JP2003185302A - Motor-operated valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the motor-operated valve having simple constitution, easily manufactured and attached, which may reduce a cost, change a fixed position of a component for stopping turning, and increase its fixing strength. <P>SOLUTION: This valve is equipped with a valve body 20 which adjusts a passage flow of fluid by means of a valve element 23 which is brought into contact with and separated from a valve seat 22 in a valve chest 21, a can 40 which incorporates a rotor 30 secured to the valve body and bringing the valve element into contact with and separating from the valve seat, and a stator 50 which is externally fitted to the can drives the rotor to rotate. The valve body has fluid inlet/outlet tubes 20a and 20b, and the stator has an engaging hole to be engaged with the can. A turning stopper member 59 which has two arm parts to engage with the fluid inlet/outlet tube 20b extending horizontally is secured to a lower part of the stator 50 at a plurality of portions. Therefore, a plurality of attachment holes 75d and 76 are bored at the turning stopper member 59. A plurality of projections 80 inserted in the attachment holes are formed at the lower part of the stator and the projections are selectively inserted into the attachment holes. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor-operated valve used by being incorporated in an air conditioner, a refrigerator, etc., and more particularly to a motor-operated valve having a simple structure in which a can and a stator are easily attached to a valve body. .

[0002]

2. Description of the Related Art Conventionally, a motor-operated valve incorporated and used in an air conditioner, a refrigerator, etc. of this type is a device for adjusting the flow rate of a fluid such as a refrigerant, and usually has a valve chamber and a valve seat. And a bottomed cylindrical can fixed to the upper part of the valve main body through a collar-shaped portion, the rotor has a built-in inside of the can, and the center has an outside of the can. A stator having an insertion hole is externally fitted.

FIG. 13 is a vertical sectional view of the conventional electric valve 1 as described above. The valve body 2 is provided with a valve chamber 2c, a guide bush fixing portion 2d, and a can fixing portion 2e. Fluid inlet / outlet pipes 2a, 2 into / from which a fluid such as a refrigerant flows in / out of 2c
The valve seat 2 is provided with a needle valve, which is a valve body 3a formed at the tip of the valve shaft 3 and is provided inside the valve b.
f is provided.

The guide bush fixing portion 2d is located above the valve chamber and fixes the valve body 2 and the guide bush 4 together. A female screw portion 4a is formed on the inner circumference of the guide bush 4, and a male screw portion 5a formed on the outer circumference of the valve shaft holder 5 is screwed onto the female screw portion 4a. Is configured. A valve shaft 3 having a valve body 3a formed at the lower end is slidably fitted in the valve shaft holder 5, and the valve shaft 3 is compressed in the valve shaft holder 5. The compression coil spring 3b always urges downward.

The can fixing portion 2e is located at the upper end of the valve body 2 and is made of a ring-shaped metal plate whose inner peripheral surface is caulked and fixed and whose lower end surface is joined by welding. The can 6 is fixed to the valve body 2 by being welded to the brim-shaped portion. The coupling of the valve shaft 3 and the rotor 7 is performed by fitting the valve shaft holder 5 and a sleeve or the like integrally with the valve shaft 3 and fitting the valve shaft holder 5 and the rotor 7 with a permanent magnet therein. . A push nut 3c is press-fitted and fixed to the upper end of the valve shaft 3, and a flange portion thereof is coupled to the rotor 7 while allowing the valve shaft 3 to move slightly up and down. The upper limit of the upward movement of the valve shaft 3 and the rotor 7 is set by the contact between the spring 7b provided on the upper portion of the rotor 7 and the inner surface of the can 6. A lower stopper 4b fixed to the valve shaft holder 5 and an upper stopper 5b formed on the sleeve 5a constitute a stopper mechanism.

