JP3025372B2 - Silent solenoid valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve for opening and closing a flow passage, for example, a flow passage such as a fuel evaporative gas passage from a float chamber of a vaporizer.

[0002]

2. Description of the Related Art Conventionally, as a solenoid valve for opening and closing a flow passage, for example, as disclosed in Japanese Patent Application Laid-Open No. 62-75182, a valve seat 10 formed on a fluid passage 4 between an inlet port 2 and an outlet port 3 is known. The valve body 6 integrally formed with the rod 5 integrally attached to the plunger 7 of the electromagnet is positively moved along the axis of the stator 8 of the electromagnet by the urging force of the second spring 12 and the driving of the electromagnet in the direction perpendicular to the plane of FIG. Reciprocally mounted,
Further, an electromagnetic valve is shown in which a seal member 6b that comes into contact with the valve seat 10 is attached to the valve body 6.

[0003]

In this case, when the electromagnet is turned on when the valve body 6 is in the valve-open state where the electromagnet is in contact with the end face of the stator 8 by the urging force of the second spring 12, the plunger 7 is turned off. (2) The sealing member 6 of the valve body 6
b contacts the valve seat 10 to close the valve, but at this time, the plunger 7 also contacts the end face of the stator 8 to generate a metallic impact sound, or the plunger 7 and the stator to prevent the impact sound from being generated. When an air gap or a spacer or the like for forming an air gap is interposed between the end faces of the electromagnet 8, there is a disadvantage that the attraction performance of the electromagnet is greatly reduced. Next, when the electromagnet is turned off in this valve closed state,
The valve body 6 is brought into contact with the end face of the stator 8 by the biasing force of the second spring 12 together with the plunger 7 to open the valve. However, the valve body 6 is made of hard resin or metal, and the upper stator 8 is made of metal. Because of this, when the valve body 6 comes into contact with the stator 8 by the urging force of the second spring 12, there is a disadvantage that a high metallic sound is generated as an impact sound. As a countermeasure, for example, an impact sound absorbing elastic member such as a seal member 6b can be attached to one surface of the valve body 6 and the stator 8 which are in contact with each other. There is a drawback that the performance of the electromagnet is greatly reduced. SUMMARY OF THE INVENTION It is an object of the present invention to provide a muffling type solenoid valve capable of greatly reducing the sound generated when the solenoid valve operates without reducing the performance of the electromagnet.

[0004]

According to the present invention, a plunger reciprocates in a direction perpendicular to a plane of a valve seat formed on a communication passage connecting a fluid inlet and a fluid outlet of a valve body. An electromagnetic solenoid attached to the valve body as described above, and a valve body attached reciprocally with the outer periphery of the guide core of the plunger as a guide,
It said valve seat and the front is attached to the valve body and integral
A serial core and valve elastic member located between said plunger, a return spring for urging the <br/> valve body valve opening direction there between said valve body and said valve body, said return and a holding spring for urging the plunger in the valve closing direction by a weak biasing force than spring, the valve closing elastic portion
The plan material is pushed by the biasing force of the holding spring.
With the distal end surface of the jaw in contact with the valve seat,
Close the valve in contact and open the valve in contact with the core
It is a silence type solenoid valve characterized by the following. Elastic for valve opening and closing
The members are attached together with the members burned to the valve body
Good to be.

[0005]

In the silence type solenoid valve configured as described above,
When the solenoid is turned on in the open state of the electromagnetic solenoid, which is in contact with the end face of the plunger due to the biasing force of the return spring, the valve opening / closing elastic member integrated with the valve body resists the biasing force of the return spring of the plunger. By the suction movement, the valve opening / closing elastic member of the valve body contacts the valve seat to close the valve, but in this case, since the end face of the plunger is in contact with the valve opening / closing elastic member,
It is necessary to ensure that the plunger is sufficiently sucked by the electromagnetic solenoid in a state in which impact noise is prevented without interposing a spacer or the like for forming an air gap between the end surface of the plunger and the end surface of the core. it can.
Next, when the electromagnetic solenoid is turned off in this valve closed state, the valve body moves together with the plunger in the valve opening direction by the urging force of the return spring, and the valve opening / closing elastic member is brought into contact with the end faces of the plunger and the core. The valve is opened. At this time, no impact sound is generated even if the valve opening / closing elastic member collides with the end faces of the plunger and the core.

[0006]

As a result, the present invention has an effect that the operating noise generated when the valve is turned ON / OFF can be significantly reduced while the suction performance of the plunger by the electromagnetic solenoid is sufficiently ensured. .

