JP2002228037A - Solenoid valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solenoid valve having excellent reliability capable of improving assembly workability and reducing a load to each component in assembling. SOLUTION: A connector member 17 includes a stepped part 17b formed so as to have a larger diameter than a part projected to an outside, and is so structured that the stepped part 17b is hooked on a bent part 93 and the connector member 17 is positioned when the connector member 17 is inserted from an opening part another end side of a case member 9. After the connector member 17 is inserted, all various components for forming a solenoid are inserted from the opening part on the other end side of the case member 9 sequentially. After a bracket plate 12 is mounted, a valve part 100B is mounted and caulking is executed by a protrusion 94 for caulking provided on a one end of a valve sleeve 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve suitably used for various fluid pressure controls and the like.

[0002]

2. Description of the Related Art Conventionally, as this type of solenoid valve, for example, there is one shown in FIG. FIG. 7 is a schematic sectional view of a conventional solenoid valve.

[0003] The solenoid valve 200 comprises a solenoid section 200A and a valve section 200B.

Here, the valve portion 200B is a spool valve, and since the opening area of the valve changes in accordance with the stroke of the spool, the amount of inflow and outflow of fluid is controlled by controlling the amount of stroke of the spool by a solenoid. It has a configuration that can be used.

[0005] The solenoid section 200A is roughly composed of a coil 2
03, a plunger 201 magnetically attracted to the center post 202 by energizing the coil 203, and a rod connected to the plunger 201 for transmitting the drive of the plunger 201 to the valve portion 200B (specifically, a spool). 204, a case member 208 in which various solenoid components are incorporated, and a connector 211 for supplying power to the coil 203.

The plunger 201 includes a first bearing 205 and a second bearing 210 for increasing the coaxiality of the reciprocating plunger 201 and the rod 204. The rod 204 fitted to the plunger 201 is connected to the bearings 205 and 210. Supported by
One bearing 205 is held by a sleeve 206.
The other bearing 210 is held by a center post 202. Further, an upper plate 207 for forming a magnetic path is provided.

Here, the plunger 201 is in the normal state,
That is, when the coil 203 is not energized, the coil 203 is located in a direction away from the center post 202.

In general, the plunger 201 is urged in a direction away from the center post 202 by an urging member such as a spring. In the illustrated example, the plunger is configured to be separated from the center post 202 via the spool by providing a spring that biases the spool toward the solenoid portion 200A.

[0009] By energizing the coil 203, a magnetic path is formed, and the plunger 201 is magnetically attracted to the center post 202.

Therefore, the magnetic force can be controlled by the magnitude of the current flowing through the coil 203, whereby the stroke of the spool can be controlled by controlling the amount of movement of the plunger 201. , And various fluid pressure controls such as hydraulic control can be performed.

Here, in the solenoid valve 200 according to the prior art, various solenoid constituent members including the plunger 201 and the center post 202 are provided inside the hollow of a substantially cylindrical case member 208 according to the shape of each member. After appropriately assembling from both ends of the case member 208, swaging portions 208a provided at one end of the case member 208 are provided.
The assembly is performed by caulking the end of the upper plate 207 and caulking the end of the valve portion 200B by the caulking portion 208b provided at the other end (the caulking sequence is the caulking portion 208a). Is not always the first).

By the way, as in a solenoid valve 200 according to the prior art shown in FIG. 7, in a case where the connector 211 is arranged at a rear end of the solenoid valve main body at a part in a circumferential direction, a solenoid is used. There is a disadvantage that compatibility is poor because the positional relationship with the bracket 212 for attaching the valve body to a predetermined attachment location must be changed according to the attachment location.

Therefore, in order to improve the compatibility, as shown in FIG. 8, the connector 311 is connected to the solenoid valve 30.
At the rear end of the main body 0, there is known a type that protrudes outside from one end side of a case member 308.

In this case, the connector 311 is
Since the connector 311 projects outward from one end of the connector 08 and has the connector 311 on the axis, there is no need to consider the positional relationship with the bracket or the like, and the compatibility is excellent.

In the case of this type, a step 311a is formed in the connector 311 formed by insert-molding the connector terminal, and the step 31 is formed.
A swaging portion 311 provided at one end of the case member 308 in 1a
The assembly was performed by swaging a.