A rotor 7 is built in the can 6,
A stator 8 is fitted on the outside of the can 6. A stator coil 8a and a yoke 8b are vertically housed inside the stator 8, and the stator coil 8a includes a lead wire 8c and a connector 8 provided on the outer circumference of the stator 8.
It is energized through d. When the stator coil 8a is energized, the yoke 8b is excited to rotate the rotor 7, and the screw feed mechanism slides the valve shaft holder 5 and the valve shaft 3 to open and close the valve body 3a to adjust the flow rate of the refrigerant. Is going. A cover 8e of the connector is welded to the stator 8.

A metal ring-shaped mounting plate 9 is fixed below the stator 8, and a detent piece 9a integrally formed with the mounting plate 9 projects horizontally from the valve body 2 into a fluid outflow pipe 2a. And the engaging hole 9b is engaged with one side of the ring-shaped welded portion between the valve body 2 and the can 6, and the pressing piece integrally formed with the mounting plate 9 on the other side of the ring-shaped welded portion. The stator 8 is fixed by pressing 9c.

[0008]

The electric valve 1 has a problem that the structure for fixing the stator 8 to the valve body 2 and the can 6 is complicated and the manufacturing is complicated. That is, a flange portion for fixing the mounting plate 9 is formed on the stator 8, and a mold for injection molding the stator 8 to form the flange portion requires a slide core, so that a large number cannot be taken. There is a problem. Further, since the mounting plate 9 is complicated and large in shape, there is a problem that the cost of the press die increases.

The present invention has been made in view of the above problems, and an object of the present invention is to simplify the structure because the stator mold does not require sliding.
An object of the present invention is to provide a motor-operated valve capable of taking many pieces. Further, another object of the present invention is to provide a motor-operated valve which has a simple structure, is easy to manufacture and mount, and can achieve cost reduction, as a rotation preventing member having two arm portions for holding a fluid inlet / outlet pipe. Further, the object of the present invention is to appropriately change the fixing position of the rotation preventing member,
Another object of the present invention is to provide a motor-operated valve that increases its fixing strength.

[0010]

[Means for Solving the Problems] To achieve the above object,
A motor-operated valve according to the present invention includes a valve main body that adjusts a flow rate of a fluid by a valve body that contacts and separates from a valve seat in a valve chamber, and a can that has a rotor that is fixed to the valve body and that contacts and separates the valve body. A stator that is externally fitted to the can and that rotationally drives the rotor, the valve body has a fluid inlet / outlet pipe, the stator has a fitting hole into which the can fits, and a lower part of the stator is provided. The rotation preventing member having two arms that engage with the fluid inlet / outlet pipe extending in the horizontal direction is fixed at a plurality of positions.

As a specific mode of the motor-operated valve according to the present invention, a plurality of mounting holes are bored in the detent member,
A plurality of protrusions to be inserted into the mounting holes are formed in the lower portion of the stator, and the protrusions are selectively inserted into the mounting holes. Further, as a specific mode of the motor-operated valve according to the present invention, the protrusion is inserted into the mounting hole, and then the protrusion is crushed to fix the detent member to the stator. Further, as a specific mode of the motor-operated valve according to the present invention, the detent member is fixed within a radial length of the stator.

The motor-operated valve of the present invention thus constructed is
By fitting the can into the fitting hole of the stator and pushing it toward the valve body, the two arm portions of the detent member fixed to the stator are engaged and held by the fluid inlet / outlet pipe in the horizontal direction. The stator can be easily attached. The mold for molding the stator does not need a slide core, and the structure can be simplified, so that a large number of molds can be obtained. Further, since the detent member is small and has a simple shape, cost reduction can be achieved.

Further, the detent member protruding from the stator can be crushed to easily fix the detent member. Also,
By fixing the anti-rotation member by embedding the anti-rotation member having a flange on the outer periphery in the hole formed in the stator and fixing the anti-rotation member, the anti-rotation member can be easily and reliably fixed. Further, the rotation preventing member can be easily fixed by inserting the set screw into the hole formed in the stator.

