JP3376934B2 - solenoid valve - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid valve, and more particularly to a solenoid valve in which a connector portion, a core portion and a case portion are connected.

[0002]

2. Description of the Related Art Generally, a solenoid valve is a valve operated by a magnetic field generated in a coil, in a liquid passage such as a pipe,
It controls the flow rate of gas or liquid flowing through it. The solenoid valve is mounted on, for example, a hydraulic device that performs variable bubble timing control of an internal combustion engine. At this time, the solenoid valve is fixed between the hydraulic device and the control device that controls the solenoid valve. The solenoid valve includes a mounting bracket and a connector, is fixed to the hydraulic device via the mounting bracket, and is connected to the control device via the connector.

Therefore, it is necessary for the solenoid valve mounted on a plurality of hydraulic devices having different configurations and connectable to the control device to be able to change the mounting angle of the connector with respect to the mounting bracket.

An electromagnetic valve in which the mounting angle of the mounting bracket and the connector can be changed is disclosed in, for example, Japanese Patent Laid-Open No. 10-12.
2404. As shown in FIG. 7, a solenoid housing 23 is arranged at one end of a body 22 of the solenoid valve 21. Solenoid housing 23
Is formed in a tubular shape and includes an outer tubular portion 23a, an inner tubular portion 23b, and a connecting portion 23c. Body 22 of outer cylinder portion 23a
An annular engaging groove 24 is formed on the outer peripheral surface on the side, and a connector 25 is formed on the outer surface on the side opposite to the body 22.

A mounting bracket 26 is provided around the outer peripheral surface of the body 22 on the solenoid housing 23 side. The mounting bracket 26 has a mounting bolt hole 27 and a caulking projection 29. This caulking projection 29 is
It is formed by ironing.

For the mounting position of the mounting bolt hole 27 with respect to the connector 25 in the circumferential direction, the mounting bracket 26 is attached to the body 22.
It is adjusted by rotating in the circumferential direction. Then, the mounting bracket 26 caulks the caulking projection 29 into the engaging groove 24, thereby connecting and fixing the body 22 and the solenoid housing 23.

The solenoid valve 21 is screwed by a bolt 31 into a bolt hole 28 formed in the hydraulic device 30 through the mounting bolt hole 27.

[0008]

However, the mounting bracket 26 presses the mounting bracket 26, the body 22, and the solenoid housing 23 by crimping the caulking projection 29 in the engaging groove 24.

Therefore, the mounting bracket 26 and the body 22
The solenoid housing 23 is only fixed by the frictional force of the respective joint surfaces in the circumferential direction. As a result, the mounting bracket 26, the body 2
2 and the solenoid housing 23 are not strong in the circumferential direction, and there is a risk that they will rotate and shift from each other.

When the caulking projection 29 is caulked in the engaging groove 24, it is necessary to accurately adjust the mounting positions of the mounting bracket 26, the body 22 and the solenoid housing 23. Since this is performed by using an adjusting device for obtaining the accuracy and an assembling device for preventing the accuracy from being shifted when caulking, the efficiency of assembly is reduced.

Further, the solenoid housing 23 is formed in a cylindrical shape, and has an outer cylinder portion 23a, an inner cylinder portion 23b and a connecting portion 23.
c is formed. For this reason, it is difficult to form only by pressing, and cutting is required to improve the accuracy of each part.

Therefore, the processing cost increases. In order to reduce the processing cost, it is necessary to reduce the cutting work. An object of the present invention is to provide an electromagnetic valve in which the mounting bracket has sufficient strength in the circumferential direction with respect to the connector, the mounting position can be easily adjusted, and the processing cost can be reduced. is there.

[0013]

In order to solve the above-mentioned problems, the invention according to claim 1 is an electromagnetic system comprising a valve body and a valve drive section for operating a spool valve provided in the valve body. In the valve, in the valve drive portion, a flange portion formed to extend in a radial direction from a cylindrical core is in contact with the valve body, and a first engaging portion is formed on the flange portion,
The mounting bracket includes a core portion extending from the core portion and a tubular portion disposed outside the core portion and having a coil embedded therein. The connector portion is formed to project outward from the tubular portion, and A third engagement portion that is disposed outside the coil portion and that has a second engagement portion, and that the second engagement portion of the coil portion can engage at a plurality of different positions in the circumferential direction. And a case portion having a fourth engaging portion that engages with the first engaging portion formed in the flange portion of the core portion at a plurality of different positions in the circumferential direction and that connects the valve body. The point is to become.