[0016]

However, in the case of the above-described prior art, the following problems have occurred.

As described above, in the case of the solenoid valve according to the prior art, since various solenoid components must be incorporated into the case member 208 from both sides, the case member 208 is appropriately inverted during the assembly process. This has led to an increase in the number of assembling steps and the complexity of the assembling work.

Further, since various solenoid components must be incorporated from both sides, a caulking process is required at two locations on both sides to fix the various components.

When the seal ring is assembled on the inner periphery of the case member, if the seal ring is in sliding contact with the inner periphery of the case member for a long time, the seal ring may be worn or the seal ring may be twisted. There is a possibility that the sealing state may be deteriorated due to the deterioration of the mounting state such as the mounting state.

Also, in the inner peripheral portion of the case, the inner diameter accuracy and the surface condition accuracy are required at the portion where the above-mentioned seal ring abuts and at the portion where the outer periphery of the upper plate serving as the magnetic flux supply portion abuts. .

Further, in the configuration of the solenoid valve according to the prior art as shown in FIG. 8, a caulking load is applied to the resin material among the solenoid constituent members, so that deformation or the like is likely to occur. This was causing the accuracy to deteriorate.

Accordingly, the solenoid valve 30 shown in FIG.
In the case of 0, the load of the resin material to which the caulking load is applied must be sufficiently considered, and the thickness L0 from the groove for mounting the seal member O to the end face must be sufficiently large.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art. It is an object of the present invention to improve the assembling workability and to reduce the burden on each constituent member at the time of assembling. And to provide a solenoid valve having excellent reliability.

[0024]

In order to achieve the above object, according to the present invention, there is provided a substantially cylindrical case member having a bent portion bent inward at one end, and the other end of the case member. A connector member having a connector portion that is inserted into the hollow interior from the side and has a stepped portion positioned at the bending portion, and that has a connector portion protruding outside from one end side of the case member, and the connector member is inserted. After that, sequentially, various solenoid components that are inserted into the hollow interior from the other end of the case member, and a valve that is attached after these various solenoid components are inserted, a solenoid valve comprising: The other end of the case member is provided with a caulking projection for assembling the valve and the various solenoid components in a state where the valve is mounted.

Therefore, it is sufficient that all the various solenoid components are incorporated from the other end side of the case member, and a step of inverting the case member during the assembling process becomes unnecessary, and only one caulking is required. Further, since the connector has a structure protruding from one end of the case member to the outside, there is a greater degree of freedom in the positional relationship in the rotational direction than in the case where the connector is provided on the outer peripheral surface of the case member, so that the compatibility is excellent. Furthermore,
Since the caulking is performed only on the other end side of the case member, a load load at the time of caulking on the connector member arranged on the one end side is small.

At one end of the case, there is provided a seal ring for tightly sealing the inner peripheral surface of the case, and the case is provided on one end of the case, the portion being in close contact with the seal ring. The area containing the small diameter part, and
The other end side of the small diameter portion of the case may be a large diameter portion that does not contact the outer peripheral surface of the seal ring.

Thus, when assembling the connector member, the large diameter portion of the case does not come into contact with the seal ring. In addition, a portion (small diameter portion) where the seal ring is required to be in close contact with the seal ring and which requires relatively high accuracy can be limited to a part. That is, it is not necessary to increase the dimensional accuracy and the like of the entire case member, but it is sufficient to make the large diameter portion rough and increase the accuracy only for the small diameter portion.

A bracket plate for integrally mounting a bracket for attaching the solenoid valve body to another element and a plate on the valve side for forming a magnetic path between the case member and the solenoid component member are provided. The caulking of the bracket plate in a state where one end of the valve abuts on one surface thereof and a part of the edge on the other end side of the case member abuts on the other surface. And a part of the edge on the other end side of the case member,
The bracket plate and one end of the valve are clamped and fixed to perform assembly, and the solenoid component includes an upper plate having one end abutting on the inner peripheral surface of the case to form a magnetic path. And
One end of the upper plate may be in contact with the inner peripheral surface of the small diameter portion of the case.

