CN109944975B - Stator for electric valve and electric valve - Google Patents
Stator for electric valve and electric valve Download PDFInfo
- Publication number
- CN109944975B CN109944975B CN201811473697.9A CN201811473697A CN109944975B CN 109944975 B CN109944975 B CN 109944975B CN 201811473697 A CN201811473697 A CN 201811473697A CN 109944975 B CN109944975 B CN 109944975B
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- valve
- bracket plate
- main body
- electric valve
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- 238000003825 pressing Methods 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims description 26
- 238000003780 insertion Methods 0.000 claims description 21
- 230000037431 insertion Effects 0.000 claims description 20
- 210000000078 claw Anatomy 0.000 claims description 8
- 230000002265 prevention Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims 2
- 238000005452 bending Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 241000219122 Cucurbita Species 0.000 description 1
- 235000009852 Cucurbita pepo Nutrition 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The invention provides a stator for an electric valve and an electric valve. A stator body (1) is attached to a valve body (3) having a housing (31) that houses a magnetic rotor (32) with a simple structure. A fixed member (2) is configured by a bracket plate (21) which is in contact with the bottom (1B) of a stator main body (1) and a pair of side frames (22) which are arranged on the side of the stator main body (1). A check engagement piece (21b) is provided around an opening (21A1) of an annular base (21A) of a bracket plate (21). The side frame (22) is composed of a frame body (22A), a flange part (22B), and an engagement part (22C). The engaging part (22C) is engaged with the top surface part (1U) of the stator main body (1), and the bracket plate (21) is clamped and held by the engaging part (22C) and the flange part (22B). The top of the housing (31) of the valve body (3) is pressed by a pressing part (22f) of the engaging part (22C). The bottom surface of the valve main body (3) is held by the non-return engagement piece (21 b).
Description
Technical Field
The present invention relates to a stator for an electric valve used in a refrigeration cycle system or the like, and an electric valve provided with the stator for an electric valve.
Background
Conventionally, as such an electrically operated valve, there is an electrically operated valve in which a valve body is operated by rotation of a magnetic rotor of a motor unit such as a stepping motor. In such an electrically operated valve, it is necessary to seal the fluid flow path, and the magnetic rotor of the motor unit is housed in a cylindrical housing that constitutes a sealed structure together with the valve body. The stator of the motor unit is disposed on the outer periphery of the housing. For example, the same electrically operated valves as those disclosed in japanese patent laid-open nos. 2006-.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2006-20480
Patent document 2: japanese patent laid-open publication No. 2004-332818
Disclosure of Invention
Problems to be solved by the invention
In the motor-operated valve of patent document 1, a bracket for fixing the stator is provided above the stator, and the bracket and the housing are configured to extend upward from the stator. Therefore, there is still room for improvement in terms of space saving.
In contrast, in the motor-operated valve of patent document 2, an annular bracket plate for attaching the stator is used for a housing assembled to the valve main body, and the bracket plate is attached to the bottom surface of the housing of the stator. However, in the motor-driven valve of patent document 2, in order to attach the bracket plate, it is necessary to form a pair of insertion/removal guide portions, a stopper portion engagement portion, and the like on the bottom surface of the housing of the stator, and it is necessary to process the stator main body.
The invention provides a stator for an electric valve, which can fix the stator main body to a valve main body with a simple structure in an electric valve with the stator mounted on the valve main body of a shell for accommodating a magnetic rotor.
Means for solving the problems
The stator for an electric valve according to claim 1 includes: a stator body configured to form the motor unit together with a magnetic rotor on a valve body side by fitting the valve body, which is driven by the motor unit, into the insertion hole; and a fixing member that fixes the stator body and the valve body, wherein the fixing member includes: an annular bracket plate disposed at a bottom of the stator body and having an opening through which the valve body is inserted; and at least one pair of side frames, one end of which is connected with the periphery of the bracket plate, and the other end of which is engaged with the top surface part of the stator main body.
The stator for an electric valve according to claim 2 is the stator for an electric valve according to claim 1, wherein the side frame has a flange portion bent toward an axial line side at an end portion on the bracket plate side, the flange portion abuts against a surface of the bracket plate opposite to a surface thereof contacting the stator main body, and the bracket plate and the stator main body are sandwiched by the flange portion and a portion engaging with a top surface portion of the stator main body, whereby the fixing member is attached to the stator main body.
