KR100889016B1 - Motor operated valve - Google Patents

Abstract

It provides an electric valve that is simple in configuration, easy to manufacture and attach, and can achieve cost reduction. The fixing position of the stop member can be changed, thereby increasing the fixing strength.

The rotor body which contacts and separates the valve body 20 which adjusts the flow volume of a fluid by the valve body 23 which contacts and isolates the valve seat 22 in the valve chamber 21, and the valve body fixed to the valve body. A can 40 having a built-in 30 and a stator 50 which is wound around the can and rotates the rotor are provided. The valve body has fluid inlet and outlet pipes 20a and 20b, and the stator has fitting holes to which the can fits. In the lower part of the stator 50, the stop member 59 which has two arm parts engaging with the fluid inlet / out tube 20b extended in the horizontal direction is fixed in several places. For this purpose, a plurality of mounting holes 75d and 76 are laid in the stop member 59, and a plurality of projections 80 are inserted into the mounting holes in the lower portion of the stator, and the mounting holes are selected and inserted into the mounting holes. .

Description

Electric valve {MOTOR OPERATED VALVE}

1 is a longitudinal cross-sectional view of an embodiment of an electric valve according to the present invention.

Figure 2 is a perspective view of the stop member of Figure 1;

3 is a perspective view of another embodiment of a stop member.

Fig. 4A is a sectional view of the main part before and after fixing showing the first fixing structure of the stop member, and Fig. 4B is a sectional view of the main part before and after fixing showing the second fixing structure of the stopping member, and Fig. 4C is a third fixing structure of the stopping member. Sectional view of the main part before and after the fixing.

5A is a sectional view of the cover, FIG. 5B is a cover front view, FIG. 5C is a cover bottom view, and FIG.

6 is a perspective view showing another embodiment of the stop member;

The longitudinal cross-sectional view which shows the fixed state of the stopping member of embodiment shown in FIG.

FIG. 8 is a state explanatory diagram showing a lower portion of the stator of the embodiment shown in FIG. 6. FIG.

9 is a longitudinal sectional view of a conventional electric valve.

*** Explanation of symbols for the main parts of the drawing ***                 

1 Electric valve (conventional example)

2 valve body

2a, 2b fluid inlet and outlet pipe

2c valve chamber

2d guide bush fixing

2e can fixings

2f valve seat

3 valve shaft

3a valve body

3b compression coil spring

3c push nut

4 guide bush

4a female thread

4b bottom stopper

5 valve shaft holder

5a male

5b phase stopper

6 cans

7 rotor

7b spring                 

8 stator

8a stator coil

8b yoke

8c lead wire

8d connector

8e cover

9 Mounting Edition

9a stop

9b engagement hole

9c push

10 electric valve (invention)

20 valve body

21 valve chamber

23 valve body

24 valve shaft

25 fixing thread

26 guide bush

26a helix groove part

27 Lower stopper body (fixed stopper)

27a lower stopper                 

30 rotor

31 Moving thread

32 valve shaft holder

32a equalization hole

32b helix groove

33 push nuts

34 compression coil spring

35 return spring

36 support ring

37-phase stopper sieve (moving stopper)

37a phase stopper

40 cans

41 color plates

50 stator

50a fitting hole

50b protrusion

50c hole

50d hole

51 York

52 bobbin                 

53 stator coil

54 lead terminals

55 lead wire

56 connectors

57 cover

57a top

57b, 57c both sides

57d flat part

57e edge

57f flat part

57g, 57h convex

58 filling material

59 stopping member

60 donation

60a mounting hole

61 dark

62 position (degrees)

65 stop member

66 donation

66a mounting hole                 

67 dark

70 fixing member

70a irregularities

70b Calabu

71 Set Screw

70 'stop

72a, 72b elastic arm

72c, 72d slope

72e, 72f bend

72g, 72h slope

73 (First) Donation

75 (Second) Donation

75a edge

75b edge

75c extended part

75d mounting hole

76 mounting hole

80 turning

80 'protrusion (after crushing)

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric valve for use in an air conditioner, a refrigerator or the like, and more particularly, to an electric valve having a simple structure and easy installation of a stator to a can and a valve body.

