JP2576420Y2 - 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 path of a pressure fluid.

[0002]

2. Description of the Related Art An electromagnetic valve is incorporated in a brake pressure control system in an antilock brake system for avoiding slippage during sudden braking and in a traction control system for avoiding idling of drive wheels. As shown in FIGS. 5 and 6, this solenoid valve has a valve portion c provided at the tip of a pin b integral with an armature a that moves in the axial direction, and a valve seat f provided at the bottom of an inner hole e of the body d. The valve mechanism is constituted by being seated on the sheet hole g (valve closed state). At this time, a guide member j having a guide hole h and a pressure fluid flow opening i as shown in FIG. 6 is used as a member for preventing the pin b from being misaligned. This guide member j is shown in FIG.
As shown in (1), the pin b is passed through the guide hole h in the vicinity of the valve hole h, is set in the body-inner hole e, and the position is fixed by inserting the presser ring k into the upper portion thereof and caulking. In addition, a filter 1 is used to filter the contaminants in the pressure fluid. As shown in FIG. 5, the filter 1 is mounted around the outside of the pressure fluid inflow passage m of the body d. I have.

[0003]

Problems to be Solved by the Invention The above-mentioned conventional solenoid valve device has the following problems. <B> The guide hole h of the guide member j is formed to be substantially equal to the diameter of the pin b, and has a function of preventing the pin b from being misaligned. However, the assembling work of the solenoid valve is complicated because the parts are small and may be set in a state where the pin b is inclined. Then, the guide member j also shifts due to the inclination of the pin b, and if the guide member j is fixed by caulking the press ring k in that state, the pin b is set in an inclined state. Therefore, the valve portion c is securely inserted into the sheet hole g.
It is difficult to sit on the upper edge of the vehicle.

<B> Since the centering of the pin b is performed by the two components of the guide member j and the holding ring k, the number of steps is increased and the assembling efficiency is reduced.

<C> The mounting of the filter 1 is performed by the guide member j.
In addition, since the operation is performed separately from the mounting of the holding ring k, the number of processes is increased, and the assembling efficiency is reduced.

<4> Since the presser ring k is fixed by caulking, complicated caulking work is required in the small-diameter body-inside hole e, and a caulking jig and equipment are required, which is uneconomical. .

<E> Since the filter 1 is mounted on the outer periphery of the body-inflow path m, the mounting area is large and the cost is increased.

[0008]

The purpose of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide the following solenoid valve. <A> Solenoid valve with a small number of parts and which can securely seat a pin in a seat hole of a valve seat.

<B> An electromagnetic valve capable of easily mounting a pin centering member in one step.

<C> An electromagnetic valve capable of simultaneously installing a pin centering member and mounting a filter, reducing the number of steps and improving assembly efficiency.

<D> An electromagnetic valve that can easily perform pin centering work without performing caulking work as in the prior art.

<E> An electromagnetic valve capable of reducing the filter mounting area and reducing the cost.

[0013]

According to the present invention, there is provided a core assembly having an armature accommodated in a sleeve, and a coil assembly armored to the core assembly, wherein the armature is movable in an axial direction. Consisting of a pin with an amateur,
An electromagnetic valve which constitutes a valve mechanism by seating a valve portion provided at a tip of the pin on a seat hole of a valve seat provided at a bottom of an inner hole of a body constituting a lower portion of the core assembly. The upper part of the sheet hole is formed with an annular tapered surface whose diameter increases toward the upper end surface, and a filter for purifying pressure fluid is installed in the inner hole of the body. Body
A cylindrical body pressed around the side surface of the inner hole and disposed around the pin, and a guide projection is provided on an inner peripheral surface of a lower part of the cylindrical body, and a tip of the guide projection limits a deflection amount of the pin in a radial direction. The solenoid valve is characterized in that the valve section is configured to join the tapered surface even if the valve section moves to the maximum in the radial direction.

[0014]

Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. <A> Overall Configuration FIG. 1 shows a solenoid valve set in a storage hole 11 in a housing 1. The solenoid valve includes a core assembly 2 in which an armature assembly 3 is accommodated in a sleeve 21;
The armature assembly 3 includes an armature 31 that can move in the axial direction and a pin 32 that is integral with the armature 31, and a valve portion 33 provided at the tip of the pin 32.
To the body-22 constituting the lower part of the core assembly 2.
The valve mechanism is constructed by seating in a seat hole 51 of the valve seat 5 provided at the bottom of the inner hole 23. A pressure chamber 24 is formed in the body-inner hole 23, and the pressure chamber 24 communicates with the inflow path 12 and the outflow path 13 of the pressure fluid. The present invention is characterized in that the misalignment of the pin 32 is prevented by using the filter 6 for purifying the pressure fluid and the valve seat 5 having the tapered surface 52 in the solenoid valve having the above structure. .

<B> Valve Seat The valve seat 5 is provided at the bottom of the inner hole 23 of the body 22 constituting the lower part of the core assembly 2, as shown in FIG.
The valve mechanism is constituted by seating the valve portion 33 of the pin 32 on the upper edge of the sheet hole 51 penetrated in the center. In the present invention, an annular tapered surface 52 is formed above the sheet hole 51 of the valve seat 5 so as to increase its diameter toward the upper end surface.

<C> External Shape of Filter The filter 6 is a cylindrical body having an outer diameter substantially equal to the diameter of the body-inner hole 23. For example, as shown in FIG. 2, a through hole 61 through which the pin 32 penetrates is provided in the shaft center portion, and the outer diameter is formed with a diameter difference from a large diameter portion 62, a small diameter portion 63, and a medium diameter portion 64 in order from the top. Use a cylindrical body. Then, a flow port 65 for the pressure fluid is opened in the small diameter portion 63, and a filter member 66 for purifying contaminants is stretched in the flow port 65. In the case where the outer diameter of the filter 6 has a diameter difference as described above, the diameter difference is also provided in the body-inner hole 23 as shown in FIG. That is, in order from the top of the body-inner hole 23, the large-diameter portion 2
5. The medium diameter portion 26 and the small diameter portion 27 are provided, and the medium diameter portion 26 and the filter large diameter portion 62, and the small diameter portion 27 and the filter medium diameter portion 64 are crimped to fix the filter 6 by crimping.

<D> Filter Guide Protrusion As shown in FIGS.
The guide projection 67 is provided in a projecting manner. The distal end of the guide projection 67 is formed with a predetermined gap provided when the pin 32 is located at the axis of the filter 6. For example, as shown in FIG.
Are projected to form a shape in which a predetermined gap L is secured between the tip and the pin 32. The space between the guide projections 67 is
The flow path 68 is a pressure fluid. In addition, the shape of the guide projection 67 may be a shape in which a flow path is opened in an annularly continuous shape. The gap L between the guide projection 67 and the pin 32 is determined by the amount of deviation between the central axis of the filter 6 and the central axis of the valve seat hole 51 due to manufacturing tolerances, the dimensional tolerance between the guide projection 67 and the pin 32, and the like. So that the valve portion 33 can be seated in the valve seat sheet hole 51. Further, the outer diameter of the taper surface 52 is set to such a size that the valve portion 33 can be joined to the taper surface 52 even if the pin 32 swings to the maximum until the pin 32 contacts the guide projection 67.

[0018]

[Assembling method] Next, an assembling method of the solenoid valve will be described. First, as shown in FIG. 4, the filter 6 is press-fitted and fixed until it contacts the bottom surface of the body-inner hole 23. At this time, if the filter 6 is made of a resin or the like and has elasticity, the filter 6 is pressed against the side surface of the body-inner hole 23 by the expansion force after press-fitting, and a reliable fixing and sealing structure can be obtained. Next, the armature assembly 3 is assembled, the pin 32 is passed between the guide projections 67, and the valve portion 33 at the tip is seated on the tapered surface 52 of the valve seat 5. Thereafter, a spring is incorporated as usual, the sleeve 21 integrated with the magnet core is set on the body 22, and the body 22 is caulked and fixed.
With such a configuration, even if the pin 32 moves in the radial direction, the movement is restricted by the guide projection 67, so that the contact with the taper surface 52 of the valve seat 5 can be maintained. The seat can be reliably seated.

[0019]

[Effects of the Invention] The present invention is as described above, and the following effects can be obtained. <A> The amount of deflection of the pin in the radial direction is limited by the tip of the guide projection, so that the valve portion does not come off the taper surface even if the valve portion moves to the maximum in the radial direction. Therefore, the valve portion can always be reliably seated in the seat hole.

<B> The structure is such that the conventional guide member and the three members of the holding ring and the filter are also used. Therefore, the cost of parts can be reduced and the number of processes is reduced,
The assembly efficiency can be improved.

<C> The filter can be fixed at a predetermined position only by press-fitting it into the body-inner hole. for that reason,
The conventional complicated staking operation is not required, and the efficiency of assembling the solenoid valve can be improved.

<D> Since the filter is housed in the pressure chamber, the mounting area can be reduced and the cost can be reduced as compared with a conventional filter provided around the outside of the pressure chamber.

[Brief description of the drawings]

FIG. 1 is a sectional view of the entire solenoid valve of the present invention.

FIG. 2 is an enlarged perspective view of a filter.

FIG. 3 is a sectional view of a lower portion of the filter.

FIG. 4 is an enlarged sectional view of a valve mechanism.

FIG. 5 is an explanatory view of a conventional technique.

FIG. 6 is an explanatory view of a conventional technique.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16K 31/06 305

Claims (1)

(57) [Scope of request for utility model registration] 1. An armature comprising a core assembly in which an armature is accommodated in a sleeve, and a coil assembly armored to the core assembly. The armature comprises an armature movable in an axial direction, and a pin integral with the armature. An electromagnetic valve that constitutes a valve mechanism by seating a valve portion provided at a tip of a pin in a seat hole of a valve seat provided at a bottom portion of an inner hole of a body constituting a lower portion of the core assembly. An annular taper surface is formed at an upper portion of the sheet hole so as to increase its diameter toward an upper end surface, and a filter for purifying a pressure fluid is installed in an inner hole of the body. A cylindrical body pressed around the side surface of the inner hole and arranged around the pin, wherein a guide projection is provided on the inner peripheral surface of the lower part of the cylindrical body, and the amount of radial deflection of the pin at the tip of the guide projection is reduced; A solenoid valve, wherein the valve unit is configured to join the taper surface even when the valve unit moves to the maximum in the radial direction.