JPH0742863A - Solenoid valve device - Google Patents

Abstract

PURPOSE:To enhance the close tightness of a magnetic circuit to provide a stable magnetic characteristic and to reduce the number of part items of a solenoid valve device by preventing a yoke from rattling while avoiding application of excess load to the yoke, the solenoid valve device having a housing which comprises a guide cylinder surrounded by a bobbin on which a coil is wound and having an end joined to a valve housing and is fitted into a base, with both end portions of the guide cylinder magnetically coupled to each other by the yoke. CONSTITUTION:The end of a guide cylinder 50 is provided in connection with a valve housing 60 via a stepped portion 15a which is almost flush with one side 20a of a base 20, the valve housing 60 being fitted into a fitting recessed portion 210 provided on the side 20a of the base 20, and a rigid retaining plate 36 made of a magnetic metal is engaged in the stepped portion 15a and tightened to the side 20a, and a yoke 14 which sandwiches between it and the retaining plate 36 a bobbin 12 surrounding the guide cylinder 50 projecting from the retaining plate 36 and to which the end portion of the guide cylinder 50 is fitted is tightened to the retaining plate 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing in which a base end of a cylindrical guide cylinder having a non-magnetic portion in an intermediate portion is continuously connected to a valve housing, and a guide cylinder in an axial direction. A fixed core fixed to one side, a movable core housed in a guide cylinder by being biased by a spring in a direction away from the fixed core, and a movable seat that can be seated on a valve seat provided in the valve housing. A valve body connected to the core; a coil wound around a bobbin surrounding the guide cylinder; and a yoke that covers at least a part of the coil and magnetically couples both ends of the guide cylinder, The present invention relates to a solenoid valve device in which a valve housing is fitted to a base body.

[0002]

2. Description of the Related Art Conventionally, such a device is disclosed in Japanese Patent Publication No.
It is already known from the publication of No. 38466.

[0003]

SUMMARY OF THE INVENTION In the above conventional one,
The housing of each solenoid valve is sandwiched between a base and a pressing plate fastened to the base, and a yoke surrounding the coil of each solenoid valve is also arranged between the base and the pressing plate. However, in order to secure the fixing of each housing to the base, the tightening force of the pressing plate to the base must be relatively large, and at that time, the yoke between the pressing plate and the base is excessively tightened. Since the magnetic force of the yoke may be adversely affected when the applied force acts, the length of the yoke is set so that an excessive tightening force does not act on the yoke. Therefore, the yoke may rattle in the axial direction between the base and the pressing plate, which causes a problem in the adhesion of the magnetic circuit.

The present invention has been made in view of the above circumstances, and prevents rattling of the yoke while avoiding an excessive load on the yoke to improve the adhesion of the magnetic circuit. It is an object of the present invention to provide a solenoid valve device that has stable magnetic characteristics and has a reduced number of parts.

[0005]

To achieve the above object, according to the present invention, a base end of a cylindrical guide cylinder having a non-magnetic portion in an intermediate portion is connected to a valve housing. Provided in the valve housing, a fixed core fixed to either one of the axial sides of the guide cylinder, a movable core that is spring-biased in a direction away from the fixed core, and is housed in the guide cylinder. A valve body continuously connected to the movable core so as to be seated on the valve seat, a coil wound around a bobbin surrounding the guide cylinder, and both ends of the guide cylinder covering at least a part of the coil. In a solenoid valve device including a magnetically coupled yoke and a valve housing fitted to a base body, the housing has a valve housing fitted to a fitting recess provided on one surface of the base body, and the one surface of the base body. Through a step that is almost flush with Become the proximal end of the guide tube is continuously provided,
A pressing plate formed of a magnetic metal having rigidity and having an insertion hole through which the guide tube is inserted is engaged with the step portion and fastened to the one surface of the base body, and surrounds the guide tube protruding from the pressing plate. A coil is wound around the bobbin, and a yoke having a hole for sandwiching the bobbin between the bobbin and the pressing plate and having a tip end portion of the guide cylinder fitted therein is fastened to the pressing plate.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view of a normally open solenoid valve device according to a first embodiment of the present invention.

