JP2000055228A - Solenoid valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily detach only a solenoid valve from a member to be fitted by attaching one end of a snap fit part to the outer circumferential side of a solenoid valve and by providing a folding part folded from the solenoid valve outer circumferential side to the axial inverse side to the other end. SOLUTION: A snap fit part 9 is integrally formed with a connector 12 outside a yoke in forming the connector 12 and extended from the end side of a fixing member axially to a movable member via a prescribed interval, and an air cleaner, or a member to be fitted is pinched between the snap fit part 9 and the yoke 7 so that a solenoid valve 1 is attached to the air cleaner. Then, the tip of the snap fit part 9 is so formed that the solenoid valve 1 is not drawn out from the air cleaner and a folding part 9b folded from the outer circumferential side of the solenoid valve 1 toward the end of the fixing member is formed. This constitution can easily detach the solenoid valve 1 from the air cleaner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve, and more particularly to a structure for suppressing a problem caused by vibration of a solenoid valve.

[0002]

2. Description of the Related Art A conventional solenoid valve is disclosed in
There is a technique disclosed in US Pat. FIG. 5 shows a sectional view of the solenoid valve disclosed in the publication. This publication includes an exterior member 31 made of a synthetic resin material.
Elastic piece 32 having a claw portion 32a for mounting a solenoid valve on the outside of
Are provided integrally, and a solenoid valve 30 is disclosed in which a projection 32b that is pressed into contact with a member to be mounted is integrally provided on a part of the mounting surface of the elastic piece 32.

According to the solenoid valve, the elastic piece 32 has the protrusion 3
By providing 2b, attachment to a member to be attached can be performed reliably.

[0004]

However, in the above-described prior art, the vibration in the axial direction of the solenoid valve is compensated by the elastic piece, but is not compensated when the solenoid valve vibrates in a direction other than the axial direction. Therefore, the solenoid valve may vibrate and resonate, and the resin member or the like may be worn, and in some cases, the solenoid valve may come off. Further, in the related art, it is easy to attach the solenoid valve to the member to be mounted by using the elastic piece. Since it is difficult to remove the valve from the member to be mounted, the entire assembly including the solenoid valve must be replaced in some cases, which is disadvantageous in cost.

[0005] In view of the above, an object of the present invention is to provide a solenoid valve in which an optimal measure is taken against a problem caused by vibration in order to solve the above problems.

[0006]

According to a first aspect of the present invention, there is provided a solenoid coil wound around a bobbin, a fixing member of a magnetic material provided in the solenoid coil, and a fixing member. And a movable member of a magnetic body having a valve body for controlling the flow of fluid by reciprocating in the magnetic gap, and a holder and a fixed member formed on the outer peripheral side of the solenoid coil. A solenoid valve comprising a yoke made of a magnetic material integrally provided with a flange supporting the end on the opposite side of the movable member, and a magnetic plate disposed between the holder of the yoke and the movable member. In order to attach the solenoid valve to the member to be attached, one end is attached to the outer peripheral side of the solenoid valve and extends toward the mounting direction with a predetermined interval from the outer peripheral surface of the solenoid valve, and from the outer peripheral side of the solenoid valve. Axial opposite side The solenoid valve is provided with a snap-fit part having a folded part folded at the other end.

According to the first aspect, the mounted member is fitted into the predetermined distance between the snap fit portion and the outer periphery of the solenoid valve, so that the solenoid valve is mounted on the mounted member. At the other end of the snap-fit part, a turn-back part is provided. It can be removed from the mounting member. In this manner, only the solenoid valve can be easily removed from the member to be mounted, so that when the solenoid valve fails, for example, when the solenoid valve fails due to vibration, only the solenoid valve can be replaced.

The snap-fit portion may be formed by using a yoke as a spring material. However, if the snap-fit portion is formed of a resin for molding the solenoid coil, it can be formed easily and can utilize the elastic force of the synthetic resin. Therefore, it is preferable.

According to a third aspect of the present invention, there is provided a solenoid coil wound around a bobbin, a fixing member of a magnetic material provided in the solenoid coil, and a fixing member provided via a magnetic gap with the fixing member. A movable member made of a magnetic material having a valve body for controlling the flow of fluid by reciprocating, and a flange portion supporting an end of the solenoid member opposite to the movable member of the holder and a fixed member formed on the outer peripheral side of the solenoid coil A yoke made of a magnetic material integrally provided with a yoke, and a plate of a magnetic material provided between the holder of the yoke and the movable member. In order to restrict the movement of the solenoid valve, a contact portion capable of contacting the member to be mounted is provided on the outer periphery of the solenoid valve.

