path (so as to form a magnetic circuit that attracts the plunger 34 together with the attractor 33), and is provided with a top plate portion (housing top plate portion) 35a covering the upper surface of the coil 31, a bottom plate portion (housing bottom plate portion) 35b covering the lower surface of the coil 31, and a connecting plate portion (housing connecting plate portion) 35c connecting the top plate portion 35a and the bottom plate portion 35b so as to accommodate the coil 31 inside.

[0051] On the other hand, the coil 31 has a connector portion 36 that protrudes horizontally from its upper surface. This connector portion 36 is for connecting to an external circuit that supplies power to the winding of the coil 31, and is internally provided with a terminal pin 36c (see FIG. 2) for connection. A bulge portion 36a is formed at the base end of the connector portion 36 so as to bulge upward from the upper surface of the coil 31, and a slit-shaped fitting groove 35d formed at the front end of the housing top plate portion 35a fits the bulge portion 36a so as to sandwich it. This prevents relative rotation between the coil 31 and the housing 35 (relative rotation around the central axis A of the coil 31 and the solenoid valve 11). The bulge portion 36a and the fitting groove 35d that fit together correspond to the relative rotation prevention portion referred to in the present invention. In addition, vertical movement (displacement) of coil 31 is prevented by sandwiching coil 31 between housing top plate portion 35a and housing bottom plate portion 35b, and horizontal movement (displacement) of coil 31 is prevented by inserting sleeve 28 and attractor 33 into the center of coil 31, housing top plate portion 35a, and housing bottom plate portion 35b.

[0052] Furthermore, a rotation prevention piece 38 is provided at the front end of the bottom plate portion 35b of the housing 35, which engages with the valve body 12 to prevent rotation of the coil 31 and the housing 35 around the sleeve 28. This rotation prevention piece 38 can be formed, for example, by making two parallel cuts extending rearward from the front end of the housing bottom plate portion 35b and bending the portion between these cuts downward at a right angle. The rotation prevention piece 38 formed in this manner abuts (comes into contact with) the front surface of the valve body 12, thereby preventing the housing 35 (and therefore the coil 31, whose relative rotation with the housing 35 is prevented) from rotating around the sleeve 28.

[0053] The flange member 41 and clip member 51 that secure the coil 31 and the housing 35 to the valve portion 11a (the upper surface of the valve body 12 and the plug-shaped member 27) have the following structure in this embodiment.

[0054] First, the flange member 41 is composed of a bottomed, open-top, cup-shaped (cylindrical) shaft portion 43, and a flange main body 42 that spreads horizontally outward from the upper edge of the shaft portion 43. The shaft portion 43 is fixed, for example, by welding, to the upper surface (upper surface of the sleeve top plate portion 28a) of the sleeve 28 that protrudes upward from the housing top plate portion 35a. The flange main body 42 is supported by the shaft portion 43 that stands vertically upward from the upper surface of the sleeve 28 so that a certain gap is formed between the flange main body 42 and the upper surface of the sleeve 28.

[0055] The flange main body 42 has a disk-like overall shape, but its peripheral portion 42a extends vertically downward to form a recess 42b on the underside. This is to realize a function (the second function of the clip member 51) of preventing the clip member 51 from falling off (coming out from between the flange main body 42 and the housing top plate portion 35a) by engaging the locking piece portion 55 of the clip member 51 described later so as to be inserted into the recess 42b. The height of the shaft portion 43 is set so that a gap through which the locking piece portion 55 can pass when the clip member 51 is attached is formed between the upper surface of the sleeve 28 and the flange main body 42 (particularly the lower end of the peripheral portion 42a of the flange main body that is lowered downward).

[0056] Furthermore, the outer diameter of the flange main body 42 is preferably smaller than each of the width of the hole (notched groove 52a) in the housing top plate 35a, the width of the hole (notched groove 53a) in the housing bottom plate 35b, and the inner diameter of the coil 31, and more preferably is the same as (or slightly smaller than) the outer diameter of the sleeve 28. This is so that the coil 31 and the housing 35 can be attached to the sleeve 28 while inserting the sleeve 28. The flange member 41 as described above can be produced by press working, which is advantageous for mass production (the same applies to the sleeve 28, the sleeve provided with the shaft portion 28b described later with reference to FIG. 8, and the clip members 51, 62, 72).

