JPH10169822A - Solenoid valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solenoid valve which can be adapted to normal close type or normal open type selectively with the same parts. SOLUTION: A solenoid valve 33 has a shaft 25 having a port 33, a movably arranged plunger 41, a coil spring 43 which urges the plunger 41 in one direction, an electromagnetic coil 3 which energizes the plunger 41 by electromagnetic force in the direction opposite to the coil spring 43, first and second cores 7, 15 arranged on both sides of the plunger 41 in its moving direction, through which magnetic flux passes. First and second passages 14, 23 are independently arranged on the first core 7 and the second core 15. A stopper 38 blocks either one of the first and second passages 14, 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic valve used for an actuator of a hydraulic control device of an automatic transmission for a vehicle, for example.

[0002]

2. Description of the Related Art Generally, automatic transmissions for various industrial machines, for example, vehicles, have their gears set by engagement / disengagement of a friction engagement device. Driving performance is affected. Therefore, in a hydraulic control device that controls the engagement and release of the friction engagement device, an electromagnetic valve is used as an actuator for electrically controlling the hydraulic pressure. There is Japanese Patent Application No. 7-318607 proposed earlier.

[0003] The solenoid valve described in this application includes a cylindrical electromagnetic coil, a shaft-shaped structural member disposed inside the electromagnetic coil and having a port, and an axially extending outer circumferential side of the structural member. A cylindrical valve body movably mounted, a first sub-structure member and a second sub-structure member disposed on both sides of the valve body in the axial direction, and a compression spring for urging the valve body in one of the axial directions And Note that a flow path communicating with the port is formed in the sub-structure member. Here, parts such as the structural member, the valve element, the first sub-structure member, and the second sub-structure member are manufactured by a processing method such as pressing, cold forging, sintering, or cutting. Further, the valve body, the first sub-structure member, and the second sub-structure member are made of a magnetic material.

The above-mentioned solenoid valve has its port closed by a valve body biased by a compression spring when the electromagnetic coil is not energized. On the other hand, in the energized state of the electromagnetic coil, a magnetic circuit is formed by the first sub-structure member and the second sub-structure member, the casing, and the valve body. The port is opened by being urged in a direction in which the magnetic reluctance of the magnetic flux passing through, ie, in the direction opposite to the urging force of the compression spring. In other words, the solenoid valve described in this application closes the port when the electromagnetic coil is not energized,
It functions as a so-called normally closed solenoid valve.

On the other hand, in the above-mentioned hydraulic control device, a so-called normally open type solenoid valve whose port is opened when the electromagnetic coil is energized may be used. It is determined based on conditions such as the target and the place of use.

[0006]

However, since the solenoid valve described in the above-mentioned application is of a normally closed type, in order to be able to select either the normally closed type or the normally closed type, the solenoid valve must be individually closed. The parts corresponding to the format must be prepared separately.
As a result, there has been a problem that the manufacturing cost, the manufacturing cost, and the manufacturing equipment, the number of man-hours, and the manufacturing time of the parts increase.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an electromagnetic valve that can completely use components used in a normally closed type and a normally open type.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a structural member having a port, a movably disposed valve element, and biasing the valve element in one direction. An elastic body, an electromagnetic coil for urging the valve body in a direction opposite to the elastic body by an electromagnetic force, and separately mounted on both sides of the structural member in the moving direction of the valve body, and a magnetic flux of the electromagnetic coil. A first sub-structure member and a second sub-structure member, through which the first and second sub-structure members are moved by the electromagnetic force of the electromagnetic coil to open and close the port. It is characterized by comprising a first passage and a second passage separately formed in the sub-structure member, and a sealing portion for closing one of the first passage and the second passage.