By forming a flat portion on the cover that covers the lead terminals of the stator and pressing the horn of the ultrasonic welder on the flat portion, the cover can be easily and surely welded to the stator. Further, the motorized valve according to the present invention,
A valve body that adjusts a flow rate of a fluid by a valve body that contacts and separates from a valve seat in a valve chamber, a can that includes a rotor that is fixed to the valve body and that separates the valve body from each other, and the can is externally fitted to the can. In a motor-operated valve having a stator that rotationally drives a rotor, the valve body has a fluid inlet / outlet pipe, the stator has a fitting hole that fits into the can, and a horizontal portion is provided at a lower portion of the stator. The rotation preventing member having two arms that engage with the fluid inlet / outlet pipe extending in the direction is fixed at a plurality of positions. Further, a plurality of mounting holes are bored in the anti-rotation member, and a plurality of protrusions to be inserted into the mounting holes are formed in a lower portion of the stator, and the mounting holes are selected and inserted. It is characterized by being done. Further, as a specific mode of the motor-operated valve according to the present invention, the protrusion is inserted into the mounting hole, and then the protrusion is crushed to fix the detent member to the stator.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a motor-operated valve according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a vertical cross-sectional view of one embodiment of the motor-operated valve according to the present invention, and FIG. 2 is a perspective view of the detent member of FIG. The motor-operated valve 10 includes a valve body 20 that adjusts the flow rate of the refrigerant passing through a valve body 23 that contacts and separates from a valve seat 22 in a valve chamber 21, and a valve body 23 fixed to the valve body 20.
A can 40 having a built-in rotor 30 for bringing the rotor 30 into and out of contact, and a stator 5 fitted on the can 40 to drive the rotor 30 to rotate.
It has 0 and. The rotor 30 and the stator 50 form a stepping motor.

The can 40 has a cylindrical shape with a bottom formed of a non-magnetic metal such as stainless steel, and is fixed to a flanged plate 41 made of stainless steel fixed to the upper portion of the valve body 20 by welding or the like. Is kept airtight. The stator 50 is composed of a yoke 51 made of a magnetic material, and upper and lower stator coils 53, 53 wound around the yoke 51 via a bobbin 52, and a fitting hole 50a to be fitted on the can 40 is formed. Has been done.

A valve body 23 composed of a needle valve is formed at the lower end of a brass valve shaft 24. The drive mechanism for moving the valve body 23 toward and away from the valve seat 22 includes a rotor 3
It is composed of a cylindrical guide bush 26 extending in the 0 direction and fixed to form a fixing screw portion 25, and a valve shaft holder 32 having a moving screw portion 31 screwed to the fixing screw portion 25 of the guide bush 26. In the rotor 30, the screw feed mechanism is arranged at a substantially central portion of the entire axial length of the rotor 30.

Therefore, as compared with a conventional motor-operated valve in which the screw feed mechanism is located below the rotor, the axial length can be greatly reduced, and the can 40 can be downsized. You can The fixing screw portion 25 is formed of a male screw on the outer circumference of the guide bush 26, and the moving screw portion 31 is formed of a female screw on the inner circumference of the valve shaft holder 32. The guide bush 26 and the valve shaft holder 32 are both made of a brass cylindrical material.

The valve shaft holder 32 has a cylindrical shape with a downward opening located outside the guide bush 26, and has the moving screw portion 31 formed on the inner surface thereof as described above.
The upper reduced diameter portion of the central valve shaft 24 is fitted in 2 and is connected by the push nut 33. The valve shaft 24 having the valve body 23 formed at the lower end is made of brass, is vertically movably fitted in the center of the valve shaft holder 32, and is constantly compressed by the compression coil spring 34 in the valve shaft holder 32. It is urged downward. A pressure equalizing hole 32 a is formed on the side surface of the valve shaft holder 32 so as to equalize the pressure inside the valve chamber 21 and the can 40.