Here, "integrally formed" means that a plurality of parts (in this case, a bracket and a plate) are joined to one member by welding, caulking, or fitting of unevenness, or one member. (For example, a single steel plate) is formed into one component by pressing or the like.

Thus, the caulking load when caulking is applied only to the plate, one end of the valve, and the case member. In addition, the portion where the upper plate comes into contact is brought into contact with a portion (small diameter portion) that is relatively limited and requires relatively high accuracy. Thus, it is not necessary to increase the dimensional accuracy and the like for the entire case member, but it is sufficient to make the large diameter portion rough and increase the accuracy only for the small diameter portion.

[0031]

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the dimensions of the components described in this embodiment,
The materials, shapes, relative arrangements, and the like are not intended to limit the scope of the present invention only to them unless otherwise specified.

Referring to FIGS. 1 to 6, a solenoid valve according to an embodiment of the present invention will be described. First, a general outline of a solenoid valve according to the present embodiment is shown in FIG.
This will be described with reference to FIG. FIG. 1 is a schematic sectional view of a solenoid valve according to an embodiment of the present invention. FIG. 2 is a schematic structural view of a solenoid valve according to the embodiment of the present invention. B) is P in (A)
(C) is an overview viewed from the direction Q in (A).

The solenoid valve 100 includes a solenoid portion 100A and a valve portion 100B.

Here, the valve portion 100B is a spool valve, and a spool 15 is reciprocally movable inside a valve sleeve 16 serving as a valve portion main body.
Since the opening area of the valve formed in this manner changes, the inflow amount and outflow amount of the fluid can be controlled by controlling the stroke amount of the spool 15 by the solenoid.

The solenoid section 100A is roughly composed of a coil 3
And a connector member 17 in which terminals 17a electrically connected to supply power to the coil 3 are insert-molded.
And a plunger 1 magnetically attracted to the center post 2 by energizing the coil 3, a rod 7 connected to the plunger 1 to transmit the driving of the plunger 1 to the spool 15, and various solenoid constituent members (described above). Coil 3
Member 9 for assembling the center post 2)
And

A sleeve 4 serving as a bearing of the plunger 1, a bobbin 6 around which the coil 3 is wound, and a shim 8 for facilitating the separation of the plunger 1 from the center post 2.
A packing 10 for preventing fluid from leaking from the inside of the valve portion 100B to the coil 3 side; an upper plate 11 for forming a magnetic path; And a bracket plate 12 for fixing to the element.

Further, the bearing 13 of the rod 7 and the spool 1
And a spring 14 for urging the plunger 1 away from the center post 2 via the rod 7 together with the spool 15 by urging the E-ring 18 fixed to 5.

Incidentally, the coil 3 and the bobbin 6 are made into Assy by molding, and constitute a molded coil sub-Assy5.

Here, the plunger 1 is located in a direction away from the center post 2 in a normal state, that is, in a state where the coil 3 is not energized, that is, in the present embodiment, Like spool 15
Of the plunger 1 toward the solenoid 100A via the E-shaped ring 18, the plunger 1 is separated from the center post 2.

When the coil 3 is energized, the coil 3 generates a magnetic field to form a magnetic path (a magnetic path formed by the case 9, the upper plate 11, the plunger 1, the center post 2, and the bracket plate 12). The plunger 1 is magnetically attracted to the center post 2.

Therefore, the magnetic force can be controlled by the magnitude of the current flowing through the coil 3, whereby the stroke of the spool 15 can be controlled by controlling the amount of movement of the plunger 1, whereby the amount of fluid By controlling the flow rate, it is possible to perform various fluid pressure controls such as hydraulic control.

Next, the assembly structure of the solenoid valve according to this embodiment will be described.

The solenoid valve 10 according to the present embodiment
In the case of 0, in order to realize excellent interchangeability, in order to make the arrangement relationship with the bracket irrelevant in the circumferential direction, the connector member 17 is positioned at one end of the case member 9 so as to be on the axis. It has a structure that protrudes outside from the (rear end side).

Here, the case member 9 has a substantially cylindrical shape, and has a bent portion 93 bent inward at one end.