According to the present invention, one of the first passage and the second passage is closed by the sealing portion, so that the positions of attachment of the first sub structural member and the second sub structural member to the structural member are switched. In this case, it is possible to prevent the working fluid from leaking from one of the passages. Therefore, by replacing the mounting positions of the first sub-structure member and the second sub-structure member with each other, and changing the biasing direction of the elastic body with respect to the valve body, the same coil is used to turn off the electromagnetic coil. Thus, it is possible to selectively manufacture solenoid valves having different opening / closing states of the ports, and to reduce as much as possible the manufacturing equipment, the number of man-hours, and the manufacturing time of parts, thereby suppressing the manufacturing cost.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) Next, a first embodiment in which the present invention is applied to a three-way valve will be described with reference to FIGS. FIG. 1 is a cross-sectional view when the solenoid valve 1 is applied as a normally open type, and FIG. 2 is a cross-sectional view when the solenoid valve 1 is applied as a normally closed type. For convenience, first, the configuration of the solenoid valve 1 will be described with reference to FIG. In FIG. 1, reference numeral 2 denotes a yoke formed in a cylindrical shape, and an electromagnetic coil 3 is housed inside the yoke 2. An inward flange 4 is formed at one end of the yoke 2 in the direction of the axis A, and an inward flange 5 is formed at the other end.

The inside diameter of the inward flange 4 is set substantially equal to the inside diameter of the electromagnetic coil 3, and the inside diameter of the inward flange 5 is set larger than the inside diameter of the inward flange 4. A disk-shaped plate 6 is arranged between the inward flange 5 and the electromagnetic coil 3, and the electromagnetic coil 3 is clamped and fixed between the plate 6 and the inward flange 4. The inner diameter of the plate 6 is set to be smaller than the inner diameter of the electromagnetic coil 3.

A cylindrical first core 7 is provided on the inner periphery of the plate 6.
Has been fixed. The fixing of the first core 7 is achieved by means such as press-fitting, caulking, and welding. First core 7
Has a cylindrical portion 8 and an outward flange 9, and a step portion 10 is formed at a boundary between the cylindrical portion 8 and the outward flange 9.

The outward flange 9 is arranged on the outside of the yoke 2, and the cylindrical portion 8 is arranged on the inside of the yoke 2. In addition, the cylindrical portion 8 is fixed to the inner periphery of the plate 6, and the
And the plate 6 are positioned in the direction of the axis A.

Further, a large-diameter inner peripheral surface 1 is provided on the inner periphery of the first core.
1 and a small-diameter inner peripheral surface 12 set to an inner diameter smaller than the large-diameter inner peripheral surface 11, and the large-diameter inner peripheral surface 11 and the small-diameter inner peripheral surface 12 are formed.
A step 13 is formed at the boundary between the steps. Small diameter inner peripheral surface 1
2 is located inside the yoke 2, and the large-diameter inner peripheral surface 11 is located outside the yoke 2. And the small diameter inner peripheral surface 12
, A plurality of first passages 14 in the direction of the axis A are formed in the circumferential direction.

On the other hand, a cylindrical second core 15 is disposed inside the electromagnetic coil 3 on the side of the inward flange 4. The second core 15 has a cylindrical portion 16 and an outward flange 17, and a step 18 is formed at a boundary between the cylindrical portion 16 and the outward flange 17.

Further, the outer diameter of the outward flange 9 of the first core 7 and the outer diameter of the outward flange 17 of the second core 15 are set to be substantially the same, and the outer diameter of the cylindrical portion 8 of the first core 7 is set. And the outer diameter of the cylindrical portion 16 of the second core 15 are set substantially the same. The outward flange 17 is fixed to the inner periphery of the inward flange 4. This fixing is achieved by means such as press-fitting, caulking, welding or the like.

A yoke 2 is provided on the inner periphery of the second core 15.
From the outside to the inside, a large-diameter inner peripheral surface 19 and a small-diameter inner peripheral surface 2 set to an inner diameter smaller than the inner diameter of the large-diameter inner peripheral surface 19.
0 and the magnetic flux passage surface 21 are sequentially formed. Also,
A step 22 is formed at the boundary between the large-diameter inner peripheral surface 19 and the small-diameter inner peripheral surface 20. A plurality of second passages 23 in the direction of the axis A are formed in the small-diameter inner peripheral surface 20 in the circumferential direction.

Further, the inner diameter of the large-diameter inner peripheral surface 19 and the magnetic flux passage surface 21 of the first core 15 and the inner diameter of the large-diameter inner peripheral surface 11 of the first core 7 are set to be substantially the same. The inner diameter of the small-diameter inner peripheral surface 20 and the inner diameter of the small-diameter inner peripheral surface 12 of the first core 7 are set to be substantially the same. Furthermore, the magnetic flux passage surface 21 and the small-diameter inner peripheral surface 20 are connected by an annular inclined surface 24, and the inclined surface 24 has an inclination whose diameter decreases from the inside to the outside of the yoke 2.

