JPH04282087A - Solenoid operated valve - Google Patents

Abstract

PURPOSE: To reduce components inventory the assembly unit of a direct-control solenoid valve by encapsulating two electromagnets manufactured to have a coil with the use of part of a joint box of synthetic material having connection elements on one side and external connection means on the other. CONSTITUTION: Electromagnets that make up an assembly unit 1 each have a coil. Separately from the assembly unit 1, a terminal block 24 is formed from synthetic material. The terminal block 24 has three pins 25 to 27 passing therethrough and four connection parts 28 to 31 with which the internal ends of these pins 25 to 27 are integrated. The ends of the connection parts 29 to 31 are right-angled to form contact blades 29a to 31a, which are inserted into end plates 17 of associated bobbins 15 and connected to the coil terminals. The assembly unit 1 is embedded or typically encapsulated in a main body 36 made of insulating material.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to directly controlled solenoid valves, and more particularly to an arrangement for making the manufacture of solenoid valves with different types of pins more efficient and economical.

0002

BACKGROUND OF THE INVENTION Solenoid valves according to the present invention, particularly solenoid valves equipped with electromagnets arranged next to each other in the same unit, have been known in the art, for example, in the French patent F.
There is R2,377,080. In the solenoid valve disclosed herein, each of the electromagnets includes a mount made of an insulating material that supports the connection terminal of the coil wiring, and a magnet assembly provided within the mount and consisting of two tubes. is provided, and the magnet circuit is tightly attached to the magnet assembly before the electromagnet assembly unit is encapsulated.

Electromagnetic assemblies for solenoid valves generally include a shell for connecting the solenoid valve to a piece of equipment, the shell being formed during encapsulation, and They often have three connecting pins intended for special plug connection applications.

0004

By the way, there are conventionally various types of plugs for connecting solenoid valves, and these plug pins differ in shape and outline. Furthermore, the structure of the mating hole provided for receiving the pin is also different accordingly. Therefore, conventional solenoid valve structures must have electromagnetic assemblies compatible with various types of connection means.
Having inventory for these various connection types has doubled the number of electromagnet assemblies in stock that have the same mechanical and electrical characteristics but differ in connection means.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to streamline the manufacturing process of an electromagnet assembly unit for a solenoid valve equipped with different types of pins, to satisfy various needs and provide versatility, while also simplifying the assembly unit at the manufacturer's side. The point is to reduce the number of items in stock.

[0006]

[Means for Solving the Problems] In order to achieve the above object and achieve the objects, a solenoid valve according to the present invention comprises:
Core square pole piece (8) and winding form (15) surrounding this pole piece
a unit body (36) comprising at least two electromagnets each provided with a yoke (7) having a winding (16) wound thereon;
and a terminal block (24) comprising an electric contact portion to which an electromagnetic coil and a connecting means are electrically connected, and adapted to receive two movable cores constituting a shutter of a solenoid valve driven by the electromagnetic coil. In the directly controlled solenoid valve configured, each of the two electromagnets is configured to have a coil, and a terminal block made of a synthetic material is separately formed,
The terminal block has a connecting part provided with a blade on one side and an external connection means similar to a pin on the other end, the blade being inserted into the electromagnetic coil and connecting the two electromagnets and the terminal block. is placed in the mold,
The electromagnet and the terminal block are connected by encapsulating a portion of the electromagnet and the terminal block.

[0007]

Operation: The invention produces two electromagnets, each with a coil, a connecting member provided with a contact blade on one side, a pin or other external connection means on the other side, and a synthetic material. This is a process used when manufacturing a junction box made of aluminum and using a part of this junction box to encapsulate two electromagnets.

[0008] In the solenoid valve according to the present invention, two electromagnets are assembled so that each has a coil, and a terminal block is assembled separately. The terminal block has a blade (connection plug) on one side and means such as a connecting pin on the other side, these blades are inserted into the coil of the electromagnet, the two electromagnets and the terminal block are placed in the mold, and the terminal Encapsulation of the electromagnet and a portion of the terminal block is performed such that the block connects to the electromagnet. The terminal block should not be so large that it completely fills the mold cavity, but should have some clearance. By providing sufficient clearance, the mold recess is free to accept a variety of terminal blocks of different shapes and sizes.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a part of a solenoid valve according to the present invention. An electromagnet assembly unit 1 constituting this solenoid valve includes a movable core 2 provided with at least one shutter 3.
is pressed by a spring 6 and supported by the shutter pedestal 4 of the valve body 5 when power is not supplied to the electromagnet. In this embodiment, these two parallel valves are, for example, three-way valves.

