JPH1038126A - Electromagnetic valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic valve which does not require any special joining process such as welding or any special fixing member such as wave washer for fixing a movable element holding sleeve. SOLUTION: The movable element holding sleeve 10 which guides a movable element 11 in the axial direction has an approximately cup shape, and is, on the opening end side, integrally provided with an elastically deformable part 10c which has an approximately S formed irregular shape and is elastically deformable in the axial direction. The elastically deformable part 10c is pressed to a plate 6 side by the tip part 7a' of a yoke 7, and the tip thereof is pressed to the tip part 6a' of the plate 6 to be elastically deformed so that the movable element holding sleeve 10 is fixed to an electromagnetic valve 1. Thus, the elastically deformable part 10c which is integrally provided on the movable element holding sleeve 10 acts like a usual wave washer, and the movable element holding sleeve 10 is fixed to the electromagnetic valve 1 so that an easy assembling of the electromagnetic valve 1 is assured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a solenoid valve for electrically opening and closing a valve.

[0002]

2. Description of the Related Art A solenoid valve has a mover for driving a valve element. This mover is assembled to the solenoid valve while being contained in the mover holding sleeve. This mover holding sleeve is provided integrally with a cylindrical portion that covers and slides around the mover and a regulating portion that regulates a moving range of the mover on the side opposite to the valve body, and is fixed inside the coil. .

As a technique for fixing the mover holding sleeve, there is a fixing technique in which a valve element side end of the mover holding sleeve is provided in a flange shape, and the flange portion is welded to an end of a yoke constituting a magnetic circuit. Known and
A fixing technology that interposes a wave washer between the end of the plate that forms the magnetic circuit and the flange, presses the flange against the plate at the end of the yoke, elastically deforms the wave washer, and fixes the mover holding sleeve. It has been known.

[0004]

The technique of fixing the armature holding sleeve to the yoke by welding requires a welding step in the manufacturing process of the solenoid valve, so that the number of steps is increased and a welding machine is used. Increase in equipment costs
A problem arises in that the cost of the solenoid valve increases. In addition, the technique of fixing the mover holding sleeve by separately using a fixing member such as a wave washer causes a problem that the cost of the solenoid valve increases due to an increase in the number of parts.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to fix an electromagnetic valve which does not require a special joining step or a special fixing member to fix a mover holding sleeve. In the offer.

[0006]

According to the first aspect of the present invention, the elastically deformable portion integrally provided at the end of the movable member holding sleeve acts like a conventional wave washer, thereby holding the movable member. The sleeve is fixed to the solenoid valve. That is, the mover holding sleeve is fixed to the solenoid valve without using a joining process such as welding or using a special fixing member such as a wave washer. As described above, the reduction in the number of steps or the number of parts makes it easy to assemble the solenoid valve and can reduce the manufacturing cost of the solenoid valve.

According to the second aspect of the present invention, the elastic deformation portion is formed as an uneven portion, and the tip is held in contact with the plate or the coil bobbin, so that a dimensional error in the axial direction can be absorbed. Further, by contacting the tip of the elastic deformation portion with the plate or the coil bobbin, the mover holding sleeve can be formed without changing the magnetic circuit.

[0008]

Next, embodiments of the present invention will be described based on examples and modifications. FIG. 1 is a sectional view of a solenoid valve to which the present invention is applied. The solenoid valve shown in this embodiment is for a normally open type oil passage switching in which the valve body moves to an open position by hydraulic pressure when no power is supplied.

The solenoid valve 1 has a coil 2 that generates a magnetic force when energized. The coil 2 is wound around a coil bobbin 3 a formed by a resin base 3, and an end of the coil 2 is connected to a terminal 4 fixed to the base 3. A resin connector 5 for connecting the terminal 4 is provided around the terminal 4. Further, the base 3 has an import 3b for receiving a supply of hydraulic pressure, a valve seat 3c provided coaxially with the import 3b, and an outflow port 3d provided in a direction perpendicular to the import 3b and the valve seat 3c. Is provided.