The stator for an electric valve according to claim 3 is the stator for an electric valve according to claim 2, wherein the flange portion and the bracket plate are configured to prevent a deviation in a direction intersecting the axis and a deviation in a rotational direction about the axis of the flange portion and the bracket plate by engaging one of the convex portions with the other of the concave portions.
The stator for an electric valve according to claim 4 is the stator for an electric valve according to claim 3, wherein the bracket plate includes a non-return engaging claw that is non-return engaged with an outer peripheral end portion of the valve main body in the opening portion in an axial direction of the insertion hole, and the side frame includes a pressing portion that presses a top portion of the valve main body at the other end of the stator main body on the top surface side.
The stator for an electric valve according to claim 5 is the stator for an electric valve according to claim 3, wherein the bracket plate includes: a non-return engaging piece including a non-return engaging claw that is non-return engaged with an outer peripheral end portion of the valve main body in the opening portion in an axial direction of the insertion hole; and a plurality of shake prevention pieces elastically abutting against an outer peripheral end portion of the valve main body.
The stator for an electric valve according to claim 6 is the stator for an electric valve according to claim 3, wherein the bracket plate includes: a non-return engaging piece including a non-return engaging recessed portion projecting inward, the non-return engaging recessed portion non-return engaging with an outer peripheral end portion of the valve main body in the opening portion in an axial direction of the insertion hole; and a plurality of shake prevention pieces elastically abutting against an outer peripheral end portion of the valve main body.
The stator for an electric valve according to claim 7 is the stator for an electric valve according to any one of claims 1 to 4, wherein a holding piece that elastically abuts against an outer peripheral surface of the stator main body is provided on an outer periphery of the bracket plate.
The electrically operated valve according to claim 8 is characterized in that the stator for an electrically operated valve according to any one of claims 1 to 7 is provided in the valve main body.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the stator for an electric valve of claims 1 to 7, since the bracket plate is fixed to the stator main body by the side frame in a state where the bracket plate is in contact with the bottom portion of the stator main body, the stator main body can be attached to the valve main body by a simple structure including the bracket plate and the side frame. In addition, in a state where the valve main body is fitted into the insertion hole of the stator main body and inserted into the opening portion of the bracket plate to mount the stator main body to the valve main body, the check engagement claw of the bracket plate is check-engaged with the outer peripheral end portion of the valve main body in the axial direction, and the top portion of the valve main body is pressed by the end portion of the side frame, or the outer peripheral end portion of the valve main body is elastically abutted against the shake prevention piece of the bracket, whereby the stator for the electric valve can be reliably fixed to the valve main body. Further, the housing of the valve main body and the like do not protrude upward from the stator main body, and space can be saved.
According to the motor-operated valve of claim 8, the same effects as those of claims 1 to 7 can be obtained.
Drawings
Fig. 1 is a longitudinal sectional view of a stator for an electric valve according to a first embodiment of the present invention.
Fig. 2 is an external side view of the stator for the electric valve according to the first embodiment.
Fig. 3 is a partially sectional side view of the electrically operated valve of the first embodiment.
Fig. 4 is an exploded perspective view of a fixing member of the stator for the electric valve according to the first embodiment.
Fig. 5 is a perspective view and a partially sectional perspective view of the stator for an electric valve and the valve main body according to the first embodiment before mounting.
Fig. 6 is an external perspective view of the fixing member in an assembled state of the stator for the electric valve according to the first embodiment.
Fig. 7 is an external perspective view of a stator main body of the stator for an electric valve according to the first embodiment.
Fig. 8(a) to (C) are bottom views of the stator body and the valve body of the first and second embodiments when assembled.
Fig. 9 is a longitudinal sectional view of a stator for an electric valve according to a second embodiment of the present invention.
Fig. 10 is an external side view of a stator for an electric valve according to a second embodiment.
Fig. 11 is a partially sectional side view of the electrically operated valve of the second embodiment.
