JPH0141981Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the coupling structure between the valve body and the electromagnet in a small direct-acting electromagnetic valve mainly for use in gaseous fluids, in which the valve body and the electromagnet each consist of one piece. The conventional structure is as shown in FIG. 1, in which a is a perspective view of the external appearance and b is a longitudinal sectional view taken along line X-X'. A cylindrical yoke 4 surrounding the excitation coil 1, a disk-shaped yoke lid 5 at the open end of the yoke, a fixed iron core 3 fixed to the bottom of the closed end of the yoke 4, and one end fixed to the yoke. A guide pipe 6 made of a non-magnetic material, which is fitted and fixed to the iron core 3 and whose other end is fixed by the yoke cover 5 at the open end, is inserted into the hollow part of the coil 1. One electromagnet 11 is inserted so that the movable iron core 2 can freely slide inside the pipe, and a valve body 13 integrated with a support rod 14 is installed inside the cavity 20. The body has a valve seat with orifices 15 and 15'.
Fluid connection ports 16, 1 via fluid channels 17, 17'
One valve body 21 provided with a valve 6' is fixed with a fluid sealing material 18 sandwiched therebetween.
A spring 7 is attached to the fixed iron core side of the movable iron core 2 of the electromagnet, and when the electromagnet is not energized, the movable iron core 2 is pushed toward the valve body side and separated from the fixed iron core 3. On the other hand, a support rod 14 fixed to the valve body 13 is inserted into a hole provided on the other side of the movable iron core, so that the valve body 13 closes the orifice 15'. When the electromagnet coil is energized, the movable iron core 2 is attracted to the fixed iron core 3, so the valve body 13 is connected to the flow path 1.
The fluid pressure from 7' pushes it away from the valve seat and opens orifice 15'. In a solenoid valve having such a structure, the axis of the movable iron core 2 of the electromagnet 11 , the cavity in the valve body, the axis of the valve element 13 and support rod 14 that open and close the orifice within the cavity, and the center of the through hole 12 thereof are aligned. It is necessary that they line up in a straight line. For this purpose, conventionally, the yoke 4 was formed into a cylindrical shape as described above, and the end of the body portion 21 of the valve body 21 on the electromagnet side was provided with a circular hole so that the yoke 4 fit into the electromagnet. 11 and valve body 21
are coaxially fitted and fixed. As a fixing means, the valve body body on the outer circumference of the open end side of the yoke 4 is used.
A notch groove 9 is provided in the fitting portion of the part 21, and the electromagnet part 11 is fitted and attached to the body part 21, while a groove 9 is pre-engraved on the outer part of the body part 21 at a position corresponding to the groove 9. The electromagnet 11 is fixed to the valve body 21 by pressing and deforming the plurality of recesses 19 from the outside. On the other hand, the fluid flowing in from the fluid connection port 16' passes through the through hole 12 of the valve body support rod 14 and flows into the guide pipe 6 side of the electromagnet. The sealing material 18 is provided between the valve body 21 and the electromagnet 11 , and the heat conduction of the excitation coil is also improved. A synthetic resin 8' is injected into the yoke 4 to completely fill the area around the excitation coil 1. Furthermore, the electromagnet 1 is made by insert molding of synthetic resin.
