JP3163262B2 - Structure of motorized valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronically controlled expansion valve used in a refrigeration cycle of a room air conditioner or a car air conditioner, or an electric control valve used as a proportional control valve used in combination with a microcomputer in general industrial fields. Related to the valve,
In particular, the present invention relates to a structure of a motor-operated valve in which a stator coil 6 can be attached to and detached from a valve body 1 with one touch.

[0002]

2. Description of the Related Art FIGS.
It is a longitudinal section and a bottom view showing a conventional electric structure proposed in Japanese Patent No. 5083. The motor-operated valve includes a valve body 1, a body 8, a case 9, and a lid 10. In the case 9, a valve shaft 3 having a needle valve 3a is housed integrally with a rotor 4. I have.

[0003] The stator coil 6 is formed by a resin molding material 12 or the like. An arc-shaped block is formed on the lower surface of the stator coil 6 to the left as shown in FIGS. Engagement protrusions 6a, 6a, 6a
Further, an engagement protrusion 6a formed in a rectangular block on the right side and having a right end surface as a contact surface 6c is provided with the resin molding material 1 as shown in FIG.
2 and are provided integrally. A groove 6b for locking a hook 7, which will be described later, is provided at the back of each of the engagement protrusions 6a.
Is provided.

The hook 7 is made of an elastic body having two engaging projections 7a formed in a semicircular shape.
Each of the grooves 6 provided in the engagement protrusions 6a, 6a, 6a
b can be detachably fixed. on the other hand,
The cylindrical surface of the body 8 inserted into the hole of the stator coil 6 is provided with a ring-shaped concave groove 8b for fitting the hook 7 therein.

In this conventional electric valve assembly, as shown in FIG. 6, first, a hook 7 is connected to an engaging projection 6 of a stator coil 6.
a, 6a, and 6a are inserted into the groove 6b and fixed detachably. Next, when the stator coil 6 is pushed from above the valve body 1 until the recess 8b of the body 8 and the engaging projection 7a of the hook 7 made of an elastic body are fitted, the axial direction is fixed and the body is flattened. Part 8c (for example, one surface of hexagonal material)
And the contact surface 6c of the engaging projection 6a abuts and is also fixed in the circumferential direction. Further, when the stator coil 6 is pulled upward, the ring-shaped concave portion 8b provided on the cylindrical surface of the body 8 and the engaging projection 7a of the hook are released, and the valve body 1 and the stator coil 6 can be detached.

[0006]

However, the conventional method of fixing using the hook 7 has an advantage that the valve body 1 and the stator coil 6 can be detached with a single touch, but the engaging projection is formed when the stator coil is formed. Because of the groove 6b provided in the portion 6a, a mold that opens and closes in the vertical direction and a slide mold in the horizontal direction perpendicular to the mold are required, which is a complicated mold structure. For this reason, there has been a problem that the cost of the mold is high and the molding cost is high because a large number of individual pieces cannot be obtained. Furthermore, body 8
In order to cut a thick hexagonal material, both material cost and processing cost were expensive.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is not a complicated slide-type structure in a horizontal direction when forming a stator coil, but a vertical opening and closing of a mold. A simple mold structure is provided by providing a groove in the direction, an L-shaped bracket is attached to the groove, and the valve body is made of an inexpensive thin round material. This valve body has a hollow to be engaged with the L-shaped bracket. An object of the present invention is to provide a structure of a motor-operated valve in which a stator coil can be attached and detached with a simple and inexpensive structure by providing a disk-shaped plate.

That is, the structure of the motor-operated valve of the present invention comprises a valve body 1 having a body 8 below a case 9 having a rotor 4 therein, and a cylindrical stator coil 6 having a coil 5 therein. In the motor-operated valve in which the both are detachably fixed, longitudinal grooves 14, 14 are provided on both sides of a connector portion 13 provided on the side of the stator coil 6, and the longitudinal grooves 14, 14 are provided.
14 has two engaging pieces 11 which are notched in a vertical surface.
b, 11b are provided, a locking claw 11a is provided at the upper end of the engaging piece, and the engaging pieces 11b, 11b of the L-shaped bracket 11 provided with an engaging projection 11c are provided on the bottom face. On the other hand, on the outer surface of the valve body 1, a hollow disk-shaped member is provided with an engagement hole 15 a at a position corresponding to the engagement protrusion 11 c at a position where the lower surface of the stator coil 6 abuts. The plate 15 is fixed by, for example, brazing, the case 9 of the valve body 1 is fitted into the hole of the stator coil 6, and the stator coil 6 is rotated to engage the engaging projection 11c of the bracket 11.
And an engagement hole 15a of the plate 15 is elastically detachably fitted.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the structure of the motor-operated valve according to the present invention. FIG. 2 is a longitudinal side view and FIG. 3 is a bottom view. The motor-operated valve according to the present invention includes a valve body 1, a body 8, a case 9, and a lid 10.
Although the valve shaft 3 provided with "a" is housed integrally with the rotor 4, the detailed description of this point is omitted because it is the same as the conventional product.