According to a second aspect of the present invention, in the solenoid valve according to the first aspect, a fourth engaging portion is fitted in the first engaging portion at a right angle to a circumferential direction of the core portion. What is done is summarized.

According to a third aspect of the invention, in the solenoid valve according to the first aspect, the third engaging portion is fitted in the second engaging portion at a right angle to the circumferential direction of the coil portion. What is done is summarized.

According to the first aspect of the invention, the second engaging portion formed in the coil portion is fitted with the fourth engaging portion formed in the case portion, and the connector portion is circumferentially arranged with respect to the case portion. In, it can be arranged at a plurality of different positions.
Furthermore, the fourth engaging portion formed on the case portion is fitted to the first engaging portion formed on the core portion, and the core portion provided with the mounting bracket is arranged at a plurality of different positions in the circumferential direction with respect to the case portion. It can be installed.

Therefore, the mounting bracket can be arranged at a plurality of different positions in the circumferential direction with respect to the connector portion. According to the invention described in claim 2, the fourth engaging portion of the case portion is fitted into the first engaging portion of the core portion at a right angle to the circumferential direction of the core portion. The parts have stable strength in the circumferential direction, and there is no risk of displacement.

According to the third aspect of the invention, the third engaging portion of the case portion is fitted into the second engaging portion of the coil portion at a right angle to the circumferential direction of the coil portion. The strength of the portion and the case portion is stable in the circumferential direction, and there is no risk of displacement.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a solenoid valve embodying the present invention will be described below with reference to FIGS.

As shown in FIG. 1, the solenoid valve 1 comprises a valve body 2 and a valve drive section 3. The valve body 2 includes a body 4. A port 5 through which hydraulic oil flows in or out is formed on the outer peripheral surface of the body 4. As shown in FIG.
One end of the body 4 is closed. The other end of the body 4 is open, and the valve drive unit 3 is provided on the side surface of the body 4 on the opening side.

As shown in FIG. 3, the valve drive section 3 comprises a core section 6, a sleeve 7, a coil section 8 and a case section 9. As shown in FIGS. 2, 3 and 4 (a), the core portion 6 is made of iron, and is composed of a flange portion 6a and a core 6b. The flange portion 6a is formed in a columnar shape, and one side surface of the flange portion 6a abuts the side surface of the body 4. The outer circumference of the flange portion 6a has a radius R1. A mounting bracket 6c is formed so as to extend on the outer peripheral surface of the flange portion 6a.
A mounting hole 6d is formed at the tip of the mounting bracket 6c. A first engaging portion 6e is formed on the outer peripheral surface of the flange portion 6a. In this embodiment, the first engaging portion 6
e is a groove formed by cutting out the outer peripheral surface of the flange portion 6a,
The flange portion 6a has a width W1 in the circumferential direction, and four flange portions 6a are formed at equal angular intervals (= 90 degrees). The bottom surface of the first engagement portion 6e is formed on the circumference having a radius R2 from the central axis of the flange portion 6a. Further, the central portion of the flange portion 6a is opened, and the core 6b is formed so as to extend in the axial direction of the flange portion 6a from the periphery of the opening. The core 6b is formed in a cylinder having an outer diameter R3 and a length L1. A sleeve 7 is arranged outside the core 6b.

The sleeve 7 is formed in a cylindrical shape and has a large diameter portion 7
a, a small diameter portion 7b and a connecting portion 7c. Large diameter part 7
a is formed into a cylinder having an inner diameter R3, an outer diameter R4 and a length L1. Further, the small diameter portion 7b is formed in a cylinder having an outer diameter R5 and a length L2. Further, a connecting portion 7c is formed between the large diameter portion 7a and the small diameter portion 7b. The connecting portion 7c is formed in a cylinder having a length L3. The sleeve 7 has the inner peripheral surface of the large diameter portion 7a fixed to the outer peripheral surface of the core 6b by press fitting or the like coaxially with the core 6b. A coil portion 8 is arranged outside the sleeve 7.

