JPH08109976A - Solenoid valve device - Google Patents

Abstract

PURPOSE: To install a yoke for generating the large electromagnetic attractive force, with the excellent assembly performance, economizing electric power, as for a solenoid valve device equipped with a movable element which displaces, having the electromagnetic attractive force as driving source, on the inner peripheral side of an electromagnetic coil. CONSTITUTION: On the inner peripheral side of an electromagnetic coil 51, a sleeve 33 for enclosing a stator element 34, movable element 35, and a spring 37 is arranged. On the movable element 35, an operating shaft 36 whose one end makes contact with a ball valve 32 is assembled. On the inner peripheral side of an electromagnetic coil 51, a prescribed interval is kept, and a yoke 60 which surrounds the inner peripheral surface, end surface, and the outer peripheral surface of the electromagnetic coil 51 is constituted of a pair of magnetic members 61 and 62 which can be divided in the axial direction of the electromagnetic coil 51. At the upper end of the sleeve 33, a washer 63 for pressing the magnetic member 61 is press-fitted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic valve device, and more particularly to an electromagnetic valve device having a mover on the inner peripheral side of an electromagnetic coil which is displaced by an electromagnetic attraction force according to the amount of magnetic flux flowing therethrough.

[0002]

2. Description of the Related Art Conventionally, there has been known an electromagnetic valve device having a mover on the inner peripheral side of an electromagnetic coil. That is, when a current flows through the electromagnetic coil, magnetic flux surrounding the inner and outer circumferences is generated around the electromagnetic coil. Therefore, when the stator and the mover made of a magnetic material are arranged on the inner circumference side of the electromagnetic coil so as to be separated from each other by a predetermined distance, the magnetic flux flows through the stator, the mover, and the gap between them.

When the magnetic flux flows in this way, an electromagnetic attractive force is generated between the mover and the stator so as to narrow the gap between the mover and the stator, and the mover moves the stator with a force corresponding to the amount of the distributed magnetic flux. Displace to the side. Therefore, the position of the mover can be controlled by controlling the energization state of the electromagnetic coil, and if the mover drives the valve, an electromagnetic valve device is realized.

By the way, in the electromagnetic valve device having the above-described structure, the greater the amount of magnetic flux flowing through the mover and the stator, the greater the electromagnetic attraction force. On the other hand, the magnetic flux flowing through the mover and the stator has a smaller magnetic resistance surrounding the inner and outer circumferences of the electromagnetic coil, and a smaller magnetic resistance of the magnetic circuit formed around the inner and outer circumferences of the electromagnetic coil. It becomes a large amount.

Therefore, it is effective to reduce the magnetic resistance of the magnetic circuit surrounding the electromagnetic coil in order to increase the electromagnetic attraction force acting on the mover while achieving appropriate power saving as the electromagnetic valve device. On the contrary, for example,
JP-A 7-115220 discloses a frame-shaped yoke surrounding upper and lower end surfaces of an electromagnetic coil and a part of an outer peripheral surface of the electromagnetic coil, which is formed by bending a single magnetic plate, and an inner circumference of the electromagnetic coil. A magnetic circuit having a small magnetic resistance surrounding the inner and outer circumferences of the electromagnetic coil by using two auxiliary yokes arranged above and below the electromagnetic coil, each of which is composed of a cylindrical portion that contacts the surface and a flange portion that contacts the end surface of the electromagnetic coil. A solenoid valve device that realizes the above is disclosed.

That is, according to the configuration described in the above publication,
When the stator and the mover are arranged on the inner circumference of the electromagnetic coil with the yoke and the auxiliary yoke assembled, it is adjacent to the inner peripheral surface of the cylindrical portion of the auxiliary yoke arranged on the upper end surface side of the electromagnetic coil. And a stator is disposed adjacent to the inner peripheral surface of the cylindrical portion of the auxiliary yoke disposed on the lower end surface side, and the flange portion of the auxiliary yoke abuts a part of the yoke. It will be in the state of doing.