Fig. 12 is an exploded perspective view of a fixing member of a stator for an electric valve according to a second embodiment.
Fig. 13 is a diagram showing a modification of the second embodiment.
In the figure:
1-stator body, 1H-insertion hole, 11-bobbin, 12-coil, 13-yoke, 20-stepping motor (motor part), 2-fixing member, 21-bracket plate, 21A-annular base, 21A 1-opening, 22-side frame, 22A-frame body, 22B-flange, 22C-engaging part, L-axis, 3-valve body, 31-housing, 32-magnet rotor, 33-cover member, 2 '-fixing member, 21' -bracket plate, 21A '-annular base, 21B' -rectangular base, 21A1 '-opening, 21A' -two fork-shaped guide piece, 21B '-non-return engaging piece, 21B 1' -claw, 21B2 '-recess, 21C' -protrusion, 21d '-protrusion, 22' -frame, 22A '-frame body, 22B' -protrusion, 22C '-engaging part, 22 e' -engaging hole, 22 g' -terminal plate.
Detailed Description
Hereinafter, embodiments of the stator for an electric valve and the electric valve according to the present invention will be described with reference to the drawings. Fig. 1 is a longitudinal sectional view of an electric valve stator according to a first embodiment of the present invention, fig. 2 is an external side view of the electric valve stator according to the first embodiment, fig. 3 is a partial sectional side view of an electric valve according to the first embodiment, fig. 4 is an exploded perspective view of a fixing member of the electric valve stator according to the first embodiment, fig. 5 is an external perspective view and a partial sectional perspective view before the electric valve stator and a valve body according to the first embodiment are mounted, fig. 6 is an external perspective view of the fixing member in an assembled state of the electric valve stator according to the first embodiment, and fig. 7 is an external perspective view of the stator body of the electric valve stator according to the first embodiment. Fig. 1 is a sectional view a-a of fig. 2 and 3. Note that the concept of "up and down" in the following description corresponds to the up and down in the drawings of fig. 1 to 3.
As shown in fig. 3, the motor-operated valve of the first embodiment includes a stator body 1, a fixing member 2, a valve body 3, and a stepping motor 40 as a "motor unit". The stepping motor 40 includes a stator body 1 described later attached to the outer periphery of the housing 31 of the valve body 3, and a magnetic rotor 32 rotatably disposed inside the housing 31. Further, a predetermined gap is provided between the outer peripheral surface of the magnetic rotor 32 and the inner peripheral surface of the housing 31.
First, the valve main body 3 will be explained. As shown in fig. 5, the valve body 3 is a three-way selector valve, and is an outer case composed of a deep-drawn bottomed cylindrical case 31 and a disc-shaped lid member 33. The lid member 33 is a member obtained by press forming and punching a stainless steel plate material, and has an upper surface portion fitted into the open end of the housing 31 and hermetically joined thereto by welding or the like, and a flange portion 33b on a lower surface portion. This partitions the housing 31 into a valve chamber and a rotor chamber having a sealed structure. The joint pipes 34, 35, and 36 are fixed to the cover member 33 by brazing or the like through a port not shown. By rotation of the magnetic rotor 32 (see fig. 3) in the rotor chamber, a valve body (not shown) in the valve chamber rotates, and the flow paths through the joints 34, 35, and 36 are switched. A protrusion 33c is integrally formed at one portion of the outer periphery of the cover member 33 by punching and press forming. The protrusion 33c has a gourd shape, and has a constricted portion 33d on the base side to engage with the bifurcated guide piece 21a of the fixing member 2 described later.
As shown in fig. 1 and 3, the stator body 1 is configured by winding coils 12, 12 around a resin bobbin 11, and stacking a pair of coil portions in the direction of the axis L. Further, on the bobbin 11, a yoke (yoke) 13 having magnetic pole teeth 13a is integrally assembled by molding. The stator body 1 has a cylindrical insertion hole 1H centered on the axis L at the center, and the magnetic pole teeth 13a of the yoke 13 are arranged in a part of the inner peripheral surface of the insertion hole 1H. The housing 31 of the valve body 3 is fitted into the insertion hole 1H, and the stator body 1 is fixed to the valve body 3 by the fixing member 2. The magnetic pole teeth 13a face the outer peripheral surface of the housing 31.