[0057] On the other hand, the clip member 51 has a flat top plate portion (clip top plate portion) 52 and a flat bottom plate portion (clip bottom plate portion) 53 that extend horizontally and in parallel with each other at a certain interval in an attached state (a state sandwiched between the flange main body 42 and the housing top plate portion 35a), and a connecting plate portion (clip connecting plate portion) 54 that connects the top plate portion 52 and the bottom plate portion 53, and is a leaf spring-like member in which the front side of the connecting plate portion 54 as a whole can be elastically deformed in the up-down direction (thickness or height direction) when the connecting plate portion 54 is bent. In other words, the clip member 51 is a member in which the top plate portion 52 and the bottom plate portion 53 are supported in a cantilever shape by the upper end and the lower end of the C-shaped curved connecting plate portion 54, and is a member that can be deformed so that the front end of the top plate portion 52 and the front end of the bottom plate portion 53 approach each other when the connecting plate portion 54 is bent.

[0058] Both the clip top plate portion 52 and the clip bottom plate portion 53 have, for example, a rectangular planar shape, and are formed with slit-like notched grooves 52a, 53a extending rearward from the center of the front edge toward the center of the member. These notched grooves 52a, 53a enable the clip top plate portion 52 to receive the shaft portion 43 of the flange member 41 and the clip bottom plate portion 53 to receive the sleeve 28 when the clip member 51 is attached, so that the clip member 51 can be sandwiched between the flange main body 42 and the housing top plate portion 35a.

[0059] When the clip member 51 is sandwiched between the flange main body 42 and the housing top plate portion 35a (when the clip member 51 is in an attached state), for example, the connecting plate portion 54 is bent. The biasing force of the clip member 51 causes the clip top plate portion 52 to press the flange main body 42 upward and the clip bottom plate portion 53 to press the housing top plate portion 35a downward, thereby achieving the function of preventing the housing 35 and the coil 31 accommodated therein from slipping out upward from the sleeve 28 (the first function of the clip member).

[0060] In this embodiment, as an example, when the clip member 51 is attached, the top plate portion 52 and the bottom plate portion 53 are in a position in which they spread horizontally and in parallel with each other at a certain interval. That is, before the clip member 51 is attached, the top plate portion 52 and the bottom plate portion 53 have an inclined shape such that the distance between the front ends of the top plate portion 52 and the bottom plate portion 53 is greater than the distance between the rear ends of the top plate portion 52 and the bottom plate portion 53, and when the clip member 51 is attached, for example, the connecting plate portion 54 is bent, so that the top plate portion 52 and the bottom plate portion 53 are in a position in which they spread horizontally and in parallel with each other at a certain interval. As a result, according to this embodiment, it is possible to reduce the rattling of the coil 31 relative to the valve body 12, and it is possible to fix the coil 31 to the valve body 12 in a stable state.

[0061] Furthermore, a locking piece 55 that is inserted into the recess 42b on the underside of the flange main body is formed at the back (rear) of the notched groove 52a of the clip top plate portion 52. This locking piece 55 rises vertically upward from the rear of the notched groove 52a and engages with the peripheral edge 42a of the flange main body 42 that stands downward, thereby fulfilling the function of preventing the clip member 51 from slipping out rearward (the second function of the clip member 51).

[0062] Furthermore, the front edge 53b of the clip bottom plate portion 53, which extends linearly in the left-right direction, abuts against the bulge portion 36a (the base end portion of the connector portion 36) formed on the upper surface of the coil when the clip member 51 is attached. The bulge portion 36a also has a linear rear edge 36b that also extends in the left-right direction, and the front edge 53b of the clip bottom plate portion 53 and the rear edge 36b of the bulge portion 36a come into contact with each other, thereby preventing the clip member 51 from rotating around the sleeve 28.

[0063] The procedure for assembling the coil 31 and the housing 35 to the valve portion 11a is as follows: (1) sandwich the coil 31 between the housing top plate portion 35a and the housing bottom plate portion 35b so that the bulge portion 36a on the top surface of the coil is inserted into the mating groove 35d of the housing top plate portion 35a; (2) place the coil 31 and the housing 35 on the top surface of the valve portion 11a (valve body 12) with the sleeve 28 inserted in the center; and then (3) insert the shaft portion 43 and sleeve 28 of the flange member 41 into the respective cutout grooves 52a, 53a of the clip top plate portion 52 and the clip bottom plate portion 53, and sandwich the clip member 51 between the flange body 42 and the housing top plate portion 35a from the rear until the front edge 53b of the clip bottom plate portion 53 abuts the rear edge 36b of the bulge portion 36a. At this time, the clip member 51 is elastically deformed by being pressed vertically (to bring the clip top plate portion 52 closer to the clip bottom plate portion 53) so that the locking piece portion 55 is inserted into the recess 42b on the underside of the flange main body 42.