This normally open solenoid valve device V_OIs a cylinder with a bottom
Guide tube 5_OThe base end of the valve housing 6_OIs connected to
Consisting of housing 7_OAnd the guide tube 5_OFixed on the proximal side of
Fixed core 8_OAnd the fixed core 8_OAway from
Spring-biased guide tube 5_OMovable core 9 stored inside
And valve housing 7_OSeated on the valve seat 10
A valve body 11 connected to the movable core 9 as possible, and a guide
Tube 5_OCoil 13 wound around bobbin 12 surrounding
And a part of the coil 13 to cover the guide tube 5 _OBoth
A yoke 14 for magnetically coupling the ends.

Valve housing 6_OIs made of magnetic metal
The bottom cylinder 15 and a part of the bottom cylinder 15 are fitted.
Main valve housing 16_OComposed of crimped joints
The outer surface is formed into a stepped cylindrical shape.
Has been. Moreover, the valve housing main body 16_OAnd bottomed circle
A valve chamber 17 is formed between the cylinders 15. In addition, the guide tube 5
_OIs integrally provided on the bottomed cylindrical body 15 via the step 15a.
The formed cylindrical portion 15b is formed into a cylindrical shape by using a non-magnetic material.
A bottomed circle made of magnetic metal through the non-magnetic portion 18
The tubular portion 19 is coaxially arranged in series. According to
Housing 7 _OIs the valve housing 6_OStep 15a
Through the guide tube 5_OThe base end of is connected coaxially.
become.

The valve housing 6 _O is a metal base 2
The base 20 is provided with a fitting recess 21 _O on one surface 20 a thereof. Thus the valve housing 6
_{The O} is fitted into the fitting recess 21 _O such that the step 15a is substantially flush with the one surface 20a of the base body 20. This fitting recess 21 _O is a bottomed cylindrical body 1 of the valve housing 6 _O.
Large diameter part 21 _OA for fitting 5 and valve housing main body 16
A small-diameter portion 21 _OB into which _O is fitted is provided coaxially with a step, and an annular seal member elastically contacts the inner surface of the large-diameter portion 21 _{OA on} the outer surface of the bottomed cylindrical body 15. 22
Is mounted and an annular filter 23 is mounted between the inner surface of the large diameter portion 21 _{OA and} the outer surface of the valve housing main body 16 _{O so} as to elastically contact the outer surface of the small diameter portion 21 _OB . The seal member 24 _O is attached.

On the other hand, the base body 20 is provided with a passage 25 which opens at a position eccentric to the inner end closing portion of the fitting recess 21 _O and a passage 26 which communicates with the valve chamber 17 via the filter 23.

The valve housing main body 16 _O has a valve chamber 1
7. A cylindrical valve seat member 28 having a tapered valve seat 10 facing the valve seat 7 and a valve hole 27 opening at the center of the valve seat 10.
And a throttle member 29 communicating with the valve hole 27 are fitted and fixed, and a filter 30 _O interposed between the throttle member 29 and the passage 25 is mounted.

The fixed core 8 _O is fitted and fixed to the end of the guide cylinder 5 _{O on} the valve housing 6 _O side. A bearing member 31 is sandwiched between the bottomed cylindrical body 15 and the valve housing main body 16 _O in the valve chamber 17, and a bearing member 32 is fitted and fixed to the tip end side of the guide cylinder 5 _O, that is, the bottomed cylindrical portion 19. To be done. The movable core 9 faces the fixed core 8 _O and is accommodated in the guide cylinder 5 _O so as to be movable in the axial direction. The movable core 9
The rod 33 _O both ends of the fixed core 8 _O and axially movably penetrates coaxially and is slidably supported by the bearing members 31 and 32 are coaxially fixed, the fixed core 8 _O and the movable core A spring 34 surrounding the rod 33 _O is contracted between 9 and the spring 34 biases the movable core 9 in a direction away from the fixed core 8 _O. A hemispherical valve element 11 that can be seated on the valve seat 10 is provided at one end of the rod 33 _O in the valve chamber 17. Moreover, the movable core 9 is provided with a through hole 35 that allows the working fluid to flow therethrough over the entire axial length.