The stator body 1 is configured as an integrally molded product by sealing an assembly of the bobbin 11, the coil 12, and the yoke 13 with a resin 14 and covering the outside of the resin 14 with an outer case 15. The lower end of the outer case 15 is an annular bottom portion 1B, and the upper end of the outer case 15 is a top surface portion 1U. The insertion hole 1H penetrates the top surface portion 1U. As shown in fig. 7, on the top surface 1U of the stator body 1, notches 15a and 15a recessed outward from the insertion hole 1H are formed at positions separated by 180 ° about the axis L, and grooves 15b and 15b are formed to communicate further outward from the notches 15a and 15 a. As shown in the sectional perspective views of fig. 1 and 5, the yoke 13 has projections 13b at the positions of the grooves 15b and 15b, and the projections 13b are exposed in the grooves 15b and the notches 15 a.
The fixing member 2 is attached to the bottom portion 1B (lower end portion of the resin case 15) and the side and top surface portions 1U of the stator body 1. As shown in fig. 4, the fixed member 2 is composed of a bracket plate 21 and a pair of side frames 22, 22.
The carrier plate 21 is a press-formed product, and includes an annular base portion 21A having a substantially circular outer peripheral shape, and a rectangular base portion 21B integrally connected to one end portion of the annular base portion 21A and bent. The annular base portion 21A has an opening portion 21A1 into which the cap member 33 of the valve main body 3 is fitted, and the annular base portion 21A is integrally formed with a bifurcated guide piece 21A and a non-return engagement piece 21b bent downward from the annular base portion 21A in the opening portion 21A 1. Further, three clamping pieces 21c formed by bending upward are formed integrally with the annular base portion 21A at the outer peripheral edge, at the center of the base portion 21B, and on the opposite side of the base portion 21B. In the annular base portion 21A, fitting holes 21d as recessed portions are formed at four locations around the opening portion 21A 1. Further, recesses 21e are formed in two locations 180 degrees opposite to each other on the outer periphery of the annular base 21A.
The side frame 22 is a press-formed product, and integrally includes: a frame main body 22A disposed substantially parallel to the axis L and having a long dimension substantially equal to the height of the stator main body 1; an arc-shaped oblong flange portion 22B bent toward the axis L at the lower end portion of the frame main body 22A; and an engaging portion 22C bent toward the axis L at the upper end of the frame body 22A. The flange portion 22B is formed with a pair of protrusions 22e and 22e that engage with the pair of fitting holes 21d and 21d on one side of the annular base portion 21A. The engaging portion 22C is formed with a pair of pressing portions 22f, 22f by bending a part thereof, and is formed with a terminal piece 22g by bending the inner sides of the pressing portions 22f, 22f toward the frame main body 22A.
According to the above configuration, the fixing member 2 is attached to the stator body 1 as follows. The three clamping pieces 21c of the bracket plate 21 are engaged with the lower part of the side surface of the stator body 1, and the annular base 21A of the bracket plate 21 is brought into contact with the bottom part 1B. Then, the pressing portions 22f, 22f of the engaging portion 22C at the upper end of the side frame 22 are engaged with the notch portion 15a of the top surface portion 1U of the stator body 1. At this time, the terminal piece 22g of the engaging portion 22C is inserted into the groove portion 15b, and the tip of the terminal piece 22g is brought into contact with the projection 13b of the yoke 13. In this state, the frame main body 22A of the side frame 22 is fitted into the recessed portion 21e on the outer periphery of the annular base portion 21A of the carrier plate 21, and the flange portion 22B of the side frame 22 is fitted into the back surface of the annular base portion 21A of the carrier plate 21, so that the pair of protruding portions 22e, 22e are engaged with the pair of fitting holes 21d, 21d of the annular base portion 21A. As a result, as shown in fig. 5 and 6, the fixing member 2 is assembled to the outer peripheral portion of the stator body 1, and the stator for an electric valve of the first embodiment is configured.
By performing the fixing as described above, it is possible to prevent the fixing member 2 and the stator body 1 from being displaced in a direction intersecting the axis L and in a rotational direction about the axis L.