[0064] As described above, according to this embodiment, the coil 31 can be easily installed and fixed to the valve portion 11a (sleeve 28) together with the housing 35. Furthermore, there is no need for screwing or threading the valve portion 11a as in the conventional art.

[0065] In addition, the housing 35, which forms a magnetic circuit (magnetic path) that attracts the plunger 34 together with the attractor 33, is preferably attached tightly to the attractor 33 without any gaps (without forming an air gap between them) to prevent a decrease in the attractive force. According to this embodiment, the housing 35 is pressed downward by the clip member 51, and the housing bottom plate portion 35b is attached tightly to the upper surface of the attractor 33 (base portion 33a), which has the advantage of forming an excellent magnetic path without any gaps.

[0066] Furthermore, FIG. 8 shows a modified example of the flange member. This modified example is an example in which the flange body 42 and the shaft portion 43 are configured separately. In this modified example, the flange portion has the shaft portion 28b as the shaft portion, and the flange body has a flange body member 44 as the flange body. Specifically, the flange body is made of a disk-shaped member having a peripheral portion 42a capable of forming the recessed portion 42b like the flange body 42, as the flange body member 44, while the shaft portion 28b is formed integrally with the sleeve 28 so that the center of the sleeve top plate portion 28a protrudes vertically upward in a cylindrical shape. Then, the flange body member 44 is fixed, for example, by welding, to the upper surface of the shaft portion 28b (the cylindrical protruding portion on the upper surface of the sleeve 28). Even with such a modified example, the locking piece portion 55 of the clip member 51 can be engaged with the recessed portion 42b of the flange body member 44 to achieve the same object as the first embodiment.

[0067] The operation of the solenoid valve 11 according to this embodiment will be described as follows.

[0068] 6, the pilot passage 19 is open, and the high-pressure fluid that flows into the main valve chamber 13 through the first flow passage pipe 14 and into the pilot valve chamber 21 through the pressure equalizing passage 20 does not accumulate in the pilot valve chamber 21, but passes through the pilot passage 19 and is discharged to the outside through the valve port 16 and the second flow passage pipe 15. As a result, the pressure in the pilot valve chamber 21 does not increase, and the main valve element 18 is pressed against the lower surface (step portion 27c) of the plug-shaped member 27 by the urging force of the first valve-opening spring 24 that urges the main valve element 18 upward (in the valve-opening direction), maintaining the open valve state, and the fluid that has flowed into the main valve chamber 13 from the first flow passage pipe 14 (see arrow F1) flows out to the outside through the valve port 16 and the second flow passage pipe 15 (see arrow F2).

[0069] In the above-mentioned valve-open state, when the coil 31 in the electromagnetic drive device 11b is energized, the plunger 34 is attracted by the attractor 33 and moves down against the biasing force of the second valve-opening spring 25, causing the pilot valve element 23 to seat on the pilot valve seat 22. This closes the pilot passage 19, and the fluid pressure introduced into the pilot valve chamber 21 through the pressure equalizing path 20 accumulates without being released through the pilot passage 19, causing the pressure in the pilot valve chamber 21 to rise. Then, when the force pushing the main valve element 18 downward due to the fluid pressure in the pilot valve chamber 21 (more precisely, the pressure difference between the pilot valve chamber 21 and the main valve chamber 13) exceeds the upward biasing force of the first valve-opening spring 24, the main valve element 18 moves down and seats on the main valve seat 17. This closes the valve port 16, resulting in a closed valve state (see FIG. 7).