In this case, the inner and outer peripheries of the electromagnetic coil are substantially surrounded by the magnetic material except for the gap formed between the mover and the stator, and the magnetic flux penetrating the gap is generated. As a magnetic circuit that can be realized, a magnetic circuit having a small magnetic resistance is almost ideally configured. Therefore, according to the solenoid valve device described in the above publication, a sufficiently large electromagnetic attraction force can be applied to the mover while realizing appropriate power saving, and excellent operating characteristics can be realized. .

[0008]

However, in the above-mentioned conventional solenoid valve device, the magnetic circuit surrounding the electromagnetic coil has a yoke formed by bending a single plate, and an auxiliary yoke that is a separate component from this yoke. The configuration is realized by and. Therefore, in order to form a desired magnetic circuit in the above-mentioned conventional apparatus, it is necessary to bend the magnetic plate while the electromagnetic coil is arranged on the magnetic plate that constitutes the yoke. In addition to the processing, it is necessary to properly assemble the auxiliary yoke.

In this sense, the above-mentioned conventional solenoid valve device has a problem that its assembling property is not always good. The present invention has been made in view of the above points, and realizes the magnetic circuit surrounding the inner and outer peripheries of the electromagnetic coil by only a yoke that can be divided into a plurality of pieces in the axial direction of the electromagnetic coil. It is an object of the present invention to provide a solenoid valve device to be solved.

[0010]

The above-mentioned object is to provide a movable element on the inner peripheral side of an electromagnetic coil, which generates an electromagnetic attraction force according to the amount of a magnetic flux flowing therethrough and displaces the electromagnetic attraction force as a drive source. Along with the inner peripheral side of the electromagnetic coil, a predetermined interval is provided, and in the electromagnetic valve device including a yoke provided to surround the inner peripheral surface, the end surface, and the outer peripheral surface of the electromagnetic coil, the yoke includes: The present invention is achieved by an electromagnetic valve device including a plurality of magnetic members that can be divided in the axial direction of the electromagnetic coil, and that when combined, form a predetermined shape that surrounds the electromagnetic coil.

[0011]

In the present invention, the mover generates an electromagnetic attraction force according to the amount of the magnetic flux flowing therethrough, and is displaced by using the electromagnetic attraction force as a drive source. Therefore, the smaller the magnetic resistance of the magnetic circuit formed by surrounding the inner circumference of the electromagnetic coil together with the mover, the larger the driving force applied to the mover.

On the other hand, the inner and outer circumferences of the electromagnetic coil are surrounded by the yoke in addition to being provided with a predetermined space on the inner circumference side on which the mover is arranged. Therefore, most of the inner and outer circumferences of the electromagnetic coil are surrounded by the magnetic material, and a magnetic circuit having a small magnetic resistance is formed. In this case, the yoke surrounding the inner and outer circumferences of the electromagnetic coil is composed of a plurality of magnetic members that can be divided in the axial direction of the electromagnetic coil.
Therefore, in the solenoid valve device according to the present invention, a desired magnetic circuit can be realized only by inserting the magnetic members one by one from both sides of the electromagnetic coil in the axial direction.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partial sectional view showing the overall construction of a solenoid valve device 10 which is an embodiment of the present invention. As shown in the figure, the solenoid valve device 10 includes a housing 20, a valve mechanism 30,
40, electromagnetic coil module 50, yokes 60, 70,
And a cover 80 and the like.

The housing 20 is provided with a plurality of oil passages which are brought into conduction or interruption by driving the valve mechanisms 30 and 40. Since the electromagnetic valve device 10 does not have a characteristic in the configuration of the valve mechanisms 30 and 40, the oil that is turned on or off according to the configuration of the valve mechanism 30 and the state of the valve mechanism 30 is shown in FIG. 1. Only the channels 21, 22 are shown and the valve mechanism 30 will be described below as a representative thereof.