Next, the stator for the electric valve of the first embodiment is attached to the valve main body 3. As shown by the arrows in fig. 5, the housing 31 of the valve main body 3 is inserted from the bracket plate 21 side of the fixed member 2 into the insertion hole 1H of the stator main body 1 through the opening 21a1 of the bracket plate 21.
Here, fig. 8(a) to (C) are bottom views at the time of assembly of the stator body 1 and the valve body 3 in the embodiment. The fixed member 2 is not shown. Fig. 8(a) is a bottom view of the valve main body 3, and as described above, the protrusion 33c and the constricted portion 33d are formed at one location on the outer periphery of the cap member 33 of the valve main body 3. Fig. 8(B) is a bottom view of the stator body 1, and a notch 11a is formed at one position on the inner periphery of the bottom of the bobbin 11 of the stator body 1. Fig. 8(C) is a bottom view of the stator body 1 assembled to the valve body 3, and the protrusion 33C of the valve body 3 is fitted into the notch 11a of the stator body 1. Thereby, the position of the stator body 1 about the axis L with respect to the valve body 3 is defined. In addition, when the projection 33c is fitted into the notch 11a, the fixing member 2 is actually attached, and the contraction portion 33d engages with the bifurcated guide piece 21a of the fixing member 2, whereby the projection 33c is guided in the direction of the axis L and fitted into the notch 11 a. In fig. 1, the two-fork guide piece 21a is positioned in front of the paper surface in a sectional view taken along line a-a of fig. 2, and is therefore indicated by a two-dot chain line as an imaginary line.
As described above, when the stator for an electric valve (the stator main body 1 in which the fixing member 2 is assembled) of the first embodiment is attached to the valve main body 3, the check engagement piece 21b of the fixing member 2 abuts on the outer periphery of the cover member 33 of the valve main body 3. When the valve body 3 is inserted into the insertion hole 1H in the direction of the axis L, the check engaging piece 21b is deflected outward, and when the cover member 33 passes over the end of the check engaging piece 21b, the check engaging piece 21b is returned to the axis L side by its elastic force, and the end of the check engaging piece 21b engages with the outer peripheral back surface of the cover member 33, resulting in the state shown in fig. 1 to 3. At this time, the top of the housing 31 of the valve body 3 abuts against the pressing portion 22f at the engaging portion 22C of the side frame 22 of the fixed member 2, and the pressing portion 22f presses the top of the housing 31 by its elastic force. Therefore, the stator for the electric valve can be reliably fixed to the valve main body.
As described above, according to the stator for an electric valve of the first embodiment, since the fixing member 2 is assembled to the stator body 1, the stator can be easily attached to the valve body 3. Further, the side frame 22 of the fixing member 2 can be reliably and firmly fixed to the valve body 3 by the elastic force.
As shown in fig. 3 and 5, in the engaging portion 22C of the side frame 22 of the fixing member 2, the terminal piece 22g abuts against the projection 13b of the yoke 13 in the groove portion 15b and the notch portion 15a of the outer case 15, and therefore the yoke 13 and the fixing member 2 are electrically grounded. The annular base portion 21A of the fixed member 2 and the cap member 33 of the valve main body 3 are electrically grounded. This can prevent generation of electric high-frequency noise between the yoke 13 and the housing 31.
Fig. 9 is a longitudinal sectional view of an electric valve stator according to a second embodiment of the present invention, fig. 10 is an external side view of the electric valve stator according to the second embodiment, fig. 11 is a partial sectional side view of an electric valve according to the second embodiment, and fig. 12 is an exploded perspective view of a fixing member in the electric valve stator according to the second embodiment. Fig. 9 is a sectional view a-a of fig. 10 and 11.
In this second embodiment, the difference from the first embodiment is in the following respects: in the second embodiment, the valve body 3 is mounted to the stator body 1 at a position slightly below the position in the direction of the axis L in comparison with the first embodiment. In addition, the following are different: the structure of a part of the fixing member 2' in the second embodiment is different from that of the fixing member 2 in the first embodiment. The other structure is the same as that of the first embodiment.