A return spring 35 composed of a cylindrical compression coil spring is attached to the outer periphery of a push nut 33 press-fitted and fixed to the upper end of the valve shaft 24, and the fixing screw portion 25 of the guide bush 26 and the valve shaft holder 32 are moved. When the screwing with the screw part 31 is disengaged, the return spring 35 contacts the inner surface of the can 40 and urges the fixing screw part 25 and the moving screw part 31 to be screwed back. The return spring 35 is the push nut 3
It may be attached in a state where it is loosely fitted and mounted on the outer periphery of 3, and may be attached so as to be elastically contacted with the outer periphery of the push nut.

The valve body 20 is made of metal such as brass,
The joining with the can 40 is performed by butt-welding the end of the can to the stepped portion of the collar plate 41 fixed to the can by welding or the like. Not only the butt welding but also the end of the can 40 may be flatly bent on the outer periphery to form a collar-shaped portion, and the collar-shaped portion and the collar-shaped plate 41 may be fixed by so-called side welding.

The valve shaft holder 32 and the rotor 30 are connected to each other via a support ring 36. The support ring 36 is made of a brass metal ring that is inserted when the rotor 30 is molded in this embodiment. The upper protrusion of the valve shaft holder 32 is fitted into the inner peripheral hole of the support ring 36, and the outer periphery of the upper protrusion is caulked and fixed to connect the rotor 30, the support ring 36, and the valve shaft holder 32. Valve body 20, valve shaft 2
4, the guide bush 26, the valve shaft holder 32, and the support ring 36 are all made of brass as described above, and are configured in consideration of recycling.

A lower stopper body (fixed stopper) 27, which constitutes one of the stopper mechanisms, is fixed to the guide bush 26. The lower stopper body 27 is made of ring-shaped plastic and has a plate-shaped lower stopper piece on the upper side. 27a is projected. An upper stopper body (moving stopper) 37, which constitutes the other of the stopper mechanisms, is fixed to the valve shaft holder 32. The upper stopper body 37 is also made of ring-shaped plastic, and has a plate-shaped upper portion facing downward. A stopper piece 37a is provided so as to project and can engage with the lower stopper piece 27a.

The lower stopper body 27 is fixed by injection molding to the spiral groove portion 26a formed on the outer circumference of the guide bush 26, and the upper stopper body 37 is injection molded on the spiral groove 32b portion formed on the outer circumference of the valve shaft holder 32. It is fixed by. The lower stopper body 27 and the upper stopper body 37 are not limited to being fixed by injection molding, but may be fixed by adhesion, press fitting, or the like.

From the stator 50 to the stator coil 53,
A plurality of lead terminals 54 connected to 53 are projected, and a connector 56 to which a plurality of lead wires 55 are connected is connected to the lead terminals. And the connector 56
The cover 57 that covers the cover 5 is welded to the stator 50,
The inside of 7 is filled with a filler 58 such as a silicone resin.

The cover 57 is made of plastic,
As shown in FIG. 5, the upper surface portion 57a, both side surface portions 57b,
57c and a flat surface portion 57d, the connector 56
An internal space that covers the area is secured. And the stator 5
An edge portion 57e is formed on the upper surface portion and both side surface portions which are to be joined to 0, and a flat portion 57f is formed on the surface opposite to the edge portion.
Are formed.

The stator 50 has a fitting hole 5 formed in the lower surface at the center thereof.
0a, the can 40 is fitted in this fitting hole, and is fixed to the valve main body 20 and the can 40 by the detent member 59 welded to the lower surface of the stator 50. Anti-rotation member 5
In the present embodiment, 9 is made of an elastic metal plate such as stainless steel, has a horizontal base portion 60 having a mounting hole 60a, and two arm portions 61, 61 extending downward from the base portion. A positioning portion 62 extending upward from the base portion 60 is formed.

