JP2001187979A - Solenoid valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solenoid valve miniaturizable without reducing the attracting force and preventing the leakage of a fluid to the outside of a nonmagnetic member. SOLUTION: The inside cylindrical part 11a of a yoke 11 covers the outside surface of a movable element 21. The inside cylindrical part 1a of the yoke 11 and the attraction part 12a of a fixed core 12 are opposed through a clearance 19 of a prescribed length formed in the reciprocating direction of a movable member 20. The nonmagnetic member 25 is arranged on the inside of the yoke 11 and the fixed core 12 to reciprocatingly support the movable element 21. The nonmagnetic member 25 covers one reciprocating-directional end of the movable element 21 and also covers the clearance 19 formed between the attraction part 12a of the fixed core 12 and the inside cylindrical part 11a of the yoke 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve for supporting a mover in a reciprocating manner.

[0002]

2. Description of the Related Art JP-A-10-38126, DE1
As disclosed in US Pat. No. 9,504,185 A1 and Japanese Patent Application Laid-Open No. H11-118062, the valve member reciprocates together with the movable element of the electromagnetic drive unit to control the flow rate of the fluid flowing through the fluid flow path, that is, to open and close the flow path. There have been known various types of solenoid valves that hold a valve member together with a mover at an intermediate position and increase or decrease the fluid flow rate according to the position of the valve member. DE19
In a solenoid valve disclosed in 504185A1 and Japanese Patent Application Laid-Open No. H11-118062, a shaft attached to a mover is supported. JP-A-10-38126
In the solenoid valve disclosed in Japanese Patent Application Laid-Open Publication No. H11-260, the mover itself is supported so as to be able to reciprocate.

[0003]

With respect to the air gap between the movable portion and the cylindrical portion of the stator, which forms a magnetic circuit together with the movable portion and covers the outer peripheral side surface of the movable portion, the movable portion and the cylindrical portion are different from each other. It is desirable to reduce as much as possible in a range where the contact is not made in order to increase the attraction force of the mover. However, DE195
In a solenoid valve disclosed in Japanese Patent Application Laid-Open No. 04185A1 and Japanese Patent Application Laid-Open No. H11-118062, a shaft attached to a mover is supported. Since the support member supporting the shaft and the tubular portion of the stator are separate members, when the support member and the tubular portion are misaligned, the tubular portion covering the outer peripheral side surface of the mover comes into contact with the movable member. Might be. Therefore, it is necessary to increase the inner diameter of the cylindrical portion so that the cylindrical portion of the stator does not come into contact with the mover even when the misalignment occurs.

When the inner diameter of the cylindrical portion of the stator increases, the air gap between the cylindrical portion and the mover increases, so that the force for attracting the mover decreases and the diameter of the electromagnetic drive increases. It is conceivable to increase the number of turns of the coil in order to maintain the force for attracting the mover. However, if the number of turns of the coil is increased, the size of the electromagnetic drive unit increases.

In the solenoid valve disclosed in Japanese Patent Application Laid-Open No. H10-38126, a holding sleeve made of a non-magnetic metal is disposed between a cylindrical portion of a stator and a mover, and the holding sleeve is a mover. I support. The valve member is supported by the valve member sleeve. Since the mover and the valve member are formed separately, there is no misalignment between the stator and the mover even if the valve member is supported. Therefore, it is not necessary to increase the inner diameter of the cylindrical portion of the stator in order to absorb the misalignment. Further, by reducing the thickness of the holding sleeve, the air gap formed between the cylindrical portion of the stator and the mover can be reduced.

In the solenoid valve disclosed in Japanese Patent Application Laid-Open No. 10-38126, an elastic deformation portion, which is an end of a cup-shaped holding sleeve, applies an elastic force to the tip of an inner peripheral portion of a plate, which is a stator. In addition, it is in contact. However, the contact caused by this elastic force causes the fluid leaking from the valve member side to the mover side to move out of the holding sleeve through the gap formed between the suction portion of the stator for sucking the mover and the cylindrical portion. For example, this is not to prevent leakage to the coil side. Therefore, fluid leaking from the valve member side may leak to the outside of the holding sleeve. An object of the present invention is to provide an electromagnetic valve that can be miniaturized without reducing the suction force and that prevents fluid from leaking outside the non-magnetic member.