As shown in fig. 12, the fixing member 2 'in the second embodiment is composed of a carriage plate 21' and a pair of side frames 22 ', 22'. The carrier plate 21 'is a press-formed product, and includes an annular base portion 21A' having a substantially circular outer peripheral shape and a rectangular base portion 21B 'integrally connected to one end portion of the annular base portion 21A' and bent. The annular base portion 21A ' has an opening portion 21A1 ' into which the cap member 33 of the valve main body 3 is fitted, and two fork-shaped guide pieces 21A ' and check engagement pieces 21b ' bent downward from the annular base portion 21A ' are integrally formed in the annular base portion 21A ' and the opening portion 21A1 '. In addition, in the annular base portion 21A ', at two locations in the opening portion 21A 1', there are integrally formed protrusion portions 21c 'bent from the annular base portion 21A'. In addition, the annular base portion 21A ' has four projections 21d ' formed around the opening 21A1 '. The convex portion 21d 'is cut out by press working to the lower side of the annular base portion 21A'. A pawl 21b1 ' protruding toward the opening 21a1 ' is cut out from the check engaging piece 21b '.
The side frame 22' is a press-formed article integrally having: a frame main body 22A' arranged substantially parallel to the axis L and having a long dimension substantially the same as the height of the stator main body 1; an arc-shaped oblong flange portion 22B 'bent toward the axis L at the lower end of the frame main body 22A'; and an engaging portion 22C 'bent toward the axis L at the upper end of the frame body 22A'. The flange portion 22B 'is formed with a pair of fitting holes 22 e', 22e 'that engage with the pair of projections 21 d', 21d 'on one side of the annular base portion 21A'. In the engaging portion 22C ', a terminal piece 22g ' is formed by bending a part thereof toward the frame main body 22A '.
According to the above configuration, the fixing member 2' is attached to the stator body 1 as follows. As shown in fig. 9, the stator body 1 has a diameter-enlarged hole 1H1 formed by enlarging the inner peripheral end of the insertion hole 1H, and the three projections 21c 'of the bracket plate 21' are engaged with and fitted into the diameter-enlarged hole 1H1, and the annular base 21A 'of the bracket plate 21' is brought into contact with the bottom 1B. Thereby, the annular base portion 21A' is temporarily fixed to the bottom of the stator body 1. Next, the engaging portion 22C 'at the upper end of the side frame 22' is engaged with the notch 15a of the top surface portion 1U of the stator body 1. At this time, the terminal piece 22g ' of the engagement portion 22C ' is inserted into the groove portion 15b, and the tip of the terminal piece 22g ' is brought into contact with the upper surface of the yoke 13. In this state, the flange portion 22B 'of the side frame 22' is fitted into the back surface of the annular base portion 21A 'of the carrier plate 21', and the pair of protruding portions 21d ', 21 d' of the annular base portion 21A are engaged with the pair of fitting holes 22e ', 22 e'. Thus, the fixing member 2' is assembled to the outer peripheral portion of the stator main body 1, and the stator for an electric valve of embodiment 2 is configured.
By fixing as described above, it is possible to prevent the fixing member 2' and the stator body 1 from being displaced in a direction intersecting the axis L and in a rotational direction about the axis L.
Next, the stator for an electric valve according to the second embodiment is assembled to the valve main body 3. The housing 31 of the valve main body 3 is inserted into the insertion hole 1H of the stator main body 1 from the side of the bracket plate 21 'of the fixed member 2' through the opening portion 21a1 'of the bracket plate 21'. In this case, as in the first embodiment, the protrusion 33c of the valve body 3 is fitted into the notch 11a of the stator body 1, and defines the position of the stator body 1 about the axis L with respect to the valve body 3. Further, the constricted portion 33d of the projecting portion 33c engages with the bifurcated guide piece 21a 'of the fixing member 2', whereby the projecting portion 33c is guided in the direction of the axis L and fitted into the cutout portion 11 a.