The assembly unit 1 includes two adjacent electromagnets at the same position (in the same assembly unit), and each electromagnet has a U-shaped yoke 7. The upper arm 7a of the yoke 7 is provided with a hole for fixing a cylindrical core type pole piece 8 through which a vertical groove 9 passes in the axial direction. Further, a U-shaped notch 10 is formed in the lower arm 7b of the yoke 7 (FIG. 3), and a fitting member 11 having a substantially U-shaped external appearance is fitted into this notch 10. This fitting member 1
1 has a thick recess 12 in the center, and two wing parts 13 and 14 thinner than the recess 12 are provided on both sides of the recess 12. As a result, when fitting the fitting member 11, the wing parts 13, 14
will extend above the lower arm 7b of the yoke.

Each electromagnet has a winding form 1 made of an insulating material.
5 as a component. A winding 16 is wound around this winding form 15, and the winding form 15 is further provided with three end plates (end plates) 17, 18, 19 at the upper and lower positions thereof. Among these, the end plate 17 has a thick portion on at least a portion thereof, and the yoke 7 supports this thick portion. Further, the end plate 18 is supported on the upper part of the component 11, and the end plate 19
is supported on the outer surface of arm 7b. The end plate 19 is inserted into the space 21 of the valve body 5 and has a cylindrical skirt portion 20 sealed by a packing 22 at its lower end.

The assembly unit 1 also includes a temperature switch (thermo sensor) 23 (FIG. 2). This temperature switch 23 is provided in the area where the temperature is highest between the two electromagnet windings 16, for example, in the middle of the coil, so that the rise in the solenoid temperature can be reliably sensed. Note that one terminal of the temperature switch 23 is connected to one end of each electromagnetic coil.

The electromagnet assembly unit 1 also includes a terminal block 24 . This terminal block 24 has three pins 25 and 26 that pass through the block 24.
and 27, and four connecting portions 28, 29, 30, and 31, for example, the inner ends of the pins 25 to 27 are connected to the connecting portion 28.
, 29 and 30 (FIG. 4). In the case of this special case as shown in FIG. 4, it is desirable that the pins 25 to 27 be formed as a single member (as if they were a single member), although each pin has an individual connection shape.

Furthermore, the ends of the connecting portions 29 to 31 are bent at right angles to form four contact blades (blade-like plugs) 29a, 30a.
, 31a, 31b are formed. These blades 29a
31a and 31b are inserted into the end plate 17 of the winding form 15 and brought into contact with the coil terminal. terminal 32 of temperature switch 23;
33 connects the connecting portion 28 by welding or other appropriate means.
, 31. The terminal block 24 also has a groove 3.
4 and positioning blades 35 are provided.

This assembly unit 1 has a main body 36 formed of an insulating material through a process such as encapsulation.
Bury inside. Assembly unit 1 shown in Figures 1 to 4
is manufactured, for example, as follows.

First, the required electromagnet and terminal block 24 are assembled independently. terminal block 2
4, the connecting parts 28 to 31 are cut out as a single part, leaving the bridge parts 37, 38 and 39 shown in broken lines in FIG. By bending the connecting parts 28 to 31, which are a single part, the pins 25 to 27 and the blade 29a
, 30a, 31b are formed.

These pins are then incorporated, by encapsulation or other means, into a component 40 formed of an insulating material, but the component 40 is removed for the insertion of pins 25-27.
The insertion of the pins 25-27 into the holes provided therein can be easily guided with considerable freedom. Next, the bridging parts 37, 38 and 39 are cut in order to separate the four connecting parts 28-31, respectively. Then, with the temperature switch 23 disposed in the middle of the electromagnetic coil, the blades 29a, 30a, 31a, and 31b are divided into pairs, and the blade terminal of each pair is connected to one terminal of the electromagnetic coil (connection by insertion).

The assembly unit 1 is disposed in a concave shape of a mold consisting of two shells (mold pieces) 41 and 42, the outline of which is shown in FIG. The synthetic material 36 injected into the mold not only molds the electromagnet, but also fills the groove 34 in the terminal block 24, so that the terminal block 24
It is housed in a housing that is integrated with the electromagnet by injecting resin, etc.

The circumferential edge size of the terminal block 24 is set to be the same size as the circular collar 43 that closes the recess (mold recess) 44 in which the terminal block 24 (connector 24) is arranged and accommodated. On the other hand, the shape and dimensions of the inner end of the terminal block 24 can be changed and set as necessary. The remaining portion of the terminal block 24 is not large enough to completely fill the recess 44, but has some clearance. This clearance is large enough that recess 44 can accommodate terminal blocks of different shapes and sizes.