As shown in FIGS. 2, 3 and 5 (a),
The coil portion 8 includes a tubular portion 8a and a connector portion 8b. The coil portion 8 is made of a resin material. Tube part 8
a is an inner diameter R4, an outer diameter R6 (= 2 × R2) and a length L4
(= L1 + L2 + L3) is formed into a cylinder, and the sleeve 7
Is fixed to the outer peripheral surface of the large diameter portion 7a by press fitting or the like coaxially with the sleeve 7. A coil 8c is embedded in the tubular portion 8a. The coil 8c is adapted to generate a magnetic field in the space inside the coil 8c when a voltage is supplied. A connector portion 8b is formed on one end of the outer peripheral surface of the tubular portion 8a.

The connector portion 8b comprises a supporting portion 8d and a connecting portion 8e. The support portion 8d is formed so as to extend from the outer peripheral surface of the tubular portion 8a in the shape of a prism in the radial direction of the tubular portion 8a.
It has a length L5 in the axial direction of a and a width W2 in the circumferential direction on the circumference of a radius R2 from the central axis. A connecting portion 8e is formed on the upper portion of the supporting portion 8d.

The connecting portion 8e is formed so as to extend in the axial direction of the tubular portion 8a, and the base end of the connecting portion 8e projects from the side surface of the tubular portion 8a. The connecting portion 8e has a recess 8f, and two connector pins 8g are provided in the recess 8f. These connector pins 8g are connected to the coil 8c at their base ends and connected to a power source (not shown) at their tips to supply a voltage to the coil 8c.

On the lower surface of the connecting portion 8e, the engaging projection 8
h is formed so as to extend in the axial direction of the tubular portion 8a. Figure 5
As shown in (a), the lower end of the engaging projection 8h has a cylindrical portion 8a.
It is formed on the circumference of radius R2 from the central axis of, and the second engaging portion 8i is formed in the center thereof. In the present embodiment, the second engaging portion 8i is formed in a V-shape in the axial direction of the tubular portion 8a. The bottom of the second engaging portion 8i is formed on the circumference having a radius R1 / 2 from the central axis. Also, the engaging protrusion 8
h has a width W3 (≤W2) on the circumference of radius R1 / 2. And the case part 9 is externally fitted to the coil part 8 formed in this way.

As shown in FIGS. 2, 3 and 5, the case portion 9 comprises a connecting portion 9a, an outer tubular portion 9b and an inner tubular portion 9c. The connecting portion 9a is formed in a disc shape, and has an outer diameter R1 and a length L6 in the axial direction thereof. A third engaging portion 9d is formed on the outer peripheral surface of the connecting portion 9a. In the present embodiment, the third engagement portion 9d is formed as a protrusion.

The third engaging portion 9d has an interval L7 (15 degrees in center angle) on the circumference of a radius R2 from the central axis of the connecting portion 9a.
Seven inverted V shapes are formed for each. In addition, the third engaging portion 9
d is width W4 (= W2 + 6 × L7) on the circumference of radius R2
have. Then, the protrusion formed at the center of the third engaging portion 9d is fitted to the second engaging portion 8i. Further, as shown in FIG. 5 (b), the next protrusion on the right side can also be fitted to the second engaging portion 8i. In this case, the position of the connector portion 8b is shown in FIG. 5 (a). It moves to the right by 15 degrees from the position of the connector portion 8b. That is, the connector portion 8b is separated from the case portion 9 by 15 degrees in the circumferential direction.
It can take different positions.

Further, an outer cylinder portion 9b is provided on the peripheral portion of the connecting portion 9a.
Are formed in the axial direction of the connecting portion 9a from both sides of the third engaging portion 9d. The outer cylinder portion 9b has an inner diameter R6 (= 2 × R2),
It is composed of two opposing cylindrical pieces 9e formed in a cylindrical shape having an outer diameter R1 and a length L4 (= L1 + L2 + L3).
These tubular pieces 9e have narrow portions 9f and wide portions 9g.

As shown in FIG. 1, the narrow portion 9f has a length L8 (> L5) in the axial direction of the connecting portion, and the outer peripheral surface thereof has the same width in the circumferential direction. The wide portion 9g is formed so as to widen toward the end. A fourth engagement portion 9h is formed so as to extend from the end of the wide portion 9g. In the present embodiment, the fourth
The engaging portion 9h is formed as a protrusion and has a width W1 in the circumferential direction,
Four pieces are formed at equal angular intervals (= 90 degrees). Then, as shown in FIG. 4A, each of the fourth engaging portions 9h is fitted into each of the first engaging portions 6e formed in the core portion 6, and is caulked to the body 4. At this time,
As shown in (b), the core portion 6 can be rotated rightward by 90 degrees, and the fourth engaging portions 9h can be fitted into the first engaging portions 6e and caulked. That is, the mounting bracket 6c can take four different positions in the circumferential direction of the case portion 9 every 90 degrees.

