JPH03219177A - Electromagnetic valve - Google Patents

Abstract

PURPOSE:To ensure workability improvement and less product cost, eliminate a trouble in valve performance due to a magnetic impurity and obtain highly reliable performance characteristics by providing a press molded member of thin plate spring at the functional and movable part of a valve. CONSTITUTION:When supplied with electric current, a coil 8 is excited and causes a valve 13 to be attracted to a fixed magnet core 4 against the spring function of the valve 13 in such a way as to bend the valve 13 about a bobbin corner 21 as a support point. The coil 6 when deenergized, releases the valve 13, and the valve 13 is pushed forward due to the spring function thereof. According to the aforesaid construction, an input port 11 is opened and closed with the valve seal of the valve 13 in response to the energization and deenergization of the coil 8. As a result, a control fluid flows through the input port 11 when the valve 13 is opened, and passes from the third discharge port 12b of the valve 13 to the second discharge port 12a of a bobbin 7. Furthermore, the fluid flows out from the discharge port 12 of a case 1 and the flow of the control fluid is stopped, when the valve 13 is closed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a solenoid valve, and is concerned with improving assembly workability and reducing product cost. [Prior Art] FIG. FIG. 2 is a sectional view showing a conventional II solenoid valve of this type.

In the figure, ■ is a case made of magnetic material and serves as a yoke, 2 is a plate made of magnetic material, 3 is a plunger of a movable iron core, 4 is a fixed iron core, 5 is a valve seat made of non-magnetic material, 6 is a spring, 7 is a bobbin, 8 is a solenoid coil, 9 is a lead terminal, IO is an 0 ring, 11 is an input hole,
The string is an evacuation hole.

Note that a magnetic circuit is formed by the case 11 plate 2, plunger 3, and fixed iron core 4.

In the above configuration, when the current is passed through the coil 8,
The coil 8 is energized and attracts the plunger 3 to the fixed iron core 4 against the spring 6. When coil 8 is deenergized...
Fixed core 4G'! Release plunger 3 and spring 6
The plunger 3 is pushed forward.

In this way, the input hole 11 is opened and closed by the conical tip of the plunger 3 in response to the energization and de-energization of the coil 8. Therefore, when the valve is opened, the control fluid flows in from the input hole (2) and flows out from the discharge hole (1), and when the valve is closed, the flow of the LM control fluid is stopped.

[Invention or problem to be solved]

As described above, in the conventional solenoid valve, the components of the case 11, plate 2, plunger 3, and fixed core 4 are required to form a magnetic circuit, and the plunger 3 is attached to the valve seat 5 in order to block the control fluid. Since a spring 6 is required for applying pressure, it takes time to assemble the above-mentioned parts, and the production cost increases due to the large number of component parts. Furthermore, there are other problems such as slowing down of the movement of the plunger 3 when magnetic impurities in the fluid are mixed into the outer periphery of the plunger 3.

This guan μlj was created to solve such problems.It aims to improve workability and reduce product cost by reducing the number of component parts, and by making the valve a thin plate, it is easy to process. It is an object of the present invention to provide a solenoid valve in which the operation of the plunger is facilitated and further the plunger movement is not slowed down by magnetic impurities.

[Means to solve the charge]

The solenoid valve according to the present invention comprises a thin plate spring made of a magnetic material, and this valve has a valve function, a magnetic flux passage function, a spring function, a control fluid distribution function, etc. required by a solenoid valve. It is something.

[Effect]

The valve made of a thin plate spring according to the present invention can eliminate the plate and spring that form the magnetic circuit in conventional electromagnetic valves, simplifying assembly work and reducing product cost. Furthermore, by forming the valve with a thin plate spring and having no sliding parts, accidents such as the valve losing its power are eliminated.

〔Example〕

FIG. 1 is a cross-sectional view showing a solenoid valve according to an embodiment of the present invention, FIG. FIG. 3 is a plan view of the valve, and FIG. 4 is a cross section taken along the line IV--IV in FIG. 3, and is a T diagram showing the shape during press molding.

In these figures, 1.4.5.7 to 12 indicate the same members or equivalent parts as in the above conventional example. 12a is bobbin 7
A second groove is partially machined on the end face of the hole and communicates with the above-mentioned suspension hole.
The discharge port 13 is a valve formed by pressing a thin plate spring material made of magnetic material, and is easily seen between the bobbin 7 and the case 1. The case 11 valve 13 and the fixed iron core 4 form a magnetic circuit. Form.

