JPH0219576Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an intake device for an electromagnetic solenoid valve.

Generally, in this type of electromagnetic solenoid valve, there is a port that supplies air from the atmosphere as a means of controlling the negative pressure inside the engine with an electromagnetic solenoid, and this air port must be supplied with air that has been filtered. Depending on the mounting direction of the electromagnetic solenoid valve, there is a risk that water and dust may enter the valve, which may interfere with its function as an electromagnetic solenoid valve.

This invention is intended to provide an excellent electromagnetic solenoid valve intake device that eliminates the drawbacks of the conventional devices as described above, and one embodiment of this invention will be described below with reference to the drawings. In Figures 1 to 4, 1 is an electromagnetic solenoid valve, 1a is a negative pressure suction port, 1b is an actuator ventilation port, and 1c
is an air intake port, 2 is a ventilation device, 2a is a rubber cap of the ventilation device 2, 2b is a cover that protects the filter 3, 2c is an internal air passage that introduces air from the atmosphere, and is provided at several locations at the tip of the protective cover 2b. It is being 2d is an external air passage provided in several places in the protective cover 2b, similar to the internal air passage 2c, and 2e is an air intake port 1 of a solenoid valve that filters air from the atmosphere with an introduction filter 3.
2f is a water/dust intrusion prevention wall provided on the protective cover 2b of the filter 3; 2g is an air vent introduced into c;
2h is the inner wall of the rubber cap 2a inserted into the suction port 1c, 2h is a bearing into which the filter 3 is inserted, 2j is a water/dust prevention wall provided on the bearing 2h, and 2k is a wall that prevents dust, water, etc. from entering from the atmosphere. The blocking cover 21 is the outer cylinder of the cover 2k. Note that FIG. 2 is an exploded view of the rubber cap 2a constituting the ventilation system 2, and FIGS. 3 and 4 are views showing its usage mode.

Next, the operation of the apparatus configured as described above will be explained. In a solenoid valve that turns ON and OFF in response to an electric signal, for example, when negative pressure is sensed, air flows from port 1b to port 1a as shown by arrow A in Figure 1. A plunger (not shown) included in the solenoid valve 1 is turned from ON to OFF, cutting off the air that has been flowing and instead changing the flow from port 1c to port 1b as shown by arrow B in Figure 1. At this time, water and dust from the atmosphere will enter from port 1c, so the ventilation system 2 should be connected to port 1c.
Attached to c to purify the air in the atmosphere.

By the way, the mounting direction of the solenoid valve 1 varies depending on each engine. For example, as shown in FIG. ) and vice versa as shown in FIG. Conventional ventilation systems have good dustproof and waterproof properties when installed in one direction, but when installed in the other direction, dust and water can enter.

Here, in the present invention, the rubber elasticity of the rubber cap 2a provided in the ventilation device 2 is effectively used, and at the same time, the air passage is made into a labyrinth to prevent dust and water from entering no matter which direction the electromagnetic solenoid valve 1 is installed. It is designed to be flexible and allow for ventilation.

First, when the ventilation system 2 is installed in the top and bottom directions as shown in Fig. 3, the rubber cap 2a is molded from a rubber material into the shape shown in Fig. 2, and the filter 3 is inserted into the bearing 2h of the rubber cap. When the protective cover 2b is reversed, it protects the outer periphery of the filter 3, and at the same time creates a gap between the water and dust prevention wall 2j provided on the bearing 2h of the rubber cap and the water and dust intrusion prevention wall 2f provided on the protective cover 2b. A passage for preventing water and dust is formed. Next, by inverting the outer cylinder 2i provided on the cover 2k, the outer cylinder 2i covers the end of the protective cover 2b from above, and the filter 3 is completely protected, so that even if water or dust gets in, the filter 3 will be completely protected. This is blocked by dust blocking walls 2f and 2j. Ventilation takes place through the air passage 2d.

Figure 4 shows a case where the top direction is opposite to that in Figure 3, and as above, insert the filter 3 into the bearing 2h of the rubber cap, and first insert the filter 3 into the bearing 2h of the rubber cap.
The filter 3 is protected by inverting the outer cylinder 2i provided in preparation for the accident and then inverting the protective cover 2b of the filter 3, and in addition, water and dust blocking walls 2f and 2j are formed inside, so that in the event of an emergency, the filter 3 is protected. Even if water and dust enter, it can be prevented by the water and dust prevention walls 2f and 2j. Ventilation is performed through the air passage 2c.

Therefore, no matter which direction the ventilation device 2 is installed, by changing the degree of overlap between the overlapping end of the protective cover 2b and the outer cylinder 2i, water and
The intrusion of dust is prevented as much as possible, and in case of an intrusion, walls 2f and 2j are provided inside to prevent the intrusion of water and dust.

As described above, according to this invention, an overlapping part is provided in the rubber cap itself of the filter, a ventilation passage is provided in this overlapping part, and a wall for preventing water and dust is provided inside the rubber cap, and these are integrally formed. Therefore, it is possible to reduce the number of parts and provide an inexpensive electromagnetic solenoid valve intake device that is easy to assemble.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an embodiment of this invention.
FIG. 2 is a side sectional view showing the rubber cap used in this invention in its unfolded state, and FIGS. 3 and 4 are side sectional views showing how the rubber cap is used. In the figure, 1c is an air intake port, 2 is a ventilation device,
2a is a rubber cap, 2b is a protective cover, 2
c, 2d are air passages, 2e are vents, 2f, 2j
2h is a bearing, 2k is a cover, 21 is an outer cylinder, and 3 is a filter.

Claims (1)

[Scope of utility model registration request] Vent port 2 communicating with the opening fitted into the intake port
A hollow bearing 2h that fixes the filter 3 around e.
and a protective cover 2b made of an elastic member having one end connected integrally with the above-mentioned 2h and covering the outer periphery of the filter 3, and one end connected integrally with the above-mentioned bearing 2h,
An outer cylinder 21 made of an elastic member overlapped with the outer periphery or inner periphery of the opening end of the protective cover 2b so that the other end covers the opening end of the protective cover 2b, and air intake passages 2c, 2d formed in the overlapping part. and walls 2f and 2j provided on the bearing 2h and the protective cover 2b.