JPH0211982A - Solenoid valve - Google Patents

Abstract

PURPOSE:To reduce a setting space by bending a yoke plurally along an outer circumferential surface of a solenoid valve body, and setting it to a plate. CONSTITUTION:A yoke 21 is plurally bent along an outer circumferential surface of a solenoid valve body, and its engaged part 21a is engaged with each engaged hole 20a of a plate 20. With this constitution, width of this plate 20 is reducible, therefore, a setting space can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a solenoid valve that is used, for example, in exhaust gas control or engine control of automobiles, and opens and closes a movable valve body using electromagnetic force.

[Prior Art] Figures 6 to 8 show examples of conventional solenoid valves, in which (1) is a bobbin made of synthetic resin, and (2) is a passage for fluid with the outside of the solenoid valve. first nipple, (3)
is the second nipple, (4) is the internal passageway that is the fluid passage between the first nipple (2) and the second nipple (3), and (5) is the interior of the first nipple (2). The first valve seat (6) is provided in a portion protruding toward the passage (4), and is a bobbin external connection terminal.

(8) is a fixed iron core fixed inside the bobbin (1), (
9) is a second valve seat provided on one end surface of the fixed iron core (8), (10) is a third nipple provided along the central axis direction of the fixed iron core (8), and (11) is an internal valve seat. It is provided in the passageway (4) and slides back and forth within the internal passageway (4) to alternately contact the first valve seat (5) and the second valve seat (9) to open and close the valve. It is a movable valve body, and this movable valve body (1
1) consists of an iron part (12) and a non-magnetic seal part (13) that comes into contact with the second valve seat (9).

(14) is a spring provided between the fixed core (8) and the movable valve body (11) and has a restoring force to press the movable valve body (11) against the first valve seat (5); (15) is a bobbin; (1
) is a coil wound around.

(16) is a plate provided on one side of the cylindrical solenoid valve body consisting of a fixed core (8), a movable valve body (11), a coil (15), etc., and (17) is locked to the plate (16). This is a yoke that is provided on the outer peripheral surface of the solenoid valve body and forms a magnetic circuit together with the plate (16).

In the conventional solenoid valve configured as described above, when the coil (15) is not excited, the movable valve body (11) is pressed by the spring (14) as shown in the figure, and the seal portion (13) comes into contact with the first valve seat (5), and the fluid passage between the first nipple (2) and the second nipple (3) is blocked, and the first nipple (2) and the third The nipple (10) is in communication with the nipple (10).

Here, when a signal current for an operation command is issued from a control device (not shown) external to the solenoid valve and enters the solenoid valve from the external connection terminal (6), the coil (15) is energized and the fixed iron core (8), a magnetic circuit consisting of the movable valve body (11), the plate (16) and the yoke (17) is formed, and the movable valve body (11)
) is pulled toward the fixed core (8) by an electromagnetic force that resists the restoring force of the spring (14), and the movable valve body (11) slides until it comes into contact with the second valve seat (9).

As a result, the seal portion (13) separates from the first valve seat (5), and the first nipple (2) and the second nipple (
3) It communicates with. When the signal current to the coil (15) stops, the movable valve body (11) returns to the state shown in Fig. 8, and the fluid passage between the first nipple (2) and the second nipple (3) is closed. The second nipple (3) and the third nipple (10) are communicated with each other.

[Problems to be Solved by the Invention] In the conventional solenoid valve configured as described above, the locking portion (1) a) of the yoke (17) is bent into the locking hole (16a) of the plate (16). The yoke (
17) has a U-shaped cross section, and the locking holes (16a) of the rectangular plate (16) are located at its four corners, so the width W of the plate (18) increases. When multiple solenoid valves are installed as shown in FIG. 9, there is a problem in that the overall width W increases significantly.

The present invention was made to solve the above-mentioned problems, and an object of the present invention is to obtain a solenoid valve that can reduce the installation space by reducing the width of the plate.

[Means for Solving the Problems] In a solenoid valve according to the present invention, a yoke is bent into a plurality of pieces along the outer peripheral surface of a solenoid valve body and attached to a plate.

[Function] In this invention, since the yoke is bent into multiple parts along the outer peripheral surface of the solenoid valve body, the mounting position of the yoke to the plate is closer to the solenoid valve body, and the dimensions of the plate can be reduced accordingly. can.

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

1 and 3 show an embodiment of the present invention, and the same or corresponding parts as in FIGS. 6 to 9 are given the same reference numerals, and the explanation thereof will be omitted.

In the figure, (20) is a fixed iron core (8), a movable valve body (1
1), a plate provided on one side of the cylindrical solenoid valve body consisting of a coil (15), etc.;
0) and is bent into a plurality of pieces along the outer peripheral surface of the solenoid valve body.

In the solenoid valve configured as above, the yoke (2
1) is bent into multiple pieces along the outer peripheral surface of the solenoid valve body,
Each of the locking portions (21a) is bent into each of the locking holes (20a) of the plate (20) and is locked to the plate (20). Since they are close to each other, the width W of the plate (20) can be reduced accordingly, and when multiple electromagnetic valves are installed as shown in FIG. 3, the total width W can be reduced.

In addition, since the locking hole (20a) is located radially around the solenoid valve body, the locking hole (20a) is located at the locking portion (21).
In the work of locking a), the distance between the second valve seat (9) and the movable valve body (11) does not easily change, so the stroke of the movable valve body (11) becomes constant, improving sealing performance. The operating voltage, ventilation resistance, etc. will not become unstable.

Note that FIGS. 4 and 5 show a second embodiment of the present invention, in which the bending direction of the locking part (21a) and the four corners of the plate (20) are chamfered compared to the first embodiment. The points are different. In addition, in the above embodiment, the plate (20)
A locking hole (20a) is provided in the yoke (21), and a locking portion (20a) is provided in the yoke (21).
21a), but the plate may be provided with a locking portion and the yoke may be provided with a locking hole.Furthermore, in each of the above embodiments, a locking portion that locks the locking portion in the locking hole is provided. Although the stopping means has been described, the yoke may be attached to the plate by, for example, welding.

[Effects of the Invention] As explained above, in the solenoid valve of the present invention, the yoke is bent into multiple pieces along the outer peripheral surface of the solenoid valve body and attached to the plate, so the width of the plate can be reduced. This has the effect of reducing the installation space.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a first embodiment of the invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a plan view showing how the solenoid valve shown in FIG. 1 is used, and FIG. A plan view showing a second embodiment of the invention, FIG. 5 is a front view of FIG. 4, FIG. 6 is a plan view showing an example of a conventional solenoid valve, and FIG. 7 is a front view of FIG. 6. 8th
The figure is a cross-sectional view taken along the line ■--■ in FIG. 6, and FIG. 9 is a plan view showing how the solenoid valve in FIG. 6 is used. In the figure, (8) is a fixed core, (11) is a movable valve body,
(15) is a coil, (20) is a plate, (20a) is a locking hole, (21) is a yoke, and (21a) is a locking portion. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A plate provided on one side of a cylindrical electromagnetic valve body consisting of a fixed core, a movable valve body, a coil, etc., and a yoke that is provided on the outer periphery of the electromagnetic valve body and forms a magnetic circuit together with the plate. In the solenoid valve that opens and closes the movable valve body by electromagnetic force, the yoke is bent into a plurality of pieces along the outer peripheral surface of the solenoid valve body and attached to the plate. solenoid valve.