JPH083796Y2 - solenoid valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a solenoid valve.

[Conventional technology]

A metallic cylindrical member extending along the axis of the housing and a metallic valve body that can be seated on a valve seat formed at the tip of the cylindrical member are arranged in the housing, and the valve body is driven by a solenoid. A solenoid valve adapted to do so is known (see Japanese Utility Model Laid-Open No. 62-2877). In this solenoid valve, in order to reduce the collision noise between the valve body and the valve seat, a metal valve seat is fixed to a tubular member through a cushioning member, and the valve body is divided into two at the intermediate portion in the axial direction. A cushioning member is inserted between them.

[Problems to be solved by the device]

However, in this solenoid valve, although the collision sound is slightly reduced by forming the cushioning material layer, there is a problem that a large collision sound is still generated due to the collision between the metal valve seat and the metal valve body. is there. Further, since the cushioning member has to be baked and fixed between the valve seat and the tubular member and between the two divided valve body portions, the manufacturing cost is high, and if the cushioning member is attached in such a manner, the cushioning member is attached. However, there is a problem in that good durability cannot be obtained as a result.

[Means for solving the problem]

In order to solve the above-mentioned problems, according to the present invention, a synthetic resin cylindrical portion extending from the end of the housing in the axial direction of the housing is formed in the synthetic resin housing, and the cylindrical portion is formed in the housing. In a solenoid valve in which a valve body that can be seated is arranged on a valve seat formed at the tip, and the valve body is driven by a solenoid, a synthetic resin housing that corresponds to the extension of the base of the synthetic resin cylindrical part A metal plate extending in a direction perpendicular to the housing axis is disposed coaxially with the housing axis in the end portion.

[Action]

Since the valve body is seated on the synthetic resin valve seat, the collision noise is reduced. Further, by arranging the metal plate at the end of the housing, the vibration of the end of the housing is suppressed, so that the collision noise emitted through the end of the housing is suppressed, and moreover, it is directed outward along the tubular portion. Collision noise is reduced because the propagating sound is shielded by the metal plate.

〔Example〕

Referring to FIG. 1, 1 is a synthetic resin housing main body, 2 is a synthetic resin housing, 3 is a synthetic resin solenoid bobbin, 4 is a solenoid, 5 is a stator core,
Reference numeral 6 denotes a movable core, and 7 denotes a valve body connected to the movable core. Inside the housing 2, a synthetic resin cylindrical portion 8 extending from the housing end portion 2a in the axial direction of the housing 2 is formed. The cylindrical portion 8 has a valve port 9 formed therein.
And a valve seat 10 formed at the tip thereof. Disc 7
Is arranged in the housing 2 so as to be movable in the axial direction of the housing 2, and the valve body 7 is arranged so that it can be seated on a valve seat 10. A compression spring 11 held by the stator core 5 is inserted between the stator core 5 and the movable core 6, and the spring force of the compression spring 11 urges the valve element 7 toward the valve seat 10. An annular metal plate 12 for forming a magnetic path is arranged in the solenoid bobbin 5, and a yoke 13 for similarly forming a magnetic path is arranged on the outer peripheral surface of the housing body 1. Therefore, when the solenoid 4 is excited, the stator core 5, the movable core 6, the annular metal plate
A magnetic circuit is formed by 12 and the yoke 13. At this time, since the movable core 6 is attracted toward the stator core 5, the valve body 7 separates from the valve seat 10, abuts on the stator core 5, and stops. Thus, the valve port 9 is opened. On the other hand, when the solenoid 4 is in the non-excited state, the valve body 7 is seated on the valve seat 10 by the spring force of the compression spring 11, and thus the valve port 9 is closed. A diaphragm 14 for holding the valve body 7 at a proper position is attached between the valve body 7 and the housing body 1, and an inner end portion of the diaphragm 14 is fixed to the valve body 7 with an epoxy adhesive or the like. It

An annular metal plate 15 extending in a direction perpendicular to the axis of the housing 2 is arranged coaxially with the axis of the housing 2 in the housing end 2a corresponding to the extension of the root of the cylindrical portion 8. The metal plate 15 is made of a relatively heavy metal material such as iron or lead, and the metal plate 15 has a diameter equal to or slightly larger than the diameter of the chamber 16 formed around the cylindrical portion 8. . A port 17 communicating with the valve port 9 and a port 18 communicating with the chamber 16 are formed in the housing 2.
One of these ports 17, 18 is used as an input port and the other is used as an output port.