By the way, the valve housing 6 _O is fitted into the fitting recess 2
The housing 7 _O fitted to 1 _O is the pressing plate 3
By fixing 6 to one surface 20a of the base body 20, it is fixed to the base body 20. The pressing plate 36 is formed of a rigid magnetic metal into a rectangular flat plate shape, and one surface 20 of the base 20 is fixed by a bolt (not shown).
It is fastened to a. Moreover, the guide tube 5 is attached to the pressing plate 36.
An insertion hole 37 through which the _O is inserted is provided, and the pressing plate 36 through which the guide cylinder 5 _O is inserted into the insertion hole 37 is engaged with the step portion 15a of the housing 7 _O and fastened to the one surface 20a of the base body 20. housing 7 _O is fixed to the base 20 by Rukoto, guide tube 5 _O of the housing 7 _O in the state protruded from the holding plate 36.

The bobbin 12 is a pressing plate 3 for the guide cylinder 5 _O.
6 is formed of synthetic resin in a cylindrical shape surrounding the protruding portion from 6, and the coil 1 is provided on the outer periphery of the bobbin 12.
3 is wound.

The yoke 14 has an abutting plate portion 14a that abuts the bobbin 12 of each of the normally open solenoid valve devices V _{O to} V _{ORL on} the side opposite to the pressing plate 36, and one end at the outer edge of the corresponding abutting plate portion 14a. And a support plate portion 14b in which
At the other end of b, there is a mounting plate portion 14c that is connected to the contact plate portion 14a at a right angle so as to extend to the side opposite to the contact plate portion 14a and is formed of magnetic metal. The mounting plate portion 14c is formed by a screw member 38. It is fastened to the pressing plate 36. Thus, when the yoke 14 is attached to the pressing plate 36, the bobbin 12 is sandwiched between the pressing plate 36 and the abutting plate portion 14a of the yoke 14.

Moreover, the abutting plate portion 14a of the yoke 14 is
A hole 39 into which the tip portion of the guide cylinder 5 _O is fitted is provided, and a notch 40 continuous with the hole 39 is provided. In the notch 40, the bobbin 12 is connected to the coil 13 in series.
A pair of connection terminals 41 ...

Next, the operation of the first embodiment will be described. In this normally open solenoid valve device V _O , the coil 13 is excited to excite the fixed core 8 _O to the cylindrical portion 15 of the guide cylinder 5 _O.
b, the pressing plate 36, the yoke 14, the bottomed cylindrical portion 19 of the guide cylinder 5 _O and the movable core 9 generate a magnetic flux that reaches the fixed core 8 _O , and the movable core 9 is attracted to the fixed core 8 _O side. The valve body 11 is seated on the valve seat 10 to close the valve hole 27.

In the housing 7 _O of the normally open solenoid valve device V _O , the fixed core 8 _O is fixed and the movable core 9 is housed.
_The pressing plate 36 fitted to the _O and assembled with the coil 13 and the yoke 14 wound around the bobbin 12 is
The guide cylinder 5 _O of the housing 7 _O is inserted into the bobbin 12 by being attached to the one surface 20 a. Therefore, the housing 7 _O containing the actuating element that operates mechanically is used as the base 2
The performance check and the sealability check of the actuating element can be performed in the state of being assembled to 0. Bobbin 1
By assembling the coil 13 wound around 2 on the yoke 14, the performance check of the portion including the electric elements can be performed in a state of being separated from the housing 7 _O.
The efficiency of performance checking is improved, quality control is facilitated, and assembly workability is further improved.

Further pressing plate 36, which also performs the function of fixing the housing 7 _O to the base 20, contributes to a reduction in the number of parts because a dedicated part for fixing the housing 7 _O in the base body 20 is not required can do.

Further, the yoke 14 sandwiches the bobbin 12 around which the coil 13 is wound with the pressing plate 36, and the pressing plate 36 engages with the stepped portion 15a of each housing 7 _O , and the guide cylinder 5 _O. The tip portion is fitted in the hole 39 of the yoke 14. Therefore, the coil 14 is arranged along the axial direction of the yoke 14 while avoiding an excessive load acting on the yoke 14 which covers a part of the coil 13 and magnetically couples the base end portion and the tip end portion of the guide cylinder 5 _O. You can prevent the rattling,
It is possible to stabilize the magnetic characteristics.

FIG. 2 shows a normally-closed solenoid valve device according to a second embodiment of the present invention, in which parts corresponding to those of the first embodiment are designated by the same reference numerals.