As described above, when the stator for an electric valve (the stator main body 1 to which the fixing member 2 'is assembled) of the second embodiment is attached to the valve main body 3, the claws 21b 1' of the check engaging pieces 21b 'of the fixing member 2' abut against the outer periphery of the cover member 33 of the valve main body 3. When the valve body 3 is inserted into the insertion hole 1H in the direction of the axis L, the check engaging piece 21b ' and the pawl 21b1 ' are deflected outward, and when the cap member 33 passes over the end of the pawl 21b1 ', the check engaging piece 21b ' is returned to the axis L side by its elastic force, and the end of the pawl 21b ' engages with the outer peripheral back surface of the cap member 33, so that the state shown in fig. 9 to 11 is achieved. At this time, as shown in the enlarged view of fig. 9, the protrusion 21c ' of the fixing member 2 ' serves to temporarily fix the annular base portion 21A ' to the bottom portion of the stator body 1, but the cap member 33 of the housing 31 of the valve body 3 abuts on the protrusion 21c ' to restrict upward movement of the valve body 3 with respect to the fixing member 2 ' (the stator body 1). Therefore, the stator for the electric valve can be reliably fixed to the valve main body.
As described above, according to the stator for an electric valve of the second embodiment, since the fixing member 2' is assembled to the stator body 1, the stator can be easily attached to the valve body 3. In addition, the side frame 22 'of the fixing member 2' can be reliably and firmly fixed to the valve body 3 by the elastic force.
As shown in fig. 9, in the engaging portion 22C ' of the side frame 22 ' of the fixing member 2 ', the terminal piece 22g ' abuts on the upper surface of the yoke 13 in the groove portion 15b and the notch portion 15a of the outer case 15, and thus the yoke 13 and the fixing member 2 ' are electrically grounded. The annular base portion 21A 'of the fixing member 2' and the cover member 33 of the valve main body 3 are electrically grounded. This can prevent generation of electric high-frequency noise between the yoke 13 and the housing 31.
Fig. 13 is a diagram showing a modification of the second embodiment. In the second embodiment, the check engaging piece 21b 'of the fixing member 2' has the claw 21b1 ', and the valve body 3 is fixed by bringing the claw 21b 1' into contact with the outer periphery of the cap member 33 of the valve body 3, but as shown in fig. 13, a recessed portion 21b2 'protruding toward the axis L side may be formed in the check engaging piece 21 b'. The valve main body 3 is fixed by bringing the recessed portion 21b 2' into contact with the outer periphery of the cap member 33 of the valve main body 3.
In the above embodiments, the bracket plate and the side frame are described as separate members, but the bracket plate and the side frame may be integrally formed.
The valve body according to each embodiment is an example of a three-way switching valve, but can be applied to an electric valve such as a flow rate control valve that controls a flow rate.
While the embodiments of the present invention have been described in detail with reference to the drawings, the specific configurations are not limited to these embodiments, and design changes and the like that do not depart from the scope of the present invention are also included in the present invention.
Claims (8)
1. A stator for an electric valve, comprising:
a stator body configured to form the motor unit together with a magnetic rotor on a valve body side by fitting the valve body, which is driven by the motor unit, into the insertion hole; and
a fixing member for fixing the stator body and the valve body,
the stator for an electric valve described above is characterized in that,
the fixing member includes:
an annular bracket plate disposed at a bottom of the stator body and having an opening through which the valve body is inserted; and
and at least one pair of side frames, one end of which is connected with the periphery of the bracket plate, and the other end of which is engaged with the top surface part of the stator main body.
2. The stator for an electric valve according to claim 1,
the side frame has a flange portion bent toward the axis of the stator body at an end portion on the bracket plate side, the flange portion abuts against a surface of the bracket plate opposite to a surface thereof contacting the stator body, and the bracket plate and the stator body are sandwiched by the flange portion and a portion engaging with a top surface portion of the stator body, whereby the fixing member is attached to the stator body.
3. The stator for an electric valve according to claim 2,
the flange portion and the bracket plate are configured to prevent a displacement of the flange portion and the bracket plate in a direction intersecting the axis and a displacement of the bracket plate in a rotational direction around the axis by engaging one of the convex portions with the other of the concave portions.
4. The stator for electric valve according to claim 3,
the bracket plate has a non-return engaging claw non-return engaged with an outer peripheral end portion of the valve body in the opening portion in an axial direction of the insertion hole, and the side frame has a pressing portion pressing a top portion of the valve body at the other end of the stator body on the top surface side.