[0007]

According to the solenoid valve of the first aspect of the present invention, the non-magnetic member disposed on the inner periphery of the stator supports the movable element reciprocally. Since misalignment between the cylindrical portion of the stator and the mover can be prevented, the inner diameter of the cylindrical portion of the stator can be made as small as possible in accordance with the outer diameter of the mover. Therefore, it is possible to reduce the size of the solenoid valve without reducing the suction force.

Further, a non-magnetic member is formed in a cup shape to cover one end of the mover in the reciprocating direction and to extend to the suction portion to cover a gap formed between the cylindrical portion and the suction portion. . Therefore, even if the fluid leaks to the mover side, the fluid is prevented from leaking to the outside of the non-magnetic member.

According to the solenoid valve of the second aspect of the present invention,
Since the non-magnetic member has the flange, the non-magnetic member can be easily assembled by, for example, sandwiching the flange. According to the solenoid valve according to claim 3 or 20 of the present invention, since the movable element is provided with the concave portion in the sliding portion between the movable element and the non-magnetic member, foreign matter that has entered the sliding section between the movable element and the non-magnetic member can be prevented. It is housed in the recess. Since foreign matter that has entered the sliding portion between the mover and the non-magnetic member does not hinder the reciprocating movement of the mover, the resistance of the mover sliding with the non-magnetic member is reduced.

According to the solenoid valve of the present invention, an escape passage communicating with the space located on both sides in the reciprocating movement of the mover is provided in the mover. Since the fluid circulates in the escape passage with the reciprocating movement of the mover, the reciprocating movement of the mover is not hindered. Claim 5 or 2 of the present invention
According to the solenoid valve of the third aspect, by coating the sliding portion of the mover sliding on the non-magnetic member, the resistance of the mover sliding on the non-magnetic member is reduced.

According to the solenoid valve of the present invention, the bottomed cylindrical cup-shaped member formed of a thin non-magnetic member moves the mover in the axial direction. It has a tubular part that supports it. Since it is easy to attach the cylindrical portion of the cup-shaped member to the inner peripheral wall of the stator without misalignment, misalignment between the inner peripheral wall of the stator and the mover can be prevented. Since the inner diameter of the stator can be made as small as possible in accordance with the outer diameter of the mover, the size of the solenoid valve can be reduced without reducing the suction force. In addition, the cup-shaped member has a connecting portion that is connected to the housing in a liquid-tight manner, and covers the opening of the housing. Therefore, it is possible to prevent the fluid in the housing from leaking outside the cup-shaped member.

[0012] According to the solenoid valve according to claim 7 of the present invention,
By fastening the flange portion of the housing and the flange portion of the cup-shaped member, if a seal member is interposed between the flange portions, the housing and the cup-shaped member can be easily sealed. According to the solenoid valve of the eleventh aspect of the present invention, since the second stator is disposed inside the cup-shaped member, the space between the housing and the second stator, and between the second stator and the cup-shaped member are provided. Need to be sealed. Second
Since the flange portion of the stator is disposed between the flange portion of the cup-shaped member and the flange portion of the housing, if a seal member is interposed between flange portions adjacent in the axial direction,
It is possible to easily seal the housing and the second stator, and between the second stator and the cup-shaped member.

According to the solenoid valve of the twelfth aspect of the present invention, the plurality of flange portions can be easily fastened in the axial direction by caulking the caulked portion of the first stator. According to the solenoid valve according to claim 14 or 16 of the present invention, the valve member is the second valve.
By contacting the contact portion of the stator, the movement of the valve member in one movement direction is restricted. Since the displacement of the valve member is determined from the contact portion, the displacement of the valve member can be controlled with high accuracy.

According to the solenoid valve of the present invention, since the contact portion is a non-magnetic member, even if the valve member is formed of a magnetic material, the non-magnetic member is interposed between the contact portion and the valve member. You don't have to. Therefore, the number of parts is reduced and the number of assembling steps is reduced. According to the solenoid valve of the present invention, the movable member can move in the axial direction by a predetermined amount when the valve member is in contact with the contact portion, so that the cup-shaped member and the housing member are connected. At this time, even if the valve member is pushed toward the mover, the force for pushing the valve member is not transmitted to the mover. Therefore, the movable element is prevented from being pressed against the bottom of the cup-shaped member by the force received from the valve member, and the deformation of the cup-shaped member is prevented.