BACKGROUND ART [0002] Conventionally, electric valves assembled and used in such air conditioners, refrigerators, and the like are devices for adjusting the flow rate of a fluid such as a refrigerant, and usually include a valve body having a valve chamber and a valve seat, and a collar member. In addition, a bottomed cylindrical can fixed to the upper portion of the valve body is provided, and a rotor is built in the inside of the can, and a stator having an insertion hole in the center of the can is externalized.

Fig. 9 shows a longitudinal cross-sectional view of the conventional electric valve 1 as described above, and the valve body 2 includes the valve chamber 2c, the guide bush fixing part 2d, and the can fixing part 2e. The valve chamber 2c is provided with fluid inlet and out pipes 2a and 2b through which fluid such as a refrigerant flows in and out, and a needle valve, which is a valve body 3a formed at the tip of the valve shaft 3, is provided therein. A valve seat 2f for contacting and separating is provided.

The guide bush fixing portion 2d is located above the valve chamber to fix the valve body 2 and the guide bush 4. A female threaded portion 4a is formed on the inner circumference of the guide bush 4, and a male threaded portion 5a formed on the outer circumference of the valve shaft holder 5 is screwed on the female threaded portion 4a, and a female threaded portion and a male threaded portion The screw dispensing mechanism is comprised by this. Moreover, the valve shaft 3 which forms the valve body 3a in the lower end part in this valve shaft holder 5 is slidably inserted, and the said valve shaft 3 is in the valve shaft holder 5 It is always elastically supported below by the compression coil spring 3b installed while being compressed.

The can fixing part 2e is located in the upper end of the valve main body 2, and consists of a ring-shaped metal plate in which the inner peripheral surface is caulking fixed and the lower surface is joined by welding, and the color of the can 6 is formed in the outer peripheral part. The can 6 is fixed to the valve main body 2 by welding with a part. The coupling of the valve shaft 3 and the rotor 7 is coupled by externally enclosing the integral moldings such as the valve shaft holder 5 and the sleeve on the valve shaft 3 and internally by the rotor 7 with the permanent magnet. have. The push nut 3c is pushed in and fixed to the upper end of the valve shaft 3, and the collar part is engaged with the rotor 7 while allowing the valve shaft 3 to move up and down slightly. In addition, the uppermost movement of the valve shaft 3 and the rotor 7 is made by the contact between the spring 7b provided on the upper part of the rotor 7 and the inner surface of the can 6. A stopper mechanism is constituted by a lower stopper 4b fixed to the valve shaft holder 5 and an upper stopper 5b formed on the sleeve 5a.

The rotor 7 is built in the can 6, and the stator 8 is externally wound on the outside of the can 6. The stator coil 8a and the yoke 8b are stored in the stator 8 up and down, and the stator coil 8a is connected to the lead wire 8c and the connector 8d provided on the outer periphery of the stator 8. It is energized. The yoke 8b is excited by energization of the stator coil 8a to rotate the rotor 7, and the valve body 3a is opened by sliding the valve shaft holder 5 and the valve shaft 3 by a screw sending mechanism. The flow rate of the refrigerant is adjusted by opening and closing. The cover 8e of the connector is welded to the stator 8.                         

The fluid outflow which fixes the ring-shaped mounting plate 9 made of metal to the lower side of the stator 8, and protrudes the stopping piece 9a formed integrally with the mounting plate 9 from the valve body 2 in the horizontal direction. While engaging the pipe 2a, the engagement hole 9b is engaged with one side of the ring-shaped welded portion of the valve body 2 and the can 6, and the other side of the ring-shaped welded portion integrally with the mounting plate 9. The formed pressing piece 9c is pressed to fix the stator 8.

