JPH072015Y2 - filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a filter made of synthetic resin, which is disposed in, for example, an inlet-side passage of a solenoid valve.

(Prior Art) Conventionally, as shown in FIG. 5, for example, a first stage provided in an inlet 2 of a solenoid valve 1 incorporated in an antilock brake system for controlling hydraulic pressure acting on a wheel cylinder. An annular flange 4 that engages with the portion 3 and a second step portion 5 that is provided at a substantially parallel interval with the flange 4 and that is provided midway on the downstream side of the inflow passage 2 of the solenoid valve 1 so as to face each other. Disk-shaped end plates 6 arranged in parallel, a pair of connecting rods 7 that connect the end plate 6 and the flange 4 and are arranged at equal intervals in the circumferential direction, and the connection. A fluid passage opening 8 defined by the rod 7, the flange 4, and the end plate 6.
A synthetic resin filter 10 including a net 9 stretched over the
Is known.

(Problems to be Solved by the Invention) In such a conventional filter 10, when the connecting rod 7 is broken, the end plate 6 moves to the second position as shown in FIGS. 6 and 7.
There is a problem that the function is deteriorated because it abuts on the step portion 5 and closes the passage 11 at the center thereof.

Although it is conceivable that an opening is provided in the end plate 6 and a net is stretched over this opening, the outer diameter of the end plate 6 is small, and an opening is provided in this end to stretch the net. However, since the passage cross-sectional area is small, it is difficult to obtain a sufficient passage cross-sectional area by itself.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a filter whose function is not deteriorated without blocking the passage in the center of the second step even if the connecting rod is broken. Has an aim.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a flange that engages with a first step portion provided at an inlet, and an inlet that is substantially parallel to the flange. An end plate disposed so as to face and be spaced apart from a second step portion provided on the downstream side inflow passage, and the end plate and the flange are connected to each other and arranged at a predetermined interval in the circumferential direction. A plurality of connecting rods, and a net made of synthetic resin, which is stretched in the fluid passage opening defined by the connecting rod, the flange, and the end plate, On the surface facing the second step portion, the second
It is characterized in that a projecting portion which can come into contact with the stepped portion is provided.

(Operation) When the connecting portion should be broken, the protrusion comes into contact with the second step portion,
Since the end plate does not come into contact with the second step portion, the central passage of the second step portion is not blocked and the function is not deteriorated.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. It should be noted that, in the present invention, the above described FIGS.
The same components as those in the related art shown in the drawings will be described with the same reference numerals in the drawings. FIG. 1 is a side view in which a main part of a solenoid valve having a filter of the present invention is broken away, FIG. 2 is a perspective view of the filter of the present invention, FIG.
The drawing is a sectional view taken along line IV-IV in FIG. The novel point of the filter 10 'of the present invention, which is different from the conventional one, is that the end plate 6 faces the second step portion 5 as shown in FIGS.
A pair of rod-shaped projections 12 that can come into contact with the second step portion 5 are integrally provided by extending the upper ends of the connecting rods 7.

In FIG. 5, 13 is an outlet provided opposite to the inlet 2 of the solenoid valve 1, and 14 is a flow inlet with a filter provided immediately downstream of the filter 10 '. The inlet 2 is connected to an accumulator (not shown) via a first communication passage 16 of the modulator body 15. Also, the outlet
Reference numeral 13 is connected to a reserve tank (not shown). Further, the flow port 14 is connected to the antilock control hydraulic chamber of the modulator via the second communication passage 17 of the modulator body 15.

The modulator controls the pressure in the wheel cylinder of a hydraulic anti-lock brake device (not shown) so that the slip ratio of the wheel becomes a predetermined range value (for example, 0.1 to 0.3).

In such a structure, the protrusion 12 of the filter 10 'of the present invention is normally separated from the second step portion 5 of the solenoid valve 1 as shown in FIG. In this state, the fluid that has flowed in from the inflow port 2 passes through the mesh body 9 and flows into the central passage 11 of the second step portion 5 from the opening 8.

On the other hand, if the connecting rod 7 breaks, the projection 12 comes into contact with the second step 5 as shown in FIG.
The end plate 6 does not come into contact with the end plate 6, the central passage 11 of the second step portion 5 is not blocked by the end plate 6, and the function does not deteriorate.

(Effects of the Invention) According to the present invention as described above, when the connecting portion should be broken, the protrusion contacts the second step and the end plate does not contact the second step. The central passage of the two-step portion is not blocked, and the function is not deteriorated.

[Brief description of drawings]

FIG. 1 is a side view in which a main part of a solenoid valve having a filter according to the present invention is cut away, and FIG. 2 is a perspective view of the filter according to the present invention.
FIG. 3 is an explanatory view of the operation of the filter, and FIG. 4 is an IV of FIG.
Fig. 5 is a sectional view taken along line -IV, Fig. 5 is the same view as Fig. 1 equipped with a conventional filter, Fig. 6 is an explanatory view of the operation of the filter, and Fig. 7 is line VII-VII in Fig. 6. FIG. DESCRIPTION OF SYMBOLS 1 ... Electromagnetic valve, 2 ... Inlet, 3 ... 1st step part, 4 ... Flange, 5 ... 2nd step part, 5 ... End plate, 7 ... Connection rod, 8 ... Opening part, 9 ... Net body, 10 ' … Filters, 12… Projections.

Claims (1)

[Scope of utility model registration request] 1. A flange engaging with a first step portion provided at an inflow port, and a second step portion provided at an interval substantially parallel to the flange and in the middle of an inflow passage downstream from the inflow port. And a plurality of connecting rods that are arranged to face each other and are spaced apart from each other at predetermined intervals in the circumferential direction while connecting the end plate and the flange, and the connecting rod and the flange. A filter made of a synthetic resin, comprising a mesh body stretched in a fluid passage opening defined by the end plate, the second step being provided on a surface of the end plate facing the second step part. A filter characterized in that a protrusion is provided so as to be able to come into contact with the portion.