This normally closed solenoid valve device V_CIs a cylinder with a bottom
Guide tube 5_CThe base end of the valve housing 6_CIs connected to
Consisting of housing 7_CAnd the guide tube 5_CFixed on the proximal side of
Fixed core 8_CAnd the fixed core 8_CAway from
Spring-biased guide tube 5_CMovable core 9 stored inside
And valve housing 7_CSeated on the valve seat 10
A valve body 11 connected to the movable core 9 as possible, and a guide
Tube 5_CCoil 13 wound around bobbin 12 surrounding
And a part of the coil 13 to cover the guide tube 5 _CBoth
A yoke 14 for magnetically coupling the ends.

The valve housing 6 _C includes a cylindrical body 15 having a bottom,
A valve housing main body 16 _C , a part of which is fitted into the bottomed cylindrical body 15, is caulked and connected,
The outer surface shape is formed into a stepped cylindrical shape. In addition, the guide cylinder 5 _C is a cylindrical portion 15 provided on the bottomed cylindrical body 15.
In b, a non-magnetic portion 1 formed of a non-magnetic material in a cylindrical shape
8 through the fixed core 8 _C are those formed by continuously provided, the housing 7 _C is stepped portion 15a in the valve housing 6 _C
The base end of the guide cylinder 5 _C is coaxially connected continuously via the.

The valve housing 6 _C has one surface 20 of the base body 20.
into the mating recess 21 _C provided in a, the step portion 15a is fitted so as to be substantially flush with the one surface 20a of the base 20, the fitting recess 21 _C is a bottom of the valve housing 6 _C A large diameter portion 21 _CA into which the cylindrical body 15 is fitted and a small diameter portion 21 _CB into which the valve housing main body 16 _C is fitted are provided coaxially with a step. The large diameter portion 2 is provided on the outer surface of the bottomed cylindrical body 15.
An annular seal member 22 that elastically contacts the inner surface of the _CA 1 is mounted, and a valve chamber 17 formed between the bottomed cylindrical body 15 and the valve housing main body 16c and a passage 42 provided in the base body 20 are provided. An annular filter 23 interposed between
An annular seal member 24 _C that elastically contacts the outer surface of the small diameter portion 21 _CB is mounted on the outer surface of the valve housing main body 16 _C.

The valve housing main body 16 _C has a valve seat 10 facing the valve chamber 17 and a valve seat member 28 having a valve hole 27.
The filter 3 is fitted and fixed to the throttle member 29 communicating with the valve hole 27, and is interposed between the throttle member 29 and the passage 43 provided eccentrically at the closed end of the fitting recess 21 _C.
0 _C is installed.

The movable core 9 having the through hole 35 is housed in the guide cylinder 5 _{C so} as to be opposed to the fixed core 8 _{C so as} to be movable in the axial direction. One end of the movable core 9 is the fixed core 8 _C. It is movably supported in the axial direction, and the other end is the bearing member 3.
1, a rod 33 _C supported axially movably is fixed coaxially, and a spring 34 surrounding the rod 33 _C is contracted between the fixed core 8 _C and the movable core 9. This spring 34
As a result, the movable core 9 is spring-biased in the direction away from the fixed core 8 _C , and the valve seat 10 is attached to the rod 33 _C in the valve chamber 17.
A hemispherical valve body 11 that can be seated on is provided.

Such a normally closed solenoid valve device V_CThe house of
Ring 7_CIs the normally open solenoid valve device V_OHousing 7
_OSimilarly to the above, the pressing plate 36 is attached to the one surface 20a of the base 20.
It is fixed to the base body 20 by tightening to
Housing 7_CGuide tube 5 _CProtrudes from the holding plate 36
To be done.

The bobbin 12 surrounding the protruding portion of the guide cylinder 5 _{C from} the pressing plate 36 is fixed to the pressing plate 3 by the yoke 14.
Assembled to 6. That is, the bobbin 12 is sandwiched between the abutment plate portion 14a of the yoke 14 which is fastened to the pressing plate 36 and the pressing plate 36, and the coil 13 is wound around the bobbin 12.

