JPH0711888U - Electric flow control valve - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide an electric flow control valve that can reduce the number of steps for assembling a stator and can easily attach the stator to a rotor case. A rotor case 2 fixed to a valve body 1 for accommodating a rotor therein, and an annular stator 5 having a central hole 6 inserted and fitted into the rotor case 2 and having a coil housed therein are provided. In the electric flow control valve in which the valve is opened and closed by the rotation of the rotor due to the energization and excitation of the stator coil, the stator 5 is provided with a plurality of locking projections 13 above the central hole 6.
The rotor case 2 is integrally formed with a synthetic resin, and a plurality of engaging recesses 3 and 4 are provided on the outer peripheral portion of the upper portion of the rotor case 2 so that the protruding portions 13 and 14 can engage with each other. Four
It is characterized in that the stator 5 is prevented from rotating and coming off by fitting the locking projections 13 and 14 with each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric flow control valve used in an air conditioner or a refrigeration system.

[0002]

[Prior art]

 Conventionally, as an electric flow rate control valve provided with a locking means for preventing the stator from coming out of the rotor case and preventing rotation, Japanese Patent Publication No. 2-6299 (hereinafter, referred to as an electric flow rate control valve of prior art 1) and an actual flow rate control valve are disclosed. The technique disclosed in Japanese Patent Publication No. 3-10446 (hereinafter referred to as an electric flow rate control valve of Conventional Technique 2) is known.

[0003]

[Problems to be solved by the device]

 The electric flow control valve of the prior art 1 has a method in which an engaging recess is formed in the outer peripheral portion of the rotor case, and an elastic body having an engaging protrusion engageable with the engaging recess is welded to the upper portion of the stator. Since it is mounted by using, the elastic body of the second member is required for the rotation prevention of the stator, and the number of parts is large, and there is a problem that it takes man-hours to mount this elastic body.

Further, the electric flow control valve of the prior art 2 uses a resin-molded special-shaped rotation stopper to prevent the stator from coming out of the rotor case and to prevent the rotation of the stator. Since a rotation stopper was required, there were many problems in the number of parts and the assemblability of the stator.

The present invention has been devised in order to solve the above-mentioned conventional problems, and its purpose is to reduce the man-hours for assembling the stator and to easily mount the stator on the rotor case. To provide the electric flow control valve.

[0006]

In order to achieve the above-mentioned object, an electric flow control valve of the present invention is a synthetic resin having a stator with a built-in coil and a plurality of locking projections at the upper part of the central hole. It is composed of an integrally molded product, and a plurality of engaging recesses are provided on the outer peripheral part of the upper part of the rotor case.The engaging recesses and locking projections are fitted together to prevent the stator from rotating and retaining. It is characterized in that

[0007]

[Action]

 In the electric flow control valve having the above-mentioned structure, the stator is attached to the rotor case by fitting the plurality of locking projections integrally molded with the stator with the plurality of engaging recesses formed in the rotor case. Can be easily performed, and the number of steps for assembling the stator can be reduced.

[0008]

【Example】

 An embodiment of the present invention will be specifically described below with reference to the drawings. In the figure, reference numeral 1 denotes a valve body having a fluid inlet passage 1a and a fluid outlet passage 1b provided therein with a valve seat (not shown) for connecting and disconnecting a needle valve, and 2 denotes a valve body fixed to the valve body 1 and having a permanent magnet inside. A closed cylindrical rotor case 5 for accommodating a rotor (not shown) is a ring-shaped stator having a central hole 6 and a central projecting port 7 which are inserted and fitted into the rotor case 2. A coil 8 and a yoke 9 are housed inside as shown in FIG. 3, and a needle valve (not shown) is opened and closed by rotating the rotor by energizing and exciting the stator coil 8.

Therefore, the present invention is an integrally molded product of synthetic resin having the above-mentioned structure, in which the stator 5 is provided with a plurality of engaging projections 13 and 14 in the upper part of the central hole 6. A plurality of engaging concave portions 3 and 4 which can be engaged with the convex portions 13 and 14 are provided on the outer peripheral portion of the upper end of the rotor case 2, and the engaging concave portions 3 and 4 and the locking convex portions 13 and 14 are formed. The fitting prevents the stator 5 from rotating and coming off.

Although the two engaging recesses 3 and 4 and the engaging protrusions 13 and 14 that face each other at the 180-degree position are shown, the number is not limited to two. It may be three or four.

[0011]

[Effect of device]

 According to the electric flow control valve of the present invention, by fitting a plurality of engaging convex portions integrally molded with the stator with a plurality of engaging concave portions formed on the rotor case, the stator of the stator relative to the rotor case can be formed. It has an excellent practical effect that it can be easily mounted without the second member as in the conventional case and the number of steps for assembling the stator can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an electric flow control valve according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an assembled state of the control valve.

FIG. 3 is a sectional view of an essential part of a stator used in the electric flow control valve of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Valve main body, 2 ... Rotor case, 3, 4 ... Engagement concave part, 5
... Stator, 6 ... Center hole, 7 ... Center protruding port, 8 ... Coil, 13, 14 ... Locking protrusion.

Claims (1)

[Scope of utility model registration request] 1. A stator comprising: a rotor case fixed to a valve main body for accommodating a rotor therein; and an annular stator having a center hole inserted and fitted into the rotor case and having a coil housed therein. In an electric flow control valve that opens and closes by rotor rotation due to energization of a coil, the stator is made of a synthetic resin integrally molded product having a plurality of locking projections in the upper part of the central hole, and the outer periphery of the upper part of the rotor case A plurality of engaging recesses that can be engaged with the protrusions are provided in the portion, and the stator is prevented from rotating and coming off by fitting the engaging recesses and the engaging protrusions. Control valve.