JP3069742B2 - Solenoid valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a solenoid valve device provided for an antilock brake system.

<Prior Art> In an anti-lock brake system capable of effectively preventing tire slip and braking effectively, a plurality of solenoid valves for reducing, increasing, and holding the brake pressure sent to each wheel cylinder are incorporated. ing.

FIG. 5 shows an example of a conventional solenoid valve device incorporating a plurality of solenoid valves.

The conventional solenoid valve device comprises a housing a and a rod-shaped arm assembly c slidably housed in a sleeve b.
A magnet core d that positions the sleeve b to form a liquid chamber between the housing a and the sleeve b, and a donut-shaped coil assembly e that covers the sleeve b and slides the armature assembly c with electromagnetic force. It is configured.

The assembly is performed by inserting the lower portion of the magnet core d into the housing hole f of the housing a, and inserting the armature c into the through hole formed in the magnet core d.
Is inserted, the sleeve b is covered with the magnet core d, the periphery of the accommodation hole f is crimped to fix the bottom of the sleeve b, the coil assembly e is covered with the sleeve b, and the washer h is crimped on the sleeve b. Unitized.

<Problems to be Solved by the Present Invention> The above-described conventional solenoid valve device has the following problems.

<A> As shown in FIG. 6 in an enlarged manner, the bottom of the sleeve b is fixed by a surplus portion i which is formed by caulking the periphery of the housing hole f indicated by a chain line.

However, it is difficult to evenly crimp the peripheral portion of the accommodation hole f.

If the caulking fails, the liquid easily leaks from the sealing surfaces formed on both sides of the bottom of the sleeve b.

In addition, if the swaging is not uniform, the axis of the sleeve b shown in FIG. 5 is inclined with respect to the center line of the receiving hole f, so that it becomes difficult to smoothly slide the armature assembly c, and also, the armature arm is not slid. This causes a problem that the valve mechanism constituted by the valve ball j and the valve seat k at the tip of c does not function properly.

<B> If the swaging of the sleeve b fails, it is practically impossible to remove the sleeve b and swage again.

For this reason, if any one of the units fails to be swaged, all the units become defective and are discarded, which is uneconomical.

<C> Even if a defect such as a defect occurs in a part of the core assembly component, it cannot be replaced.
The same problem as described above occurs.

<Object of the present invention> The present invention has been made in order to solve the above problems, and an object of the present invention is to allow a core assembly constituting an electromagnetic valve to be attached and detached. An object of the present invention is to provide a solenoid valve device that can be easily and accurately assembled.

<Means for Solving the Problems> That is, according to the present invention, a housing having a plurality of valve housing holes, a core assembly containing an armature slidably accommodated in a sleeve, and an armored outer member are provided. In a solenoid valve device provided with a donut-shaped coil assembly that slides an armature assembly by force, a female screw is provided on a part of an inner peripheral surface of the accommodation hole, and a step surface is provided on a skirt portion of the core assembly. The step surface of the core assembly is fastened and fixed by the end surface of the ring nut detachably screwed into the accommodation hole.

Further, the present invention is characterized in that, in the solenoid valve device, an annular groove is formed in the inner peripheral surface of the accommodation hole, and a clip having a width protruding from the annular groove restrains the upper surface of the skirt of the core assembly.

<Description of the Present Invention> Hereinafter, the present invention will be described with reference to the drawings.

<A> Overall Configuration of Solenoid Valve Device FIG. 1 shows the mounting structure of the solenoid valve on the inlet side.

The solenoid valve device includes a housing 10, a plurality of core assemblies 20, and the same number of coil assemblies 30 as the core assemblies 20.

<B> Housing The housing 10 has the same number of receiving holes 11 as the number of core assemblies 20 to be fixed.

Each accommodation hole 11 is formed with a different diameter of the small diameter part 11a and the large diameter part 11b in order from the back, and an internal thread is engraved on the inner periphery of the large diameter part 11b opened at the position closest to the surface of the housing 10. .

A liquid chamber 13 is formed in communication with the interior of the accommodation hole 11, and a valve seat 14 is provided in the interior of the liquid chamber 13.

A communication path 15 communicates with an outlet liquid chamber (not shown), and a liquid supply port 16 is connected to a liquid supply pump.

<C> Core Assembly The core assembly 20 is a sleeve 21, an armature 22 accommodated in the sleeve 21, a plunger 23 fixed to the armature 22, and a magnet core for inserting the plunger 23.
24, and a spring 25 contracted in the magnet core 24.

An amateur assembly is constituted by the amateur 22 and the plunger 23.

A valve ball 26 is provided at the tip of the plunger 23, and the valve seat 14 constitutes a valve mechanism.

The spring 25 normally urges the amateur assembly in the valve opening direction.

The magnet core 24 is a small diameter portion 24a that fits into the sleeve 21.
And a middle diameter portion 24b larger in diameter than the small diameter portion 24a and a large diameter portion 24c larger in diameter than the middle diameter portion 24b.

The large diameter portion 24c is formed to have a diameter substantially equal to the large diameter portion 11a of the accommodation hole 11.

If the above-described core assembly 20 is manufactured in advance as one unit, the assembling work of the solenoid valve device described later is simplified.

<D> Coil assembly The coil assembly 30 is a member in which the coil 32 wound in a cylindrical shape inside the cover 31 is integrally formed as in the conventional case, and each end of the coil 32 is guided outside the cover 31. .

The coil assembly 30 is fixed to the sleeve 21 of the core assembly 20 via the washer 33.

<E> Fixing Means of Core Assembly In this embodiment, the ring assembly 40 is used to fix the core assembly 20 to the housing 10.

The ring nut 40 has a ring shape as shown in FIG. 2, a screw 41 is engraved on the outer peripheral surface, and a rotation groove 42 or a hole is opened at a symmetrical position at the end thereof. Forward and reverse rotation is applied using a tool that fits into the rotation groove 42 or hole.

It is important that the outer diameter of the ring nut 40 is equal to the large diameter portion 11b of the housing hole 11 as shown in FIG. 1, and that the inner diameter is smaller than the outer diameter of the large diameter portion 24c of the magnet core 24. is there.

<F> Assembling method The assembling method of the solenoid valve device will be described. First, the magnet core 24 is inserted into the accommodation hole 11, and then the ring nut is inserted.
The core assembly 20 is fixed to the housing 10 by screwing the 40 into the large diameter portion 11b of the accommodation hole 11.

Since the ring nut 40 evenly presses the step surface formed between the middle diameter portion 24b and the large diameter portion 24c of the magnet core 24, the inclination can be prevented and the core assembly 20 can be fixed with high accuracy.

If the ring nut 40 is expected to be loosened, the ring nut 40 is caulked after the function check test.

When the fixing work of the core assembly 20 is completed, the coil assembly is attached to the core assembly 20 using the washer 33.
Fix 30.

The method of fixing the coil assembly 30 is the same as that of the related art, and thus the description is omitted.

When the core assembly 20 is detached, the above procedure may be reversed.

<Other Embodiment 1> FIG. 3 shows an embodiment in which a screw 27 is engraved on the peripheral surface of the magnet core 24 and is engraved on the inner periphery of the housing hole 11 on the housing 10 side and directly screwed to the screw. Show.

In this embodiment, the ring nut 40 of the above embodiment can be omitted.

<Other Embodiment 2> FIG. 4 shows a core assembly using a spring clip 50.
An embodiment in which 20 is fixed is shown.

The spring clip 50 has a rectangular or circular spring member C
A known clip which is bent in a letter shape and has openings at both ends for tool locking can be used.

In the case of this embodiment, an annular groove 17 having a cross-sectional width of the spring clip 50 needs to be recessed at a predetermined position on the inner peripheral surface of the housing hole 11.

<Other Embodiment 3> The structure of fixing the solenoid valve for the inlet has been described above, but it is needless to say that the structure can be applied to the mounting of the solenoid valve for the outlet.

<Effects of the Present Invention> The present invention is as described above, and the following effects can be obtained.

<B> The core assembly can be removed, and the attachment / detachment operation can be easily performed.

<B> Since a uniform tightening force can be applied to the hem of the core assembly, the core assembly can be prevented from tilting.

Smooth sliding of the amateur assembly can be ensured, and the function of the valve mechanism is not damaged.

<C> The failure in mounting the core assembly is eliminated, the disposal of the solenoid valve is avoided, and the manufacturing cost of the solenoid valve device can be reduced.

[Brief description of the drawings]

Fig. 1: Longitudinal sectional view of the solenoid valve device according to the present invention Fig. 2: Perspective view of the ring nut Fig. 3: Longitudinal sectional view of the solenoid valve device showing another fixing structure of the core assembly Fig. 4: Spring clip FIG. 5: Longitudinal sectional view of the entire solenoid valve device on which the present invention is based. FIG. 6: Enlargement of the swaging portion shown in FIG. Sectional view

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16K 27/00-31/11

Claims (2)

(57) [Claims] 1. A housing having a plurality of valve receiving holes, a core assembly containing an armature slidably accommodated in a sleeve, and a door externally mounted on the core assembly for sliding the armature by electromagnetic force. An electromagnetic valve device including a nut-shaped coil assembly, wherein an internal thread is provided on a part of the inner peripheral surface of the accommodation hole, a step surface is provided on a skirt portion of the core assembly, and is detachably screwed into the accommodation hole. An electromagnetic valve device, wherein a step surface of a core assembly is fastened and fixed by an end surface of a ring nut. 2. A housing having a plurality of valve housing holes, a core assembly having an armature slidably accommodated in a sleeve, and a door externally mounted on the core assembly for sliding the armature assembly by electromagnetic force. An electromagnetic valve device having a nut-shaped coil assembly, wherein an annular groove is recessed in an inner peripheral surface of the accommodation hole, and a clip having a width protruding from the annular groove restrains a top surface of a skirt portion of the core assembly. Characteristic, solenoid valve device.