[0070] On the other hand, when the current to the coil 31 is stopped in this valve-closed state, the attraction force of the attractor 33 disappears and the plunger 34 is released from the attractor 33, so that the plunger 34 is pushed back upward by the second valve-opening spring 25, the pilot valve body 23 separates from the pilot valve seat 22, and the pilot passage 19 is opened. Then, the fluid accumulated in the pilot valve chamber 21 is discharged to the outside through the pilot passage 19, the valve port 16, and the second flow passage 15, and the pressure in the pilot valve chamber 21 decreases. Furthermore, since the cross-sectional area of ​​the pilot passage 19 is larger than that of the pressure equalizing passage 20, a pressure difference that pulls the main valve body 18 upward occurs on the upper and lower surfaces of the main valve body 18. In addition, the first valve-opening spring 24 has a biasing force that pulls the main valve body 18 upward. As a result, the main valve body 18 is pushed up, and the main valve body 18 separates from the main valve seat 17, opening the valve port 16 and creating an open valve state (see FIG. 6).

[0071] In this open state, the plunger 34 is pushed up by the second valve-opening spring 25 and is in the uppermost position where it abuts against the top plate portion 28a of the sleeve 28, and the main valve body 18 is stopped by abutting against the lower surface (step portion 27c) of the plug-shaped member 27. As a result, a certain gap is formed between the pilot valve body 23 and the pilot valve seat 22 in the center of the upper surface of the main valve body 18, and the pilot passage 19 is opened.

[0072] Second Embodiment A solenoid valve 61 according to a second embodiment of the present invention will be described with reference to FIGS.

[0073] 9 to 12, a solenoid valve 61 according to a second embodiment of the present invention includes a valve portion 11a, an electromagnetic drive device 11b (coil 31, housing 35, sleeve 28, etc.), and a flange member 41 similar to those of the solenoid valve 11 according to the first embodiment, but the shape of the clip member is different. For this reason, in this embodiment, the clip member will be described using the reference numeral 62. In the following, the same or similar components will be given the same reference numerals, duplicated descriptions will be omitted, and differences will be mainly described (the same applies to the third and fourth embodiments).

[0074] The clip member 62 of this embodiment is a leaf spring-like member including a top plate portion 52, a bottom plate portion 53, and a connecting plate portion 54, similar to the clip member 51 of the first embodiment, but unlike the first embodiment in which the connecting plate portion 54 was located on the rear side, in this embodiment the connecting plate portion 54 is located on the front side and is attached between the flange main body 42 and the housing top plate portion 35a from the connecting plate portion 54 side. For this reason, a notched groove 54a is also formed in the connecting plate portion 54, which is the front edge of the clip member.

[0075] In this embodiment, the front surface of the clip connecting plate portion 54 abuts against the rear edge 36b of the bulge portion 36a on the upper surface of the coil, thereby preventing rotation of the clip member 62. The clip member 62 in this embodiment also has a locking piece portion 55 on the top plate portion 52 that engages with the flange main body 42 to prevent the clip member 62 from slipping out.

[0076] Third Embodiment A solenoid valve 71 according to a third embodiment of the present invention will be described with reference to FIGS.

[0077] 13 to 16, a solenoid valve 71 according to a third embodiment of the present invention, like the solenoid valve 61 according to the second embodiment, has a different shape of a clip member compared to the solenoid valve 11 according to the first embodiment. For this reason, in this embodiment, the clip member will be described by assigning the reference numeral 72.

[0078] Specifically, the clip member 72 of this embodiment is a leaf spring-like member having a top plate portion 52 and a bottom plate portion 53, similar to the clip member 51 of the first embodiment, but is provided with a slanted plate portion 73 arranged diagonally between the top plate portion 52 and the bottom plate portion 53 as connecting plate portions connecting the top plate portion 52 and the bottom plate portion 53, a first connecting plate portion 74, and a second connecting plate portion 75.The first connecting plate portion 74 connects the rear edge of the slanted plate portion 73 to the rear edge of the top plate portion 52, and the second connecting plate portion 75 connects the front edge of the slanted plate portion 73 to the front edge of the bottom plate portion 53, so that the clip member as a whole has a Z-shaped side shape.

[0079] In this embodiment, the front surface of the second connecting plate portion 75 abuts against the rear edge 36b of the bulging portion 36a on the upper surface of the coil, thereby preventing rotation of the clip member 72. The clip member 72 in this embodiment also has a locking piece portion 55 on the top plate portion 52.

[0080] [Fourth embodiment] A solenoid valve 81 according to a fourth embodiment of the present invention will be described with reference to FIGS.

[0081] 17 to 20, a solenoid valve 81 according to a fourth embodiment of the present invention includes a valve portion 11a, an electromagnetic driving device 11b (coil 31, housing 35, sleeve 28, etc.), and a clip member 51 similar to those of the solenoid valve 11 according to the first embodiment, but has a different flange member structure. For this reason, in this embodiment, the flange member will be described with reference numeral 82.