 By the way, the electric valve 1 has a problem that the configuration of fixing the stator 8 to the valve body 2 and the can 6 is complicated, and the manufacturing is complicated. That is, the stator 8 is provided with a flange portion for fixing the mounting plate 9, and a mold for injection molding the stator 8 in order to form the flange portion requires a slide core, so that a large number cannot be obtained. There is a problem. In addition, 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 thereof is to provide a motorized valve capable of simplifying the structure and obtaining a large number of pieces because the mold of the stator may not require a slide. have. In addition, the stop member having two arm portions for holding the fluid inlet and outlet pipe is to provide an electric valve that is simple in configuration, easy to manufacture and install, and can achieve a cost reduction.

It is also an object of the present invention to provide an electric valve in which the fixing position of the stop member can be appropriately changed and the fixing strength thereof is increased.

In order to achieve the above object, the electric valve according to the present invention is a valve body for adjusting the flow rate of the fluid by the valve body in contact with and separate from the valve seat in the valve chamber, and fixed to the valve body to contact the valve body. A can incorporating a rotor to be separated, and a stator externally wound to the can, the valve body having a fluid inlet and outlet pipe, the stator having a fitting hole to which the can fits, In the lower part of the stator, it is characterized in that a stop member having two arm portions engaging with the fluid entry and exit pipe extending in the horizontal direction is fixed at a plurality of places.

In a specific aspect of the electric valve according to the present invention, a plurality of mounting holes are formed in the stop member, a plurality of projections are formed in the lower portion of the stator, and the projections are inserted into the mounting holes. It is characterized by being inserted.

In addition, as a specific aspect of the electric valve concerning this invention, after inserting a processus | protrusion into the said installation hole, the processus | protrusion is crushed, and the said stop member is fixed to the said stator, It is characterized by the above-mentioned.

In the electric valve of the present invention configured as described above, by fitting the can into the fitting hole of the stator and pushing the can in the direction of the valve body, the two arms of the stop member fixed to the stator are engaged with and held in the fluid inlet and outlet pipe in the horizontal direction. The stator can be easily installed in the valve body. Moreover, since the metal mold | die which forms the stator does not need a slide core and can simplify a structure, many can be obtained. In addition, since the stop member is small and simple in shape, cost reduction can be achieved.                         

In addition, the stopper can be easily fixed by crushing the protruding portion protruding from the stator. In addition, the fixing of the stopping member can be easily and secured by forming an uneven portion in the outer periphery of the hole formed in the stator and pushing the fixing member having the collar portion to fix the stopping member. In addition, the stopper can be easily fixed by inserting a set screw into the hole formed in the stator.

By forming a flat portion on the cover covering the lead terminals of the stator and pressing the horn of the ultrasonic welder on the flat portion, the cover can be easily and reliably welded to the stator.

Moreover, the electric valve which concerns on this invention is a valve body which adjusts the flow volume of a fluid by the valve body which contacts and isolates the valve seat in a valve chamber, and the rotor which adheres to the valve body, and contacts and isolates the valve body. A motorized valve including a can to be built-in and a stator that is wound around the can and rotationally drives the rotor, wherein the valve body has a fluid inlet and outlet, and the stator has a fitting hole fitted to the can. The stop member which has two arm parts which extend in a horizontal direction and engage with the said fluid entrance-and-exit pipe | tube is fixed in several places at the lower part of.

The stop member is provided with a plurality of mounting holes, and a plurality of projections are formed in the lower portion of the stator, and the projection holes are inserted into the mounting holes.

A specific aspect of the electric valve according to the present invention is characterized in that the stopping member is fixed to the stator by crushing the projection after inserting the projection into the installation hole.