The valve mechanism 30 has one end opened to the oil passage 21,
The communication member 31 has the other end opening to the communication passage 22. At the end of the communication member 31 on the side opening to the oil passage 22,
A valve seat 3 on which an orifice 31a that regulates the flow amount of fluid and a ball valve 32 that is disposed above the communication member 31 are seated
1b is provided. Further, the valve mechanism 30 includes a sleeve 33 that is caulked and fixed to the upper portion of the housing 20 in a protruding state. The sleeve 33 is a tubular member made of a non-magnetic material. Inside the sleeve 33, the stator 34, the mover 35, the actuating shaft 36 that is integrally displaced with the mover 35, and the mover 35 are separated from the stator 34. A spring 37 is inserted to generate a biasing force in the direction.

Here, the stator 34 is press-fitted into the sleeve 33 and is substantially integrated with the sleeve 33,
It does not displace inside it. On the other hand, the mover 35 is
It is slidably inserted in the sleeve 33, and when an external force is applied, it can be displaced in the axial direction of the sleeve 33, that is, in the vertical direction in FIG. Also, the operating shaft 3
6 has its upper end inserted into the mover 35, and its lower end abuts the ball valve 32. Therefore,
When the mover 35 receives only the biasing force of the spring 37 and presses the actuating shaft 36 downward in the figure, the ball valve 32 is seated on the valve seat 31b by the biasing force, and the oil passage 21
Is cut off from the oil passage 22.

On the other hand, when an external force against the biasing force of the spring 37 is applied to the mover 35 and the mover 35 is displaced upward in the figure, the pressing of the ball valve 32 by the actuating shaft 36 is released, and as a result, The ball valve 32 is placed in a state where it can be separated from the valve seat 32b, and the oil passage 21 and the oil passage 22 are brought into conduction. The electromagnetic coil module 50 includes the valve mechanisms 30, 4
It is a module that integrally includes electromagnetic coils 51 and 52 surrounding the outer periphery of 0. 2A and 2B are a plan view and a front sectional view of the electromagnetic coil module 50, respectively. Hereinafter, the configuration of the electromagnetic coil module 50 will be described with reference to FIG. 2 together with FIG. 1.

The electromagnetic coil module 50 is constructed by integrally molding the electromagnetic coils 51 and 52 and the power distribution terminal 53 including a terminal group connected to the electromagnetic coils 51 and 52 with resin. Here, in the module main body 54 formed of resin, circular through holes 54a and 54b and rectangular through holes 54c and 54d are provided in order to secure an assembling space for the valve mechanisms 30 and 40 and the yokes 60 and 70. And are provided.

In addition to these through holes 54a to 54d, the module main body 54 has bolt holes 54 for enabling the housing 20 to be fixed with bolts 55.
e, recesses 54f to 5 for accommodating packings 56a to 56d arranged to secure the waterproofness of the electromagnetic valve device 10.
4i and claws 54j, 54 for hooking the cover 80
k, etc. are provided.

The module body 54 is fixed to the housing 20 with the packings 56a and 56b housed in the recesses 54f and 54g as shown in FIG.
The cover 80 is hooked by the claws 54j and 54k with the packings 56c and 56d stored in the h and 54i. Therefore, in the state shown in FIG. 1, proper sealing properties are ensured between the housing 20 and the module body 54 and between the module body 54 and the cover 80, and the solenoid valve device 10 as a whole. As a result, good waterproofness can be obtained.

The yokes 60, 70 assembled to the electromagnetic coil module 50 as shown in FIG. 1 are composed of a pair of magnetic members 61, 62 or 71, 72 as shown in FIG. Since the yoke 70 is the same in structure as the yoke 60, only the yoke 60 will be described below. Magnetic member 6 that constitutes the yoke 60
Reference numerals 1 and 62 denote cylindrical portions 61a and 62a and a flange portion 6, respectively.
1b and 62b, and side surface portions 61c and 62c. The cylindrical portions 61a and 62a are respectively fitted and arranged at the upper end portion and the lower end portion of the through hole 54a of the electromagnetic coil module 50.