Furthermore, even if the solenoid valve is used in an environment where vibration is applied to the valve member and the mover, only the mover collides with the bottom of the cup-shaped member. The vibration load applied to the bottom of the cup-shaped member is smaller in the case of only the mover than in the case of the vibration load of both the mover and the valve member. Therefore, the deformation of the cup-shaped member is reduced, and the product life is extended.

According to the solenoid valve of the nineteenth aspect of the present invention, since the inner cylinder and the outer cylinder of the first stator are formed by the continuous plate members, the number of parts is reduced. Therefore, the number of assembling steps is reduced. According to the solenoid valve according to the twenty-first aspect of the present invention, the convex portion collects the foreign matter that has entered the sliding portion between the mover and the cup-shaped member in the concave portion. Therefore, foreign matter that has entered the sliding portion between the mover and the cup-shaped member does not hinder the reciprocal movement of the mover. In addition, since the convex portions formed on both sides in the axial direction of the concave portion are supported by the cup-shaped member, even if the concave portion is formed, the movable element is prevented from tilting and moving.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; (First Embodiment) FIG. 1 shows a first embodiment in which the solenoid valve of the present invention is applied to a hydraulic control valve of a valve timing adjusting device for an internal combustion engine. FIG. 1 shows a state in which no current is supplied to the electromagnetic drive unit 10. Arrows A and B in FIG.
0 indicates a reciprocating movement direction.

The hydraulic control valve 1 includes an electromagnetic drive unit 10 that generates a magnetic attraction force by supplying a current, and a spool 40 as a valve member reciprocatingly moves together with the movable member 20, thereby providing a retard hydraulic chamber 65. And a spool control valve 30 as a valve for adjusting the amount of hydraulic oil supplied to the advance hydraulic chamber 67 and the amount of hydraulic oil discharged from the retard hydraulic chamber 65 and the advance hydraulic chamber 67. The yoke 11 of the electromagnetic drive unit 10 and the sleeve 31 as a housing of the spool control valve 30 are caulked and fixed.

The electromagnetic drive unit 10 includes a yoke 11 as a first stator, a fixed core 12 as a second stator, and a bobbin 1.
5, coil 16 wound on bobbin 15, movable member 20
And a non-magnetic member 25. The yoke 11 and the fixed core 12 constitute a stator. The yoke 11 is formed from one continuous plate-like member. Fixed core 1
The second flange portion 12 b and the flange portion 27 of the nonmagnetic member 25 are sandwiched between the yoke 11 and the sleeve 31. The yoke 11, the fixed core 12, and the mover 21 of the movable member 20 are formed of a magnetic material, and constitute a magnetic circuit.

The yoke 11 has an inner cylindrical portion 11a and an outer cylindrical portion 11b as described in the claims. A bobbin 15 and a coil 16 are provided between the inner cylindrical portion 11a and the outer cylindrical portion 11b. Accommodating. Inner cylinder 11a as inner cylinder
Covers the outer peripheral side surface of the mover 21 and faces the mover 21 on the radially outer side of the mover 21. The outer peripheral cylinder portion 11b as an outer cylinder passes through the outside of the coil 16 and
It is connected to 2. A caulking portion 1 is provided at the end of the outer peripheral cylindrical portion 11b.
1c is formed. The yoke 11, the bobbin 15, and the coil 16 are fixed by a resin material 17. An inner peripheral cylindrical portion 11a of the yoke 11 and a suction portion 12a of the fixed core 12 have a gap 19 having a predetermined length in the reciprocating direction of the movable member 20.
Are formed to face each other. The thickness of the suction portion 12a decreases toward the inner peripheral cylindrical portion 11a of the yoke 11.

The coil 16 has a winding end connected to a terminal 18, and a control current is supplied from the terminal 18. When the control current is supplied to the coil 16, the spool 4
The mover 21 is sucked toward the suction portion 12 a of the fixed core 12 against the urging force of the spring 50 that is in contact with the movable core 21. The urging force of the spring 50 acts in the direction of arrow B in FIG.
The magnetic force generated by supplying a current to the movable member 20 acts to attract the movable element 21 in the direction of the arrow A in FIG.

The movable member 20 includes a mover 21 and a mover 2
And a shaft 22 protruding toward the first spool 40. The outer peripheral surface of the mover 21 that slides on the inner peripheral surface of the nonmagnetic member 25 is coated with a material such as Teflon (registered trademark) in order to reduce the sliding resistance with the nonmagnetic member 25. As shown in FIGS. 2A and 2B, escape passages 23 and 24 are formed in the outer peripheral wall or inside of the mover 21 to communicate spaces on both sides of the mover 21 in the reciprocating movement direction. Thereby, the reciprocating movement of the movable member 20 is not hindered. At the end of the movable element 21 on the magnetic attraction side indicated by the arrow A in FIG. 1, a tapered section 21a whose outer diameter becomes smaller toward the attraction section 12a is formed as shown in FIG.

The non-magnetic member 25 made of a non-magnetic material such as stainless steel has a bottomed cylindrical portion 26 as a cylindrical portion and a flange portion 27 as a connecting portion, and is formed in a cup shape. The non-magnetic member 25 includes the yoke 11 and the fixed core 1.
2, that is, the yoke 11 and the fixed core 12 are arranged outside the non-magnetic member 25. The nonmagnetic member 25 covers the opening 31 a of the sleeve 31, and the bottom 26 a side of the bottomed cylindrical portion 26 covers one end of the movable member 20 in the reciprocating direction. Further, the bottomed cylindrical portion 26 is fixed core 1
The gap 19 formed between the second suction portion 12a and the inner peripheral cylindrical portion 11a of the yoke 11 is covered. Non-magnetic member 2
5 is a flange portion 12b of the fixed core 12.
And the flange portion 31b of the sleeve 31 is clamped between the sleeve 31 and the flange portion 31c of the nonmagnetic member 25 by the caulking portion 11c as a fastening means of the yoke 11. And is fluid-tightly connected to the flange portion 31b. O-ring 2
9 denotes a flange portion 27 of the non-magnetic member 25 and a sleeve 31.
Of the non-magnetic member 2
5 and the flange 31b of the sleeve 31
This prevents the hydraulic oil from leaking out between the points.

The spool control valve 30 has a sleeve 31 and a spool 40. An opening 31 a is formed on the electromagnetic drive unit 10 side of the sleeve 31 so that the shaft 22 contacts the spool 40 to apply a driving force to the spool 40 to operate the spool 40. A plurality of openings 32, 33, 34, 35, 36 are formed at predetermined wall positions of the sleeve 31 as fluid passages through which hydraulic oil passes. The pump 60 supplies the working oil sucked from the oil tank 61 to the opening 34. The openings 32 and 36 are open to the oil tank 61 via oil passages 63 and 64, respectively. The opening 33 communicates with the retard hydraulic chamber 65 via an oil passage 66, and the opening 35 communicates with the advance hydraulic chamber 67 via an oil passage 68.
Is in communication with

The spool 40 is slidably supported on the inner wall of the sleeve 31 in the axial direction. The spool 40 includes large diameter portions 41, 42, 43, and 44, which are lands having substantially the same diameter as the inner diameter of the sleeve 31, and a small diameter portion connecting these large diameter portions. The end surface of the spool 40 on the movable member 20 side is in contact with the end surface of the shaft 22.

The spring 50 has a spool 4 at one end.
0 is in contact with the end surface on the side opposite to the movable member 20, and the other end is in contact with the plate 51. The spring 50 urges the spool 40 in the direction of arrow B in FIG. Plate 51
Is an annular thin plate having a through hole 51a formed in the center.

Next, the operation of the hydraulic control valve 1 will be described. (1) FIG. 1 shows a state in which no current is supplied to the coil 16, no magnetic attraction is acting on the mover 21, and the spool 40 and the movable member 20 are moved to the state shown in FIG. In the position shown. At this time, communication between the opening 34 and the opening 35 of the spool control valve 30 is established, and between the opening 33 and the opening 34 and between the opening 35 and the opening 3.
6 is shut off, hydraulic oil is supplied from the pump 60 to the advance hydraulic chamber 67 through the openings 34 and 35. At the same time, since the opening 32 and the opening 33 communicate with each other, the hydraulic oil in the retard hydraulic chamber 65 is discharged to the oil tank 61.

(2) When the control current is supplied to the coil 16, the movable element 21 is attracted against the urging force of the spring 50 in the direction of the arrow A in FIG.
The spool 40 moves together with the movable member 20 in the direction of arrow A in FIG. Then, the opening 33 and the opening 34 of the spool control valve 30 communicate with each other, and the opening 34 and the opening 35 and the opening 33 and the opening 32 are shut off. 60
Hydraulic oil is supplied to the retard hydraulic chamber 65 through the openings 34 and 33. At the same time, the opening 35 communicates with the opening 36, so that the hydraulic oil in the advance hydraulic chamber 67 is discharged to the oil tank 61.

The position of the spool 40 is determined by the balance between the magnetic attraction force acting on the mover 21 and the urging force of the spring 50. Since the current value supplied to the coil 16 is proportional to the generated magnetic force, the position of the spool 40 can be linearly controlled by controlling the current value supplied to the coil 16. Therefore, the retard hydraulic chamber 65 and the advance hydraulic chamber 67
The amount of hydraulic oil supplied to or discharged from both hydraulic chambers can be adjusted by the position of the spool 40.

In the first embodiment, the flange portion 27 of the non-magnetic member 25 and the flange portion 31b of the sleeve 31 are fluid-tightly connected via an O-ring 29, and the non-magnetic member 25 is 1 and a gap 1 formed between the yoke 11 and the suction portion 12a of the fixed core 12.
9 is covered. Therefore, it is possible to prevent the hydraulic oil leaked to the mover 21 from leaking to the outside of the non-magnetic member 25, for example, to the coil 16 side. Further, since it is sufficient to seal the space between the sleeve 31 and the non-magnetic member 25, the number of seal members such as O-rings for preventing leakage of hydraulic oil can be reduced.

(Second Embodiment) FIG. 4 shows a second embodiment of the present invention.
Shown in The same reference numerals are given to the same components as those in the first embodiment, and the description is omitted. The movable member 70 has a movable element 71 made of a magnetic material and a shaft 74 protruding toward the spool 40 of the movable element 71. The mover 71 has a large-diameter portion 72 sliding on the inner wall of the bottomed cylindrical portion 26 of the nonmagnetic member 25 on both sides in the reciprocating movement direction.
It has a small diameter portion 73 smaller in diameter than the large diameter portion 72 and not sliding with the bottomed cylindrical portion 26. The escape passage 75 communicates a space on both sides of the mover 71 in the reciprocating movement direction with a space formed between the inner peripheral surface of the bottomed cylindrical portion 26 and the small diameter portion 73.

Even if foreign matter enters between the bottomed cylindrical portion 26 and the mover 71, the foreign matter is accommodated in the recess formed by the small diameter portion 73. Therefore, it is possible to prevent foreign matter that has entered between the bottomed cylindrical portion 26 and the mover 71 from hindering the reciprocating movement of the mover 71.

(Third Embodiment) FIG. 5 shows a third embodiment of the present invention.
And FIG. The same reference numerals are given to the same components as those in the first embodiment, and the description is omitted. The electromagnetic drive unit 80 of the hydraulic control valve 2 includes a yoke 81 as a first stator, a second
Fixed core 82 as a stator, bobbin 15, coil 1
6, mover 85, shaft 86 and cup-shaped member 90
have. The yoke 81 and the fixed core 82 constitute a stator.

The yoke 81 is formed from one continuous plate-like member. The yoke 81 includes an inner cylinder 81a and an outer cylinder 81b.
And a caulking portion 81c. The bobbin 15 and the coil 16 are housed between the inner cylinder 81a and the outer cylinder 81b. The yoke 81 is arranged outside the cup-shaped member 90 and faces the mover 85 radially outside the mover 85. The outer cylinder 81b is connected to the fixed core 82 via the outside of the coil 16. A caulking portion 81 is provided at the end of the outer cylinder 81b.
c is formed.

The flange 82b of the fixed core 82 is disposed between the flange 31b of the sleeve 31 and the flange 94 of the cup-shaped member 90. The O-ring 100 seals between the flange portion 31b and the flange portion 82b,
An O-ring 1 is provided between the flange 82b and the flange 94.
01 is sealed. The caulking portion 81c as a fastening means of the yoke 81 caulks the flange portion 31b of the sleeve 31 so that the flange portion 31b and the flange portion 82
b and the flange portion 94 are fastened in the axial direction.

The fixed core 82 is arranged inside the cup-shaped member 90. The suction portion 82a of the fixed core 82 forms a gap with the inner cylinder 81a with a predetermined length in the reciprocating direction of the mover 85. The fixed core 82 fixes an annular contact member 83 formed of a non-magnetic material inside. Spool 40
Is formed of a non-magnetic material, the contact member 8 as the contact portion
3 may be formed of a magnetic material or may be formed integrally with the fixed core.

A small diameter portion 85a as a concave portion is formed at the center of the mover 85 in the axial direction. At both ends in the axial direction of the small-diameter portion 85a, large-diameter portions 85b having a diameter larger than that of the small-diameter portion 85a and sliding as the small-diameter portion 92 of the cup-shaped member 90 are formed. The shaft 86 is press-fitted into the mover 85 and can contact the spool 40. The mover 85 slides on the inner peripheral wall of the small-diameter portion 92 of the cup-shaped member 90.

The cup-shaped member 90 is integrally formed of a non-magnetic member such as stainless steel in the order of a bottom portion 91, a small-diameter portion 92, a large-diameter portion 93, and a flange portion 94 from the side opposite to the spool of the mover 85. The opening 31 a of the sleeve 31 is covered. The bottom part 91, the small diameter part 92 and the large diameter part 93 constitute a cylindrical part. The small diameter portion 92 accommodates and supports the mover 85 so as to be able to reciprocate, and the large diameter portion 93 corresponds to the suction portion 8
2a. The flange portion 94 as a connecting portion to the simultaneous material with the indentation is formed by the caulking portion 81 c of the yoke 81 caulking the flange portion 31 b of the sleeve 31.
The sleeve 101, the flange portion 82 b of the fixed core 82, and the O-ring 100 are interposed with the sleeve 31 in a liquid-tight manner.

The movement of the spool 40 toward the mover 85 is as follows.
It is regulated by being locked to the contact member 83. In a state where the spool 40 is locked by the contact member 83, the movable element 8
5 and the shaft 86 have a predetermined amount d shown in FIGS.
It is movable in the axial direction. Therefore, the biasing force of the spring 50 is not transmitted to the bottom portion 91 of the cup-shaped member 90 via the mover 85 and the shaft 86 in a state where the power supply to the coil 16 is turned off. The swaged portion 81c of the yoke 81
When caulking the flange portion 31b of the sleeve 31,
Since the tightening force is not transmitted to the mover 85, the tightening force due to caulking is transmitted to the bottom 91 of the cup-shaped member 90 to prevent the bottom from being deformed.

When the hydraulic control valve 2 is attached to a location where it vibrates, the spool 40 and the mover 85 vibrate in the axial direction. At this time, the spool 40 is
When the movable element 85 collides with the bottom 91 due to vibration, the load of the spool 40 is not applied to the bottom 91. Therefore, the deformation of the bottom portion 91 is reduced, and the product life of the cup-shaped member 90 is extended. Further, since the displacement of the spool 40 can be regulated by the contact member 83, the displacement of the spool 40 can be controlled with high accuracy.

Since the small-diameter portion 85a is formed at the axial center of the mover 85, even if foreign matter enters between the small-diameter portion 92 of the cup-shaped member 90 and the mover 85, the small-diameter portion 85a Foreign matter is accommodated in the recess formed by 85a. Therefore, it is possible to prevent foreign matter that has entered between the small diameter portion 92 of the cup-shaped member 90 and the mover 85 from hindering the reciprocal movement of the mover 85. Further, since the large-diameter portion 85b that slides with the cup-shaped member 90 is formed at both ends in the axial direction of the small-diameter portion 85a, the mover 85 is inclined even if the small-diameter portion 85a is not supported by the cup-shaped member 90. Prevent crushing.

In the above-described embodiments showing the embodiments of the present invention, the cup-shaped member made of a non-magnetic material covers the opening 31a of the sleeve 31 as a housing, and the flange portion of the cup-shaped member is formed. Is connected to the flange portion 31b of the sleeve 31 by caulking. Therefore, it is possible to prevent the operating oil leaking to the mover side from leaking to the outside of the cup-shaped member, for example, to the coil 16 side.

Further, since the mover is directly supported by the cup-shaped non-magnetic member disposed on the inner periphery of the stator, there is no misalignment between the stator and the mover. Since it is not necessary to increase the inner diameter of the stator to absorb the misalignment, the size of the electromagnetic drive unit can be reduced. Furthermore, since the air gap formed between the inner cylinder of the yoke and the mover can be made as small as possible, the magnetic attraction does not decrease even if the size is reduced.

In the above embodiments, the spool as the valve member is held at the intermediate position by controlling the value of the current supplied to the coil constituting the electromagnetic drive unit, and the fluid flowing through the fluid flow path is controlled by the position of the spool. The hydraulic control valve for controlling the flow rate has been described. In addition, the configuration of the present invention may be applied to an electromagnetic valve that controls the fluid flow rate to two types by fully opening or closing the fluid flow path without holding the valve member at the intermediate position.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a hydraulic control valve according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG. 1, in which (A) forms an escape passage on the outer peripheral wall of the mover, and (B) shows an escape passage formed inside the mover.

FIG. 3 is an enlarged sectional view showing a mover and a non-magnetic member of the first embodiment.

FIG. 4 is an enlarged sectional view showing a mover and a non-magnetic member of a second embodiment.

FIG. 5 is a sectional view showing a hydraulic control valve according to a third embodiment of the present invention.

FIG. 6 is a sectional view showing an electromagnetic drive unit according to a third embodiment.

[Explanation of symbols]

 1, 2 Hydraulic control valve (electromagnetic valve) 10 Electromagnetic drive unit 11 Yoke (stator, first stator) 11a Inner peripheral cylinder part (inner cylinder) 11b Outer peripheral cylinder part (outer cylinder) 11c Caulking part (fastening means) 12 Fixed core (stator, 2nd stator) 12a Suction unit 12b Flange unit 16 Coil 21 Mover 25 Non-magnetic member (cup-like member) 26 Bottomed cylinder unit 27 Flange unit (connection unit) 30 Spool control valve (valve unit) 31) sleeve (housing) 31a opening 31b flange 40 spool (valve member) 71, 85 mover 73 small diameter portion (recess) 81 yoke (stator, first stator) 81a inner cylinder 81b outer cylinder 81c caulking section ( Fastening means) 82 Fixed core (stator, second stator) 82a Suction part 82b Flange part 85 Mover 85a Small diameter part (concave part) 85b Large diameter part (convex part) 90 Jo member (non-magnetic member) 91 bottom 92 small diameter portion 93 large diameter portion 94 a flange portion (connecting portion)

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Iwa ▼ Saki ▲ Kazutoshi 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside Denso Corporation (72) Inventor Noboru Matsusaka 1-1-1, Showa-cho, Kariya-shi, Aichi Share Inside Denso Corporation (72) Inventor Yoshiyuki Murao 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside Denso Corporation (72) Inventor Masahiko Ochiai 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture F-term in Denso Corporation (Reference) 3H106 DA02 DA08 DA23 DB02 DB12 DB23 DB32 DC09 DC20 DD04 EE04 EE34 EE39 GA13 GA25 KK03 KK17

Claims (23)

[Claims] A movable member; a valve member that reciprocates with the movable member to control a flow rate of a fluid flowing through a fluid flow path; a biasing unit that biases the movable member in one of reciprocating directions; A coil that generates a magnetic force for attracting the mover in the other direction of movement, a stator that forms a magnetic circuit with the mover, a cylindrical portion that covers an outer peripheral side surface of the mover, and A stator having a suction portion that forms a gap in the reciprocating direction of the mover and suctions the mover in the other direction in the reciprocating direction, and is disposed on the inner periphery of the stator and reciprocates the mover. A non-magnetic member that is movably supported, covers one end of the mover in the reciprocating movement direction, and extends to the suction portion and is formed in a cup shape that covers the gap. And a solenoid valve. 2. The solenoid valve according to claim 1, wherein the non-magnetic member has a flange on the other side in the reciprocating direction. 3. The movable element according to claim 1, wherein a concave portion is provided in a sliding portion with the non-magnetic member.
The described solenoid valve. 4. The solenoid valve according to claim 1, wherein an escape passage communicating with spaces located on both sides of the movable element in the reciprocating movement direction is provided in the movable element. 5. The solenoid valve according to claim 1, wherein a coating is applied to a sliding portion of the mover that slides with the non-magnetic member. 6. A valve member having a valve member for opening and closing a fluid flow path, and a housing for housing the valve member and having an opening formed therein for operating the valve member, a coil, a stator and a movable member. And an electromagnetic drive unit that moves the valve member in accordance with the movement of the movable element. A cup-shaped member formed of a thin non-magnetic member and covering the opening of the housing. An electromagnetic valve, comprising: a bottomed tubular cup-shaped member having a connecting portion liquid-tightly connected to the housing and a tubular portion for supporting the mover movably in an axial direction. . 7. The housing has a flange portion extending in a radial direction around the opening, the connecting portion of the cup-shaped member is a flange portion expanding in a radial direction, and the two flange portions are connected in an axial direction. 7. The solenoid valve according to claim 6, further comprising fastening means for fastening. 8. The stator has a first stator that faces the mover radially outside the mover, and a second stator that is located in the axial direction of the mover. 8. The solenoid valve according to claim 6, wherein the first stator and the second stator are arranged outside the cup-shaped member. 9. The stator according to claim 1, further comprising: a first stator facing the mover on a radially outer side of the mover, and a second stator positioned in an axial direction of the mover. The solenoid valve according to claim 6, wherein one stator is disposed outside the cup-shaped member, and the second stator is disposed inside the cup-shaped member. 10. The solenoid valve according to claim 9, wherein the second stator is disposed between the cup-shaped member and the housing. 11. The first stator is disposed outside the cup-shaped member, and the first stator is opposed to the mover radially outside the mover, and is disposed inside the cup-shaped member. A second stator positioned in the axial direction of the mover, wherein the second stator includes a flange portion disposed between the flange portion of the cup-shaped member and the flange portion of the housing. The solenoid valve according to claim 7, comprising: 12. The fastening device according to claim 11, wherein the fastening means is a caulking portion formed on the first stator, and the plurality of flange portions are fastened in the axial direction by the caulking portion. solenoid valve. 13. The cup-shaped member according to claim 9, wherein the cup-shaped member has a small-diameter portion for accommodating the mover and a large-diameter portion for accommodating the second stator. The described solenoid valve. 14. The device according to claim 9, wherein the second stator has a contact portion capable of contacting the valve member.
4. The solenoid valve according to claim 3. 15. The solenoid valve according to claim 14, wherein the contact portion is a non-magnetic member. 16. The solenoid valve according to claim 14, further comprising a spring for urging the valve member toward the contact portion. 17. The solenoid valve according to claim 14, wherein the movable member is movable in the axial direction by a predetermined amount when the valve member is in contact with the contact portion. 18. The device according to claim 18, wherein the first stator has an inner cylinder located outside the mover, and an outer cylinder connected to the second stator via the outside of the coil. The solenoid valve according to any one of claims 9 to 17. 19. The solenoid valve according to claim 18, wherein the inner cylinder and the outer cylinder of the first stator are formed by a continuous plate-like member. 20. The solenoid valve according to claim 6, wherein the movable element has a concave portion in a sliding portion with the cup-shaped member. 21. The solenoid valve according to claim 20, wherein the concave portion is provided at a central portion in the axial direction of the mover, and the movable member has convex portions at both axial ends of the concave portion. 22. The solenoid valve according to claim 6, wherein an escape passage communicating with spaces located on both sides of the movable element in the reciprocating movement direction is provided in the movable element. 23. The solenoid valve according to claim 6, wherein a coating is applied to a sliding portion of the mover that slides with the cup-shaped member.