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of the electric valve which concerns on this invention is described in detail based on drawing. BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view of one Embodiment of the electric valve which concerns on this invention. FIG. 2 is a perspective view of the stopping member of FIG. The electric valve 10 is fixed to the valve body 20 and the valve body 20 for adjusting the flow rate of the refrigerant by the valve body 23 contacting and separating the valve seat 22 in the valve chamber 21. And a can (40) incorporating a rotor (30) for contacting and separating the valve body (23), and a stator (50) which is wound around the can (40) and rotates and drives the rotor (30). The rotor 30 and the stator 50 constitute a stepping motor.

The can 40 has a bottomed cylindrical shape formed of a nonmagnetic metal such as stainless, and is fixed by welding or the like to the color plate 41 made of stainless, which is fixed to the upper portion of the valve body 20, The interior is kept confidential. The stator 50 is composed of a yoke 51 made of a magnetic material, and upper and lower stator coils 53 and 53 wound around the yoke 51 via a bobbin 52 and fitted to the can 40. The hole 50a is formed.

The valve body 23 composed of the needle valve is formed at the lower end of the valve shaft 24 made of brass. The driving mechanism for contacting and separating the valve body 23 with the valve seat 22 is a conventional guide bush 26 formed with a fixed screw portion 25 extending from the valve body 20 in the direction of the rotor 30 and fixed thereto. And a valve shaft holder 32 or the like having a moving screw portion 31 screwed to the fixing screw portion 25 of the guide bush 26, wherein the screw feeding mechanism is disposed in the rotor 30. It is arrange | positioned about the center part of the full length of an axial direction.

For this reason, compared with the position of the screw delivery mechanism located below the rotor like the conventional electric valve, the length of an axial direction can be reduced significantly and the can 40 can be miniaturized. The fixing screw part 25 is comprised by the male screw on the outer periphery of the guide bush 26, and the moving screw part 31 is comprised by the female screw on the inner periphery of the valve shaft holder 32. As shown in FIG. In addition, the guide bush 26 and the valve shaft holder 32 are both formed of a cylindrical material made of brass.

The valve shaft holder 32 has a cylindrical shape of a lower opening positioned outside the guide bush 26, and has formed a moving screw portion 31 on the inner surface as described above, and is centered on the valve shaft holder 32. The upper shaft diameter portion of the valve shaft 24 is fitted and connected by a push nut 33. The valve shaft 24 formed at the lower end of the valve body 23 is made of brass, and is compressed in the center of the valve shaft holder 32 so as to be movable up and down, and is compressed and installed in the valve shaft holder 32. (34) is always elastically supported on the lower side. On the side surface of the valve shaft holder 32, a pressure equalizing hole 32a for equalizing pressure in the valve chamber 21 and the can 40 is formed.

On the outer circumference of the push nut 33 pressed and fixed to the upper end of the valve shaft 24, a return spring 35 composed of a cylindrical compression coil spring is provided, and the fixing screw 25 of the guide bush 26 is provided. And screwing with the moving screw part 31 of the valve shaft holder 32, the return spring 35 returns the screwing of the fixed screw part 25 and the moving screw part 31 which abuts on the inner surface of the can 40. As shown in FIG. Resilient to make. The return spring 35 may be installed in a state in which the return spring 35 is gently fitted to the outer circumference of the push nut 33 or may be provided so as to be elastically connected to the outer circumference of the push nut.

The valve body 20 is made of metal such as brass, and joining with the can 40 is performed by welding the end of the can to the stepped portion of the colored plate 41 fixed to the can by welding or the like. In addition to butt welding, the end portion of the can 40 may be bent flat to the outer circumference to form a collar portion, and the collar portion and the collar plate 41 may be fixed by welding.