On the other hand, the connector member 17 has a stepped portion 17b whose diameter is larger than that of the portion projecting to the outside.
The step portion 17b is configured to be hooked on the bending portion 93 and positioned.

After the connector member 17 is inserted in this manner, all of the various solenoid components are sequentially replaced with the case member 9.
The dimensions and shape of each component are set so that they can be inserted through the opening at the other end of the mold coil.
And the rod 7 are assembled in advance, and the packing 10, the shim 8, the center post 2, the bearing 13, and the bracket plate 12 are assembled in advance and integrated.

Here, the case member 9 is provided with a caulking projection 94 at an end opposite to the bent portion 93 described above. FIG. 1 shows a state after caulking is performed.

In a region where the caulking projection 94 is not provided, one surface of the bracket plate 12 is configured to abut on an edge thereof.

When the valve portion 100B is mounted after the bracket plate 12 is mounted, one end 16b of the valve sleeve 16 as a main body thereof is configured to abut on the other surface of the bracket plate 12.

In this state, the caulking projection 94 is caulked to the stepped portion 16a serving as the caulked portion of the valve sleeve 16, so that the solenoid constituent member, the bracket plate 12, and the valve portion 100B are positioned and fixed, and assembly is completed. Complete.

The caulking step will be described in more detail with reference to FIGS.

FIGS. 3A and 3B are schematic views for explaining the mounting of the case member and the bracket plate. FIG. 3A is a schematic plan view of the case member, FIG. 3B is a schematic plan view of the bracket plate, and FIG. FIG. 4D is a schematic plan view showing a state in which the bracket plate is mounted, FIG. 4D is a cross-sectional view taken along line AA in FIG. 5C, and FIG. 4 shows a modification of FIG.
Is a schematic plan view of a case member, (B) is a schematic plan view of a bracket plate, (C) is a schematic plan view of a state where the bracket plate is attached to the case member, and (D) is a BB cross section in (C). FIG. 5 is a schematic view showing a caulking step, and FIG. 6 is a schematic view showing a preferred embodiment of a caulking projection.

As shown in FIG. 3A, a plurality of cutouts (three cutouts in the illustrated example) are provided at the end of the cylindrical case member 9 so as not to be cutout. The portion is a projection 94 for swaging.

Accordingly, the inner peripheral surface 94 of the caulking projection 94
a has a curved surface shape.

On the other hand, as shown in FIG. 3B, a plurality (three in the illustrated example) of notch grooves are formed in the bracket plate 12 so as to correspond to the caulking projections 94. The groove bottom 12a of the cutout groove, which is a surface, has a curved shape that follows the curved shape of the inner peripheral surface 94a of the caulking projection 94 described above.

Accordingly, as shown in FIGS. 3 (C) and 3 (D), when the caulking projection 94 is fitted into the notch groove of the bracket plate 12, the inner peripheral surface 94a of the caulking projection 94 is formed. The outer peripheral surface (portion of the groove bottom 12a) of the bracket plate 12 is in a state in which the entire surface abuts.

Although not shown, at least a part of the outer peripheral surface of the stepped portion 16a to be the caulked portion of the valve sleeve 16 is also formed by the curved surface shape of the inner peripheral surface 94a of the above-described caulking projection 94. , And likewise, the entire surface comes into contact with it.

In this manner, the caulking is performed in a state where the curved inner peripheral surface 94a of the caulking projection 94 is in contact with at least a part of the outer peripheral surfaces of the bracket plate 12 and the valve sleeve 16. This can prevent backlash in the radial direction of the bracket plate 12 and the valve sleeve 16 with respect to the case member 9 (preventing misalignment), and the center post 2 integrated with the bracket plate 12 is eccentric to act on the plunger 1. It is possible to prevent the force from increasing, thereby reducing the hysteresis.

When the bracket plate 12 is attached to another element (a device to which the solenoid valve 100 is attached), the other element and the solenoid valve 1 are attached.
Position accuracy with respect to the center position of 00 can be improved.

In the illustrated example, since the end of the spool 15 has a spherical shape and this portion is in contact with the rod 7, the solenoid portion 100A and the valve portion 100B
Even if there is an inclination between the hysteresis and the inclination, the hysteresis can be further reduced.