A shaft 25 is arranged from inside the first core 7 to inside the second core 15. The shaft 25 has a large-diameter outer peripheral surface 27 having an outward flange 26.
And a valve body holding surface 28 set to an outer diameter less than the outer diameter of the large diameter outer peripheral surface 27, and a small diameter outer peripheral surface 29 set to an outer diameter less than the outer diameter of the valve body holding surface 28. .

The shaft 25 is disposed around the axis A, the outward flange 26 is disposed outside the first core 7, and the large-diameter outer peripheral surface 27 is connected to the small-diameter internal peripheral surface 12 of the first core 7.
, And the small-diameter inner peripheral surface 29 is inserted into the second core 15. The outer diameter of the valve body holding surface 28 is set to be smaller than the inner diameter of the small diameter inner peripheral surface 12 of the first core 7 and the small diameter inner peripheral surface 20 of the second core 15.

On the other hand, in the shaft 25, an inflow path 30 in the direction of the axis A is formed from the outer end face 25A of the yoke 2 toward the inner side of the yoke 2, and the shaft 25 has a small-diameter outer peripheral face 29 side end face 25B. A discharge path 31 in the direction of the axis A is formed toward the inside of the yoke 2. An annular groove 32 is formed at a boundary between the large-diameter outer peripheral surface 27 and the valve element holding surface 28, and the annular groove 32 and the inflow path 30 are communicated by a port 33. Further, the annular groove 32 and the large-diameter outer peripheral surface 2
7 are connected by an annular first contact surface 34.

An annular groove 35 is formed at the boundary between the small-diameter outer peripheral surface 27 and the valve element holding surface 28, and the annular groove 35 and the discharge path 31 are communicated by a port 36. Further, the annular groove 35 and the small diameter outer peripheral surface 29 are connected by an annular step 37. The step portion 37 is disposed inside the magnetic flux passage surface 21 of the second core 15.

Further, a cylindrical stopper 38 is fixed to the small diameter outer peripheral surface 29 of the shaft 25. Stopper 3
8 has a cylindrical portion 38 </ b> A and an outward flange 39, and the outward flange 39 is a large-diameter inner peripheral surface 1 of the second core 15.
9 is fixed.

The outer diameter of the cylindrical portion 38A of the stopper 38 is set larger than the outer diameter of the valve body holding surface 28 of the shaft 25, and the cylindrical portion 38A of the stopper 38 is fixed to the small-diameter inner peripheral surface 20 of the second core 15. Have been. Yoke 2 of stopper 38
A second contact surface 39 formed on the inner end surface of the shaft 25 is in contact with the step portion 37 of the shaft 25.

With the above configuration, the electromagnetic coil 3 and the shaft 2
5, an annular valve body storage chamber 40 is formed.
The passage 14 and the second passage 23 communicate with the valve body storage chamber 40, and the annular grooves 32 and 35 face the valve body storage chamber 40.

The interior of the valve body storage chamber 40, that is, the shaft 2
5, a cylindrical plunger 4 is provided on the outer periphery of the valve body holding surface 28.
1 is attached. The length of the plunger 41 in the direction of the axis A is set shorter than the distance between the first contact surface 34 and the second contact surface 39. The inner diameter of the plunger 41 is set to be larger than the outer diameter of the valve body holding surface 28. Therefore, the plunger 41 and the shaft 25 can relatively move in the direction of the axis A.

An annular rib 42 is formed on the outer periphery of the plunger 41 at a substantially intermediate position in the direction of the axis A. The outer diameter of the rib 42 is set to be smaller than the inner diameter of the electromagnetic coil 3. Further, the outer diameter of the plunger 41 other than the rib 42 is set substantially uniformly in the direction of the axis A.

Further, a coil spring 43 is mounted on the outer periphery of the plunger 41, that is, between the rib 42 and the first core 7. The winding inner diameter of the coil spring 43 is
The outer diameter of the plunger 41 is set larger than the outer diameter of the rib 42. The inner diameter of the coil of the coil spring 43 is set substantially uniformly in the direction of the axis A. The plunger 41 is urged toward the stopper 28 in the direction of the axis A by the elastic force of the coil spring 43.

