JPH0674358A - Fluid control valve - Google Patents

Abstract

PURPOSE:To miniaturize a device by rotating a ring member through a pair of cam grooves of holding a ball interposed, and accumulating energy in a spiral spring so as to close a valve by utilizing accumulated energetic force of the spring, when a movable core as a valve part is attracted by electrifying a solenoid coil. CONSTITUTION:When a case 1, concurrently serving as a fixed core, is energized by electrifying a solenoid coil 2, a movable core 3 rises with a ring member 5 in the case 1. Here in the movable core 3, action of the second cam groove 5A of the ring member 5, ball 6 and the first cam groove 4A of a guide member 4 is received, and a flow path 3A is rotated to a position of communicating with a gate port 8A of a cover 8, against energizing force of a spiral spring 7, to accumulate energy therein. Thereafter, in the case of interrupting the flow path 3A from a condition of communicating with gate ports 1A, 8A, when electrification is stopped to the solenoid coil 2, the movable core 3 is rotated in a reverse direction and also lowered down by energetic force accumulated in the spiral spring 7, and the flow path 3A is brought into press contact with a seal member 9 and closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a miniaturized fluid control valve.

[0002]

2. Description of the Related Art As a conventional fluid control valve, for example, the one described in Japanese Patent Publication No. 60-24352 is known. The proportional flow rate control valve device described in this publication is driven by an electromagnetic coil, a fixed iron core excited by the electromagnetic coil, a movable iron core attracted by the excitation of the fixed iron core, and an attracting operation of the movable iron core. A valve portion is provided, and the flow of the fluid is controlled by driving the valve portion. The proportional flow rate control valve device includes a drive source part in which the electromagnetic coil, the fixed iron core and the movable iron core are housed in a case and the like, and the valve part connected to the drive source part to control a fluid. ing.

[0003]

However, in the case of the proportional flow rate control valve device described in the above publication, since the valve portion is formed independently of the drive source portion, the drive source portion and the valve portion are However, there is a problem that each device occupies its own exclusive space and the device itself becomes large.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a fluid control valve capable of reducing the size of the apparatus and reducing the number of parts.

[0005]

A fluid control valve according to the present invention includes a case having a fluid inlet / outlet and integrated with a fixed iron core, an electromagnetic coil housed in the case, and a shaft of the electromagnetic coil. A movable core disposed in the core hole and attracted to the fixed core when the electromagnetic coil is energized, and a circumferential cam groove disposed at the lower end of the electromagnetic coil so as to surround the movable core. A ring member having a guide member and a second cam groove paired with the first cam groove of the guide member and fixed to the lower end of the movable iron core, and between the cam grooves of both the ring member and the guide member. A rotatably interposed ball and a mainspring spring in which the ring member for accommodating the ball is sequentially charged by rotating according to the first cam groove via the ball in accordance with the suction operation of the movable iron core. Be prepared and , In the above movable iron core flow path communicating the doorway is formed in the axial direction, when no energization of the electromagnetic coil is one which is configured to shut off the flow path by the biasing force of the spiral spring.

[0006]

According to the present invention, when the electromagnetic coil is energized in the case, the fixed core is excited and the movable core is attracted,
Along with this suction operation, the movable iron core receives the action of the ring member, the guide member, and the balls interposed between them to rotate while resisting the urging force of the mainspring and rise to open the flow path of the movable iron core. When the electromagnetic coil is de-energized, the movable iron core is rotated and lowered by the urging force of the mainspring to shut off the flow path.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in FIGS. In each of the drawings, FIG. 1 is a view showing an embodiment of the fluid control valve of the present invention, a sectional view showing a state in which the flow path of the movable core is blocked, and FIG. 2 shows the fluid control valve shown in FIG. FIG. 3 is a sectional view showing a state where the flow path of the movable iron core is opened, and FIG. 3 is a view showing a cam mechanism for rotationally guiding the movable iron core of the fluid control valve shown in FIG. 4 is a diagram showing the cam mechanism shown in FIG. 2, and is a circumferential sectional view showing a state in which the flow path is blocked.