In the illustrated example, the crimping projections 94 are provided.
Are provided at three locations evenly distributed, so that when caulking is performed, a caulking force acts evenly toward the center direction, so that axial misalignment can be reduced.

Further, in the example shown in FIG. 3, the case where the entire wall of the portion where the notch is not provided at the end of the cylindrical case member 9 is formed as a caulking projection 94 is shown. As shown in FIG. 4, it is also possible to leave a contact surface 94b with which the bracket plate 12 abuts on the inner peripheral side as a protrusion 94 for caulking only the outer peripheral side of the cylinder.

Next, the behavior of a caulking jig (die) and a caulking projection during caulking will be described with reference to FIG.

FIG. 5 is a partial cross-sectional view of a jig (die) for caulking, and one of each of a step portion 16 a serving as a caulked portion of the case member 9, the bracket plate 12, and the valve sleeve 16. 1A and 1B schematically show a partial cross-sectional view, in which FIG. 1A shows a state at the start of swaging and FIG.

As shown, a mold 5 for caulking is used.
00 is provided with an abutment surface 501 for contacting the tip of the caulking projection 94 and bending the caulking projection 94. The contact surface 501 is inclined in a curved shape.

When caulking is performed, the mold 500 is driven in the direction of arrow X in FIG. 5A with the bracket plate 12 and the valve sleeve 16 assembled.

As a result, first, the contact surface 501 comes into contact with the tip of the caulking projection 94 and is further driven in the X direction, so that the tip of the caulking projection 94 is brought into contact with the contact surface 501.
Thus, a component force is applied to the bracket plate 12 side and the inner diameter direction side.

Accordingly, the caulking protrusion 94 is provided in the position shown in FIG.
(A) It is bent inward as indicated by the middle arrow.

In this case, the caulking projection 94 is first fitted to the step portion 16 serving as the caulked portion of the valve sleeve 16.
Since the first corner 16c provided at a defines the starting position of the bend, the first corner 16c is bent starting from the first corner 16c.

When the bent portion is further bent, it comes into contact with a second corner portion 16d provided on a step portion 16a serving as a portion to be caulked of the valve sleeve 16, and while pressing the second corner portion 16d, the protrusion 94 for caulking is formed. Tip is valve sleeve 1
6 is bent to a position where it comes into contact with the inclined surface provided on the step portion 16a serving as the caulked portion.

Thus, by providing the first corner portion 16c, the bending position of the caulking projection 94 can be defined,
In addition, since the second corner portion 16d is provided, it is positively pressed toward the bracket plate 12 by the caulking protrusion 94, so that a sufficient caulking fixing force can be obtained.

In general, when caulking is performed, the tip of the caulked portion is caused by its own elastic restoring force.
The spring back that returns to the original slightly occurs.

That is, in the state shown in FIG.
The tip of the caulking projection 94 is in contact with an inclined surface provided on the step 16a of the valve sleeve 16, but thereafter,
Springback occurs due to its own elastic restoring force,
The tip is slightly returned to a position away from the inclined surface.

However, in the present embodiment, even if the tip is separated, the second corner portion 16d is kept pressed, so that a sufficient caulking fixing force is maintained.

As described above, according to the configuration of the present embodiment, it is possible to obtain a sufficient caulking fixing force even when the caulking load is relatively low.

Here, as shown in FIG. 6, a groove 94c may be provided as a preferred example of the caulking projection 94. At this time, the depth of the groove bottom of the groove 94c is set to be near (equal to or slightly deeper than) the position of the first corner portion in the step portion 16a to be the caulked portion of the valve sleeve 16. By doing so, when the caulking is performed, the rigidity of the caulking protrusion 94 becomes low.
It becomes easy to bend from the vicinity of the groove bottom of the groove 94c, and it is possible to prevent the bulging near the root of the caulking projection 94.

As described above, when performing the assembly work,
Since various members only need to be inserted or attached to the case member 9 in one direction, a step of inverting the case member during the assembling process is not required as compared with the conventional case of assembling from both directions. The number of man-hours can be reduced, and the complexity of the assembly operation can be eliminated. Also, caulking 1
It only needs to be done at the location.