The two arm portions 61, 61 have a parallel portion extending from the base portion 60 and a curved portion continuous therebelow, and the curved portion has a radius of curvature equivalent to the diameter of the fluid inlet / outlet pipe 20b in the horizontal direction. Is formed by. The degree determining portion 62 is bent upward in a semicircular shape, and engages with a corner portion of the stator 50 to prevent the rotation preventing member 59 from rotating with respect to the protrusion 50b. The rotation stopping member 59 has the mounting hole 6
It is fixed by inserting the protrusion 50b of the stator 50 into 0a and crushing it with an ultrasonic welder or the like.

According to the motor-operated valve of this embodiment configured as described above, the stator 50 is fitted with the can 40 in its fitting hole and pushed in the direction of the valve body 20 so that the two detent members 59. The arms 61, 61 hold the horizontal fluid outflow pipe 20b, and the stator 50 is very easily and surely fixed to the valve body 20 and the can 40.
Since the whirl-stop member 59 is small and has a simple shape, it is easy to manufacture, the cost can be reduced, and the whirl-stop member 59 can be easily fixed to the stator 50.

Another embodiment of the detent member will be described with reference to FIG. FIG. 3 is a perspective view of another embodiment of the detent member. In the detent member 65 of this embodiment, a horizontal base portion 66 has a substantially ring shape, and four mounting holes 66a are formed in the ring base portion 66. The two arm portions 67, 67 extending from the base portion 66 are composed of parallel portions and curved portions as in the above embodiment, and the base portion 66 is fixed to the stator by the four mounting holes 66a. Therefore, the rotation prevention positioning portion is not formed.

Next, another fixing structure of the rotation preventing member will be described with reference to FIG. FIG. 4A is a cross-sectional view of a main part before and after fixing showing the first fixing structure, FIG. 4B is a cross-sectional view of the main part before and after fixing showing a second fixing structure, and FIG. It is a principal part sectional view before fixation and after fixation which shows a 3rd fixation structure. In FIG. 4A, the mounting hole 6 of the rotation stopping member 59
The protruding portion 50b of the stator is inserted into the stator 0a, and the protruding portion of the protruding portion is crushed by, for example, an ultrasonic welder to fix the detent member 59 to the stator 50.

In FIG. 4B, a hole 50c is formed in the stator 50 so as to correspond to the mounting hole 60a of the anti-rotation member 59, and the concave and convex portion 7 is formed on the outer periphery by knurling or the like.
0a is formed and the stopper member 70 having the collar portion 70b is embedded and fixed. The outer diameter of the stopper member 70 is set to be slightly larger than the inner diameter of the hole 50c, and is pushed into the hole 50c of the stator in a state where ultrasonic waves are applied. It In the fixing structure shown in FIGS. 4A and 4B, the resin that molds the stator is preferably a thermoplastic resin.

In FIG. 4C, a hole 50d is formed in the stator 50 so as to correspond to the mounting hole 60a, and a female screw is formed in the hole. Set screw 71 to stator hole 5
The rotation stop member 59 can be fixed to the stator 50 by inserting it into the female screw and screwing it into the female screw. A self-tapping screw may be used as the set screw 71, and the set screw 71 may be directly screwed into a hole in which a female screw is not formed. According to the respective fixing structures of the detent member 59 shown in FIG. 4, the detent member 59 can be attached to the stator 50 very easily.
Moreover, it can be securely fixed.

A lead terminal 54 is provided on the stator 50, and a flat portion 57f is formed on a cover 57 which covers the connector 56 connected to the lead terminal 54. When welding the cover 57 to the stator 50, the edge portion 57e of the joint surface is brought into contact with the stator 50, and the horn portion of the ultrasonic welder is brought into contact with the flat portion 57f and pressed in the stator direction.