The yoke 2, which constitutes the solenoid valve 1 having the above structure,
Plate 6, first core 7, second core 15, plunger 4
1 is formed of a ferromagnetic material, for example, steel, and the shaft 25 and the stopper 38 are formed of a paramagnetic material, for example, resin. These parts are manufactured by working methods such as press working, sintering, cold forging, and cutting.

Here, the correspondence between the structure of the embodiment and claim 1 will be described. The shaft 25 corresponds to a structural member.
The plunger 41 corresponds to the valve body, and the coil spring 43
Corresponds to an elastic body, the first core 7 corresponds to a first sub-structure member, the second core 15 corresponds to a second sub-structure member, and the stopper 38 corresponds to a sealing portion.

The electromagnetic valve 1 configured as described above is used, for example, as an actuator of a hydraulic control device for controlling an automatic transmission of a vehicle. Specifically, the inflow path 3 of the solenoid valve 1
0 is communicated with a hydraulic pressure source (not shown), the first passage 12 is communicated with a control target portion (not shown), and the discharge passage 31 is communicated with an oil pan (not shown). The electromagnetic valve 1 to which the components are attached as shown in FIG. 1 functions as a so-called normally open type electromagnetic valve in which the port 33 is opened when the electromagnetic coil 3 is not energized. Hereinafter, the operation of the solenoid valve 1 of FIG. 1 will be described.

First, when the electromagnetic coil 3 is not energized, the plunger 41 is moved by the elastic force of the coil spring 43.
Is urged toward the stopper 38 side. For this reason, the end surface 44 of the plunger 41 on the stopper 38 side contacts the second contact surface 39 of the stopper 38 to close the port 36, while the end surface 45 of the plunger 41 on the first core 7 side is The port 33 is open apart from the one contact surface 34. Therefore, the oil pressure of the oil pressure source acts on the control target portion via the inflow passage 30, the port 33, the valve body storage chamber 40, and the first passage.

Here, a stopper 38 is fixed to the inner periphery of the second core 15, and the second passage 23 of the second core 15 and the outside of the yoke 2 are shut off. Is prevented from leaking to the outside of the yoke 2 through the second passage 23.

On the other hand, when the electromagnetic coil 3 of the solenoid valve 1 is energized, a magnetic circuit is formed by the yoke 2, the plate 6, the first core 7, the plunger 41, and the second core 15.
Since the magnetic flux passage surface 21 is formed in the second core 15, the plunger 41 is magnetically attracted to the first core 7 against the elastic force of the coil spring 43. The second
Since the inclined surface 24 is formed in the core 15 and the magnetic force generated between the core 15 and the end surface 44 of the plunger 41 is weakened, the plunger 41 moves smoothly.

As a result, after the end surface 44 of the plunger 41 is separated from the second contact surface 39 and the port 36 is opened, the end surface 45 of the plunger 41 contacts the first contact surface 34 and the port 33 is closed. You. Accordingly, the hydraulic pressure of the hydraulic pressure source does not act on the valve body storage chamber 40, and the oil pressure acting on the control target part is discharged to the outside of the solenoid valve 1 through the valve body storage chamber 40, the port 36, and the discharge path 31. Is done.

FIG. 2 shows a case in which the mounting position of the components constituting the solenoid valve 1 is changed, and functions as a so-called normally closed solenoid valve in which the port 33 is closed when the solenoid coil 3 is not energized. Comparing the solenoid valve 1 of FIG. 1 with the solenoid valve 1 of FIG. 2, the first core 7 and the second core 1
5. The mounting position of the coil spring 43 is different.

That is, in the solenoid valve 1 shown in FIG. 2, the cylindrical portion 16 of the second core 15 is fixed to the inner periphery of the plate 6, and the outward flange 17 of the second core 15 is disposed outside the yoke 2. . The large-diameter outer peripheral surface 27 of the shaft 25 is fixed to the small-diameter internal peripheral surface 20 of the second core 15.

On the other hand, the outward flange 9 of the first core 7 is fixed to the inner periphery of the inward flange 4 of the yoke 2, and the cylindrical portion 38 A of the stopper 38 is fixed to the small-diameter inner peripheral surface 12 of the first core 7. I have. In addition, the outward flange 3 of the stopper 38
9 is fixed to the large-diameter inner peripheral surface 11 of the first core 15.
Further, the coil spring 43 includes the rib 42 and the first core 7.
Is mounted between the end face 7A and the end face 7A. The mounting positions of the other components are the same as in FIG. In the solenoid valve 1 of FIG. 2, the second passage 23 of the second core 15 communicates with the control target.