The fluid control valve of this embodiment is shown in FIGS.
As shown in FIG. 1, a case 1 having a fluid inlet / outlet port 1A and integrated with a fixed iron core, an electromagnetic coil 2 housed in the case 1, and a shaft core hole of the electromagnetic coil 2 can be moved up and down. A movable iron core 3 which is arranged and is attracted to the fixed iron core when the electromagnetic coil is energized, and a first cam groove 4A which is arranged at the lower end of the electromagnetic coil 2 and surrounds the movable iron core 3 in the circumferential direction. A plurality of guide members 4 formed and a second cam groove 5A paired with the first cam groove 4A of the guide member 4.
And a ring member 5 fixed to the lower surface of the movable iron core 3, and a ball 6 rotatably interposed between the cam grooves 5A and 4A of both the ring member 5 and the guide member 4.
Then, the ring spring 5 for accommodating the balls 6 rotates in accordance with the first cam groove 4A of the guide member 4 in accordance with the suction operation of the movable iron core 3, and the spring spring 7 is sequentially charged.
And is configured.

Further, the movable iron core 3 is provided with the doorway 1A.
3A is formed in the axial direction, and the movable iron core 3 is shown in FIG. 1 while rotating in the opposite direction to the above-mentioned case by the biasing force of the mainspring 7 when the electromagnetic coil 2 is not energized. The flow path 3A is configured to descend to the shut-off state. The flow passage 3A is formed so as to pass through the shaft core from the upper end of the movable iron core 3 to the middle in the axial direction, and is inclined from the middle to the lower end and opens near the entrance / exit 8A of the cover 8. Is formed. When the flow path 3A is blocked, the movable iron core 3 is pressed by the seal member 9 arranged in the inner surface of the cover 8 near the inlet / outlet 8A, and the flow path 3A is blocked by the seal member 9. Is configured.

The guide member 4 constituting the cam mechanism for rotationally guiding the movable iron core 3 is a ring-shaped member fixed so as to cover the lower surface of the electromagnetic coil 2, and its first cam groove 4A is As shown in FIG. 3, it is formed as a groove that gradually becomes deeper to the right in the circumferential direction of the lower surface thereof. Further, the second cam groove 5A of the ring member 5 paired with the first cam groove 4A of the guide member 4 is the first cam groove 4A.
Is formed on the upper surface as a groove that gradually deepens in the opposite direction (to the left), and its circumferential length is the same as the circumferential length of the first cam groove 4A. The balls 6 interposed between the cam grooves 4A and 5A are, as shown in FIG. 3, the cam grooves 4A and 5A when the flow path 3A of the movable iron core 3 is blocked by the seal member 9. The guide member 4 and the ring member 5 are located at the shallowest position, and the distance between the guide member 4 and the ring member 5 is maximized.
4 is located at the open end, as shown in FIG. 4, the gap between the guide member 4 and the ring member 5 is smallest at the deepest portions of the cam grooves 4A and 5A, and the electromagnetic coil 2 3 causes the ring member 5 to rotate in the direction shown by the arrow in FIG. 3 in accordance with the rotation of the movable iron core 3 to be in the state shown in FIG. 4, and conversely, by deenergizing the electromagnetic coil 2. The ring member 5 is configured to rotate in the direction shown by the arrow in FIG. 4 in accordance with the rotation of the movable iron core 3 to be in the state shown in FIG.

Next, the operation will be described. First, a case where the inlet / outlet port 1A of the case 1 and the inlet / outlet port 8A of the cover 8 are communicated with each other to flow a fluid will be described. When the electromagnetic coil 2 is energized, the electromagnetic coil 2 excites the case 1 which also functions as a fixed iron core. As a result, the movable iron core 3 is attracted to the case 1 from the state shown in FIG. 1 and gradually rises in the case 1 together with the ring member 5, and at this time, the movable iron core 3
Is actuated by the second cam groove 5A of the ring member 5, the ball 6 and the first cam groove 4A of the guide member 4 and the mainspring 7
The flow passage 3A is made to approach the inlet / outlet port 8A of the cover 8 while rotating against the urging force of the cover 8, and the inlet / outlet port 1A of the case 1 and the inlet / outlet port 8A of the cover 8 are communicated with each other to allow the fluid to flow. . Next, the case of shutting off the flow path 3A will be described. When the energization of the electromagnetic coil 2 is stopped, the excited state of the case 1 is deenergized and the movable iron core 3 obtains the biasing force of the mainspring 7, which is different from the above case. It rotates in the opposite direction and begins to descend. When the movable iron core 3 descends and the flow path 3A reaches the seal member 9, the seal member 9
Thus, the flow path 3A is closed to block the flow of fluid between the inlet / outlet port 1A of the case 1 and the inlet / outlet port 8A of the cover 8.