Reference numeral 13a is a thin plate spring portion of the valve 13 having a spring function, and the spring force depends on the shape of this portion.

131) is a valve seal portion protruding from the center to close the control fluid. 13C is in the shape when valve B is assembled, and is assembled under a spring reaction force.

'Llb is a third discharge hole formed as a hole in the valve 13, and 14 is a control fluid flow path in a state where the valve 13 is attracted to the fixed iron core 4 when current is applied to the coil 8.

Next, its operation will be explained. When a current is applied to the coil 8, the coil 8 is energized, and the coil 8 is attracted to the fixed iron core 4 so as to bend the valve 13 using the bobbin corner 21 as a fulcrum, against its spring function, and the coil 8 is deenergized. Then, the valve 13 is released, and the valve 13 is pushed forward by the spring function of the valve 13, and in response to the energization and deenergization of the coil 8, the input hole 11 of the valve 13 is opened. It is opened and closed. Therefore, when the valve is opened, the control fluid flows in through the input hole 11, flows through the eighth discharge hole 12b provided in the valve B, through the second discharge hole 12a provided in the bobbin 7, and further flows through the second discharge hole 12a provided in the bobbin 7. The flow of control fluid is stopped when the valve is closed. Figs. 5 and 6 show a solenoid valve according to another embodiment of the present invention. The pulp seal part 13bi at the center of the pulp flap in the above embodiment is a valve in which the corresponding part is pressed into a double protrusion. 15
16 is a control pressure outlet hole which has the same function as the second discharge hole 12b, 16 is a control pressure outlet hole partially grooved on the end surface of the bobbin 7, and 17 is a control pressure outlet hole which has the same function as the second discharge hole 12b. The discharge hole and slide for discharging the control fluid to the atmosphere are O-rings. Next, in FIG. This is a valve connected to the valve. Note that 19a is a control fluid flow hole.

In the above-mentioned device, a current is passed through the coil 8,
The coil 8 is energized to attract the fixed iron core 4 so as to bend the valve 15 or 19 about the bobbin corner 21 against its spring function.

When the coil 8 is placed in the 7th position, the valves 15 and 19 are released and the spring function releases the valves 15 or 1.
9 is pushed forward. In this way, in response to the energization and de-energization of the coil 8, the valve 15! ! The input hole 11 and the discharge hole 17 are opened and closed by the valve 19.

Therefore, when the input hole 11 is opened, the discharge hole 17 is closed,
The control fluid flows in from the input hole 11, and the control fluid flows through the control fluid flow hole 1.5a provided in the valve 15: f or 7" 19.
: The control oil pressure from the control oil pressure take-out hole 16a flows from the control oil pressure take-out hole 16a provided in the bobbin 7 through the control oil pressure take-out hole 16a provided in the case, and the control oil pressure from the control oil pressure take-out hole 16 flows through the control oil pressure take-out hole 16a provided in the case. is equal to the pressure of And input hole 1
1 is closed, the discharge hole 17 is opened, the control fluid flows through the control oil pressure extraction holes 16 to 16a, and is discharged to the discharge hole 17, so that the control oil pressure becomes equal to atmospheric pressure.

〔Effect of the invention〕

As explained above, this invention is provided with a thin plate spring press-molded member for the valve function movable part G, which improves workability and reduces product cost by reducing the number of parts L4, and further improves the valve function by using magnetic impurities. Eliminating defects has the effect of providing highly reliable functional characteristics.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing one embodiment of the solenoid valve according to the present invention, Fig. 2 is an explanatory diagram of its operation, Fig. 3 is a plan view of the valve, and Fig. 4 is a cross-section taken along the bar ■ line in Fig. 3. Figures 5 and 6 are cross-sectional views showing other embodiments of the present invention, and Figure 7 is a cross-sectional view of a conventional solenoid valve. is the valve seat,
7 is bobbin, 8 is solenoid coil, Jl is manual hole, L
Kyosu is the discharge hole, Nagi is the valve, 13a is the thin plate spring part, 13
1) G2 valve seal part. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] A case made of a magnetic material, a solenoid coil housed in this case, a bobbin around which this coil is wound, a fixed core attached to the inner circumference of this bobbin, and a solenoid coil placed in the magnetic path between the case and the fixed core. The outer peripheral part is clamped between the case and the bobbin, and the central part has a valve seal part that is movable by the deflection of a spring. A solenoid valve characterized by being equipped with a valve made of a magnetic thin plate spring that is attracted toward the direction.