The valve shaft holder 32 and the rotor 30 are coupled with the support ring 36 interposed therebetween, and the support ring 36 is a metal ring made of brass inserted in the molding of the rotor 30 in this embodiment. It consists of. The upper protrusion of the valve shaft holder 32 fits into the inner circumferential hole of the support ring 36, and the rotor 30, the support ring 36, and the valve shaft holder 32 are coupled by caulking the outer circumference of the upper protrusion. have. The valve body 20, the valve shaft 24, the guide bush 26, the valve shaft holder 32, and the support ring 36 are all made of brass as described above, and the configuration is considered in consideration of recycling.

A lower stopper body (fixed stopper) 27 constituting one of the stopper mechanisms is fixed to the guide bush 26, and the lower stopper body 27 is made of a ring-shaped plastic, and a plate-shaped lower stopper piece ( 27a) is protruded. In addition, an upper stopper body (moving stopper) 37 constituting the other of the stopper mechanism is fixed to the valve shaft holder 32, and the upper stopper body 37 is also made of a ring-shaped plastic, and has a plate shape toward the lower side. A stopper piece 37a is protruded to engage with the lower stopper piece 27a.

The lower stopper body 27 is fixed to the spiral groove portion 26a formed on the outer circumference of the guide bush 26 by injection molding, and the upper stopper body 37 is formed on the spiral groove formed on the outer circumference of the valve shaft holder 32. 32b) is fixed by injection molding. In addition, the fixing of the lower stopper body 7 and the upper stopper body 37 is not limited to injection molding, and may be fixed by adhesion or pressing.

A plurality of lead terminals 54 connected to the stator coils 53 and 53 protrude from the stator 50, and a connector 56 to which various lead wires 55 are connected to the lead terminals is connected. In addition, a cover 57 covering the connector 56 is welded to the stator 50, and the cover 57 is filled with a filler 58 such as silicone resin.

The cover 57 is made of plastic, and is formed of surface portions 57a, both side portions 57b and 57c and flat portions 57d, as shown in FIG. 5, to secure an internal space covering the connector 56. It is. Moreover, the edge part 57e is formed in the joining surface of the surface part and both side parts joined to the stator 50, and the flat part 57f is formed in the opposite surface of the edge part.

The stator 50 has a fitting hole 50a of the lower surface opening at the center, and the can 40 is fitted into the fitting hole, and the valve body 20 is formed by a stop member 59 welded to the lower surface of the stator 50. ) And can 40. In this embodiment, the stop member 59 is composed of a metal plate having elasticity such as stainless steel, and has a horizontal base 60 in which the installation hole 60a is formed, and two arm portions 61 extending downward from the base. And 61, at the same time, a positioning portion 62 extending above the base 60 is formed.

The two arm portions 61 and 61 have parallel portions extending from the base 60 and curved portions continuous below them, and the curved portions are formed with a radius of curvature equal to the tube diameter of the horizontal fluid inlet and outlet pipe 20b. . The positioning portion 62 is bent upward in a semicircular shape, and is engaged with the respective portions of the stator 50 to prevent the stop member 59 from turning relative to the protruding portion 50b. The stop member 59 is fixed by inserting the projection 50b of the stator 50 into the installation hole 60a and crushing it by an ultrasonic welder or the like.

According to the electric valve of this embodiment comprised as mentioned above, the stator 50 engages the can 40 to the fitting hole, and pushes it in the valve main body 20 direction, and the two arm parts of the stop member 59 are carried out. 61 and 61 hold the fluid outflow pipe 20b in the horizontal direction, and the stator 50 is very easily and reliably fixed to the valve body 20 and the can 40. Since the stop member 59 is small in size and simple in shape, it is easy to manufacture and thus the cost can be reduced, and the stop member 59 can be easily fixed to the stator 50.

Another embodiment of the stop member will be described with reference to FIG. 3. 3 is a perspective view of another embodiment of a stop member. In the stopper member 65 of this embodiment, the base 66 in the horizontal direction is almost ring-shaped, and four mounting holes 66a are laid in the ring-shaped base 66. In addition, since the two arm portions 67 and 67 extending from the base 66 are composed of parallel portions and bent portions as in the above embodiment, and the base 66 is fixed to the stator by four installation holes 66a, The stop positioning portion is not formed.