As described above, according to this embodiment, the flow path 3A is provided in the movable iron core 3 and the movable iron core 3 itself is used as a valve for controlling the flow of fluid. It is not necessary to provide the outside of the case 1 separately from the case 1, and the device can be made compact,
Therefore, the number of parts can be reduced.

Needless to say, the present invention is not limited to the above embodiment.

[0014]

As described above, according to the present invention, since the movable iron core is used as the valve portion for controlling the fluid, it is possible to provide a fluid control valve capable of downsizing the device and reducing the number of parts. You can

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of a fluid control valve of the present invention and is a cross-sectional view showing a state in which a flow path of a movable core is blocked.

FIG. 2 is a view showing the fluid control valve shown in FIG. 1, and is a cross-sectional view showing a state in which a flow path of a movable iron core is opened.

3 is a view showing a cam mechanism for rotationally guiding a movable iron core of the fluid control valve shown in FIG. 1, and is a circumferential cross-sectional view showing a state in which a flow path is opened.

FIG. 4 is a view showing the cam mechanism shown in FIG. 3, and is a circumferential sectional view showing a state in which a flow path is blocked.

[Explanation of symbols]

 1 case 2 electromagnetic coil 3 movable iron core 3A flow path 4 guide member 4A cam groove 5 ring member 5A cam groove 6 ball 7 mainspring

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[Procedure amendment]

[Submission date] September 16, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in FIGS. In each of the drawings, FIG. 1 is a view showing an embodiment of the fluid control valve of the present invention, a sectional view showing a state in which the flow path of the movable iron core is blocked, and FIG. in the drawing, cross-sectional view showing the opened state of the flow path of the movable core, circumferential shown FIG. 3 is a diagram showing a cam mechanism for rotating guiding the movable core of the fluid control valve shown in FIG. 1, a state in which blocks the flow path 4 is a sectional view in the direction of the direction, and FIG. 4 is a view showing the cam mechanism shown in FIG. 2, and is a sectional view in the circumferential direction showing the state in which the flow path is opened .

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

The guide member 4 constituting the cam mechanism for rotationally guiding the movable iron core 3 is a ring-shaped member fixed so as to cover the lower surface of the electromagnetic coil 2, and its first cam groove 4A is As shown in FIG. 3, it is formed as a groove that gradually becomes deeper to the right in the circumferential direction of the lower surface thereof. Further, the second cam groove 5A of the ring member 5 paired with the first cam groove 4A of the guide member 4 is the first cam groove 4A.
Is formed on the upper surface as a groove that gradually deepens in the opposite direction (to the left), and its circumferential length is the same as the circumferential length of the first cam groove 4A. The balls 6 interposed between the cam grooves 4A and 5A, when the flow path 3A of the movable iron core 3 is blocked by the seal member 9, as shown in FIG. The guide member 4 and the ring member 5 are located at the shallowest position, and the distance between the guide member 4 and the ring member 5 is maximized.
4 is located at the open end, as shown in FIG. 4, the gap between the guide member 4 and the ring member 5 is smallest at the deepest portions of the cam grooves 4A and 5A, and the electromagnetic coil 2 3 causes the ring member 5 to rotate in the direction shown by the arrow in FIG. 3 in accordance with the rotation of the movable iron core 3 into the state shown in FIG. 4, and conversely, the electromagnetic coil 2 is de-energized. By doing so, the ring member 5 is rotated in the direction shown by the arrow in FIG. 4 in accordance with the rotation of the movable iron core 3 to be in the state shown in FIG.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

3 is a view showing a cam mechanism for rotationally guiding a movable iron core of the fluid control valve shown in FIG. 1, and is a circumferential sectional view showing a state in which a flow path is blocked .