Further, the side surface portions 61c and 62c are provided with through holes 5
4c are arranged so that the ends of them abut each other.
Then, the magnetic members 61, 62 have the flange portion 6 at that time.
1b and 62b are designed to be arranged along the upper surface or the lower surface of the module main body 54. Therefore, when the magnetic members 61 and 62 are assembled to the electromagnetic coil module 50, a predetermined space is secured on the inner peripheral side of the electromagnetic coil 51 as shown in FIG. The end face and a part of the outer peripheral surface (the outer peripheral surface on the left side of the electromagnetic coil 51 in FIG. 1) are surrounded by the yoke 60.

By the way, the cylindrical portion 61 of the magnetic bodies 61, 62
The dimensions a and 62a are set so that a predetermined space is secured between them when assembled as shown in FIG. 1, and when the sleeve 33 is inserted therein, The dimensions of the respective portions are set so that the portion 61a surrounds the outer circumference of the stator 34 and the cylindrical portion 62a surrounds the outer circumference of the mover 35.

Therefore, when the state shown in FIG. 1 is formed, the magnetic member 61, the magnetic member 62, the stator 34, the magnetic body such as the mover 35, and the like, and the stator 34 are formed on the inner and outer circumferences of the electromagnetic coil 51. A magnetic circuit is formed by a gap formed between the movable element 35 and the movable element 35, and the magnetic flux that circulates around the inner and outer circumferences of the electromagnetic coil 51 circulates in the magnetic circuit.

In this case, the magnetic circuit formed around the electromagnetic coil 51 has a gap that is required to exist in order to exert an electromagnetic attraction force on the mover 35, that is, the stator 3.
Most of the portion except the gap formed between the movable element 35 and the movable element 35 is composed of a magnetic material having a small magnetic resistance. Therefore, in the electromagnetic valve device 10, a sufficient amount of magnetic flux with respect to the strength of the magnetic field generated by the electromagnetic coil 51 can be circulated in the mover 35, and the oil passages 21 and 22 can be electrically connected / conducted with low power consumption. It is possible to generate the electromagnetic attractive force required to switch the interruption.

Therefore, in the present embodiment, when an appropriate current is supplied to the electromagnetic coil 51, an external force for displacing the mover 35 upward in FIG. 1 is generated against the biasing force of the spring 33. The ball valve 32 is controlled to be in the open state when the current is applied, and the ball valve 32 is in the closed state when the current is cut off. It should be noted that, around the valve mechanism 40, the yoke 70 constitutes a magnetic circuit surrounding the inner and outer circumferences of the electromagnetic coil 52, so that the valve mechanism 30 is
It is possible to achieve the same power saving characteristics as in the case of.

By the way, in the structure in which the yokes 60, 70 are divided into two as described above, the pair of magnetic members 61, 62 and 71, 72 constituting them are maintained in proper contact with each other at their ends. It's important to. Therefore, in the present embodiment, the washers 63 and 73 are press-fitted into the valve mechanisms 30 and 40 from the upper portions of the yokes 60 and 70, respectively, so that the space between the magnetic members 61 and 62 and the magnetic member 71,
An appropriate pressing force is applied between 72. In this case, the yokes 60 and 70 will not be in a divided state after assembly, and the magnetic circuit will always be kept in a good state.

By the way, the solenoid valve device 10 of this embodiment is
As described above, the magnetic circuit formed by surrounding the outer circumferences of the electromagnetic coils 51 and 52 can be realized with excellent assembling property. That is, in the electromagnetic valve device 10, the yokes 60 and 70 forming the magnetic circuit around the electromagnetic coils 51 and 52 are the electromagnetic coils 5 as described above.
A pair of magnetic members 61, 6 which can be divided in the axial direction of 1, 52
2 or 71, 72.

Therefore, in the process of assembling the solenoid valve device 10, first, the magnetic members 62 and 72 are fitted to the outer peripheries of the valve mechanisms 30 and 40 as shown in FIG.
If the module main body 54 is fixed to the housing 20 and the washers 63, 73, the cover 80, etc. are assembled in this order as shown in FIG. 3, all the assembling is performed only by an extremely simple work in which the assembling direction is limited to the vertical direction. be able to.