Further, by performing the above-described caulking, one end of the valve sleeve 16 and one end of the bracket plate 1 are formed by the caulking protrusion 94 and the edge of the case member 9.
2, the valve sleeve 16 and the bracket plate 12 are positioned and fixed, and the connector member 17 is connected to the stepped portion 17 as described above.
b is positioned with respect to the bending portion 93, and the other solenoid components are positioned and fixed by being confined by the connector member 17 and the bracket plate 12.

At the time of caulking, the caulking protrusion 9
4 causes a caulking load to be applied to one end of the valve sleeve 16, and this load is applied to the bracket plate 12.
However, since the surface of the bracket plate 12 on the side opposite to the side receiving the load abuts against the edge of the case member 9, only the case member 9 receives the load and is included in the case member 9. The other solenoid components do not receive a caulking load.

Accordingly, the burden of considering the caulking load of various solenoid components is eliminated, and the burden of designing the dimensions and shape of each component is also reduced.

In particular, when the end of the case member on the connector member side is crimped as in the prior art, as described above, the end face is cut from the groove for mounting the seal member of the mold portion made of resin. In the present embodiment, no crimping load is applied, whereas this thickness (L in FIG. 1) is required.
1) can be made thinner.

Therefore, the size in the axial direction can be reduced, and the weight and size can be reduced.

Further, in the solenoid valve 100 according to the present embodiment, the case member 9 is constituted by the small diameter portion 91 and the large diameter portion 92, and this point will be described.

First, the O-ring 19 serving as a sealing member (seal ring) is in close contact with the inner peripheral surface of the small-diameter portion 91, and the end surface of the upper plate 11 is in contact with the small-diameter portion 91. Since the magnetic path is formed, the inner diameter accuracy and the surface condition accuracy are relatively large. In this case, the structure of the upper plate 11 is formed by a cylindrical portion and a flange portion having one end side of the cylindrical portion bent in the radial direction, and the end surface refers to the outer peripheral surface of the distal end of the flange portion. I have.

On the other hand, the large-diameter portion 92 is a portion where the requirements for inner diameter accuracy and the like are relatively small. The packing 10 is also in close contact with the inner peripheral surface of the large-diameter portion 92. The packing 10 has a structure that can sufficiently exhibit sealing performance against dimensional variations. Is omitted.

As described above, it is possible to reduce a manufacturing burden by reducing a portion requiring dimensional accuracy.

The inner diameter of the large diameter portion 92 is
By setting the size so that the outer peripheral surface of the O-ring 19 does not come into contact with the O-ring 19, it is possible to prevent the quality of the O-ring 19 from deteriorating.

That is, when assembling as described above, the connector member 17 is inserted through the opening at the other end of the case member 9, and the O-ring 19 is inserted into the mounting groove of the connector member 17. Since the insertion operation is performed in the mounted state, the inner diameter of the large-diameter portion 92 on the insertion side is set as described above so that the O-ring 19 reaches the small-diameter portion 91 during insertion. Furthermore, since it is possible to prevent the inner peripheral surface of the large diameter portion 92 from being rubbed, it is possible to prevent the quality of the O-ring 19 from deteriorating.

Next, a preferred application example of the solenoid valve 100 according to the present embodiment will be described.

In an engine such as an automobile, the intake and exhaust valves of the engine are opened and closed by rotation of a camshaft. Fuel efficiency is improved by appropriately controlling the valve timing depending on the operating state (high speed / low speed). In addition, high exhaust gas purification can be obtained.

The control of the valve timing can be performed by shifting the camshaft in the rotation direction to change the phase, and a technique of performing this by a solenoid valve is known as a known technique.

Here, in order to shift the camshaft in the rotation direction, hydraulic control by a solenoid valve is performed. However, a solenoid valve is installed on the path of the engine oil flow path due to the arrangement space and the like. It is common to use engine oil.

Conventionally, by using a solenoid valve that performs on / off control, control has been performed in two types of states, that is, high speed and low speed. A solenoid valve capable of linear control is used.

Therefore, the above-described solenoid valve according to the embodiment of the present invention can be suitably used as such a linear control solenoid valve for valve timing control (VTC).