As described above, the cylindrical portion 8 is formed of a synthetic resin material, and therefore, when the valve body 7 is seated on the valve seat 10, a large collision noise does not occur. Further, when the valve body 7 is seated on the valve seat 10, the cylindrical portion 8 vibrates, and a collision sound is transmitted in a vibrating form through the cylindrical portion 8 to the housing end 2a. However, since the heavy metal plate 15 is arranged in the housing end portion 2a, the vibration of the housing end portion 2a is suppressed, and thus the collision noise emitted through the housing end portion 2a is suppressed. It will be. On the other hand, the collision sound of the valve body 7 and the valve seat 10 propagates in all directions on one side, but a part of the sound is transmitted to the outside through the cylindrical portion 8 in the form of vibration, and therefore the volume of sound transmitted to the outside through the housing end 2a Is the largest. However, the sound transmitted through the housing end 2a to the outside is blocked by the metal plate 15, so that the collision sound is suppressed from being emitted to the outside.

In the embodiment shown in FIG. 1, the metal plate 15 is cast when the housing 2 is cast. Metal plate as shown in FIG.
A pair of notches 19 are formed on the outer peripheral edge of the notch 15, and the inside of the notches 19 is filled with resin when the housing 2 is molded. As a result, the metal plate 15 is prevented from rotating, and further the metal plate 15 is prevented from moving inside the housing 2. Therefore, since the metal plate 15 itself does not vibrate in the housing 2, there is no risk that vibration noise is generated by the metal plate 15 itself. In the embodiment shown in FIG. 1, the metal plate 15 has an annular shape, and the center hole 15a of the metal plate 15 is filled with synthetic resin. When the metal plate 15 is cast in the housing 2, the synthetic resin portion in the center hole 15a is preformed in the form of the protrusion 2b, and the center hole 15 of the metal plate 15 is formed in the protrusion 2b.
A is fitted and the metal plate 15 is supported by the projections 2b to form a mold. That is, the protrusion 2b serves as a guide for accurately aligning the metal plate 15 with the central axis of the housing 2. In other words, the metal plate 15 has a central hole 15
By forming a, the metal plate 15 can be accurately aligned on the central axis of the housing 2, and thereby the collision noise emitted to the outside can be blocked well.

 3 to 5 show different embodiments respectively.

In these embodiments, components similar to those in FIG. 1 are designated by the same reference numerals.

Referring to FIG. 3, in this embodiment the housing end 2a
A groove 2c is formed on the upper part of the housing 2 so as to be coaxial with the axis of the housing
The metal plate 15b is fitted in the groove 2c. This metal plate 15b
Is fixedly held in the groove 2c by the snap ring 20.

Referring to FIG. 4, in this embodiment the housing end 2a
A groove 2c is formed on the upper part of the housing 2 so as to be coaxial with the axis of the housing
A protrusion 2d is formed in the center of the groove 2c coaxially with the axis of the housing 2.
Is formed. The metal plate 15c has a center hole 15d in the center thereof, and the metal plate 15c is fitted in the concave groove 2c while fitting the center hole 15d in the protrusion 2d. The metal plate 15c is fixedly held in the concave groove 2c by the snap ring 21 attached to the protrusion 2d.

Referring to FIG. 5, in this embodiment the housing end 2a
In addition to the metal plate 15 disposed inside, a metal cylindrical body 22 is further attached on the inner peripheral surface of the housing 2 around the cylindrical portion 8. By providing such a metal cylindrical body 22, the vibration of the housing 2 can be further suppressed, and further, the collision sound of the valve body 7 and the valve seat 10 can be further suppressed from being emitted to the outside.

[Advantages of the Invention] According to the present invention, first, by forming the tubular portion from a synthetic resin material, the collision sound itself between the valve body and the valve seat can be reduced. Secondly, by arranging a metal plate in the housing end part on the extension of the base part of the tubular part, it is possible to suppress the vibration of the housing end part by the weight of the metal plate, and thirdly, by the metal plate. It is possible to block the sound transmitted to the outside through the shaped portion. According to the present invention, the collision sound emitted to the outside between the valve body and the valve seat can be greatly suppressed by the above three effects.

[Brief description of drawings]

Fig. 1 is a side sectional view of the solenoid valve, and Fig. 2 is II-II of Fig. 1.
FIG. 3 is a side sectional view of another embodiment, FIG. 4 is a side sectional view of yet another embodiment, and FIG. 5 is a side sectional view of yet another embodiment. . 2 ... Housing, 4 ... Solenoid, 5 ... Stator core, 6 ... Movable core, 7 ... Valve body, 8 ... Cylindrical part, 10
…… Valent seat, 15,15b, 15c …… Metal plate.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 62-113977 (JP, A) actual development Sho 59-141271 (JP, U) actual development Sho 60-26382 (JP, U) actual development Sho 60- 123468 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A valve formed in a housing made of synthetic resin, wherein a cylindrical portion made of synthetic resin extending from an end portion of the housing in an axial direction of the housing is formed, and at the tip of the cylindrical portion in the housing. A solenoid valve in which a seatable valve element is disposed on a seat, and the valve element is driven by a solenoid, wherein a housing is provided in an end portion of the synthetic resin housing corresponding to an extension of a root portion of the synthetic resin tubular portion. A solenoid valve in which a metal plate extending in the direction perpendicular to the axis is arranged coaxially with the housing axis.