By covering the outer periphery of the electromagnet 1 (the surface other than the joint portion with the valve body 21 ) with a synthetic resin material 8, the electromagnet is protected and the heat dissipation effect is improved. Due to the above structure, the yoke 4 of the electromagnet 11
Since it is cylindrical, it is not possible to use a yoke made of U-shaped sheet metal material that is used as a general electromagnet alone, and the molding process of the synthetic resin material is two steps, one inside and outside of the yoke 4. This has the drawback of making it expensive for a small, direct-acting solenoid valve. The present invention eliminates the above-mentioned drawbacks and also solves the problem of coupling with the valve body in the case of the U-shaped yoke used in general electromagnets, thereby providing an inexpensive, small, direct-acting solenoid valve. It is something. The main proposal will be explained below. In order to facilitate understanding, common parts have been given the same number as much as possible. FIG. 2 shows an example of the implementation of the present invention. Figures a and b show a solenoid valve in which the electromagnet part 11' is not molded with resin and is fitted and fixed to the valve body part 21', and a is a front view and b is a side view. c is a front view of a completed resin-molded solenoid valve. 3a shows a longitudinal sectional view taken along line YY' in FIG. 2c, and FIG. 3b shows a cross sectional view taken along line ZZ' in FIG. 2c. In the present invention, the yoke 24 of the electromagnet 11' is made of, for example, cold-rolled steel and pressed into a U-shape as shown in FIG. 4a, and the yoke lid 25 forming the magnetic circuit is also shown in FIG. 4b. It is a processed sheet metal material similar to the shape of the yoke 24 shown. Notches 29, 29' are provided at the center of the open end side 24 of the yoke 24 , and small notches 30, 30', 31, 3 are provided on both sides of the notch.
1' is provided. The yoke lid 25 has a half-opened protrusion 27 in the center with a through hole 36 through which the movable iron core can freely slide, and a notch 2 of the yoke on one opposite side.
Protrusions 26, 2 for fitting and fixing to 9, 29'
6' is provided. As shown in FIG. 4c, in the body portion 21' of the valve body 21 ', a groove 2 having a V-shaped cross section is provided at the corner of one opposing side of the surface 38 that contacts the yoke cover 25 of the electromagnet 11'.
3 and 23', and a hole 37 is provided in the center of the surface 38 into which the half-opened protrusion 27 of the yoke lid fits,
A through hole 12 through which the support rod 14 of the valve body 13 passes passes through the center of the bottom surface of the hole 37 . The fixed iron core 3 of the electromagnet 11' is caulked and fixed to the closed end side of the yoke 24 , and the guide pipe 6 of the movable iron core 2 is externally fitted to the fixed iron core 3, and the excitation coil is connected externally to the pipe 6. 1 is attached, and the coil is connected to the yoke 2 by the yoke cover 25 on the open end side of the yoke 24.
It is held between the closed end of 4. Yoke lid 25
The protrusions 26, 26' of the lid are fitted into the notches 29, 29' of the yoke 24, and small notches 30, 30', 31, 31' are formed at the edge of the yoke 24. Small convex edges 34, 3 formed by providing
4', 35, 35' are the notches 29, 29' of the yoke.
By tilting the yoke 24 to the side as shown in Figure 5a,
Fixed to. Furthermore, the half-open protrusion 27 of the yoke lid 25 of the electromagnet 11' is fitted into the hole 37 of the mounting surface 38 of the body part 21 of the valve body 21', and a small hole is attached to the edge of the yoke 24. Convex edges 32, 32' formed by providing notches 30, 30', 31, 31';
33, 33' are the edges 22 of the grooves 23, 23' provided at the corners of the mounting surface 38 of the valve main body part 21',
The valve body 21' is attached to the electromagnet 11' so as to sandwich the valve body 22'.
Attach the yoke convex edges 32, 32', 33, 3
3' is the V-shaped groove part 23 of the valve main body part 21',
The valve body 21' is fixed to the electromagnet 11' by folding the valve body 23' into the electromagnet 11' as shown in FIG. 5b. With the above structure, the electromagnet 1
The central axes of the valve body 21' and the valve body 21' can be maintained correctly on a straight line, and both can be fixed. The movable iron core 2 of the yoke lid 25 is used as an axis alignment means.
Although a half-cut protrusion 27 is provided around the through hole 36, a yoke lid 25' having a plurality of half-cut small protrusions 39 as shown in FIG. 6A may also be used. Of course, in this case, the valve body is also attached to the small protrusion 3 of the yoke lid 25' as shown in Fig. 6b.
