JPH0814340B2 - solenoid valve - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electromagnetic valve that is used, for example, for exhaust gas control and engine control of automobiles and that opens and closes a movable valve element by electromagnetic force.

[Prior Art] FIGS. 6 to 8 show an example of a conventional solenoid valve. In the drawings, (1) is a bobbin made of synthetic resin, and (2) is a fluid passage to the outside of the solenoid valve. First nipple,
(3) is a second nipple, (4) is an internal passage which is a fluid passage between the first nipple (2) and the second nipple (3), and (5) is the first nipple (2 ), A first valve seat provided in a portion protruding toward the inner passage (4),
(6) 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 face 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 By being reciprocally slid in the internal passage (4) provided in the internal passage (4), the first valve seat (5) and the second valve seat (9) are alternately contacted to open and close the valve. This is the movable valve body to perform, this movable valve body (11)
Comprises an iron part (12) and a non-magnetic seal part (13) that abuts on the second valve seat (9). The movable valve body (1) is provided between the fixed iron core (8) and the movable valve body (11).
A spring having a restoring force that presses 1) against the first valve seat (5), and (15) is a coil wound around the bobbin (1).

(16) is a plate provided on one side of a cylindrical solenoid valve body composed of a fixed iron core (8), a movable valve body (11), a coil (15), etc., and (17) is locked to the plate (16). A yoke that is provided on the outer peripheral surface of the solenoid valve body and constitutes 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 element (11) is pressed by the spring (14) as shown in the figure, and the seal portion (13) Contact with the first valve seat (5) to block the fluid passage between the first nipple (2) and the second nipple (3), and also the first nipple (2) and the third nipple (2). It is communicated with the nipple (10).

Here, when a signal current of an operation command is issued from a control device (not shown) outside the solenoid valve and enters the solenoid valve from the external connection terminal (6), the coil (15) is excited and the fixed core. A magnetic circuit composed of (8), the movable valve body (11), the plate (16) and the yoke (17) is formed, and the movable valve body (11) is fixed by an electromagnetic force against the restoring force of the spring (14). 8) and is slid until the movable valve body (11) comes into contact with the second valve seat (9).

As a result, the seal portion (13) is separated from the first valve seat (5), and the first nipple (2) and the second nipple (3) communicate with each other. When the signal current to the coil (15) is stopped, the movable valve body (11) returns to the state shown in FIG. 8 again, and the fluid passages of the first nipple (2) and the second nipple (3) are separated. The second nipple (3) and the third nipple (10) are cut off and communicate with each other.

[Problems to be Solved by the Invention] In the conventional solenoid valve configured as described above, the engaging portion (17a) of the yoke (17) is bent in the engaging hole (16a) of the plate (16). Although it is stopped, the yoke (17) has a U-shaped cross section, and the rectangular plate (1
Since the locking holes (16a) of 6) are located at the four corners, the width w of the plate (16) becomes large. As shown in FIG. There is a problem that the increase of W is remarkable.

The present invention has been made to solve the above problems, by reducing the width of the plate,
The purpose is to obtain a solenoid valve that can reduce the mounting space.

[Means for Solving the Problems] A solenoid valve according to the present invention comprises a cylindrical solenoid valve body, and a magnetic material that is provided on one end face of the solenoid valve body and forms a magnetic path in substantially the same shape as this end face. A plate, a yoke made of a magnetic material that is provided on the outer wall of the solenoid valve body by bending it along the circumferential direction to form a magnetic path with the plate, and a plurality of tips provided at the end of the yoke. A locking portion that is bent in the direction of the central axis of the solenoid valve body and locks the outer periphery of the plate.

[Operation] In the present invention, since the yoke is bent in plural along the outer peripheral surface of the solenoid valve body, the mounting position of the yoke on the plate approaches the solenoid valve body, and the size of the plate can be reduced accordingly. it can.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
FIG. 3 and FIG. 3 show an embodiment of the present invention.
The same or corresponding parts as those in FIGS. 9 to 9 are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, (20) is a fixed iron core (8) and a movable valve body (1
1), a plate provided on one side surface of a cylindrical solenoid valve body composed of a coil (15), etc., (21) is locked to the plate (20), and a plurality of plates are provided along the outer peripheral surface of the solenoid valve body. It is a bent yoke.

In the solenoid valve configured as described above, the yoke (21) is bent in plural along the outer peripheral surface of the solenoid valve main body, and each locking portion (21a) of the yoke (21) is associated with each engagement member of the plate (20). It is bent to the stop hole (20a) and locked to the plate (20), but each locking part (21a) is close to the solenoid valve body, and the width w of the plate (20) should be reduced accordingly. Therefore, when the solenoid valves are multiply provided as shown in FIG. 3, the overall width W can be reduced.

Further, since the locking hole (20a) is radially arranged around the electromagnetic valve body, in the work of locking the locking portion (21a) in the locking hole (20a), the second valve seat ( The distance between the movable valve body (11) and the movable valve body (11) is unlikely to fluctuate, so the stroke of the movable valve body (11) becomes constant, and the sealing performance, operating voltage, ventilation resistance, etc. may become unstable. Absent.

4 and 5 show a second embodiment of the present invention, which is chamfered in the bending direction of the engaging portion (21a) and at the four corners of the plate (20) in the first embodiment. The points are different. Further, in the above embodiment, the case where the plate (20) is provided with the locking hole (20a) and the yoke (21) is provided with the locking portion (21a) has been described. However, the plate is provided with the locking portion (21a). A locking hole may be provided. Further, in each of the above embodiments, the locking means for locking the locking portion in the locking hole has been described, but the yoke may be attached to the plate by welding, for example.

[Effects of the Invention] As described above, the solenoid valve of the present invention includes a cylindrical solenoid valve body, and a magnetic material that is provided on one end surface of the solenoid valve body and forms a magnetic path in substantially the same shape as this end surface. A plate made of magnetic material, a yoke made of a magnetic material that is provided on the outer wall of the solenoid valve body by bending it in the circumferential direction to form a magnetic path with the plate, and a plurality of tips provided at the end of the yoke. Has a locking portion that is bent in the direction of the central axis of the solenoid valve body and locks the outer periphery of the plate, so that the width of the plate can be reduced and the mounting space can be reduced. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a plan view showing a usage mode of the solenoid valve of FIG. 1, and FIG. A plan view showing a second embodiment of the present 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. 8th
6 is a sectional view taken along line VIII-VIII in FIG. 6, and FIG.
It is a top view which shows the usage mode of the solenoid valve of a figure. In the figure, (8) is a fixed iron core, (11) is a movable valve body,
Reference numeral (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] 1. A cylindrical solenoid valve main body, a plate made of a magnetic material which is provided on one end face of the solenoid valve main body and forms a magnetic path in substantially the same shape as this end face, and a circular cylinder on the outer wall of the solenoid valve main body. A yoke made of a magnetic material that is bent in a plurality along the circumferential direction and forms a magnetic path with the plate, and a plurality of tips provided at the ends of the yoke and the tips are bent in the direction of the central axis of the solenoid valve body. And a locking portion that locks the outer periphery of the plate.