[0095]

As described above, according to the present invention, all the members can be assembled in one direction to the case member, and only one caulking is required, so that the number of assembling steps can be reduced. Since it becomes possible and the complexity of the assembly work can be eliminated, the assembly workability is improved.

Further, the compatibility is excellent, and the load on the connector member when caulking is small.

Further, if the case is divided into a small-diameter portion and a large-diameter portion which are closely adhered to each other by the seal ring, the outer periphery of the seal ring can be prevented from rubbing against the inner periphery of the large-diameter portion of the case during assembly. In addition, quality deterioration of the seal ring can be prevented.

Also, the bracket plate and one end of the valve are sandwiched and fixed between the caulking projection and a part of the edge on the other end side of the case member so that the members are positioned and fixed. By doing so, it is possible to prevent a caulking load when caulking is performed on various members included in the case member. Furthermore, by contacting one end of the upper plate with the inner peripheral surface of the small-diameter portion of the case, the portion requiring dimensional accuracy can be limited to a part.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a configuration of a solenoid valve according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a solenoid valve according to the embodiment of the present invention.

FIG. 3 is a schematic diagram illustrating attachment of a case member and a bracket plate.

FIG. 4 is a schematic view showing a modification of FIG. 3;

FIG. 5 is a schematic view showing a caulking step.

FIG. 6 is a schematic view showing a preferred embodiment of a caulking projection.

FIG. 7 is a schematic sectional view of a configuration of a solenoid valve according to a conventional technique.

FIG. 8 is a part of a schematic configuration sectional view of a solenoid valve according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plunger 2 Center post 3 Coil 4 Sleeve 5 Mold coil subassy 6 Bobbin 7 Rod 8 Shim 9 Case member 91 Small diameter part 92 Large diameter part 93 Bent part 94 Protrusion 94a Inner peripheral surface (of protrusion) 94b Contact surface 94c Groove 10 Packing 11 Upper plate 12 Bracket plate 12a Groove bottom 13 Bearing 14 Spring 15 Spool 16 Valve sleeve 16a Step 16b (One end of valve sleeve) 16c First corner 16d Second corner 17 Connector member 17a Terminal 17b Step 18 E-shaped Ring 19 Seal ring 100 Solenoid valve 100A Solenoid part 100B Valve part 500 Mold 501 Contact surface

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshinari Kasaki 4-3-1 Tsujido Shinmachi, Fujisawa-shi, Kanagawa F-term in NOK Corporation (reference) 3H106 DA03 DA08 DA23 DB02 DB12 DB23 DB32 DC09 DC19 DC20 DD09 EE35 GA01 GA06 GA23 GC25 JJ04 JJ05 KK17

Claims (3)

[Claims] 1. A substantially cylindrical case member having a bent portion bent inward at one end, and a step which is inserted into the hollow interior from the other end of the case member and positioned at the bent portion. Part, and
A connector member having a connector portion protruding outside from one end of the case member, and various solenoid constituent members sequentially inserted into the hollow interior from the other end of the case member after the connector member is inserted, A valve to be attached after these various solenoid components are inserted, and the other end of the case member, the valve and the various solenoid components in a state where the valve is attached Solenoid valve characterized by providing a crimping projection for assembly. 2. A seal ring is provided at one end of the case so as to be in close contact with the inner peripheral surface of the case, and the case is at one end of the case and is closely attached to the seal ring. 2. The solenoid according to claim 1, wherein a region including the portion is a small-diameter portion, and the other end of the case is a large-diameter portion that does not contact the outer peripheral surface of the seal ring. 3. valve. 3. A bracket in which a bracket for attaching a solenoid valve body to another element and a plate on the valve side forming a magnetic path between the case member and the solenoid component are integrally formed. A plate, wherein one end of the valve is in contact with one surface of the bracket plate, and a part of the other end of the case member is in contact with the other surface, The crimping projection and a part of the edge on the other end side of the case member sandwich and fix the bracket plate and one end of the valve, thereby assembling, and the solenoid component member includes: One end is in contact with the inner peripheral surface of the case, and an upper plate that forms a magnetic path is included. One end of the upper plate is in contact with the inner peripheral surface of the small diameter portion of the case. Solenoid valve according to claim 1 or 2, characterized in Rukoto.