As a result, the stator portion that is in contact with the edge portion 57e is melted, and the edge portion 57e melts into the stator 50, so that the cover 57 is reliably welded to the stator 50. Further, since the horn portion of the ultrasonic welder can press the flat portion 57f along the joint surface that is continuous with the upper surface portion and both side surface portions, welding can be performed easily and reliably over the entire circumference. After that, the space between the cover 57 and the stator 50 may be filled with a filling material 58 such as a silicone resin, and the connection portion between the connector 56 and the lead terminal 54 may be sealed.
Moreover, as shown in FIG. 5C, the cover 57 is formed with convex portions 57g and 57h, which act as stoppers for preventing the lead terminals 54 from coming off.

FIG. 6 is a perspective view for explaining another embodiment of the anti-rotation member 70 '. In the figure, the anti-rotation member 70' is formed of an elastic metal plate such as stainless steel, Two arm portions 72a, 7 extending to the
The first base 73 in the horizontal direction having 2b and the second base 73 continuously formed via the first base 73 and the connecting portion 74.
The second base portion 75 is parallel to the first base portion 73 in the horizontal direction and extends to the left and right longer than the first base portion 73. In addition, the second base portion 75 has an edge portion 75a adjacent to the connecting portion 74 and an edge portion 75b on the opposite side.
Is formed in an arc shape (curved portion) 72e.

Further, the two arm portions 72a, 72b are formed by the first base portion 73 and extend toward the inside of the inclined portion 72c and the inclined portion 72d, the curved portion 72f continuous therebelow, and the inclined portion toward the outside. The curved portion 72f has a radius of curvature equivalent to the pipe diameter of the fluid inlet / outlet pipe 20b in the horizontal direction. A mounting hole 76 is provided from the first base portion 73 to the connecting portion 74, and a mounting hole 75d is provided in the extending portion 75c of the second base portion 75.

The rotation preventing member 7 thus constructed
According to 0 ', the stator 50 is fitted with the can 40 in its fitting hole 50a and pushed in toward the valve body 20, whereby the curved portions 72e of the two arm portions 72a, 72b of the detent member 70' are respectively bent. , 72e hold the horizontal fluid inlet / outlet pipe 20b, and the stator 50 is easily and surely fixed to the valve body 20. Moreover, when the stator 50 is fixed to the valve body 20, as shown in FIG.
It is fixed by inserting it into three of the plurality of protrusions 80 formed at a predetermined interval around the fitting hole 50a on the lower surface of 0 and crushing the protruding portion of the protrusion 80 with, for example, an ultrasonic welder. Note that FIG. 7 is a vertical cross-sectional view in which the can 40, its internal configuration, and the valve body are omitted.

FIG. 8 is a view for explaining a state in which the rotation stopping member 70 'is fixed to the lower portion of the stator 50, and is a view of FIG. 7 viewed in the direction of the arrow. In FIG. 8, three (80 in FIG. 8) protrusions 80 formed integrally with the stator 50 at predetermined intervals around the fitting hole 50a of the stator 50 are provided with the rotation preventing member 70. The mounting holes 75d and 76 of the'rotation member 70 'are inserted into the arc portion 75e of the rotation stopping member 70' along the circumferential edge of the fitting hole 50a. In addition, 80 'of FIG. 8 is a mounting hole 76 and a mounting hole 75d.
It is shown in a state in which it has been inserted into and is crushed by the ultrasonic welder. Further, in the present invention, when fixing the rotation preventing member 70 'and the protrusion 80, it is needless to say that the fixing strength can be increased by setting the diameter of the shaft of the protrusion 80 large.