[0082] Specifically, the flange member 82 of this embodiment has a cup-shaped (cylindrical) shaft portion 43 like the flange member 41 of the first embodiment, but the flange main body 83 has a disk (flat) shape. In addition, in the first embodiment, the peripheral edge portion 42a that hangs down is formed on the flange main body 42, but instead, an engagement hole 84 that penetrates the flange main body 83 in the up-down direction is formed on the peripheral edge portion of the flange main body 83. A plurality of engagement holes 84 (eight in this embodiment) are formed so as to be arranged in an arc shape along the peripheral edge of the flange main body 83 (so as to be equidistant from the central axis of the shaft portion 43), and when the clip member 51 is attached, the locking piece portion 55 of the clip member 51 is inserted into any one of these engagement holes 84.

[0083] As shown in FIG. 20, in the present embodiment as well, similar to the modified example of the first embodiment (FIG. 8), it is also possible to form the shaft portion 28b integrally with the sleeve 28 and configure the flange main body as a separate member (flange main body member) 85.

[0084] Also, in this embodiment, unlike the above-described embodiments, the anti-rotation piece 38 that engages with the valve body 12 to prevent rotation of the coil 31 and the housing 35 around the sleeve 28 is not formed on the housing bottom plate portion 35b. This is because the flange member 82 also performs the function of the anti-rotation piece 38.

[0085] That is, the locking piece portion 55 of the clip member 51 is fitted into the engagement hole 84 of the flange main body 83, which not only prevents the clip member 51 itself from falling off (second function of the clip member 51), but also prevents the clip member 51 from rotating around the sleeve 28. Therefore, the front edge 53b of the clip bottom plate portion 53 abuts against the rear edge 36b of the bulging portion 36a, thereby preventing the coil 31 and the housing 35 from rotating relative to the clip member 51 (third function of the clip member). That is, according to this embodiment, the clip member 51 can have all of the first to third functions. The locking piece portion 55 in this embodiment corresponds to the engagement protrusion referred to in the present invention.

[0086] Furthermore, according to this embodiment, the coil 31 and the housing 35 can be prevented from coming off and rotating only by the top surface of the coil 31, and there is no need to consider the engagement between the anti-rotation piece 38 of the housing bottom plate 35b and the valve body 12 as in the previous embodiments, so the orientation of the coil 31 can be changed by the number of engagement holes 84 in the flange body 83 (in this embodiment, eight engagement holes are provided, so the orientation can be changed in eight different directions over 360°), making it possible to set the orientation of the connector part 36 connected to the external circuit more freely. Note that by increasing the number of engagement holes 84, it is possible to change the orientation in even more detail.

[0087] Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and it will be apparent to those skilled in the art that various modifications can be made within the scope of the claims.

[0088] For example, in the explanation of the above embodiment, four types of flange members (FIGS. 4, 8, 19, and 20) and three types of clip members (FIGS. 5, 12, and 16) are shown, but combinations other than those explained as the first to fourth embodiments can also be adopted. Furthermore, it is also possible to adopt structures different from the four types of flange members and the three types of clip members within the scope of the claims.

[0089] Furthermore, the specific configurations of the valve section and the electromagnetic drive device are not limited to the structures described in the first embodiment, and may be various.

[0090] Furthermore, in the above embodiment, the clip members 51, 62, 72 have edges that abut against the bulge 36a formed on the surface of the coil 31, as an example of a rotation-preventing engagement portion that prevents rotation of the coil 31 and the housing 35 around the sleeve 28. In other words, the rotation-preventing engagement portion of the clip members 51, 62, 72 has a structure that engages with the coil 31.

