JPH0460287A - Solenoid valve - Google Patents

Abstract

PURPOSE:To make it possible to use parts for solenoids in common regardless of the number of solenoids to be built in, to fix molding conditions, and lighten the weight of a whole valve by building a dummy solenoid. CONSTITUTION:A solenoid 10 and dummy 11 is built in a solenoid housing 9. The dummy 11 is made of synthetic resin and having the same outline and the same or much more strength as those of the solenoid 10. The solenoid housing 9 is made of synthetic resin with the solenoid 10 and dummy 11 molded in a body. Since, therefore, a solenoid valve, which can be used as a double solenoid type valve also, is used as a single solenoid type valve, parts of this valve can be used as common parts for single type and double type valves, and resin quantity for molding and resin charging conditions can also be made to be fixed for single and double type valves. In addition, the weight of the whole of the solenoid valve can also be lightened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a solenoid valve that can incorporate a plurality of solenoids for opening and closing a valve body.

[Conventional technology]

Normally, in electromagnetic valves, even if the valve mechanisms such as spools and ports have the same configuration, the configurations of the body and pilot valve parts will generally differ if the number of solenoids that operate the spools differs.

However, especially in the case of a configuration in which a plurality of solenoids are integrally molded, it is desirable to use common parts and to keep the amount of molding resin, resin filling conditions, etc. constant.

[Problem to be solved by the invention]

For this reason, conventionally, even if there is an unnecessary solenoid, if there is a space to accommodate the solenoid, the unnecessary solenoid is assembled into a predetermined space and molded. In this case, not only was the solenoid wasted, but it was also heavier than necessary.

The purpose of this invention is to make parts common, to make manufacturing easier by keeping molding conditions constant, and to eliminate the need for extra parts and to reduce weight. Our goal is to provide a solenoid valve that can.

[Means to solve the problem]

In order to achieve the above object, the present invention incorporates a dummy having approximately the same external shape and approximately the same or stronger strength as the solenoid in the empty space created by not incorporating at least one solenoid. It is crowded.

[Effect]

Therefore, according to the present invention, regardless of the number of solenoids to be incorporated, components other than the solenoids can be made common, and molding conditions can be kept constant. Furthermore, there is no need to incorporate unnecessary solenoids, and the weight can be reduced.

〔Example〕

An embodiment embodying the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a spool 2 is housed in a valve housing 1 consisting of a body block 1-a and two caps lb and Ic so as to be switchable between two positions.

Chambers R1 and R2 are formed in the valve housing 1 at positions corresponding to both ends of the spool 2. A piston 3 is housed in one chamber R1, and the piston 3 is attached to one end of the spool 2. Further, a pressure spring 4 is provided in the other chamber R2, and the spool 2 is always biased toward the left side in FIG. An input port 5 is formed in the body block 1a, and a pair of output ports a, 6b and exhaust ports h7a, 7 are provided on both sides of the input port 5.
b are formed respectively.

An auxiliary housing 8 is bonded and fixed to one end of the valve housing l, and a solenoid housing 9 is bonded and fixed to the auxiliary housing 8.

Inside the solenoid housing 9 is a fixed iron core 10a, a coil 10c fixed to a bobbin 10b, and a solenoid IO consisting of a yoke IOd, and a synthetic solenoid IO having approximately the same external shape as the solenoid 10 and approximately the same or stronger strength. A dummy 11 made of resin is incorporated. The solenoid housing 9 is formed by integrally molding the solenoid lO and the dummy 11 from synthetic resin.

To explain this molding method, Figures 1 and 2
As shown in the figure, a solenoid 1 is mounted on a plate-shaped holder 12.
For positioning of 0 and dummy If, support legs 13.1 correspond to solenoid IO and dummy II, respectively.
A solenoid l'' 10 is immovably supported between one support leg I3, and a dummy 11 is immovably supported between the other support leg I3.
At approximately the center of the holder 12, the solenoid 10 and the dummy 1
A pair of holes 17 are formed between the solenoid 10 and the solenoid 10, through which two terminals 15 extending from the solenoid 10 can be inserted in a close state.
The terminal 15 is inserted into the hole 17 and protrudes from the holder I2. A mold stopper 16 is recessed on the outer periphery of the holder 12. The holder 1 supports the solenoid 10 and the dummy 11 with the mold stopper 16 of the holder 12 in contact with the ring-shaped part of the molding die.
By setting the solenoid 10 and the dummy 11 in a mold and pouring the synthetic resin into the mold, the solenoid 10 and the dummy 11 can be integrally molded with the solenoid housing 9.
The ring-shaped portion connects the outer surface of the holder 12 (the terminal 15
It is possible to prevent the synthetic resin from going around to the protruding side). or,
Since the inner peripheral surface of the hole 17 is in close contact with the terminal 15, the synthetic resin will not leak from between the two.