Moreover, in the present invention, by bringing the fixing position of the rotation stopping member 70 'close to the protrusion 80,
The rotation preventing member 70 'can reduce the load acting on the protrusion 80. That is, in FIG. 7 and FIG.
Due to the fixed position of the anti-rotation member 70 ′ on the protrusion 80, a part of the anti-rotation member 70 ′ is outside the radial length of the stator 50, whereas in FIGS.
In the fixed position of the anti-rotation member 70 ″ with the protrusion 80, the anti-rotation member 70 ″ exists within the radial length of the stator 50 as shown in the figure, and This can be brought closer to the fixed projection 80, and as a result, the load acting on the projection 80 can be reduced.
0, the same reference numerals are given to the same components as those of the embodiment shown in FIGS. 7 and 8, and the description thereof will be omitted.

According to this embodiment, by providing a plurality of protrusions at predetermined intervals around the fitting hole on the lower surface of the stator 50, it is possible to change the protrusion into which the mounting hole is inserted. The effect that the fixing position of the member can be freely changed in the circumferential direction of the fitting hole can be achieved, and further, since the rotation stopping member can be fixed at a plurality of places, the fixing strength can be increased.

Further, in the present invention, when the stator is molded with a thermoplastic resin, by providing a convex portion at a portion which becomes a resistance to the flow of the resin flowing to the pole tooth portion forming the stator coil in the stator, The resin can be made to flow easily. That is, in the embodiments shown in FIGS. 9 and 10, the convex portions P are provided as shown in FIGS. 11 and 12, respectively. Note that FIG.
1 and 12, the same components as those of the embodiment shown in FIGS. 9 and 10 are designated by the same reference numerals and the description thereof is omitted. With such a configuration, the resin flows between the convex portions P and becomes easy to flow. The pole tooth portion is omitted in FIG. 11.

[0043]

As can be understood from the above description, in the motor-operated valve of the present invention, the stator can be easily attached to the valve body and the can. Moreover, the structure can be simplified and the cost can be reduced. The detent member for holding the stator on the fluid inlet / outlet pipe of the valve body can be easily and surely fixed to the stator. The cover that covers the lead terminals and the connector of the stator can be easily and reliably welded. Further, in the motor-operated valve of the present invention, the fixing position of the detent member can be changed and the fixing strength can be increased.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an embodiment of a motor-operated valve according to the present invention.

FIG. 2 is a perspective view of the rotation stopping member of FIG.

FIG. 3 is a perspective view of another embodiment of the detent member.

4A is a cross-sectional view of a main part before and after fixing showing a first fixing structure of a rotation preventing member, and FIG. 4B is a front and after fixing showing a second fixing structure of a rotation preventing member. Cross section of the main part of
(C) is sectional drawing of the principal part before and after fixing which shows the 3rd fixing structure of a rotation stop member.

5A is a sectional view of the cover, FIG. 5B is a front view of the cover, FIG. 5C is a bottom view of the cover, and FIG. 5D is an enlarged sectional view of an edge portion.

FIG. 6 is a perspective view showing another embodiment of the rotation stopping member.

FIG. 7 is a vertical cross-sectional view showing a fixed state of the detent member of the embodiment shown in FIG.

8 is a state explanatory view showing a lower portion of the stator of the embodiment shown in FIG.

FIG. 9 is a vertical cross-sectional view showing a fixed state of a detent member according to another embodiment of the present invention.

FIG. 10 is a state explanatory view showing the lower portion of the stator of the embodiment shown in FIG.

FIG. 11 is a vertical cross-sectional view illustrating a mold of the motor-operated valve of the present invention.

FIG. 12 is a state explanatory view showing a lower portion of the stator shown in FIG.

FIG. 13 is a vertical cross-sectional view of a conventional electric valve.