Next, the operation of the solenoid valve 1 of FIG. 2 will be described. First, when the electromagnetic coil 3 is not energized, the plunger 41 is urged toward the second core 15 by the elastic force of the coil spring 43. For this reason, the plunger 41
The end surface 44 of the plunger 41 is in contact with the first contact surface 34 to close the port 33, while the end surface 44 of the plunger 41 is separated from the second contact surface 39 and the port 36 is open. Therefore, the hydraulic pressure of the hydraulic pressure source does not act on the control target portion, and the hydraulic pressure of the control target portion is discharged to the outside of the solenoid valve 1 through the second passage 23, the valve body storage chamber 40, and the discharge passage 31.

Here, the stopper 3 is provided on the inner periphery of the first core 7.
8 is fixed, and the first passage 14 of the first core 7 and the outside of the yoke 2 are shut off.
The oil inside is prevented from leaking out of the yoke 2 via the first passage 14.

On the other hand, when the electromagnetic coil 3 of the solenoid valve 1 is energized, a magnetic circuit is formed by the yoke 2, the plate 6, the first core 7, the plunger 41, and the second core 15.
Since the magnetic flux passage surface 21 is formed in the second core 15, the plunger 41 is magnetically attracted to the first core 7 against the elastic force of the coil spring 43. The second
Since the inclined surface 24 is formed in the core 15 and the magnetic force generated between the core 15 and the end surface 44 of the plunger 41 is weakened, the plunger 41 moves smoothly.

As a result, after the end surface 45 of the plunger 41 is separated from the first contact surface 34 and the port 33 is opened, the end surface 44 of the plunger 41 contacts the second contact surface 39 and the port 36 is closed. You. Therefore, the hydraulic pressure of the hydraulic pressure source is applied to the inflow passage 30, the port 33, the valve body storage chamber 40, and the second passage 23.
And acts on the control target unit through.

As described above, according to the first embodiment, the outer diameter of the cylindrical portion 8 of the first core 7, the outer diameter of the cylindrical portion 16 of the second core 15, and the inner diameter of the plate 6 are substantially the same. The outer diameter of the outward flange 9 of the first core 7, the outer diameter of the outward flange 17 of the second core 15, and the inner diameter of the inward flange 4 are set to be substantially the same.

The inner diameter of the small-diameter inner peripheral surface 12 of the first core 7, the inner diameter of the small-diameter inner peripheral surface 20 of the second core 15, the outer diameter of the cylindrical portion 27 of the shaft 25, and the cylindrical portion 38 of the stopper 38.
The outer diameter of A is set to be substantially the same, the inner diameter of the large-diameter inner peripheral surface 11 of the first core 15, the inner diameter of the large-diameter inner peripheral surface 19 of the second core 15, and the outer flange 39 of the stopper 38. The outer diameter is set substantially the same.

Therefore, the positions where the first core 7 and the second core 15 are attached to each other can be interchanged. Further, since the outer diameter of the plunger 41 is set to be substantially uniform in the direction of the axis A and the inner diameter of the coil spring 43 is set to be larger than the outer diameter of the plunger 41, the coil spring 43 is attached to either side of the rib 42. Can be mounted.

Further, regardless of which of the first core 7 and the second core 15 is mounted, the first passage 14 or the second
Since one of the passages 23 is closed by the stopper 38, it is possible to prevent oil from leaking to the outside from one of the passages.

Therefore, by changing the arrangement positions of the first core 7, the second core 15, and the coil spring 43,
Either the normally open type or the normally closed type solenoid valve 1 can be selectively manufactured using the same parts. Therefore, the manufacturing equipment, manufacturing man-hours, and manufacturing time of the components constituting the solenoid valve 1 are reduced as much as possible, and the manufacturing cost can be suppressed.