[0091] Meanwhile, as another example, the rotation preventing engagement portion may have a structure that engages with the housing. An example of this will be described with reference to FIG. 21. In FIG. 21, a clip member 51 is described as an example. A hole 90 is formed in the housing top plate portion 35a of the housing 35. The hole 90 is formed, for example, in the vicinity of the bulging portion 36a of the coil 31. A claw portion 91 that is disposed in the hole 90 is formed in the front end portion of the clip member 51. The claw portion 91 has a shape that protrudes downward. The claw portion 91 engages with the hole 90 to prevent the coil 31 and the housing 35 from rotating around the sleeve 28. [Explanation of symbols]

[0092] A center axis 11,61,71,81 Solenoid valve 11a Valve part 11b Electromagnetic drive unit 12 Valve body 12a Female thread 13 Main valve chamber 14 First flow pipe 15 Second flow pipe 16 Valve Orifice 17 Main valve seat 18 Main valve body 19 Pilot Passage 20 Pressure Equalizing Path 21 Pilot valve chest 22 Pilot valve seat 23 Pilot valve body 23a Rod section 23b Head section 24 First valve opening spring 25 Second valve opening spring 26 Upper coil spring 27 Plug-shaped member 27a Center hole 27b,27c Stepped section 27d Male thread 28 Sleeve 28a Sleeve top plate 28b,43 Shaft 31 Coil 32 Bobbin 33 Attractor 33a Base part 33b Through hole 34 Plunger 35 Housing 35a Housing top plate 35b Housing bottom plate 35c Housing connection plate 35d fitting groove 36 Connector part 36a Bulge 36b Posterior edge of bulge 36c Terminal pin 38 Anti-rotation piece 41,82 Flange member 42,83 Flange body 42a Periphery 42b Recess 44,85 Flange body member 51, 62, 72 Clip member 52 Clip top plate 52a, 53a, 54a Notched groove 53 Clip bottom plate 53b Front edge of the bottom plate of the clip 54 Clip connecting plate part 55 Locking piece 73 Swash plate section 74 1st connecting plate section 75 Second connecting plate section 84 Engagement hole 90 holes 91 Claw part

Claims

1. A valve portion for controlling the flow of the fluid; an electromagnetic drive device fixed to the valve portion and driving the valve portion; Equipped with The valve portion is a valve body having a valve chamber therein, a first flow passage port and a second flow passage port communicating with the valve chamber, and a valve seat provided on the valve chamber side of the second flow passage port; a valve body that moves toward and away from the valve seat to open and close the second flow path port; having When the direction from the valve portion toward the electromagnetic drive device is defined as an up direction and the direction from the electromagnetic drive device toward the valve portion is defined as a down direction, The electromagnetic drive device is A coil that generates a magnetic force; a bottomless, lidded sleeve having a cylindrical body and an upper wall, the sleeve being fixed to the valve portion so as to extend vertically from a center of the coil; a plunger disposed within the sleeve; A suction element that suctions the plunger; a housing made of a magnetic material, allowing the sleeve to pass through, the housing having a housing top plate portion covering an upper surface of the coil and a housing bottom plate portion covering a lower surface of the coil; have A solenoid valve, the sleeve is a single member in which the body portion and the upper wall portion are continuous by being formed by press working, The solenoid valve further comprises: a flange portion including a shaft portion welded to an upper surface of the sleeve and rising upward, and a flange body supported by the shaft portion and extending in a flange shape; a clip member that has elasticity in the vertical direction, is sandwiched between the flange body and the housing top plate portion, and presses the flange body and the housing top plate portion so as to expand the gap between the flange body and the housing top plate portion, thereby preventing the housing and the coil from slipping out of the sleeve; Equipped with A solenoid valve characterized by:

2. A valve portion for controlling the flow of a fluid; an electromagnetic drive device fixed to the valve portion and driving the valve portion; Equipped with The valve portion is a valve body having a valve chamber therein, a first flow passage port and a second flow passage port communicating with the valve chamber, and a valve seat provided on the valve chamber side of the second flow passage port; a valve body that moves toward and away from the valve seat to open and close the second flow path port; having When the direction from the valve portion toward the electromagnetic drive device is defined as an up direction and the direction from the electromagnetic drive device toward the valve portion is defined as a down direction, The electromagnetic drive device is A coil that generates a magnetic force; a bottomless, lidded sleeve having a cylindrical body and an upper wall, the sleeve being fixed to the valve portion so as to extend vertically from a center of the coil; a plunger disposed within the sleeve; A suction element that suctions the plunger; a housing made of a magnetic material, allowing the sleeve to pass through, the housing having a housing top plate portion covering an upper surface of the coil and a housing bottom plate portion covering a lower surface of the coil; have A solenoid valve, the sleeve is a single member in which the body portion and the upper wall portion are continuous by being formed by press working, The upper wall portion has a shaft portion rising upward, The solenoid valve further comprises: a flange body welded to the shaft portion and extending in a flange shape; a clip member that has elasticity in the vertical direction, is sandwiched between the flange body and the housing top plate portion, and presses the flange body and the housing top plate portion so as to expand the gap between the flange body and the housing top plate portion, thereby preventing the housing and the coil from slipping out of the sleeve; Equipped with A solenoid valve characterized by:

3. The clip member is a clip top plate portion pressed against the flange body; a clip bottom plate portion pressed against the housing top plate portion; a clip connecting plate portion having flexibility and connecting the clip top plate portion and the clip bottom plate portion; have It is a leaf spring-like member.

