JPH022122Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a solenoid valve used in an air suspension of an automobile.

As shown in FIG. 1, a conventional solenoid valve includes a solenoid 2 inside a casing 1, and a core 3 for the solenoid 2 has a core 3 at its tip.
The magnetic plunger 4 is arranged so as to move the one end 4a of the magnetic plunger 4 toward and away from the magnetic plunger 4 with minute strokes.

The other end of the magnetic plunger 4 is formed as a valve body, and when the solenoid 2 is suctioned, the valve body including this valve body is connected to an air supply port 5 and an air discharge port 6.
It is designed to communicate with

In FIG. 1, reference numeral 7 indicates a return spring, 8 a body side panel, 9 a mounting portion, and 10 a mounting bolt.

However, such a conventional solenoid valve has a problem in that an impact sound (solenoid valve tapping sound) is generated when the magnetic plunger 4 comes into contact with the solenoid core 3.

That is, when the magnetic plunger 4 is turned on and off at the reference frequency (1000 Hz) as shown in FIGS. 5a and 7a, the solenoid valve acceleration [see FIG. a] and vehicle interior sound [see Figure 7 b]
occurs.

SUMMARY OF THE INVENTION The present invention aims to solve these problems, and it is an object of the present invention to provide a noise-muffling solenoid valve that can reduce impact noise in a solenoid valve.

For this reason, the noise-reducing solenoid valve of the present invention includes a solenoid core provided in a casing, a magnetic plunger disposed at the tip of the core so as to move one end toward and away from the core with a minute stroke, and the plunger and other components. a valve body that is provided at the end and opens and closes in accordance with the movement of the plunger; a noise-muffling elastic member that is interposed between the solenoid core and the magnetic plunger; and a mounting member that is fixed to the casing; A hole provided in the vicinity of the end of the mounting member, a notch provided from the end of the mounting member to the hole, and an elastic member formed into a columnar shape and extending around the outer periphery of the axially intermediate portion. A mount rubber that fits into the hole with its surface and has an outer diameter at both ends in the axial direction excluding the middle part that is larger than the outer diameter of the middle part and the inner diameter of the hole, and the same mount in the axial direction of the mount rubber. A through hole provided through the rubber, and a mounting bolt that is inserted into the through hole and screwed to the vehicle body side member to fix the mounting member to the vehicle body side member via the mount rubber. It is characterized by being configured.

Below, examples will be explained with reference to the drawings.
Figures 2 to 7 show a noise-reducing solenoid valve as an embodiment of the present invention. Figure 2 is a side view corresponding to Figure 1, Figure 3 is a side view, and Figure 4 is a side view of the valve. The sectional view taken along the - arrow line in Fig. 3, Figs. It is.

As shown in Figs. 2 to 4, a solenoid 2 is provided in each casing 1 of the two-barrel valve. Magnetic plungers 4 and 4' are arranged so as to move the one end portion 4a toward and away from each other with minute strokes.

The other end 4b of the magnetic plungers 4, 4' is formed as a valve body 4c, and when the solenoid 2 is suctioned, the valve part 11 including the valve body 4c has an air supply port 5, an air discharge port 6, 6'.

Further, at one end 4a of the plungers 4, 4',
A cushion rubber 12 is interposed as a sound-deadening elastic member, so that the plungers 4, 4' and the solenoid cores 3, 3' do not come into direct contact with each other.

Further, the mounting member 9 of the casing 1 is provided with a hole 9a near its end, and a notch 9 extending from the end of the mounting member 9 to the hole 9a.
b is formed.

A mount rubber 13 made of an elastic member and shaped into a columnar shape is attached to the mounting member 9 by being fitted into the hole 9a at the outer circumferential surface of the axially intermediate portion thereof. This mount rubber 13 is formed in such a shape that the outer diameter of both ends in the axial direction excluding the axially intermediate portion is larger than the outer diameter of the intermediate portion and the inner diameter of the hole 9a, and A through hole 13a is provided, and a distance piece 14 and a mounting bolt 10 are inserted into the through hole 13a.

By screwing the mounting bolt 10 into the vehicle body side panel 8, the mounting member 9 is attached to the vehicle body side panel 8 via the mount rubber 13.

By the way, the two-port valve A of the two-port valve is provided with a passage 3a for venting to the atmosphere, and when the plunger 4' is positioned downward as shown in FIG. 16 is in an open state, and the passage 3a and the air discharge ports 6, 6' communicate with each other. As a result, atmospheric air is supplied to the air exhaust ports 6, 6' via the silencer 15.

At this time, the valve portion 11 is in a closed state.