(Second Embodiment) Next, a second embodiment in which the present invention is applied to a three-way valve will be described with reference to FIGS. FIG. 3 is a cross-sectional view when the solenoid valve 51 of the present invention is used as a normally open solenoid valve, and FIG.
It is sectional drawing which shows the case where 1 is used as a normally closed type solenoid valve. For convenience, first, the configuration of the solenoid valve 1 will be described with reference to FIG. In FIG. 3, the yoke 2, the electromagnetic coil 3, the plate 6, the first core 7, and the second core 15 are configured in substantially the same manner as in the first embodiment.

The shaft 5 is provided inside the first core 7.
2 has been inserted. The shaft 52 has a cylindrical portion 53 and an outward flange 54. The shaft 52 is arranged around the axis A, and the cylindrical portion 53 is fixed to the small-diameter inner peripheral surface 12 of the first core 7.

On the other hand, the shaft 52 is formed with an inflow path 56 in the direction of the axis A penetrating from the outer end face 52A of the yoke 2 to the inner end face 55 of the yoke 2, and the inflow path 56 has a port 57 at the end face 55. Has formed. The end face 55
And the end face 58 of the first core 7 on the inner side of the yoke 2 are set substantially flush.

Further, a cylindrical stopper 59 is inserted inside the second core 15. The stopper 59 has a cylindrical portion 60 and an outward flange 61, and the outward flange 61 is fixed to the large-diameter inner peripheral surface 19 of the second core 15. Further, the cylindrical portion 60 is formed on the small-diameter inner peripheral surface 2 of the second core 15.
It is fixed to 0. The outer diameter of the cylindrical portion 60 is
The outer diameter of the second cylindrical portion 53 is set to be substantially the same as that of the second cylindrical portion 53.

The stopper 59 is formed with a discharge passage 62 extending in the direction of the axis A.
A port 64 is opened in an end face 63 on the inner side of the. The opening diameter of the port 57 of the shaft 52 and the opening diameter of the port 64 of the stopper 59 are set substantially the same.

The length of the stopper 59 in the direction of the axis A is set to be less than the length of the second core 15 in the direction of the axis A.
The end face 63 of the stopper 59 is arranged at a substantially halfway position in the direction of the axis A of the magnetic flux passage surface 21 of the second core 15. The length of the stopper 59 in the direction of the axis A and the length of the first core 7 in the direction of the axis A are set to be substantially the same.

A valve housing chamber 65 is formed in a space surrounded by the electromagnetic coil 3, the shaft 52 and the stopper 58. The shaft 5 in the valve body storage chamber 65
A ball 66 is stored between the stopper 2 and the stopper 59. The outer diameter of the ball 66 is set to be smaller than the inner diameter of the magnetic flux passage surface 21 and larger than the opening diameter of the ports 57 and 64. The outer diameter of the ball 66 is
Is set to be smaller than the interval in the direction of the axis A between the end face 63 and the end face 63. The ball 66 can be moved in the direction of the axis A by the above-described dimension setting. Further, a coil spring 67 is disposed in the valve body storage chamber 65.
7 is wound in a conical shape, and the inside diameter of the end on the small diameter side of the coil spring 67 is set to be smaller than the outside diameter of the ball 66. The large-diameter end of the coil spring 67 is in contact with the end face 58 of the first core 7, and the small-diameter end is in contact with the ball 66. This coil spring 67
Of the ball 66 in the direction of the axis A by the elastic force of
Is being urged towards.

The yoke 2, the plate 6, the first core 7, the second core 15, and the ball 6, which constitute the solenoid valve 51 having the above configuration,
6 is formed of a magnetic material, such as steel,
2. The stopper 59 is formed of a non-magnetic material, for example, resin. These components are manufactured by a processing method such as pressing, sintering, cold forging, and cutting.

Here, the correspondence between the structure of the second embodiment and claim 1 will be described.
9 corresponds to a structural member, the ball 66 corresponds to a valve body, the coil spring 67 corresponds to an elastic body, the first core 7 corresponds to a sub-structure member, and the second core 15 corresponds to a second sub-structure member. The stopper 59 corresponds to the closing portion.

The solenoid valve 51 is used as an actuator of a hydraulic control device, the inflow passage 56 is communicated with a hydraulic source (not shown), the first passage 12 is communicated with a controlled object (not shown), and the discharge is performed. Road 62 is an oil pan (not shown)
Is communicated to. The solenoid valve 51 in FIG. 3 functions as a so-called normally open solenoid valve in which the port 57 is opened when the solenoid coil 3 is not energized. Less than,
The operation of the solenoid valve 51 of FIG. 3 will be described.