3. The solenoid valve according to claim 1 or 2.

4. The clip member has a locking piece portion that engages with the flange body to prevent the clip member from slipping out from between the flange body and the housing top plate portion. The solenoid valve according to claim 3.

5. The solenoid valve has a relative rotation prevention portion that prevents relative rotation between the coil and the housing, The housing has a rotation prevention piece on the housing bottom plate portion that engages with the valve portion to prevent the coil and the housing from rotating around the sleeve.

5. A solenoid valve according to claim 1.

6. The solenoid valve has a relative rotation prevention portion that prevents relative rotation between the coil and the housing, The clip member is an engagement protrusion that engages with the flange body to prevent the clip member from slipping out from between the flange body and the housing top plate portion and to prevent the clip member from rotating around the sleeve; a rotation prevention engagement portion that engages with the coil or the housing to prevent the coil and the housing from rotating around the sleeve; have The solenoid valve according to any one of claims 1 to 3.

7. The flange body includes: a plurality of engagement holes into which the engagement projections can be fitted when the clip member is sandwiched between the flange body and the housing top plate portion and which are formed at positions equidistant from the central axis of the sleeve; have The solenoid valve according to claim 6.

8. A valve portion for controlling the flow of the fluid; an electromagnetic drive device fixed to the valve portion and driving the valve portion; Equipped with The valve portion is a valve body having a valve chamber therein, a first flow passage port and a second flow passage port communicating with the valve chamber, and a valve seat provided on the valve chamber side of the second flow passage port; a valve body that moves toward and away from the valve seat to open and close the second flow path port; having When the direction from the valve portion toward the electromagnetic drive device is defined as an up direction and the direction from the electromagnetic drive device toward the valve portion is defined as a down direction, The electromagnetic drive device is a bottomless, lidded sleeve having a cylindrical body and an upper wall, the sleeve being fixed to the valve portion so as to extend in a vertical direction; a plunger disposed within the sleeve; A suction element that suctions the plunger; a housing made of a magnetic material, allowing the sleeve to pass therethrough, the housing having a housing top plate portion and a housing bottom plate portion; have A solenoid valve, the sleeve is a single member in which the body portion and the upper wall portion are continuous by being formed by press working, The solenoid valve further comprises: a flange portion including a shaft portion welded to an upper surface of the sleeve and rising upward, and a flange body supported by the shaft portion and extending in a flange shape; a clip member that has elasticity in the vertical direction, is sandwiched between the flange body and the housing top plate portion, and presses the flange body and the housing top plate portion so as to expand the gap between the flange body and the housing top plate portion, thereby preventing the housing from slipping out of the sleeve; Equipped with A solenoid valve characterized by:

9. A valve portion for controlling the flow of a fluid; an electromagnetic drive device fixed to the valve portion and driving the valve portion; Equipped with The valve portion is a valve body having a valve chamber therein, a first flow passage port and a second flow passage port communicating with the valve chamber, and a valve seat provided on the valve chamber side of the second flow passage port; a valve body that moves toward and away from the valve seat to open and close the second flow path port; having When the direction from the valve portion toward the electromagnetic drive device is defined as an up direction and the direction from the electromagnetic drive device toward the valve portion is defined as a down direction, The electromagnetic drive device is a bottomless, lidded sleeve having a cylindrical body and an upper wall, the sleeve being fixed to the valve portion so as to extend in a vertical direction; a plunger disposed within the sleeve; A suction element that suctions the plunger; a housing made of a magnetic material, allowing the sleeve to pass therethrough, the housing having a housing top plate portion and a housing bottom plate portion; have A solenoid valve, the sleeve is a single member in which the body portion and the upper wall portion are continuous by being formed by press working, The upper wall portion has a shaft portion rising upward, The solenoid valve further comprises: a flange body welded to the shaft portion and extending in a flange shape; a clip member that has elasticity in the vertical direction, is sandwiched between the flange body and the housing top plate portion, and presses the flange body and the housing top plate portion so as to expand the gap between the flange body and the housing top plate portion, thereby preventing the housing from slipping out of the sleeve; Equipped with A solenoid valve characterized by:

10. A valve portion for controlling the flow of a fluid; an electromagnetic drive device fixed to the valve portion and driving the valve portion; Equipped with The valve portion is a valve body having a valve chamber therein, a first flow passage port and a second flow passage port communicating with the valve chamber, and a valve seat provided on the valve chamber side of the second flow passage port; a valve body that moves toward and away from the valve seat to open and close the second flow path port; having When the direction from the valve portion toward the electromagnetic drive device is defined as an up direction and the direction from the electromagnetic drive device toward the valve portion is defined as a down direction, The electromagnetic drive device is A coil that generates a magnetic force; a sleeve fixed to the valve portion so as to extend vertically from a center portion of the coil; a plunger disposed within the sleeve; A suction element that suctions the plunger; a housing made of a magnetic material, allowing the sleeve to pass through, the housing having a housing top plate portion covering an upper surface of the coil and a housing bottom plate portion covering a lower surface of the coil; have A solenoid valve, a flange portion having a shaft portion rising upward from an upper surface of the sleeve and a flange main body supported by the shaft portion and extending in a flange shape; a clip member that has elasticity in the vertical direction, is sandwiched between the flange body and the housing top plate portion, and presses the flange body and the housing top plate portion so as to expand the gap between the flange body and the housing top plate portion, thereby preventing the housing and the coil from slipping out of the sleeve; and a relative rotation prevention portion that prevents relative rotation between the coil and the housing; having The housing has a rotation prevention piece on the housing bottom plate portion that engages with the valve portion to prevent the coil and the housing from rotating around the sleeve. A solenoid valve characterized by:

11. A valve portion for controlling the flow of a fluid; an electromagnetic drive device fixed to the valve portion and driving the valve portion; Equipped with The valve portion is a valve body having a valve chamber therein, a first flow passage port and a second flow passage port communicating with the valve chamber, and a valve seat provided on the valve chamber side of the second flow passage port; a valve body that moves toward and away from the valve seat to open and close the second flow path port; having When the direction from the valve portion toward the electromagnetic drive device is defined as an up direction and the direction from the electromagnetic drive device toward the valve portion is defined as a down direction, The electromagnetic drive device is A coil that generates a magnetic force; a sleeve fixed to the valve portion so as to extend vertically from a center portion of the coil; a plunger disposed within the sleeve; A suction element that suctions the plunger; a housing made of a magnetic material, allowing the sleeve to pass through, the housing having a housing top plate portion covering an upper surface of the coil and a housing bottom plate portion covering a lower surface of the coil; have A solenoid valve, a flange portion having a shaft portion rising upward from an upper surface of the sleeve and a flange main body supported by the shaft portion and extending in a flange shape; a clip member that has elasticity in the vertical direction, is sandwiched between the flange body and the housing top plate portion, and presses the flange body and the housing top plate portion so as to expand the gap between the flange body and the housing top plate portion, thereby preventing the housing and the coil from slipping out of the sleeve; and a relative rotation prevention portion that prevents relative rotation between the coil and the housing; having The clip member is an engagement protrusion that engages with the flange body to prevent the clip member from slipping out from between the flange body and the housing top plate portion and to prevent the clip member from rotating around the sleeve; a rotation prevention engagement portion that engages with the coil or the housing to prevent the coil and the housing from rotating around the sleeve; have A solenoid valve characterized by:

12. The clip member is a clip top plate portion pressed against the flange body; a clip bottom plate portion pressed against the housing top plate portion; a clip connecting plate portion having flexibility and connecting the clip top plate portion and the clip bottom plate portion; have It is a leaf spring-like member.

12. The solenoid valve according to claim 10 or 11.

13. The clip member has a locking piece portion that engages with the flange body to prevent the clip member from slipping out from between the flange body and the housing top plate portion. A solenoid valve according to claim 12 when dependent on claim 10.

14. The flange body includes: a plurality of engagement holes into which the engagement projections can be fitted when the clip member is sandwiched between the flange body and the housing top plate portion and which are formed at positions equidistant from the central axis of the sleeve; have The solenoid valve according to claim 11.

Images