The stator coil 6 of the present invention is formed by a resin molding material 12 or the like, and a connector 13 is provided on the side of the stator coil 6 as shown in FIGS. It is provided integrally with the resin molding material 12. Also,
On the left and right sides of the connector section 13, there are provided longitudinal grooves 14, 14 into which brackets 11 to be described later are fitted.

The L-shaped bracket 11 is a thin metal plate having a vertical surface and a bottom surface. The bracket 11 is provided with two engaging pieces 11b, 11b by cutting the vertical surface. A locking claw 11a is provided at the upper end of the mating piece toward the inside. An engagement protrusion 11c is provided on the bottom surface at a position away from the center. The bracket 11 has a pair of longitudinal grooves 14, 1 in which the engagement pieces 11 b, 11 b are provided in the connector portion 13 of the stator coil 6.
4 and the stator coil 6
It is stuck to.

The hollow disk-shaped plate 15 has an engagement hole 15 at a position corresponding to the engagement projection 11c of the bracket 11.
The plate 15 is fixed by brazing on the outer surface of the valve body 1 and at a position where the lower surface of the stator coil 6 abuts. In addition, 15b is
This is a notch to reduce the weight of parts.

Next, the assembly of the stator coil 6 and the valve body 1 will be described with reference to FIG. First, the case 9 of the valve body 1 is fitted into the hole of the stator coil 6. Next, by rotating the stator coil 6 by hand, the engaging projection 11c of the bracket 11 and the engaging hole 15a of the plate 15 are elastically fitted.

[0014]

As described above, the motor-operated valve of the present invention realizes one-touch attachment / detachment of the valve body 1 and the stator coil 6 with a simple structure. Since a small round bar is sufficient, both material cost and processing cost are low. Further, the stator coil 6 which conventionally required a complicated forming die may be a simple forming die, and a large number of pieces can be formed, so that the mold cost and the forming cost are reduced. Since the cost of the motor-operated valve can be significantly reduced by these, the present invention is industrially useful.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a bottom view showing one embodiment of the present invention.

FIG. 3 is a perspective view illustrating an assembly state of the present invention.

FIG. 4 is a longitudinal sectional view showing an embodiment of a conventional motor-operated valve.

FIG. 5 is a bottom view showing an example of a conventional motor-operated valve.

FIG. 6 is a perspective view illustrating an assembly state of a conventional motor-operated valve.

[Explanation of symbols]

1 Valve body. 2 Door pipe. 3
Valve stem. 3a Needle valve. 3b Male thread.
4 Rotor. 5 coils. 6 Stator coil. 6a Engagement projection. 6b groove
6c Hit surface. 6d Hemispherical projection. 7 Hook. 8 Body. 8a Valve seat.
8b Recess. 8c Flat part. 9 cases.
10 lids. 10a Female thread. 11 Bracket. 11a Locking claw. 11b Engagement piece.
11c Engagement projection. 12 Resin molding material. 13 Connector part. 14 flutes.
15 plates. 15a Engagement hole. 15b Notch.

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16K 31/00-31/05 F25B 41/06

Claims (1)

(57) [Claims] An electric motor comprising a valve body provided with a body below a case containing a rotor and a cylindrical stator coil containing a coil, the two being detachably fixed to each other. In the valve, a connector portion 13 provided on a side portion of the stator coil 6
Longitudinal grooves 14, 14 are provided on both sides of the groove. The longitudinal grooves 14, 14 are provided with two engaging pieces 11b, 11b formed by notching a vertical surface in a concave shape. A stop claw 11a is provided, and an engagement protrusion 11c
The engagement piece 11 of the L-shaped bracket 11 provided with
On the other hand, an engagement hole 15a is provided on the outer surface of the valve body 1 at a position where the lower surface of the stator coil 6 abuts, at a position corresponding to the engagement protrusion 11c. Hollow disk-shaped plate 15
The case 9 of the valve body 1 is fitted into the hole of the stator coil 6, and the stator coil 6 is rotated to resiliently engage the engaging projection 11 c of the bracket 11 and the engaging hole 15 a of the plate 15. A structure of a motor-operated valve which is detachably fitted.