A plunger 19 is provided inside the solenoid,
By energizing the solenoid 10, the plunger 19 is attracted to the fixed iron core 10a against the pressure spring 20. A movable body 22 is connected to the tip of the plunger 19 so as to be movable as one body by the action of a pressing spring 22a. On the other hand, inside the auxiliary housing 8 are each pair of valve seats 23a.
, 23b, 24a, 24b are formed, and valve bodies 25a, 25b which can come into contact with one of the valve seats 23a, 23b are attached to the plunger 19 and the movable body 22.

Valve holes 2 communicating with the input port 5 are provided in the valve seats 23a and 24a.
7a and 28a are formed, and a valve seat 23b.

Pressure release holes 27b and 28b communicating with the outside are formed in 24b, but the pressure release hole 28b corresponding to the dummy 11 side is closed by a plug 28c. The chamber 29 in which the movable body 22 is accommodated is communicated with the one chamber R1 via a passage 30, and the other chamber 31 is communicated with the other chamber R2 via a passage 32.

Alternatively, as shown in FIG. 5, the same condition can be obtained by closing the valve hole 28a with a plug 28c and installing a pressure supply hole 1d. Then, the opening and closing of the valve bodies 25a and 25b with respect to the valve hole λ7a and the pressure relief hole 27b are switched by excitation and demagnetization of the solenoid IO, and the supply of pressurized air to the chamber R1 and the discharge of the pressurized air from the same chamber R1 are performed. Then, the spool 2 is switched to the two positions by the air pressure applied to the piston 3 and the urging force of the pressing spring 4.

In this explanation, a solenoid valve that can also be used as a double solenoid type is used as a single solenoid type, but in the empty space created by not incorporating a solenoid IO, a Since the dummy 11 that provides strength is incorporated, there is no need for a holder 12 for single solenoid type, and parts can be shared for single and double solenoid types, and the amount of molding resin and resin filling conditions can be changed for both single and double solenoid types. can be kept constant, thus making manufacturing easier. Further, since there is no need to incorporate unnecessary solenoid 10, plunger 19, etc., the weight of the entire electromagnetic valve can be reduced.

Figures 3 and 4 show a double solenoid type electromagnetic valve. This solenoid valve has a solenoid 10 installed in the dummy 11,
By switching the valve bodies 25a and 25b, air is supplied to and discharged from the chamber R2. Therefore, although not shown in the figure, the piston 3 is also placed inside the chamber R2 by removing the pressing screw 4.
is provided, and the spool 2 is switched to two positions. In this way, by simply incorporating the solenoid 10 instead of the dummy 11, a double solenoid type can be achieved without using special parts. In addition, in the double solenoid type, since there are four terminals 15, four holes 17 are formed so as to be lined up almost in a straight line between both solenoids lO of the holder 12, and the terminals 15 are inserted into these holes 17. It is inserted in a close state.

Therefore, it is only necessary to add two holes 17, and there is no need to prepare parts other than those of the single solenoid type, and the space for the terminals 15 is concentrated in one place, making it possible to make the entire structure more compact.

Note that this invention is not limited to the above embodiments,
The configuration of each part can be arbitrarily changed without departing from the spirit of the invention, such as by embodying the invention in a solenoid valve having three or more spaces for solenoids.

[Effects of the Invention] As detailed above, according to the present invention, parts can be made common, molding conditions can be kept constant to facilitate manufacturing, and unnecessary parts can be eliminated. It has the excellent effect of eliminating the need for and reducing weight.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing the entire electromagnetic valve of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is a partial sectional view of the double solenoid type electromagnetic valve, and Fig. 4 is a sectional view of the double solenoid type electromagnetic valve. B in Figure 3
5 is a side sectional view showing another embodiment in FIG. 1. Solenoid lO, dummy 11, valve bodies 25a, 25b.

Claims (1)

[Claims] 1. In a solenoid valve that can incorporate a plurality of solenoids (10) for opening and closing the valve bodies (25a, 25b), the solenoid (10) is installed in the empty space created by not incorporating at least one solenoid (10). A solenoid valve characterized by incorporating a dummy (11) having approximately the same external shape and approximately the same or greater strength.