Next, another fixing structure of the stop member will be described with reference to FIG. 4. Fig. 4A is a sectional view of the main part before and after fixing showing the first fixing structure, Fig. 4B is a sectional view of the main part before and after fixing showing the second fixing structure, and Fig. 4C is a sectional view of the main portion before and after fixing showing the third fixing structure. . In Fig. 4A, the projection 50b of the stator is inserted into the installation hole 60a of the stop member 59, and the protrusion of the projection is crushed by, for example, an ultrasonic welder, to stop the stop member 59 on the stator 50. It is fixed to).

In Fig. 4B, a hole 50c is formed in the stator 50 corresponding to the installation hole 60a of the stop member 59, and an uneven portion 70a is formed on the outer circumference by a roller processing or the like, and the collar The fixing member 70 having the portion 70b is pushed in and fixed. The outer diameter of the fixing member 70 is set slightly larger than the inner diameter of the hole 50c, and is pushed into the hole 50c of the stator with ultrasonic waves applied, so that the uneven portion 70a of the outer circumference is pushed into the resin of the stator. It is fixed in a state. In addition, in the fixed structure shown to FIG. 4A and FIG. 4B, it is preferable that resin which molds a stator is a thermoplastic resin.

In Fig. 4C, a mounting hole 50d is formed in the stator 50, and a female screw is formed in the hole. The stop member 59 can be fixed to the stator 50 by inserting the fixing screw 71 into the stator hole 50d and screwing it to the female screw. In addition, the fixing screw 71 may be screwed directly into the hole which does not form a female thread, using a self-tapping screw. According to each fixing structure of the stop member 59 shown in FIG. 4, the stop member 59 can be fixed to the stator 50 very easily and reliably.

The stator 50 is provided with a lead terminal 54, and a flat portion 57f is formed in the cover 57 covering the connector 56 connected to the lead terminal 54. When welding the cover 57 to the stator 50, the edge part 57e of a joining surface is abutted against the stator 50, and the horn part of an ultrasonic welder is pressed against the flat part 57f, and is pressed in the stator direction.

As a result, the stator portion facing the edge portion 57e is melted so that the edge portion 57e is dissolved in the stator 50, and the cover 57 is reliably welded to the stator 50. In addition, since the horn portion of the ultrasonic welder can press the flat portion 57f along the joining surface continuous to the upper surface portion and both side surface portions, welding can be easily and surely performed. Thereafter, the space between the cover 57 and the stator 50 may be filled with a filler 58 such as a silicone resin, and the connecting portion between the connector 56 and the lead terminal 54 may be sealed. Moreover, as shown to FIG. 5C, the cover 57 is provided with convex parts 57g and 57h, and acts as a stopper for the prevention of the omission of the lead terminal 54. As shown in FIG.

FIG. 6 is a perspective view illustrating still another embodiment of the stop member 70 ', and in FIG. 1, the stop member 70' is formed of a metal plate having elasticity such as stainless steel and extends in the horizontal direction. It is formed continuously via the base 73 and the 1st base 73 and the connection part 74, and has the 2nd base 75 parallel to the 1st base 73 in the horizontal direction. The 1st base 73, the connection part 74, and the 2nd base 75 comprise the base of the stopper 70 '. Two elastic arm parts 72a and 72b extend downward from the first base 73. In addition, two protruding portions 75c extending from the second base 75 are longer than the first base 73 and integrally extend in the left and right horizontal directions. The extended portion 75c constitutes the locking arm of the stop member 70 '.

Further, the second base 75 has an arc shape (curved portion) along the inner circumference of the fitting hole 50a at the center of the can-side edge portion 75b, which is the edge portion opposite to the edge portion 75a near the connecting portion 74. It is formed with 72e.