Therefore, the connector portion 8b can be arranged at six different positions at intervals of 15 degrees with respect to the case portion 9, and the mounting bracket 6c can be arranged at intervals of 90 degrees with respect to the case portion 9. Therefore, the connector portions 8b can be arranged on the mounting bracket 6c at intervals of 15 degrees at 24 (= 4 × 6) different positions in the circumferential direction.

Furthermore, as shown in FIGS. 2, 3 and 5, the central portion of the connecting portion 9a is open, and the inner cylindrical portion 9c is formed so as to extend in the axial direction of the connecting portion 9a from the periphery of the opening. ing. The inner cylindrical portion 9c is formed in a cylindrical shape and has an inner diameter R5 and an outer diameter R.
4 and an axial length L2. The inner cylindrical portion 9c is
The sleeve 7 is fixed to the outer peripheral surface of the small diameter portion 7b by press fitting or the like.

Further, the outer shape of the case portion 9 is formed by punching from an iron plate material. Further, the case portion 9 has an inner cylindrical portion 9c formed by drawing. Further, in the case portion 9, both sides of the inner tubular portion 9c are bent to form an outer tubular portion 9b.

The space constituted by the body 4, the core 6b and the sleeve 7 is filled with hydraulic oil (not shown), and the spool valve 10 is arranged so as to be movable in the axial direction of the body 4. A valve body 11 is formed on the spool valve 10, contacts the inner peripheral surface of the body 4, and moves in the axial direction to open and close each port 5. Left end of spool valve 10 and body 4
A spring 12 is arranged between them. The spring 12 biases the spool valve 10 in the axial direction.

A drive shaft 13 is provided on the spool valve 10 and is supported by a bearing 14. As shown in FIG. 6, this bearing 14 is formed in a cylindrical shape, and its outer diameter is the same as the inner diameter of the core 6b. A shaft hole 14a is formed in the center of the bearing 14, and a recess 14b is formed in the outer peripheral surface in the axial direction. In the present embodiment, the recess 14b is
Five bearings 14 are formed in an arc shape at equal angular intervals in the circumferential direction. The bearing 14 is fixed to the inner peripheral surface of the core 6b.

Therefore, as shown in FIG. 2, a space S is formed between the inner peripheral surface of the core 6b and the outer peripheral surface of the bearing 14. The bearing 14 is made of a sintered alloy or the like. The drive shaft 13 has a plunger 15 at its end. The plunger 15 is provided with balls 16 rollably in a plurality of grooves 15a formed on the outer peripheral surface thereof. The plunger 15 is in sliding contact with the inner peripheral surface of the small diameter portion 7b of the sleeve 7 via the ball 16.

Therefore, when a voltage is supplied to the coil 8c, the plunger 15 moves in the axial direction by the generated magnetic field and stops at a position balanced with the spring force. According to the solenoid valve 1 of the present embodiment, the following features can be obtained.

(1) In this embodiment, the coil portion 8 having the connector portion 8b is provided in the case portion 9, the second engaging portion 8i is provided in the third portion.
6 at equal angular intervals (= 15 degrees) by engaging the engaging parts 9d.
It can be arranged at different positions in the circumferential direction. Further, the core portion 6 provided with the mounting bracket 6c is attached to the case portion 9
The fourth engaging portion 9h can be fitted to the first engaging portion 6e and can be arranged at four different positions in the circumferential direction at equal angular intervals (= 90 degrees).

Therefore, the mounting bracket 6c is arranged at an equal angular interval (= 15 degrees) with respect to the connector portion 8b at 24 (= 4 ×).
6) It can be arranged at different positions in the circumferential direction. Further, since the mounting positions are determined only by fitting the coil part 8 and the case part 9 and the core part 6 and the case part 9 to each other, it is not necessary to accurately adjust the mounting positions of the mounting bracket 6c and the connector part 8b. As a result, the assembly of the solenoid valve 1 becomes extremely easy.

(2) In this embodiment, the fourth engaging portion 9h of the case portion 9 is fitted into the first engaging portion 6e of the core portion 6 at a right angle to the circumferential direction of the core 6. The strength of the core portion 6 and the case portion 9 is stable in the circumferential direction, and there is no risk of displacement. In addition, the second engaging portion 8i also includes the third engaging portion 9d.
Are fitted at right angles to the circumferential direction of the coil portion 8, so that the coil portion 8 and the case portion 9 have stable strength in the circumferential direction and there is no risk of displacement.