The solenoid valve 1 includes a magnetic metal plate 6 and a yoke 7 which form a part of a magnetic circuit by the magnetic force generated by the coil 2. The plate 6 is molded and fixed in the base 3, and a cylindrical valve body sleeve 8 is press-fitted inside a plate inner peripheral portion 6 a arranged inside the coil 2.

The valve body sleeve 8 supports the valve body 9 inside the sleeve so as to be slidable in the axial direction.
The valve sleeve 8 is also made of magnetic metal, and the plate 6
To form a part of a magnetic circuit. The valve element 9 is made of a nonmagnetic metal such as stainless steel, and is disposed coaxially with the valve seat 3c by the valve element sleeve 8. The valve body 9 has a substantially rod shape, and both ends thereof are provided in a substantially spherical shape, and one end thereof is provided so as to be in contact with the valve seat 3c so as to close the valve seat 3c.

The yoke 7 is attached from the rear (right side in the figure) of the coil bobbin 3a, and includes a yoke inner peripheral portion 7a inserted inside the coil bobbin 3a, and a coil bobbin 3a.
and an outer peripheral portion 7b that covers the outside of the outer peripheral portion 7a. The front end (the left end in the figure) of the outer peripheral portion 7b is caulked inward and fixed.

A mover holding sleeve 10 having a substantially cup shape formed by pressing a thin plate made of a nonmagnetic metal such as stainless steel is assembled inside the yoke inner peripheral portion 7a. The mover holding sleeve 10 axially guides a substantially cylindrical mover 11 disposed coaxially with the valve seat 3c and the valve element 9, and covers the mover 11 around the mover 11. A cylindrical portion 10a that slidably supports in the axial direction;
A regulating portion for regulating a moving range of the mover on a side (rear end side) different from the valve body;

An elastically deformable portion 10c that is elastically deformable in the axial direction is integrally provided at the end (front end) of the mover holding sleeve 10 on the valve body 9 side. This elastic deformation portion 10c
Is in contact with the tip end 6a 'of the plate inner peripheral portion 6a (corresponding to another member) and is fixed in an elastically deformed state, and is provided with a concave and convex shape having a substantially S-shaped cross section. Root portion 10 of elastic deformation portion 10c provided in this uneven shape
c ′ is pressed toward the plate 6 (corresponding to another member) by the tip end portion 7a ′ of the yoke inner peripheral portion 7a, whereby the elastically deformable portion 10c is fixed in an elastically deformed state.

The mover 11 is held in the coil 2 coaxially with the valve body 9 by the mover holding sleeve 10. When the coil 2 receives a current and generates a magnetic force, the valve body sleeve 8 The magnetic circuit is sucked and forms a closed magnetic circuit together with the plate 6, the yoke 7, and the sleeve 8 for the valve body. When the mover 11 is sucked into the valve body sleeve 8, the valve body 9 is pressed against the valve seat 3c to close the valve seat 3c.

[Operation of Solenoid Valve 1] Next, the operation of the solenoid valve 1 when not energized and when energized will be described. When no power is supplied to the terminal 4 (when no power is supplied), the coil 2 does not generate a magnetic force, and the valve 9 is slidable together with the mover 11. For this reason, the valve element 9 separates from the valve seat 3c by the hydraulic pressure supplied from the import 3b,
The oil supplied to the import 3b flows out to the out port 3d via the valve seat 3c.

(Electrification) When power is supplied to the terminal 4, the coil 2 generates a magnetic force, and the movable element 11 is attracted and overcomes the urging force of the supplied hydraulic pressure to press the valve 9 against the valve seat 3c. For this reason, the valve seat 3c is closed, and the outflow of oil from the import 3b to the out port 3d is shut off.

[Manufacturing Process of Solenoid Valve 1] Next, the order of assembling the solenoid valve 1 having the above-described structure will be described. 1) The plate 6 is insert-molded on the base 3 made of a resin mold. 2) After winding the coil 2 around the coil bobbin 3a, the terminal 4 bent into a predetermined shape is press-fitted into the base 3, and the leading end of the coil 2 is fixed by fusing. Instead of this step, after the straight terminal 4 is press-fitted into the base 3, the coil 2 is wound around the coil bobbin 3a, the terminal 4 is bent into a predetermined shape, and then the leading end of the coil 2 is fixed by fusing. May be.