When the solenoid valve is mounted on the member to be mounted, the solenoid valve may vibrate in various directions due to various factors such as movement of the member itself. According to the third aspect of the present invention, by providing a contact portion on the outer periphery of the solenoid valve that can contact the member to be mounted, it is possible to suppress vibrations in all directions of movement, and to suppress malfunction of the solenoid valve due to the vibration as much as possible. Becomes possible.

The contact portion is formed integrally with a snap-fit portion having one end attached to the outer peripheral side of the solenoid valve and extending in the axial direction at a predetermined distance from the outer peripheral surface of the solenoid valve. Alternatively, the yoke is formed by bending the yoke.

The invention of claim 6 is the invention of claims 1 to 5
In the above, the rib is formed on at least one of the holder portion and the flange portion of the yoke.

In an electromagnetic valve having a structure in which the movable member comes into contact with the bobbin when the electromagnetic valve is operated, the vibration generated by the contact of the movable member is transmitted from the yoke to the air via the plate, and It becomes an operation sound. In claim 6,
Since the rigidity of the yoke is improved by forming the ribs on the yoke, the vibration caused by the operation of the solenoid valve is reduced on the yoke, and the operation noise of the solenoid valve is reduced.

According to a seventh aspect of the present invention, in the sixth aspect, a first rib extending in the movable direction of the movable member is formed on the holder of the yoke, and the second rib is formed on the flange along the first rib. Is formed.

According to the present invention, since the first rib and the second rib are provided, the rigidity of the yoke in the movable direction of the movable member is improved, so that the operation sound of the solenoid valve is reduced.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A solenoid valve 1 according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a sectional view of a solenoid valve 1 of the present embodiment.

The solenoid valve 1 is provided with a solenoid coil 3 wound around a bobbin 2, a fixed member 4 of a magnetic material provided in the solenoid coil 3, and a fixed member 4 and a magnetic gap 5 interposed therebetween. A movable member 6 made of a magnetic material having a valve body 6a for controlling the flow of fluid by reciprocating in a magnetic gap 5, a holder 7a formed on the outer peripheral side of the solenoid coil 3, and a movable member 6 of a fixed member 4; A yoke 7 made of a magnetic material integrally provided with a flange portion 7b supporting an end opposite to the above, and a plate 8 of a magnetic material provided between the holder portion 7a of the yoke 7 and the movable member 6; Have.

The solenoid valve 1 according to the present embodiment is used as an evaporation purge solenoid valve used to guide fuel vapor generated in a fuel tank (not shown) to an intake system of an internal combustion engine, and adsorbs evaporation gas. The evaporative gas is communicated and blocked between a housing 15 that communicates the canister and an intake pipe (both not shown) of the engine, and is attached to an air cleaner 11 which is a member to be attached. The current flowing through the solenoid coil 3 is controlled by a CPU (not shown), and the CPU controls the energization of the solenoid valve 1 according to various conditions to open and close the solenoid valve 1, thereby discharging and shutting off the evaporative gas to the intake pipe. Control.

The housing 15 is made of a synthetic resin and has an inlet port 13 on the canister side and an outlet port 14 on the intake pipe side.
The elastic member 16 is disposed between the fixed member 4 and the movable member 6 so that the movable member 6 blocks the outflow port 14 when the solenoid coil 3 is not energized.
Although the cross-sectional view of FIG. 1 is a cross-sectional view for facilitating the description of the internal configuration of the solenoid valve 1 and the inflow port 13 and the outflow port 14, the inflow port 13 and the outflow port 14 are actually It is formed in the direction shown in FIG. 2 and FIG. Further, in the present embodiment, the directions of the inflow port 13 and the outflow port 14 in the housing 15 are configured to be opposite to each other.
The direction of the inflow port 13 and the outflow port 14 can be arbitrarily designed, for example, the direction of the inflow port 13 is the same as that of the inflow port 13.