In this case, when the worker manually assembles the work, the work is extremely easy, and the assembly direction is limited to the vertical direction, so that the assembly can be easily automated. You can get the benefit of being. In this sense, the solenoid valve device 10 of the present embodiment has a remarkably excellent effect in terms of assemblability as compared with a solenoid valve device that does not take such consideration.

By the way, in the present embodiment, all of the above-mentioned magnetic members 61, 62, 71, 72 are made of the same component. That is, in the sense that the yokes 60 and 70 have good assembling ability, it is sufficient that the magnetic members 61 and 62 and 71 and 72 are separate parts that can be divided, respectively, and they are not necessarily the same parts. .

However, the solenoid valve device 10 of this embodiment
When the magnetic members 61, 62, 71, 72 are made the same part as described above, the assembling properties of the yokes 60, 70 are improved, and the following advantages can be obtained. That is,
If all the magnetic members 61, 62, 71, 72 are the same component, the yokes 60, 70 can be composed of only one type of component, and the component cost can be reduced.

Further, the magnetic members 61 and 6 forming a pair, respectively.
When 2 and 71, 72 are the same part, good engagement can be obtained at the contact portion without any special design considerations. Therefore, good adhesion can be obtained at the abutting portions of the magnetic members 61, 62 and 71, 72, and a low magnetic resistance can be easily and reliably realized in the yokes 60, 70.

Since such good engagement can be appropriately maintained even when the mold for molding the magnetic members 61, 62, 71, 72 is worn, it is easy to ensure quality during mass production. In this sense, the solenoid valve device 10 of this embodiment has excellent effects in terms of cost reduction, quality stabilization, and the like. Although the embodiment in which the yokes 60 and 70 are divided into two has been described above, the yokes 60 and 70 are not necessarily limited to be divided into two, and may be divided into three or more as long as they are divided in the axial direction. However, it can be applied.

Further, the solenoid valve device 10 described above has a structure having a plurality of valve mechanisms 30 and 40 on the housing 20, but the application of the present invention is not limited to this, and a single valve mechanism is used. However, the application is possible even when the number is 3 or more.

[0036]

As described above, according to the present invention, a desired magnetic circuit surrounding the inner and outer circumferences of the electromagnetic coil can be realized only by inserting magnetic members each having a predetermined shape axially from both sides of the electromagnetic coil. be able to. Therefore, according to the present invention, it is possible to realize an electromagnetic valve device that can achieve both power saving and securing of a large electromagnetic attraction force with a small number of parts and only by an extremely simple assembly work.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing the overall configuration of a solenoid valve device that is an embodiment of the present invention.

FIG. 2A is a plan view of an electromagnetic coil module used in the electromagnetic valve device of this embodiment. FIG. 2B is a front sectional view of an electromagnetic coil module used in the electromagnetic valve device of this embodiment.

FIG. 3 is a perspective view of a yoke used in the solenoid valve device of this embodiment.

FIG. 4A is a diagram showing a state in which a part of a yoke is assembled in the solenoid valve device according to the present embodiment. FIG.
(B) is a diagram showing a state in which the electromagnetic coil module is assembled on a part of the yoke in the electromagnetic valve device of the present embodiment.

[Explanation of symbols]

 10 electromagnetic valve device 20 housing 30,40 valve mechanism 50 electromagnetic coil module 51,52 electromagnetic coil 54 module body 60,70 yoke 61,62,71,72 magnetic member 61a, 62a cylindrical portion 61b, 62b flange portion 61c, 62c side surface Part 80 cover

Claims (1)

[Claims] 1. An inner peripheral side of the electromagnetic coil is provided with a mover that generates an electromagnetic attractive force according to the amount of flowing magnetic flux and is displaced by using the electromagnetic attractive force as a drive source. In the electromagnetic valve device including a yoke provided around the inner peripheral surface, the end surface, and the outer peripheral surface of the electromagnetic coil, the yoke is dividable in the axial direction of the electromagnetic coil. An electromagnetic valve device comprising a plurality of magnetic members, which when combined form a predetermined shape surrounding the electromagnetic coil.