The valve body 21'' is provided with a small hole 40 that fits into the valve body 21''.
3' instead of U-shaped grooves 43, 4 as shown in Figure 7.
3' is provided on the end surface 4 of the edges 42, 42' of the joint surface.
1, 41' with the inner surface of the open end side 24 of the yoke to maintain the correct interval between the yoke, and fix the electromagnet 11' and the valve body 21' in the same manner as with the V-shaped groove. Good too. As described above, according to the present invention, the yoke and yoke cover of the electromagnet can be fabricated from sheet metal materials that can be mass-produced, and the shafts of the electromagnet and valve body can also be securely held. Since the external synthetic resin can be reliably molded in one step, it is possible to provide a small direct-acting solenoid valve with good performance at low cost.

[Brief explanation of the drawing]

FIG. 1 shows a conventional solenoid valve, in which a is an external perspective view and b is a vertical cross-sectional view. Figure 2 shows an example of the implementation of the present invention, with a, b
are front and side views without resin molding. c is a front view of the finished product molded with resin. FIG. 3 is a longitudinal cross-sectional view and b a cross-sectional view of the present invention. FIG. 4 is a perspective view of the yoke a, the yoke cover b, and the valve body c of the present invention.
FIG. 5 is an explanatory diagram of the yoke lid and valve main body fixing means of the present invention. FIG. 6 shows another embodiment of the present invention a
A perspective view of the yoke cover and the main body of valve b. FIG. 7 is a perspective view of the valve body showing another embodiment of the present invention. 11 , 11' ...Electromagnet, 21 , 21' , 21"
... Valve body, 1 ... Excitation coil, 2 ... Movable iron core, 3 ... Fixed iron core, 4, 24, 24 ... Yoke,
5, 25 ... Yoke lid, 8, 8', 28, 28'...
Synthetic resin, 23, 23'... V-shaped groove, 27...
...Half-cut protrusion, 29, 29'...Notch, 30,
30', 31, 31'...Small notch, 32, 32',
33, 33', 34, 34', 35, 35'... Convex edge, 39... Half-open small protrusion, 43, 43'...
...U-shaped groove.

Claims (1)

[Claims for Utility Model Registration] 1. An excitation coil, a yoke surrounding the coil, a yoke lid, a fixed iron core fixed to the closed part of the yoke, a through hole in the yoke lid, and a yoke lid for the coil. 1 consisting of one electromagnet made of a movable iron core whose hollow part is movable in the axial direction of the coil, a hollow part having a valve body inside and a plurality of orifices on the peripheral wall, a fluid flow path, and a fluid connection port. In a direct acting solenoid valve consisting of a valve body, the yoke of the electromagnet is U-shaped, and two types of notches are provided at the open end side edge of the yoke to fix the yoke cover and the valve body. , the periphery of the through-hole of the movable iron core provided in the center of the yoke lid has a half-opening protrusion structure, the end of the valve body connected to the electromagnet is square, and a cross section is formed at one opposite corner of the square. A convex edge portion is provided with a V-shaped or U-shaped groove portion, and is fitted in the yoke lid half-opened protrusion portion of the electromagnet at the center of the joint end surface of the valve body, and is formed by a notch portion of the open end side edge portion of the yoke. A direct acting solenoid valve in which the yoke cover and valve body are integrally fixed to the electromagnet body. 2. The above-mentioned utility model registration request wherein a plurality of half-open structure protrusions are provided on the yoke lid, and the same number of recesses as the small protrusions are provided on the end surface of the valve body connected to the electromagnet so as to fit with the small protrusions. Direct-acting solenoid valve described in scope 1. 3. The direct-acting electromagnetic valve according to claims 1 and 2 of the utility model registration, wherein the electromagnet and the valve body are integrally fixed at a joint portion and a synthetic resin material is integrally molded so as to cover the entire electromagnet portion.