JP3139350B2 - Solenoid valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a solenoid valve device.

[0002]

2. Description of the Related Art Some brake devices for vehicles are provided with an ABS (anti-lock brake system) to prevent the wheels from being locked during sudden braking or the like. This ABS is generally a speed sensor, ABS
It is composed of a computer, an ABS actuator and the like, and the ABS actuator is composed of a plurality of solenoid valves, pumps and the like.

[0003] Fig. 7 shows an example of a conventional solenoid valve [Automotive technology casebook: issue number 93907].
(Issue date: 1994.1.10)]. In this electromagnetic valve 80, a core 84 is press-fitted and fixed in a sleeve 82, and a plunger 86 is movably housed. A shaft 88 is integrally fixed to the plunger 86, penetrates the core 84, and is provided with a valve element 90 at the tip. The solenoid valve 80 includes a seat valve 92
The lower end of the sleeve 82 is swaged and fixed to the housing 96 in a state where the valve element 90 corresponds to the flow path 94 formed by the above. A yoke (not shown) containing a coil is arranged around the sleeve 82.

When the coil is energized, the plunger 86 is attracted to the core 84 and the shaft 88
And the valve body 90 contacts the seat valve 92 to close the flow path 94.

In the conventional solenoid valve 80 configured as described above, after a skirt portion 82A formed at the lower end opening edge of the sleeve 82 is covered in a predetermined groove formed in the housing 96, the sealing portion is formed. In a state in which the skirt portion 82A is pressed against the housing 96 by the 98, the peripheral portion of the groove (the caulked portion 100) is caulked and fixed.

[0006]

However, in such a conventional solenoid valve 80, when the skirt portion 82A of the sleeve 82 and the housing 96 are pressed and fixed by the seal portion 98 as described above, the skirt Position (point) where the portion 82A first comes into contact with the housing 96
The fulcrum serves as a fulcrum, and a rotational moment having the tip of the skirt portion 82A as a point of force acts on the sleeve 82. Therefore, the sleeve 82 may be unnecessarily deformed (bulged). When such deformation of the sleeve 82 occurs, the press-fit portion between the core 84 and the sleeve 82 is loosened, and the core 84 is displaced with respect to the plunger 86, and the air gap ΔG (plunger The gap between the core 86 and the core 84) changes, and the predetermined characteristics of the solenoid valve 80 vary.

[0007] In view of the above facts, the present invention can properly maintain the air cap provided between the core and the plunger without increasing the number of parts or deteriorating the assemblability, and may cause variations in characteristics. The aim is to obtain no solenoid valve device.

[0008]

According to a first aspect of the present invention, there is provided an electromagnetic valve device having a body in which a valve chamber is formed, and a skirt portion bent outward at an open end of a bottomed cylindrical shape. ,
A sleeve having a core fixed thereto and having the opening end side integrally fixed to the body, a plunger movably disposed in the sleeve, and a valve integrally provided in the plunger for opening and closing a flow path A body, a valve seat forming body which is fixed to the body and is opposed to the valve body to form a valve seat on which the valve body is seated, and between the core and the plunger provided on the outer periphery of the sleeve. A magnetic force applying means for applying a magnetic force, wherein the electromagnetic valve device is fixed to an apparatus housing in a state where the skirt portion of the sleeve is pressed against the body, and the skirt portion of the sleeve during the pressing. And a contact position determining means for determining a contact position with the body.

In the solenoid valve device according to the first aspect, the skirt portion of the sleeve integrally fixed to the body is fixed to the device housing while being pressed against the body.

Here, at the time of pressing against the body, the contact position between the skirt portion of the sleeve and the body is uniquely determined by the contact position determining means. That is, the skirt portion of the sleeve and the body are always in contact at a fixed position, and variations in the contact position are suppressed.

Therefore, if the air gap provided between the core and the plunger is appropriately adjusted in advance, when the sleeve and the body are fixed to the apparatus housing, they are based on the relative positions of the sleeve, that is, the core and the body, that is, the plunger. The air gap does not change in the individual solenoid valve devices. Therefore, the predetermined characteristics of the solenoid valve device do not vary.

According to a second aspect of the present invention, in the solenoid valve device according to the first aspect, the contact position determining means is integrated with the skirt portion of the sleeve or the body corresponding to the skirt portion. It is characterized in that it is a convex portion provided in an intended manner.

[0013] In the solenoid valve device according to the second aspect, the convex portion that determines the contact position between the skirt portion of the sleeve and the body,
Since it is provided on the skirt portion of the sleeve or on the body corresponding to the skirt portion, it is possible to form the convex portion (contact position determining means) simultaneously with the formation of these skirt portions or the body, so that the cost does not increase. .

According to a third aspect of the present invention, in the solenoid valve device according to the first or second aspect, the abutting position determining means is arranged such that the abutting position determining means is located closer to the bent base end of the skirt. It is characterized in that it is provided close to the tip of the skirt.

In the solenoid valve device according to the third aspect, when the sleeve and the body are fixed to the device housing, the fixing force (pressure contact force) uses the contact position determining means (convex portion) as a fulcrum and the tip of the skirt portion as a force point. Is applied to the sleeve (cylindrical body). However, since the contact position determining means (convex portion) is provided closer to the distal end of the skirt portion than to the bent base end portion of the skirt portion (in other words, it is provided closer to the point of force), the The rotating moment that occurs is small. Therefore, the force acting on the sleeve (on the side of the base end of the skirt) is small,
The amount of deformation of the sleeve can be reduced.

Therefore, when the sleeve and the body are fixed to the apparatus housing, the amount of displacement of the sleeve relative to the body is small, the relative position between the sleeve, ie, the core, and the body, ie, the plunger does not change, and the amount of change in the air gap is small. . Therefore, the predetermined characteristics of the solenoid valve device do not vary.

[0017]

FIG. 1 is a sectional view showing the overall configuration of a solenoid valve device 10 according to an embodiment of the present invention.

The electromagnetic valve device 10 is built in an ABS actuator provided on the ABS of the vehicle, and has a valve unit 12. The valve unit 12 includes a guide block 14 as a body. The guide block 14 is formed in a cylindrical block shape, and a valve chamber 16 is formed in a central portion. The guide block 14 is formed with a tapered flange portion 17.
As shown in detail in FIG. 2, the tapered surface of the tapered flange portion 17 is a two-step tapered surface that is continuous at different taper angles, and the corner portion (boundary portion) of the tapered portion constitutes a contact position determining means. It is a part 19. Furthermore, this convex portion 19
Is provided closer to the distal end portion B than to the proximal end portion A of the tapered flange portion 17.

Further, a guide hole 18 is formed in the guide block 14 along the longitudinal axis.
Are movably supported.

One end of the shaft 20 reaches the valve chamber 16, and a spherical valve body 22 is provided. Also,
The other end of the shaft 20 further projects outside from the guide block 14, and the plunger 24 is fixed. Therefore, the plunger 24 and the shaft 20 always move integrally.

Around the plunger 24, a sleeve 28
Is arranged. The sleeve 28 is formed in a substantially cylindrical shape having an upper wall 28A, and the lower end portion is expanded in a skirt shape to form a skirt portion 30. With the sleeve 28 covering the plunger 24, the skirt 3
The upper end of the guide block 14 is press-fitted at the press-fitting portion 32 near zero, and the sleeve 28 and the guide block 14 are integrally fixed with the skirt portion 30 of the sleeve 28 pressed against the tapered flange portion 17 of the guide block 14. Have been.

A core 34 is fixed to the inside of the sleeve 28 so as to face the plunger 24, and a return spring 36 is provided in the bottomed hole 26 provided in the core 34. . As a result, the plunger 24, that is, the shaft 20 is constantly urged in a direction away from the core 34.

On the other hand, a seat valve 4 as a valve seat forming body is provided at the lower end of the guide block 14 (immediately below the valve chamber 16).
0 is press-fitted and fixed. That is, the seat valve 40 is integrated with the guide block 14 to form the sleeve 2.
8 is fixed. A flow path 42 having the same axis as the shaft 20 is formed in the axis of the seat valve 40, and the upper end opening is located in the valve chamber 16 and faces the valve element 22. Therefore, the valve body 22 normally urged in the direction of the seat valve 40 by the urging force of the return spring 36 closes the flow path 42, and furthermore, a predetermined air gap is provided between the plunger 24 and the core 34. ΔG (for example, 0.30 to 0.35 mm) is provided.

The seat valve 4 as a valve seat forming body
0 may be formed integrally with the guide block 14 to form a single part.

A cup seal 44 is mounted around the seat valve 40.

As described above, the valve unit 12 constituted by the seat valve 40, the guide block 14, the sleeve 28, the shaft 20, the plunger 24 and the like is a single unit part.
2 is attached to the housing 46 of the ABS actuator. The housing 46 is made of, for example, aluminum, and the valve unit 12 is inserted into a mounting hole 48 formed in the housing 46, and is mounted by caulking the entire circumference in a state where the backup ring 50 is superimposed on the skirt portion 30. I have.

A yoke 56 containing an inner yoke 52 and a coil 54 is disposed around the valve unit 12 (sleeve 28) attached to the housing 46. As a result, when the coil 54 is energized, the plunger 24 is attracted to the core 34 and moves together with the shaft 20 against the urging force of the return spring 36, and the valve body 22 separates from the flow path 42 and 42 is open.

An oil passage 57 and an oil passage 58 are formed in the mounting hole 48 formed in the housing 46 so as to correspond to the valve chamber 16 of the guide block 14. The oil passage 57 communicates with a master cylinder (not shown) of the brake device, and the oil passage 58 communicates with a wheel cylinder (not shown). The seat valve 40 is provided at the bottom of the mounting hole 48.
An oil passage 59 is formed corresponding to the flow passage 42 of the first embodiment, and communicates with a reservoir (not shown).

Next, the operation of the present embodiment will be described with reference to the solenoid valve device 1.
A description will be given in accordance with a procedure for manufacturing (assembling) 0.

In the electromagnetic valve device 10 having the above-described configuration, first, the core 34 is fixed to the sleeve 28 by caulking. Next, the plunger 24 to which the shaft 20 is fixed is inserted into the sleeve 28 together with the return spring 36, and the guide block 14 is further overlapped with the sleeve 28, and then press-fitted at the press-fitting portion 32 and fixed. Further, the seat valve 40 equipped with the cup seal 44 is press-fitted into the guide block 14 and fixed.
Is completed.

Thereafter, the sleeve 28 (skirt portion 30) of the unitized valve unit 12 is caulked and fixed to the housing 46 together with the backup ring 50, and further, around the valve unit 12 (sleeve 28) attached to the housing 46. Then, the yoke 56 containing the inner yoke 52 and the coil 54 is attached thereto, and the electromagnetic valve device 10 is completed.

Here, in the solenoid valve device 10, when the backup ring 50 is pressed against the skirt 30 of the sleeve 28 and the tapered flange 17 of the guide block 14.
Means that the contact positions of each other are uniquely determined by the contact position determining means. That is, the skirt portion 30 of the sleeve 28 comes into contact with the convex portion 19 of the two-stage tapered surface formed on the tapered flange portion 17 of the guide block 14, and is pressed by the caulking force in this state. For this reason, the sleeve 28
The skirt portion 30 and the tapered flange portion 17 of the guide block 14 are always in contact at a fixed position (the convex portion 19), and variation in the contact position is suppressed.

Therefore, if the air gap ΔG provided between the core 34 and the plunger 24 is appropriately adjusted in advance, when the sleeve 28 and the guide block 14 are caulked and fixed to the housing 46 together with the backup ring 50, The air gap ΔG based on the relative position of the core 28 and the guide block 14, that is, the plunger 24, does not change in each solenoid valve device 10. Therefore, the characteristics of the individual solenoid valve devices 10 do not vary.

Further, when the sleeve 28 and the guide block 14 are caulked and fixed together with the backup ring 50 to the housing 46, a rotational moment having the convex portion 19 as a fulcrum and the tip of the skirt portion 30 as a power point is applied by a caulking force. Act on the part 32). However, since the convex portion 19 is provided closer to the distal end portion B than the proximal end portion A of the tapered flange portion 17, in other words, the skirt portion 30 of the sleeve 28 has a greater height than its bent proximal end portion. The position close to the tip is the taper flange 17
(In other words, because the projection 19 is provided at a position close to the point of force), the generated rotational moment is small. Therefore, the force acting on the sleeve 28 (the press-fit portion 32) is small, and the sleeve 28 (the press-fit portion 32) does not deform.

FIG. 3 shows the tapered flange portion 17.
Experimental results are shown on the relationship between the diameter φP at the position where the convex portion 19 is formed and the relative position change before and after the sleeve 28 and the guide block 14 are fixed by caulking. Similarly, FIG. 4 shows an experiment on the relationship between the diameter dimension φP at the position where the convex portion 19 of the tapered flange portion 17 is formed and the deformation (bulging) state of the sleeve 28 (press-fit portion 32) before and after caulking. The results are shown.

As shown in these graphs, when the diameter dimension φP is large, that is, when the convex portion 19 is
The sleeve 2 is provided close to the tip B of the
It can be seen that the relative position change amount between before and after the caulking of the sleeve 8 and the guide block 14 and the deformation (bulging) of the sleeve 28 (the press-fit portion 32) are small.

Accordingly, the sleeve 28 and the guide block 14 are joined together with the backup ring 50 to the housing 4.
6, the sleeve 28 does not displace with respect to the guide block 14, the relative position between the sleeve 28, that is, the core 34, and the guide block 14, that is, the plunger 24 does not change, and the air gap ΔG changes. There is no. Therefore, the predetermined characteristics of the solenoid valve device 10 do not vary.

Further, in the solenoid valve device 10, as described above, the convex portion 19 that determines the contact position between the skirt portion 30 of the sleeve 28 and the tapered flange portion 17 of the guide block 14.
However, since the taper flange portion 17 is provided, the convex portion 19 (contact position determining means) can be formed at the same time when the guide block 14 is formed, and the cost does not increase.

Further, the solenoid valve device 1 according to the present embodiment
In the case of 0, the tapered surface of the tapered flange portion 17 is a two-step tapered surface that is continuous at different taper angles, and the corner portion (boundary portion) is the convex portion 19 that constitutes the contact position determining means. When the skirt portion 30 of the sleeve 28 is pressed against the tapered flange portion 17, the tapered flange portion 17 over the entire region on the tip end B side of the convex portion 19 comes into contact with the skirt portion 30. Therefore, the pressing force of the skirt portion 30 against the tapered flange portion 17 is dispersed, and stress concentration on the skirt portion 30 is reduced.

Further, in the solenoid valve device 10 according to the present embodiment, the valve unit 12 is fixed by caulking the entire circumference thereof in a state where the backup ring 50 is superimposed on the skirt portion 30 of the sleeve 28. 4
The stress concentration at the caulked portion 6 is avoided, and the sealing performance can be reliably maintained even when the housing 46 is made of aluminum, for example.

In the above embodiment, the tapered surface of the tapered flange portion 17 of the guide block 14 is formed as a two-stage tapered surface that is continuous at different taper angles, so that the convex portion 19 is in contact with the contact position determining means. Has been described, but the contact position determining means is not limited to such a convex portion 19 and may have another configuration.

For example, as in an electromagnetic valve device 60 shown in FIG. 5, a configuration may be employed in which the projection 62 is simply formed on the tapered flange portion 17 of the guide block 14, or FIG.
As shown in a solenoid valve device 70 shown in FIG. 7, the protrusion 28 may be formed on the skirt portion 30 of the sleeve 28.

Even in these cases, the skirt portion 30 of the sleeve 28 and the tapered flange portion 17 of the guide block 14 always have a fixed position (the protrusion 62 or the protrusion 7).
The contact occurs in 2), and variation in the contact position is suppressed.
Further, the sleeve 28 (the press-fit portion 32) does not deform. Therefore, the relative position between the sleeve 28, that is, the core 34, and the guide block 14, that is, the plunger 24 does not change, and the air gap ΔG does not change. Therefore, the predetermined characteristics do not vary.

In each of the above embodiments, the guide block 14 is overlapped with the sleeve 28 so that the press-fit portion 3
2, the seat valve 40 is press-fitted into the guide block 14 and then fixed. However, the present invention is not limited to this. First, the seat valve 40 is press-fitted into the guide block 14 and fixed. The guide block 14 may be fixed to the sleeve 28 later. In this case, the guide block 14 is
The air gap ΔG can be appropriately set and managed at the stage of superposing and positioning. Therefore, if the positioning when the guide block 14 is fixed to the sleeve 28 together with the seat valve 40 is appropriately adjusted in advance, when the valve unit 12 (sleeve 28) is crimped and fixed to the housing 46, the sleeve 28, that is, the core 34 is fixed. Since the relative position of the guide block 14, that is, the plunger 24 does not change, the air gap ΔG
Does not change and is reliably maintained at the predetermined value.

In each of the above embodiments, the solenoid valve device 10 (valve unit 12) and the like have been described as being mounted on the aluminum housing 46. However, the present invention is not limited to this. The present invention can be applied to a housing made of a material other than aluminum.

In each of the above embodiments, the normally closed solenoid valve device 1 in which the valve body 22 normally closes the flow path 42 is used.
Although 0, 60, and 70 have been described, the present invention is not limited to this, and can be applied to a normally-open solenoid valve.

Further, in the above-described embodiment, the electromagnetic valve devices 10, 60 and 70 built in the ABS actuator provided in the ABS of the vehicle have been described.
The present invention is not limited to this, and can naturally be applied to other solenoid valves other than the ABS actuator.

[0048]

As described above, the solenoid valve device according to the present invention can be used without increasing the number of parts or deteriorating the assemblability.
It has an excellent effect that the air cap provided between the core and the plunger can be properly maintained and the characteristics do not vary.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of an electromagnetic valve device according to an embodiment of the present invention.

FIG. 2 is a sectional view showing details of a convex portion of a tapered flange portion and a skirt portion of a sleeve of the solenoid valve device shown in FIG.

FIG. 3 is a diagram showing a relationship between a diameter dimension at a position where a convex portion of a tapered flange portion is formed in the solenoid valve device according to the embodiment of the present invention and a relative position change before and after the sleeve and the guide block are fixed by caulking. is there.

FIG. 4 is a diagram showing a relationship between a diameter dimension at a position where a convex portion of a tapered flange portion is formed in the solenoid valve device according to the embodiment of the present invention and a deformed state of a sleeve before and after caulking.

FIG. 5 is a sectional view showing details of a tapered flange portion and a skirt portion of a sleeve of an electromagnetic valve device according to another embodiment of the present invention.

FIG. 6 is a sectional view showing details of a tapered flange portion and a skirt portion of a sleeve of an electromagnetic valve device according to another embodiment of the present invention.

FIG. 7 is a sectional view showing a configuration of a conventional solenoid valve.

[Explanation of symbols]

 Reference Signs List 10 solenoid valve device 12 valve unit 14 guide block (body) 17 taper flange portion 19 convex portion (contact position determining means) 20 shaft 22 valve body 24 plunger 28 sleeve 30 skirt portion 34 core 40 seat valve (valve seat forming body) 42 flow path 46 housing 60 solenoid valve 62 projection (contact position determination means) 70 solenoid valve 72 projection (contact position determination means)

──────────────────────────────────────────────────の Continuation of front page (56) References JP-A-7-280122 (JP, A) JP-T5-503268 (JP, A) JP-T5-506295 (JP, A) JP-T-7 506313 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16K 31/06-31/11 F16K 27/00-27/12

Claims (3)

(57) [Claims] 1. A body in which a valve chamber is formed, and a skirt portion which is bent outward at an opening end of a bottomed cylindrical shape is formed, a core is fixed, and a side of the opening end is connected to the body. A sleeve integrally fixed, a plunger movably disposed in the sleeve, a valve body provided integrally with the plunger to open and close a flow path, and the body positioned opposite to the valve body. A valve seat forming body fixed to the valve body and forming a valve seat on which the valve body is seated; and a magnetic force applying means provided on an outer periphery of the sleeve and applying a magnetic force between the core and the plunger; And a contact position determining means for determining a contact position between the skirt portion of the sleeve and the body at the time of the pressure contact. Solenoid valve device characterized by comprising. 2. The device according to claim 1, wherein said contact position determining means is a skirt portion of said sleeve or a convex portion provided integrally with said body corresponding to said skirt portion. Solenoid valve device. 3. The skirt portion according to claim 1, wherein the contact position determining means is provided closer to a distal end of the skirt portion than to a bent base end portion of the skirt portion. Solenoid valve device.