The snap-fit portion 9 for mounting the solenoid valve 1 on the air cleaner 11 will be described with reference to FIGS. FIG. 2 is a side view of the solenoid valve 1 according to the present embodiment, and FIG. 3 is an enlarged view of the snap-fit portion 9.
The snap-fit portion 9 is formed integrally with the connector 12 outside the yoke 7 when the connector 12 is formed, and the movable member 6 is axially spaced from the end of the fixed member 4 at a predetermined interval.
The solenoid valve 1 is easily attached to the air cleaner 11 by extending to the side and sandwiching the air cleaner 11 between the snap-fit portion 9 and the yoke 7. A notch 9a is formed at the tip of the snap fit portion 9 so that the electromagnetic valve 1 does not come off from the air cleaner 11, and a folded portion 9b that is folded from the outer peripheral side of the electromagnetic valve 1 toward the end of the fixing member 4. Are formed. According to this configuration,
When the solenoid valve 1 is out of order, a screwdriver is inserted into the turn-back portion 9b of the snap-fit portion 9 and the tip of the driver is extended toward the outer periphery of the solenoid coil 3 in the outer circumferential direction of the solenoid valve 1 so that the snap-fit portion 9 is connected to the air cleaner 11. Can be removed from. In this way, the provision of the folded portion 9b in the snap fit portion 9 makes it possible to easily remove the solenoid valve 1 from the air cleaner 11.

Next, a description will be given of a structure taken to suppress the vibration of the solenoid valve 1 with respect to the air cleaner 11 caused by the vibration of the engine or the vibration transmitted from the road surface when the vehicle is running. A portion where the electromagnetic valve 1 contacts the air cleaner 11 when the electromagnetic valve 1 is attached to the air cleaner 11 will be described. A portion of the yoke 7 is curved in a direction away from the solenoid valve 1 from the end of the snap-fit portion 9 side surface of the solenoid valve 1 to form a contact portion 10, and the contact portion 10 has two points in the figure. The air cleaner 1 of the solenoid valve 1 is bent so as to be in contact with the air cleaner 11 indicated by a chain line.
Suppress vibration against 1.

A rubber 17 is attached to a surface of the movable member 6 which comes into contact with the outflow port 14, and absorbs an impact when the movable member 6 comes into contact with the outflow port 14 when the solenoid valve 1 is operated. . A leaf spring 1 having an outer peripheral portion attached to a bobbin 2 is provided on the peripheral surface of the movable valve body in order to restrict the movement in the rotational direction while allowing only the axial movement of the movable valve body.
8 are attached.

FIG. 4 is an A view of FIG. A first rib 7c extending in the movable direction of the movable member 6 is formed on the holder portion 7a of the yoke 7, and a second rib 7d is formed on the flange portion 7b along the first rib 7c. . These ribs 7
Since the rigidity of the yoke 7 is improved by c and 7d, the vibration transmitted from the yoke 7 to the air via the plate 8 by the contact of the movable member 6 is reduced on the yoke 7, and the operating noise of the solenoid valve 1 is reduced. Can be smaller. In the present embodiment, the rib 7c is formed along the movable direction of the movable member 6, but even if the rib is formed in a direction other than this direction, it is possible to suppress the vibration transmitted from the yoke 7 into the air.

The operation of the solenoid valve 1 will be described. A terminal 19 that is electrically connected to the solenoid coil 3 is provided in the connector 12. When current is supplied to the terminal 19, the solenoid coil 3 is magnetized, and the fixed member 4, the movable member 6, the plate 8, and the yoke 7 forms a magnetic circuit. The elastic member 1 has a suction force for sucking the movable member 6.
When the elastic force of the elastic member 6 and the elastic force of the plate spring 18 in the axial direction become larger, the movable member 6 moves toward the fixed member 4 and opens the outflow port 14. When the outflow port 14 is opened, the inflow port 13 and the outflow port 14 communicate with each other, and the fluid introduced from the inflow port 13 is discharged through the outflow port 14. At this time, the connecting portion between the movable member 6 and the leaf spring 18 comes into contact with the end of the bobbin 2, and the vibration is transmitted from the plate 8 to the yoke 7. At this time, the rib 7 of the yoke 7
By virtue of c and 7d, the vibration is suppressed and the operating noise is reduced.

Although the present invention has been described with reference to the embodiment, the present invention is not intended to be limited to the above-described embodiment, but may be any form in accordance with the gist of the present invention. A solenoid valve may be used.

[0026]

According to the first aspect, the folded portion is provided on the outer peripheral side of the end of the snap-fit portion 9, so that an elongated rod such as a screwdriver is inserted into the folded portion, and the end of the snap-fit portion is connected to the solenoid coil. The snap-fit part can be removed from the member to be mounted by expanding the outer peripheral side. This makes it possible to easily remove only the solenoid valve from the member to be mounted, so that when the solenoid valve fails, only the solenoid valve can be replaced.

According to the second aspect, it is preferable to form the snap-fit portion with the resin for molding the solenoid coil, since the snap-fit portion can be easily formed and the elastic force of the synthetic resin can be utilized.