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 4

[Correction method] Change

[Correction content]

FIG. 4 is a view showing the cam mechanism shown in FIG. 3, and is a circumferential sectional view showing a state in which a flow path is opened . ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] September 30, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in FIGS. In each of the drawings, FIG. 1 is a view showing an embodiment of the fluid control valve of the present invention, a sectional view showing a state in which the flow path of the movable iron core is blocked, and FIG. in the drawing, cross-sectional view showing the opened state of the flow path of the movable core, circumferential shown FIG. 3 is a diagram showing a cam mechanism for rotating guiding the movable core of the fluid control valve shown in FIG. 1, a state in which blocks the flow path 4 is a sectional view in the direction of the direction, and FIG. 4 is a view showing the cam mechanism shown in FIG. 2, and is a sectional view in the circumferential direction showing the state in which the flow path is opened .

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

The guide member 4 constituting the cam mechanism for rotationally guiding the movable iron core 3 is a ring-shaped member fixed so as to cover the lower surface of the electromagnetic coil 2, and its first cam groove 4A is As shown in FIG. 3, it is formed as a groove that gradually becomes deeper to the right in the circumferential direction of the lower surface thereof. Further, the second cam groove 5A of the ring member 5 paired with the first cam groove 4A of the guide member 4 is the first cam groove 4A.
Is formed on the upper surface as a groove that gradually deepens in the opposite direction (to the left), and its circumferential length is the same as the circumferential length of the first cam groove 4A. The balls 6 interposed between the cam grooves 4A and 5A, when the flow path 3A of the movable iron core 3 is blocked by the seal member 9, as shown in FIG. The guide member 4 and the ring member 5 are located at the shallowest position, and the distance between the guide member 4 and the ring member 5 is maximized.
4 is located at the open end, as shown in FIG. 4, the gap between the guide member 4 and the ring member 5 is smallest at the deepest portions of the cam grooves 4A and 5A, and the electromagnetic coil 2 3 causes the ring member 5 to rotate in the direction shown by the arrow in FIG. 3 in accordance with the rotation of the movable iron core 3 into the state shown in FIG. 4, and conversely, the electromagnetic coil 2 is de-energized. By doing so, the ring member 5 is rotated in the direction shown by the arrow in FIG. 4 in accordance with the rotation of the movable iron core 3 to be in the state shown in FIG.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

3 is a view showing a cam mechanism for rotationally guiding a movable iron core of the fluid control valve shown in FIG. 1, and is a circumferential sectional view showing a state in which a flow path is blocked .

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 4

[Correction method] Change

[Correction content]

FIG. 4 is a view showing the cam mechanism shown in FIG. 3, and is a circumferential sectional view showing a state in which a flow path is opened .

Claims (1)

[Claims] 1. A case having a fluid inlet / outlet and integrated with a fixed iron core, an electromagnetic coil housed in the case, and an electromagnetic coil disposed in a shaft core hole of the electromagnetic coil and energizing the electromagnetic coil. A movable iron core that is sometimes attracted to the fixed iron core, a guide member that is disposed on the lower surface of the electromagnetic coil so as to surround the movable iron core, and that has a first cam groove in the circumferential direction, and a first guide member of the guide member. A ring member having a second cam groove that is paired with the cam groove and fixed to the lower end of the movable core, a ball rotatably interposed in the cam grooves of both the ring member and the guide member, and the ball. The ring member for storing the spring is provided with a mainspring which is rotated according to the first cam groove via the balls in accordance with the suction operation of the movable iron core and sequentially stores energy, and the movable iron core is provided with the doorway. Communicate with A fluid control valve, wherein a flow passage is formed in an axial direction, and the flow passage is blocked by the biasing force of the mainspring when the electromagnetic coil is not energized.