First, when the electromagnetic coil 3 is not energized, the ball 66 is urged toward the stopper 59 by the elastic force of the coil spring 67 so that the port 64 of the stopper 59 is closed while the port 57 is opened. I have. Therefore, the hydraulic pressure of the hydraulic pressure source acts on the control target portion via the inflow path 56, the port 57, the valve body storage chamber 65, and the first passage 14.

Here, a stopper 59 is fixed to the inner periphery of the second core 15, and the second passage 23 of the second core 15 is cut off from the outside of the yoke 2. Is prevented from leaking to the outside of the yoke 2 through the second passage 23.

On the other hand, when the electromagnetic coil 3 of the electromagnetic valve 51 is energized, a magnetic circuit is formed by the yoke 2, the plate 6, the first core 7, the ball 66, and the second core 15. Since the magnetic flux passing surface 21 is formed on the second core 15, the ball 66 resists the elastic force of the coil spring 67, and the magnetic resistance of the magnetic flux passing between the ball 66 and the magnetic flux passing surface 21 is reduced. It is magnetically attracted to the weakened direction, that is, to the first core 7 side.

As a result, after the ball 66 separates from the stopper 59 and the port 64 is opened, the ball 66 contacts the shaft 52 and the port 57 is closed. Therefore, the oil pressure of the oil pressure source does not act on the valve body housing chamber 65, and the oil pressure acting on the control target part is reduced by the valve body housing chamber 6.
5, discharged through the port 64 and the discharge path 62 to the outside of the solenoid valve 51.

FIG. 4 shows a case in which the mounting position of the parts constituting the solenoid valve 51 is changed, and functions as a so-called normally-closed solenoid valve in which the port 57 is closed when the electromagnetic coil 3 is not energized. The solenoid valve 51 of FIG.
4 and the solenoid valve 51 of FIG.
The mounting positions of the core 15 and the coil spring 67 are different.

That is, in the solenoid valve 51 of FIG. 4, the cylindrical portion 16 of the second core 15 is fixed to the inner periphery of the plate 6,
An outward flange 17 of the core 15 is disposed outside the yoke 2. The cylindrical portion 53 of the shaft 52 is fixed to the small-diameter inner peripheral surface 20 of the second core 15.

On the other hand, the outward flange 9 of the first core 7 is fixed to the inner periphery of the inward flange 4 of the yoke 2, and the cylindrical portion 60 of the stopper 59 is fixed to the small-diameter inner peripheral surface 12 of the first core 7. I have. Also, the outward flange 61 of the stopper 59
Are fixed to the large-diameter inner peripheral surface 11 of the first core 15. Further, the large-diameter end of the coil spring 66 is in contact with the end face 58 of the first core 7, and the small-diameter end is in contact with the ball 66. Figure 3 shows the mounting positions of other parts.
It is the same as that of the solenoid valve. In the solenoid valve 51 of FIG. 4, the second passage 23 of the second core 15 communicates with the control target.

Next, the operation of the solenoid valve 1 of FIG. 4 will be described. First, when the electromagnetic coil 3 is not energized, the ball 66 is moved by the elastic force of the coil spring 67 to the shaft 5.
It is biased to two sides. For this reason, the ball 66 is
5, while the port 57 is closed while the ball 66 is separated from the end face 63 and the port 64 is open. Therefore, the hydraulic pressure of the hydraulic pressure source does not act on the control target portion, and the hydraulic pressure of the control target portion is changed to the second passage 23, the valve body storage chamber 6
5. Discharged to the outside of the solenoid valve 1 through the discharge path 62.

Here, a stopper 5 is provided on the inner periphery of the first core 7.
9 is fixed, and the first passage 14 of the first core 7 and the outside of the yoke 2 are shut off.
The oil inside is prevented from leaking out of the yoke 2 via the first passage 14.

On the other hand, when the electromagnetic coil 3 of the electromagnetic valve 51 is energized, a magnetic circuit is formed by the yoke 2, the plate 6, the first core 7, the ball 66, and the second core 15. Since the magnetic flux passing surface 21 is formed on the second core 15, the ball 66 resists the elastic force of the coil spring 67, and the magnetic resistance of the magnetic flux passing between the ball 66 and the magnetic flux passing surface 21 is reduced. It is magnetically attracted to the weakened direction, that is, to the first core 7 side.