FIGS. 6 and 7 show an example of another terminal block according to the present invention. This terminal block 1
24 is a thread groove 14 for screwing the connector into place.
has 0. Furthermore, this terminal block 124 is provided with three pins 125, 126, and 127, and further has four connecting portions having blades 129a, 130a, 131a, and 131b that are similar in structure to the blades (blade-like plugs) in the previous embodiment. 128, 129, 130 and 131 are provided. The connecting portions 128-131 are all cut out from a single piece, and this single piece is cut and bent to form the blades 129a-131a, 131b. Furthermore, the connecting portions 128 to 131 are connected to a bridge portion 138.
and 139 are temporarily joined to this single part.

After this single piece is mounted on the pins 125-127 by edge bending or some other known means, the bridges 138 and 139 are cut away to separate each of the four connecting pieces. The connecting part 131, which is not integrally formed with any pin, is temporarily supported via two interlocking points 141 and 142. Further, after the temperature switch 23 is connected, the terminal block 124 is connected to the electromagnet by performing the above-described encapsulation. Note that the retainers 35 and 135 are optional parts and are not necessarily required.

[0022]

[Effects of the Invention] As explained above, the solenoid valve according to the present invention can operate without constantly changing the subassembly consisting of two electromagnets and a main body housing the electromagnets.
It is possible to combine subassemblies and terminal blocks according to the user's requirements. Manufacturing of electromagnet assemblies with various pin configurations can be streamlined.

[Brief explanation of the drawing]

FIG. 1 is a sectional view taken along line II in FIG. 2, showing an example of a solenoid valve according to the present invention.

FIG. 2 is a plan view of an assembly unit according to the invention. One of the coils is shown as a cross-section along the line II--II, and the body made of synthetic material is indicated simply by a dot-dashed line.

FIG. 3 is an exploded view showing in detail the lower part of the yoke of one of the two electromagnet units in FIGS. 1 and 2;

FIG. 4 is a diagram showing the pin mount of the terminal block as seen from the coil side.

FIG. 5 is a schematic diagram showing the process of encapsulating the electromagnet and terminal block.

FIG. 6 is a sectional view showing another embodiment of the terminal block according to the present invention.

FIG. 7 is a rear view of the terminal block according to the present invention shown in FIG. 6;

[Explanation of symbols]

1 Assembly unit (electromagnet unit) 2 Movable core 7 Yoke 8 Pole piece 10 Notch 11 Fitting member 15 Winding form 24 Terminal block (terminal box) 25-27, 125-127 Pin 44 Recess (mold recess)

Claims (5)

[Claims] 1. A unit comprising, for each of at least two electromagnets, a yoke (7) comprising a core-type pole piece (8) and a winding (16) wound around a winding form (15) surrounding the pole piece. A terminal block (2) comprising a main body (36) and an electrical contact portion to which an electromagnetic coil and a connecting means are electrically connected.
4) A direct control solenoid valve configured to receive two movable cores forming a shutter of a solenoid valve driven by the electromagnetic coil, wherein each of the two electromagnets is configured to include a coil. On the other hand, a terminal block of synthetic material is formed separately, the terminal block having a connecting part provided with a blade on one side and an external connecting means similar to a pin on the other end, the blade being The two electromagnets and the terminal block are inserted into the electromagnetic coil, and the two electromagnets and the terminal block are arranged in a mold, and the electromagnet and the terminal block are connected by encapsulating a part of the electromagnet and the terminal block. A solenoid valve featuring: 2. The blades (129a, 130a,
131a and 131b) and the connecting parts (128, 12
9, 130, and 131) are taken out from a single component, and the connection components are separated from each other after the single component is attached to the terminal box. . 3. The pins (25, 26 and 27);
The blades (29a, 30a, 31a, 31b);
2. The method according to claim 1, wherein the connecting parts (28, 29, 30, 31) are taken out from a single part, and the connecting parts are separated from each other after encapsulation of the single part. Solenoid valve. [Claim 4] Before inserting the blade,
A temperature switch (23) is connected between the four connecting parts, and the blades are inserted into the coil in pairs while the temperature switch is placed between the windings of the electromagnet. 4. The solenoid valve according to any one of claims 1 to 3. 5. A mold for a solenoid valve according to claim 1, wherein a gap is provided in the recess for receiving the terminal box to allow encapsulation of terminal boxes of different shapes.