[0007]

Next, the structure of an embodiment of the present invention will be described with reference to the drawings. Fluid inlet 2 and fluid outlet 3 of valve body 1
An electromagnetic solenoid 7 is attached to a position perpendicular to the surface of the valve seat 5 formed on the communication passage 4 communicating the valve 6 with the axis of the plunger 6 aligned with the center of the hole of the valve seat 5. A valve body 9 is attached to the tip of the core 8 of the electromagnetic solenoid 7 which also serves as a guide so that the valve body 9 can reciprocate with its outer periphery used as a guide. The valve body 9 is located between the valve seat 5 and the plunger 6. The valve opening and closing elastic member 10 is integrally attached to the valve body 9 in a state of being baked on the valve body 9, and is provided between the valve body 1 and the receiving portion 11 of the valve body 9.
A return spring 12 for urging the valve body 9 in the valve opening direction is attached. Between the electromagnetic solenoid 7 and the rear end face of the plunger 6, the plunger 6 is urged in a valve closing direction with a weaker urging force than the return spring 12. A holding spring 13 for attaching the plunger 6 tip surface to the valve opening / closing elastic member 10 lightly is attached.

As shown in FIG. 1, in the silencer type solenoid valve 14 configured as described above, the valve opening / closing elastic member 10 integral with the valve body 9 abuts on the end face of the plunger 6 by the urging force of the return spring 12. Electromagnetic solenoid 7 OFF
When the electromagnetic solenoid 7 is turned on in the valve open state of
As shown in FIG. 2, the return spring 12 of the plunger 6
The valve opening and closing elastic member 10 of the valve body 9 abuts on the valve seat 5 due to the suction movement against the urging force of the valve body 9 to close the valve. In this case, the end face of the plunger 6 is connected to the valve opening and closing elastic member 10. Since it is in contact with the end face of the plunger 6 and the end face of the core 8, the impact sound is prevented from being generated without interposing a spacer or the like for forming an air gap.
Can sufficiently secure the suction performance. Next, when the electromagnetic solenoid 7 is turned off in the valve closed state, the valve body 9 moves together with the plunger 6 in the valve opening direction by the urging force of the return spring 12, as shown in FIG. When the valve 10 is brought into contact with the end faces of the plunger 6 and the core 8 to open the valve, an impact sound is generated even if the valve opening / closing elastic member 10 collides with the end faces of the plunger 6 and the core 8. Never. As a result, in a state where the suction performance of the plunger 6 by the electromagnetic solenoid 7 of the silencing type electromagnetic valve 14 is sufficiently ensured, and the valve is turned ON / OFF.
The operating noise generated during the operation can be greatly reduced as shown in FIG. 4 with respect to the conventional waveform diagram shown in FIG.

Next, FIG. 4 shows a state in which the valve body 9 of the silencing solenoid valve 14 shown in FIGS. 1 and 2 is a resin valve body 15 having a U-shape in vertical section, and a valve opening / closing elastic member. A silencing solenoid valve 19 in which the valve body 16 is fitted into a hole 17 formed in the valve body 15 to receive the tip of the plunger 18 with a spherical surface, thereby increasing the degree of freedom of the valve body 15 and improving the sealing property of the valve. In other respects, the configuration, operation, and effects are almost the same as those of the above embodiment.

[Brief description of the drawings]

FIG. 1 is a cutaway side view showing a valve opening state of a silencing electromagnetic valve 14. FIG.

FIG. 2 is a cutaway side view showing a closed state of the silencing solenoid valve 14;

FIG. 3 is a waveform diagram of a sound generated when a conventional solenoid valve operates.

FIG. 4 is a waveform diagram of a sound generated when the silencing solenoid valve 14 operates.

FIG. 5 is a cutaway side view showing a valve opening state of the silencing solenoid valve 19;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve main body 2 Fluid inlet 3 Fluid outlet 4 Communication path 5 Valve seat 6 Plunger 7 Electromagnetic solenoid 8 Core 9 Valve body 10 Valve opening / closing elastic member 11 Receiving part 12 Return spring 13 Holding spring 14 Silent electromagnetic valve 15 Valve body 16 Elastic member for valve opening and closing 17 Hole 18 Plunger 19 Silence type solenoid valve

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16K 31/06 305

Claims (2)

(57) [Claims] 1. A valve seat formed on a communication passage connecting a fluid inlet and a fluid outlet of a valve body, and an electromagnetic solenoid attached to the valve body such that a plunger reciprocates in a direction perpendicular to a plane of the valve seat. A valve body mounted reciprocally with the outer periphery of the guide core of the plunger as a guide, and a valve integrally mounted with the valve body and positioned between the valve seat, the core, and the plunger. and opening and closing the elastic member, the valve body and the front
Bei a return spring for urging the valve body in the valve opening direction lies between the serial valve body, and a holding spring for urging the <br/> plunger valve closing direction by a weak urging force from the return spring
The elastic member for opening and closing the valve includes a biasing force of the holding spring.
With the tip surface of the plunger abutted by
Closes the valve by contacting the valve seat and contacts the core.
A silencing solenoid valve characterized by opening the valve in contact with it. 2. A valve opening and closing elastic member is burned to a valve body.
A contractor characterized by being attached together in a
The silencing solenoid valve according to claim 1.