In addition, the two arm portions 72a and 72b extend from the first base 73 to the inwardly inclined portion 72c and the inclined portion 72d, and the bent portion 72f and the inclination toward the outside. It has the part 72g and the inclination part 72h, and the curved part 72f is formed with the radius of curvature equivalent to the pipe diameter of the fluid inlet / out tube 20b of a horizontal direction. Moreover, the installation hole 76 is made from the 1st base 73 to the connection part 74, and the installation hole 75d is provided in the extended part 75c of the 2nd base 75. As shown in FIG.

According to the stop member 70 'configured as described above, the stator 50 fits the can 40 into the fitting hole 50a and pushes the can 40 in the direction of the valve main body 20, thereby preventing both of the stop members 70'. Each of the curved portions 72e and 72e of the two arm portions 72a and 72b holds the fluid inlet and outflow pipe 20b in the horizontal direction, and the stator 50 is easily and reliably fixed to the valve body 20.

 In addition, when the stator 50 is fixed to the valve body 20, as shown in FIG. 7, the stop member 70 ′ has fitting holes at the bottom surface of the stator 50 with the mounting holes 75 d and 76. It inserts into three of the some processus | protrusion 80 formed in predetermined space around 50a), and is fixed by crushing the protrusion part of the processus | protrusion 80, for example by an ultrasonic welder. 7 is a longitudinal cross-sectional view which abbreviate | omits the can 40, its internal structure, and a valve main body.

FIG. 8 is a view showing a state in which the stop member 70 'is fixed to the lower portion of the stator 50, and FIG. 7 is viewed from the arrow direction. In Fig. 3, a stop member is provided on three projections 80 of the projections 80 integrally formed with the plurality of (two in Fig.) Stators 50 at predetermined intervals around the fitting hole 50a of the stator 50. The installation holes 75d and 76 of 71 are inserted along the circumference of the circumference of the fitting hole 50a with the circular arc portion 75e of the stop member 70 '. In addition, 80 'of the figure shows the state which was inserted in the installation hole 76 and the installation hole 75d, and crushed by the ultrasonic welder.

According to this embodiment, since the projection into which the installation hole is inserted can be changed by making a plurality of projections around the fitting hole of the lower surface of the stator 50 at predetermined intervals, the fixing position of the stop member is moved in the circumferential direction of the fitting hole. Since the effect which can be changed freely can be achieved, and the stop member can be fixed in multiple places, the fixing strength can be increased.

As can be understood from the above description, the electric valve of the present invention can easily install a stator in the valve body and the can. In addition, the configuration can be simplified to achieve cost savings. The stop member for holding the stator in the fluid inlet and outflow pipe of the valve body can be easily and securely fixed to the stator. The cover covering the stator lead terminals and the connector can be welded easily and reliably.

Moreover, the electric valve of this invention can change the fixing position of a stop member, and can increase the fixing strength.

Claims (3)

A valve body having fluid inlet and outlet pipes on the side and bottom and adjusting the flow rate of the fluid by a valve body contacting and separating the valve seat in the valve chamber, and actuating the valve body to contact and separate the valve seat. An electric valve comprising: a stator for rotating the rotor; a stator for rotating the rotor; and a stop member fixed to a lower surface of the stator. The stop member is formed of a flat plate spring, a base positioned in the horizontal direction, two locking arms extending integrally from the base in a horizontal direction, and integrally bent from the base to be stretched downward and in a horizontal direction. It has two elastic arm parts which can be attached to the said fluid inlet / outlet pipe, The base valve and the two locking arms are provided with mounting holes for fitting to the projections protruding from the lower surface portion of the stator. The method of claim 1, And the stop member is fixed to the stator by inserting the protrusion into the installation hole and pressing the protrusion. The method of claim 1, The can side edge portion of the base is concave in an arc shape along the inner circumference of the fitting hole.

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