5. The stator for electric valve according to claim 3,
the bracket plate includes:
a non-return engaging piece including a non-return engaging claw that is non-return engaged with an outer peripheral end portion of the valve main body in the opening portion in an axial direction of the insertion hole; and
and a plurality of shake prevention pieces elastically abutting against an outer peripheral end portion of the valve main body.
6. The stator for electric valve according to claim 3,
the bracket plate includes:
a non-return engaging piece including a non-return engaging recessed portion projecting inward, the non-return engaging recessed portion non-return engaging with an outer peripheral end portion of the valve main body in the opening portion in an axial direction of the insertion hole; and
and a plurality of shake prevention pieces elastically abutting against an outer peripheral end portion of the valve main body.
7. The stator for electric valve according to any one of claims 1 to 4,
the bracket plate has a holding piece at its outer periphery, which elastically contacts with the outer peripheral surface of the stator body.
8. An electric valve is characterized in that the electric valve is provided with a valve body,
a stator for an electric valve according to any one of claims 1 to 7, wherein the stator is provided in the valve main body.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017243832 | 2017-12-20 | ||
| JP2017-243832 | 2017-12-20 | ||
| JP2018-175972 | 2018-09-20 | ||
| JP2018175972A JP6883008B2 (en) | 2017-12-20 | 2018-09-20 | Electric valve stator and electric valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109944975A CN109944975A (en) | 2019-06-28 |
| CN109944975B true CN109944975B (en) | 2020-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811473697.9A Active CN109944975B (en) | 2017-12-20 | 2018-12-04 | Stator for electric valve and electric valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN109944975B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114811157A (en) * | 2022-04-06 | 2022-07-29 | 浙江中宝自控元件有限公司 | Motor fixing structure and electric valve applying same |
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| JP2004332818A (en) * | 2003-05-07 | 2004-11-25 | Saginomiya Seisakusho Inc | Electric valve |
| JP2006020480A (en) * | 2004-07-05 | 2006-01-19 | Saginomiya Seisakusho Inc | Electromagnetic actuator |
| CN1767326A (en) * | 2004-10-29 | 2006-05-03 | 日本电产三协株式会社 | Motor |
| JP2008178291A (en) * | 2001-09-03 | 2008-07-31 | Saginomiya Seisakusho Inc | Motor-operated valve |
| CN102679015A (en) * | 2012-05-25 | 2012-09-19 | 何永水 | Electric valve |
| CN203691201U (en) * | 2012-12-19 | 2014-07-02 | 美蓓亚株式会社 | Stepping motor |
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| CN104930248A (en) * | 2015-06-30 | 2015-09-23 | 贵州新安航空机械有限责任公司 | Solenoid valve coil support |
| CN106286947A (en) * | 2015-06-26 | 2017-01-04 | 株式会社鹭宫制作所 | Control valve for fluids |
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|---|---|---|---|---|
| JP2008178291A (en) * | 2001-09-03 | 2008-07-31 | Saginomiya Seisakusho Inc | Motor-operated valve |
| JP2004332818A (en) * | 2003-05-07 | 2004-11-25 | Saginomiya Seisakusho Inc | Electric valve |
| JP2006020480A (en) * | 2004-07-05 | 2006-01-19 | Saginomiya Seisakusho Inc | Electromagnetic actuator |
| CN1767326A (en) * | 2004-10-29 | 2006-05-03 | 日本电产三协株式会社 | Motor |
| CN102679015A (en) * | 2012-05-25 | 2012-09-19 | 何永水 | Electric valve |
| CN203691201U (en) * | 2012-12-19 | 2014-07-02 | 美蓓亚株式会社 | Stepping motor |
| CN104810952A (en) * | 2015-05-13 | 2015-07-29 | 广东美芝制冷设备有限公司 | Flat cable insulation framework used for distribution roll motor and distribution roll motor provided with the same |
| CN106286947A (en) * | 2015-06-26 | 2017-01-04 | 株式会社鹭宫制作所 | Control valve for fluids |
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| Publication number | Publication date |
|---|---|
| CN109944975A (en) | 2019-06-28 |
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