Such a normally closed solenoid valve device V_CThen
By exciting the coil 13, the fixed core 8 _CFrom york 1
4, pressing plate 36, guide tube 5_CCylindrical portion 15b of
Fixed core 8 through movable core 9_CMagnetic flux is generated to move
Core 9 is fixed core 8_CBy being sucked to the side, the valve body
11 should move away from the valve seat 10 and open the valve hole 27.
It

This normally closed solenoid valve device V_CAlso on
The normally open solenoid valve device V of the first embodiment _OSimilar to
And the quality control is easy.
Not only improves assembly workability, but also
The number of magnets can be reduced, and the yoke 14
The shaft of the yoke 14 while avoiding the application of a large load
The rattling along the direction can be prevented, and the magnetic characteristics are low.
It can be standardized.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. It is possible to do.

[0033]

As described above, according to the present invention, the housing has the step portion which is substantially flush with the one surface of the base body in the valve housing fitted in the fitting recess provided on the one surface of the base body. The base end of the guide cylinder is continuously provided via the guide cylinder, and a pressing plate formed of a magnetic metal having rigidity and having an insertion hole for inserting the guide cylinder is engaged with the step portion and is attached to the one surface of the base body. A coil is wound around a bobbin that is fastened and surrounds a guide cylinder that protrudes from the pressing plate, and the yoke that holds the bobbin between it and the pressing plate and that has a hole into which the tip end of the guide cylinder fits Since it is fastened to the plate, it is possible to prevent rattling of the yoke while avoiding an excessive load on the yoke, improve the adhesion of the magnetic circuit, and obtain stable magnetic characteristics. , Fix the housing to the base with the pressing plate It can contribute to a reduction in parts count by.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a normally open solenoid valve device according to a first embodiment.

FIG. 2 is a vertical sectional view of a normally closed solenoid valve device according to a second embodiment.

[Explanation of symbols]

5 _C , 5 _O ... Guide cylinder 6 _C , 6 _O ... Valve housing 7 _C , 7 _O ... Housing 8 _C , 8 _O ... Fixed core 9 ... Movable core 10 ... Valve seat 11 ... valve body 12 ... bobbin 13 ... coil 14 ... yokes 15a ... step 18 ... nonmagnetic portion 20 ... base 20a ... one surface 21 _C, 21 _O・ ・ ・ Mating recess 36 ・ ・ ・ Pressing plate 37 ・ ・ ・ Insertion hole 39 ・ ・ ・ Hole V _C・ ・ ・ Normally closed solenoid valve device V _O・ ・ ・ Normally opened solenoid valve device

Claims (1)

[Claims] 1. A cylinder having a non-magnetic portion (18) in an intermediate portion.
Guide tube (5_O, 5_C) Is the valve howe
Jing (6_O, 6_C) And a housing (7
_O, 7_C) And a guide tube (5_O, 5_C) Axial direction
Fixed core (8_O, 8_C) And fixed
Core (8_O, 8_C) Spring biased in the direction away from
Guide tube (5_O, 5_C) Movable core (9)
And the valve housing (6_O, 6_C) Valve seat
It can be seated on (10) and is connected to the movable core (9).
Valve body (11) and guide tube (5_O, 5_C)
A coil (13) wound around a bobbin (12)
The guide tube covering at least a part of the ill (13)
(5_O, 5_C) Yoke (1) that magnetically couples both ends of
4) and a valve housing (6_O, 6_C) Is the base (2
In the solenoid valve device fitted to (0), the housing (7
_O, 7_C) Is provided on one surface (20a) of the base body (20).
Mating recess (21_O, 21_C) Fitted with a valve housing
(6_O, 6_C) On one surface (20
Guide tube through step (15a) which is almost flush with a)
(5_O, 5_C) Is connected to the base end of the guide tube (5
_O, 5 _C) Has an insertion hole (37) through which the rigidity is increased.
The pressing plate (36) made of magnetic metal has
The one surface of the base body (20) engaging with the step portion (15a)
It was fastened to (20a) and protruded from the pressing plate (36).
Guide tube (5_O, 5_C) To the bobbin (12) surrounding
The bobbin (12) is pressed down by winding the il (13)
It is sandwiched between the plate (36) and the guide tube (5_O，
5_C) Having a hole (39) into which the tip of
(14) is characterized by being fastened to the pressing plate (36).
And solenoid valve device.