[Explanation of symbols]

1 ... Motorized valve (conventional example) 2 ... Valve body 2
a, 2b ... Fluid inlet / outlet pipe 2c ... Valve chamber 2d ... Guide bush fixing portion 2e ... Can fixing portion 2f ... Valve seat 3 ... Valve shaft 3a ... Valve body 3b
... Compression coil spring 3c ... Push nut 4 ... Guide bush 4a ... Female thread 4b
... Lower stopper 5 ... Valve shaft holder 5a ... Male thread 5b
... Upper stopper 6 ... Can 7 ... Rotor 7b
・ ・ ・ Spring 8 ・ ・ ・ Stator 8a ・ ・ ・ Stator coil
8b ... Yoke 8c ... Lead wire 8d ... Connector 8
e ... Cover mounting plate 9 ... Mounting plate 9a ... Rotation stop piece 9
b ... Engagement hole 9c ... Pressing piece 10 ... Electric valve (present invention) 20 ... Valve body 20a, 20b ... Fluid inlet / outlet pipe 21 ... Valve chamber 22 ... Valve seat 23 ... Valve Body 24 ... Valve shaft 2
5 ... Fixing screw part 26 .. Guide bush 26a .. Spiral groove part 27 .. Lower stopper body (fixed stopper) 2
7a..Lower stopper piece 30..Rotor 31..Movement screw part 3
2 · · Valve shaft holder 32a · · Pressure equalizing hole 32b · · Helical groove 3
3 ... Push nut 34 ... Compression coil spring 35 ... Return spring 3
6 ・ ・ Support ring 37 ・ ・ Upper stopper body (moving stopper) 37a ・ ・
Upper stopper piece 40 ··· Can 41 · · Collar plate 50 · · Stator 50a · · Fitting hole 50
b ・ ・ Protrusion 50c ・ ・ Hole 50d ・ ・ Hole 51 ・ ・ Yoke 52 ・ ・ Bobbin 53
..Stator coil 54..Lead terminal 55..Lead wire 56
..Connector 57..cover 57a..top surface 57
b, 57c ... Both side surface portions 57d .. Flat surface portion 57e .. Edge portion 57
f ... Flat part 57g, 57h ... Convex part 58 ... Filler 59
..Rotation stop member 60..Base 60a..Mounting hole 61
..Arms 62..Position (degree) determining part 65 ..
66 .. Base 66a .. Mounting hole 67 .. Arm 70 .. Stop member 70a ..
b ... Collar portion 70 ', 70 "... Rotation stop member 71 ... Set screw 72a, 72b ... Arm portion 72c, 72d ... Inclined portion 72e, 72f.
-Curved portions 72g, 72h-Inclined portion 73- (First) base portion 74-Connecting portion 75- (Second) base portion 75a-Edge portion
75b ·· Edge 75c · · Extending part 75d · · Mounting hole 76 · · Mounting hole 80 · · Projection 80 ′ · · · Projection P (after being crushed) P · ·

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takeshi Suganuma             Setagaya-ku, Tokyo Todoroki 7-1724 shares             Ceremony company Fuji Kouki F term (reference) 3H062 AA02 AA15 BB30 BB31 CC02                       DD01 EE06 FF41 GG06 HH04                       HH08 HH09

Claims (4)

[Claims] 1. A valve body for adjusting a flow rate of a fluid by a valve body which comes into contact with and separates from a valve seat in a valve chamber, a can which has a rotor fixedly attached to the valve body to bring the valve body into and out of contact, and the can. A motor-operated valve including a stator that is externally fitted to and that drives the rotor to rotate, wherein the valve body has a fluid inlet / outlet pipe, and the stator has a fitting hole that fits into the can. An electrically operated valve, wherein a plurality of detent members having two arms engaging with the fluid inlet / outlet pipe extending in the horizontal direction are fixed to the lower portion at a plurality of positions. 2. The rotation preventing member is provided with a plurality of mounting holes, a plurality of protrusions to be inserted into the mounting holes are formed in a lower portion of the stator, and the mounting holes have the protrusions. The motor-operated valve according to claim 1, which is selectively inserted. 3. The motor-operated valve according to claim 1, wherein a protrusion is inserted into the mounting hole and then the protrusion is crushed to fix the detent member to the stator. 4. The motor-operated valve according to claim 3, wherein the detent member is fixed within the radial length of the stator.