Further, the one-port valve B, which is a double valve, controls communication between the air supply port 5 and the air discharge ports 6, 6'.

With the above-described configuration, when a control signal is supplied to the solenoid 2, the plungers 4, 4' move upward in FIG.
6', for example, by supplying compressed air from the reserve tank to the air cylinder,
The air cylinder of the air suspension can be driven, and at this time the valve part 16 is closed.

In addition, the solenoid 2 is normally located so that the plungers 4 and 4' are located at the lower part in FIG. is not supplied and the air exhaust ports 6, 6' communicate with the passage 3a, so the air cylinder is opened to the atmosphere.

When the solenoids 2 of the valves A and B are activated, the solenoid cores 3 and 3' and the magnetic plungers 4 and 4' come into elastic contact with each other due to the cushion rubber 12, so that an impact sound (solenoid valve hitting sound) is generated. is reduced compared to the conventional one.

That is, when the magnetic plunger 4 is turned on and off at the reference frequency (1000 Hz) as shown in FIGS. 5a and 7a, the solenoid valve acceleration [see FIG. b] and vehicle interior sound [see Fig. 7c]
is reduced compared to the conventional one.

Further, the cushion rubber 12 may be attached to the solenoid cores 3, 3'.

Furthermore, since the casing 1 is attached to the vehicle body side panel 8 via the mount rubber 13, the sound and vibrations generated by the operation of the solenoid valve are absorbed by the mount rubber 13, and the above-mentioned sounds and vibrations are absorbed by the mount rubber 13. It is possible to prevent vibrations from propagating to the vehicle body side panel 8.

The mounting member 9 also has a hole 9 from its end.
Since the notch 9b is formed extending up to a, the mounting rubber 13 can be attached to the hole 9a formed in the mounting member 9 by press-fitting the middle part of the mount rubber 13 into the notch 9b. be able to.

As described above in detail, according to the noise-muffling solenoid valve of the present invention, the following effects and advantages can be obtained.

(1) Impact noise when the solenoid is activated is significantly reduced.

(2) Extremely large noise reduction effect can be achieved with a compact configuration.

(3) Since the casing is attached to the vehicle body side members through the mount rubber, the sound and vibrations generated by the operation of the solenoid valve are absorbed by the mount rubber, and the above noise and vibrations are prevented from propagating to the vehicle body side members. can be prevented.

(4) Since a notch is provided extending from the end of the mounting member to the hole, the mount rubber can be easily attached to the hole by press-fitting the middle part of the mount rubber into the notch. can be done.

[Brief explanation of drawings]

Fig. 1 is a cutaway side view showing the main parts of a conventional solenoid valve, and Figs. 2 to 7 show a silencer solenoid valve as an embodiment of the present invention. A side view corresponding to the figure,
Fig. 3 is a side view, Fig. 4 is a sectional view taken along the - arrow line in Fig. 3, Fig. 5 a to c, Fig. 6 a,
7b and FIGS. 7a to 7c are graphs showing the effect of the present invention in comparison with the conventional one. 1...Casing, 2...Solenoid, 3,
3'... Solenoid core, 3a... Passage, 4,
4'...Magnetic plunger, 4a...One end, 4b
...Other end, 4c...Valve body, 5...Air supply port,
6, 6'... Air discharge port, 7... Return spring, 8... Body side panel, 9... Mounting member, 9a... Hole, 9b... Notch, 10... Mounting bolt, 11... Valve part, 12...Cushion rubber as a sound-deadening elastic member, 13...Mount rubber, 13a...Through hole, 14...Distance piece, 15...Silencer, 16...Valve part,
A...2 port valve, B...1 port valve.

Claims (1)

[Scope of utility model registration request] A solenoid core provided in the casing, a magnetic plunger provided at the tip of the core to move one end toward and away from the other end with a minute stroke, and a magnetic plunger provided at the other end of the plunger to move the magnetic plunger as the plunger moves. A valve body that opens and closes, a sound-deadening elastic member interposed between the solenoid core and the magnetic plunger, a mounting member fixed to the casing, and a hole provided near the end of the mounting member. a notch provided from the end of the mounting member to the hole, and an elastic member formed into a column shape and fitted into the hole on the outer circumferential surface of the intermediate portion in the axial direction; a mount rubber having an outer diameter at both ends in the axial direction excluding the outer diameter larger than the outer diameter of the middle part and the inner diameter of the hole, and a through hole provided through the mount rubber in the axial direction of the mount rubber; and a mounting bolt that is inserted into the through hole and screwed into the vehicle body side member to fix the mounting member to the vehicle body side member via the mount rubber. valve.