As a result, after the ball 66 is separated from the shaft 52 and the port 57 is opened, the ball 66 contacts the stopper 59 and the port 64 is closed. Therefore, the hydraulic pressure of the hydraulic pressure source acts on the control target portion via the inflow path 56, the port 57, the valve body storage chamber 65, and the second passage 23.

As described above, according to the second embodiment, the outer diameter of the cylindrical portion 8 of the first core 7, the outer diameter of the cylindrical portion 16 of the second core 15, and the inner diameter of the plate 6 are substantially the same. The outer diameter of the outward flange 9 of the first core 7, the outer diameter of the outward flange 17 of the second core 15, and the inner diameter of the inward flange 4 are set to be substantially the same.

The inner diameter of the small-diameter inner peripheral surface 12 of the first core 7, the inner diameter of the small-diameter inner peripheral surface 20 of the second core 15, the outer diameter of the cylindrical portion 53 of the shaft 52, and the cylindrical portion 60 of the stopper 59.
Of the first core 15, the inner diameter of the large diameter inner peripheral surface 19 of the second core 15, and the outer diameter of the outer flange 61 of the stopper 59. The diameter is set to be almost the same.

Therefore, the positions where the first core 7 and the second core 15 are attached to each other can be interchanged. Further, since the inner diameter of the coil spring 67 on the small diameter side that contacts the ball 66 is set to be smaller than the outer diameter of the ball 66, the end of the coil spring 67 on the small diameter side can contact both sides in the moving direction of the ball 66. is there.

Further, regardless of which of the first core 7 and the second core 15 is attached, the first passage 14 or the second
Since one of the passages 23 is closed by the stopper 59, it is possible to prevent oil from leaking out of one of the passages.

Therefore, by changing the arrangement positions of the first core 7, the second core 15, and the coil spring 67,
Either the normally open type or the normally closed type solenoid valve 51 can be selectively manufactured using the same parts. Therefore, the manufacturing equipment, the number of manufacturing steps, and the manufacturing time of the parts of the solenoid valve 51 are reduced as much as possible, and the manufacturing cost can be suppressed.

[0074]

As described above, according to the present invention, even if the positions of attachment of the first sub-structure member and the second sub-structure member to the structural member are exchanged, one of the first passage and the second passage can be used. Are closed by the seal. Therefore, by replacing the mounting positions of the first sub-structure member and the second sub-structure member with each other and changing the biasing direction of the elastic body with respect to the valve body, the non-energized state of the electromagnetic coil using the same component Thus, it is possible to selectively manufacture solenoid valves having different opening / closing states of the ports, and to reduce as much as possible the manufacturing equipment, the number of man-hours, and the manufacturing time of parts, thereby suppressing the manufacturing cost.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a case where a solenoid valve according to a first embodiment of the present invention is used as a normally open type.

FIG. 2 is a sectional view showing a case where the solenoid valve according to the first embodiment of the present invention is used as a normally closed type.

FIG. 3 is a sectional view showing a case where a solenoid valve according to a second embodiment of the present invention is used as a normally open type.

FIG. 4 is a sectional view showing a case where a solenoid valve according to a second embodiment of the present invention is used as a normally closed type.

[Explanation of symbols]

 1,51 Solenoid valve 3 Electromagnetic coil 7 First core 14 First passage 15 Second core 23 Second passage 25,52 Shaft 33,57 Port 38,59 Stopper 41 Plunger 43,67 Coil spring 66 Ball

Claims (1)

[Claims] 1. A structural member having a port, a valve body movably disposed, an elastic body for urging the valve body in one direction, and a direction opposite to the elastic body due to electromagnetic force of the valve body. And a first sub-structure member and a second sub-structure member which are separately attached to both sides of the structural member in the moving direction of the valve body, and through which the magnetic flux of the electromagnetic coil passes, An electromagnetic valve for opening and closing the port by moving the valve body by an electromagnetic force of the electromagnetic coil, wherein a first passage and a second passage formed separately in the first sub-structure member and the second sub-structure member, A closing portion for closing one of the first passage and the second passage.