(3) In the present embodiment, the case portion 9 is formed of an iron plate material, and it is not necessary to perform a cutting process.
The processing cost can be reduced. (4) In the present embodiment, the core portion 6 does not have the caulking projection 29 of the conventional mounting bracket 26, so that ironing is not necessary. As a result, the processing cost can be reduced.

(5) In this embodiment, since the recess 14b is formed on the outer peripheral surface of the bearing 14, a space S is formed between the inner peripheral surface of the core 6b and the bearing 14. Since the foreign matter contained in the hydraulic oil can pass through this space S, the probability of entering the shaft hole 14a is reduced. As a result, the shaft hole 14
The risk of damaging a is reduced.

The embodiment of the present invention may be modified as follows. The four first engaging portions 6e are formed at equal angular intervals, but any number of these first engaging portions 6e may be formed at arbitrary intervals.

Although the second engaging portion 8i is formed in the groove, it may be formed in the protrusion. In this case, the third engaging portion 9d is formed in the groove. Although four fourth engaging portions 9h are formed at equal angular intervals, any number of these fourth engaging portions 9h may be formed at arbitrary intervals.

Also in this case, the same features as those described in the above embodiment can be obtained. Next, technical ideas other than the invention described in the claims that can be grasped from the embodiment and other examples will be described below together with their effects.

(1) In the solenoid valve according to claim 1,
The case part is a solenoid valve characterized by being formed from a plate material. Therefore, according to the solenoid valve described in (1), the processing cost can be reduced.

(2) In the solenoid valve according to claim 1,
An electromagnetic valve characterized in that the core portion is not provided with a caulking projection for engaging with the case portion. Therefore, according to the solenoid valve described in (2), the processing cost can be reduced.

[0048]

As described in detail above, according to the invention described in claim 1, the mounting positions of the mounting bracket and the connector portion can be easily adjusted.

According to the second and third aspects of the invention, in addition to the effect of the first aspect of the invention, the strength of the mounting bracket and the connector portion is stable in the circumferential direction, and there is no risk of displacement.

[Brief description of drawings]

FIG. 1 is a front view of a solenoid valve according to this embodiment.

FIG. 2 is a sectional view of the solenoid valve.

FIG. 3 is an exploded perspective view of the valve drive unit.

FIG. 4 (a) is a side view of the solenoid valve,
(B) is a side view of the solenoid valve in which the position of a core part differs.

FIG. 5 (a) is a side view of the solenoid valve,
(B) is a side view of the solenoid valve in which the position of the connector part is different.

FIG. 6 is a front view of the bearing.

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electromagnetic valve, 2 ... Valve main body, 3 ... Valve drive part, 6 ... Core part,
6a ... Flange section, 6b ... Core, 6c ... Mounting bracket, 6e ... First engaging section, 8 ... Coil section, 8a ... Cylindrical section, 8
b ... connector part, 8c ... coil, 8i ... second engaging part, 9
... case part, 9d ... third engaging part, 9h ... fourth engaging part, 1
0 ... spool valve.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16K 27/00 F16K 31/06

Claims (3)

(57) [Claims] 1. A solenoid valve comprising a valve body and a valve drive section for operating a spool valve provided in the valve body, wherein the valve drive section is formed to extend radially from a cylindrical core. A flange portion is in contact with the valve body, a first engaging portion is formed on the flange portion, and a core portion is formed by extending a mounting bracket, and a cylinder disposed outside the core portion and having a coil embedded therein. A coil portion that has a portion, the connector portion is formed to project outward from the tubular portion, and a second engaging portion is formed in the connector portion; and a coil portion that is disposed outside the coil portion The second engaging portion has a third engaging portion capable of engaging at a plurality of different positions in the circumferential direction and is different from the first engaging portion formed in the flange portion of the core portion in the circumferential direction. Engage in position to connect the valve body Solenoid valve comprising a casing portion having a fourth engaging portion. 2. The electromagnetic valve according to claim 1, wherein a fourth engaging portion is fitted in the first engaging portion at a right angle to a circumferential direction of the core portion. valve. 3. The electromagnetic valve according to claim 1, wherein a third engaging portion is fitted in the second engaging portion at a right angle to a circumferential direction of the coil portion. valve.