According to the third aspect of the present invention, by providing a contact portion on the outer periphery of the solenoid valve which can contact the member to be mounted, vibration of the solenoid valve in various directions can be suppressed, and the problem of the solenoid valve due to the vibration can be reduced. It becomes possible to suppress as much as possible.

According to the fourth aspect, since the contact portion is provided in the snap-fit portion, the contact portion can be formed at the same time when the snap-fit portion is formed. For example, when the snap-fit portion is formed of resin, The contact portion can also be easily formed, which is preferable.

According to the fifth aspect, since the contact portion is formed by bending the yoke made of the magnetic material, the situation in which the contact portion is deformed due to thermal expansion or the like is reduced as much as possible.

According to the sixth aspect, since the yoke is provided with the first rib and the second rib, the rigidity of the yoke is improved, so that the vibration caused by the operation of the solenoid valve is reduced on the yoke, and the vibration of the solenoid valve is reduced. Operating noise is reduced.

[Brief description of the drawings]

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

FIG. 2 is a side view of the solenoid valve according to the embodiment of the present invention.

FIG. 3 is an enlarged view of a snap fit part.

FIG. 4 is a view as viewed from A in FIG. 2;

FIG. 5 is a view showing a conventional solenoid valve.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Solenoid valve 2 ... Bobbin 3 ... Solenoid coil 4 ... Fixed member 5 ... Magnetic gap 6 ... Movable member 7 ... Yoke 8 ... Plate 9 ... Snap Fit part 10 ・ ・ ・
Contact part 11 ... Air cleaner (attached member) 12 ...
Connector 13 ... Inflow port 14 ...
Outflow port

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takashi Kato 2-3-3 Showa-cho, Kariya-shi, Aichi F-term in Ishin Engineering Co., Ltd. (Reference) 3H051 BB02 BB03 BB10 CC06 CC13 CC17 DD07 EE08 3H106 DC02 EE19 EE20 EE33 EE34 EE35 GA03 GA21 GA30 GB01 GC29 JJ02 JJ05

Claims (7)

[Claims] 1. A solenoid coil wound on a bobbin, a fixing member of a magnetic body disposed in the solenoid coil, and a reciprocating member disposed in the magnetic gap with the fixing member via a magnetic gap. A movable member of a magnetic material having a valve body for controlling the flow of fluid by moving; a holder formed on the outer peripheral side of the solenoid coil; and a flange supporting an end of the fixed member on the opposite side to the movable member. And a plate of a magnetic material disposed between the holder of the yoke and the movable member, wherein the electromagnetic valve is attached to a member to be mounted. For mounting, one end is attached to the outer peripheral side of the solenoid valve and extends toward the mounting direction with a predetermined interval from the outer peripheral surface of the solenoid valve, and a folded portion that is folded from the outer peripheral side of the solenoid valve to the opposite side in the axial direction is provided. other An electromagnetic valve comprising a snap-fit portion provided at an end. 2. The solenoid valve according to claim 1, wherein the snap-fit portion is formed of a resin for molding the solenoid coil. 3. A solenoid coil wound around a bobbin, a fixing member of a magnetic body disposed in the solenoid coil, and disposed via a magnetic gap with the fixing member, and reciprocated in the magnetic gap. A movable member of a magnetic material having a valve body for controlling the flow of fluid by moving; a holder formed on the outer peripheral side of the solenoid coil; and a flange supporting an end of the fixed member on the opposite side to the movable member. And a plate made of a magnetic material disposed between the holder of the yoke and the movable member. A member to be attached to which the electromagnetic valve is mounted. An electromagnetic valve having a contact portion on the outer periphery of the electromagnetic valve, the contact portion being capable of contacting the mounted member in order to restrict the movement of the electromagnetic valve. 4. A snap-fit portion having one end attached to the outer peripheral side of the solenoid valve and extending in the axial direction at a predetermined distance from the outer peripheral surface of the solenoid valve, for attaching the solenoid valve to a member to be attached, The solenoid valve according to claim 3, wherein a contact portion is provided on the snap-fit portion. 5. The solenoid valve according to claim 3, wherein the contact portion is formed by bending a yoke. 6. The solenoid valve according to claim 1, wherein a rib is formed on at least one of the holder and the flange of the yoke. 7. A first rib extending in the movable direction of the movable member is formed on the holder of the yoke, and a second rib is formed on the flange along the first rib. 7. The solenoid valve according to claim 6, wherein: