JPH10213256A - Manufacture of solenoid valve system, and solenoid valve system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold constant the quality and characteristic of the pressed-in portion of a valve-seat formation or seat valve fixed in the body of a solenoid valve system without causing any increase in the number of component parts used for the valve and any degradation in the assembling work of the valve. SOLUTION: A solenoid valve system 10 involves a seat valve 40 pressed in a guide block 14. The seat valve 40 has a main pressed-in portion 40A and a subsidiary pressed-in portion 40B of smaller diameters or interference, which is adapted to be pressed in a press-in hole 15 before the main pressed-in portion 40A. The subsidiary pressed-in portion 40B of the seat valve 40 being pressed thus correctively adjusts the inside diameter of the press-in hole 15 to prevent dispersion in quality of the pressed-in portions fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for manufacturing a solenoid valve device and 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.

Here, in a conventional solenoid valve, a core is press-fitted and fixed in a sleeve, and a plunger is movably housed. The shaft is integrally fixed to the plunger, and a valve body is provided at the tip.
A guide block is fixed to an opening at the lower end of the sleeve, and a shaft of the plunger penetrates through the guide block. A valve chamber is formed in the guide block, and the valve body at the tip of the shaft is located. Further, a seat valve in which a flow path communicating with the valve chamber is formed is fixed to the guide block. In this case, the seat valve is press-fitted and fixed to the guide block in a state where the valve element corresponds to the flow path and has a predetermined air gap. Thus, a valve unit is configured.

Further, the lower end of the sleeve of the valve unit having the above-mentioned structure is fixed to the housing by caulking.
Further, a yoke containing a coil is arranged around the sleeve. Thereby, when the coil is energized, the plunger is attracted to the core and moves together with the shaft, and the valve body contacts the seat valve to open the flow path.

In the conventional solenoid valve configured as described above, the seat valve is press-fitted into a fitting hole formed in the guide block and fixed. There is a disadvantage that variations in the press-fit holding force, the degree of burr generation, etc.) are likely to occur. That is, the quality of the press-fit fixed portion of such a seat valve is determined by the outer diameter of the seat valve and the inner diameter of the fitting hole formed in the guide block (in other words, the interference between both). Generally, the inner diameter machining accuracy of the hole is lower than the outer diameter machining accuracy of the shaft, and therefore, the inner diameter dimensional accuracy of the fitting hole formed in the guide block tends to be particularly uneven. For this reason, even if a predetermined interference is set in order to ensure the quality of the press-fit fixed portion of the seat valve, the quality of the press-fit portion tends to vary due to the variation of the inner diameter dimensional accuracy of the fitting hole. .

[0006] If the quality (press-in force, press-in holding force, degree of burr generation, etc.) of the press-fitting fixed portion of the seat valve varies, predetermined characteristics of the solenoid valve may vary.

In this case, if the outer diameter of the seat valve and the inner diameter of the fitting hole formed in the guide block are simply made to have high accuracy in order to reduce the variation in the quality of the press-fitting fixed portion, the cost is greatly increased. become.

On the other hand, as disclosed in Japanese Patent Application Laid-Open No. 8-52625, a technique has been proposed in which a seat valve is pressed into a housing (guide block) by a pressing force for forming a valve surface of the seat valve. However, with the press-fitting technique disclosed in the above publication, although the number of steps can be reduced, it is not possible to reduce the variation in quality of the press-fitting fixed portion due to the variation in the accuracy of the inner diameter of the fitting hole.

[0009]

SUMMARY OF THE INVENTION In consideration of the above facts, the present invention does not involve an increase in the number of parts and a deterioration in assemblability.
An object of the present invention is to provide a method of manufacturing an electromagnetic valve device and an electromagnetic valve device in which the press-fitting quality of a press-fitting fixed portion of a valve seat forming body (seat valve) fixed to a body is stable and characteristics do not vary.

[0010]

According to a first aspect of the present invention, there is provided a method of manufacturing an electromagnetic valve device, comprising a body having a valve chamber formed therein, a bottomed cylindrical shape, a core fixed, and an open end. Side is integrally fixed to the body, a plunger movably disposed in the sleeve, a valve body provided integrally with the plunger and opening and closing a flow path,
A valve seat forming body which is positioned opposite to the valve body, is press-fitted and fixed to the body with a predetermined interference, and forms a valve seat on which the valve body is seated; and the core and plunger provided on the outer periphery of the sleeve Magnetic force applying means for applying a magnetic force between
A method of manufacturing an electromagnetic valve device having a main press-fit portion fixedly press-fitted to the body of the valve seat forming body with a predetermined interference, A preliminary press-fitting part which is located at the front end side in the press-fitting direction and is set to a smaller interference than a predetermined interference of the main press-fitting part, when press-fitting and fixing the valve seat forming body to the body, The main press-fitting portion is press-fitted and fixed to the body while the preliminary press-fitting portion precedes the main press-fitting portion and is preliminarily press-fitted into the body.

In the method for manufacturing an electromagnetic valve device according to the first aspect, a main press-fitting portion and a preliminary press-fitting portion are provided at a portion where the valve seat forming body is press-fitted into the body. When the valve seat forming body is press-fitted and fixed to the body, the main press-fit portion is press-fitted and fixed to the body while the preliminary press-fit portion is preliminarily press-fitted into the body before the main press-fit portion.

Therefore, even if there is some variation in the dimensional accuracy of the inner diameter of the press-fitting hole formed in the body, the preliminary press-fitting portion of the valve seat forming body is preliminarily pressed into the press-fitting hole of the body. The inner diameter of the press-fitting hole is corrected (it automatically follows the outer diameter of the preliminary press-fitting part), and then the main press-fitting part is press-fitted and fixed. Press-fit and fixed.

Since the preliminary press-fitting portion of the valve seat forming body is preliminarily press-fitted into the press-fitting hole of the body, the inner diameter of the press-fitting hole is corrected (the outer diameter of the preliminary press-fitting portion is automatically adjusted). If the outer diameters (tightening) of the main press-fitting portion and the preliminary press-fitting portion of the valve seat forming body are appropriately set in advance, the quality (press-in, press-fitting) of the press-fitting fixed portion of the valve seat forming body can be adjusted. Holding power,
Variations in the degree of burr occurrence) are suppressed.

Therefore, since the quality of the press-fitting fixed portion of the valve seat forming body is stabilized, the predetermined characteristics of the solenoid valve device do not vary in each solenoid valve device.

Further, since the main press-fitting portion and the preliminary press-fitting portion are merely provided on the valve seat forming body, the number of parts does not increase and the assembling property does not deteriorate.

As described above, according to the method for manufacturing the solenoid valve device of the first aspect, the press-fitting of the press-fitting fixed portion of the valve seat forming body fixed to the body without increasing the number of parts or deteriorating the assemblability. The quality is stable and the characteristics do not vary.

According to a second aspect of the present invention, there is provided an electromagnetic valve device having a body in which a valve chamber is formed, a bottomed cylindrical shape, a core fixed, and an opening end side integrally fixed to the body. A sleeve, a plunger movably disposed in the sleeve, a valve body provided integrally with the plunger to open and close a flow path, and a predetermined fastening to the body positioned opposite the valve body. A valve seat forming body which is press-fitted and fixed by a margin and forms a valve seat on which the valve body is seated, and magnetic force applying means provided on the outer periphery of the sleeve and applying a magnetic force between the core and the plunger; A valve device, wherein the valve seat forming body is press-fitted and fixed to the body,
A main press-fitting portion that is press-fitted and fixed to the body with a predetermined interference, and an interference that is set at a front end side in the press-fit direction with respect to the main press-fit portion and is set to be smaller than a predetermined interference of the main press-fit portion. And a preliminary press-fitting section preliminarily press-fitted into the body prior to the main press-fitting section.

In the solenoid valve device according to the second aspect, the main press-fitting portion and the preliminary press-fitting portion are provided at the portion where the valve seat forming body is press-fitted to the body, and the preliminary press-fitting portion is larger than the main press-fitting portion. It is preliminarily press-fitted into the body and fixed.

Therefore, when this valve seat forming body is press-fitted and fixed to the body, even if there is some variation in the inner diameter dimensional accuracy of the press-fitting hole formed in the body, the preliminary press-fitting of the valve seat forming body is performed. The inner diameter of the press-fit hole is corrected by automatically press-fitting the part into the press-fit hole of the body (it automatically follows the outer diameter of the preliminary press-fit part), and then the main press-fit part is press-fitted and fixed. The valve seat forming body is securely press-fitted and fixed to the body with a predetermined interference.

As described above, since the preliminary press-fitting portion of the valve seat forming body is preliminarily pressed into the press-fitting hole of the body, the inner diameter of the press-fitting hole is corrected (the outer diameter of the preliminary press-fitting portion is automatically adjusted). If the outer diameters (tightening) of the main press-fitting portion and the preliminary press-fitting portion of the valve seat forming body are appropriately set in advance, the quality (press-in, press-fitting) of the press-fitting fixed portion of the valve seat forming body can be adjusted. Holding power,
Variations in the degree of burr occurrence) are suppressed.

Therefore, since the quality of the press-fitting fixed portion of the valve seat forming body is stabilized, the predetermined characteristics of the solenoid valve device do not vary among individual solenoid valve devices.

Further, since only the main press-fitting portion and the preliminary press-fitting portion are provided in the valve seat forming body, there is no increase in the number of parts or deterioration in assemblability.

As described above, in the solenoid valve device according to the second aspect, the press-fitting quality of the press-fitting fixed portion of the valve seat forming body fixed to the body is stable without increasing the number of parts or deteriorating the assemblability. Therefore, there is no variation in characteristics.

[0024]

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.

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 element 22 is further 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.

A sleeve 28 is provided around the plunger 24.
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, at the lower end of the guide block 14 (immediately below the valve chamber 16), a seat valve 4 as a valve seat forming body is provided.
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.

FIG. 2 shows the correspondence between the guide block 14 and the seat valve 40 in a state before the guide block 14 is press-fitted and fixed.

Guide block 14 of seat valve 40
The press-fitting portion 40A is provided at the press-fitting fixed portion to the (press-fitting hole 15).
And a preliminary press-fitting portion 40B. Main press-fit section 40
The outer diameter X of A corresponds to the inner diameter Z of the press-fitting hole 15 of the guide block 14, and both are set so as to be press-fitted with a predetermined interference.

On the other hand, the preliminary press-fitting section 40B is
It is located at the front end side in the press-fitting direction (the upper end opening side of the flow path 42) with respect to A, and is preliminarily press-fitted into the press-fitting hole 15 of the guide block 14 before the main press-fitting portion 40A. is there.

Here, the outer diameter dimension Y of the preliminary press-fitting portion 40B is set to be smaller than a predetermined interference of the main press-fitting portion 40A. That is, the outer diameter dimension Y of the preliminary press-fitting portion 40B is set to be larger than the inner diameter dimension Z of the press-fitting hole 15 of the guide block 14, and the outer diameter dimension Y of the preliminary press-fitting portion 40B is larger than that of the main press-fitting portion 40B. The outer diameter dimension X is set larger.

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

As described above, the valve unit 12 composed of the seat valve 40, the guide block 14, the sleeve 28, the shaft 20, the plunger 24 and the like is a single unit component.
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 structure, 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 with the cup seal 44 mounted thereon is press-fitted into the press-fitting hole 15 of the guide block 14 and is fixed. Thus, the valve unit 12 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 the periphery of the valve unit 12 (sleeve 28) attached to the housing 46 is further fixed. 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 electromagnetic valve device 10, the main press-fitting portion 40A and the preliminary press-fitting portion 40B are provided at the press-fitting fixed portion of the seat valve 40 into the guide block 14 (press-fitting hole 15).
When the seat valve 40 is press-fitted and fixed to the guide block 14, the preliminary press-fitting portion 40B is preliminarily press-fitted into the press-fitting hole 15 prior to the main press-fitting portion 40A. Is press-fitted and fixed in the press-fitting hole 15.

Therefore, even if the dimensional accuracy of the inner diameter dimension Z of the press-fit hole 15 formed in the guide block 14 is slightly varied, the preliminary press-fit portion 40B of the seat valve 40 is The inner diameter dimension Z of the press-fitting hole 15 is corrected by preliminary press-fitting (automatically follows the outer diameter dimension Y of the preliminary press-fitting portion 40B),
Thereafter, the main press-fitting portion 40A is press-fitted and fixed, so that the seat valve 40 is securely press-fitted and fixed to the guide block 14 with a predetermined interference.

As described above, since the preliminary press-fitting portion 40B of the seat valve 40 is preliminarily press-fitted into the press-fitting hole 15 of the guide block 14, the inner diameter dimension Z of the press-fitting hole 15 is corrected. To automatically follow the outer diameter dimension Y), the outer diameter dimension X of the main press-fitting portion 40A of the seat valve 40.
If the outer diameter dimension Y (tightening margin) of the preliminary press-fitting portion 40B is appropriately set in advance, variations in the quality (press-fitting, press-fit holding force, degree of burr generation, etc.) of the press-fitting fixed portion of the seat valve 40 are suppressed. Is done.

Therefore, since the quality of the press-fitting fixed portion of the seat valve 40 is stabilized, the predetermined characteristics of the solenoid valve device 10 do not vary in each solenoid valve device 10.

The main valve 40A is inserted into the seat valve 40.
And only the preliminary press-fitting portion 40B is provided.
There is no increase in the number of parts or deterioration in assemblability.

As described above, according to the solenoid valve device 10 and the method of manufacturing the same according to the present embodiment, the seat valve 40 fixed to the guide block 14 is press-fitted without increasing the number of parts or deteriorating the assembling property. The press-fit quality of the fixed part is stable, and the characteristics do not vary.

In the above embodiment, the guide block 14 is overlapped with the sleeve 28 so that the press-fit portion 32
After the seat valve 40 is press-fitted and fixed, the seat valve 40 is press-fitted into the guide block 14 and fixed. However, the present invention is not limited to this. First, the seat valve 40 is press-fitted into the guide block 14 and then fixed. The guide block 14 may be fixed to the sleeve 28. 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.

In the above embodiment, the normally closed electromagnetic valve device 10 in which the valve body 22 normally closes the flow path 42 is used.
However, 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 device 10 built in the ABS actuator provided in the ABS of the vehicle has been described. However, the present invention is not limited to this, and the electromagnetic valve device other than the ABS actuator may be used. Of course, it is also possible to apply.

[0051]

As described above, the method of manufacturing the solenoid valve device and the solenoid valve device according to the present invention provide a valve seat forming member (fixed to the body) without increasing the number of parts or deteriorating the assemblability. This has an excellent effect that the press-fit quality of the press-fit fixed portion of the seat valve) is stable 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 cross-sectional view showing a correspondence relationship between a guide block and a seat valve of the electromagnetic valve device shown in FIG. 1, and before the two are press-fitted and fixed.

[Explanation of symbols]

 Reference Signs List 10 solenoid valve device 12 valve unit 14 guide block (body) 15 press-in hole 16 valve chamber 20 shaft 22 valve body 24 plunger 28 sleeve 34 core 40 seat valve (valve seat forming body) 40A main press-in portion 40B preliminary press-in portion 42 flow path 46 Housing

Claims (2)

[Claims] 1. A body in which a valve chamber is formed, a sleeve formed in a bottomed cylindrical shape, a core is fixed, and an opening end side is integrally fixed to the body; and a sleeve is movable in the sleeve. A plunger disposed in the plunger, a valve element integrally provided in the plunger to open and close a flow path, and positioned to face the valve element and press-fitted and fixed to the body with a predetermined interference, and the valve element is A method for manufacturing an electromagnetic valve device, comprising: a valve seat forming body that forms a valve seat to be seated; and a magnetic force applying unit that is provided on an outer periphery of the sleeve and applies a magnetic force between the core and the plunger. A press-fit portion fixed to the body by press-fitting the body with a predetermined interference,
A preliminary press-fitting part which is located at the end of the main press-fitting part in the front end in the press-fitting direction and is set to a smaller interference than a predetermined interference of the main press-fitting part. When press-fitting and fixing, the main press-fitting portion is press-fitted and fixed to the body while the preliminary press-fitting portion precedes the main press-fitting portion and is preliminarily press-fitted into the body. Manufacturing method. 2. A body in which a valve chamber is formed, a sleeve formed in a bottomed cylindrical shape, a core is fixed, and an open end side is integrally fixed to the body, and the sleeve is movable in the sleeve. A plunger disposed in the plunger, a valve element integrally provided in the plunger to open and close a flow path, and positioned to face the valve element and press-fitted and fixed to the body with a predetermined interference, and the valve element is An electromagnetic valve device comprising: a valve seat forming body forming a seat to be seated; and magnetic force applying means provided on an outer periphery of the sleeve and applying a magnetic force between the core and the plunger. A press-fit portion fixedly press-fitted to the body with a predetermined interference, at a press-fit fixed portion to the body,
It is located at the front end side in the press-fit direction with respect to the main press-fit portion and is set to a smaller interference than a predetermined interference of the main press-fit portion, and is preliminarily press-fitted into the body prior to the main press-fit portion. And a preliminary press-fitting section.