3) The connector portion 5 is formed by resin molding. 4) The sleeve 8 for the valve body is press-fitted inside the inner peripheral portion 6a of the plate. At this time, the valve body sleeve 8 is press-fitted to a position where it comes into contact with the base 3. 5) Insert the valve element 9 inside the valve element sleeve 8. 6) Insert the mover 11 into the mover holding sleeve 10;
This is inserted inside the coil bobbin 3a. 7) Finally, the coil bobbin 3a and the mover holding sleeve 1
The yoke 7 is assembled so that the inner peripheral portion 7a of the yoke is inserted between the positions 0, and the front end of the yoke 7 is caulked and fixed to the plate 6 side. At this time, the elastic deformation portion 10c elastically deforms between the plate 6 and the yoke 7, thereby absorbing a dimensional error in the axial direction.

[Effects of the Embodiment] The solenoid valve 1 of this embodiment is
As shown in the above manufacturing process, the mover holding sleeve 1
The elastically deforming portion 10c integrally provided at the end of the zero acts as a conventional wave washer, and the mover holding sleeve 10 is fixed to the solenoid valve 1. That is, the mover holding sleeve 10 is fixed to the solenoid valve 1 without using a joining step such as welding or using a special fixing member such as a wave washer. Thus, as compared with the related art, the number of steps or the number of parts is reduced, so that the assembling of the solenoid valve 1 is facilitated and the manufacturing cost of the solenoid valve 1 can be reduced.

The elastically deforming portion 10c is provided in an uneven shape in cross section, and its tip is held in contact with the tip portion 6a 'of the plate 6 so that an axial direction generated between the plate 6 and the armature holding plate 10 is obtained. Of the elastic deformation part 10
It can be absorbed by the deformation amount of c. Further, the elastic deformation portion 1
By abutting the tip of Oc on the tip 6a 'of the plate 6, the magnetic circuit is not changed from the conventional structure.
The mover holding sleeve 10 can be formed.

[Modification] In the above embodiment, the solenoid valve 1 in which the valve body 9 is moved to the open position by hydraulic pressure when no power is supplied.
The present invention is applied to the solenoid valve 1 which urges the valve element 9 with a spring, and when the coil 2 is energized, the mover 11 overcomes the urging force of the spring to drive the valve element 9. The present invention may be applied.

In the above embodiment, an example in which the elastically deformable portion 10c is constituted by the substantially S-shaped unevenness is shown. For example, the elastically deformable portion 10c may be formed in another shape. In the above-described embodiment, an example in which the elastic deformation portion 10c is elastically deformed by contacting the plate 6 has been described. It may be provided so as to be deformed.

[Brief description of the drawings]

FIG. 1 is a sectional view of a solenoid valve 1. FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 solenoid valve 2 coil 3 a coil bobbin 3 c valve seat 6 plate 6 a ′ tip of plate 7 yoke 7 a ′ tip of yoke 9 valve body 10 mover holding sleeve 10 a cylindrical portion 10 b regulating portion 10 c elastic deformation portion 10 c ′ root portion 11 movable Child

Claims (2)

[Claims] (A) a valve seat through which a fluid can pass; (b) a movable valve body that opens and closes the valve seat; (c) a coil that generates a magnetic force when energized; (d) A mover for urging the valve body in a predetermined direction by receiving a magnetic force generated by the coil; (e) a holder for covering the periphery of the mover and holding the mover; A movable portion in which a regulating portion for regulating the range and an elastically deformable elastically deformable portion provided on the valve body side are integrally provided, and the elastically deformable portion abuts on another member and is fixed in an elastically deformed state. An electromagnetic valve comprising a child holding sleeve. 2. The solenoid valve according to claim 1, wherein the elastically deformable portion is provided in an uneven shape, and a root of the cylindrical portion is formed by a tip of a yoke constituting a part of a magnetic circuit. The electromagnetic valve, wherein the other member that is pressed toward the member and that is in contact with the elastic deformation portion is a plate that forms a part of a magnetic circuit or a coil bobbin around which the coil is wound.