JP2006057738A

JP2006057738A - Electric valve

Info

Publication number: JP2006057738A
Application number: JP2004240459A
Authority: JP
Inventors: Satoshi Fujimoto; 聡藤本; Akira Mishima; 晃三島
Original assignee: Pacific Industrial Co Ltd; Taiheiyo Kogyo KK
Current assignee: Pacific Industrial Co Ltd; Taiheiyo Kogyo KK
Priority date: 2004-08-20
Filing date: 2004-08-20
Publication date: 2006-03-02

Abstract

PROBLEM TO BE SOLVED: To provide an electric valve capable of improving assembly precision of parts constituting the electric valve more than a conventional electric valve. SOLUTION: In this electric valve 10, since a brazed part of a cylindrical case 14 for an annular sheet metal member 22 and a brazed part of a valve port constituting member 21 are separated from each other, the annular sheet metal member 22 is first brazed to the valve port constituting member 21 to form one part (an end part constituting member 13) and the cylindrical case 14 can be brazed to this one part. Consequently, assembly precision of parts constituting the electric valve 10 is improved more than the conventional electric valve brazing three parts simultaneously, and engagement of a stator engaging part 35 and an overhanging engaging part 22E is stabilized. COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、モーターを駆動源とした電動弁であって、特に、そのモーターのローターを収容した円筒ケースの外側にモーターのステーターを嵌合して備えた電動弁に関する。 The present invention relates to a motor-operated valve using a motor as a drive source, and more particularly to a motor-operated valve provided with a motor stator fitted to the outside of a cylindrical case housing a motor rotor.

図２１に示した従来の電動弁は、モーター１のローター２を収容した円筒ケース３の端部開口に弁口構成部材４を嵌合すると共に、弁口構成部材４の外側に環状板金部材５を嵌合し、それら円筒ケース３と弁口構成部材４と環状板金部材５との３部品を互いに接合して一度に鑞付けした構造になっていた。また、環状板金部材５からは張出係合部６が延設されている。そして、モーター１のステーター８を円筒ケース３に嵌合して回転させると、ステーター８に備えた保持片７とステーター８の端面との間に張出係合部６が挟持される。さらに、保持片７にはエンボス７Ａが形成される一方、張出係合部６には係合孔６Ａが形成されており、これらエンボス７Ａと係合孔６Ａとが凹凸嵌合してクリック感が得られるようになっていた（例えば、特許文献１参照）。
特開平１０−１６９８２０号公報（段落［００１３］、第１図、第３図） The conventional motor-operated valve shown in FIG. 21 has a valve port constituent member 4 fitted into an end opening of a cylindrical case 3 housing the rotor 2 of the motor 1, and an annular sheet metal member 5 outside the valve port constituent member 4. The three parts of the cylindrical case 3, the valve port component 4 and the annular sheet metal member 5 are joined together and brazed at once. An overhanging engagement portion 6 extends from the annular sheet metal member 5. When the stator 8 of the motor 1 is fitted into the cylindrical case 3 and rotated, the overhanging engagement portion 6 is sandwiched between the holding piece 7 provided on the stator 8 and the end surface of the stator 8. Further, an emboss 7A is formed on the holding piece 7, while an engagement hole 6A is formed on the overhanging engagement portion 6. The emboss 7A and the engagement hole 6A are unevenly fitted to form a click feeling. (See, for example, Patent Document 1).
JP-A-10-169820 (paragraph [0013], FIGS. 1 and 3)

しかしながら、上述した従来の電動弁では、円筒ケース３と弁口構成部材４と環状板金部材５との３部品を一度に鑞付けしていたので、それら円筒ケース３と弁口構成部材４と環状板金部材５の相互の位置のばらつきが生じ易かった。このため、上記したクリック感が得られなかったり、ステーター８が円筒ケース３に対してがたつく事態が生じ得た。 However, in the conventional motor-operated valve described above, since the three parts of the cylindrical case 3, the valve port constituent member 4 and the annular sheet metal member 5 are brazed at once, the cylindrical case 3, the valve port constituent member 4 and the annular member are annular. Variations in the positions of the sheet metal members 5 were likely to occur. For this reason, the above-mentioned click feeling could not be obtained, or a situation where the stator 8 rattled against the cylindrical case 3 could occur.

本発明は、上記事情に鑑みてなされたもので、電動弁を構成する部品同士の組み付け精度を従来より向上させることが可能な電動弁の提供を目的とする。 This invention is made | formed in view of the said situation, and it aims at provision of the motor operated valve which can improve the assembly | attachment precision of the components which comprise a motor operated valve conventionally.

上記目的を達成するためになされた請求項１の発明に係る電動弁（１０，９０，９１）は、モーター（１２）を駆動源とした電動弁（１０，９０，９１）であって、モーター（１２）を構成するローター（１２Ｒ）及びステーター（１２Ｓ）のうちローター（１２Ｒ）が内側に嵌合されかつステーター（１２Ｓ）が外側に嵌合された一端有底円筒形の円筒ケース（１４）と、円筒ケース（１４）の開口端部に溶接又は鑞付けされた環状板金部材（２２，７０）と、環状板金部材（２２，７０）のうち円筒ケース（１４）との溶接又は鑞付け部分から離れた部分に溶接又は鑞付けされた弁口構成部材（２１）と、弁口構成部材（２１）に形成された流路（１１Ｃ，２３Ｂ，２５）と、流路（１１Ｃ，２３Ｂ，２５）の途中に設けられた弁口（２３Ｂ）と、ローター（１２Ｒ）に連結されかつローター（１２Ｒ）の回転に連動して弁口（２３Ｂ）を開閉する弁体（５１）と、円筒ケース（１４）又は環状板金部材（２２，７０）の何れか一方に一体形成されかつ円筒ケース（１４）又は環状板金部材（２２，７０）から側方に張り出した張出係合部（２２Ｅ，６１）と、ステーター（１２Ｓ）に設けられ、張出係合部（２２Ｅ，６１）に係合するステーター係合部（３５，６５）とを備えたところに特徴を有する。 The motor-operated valve (10, 90, 91) according to the invention of claim 1 made to achieve the above object is a motor-operated valve (10, 90, 91) using a motor (12) as a drive source, Of the rotor (12R) and stator (12S) constituting (12), a cylindrical case (14) having a bottomed cylindrical shape in which the rotor (12R) is fitted inside and the stator (12S) is fitted outside. And the annular sheet metal member (22, 70) welded or brazed to the opening end of the cylindrical case (14), and the welded or brazed portion of the annular sheet metal member (22, 70) with the cylindrical case (14) The valve port component (21) welded or brazed to a part away from the channel, the flow paths (11C, 23B, 25) formed in the valve port component (21), and the flow paths (11C, 23B, 25) ) (2) B), a valve body (51) connected to the rotor (12R) and opening and closing the valve port (23B) in conjunction with the rotation of the rotor (12R), and a cylindrical case (14) or an annular sheet metal member (22, 70). ) And a projecting engagement portion (22E, 61) projecting sideways from the cylindrical case (14) or the annular sheet metal member (22, 70), and the stator (12S). It is characterized in that it includes a stator engaging portion (35, 65) that engages with the overhang engaging portion (22E, 61).

請求項２の発明は、請求項１に記載の電動弁（９０，９１）において、張出係合部（６１）は、円筒ケース（１４）に一体形成されたところに特徴を有する。 The invention of claim 2 is characterized in that, in the motor-operated valve (90, 91) of claim 1, the overhanging engagement portion (61) is integrally formed with the cylindrical case (14).

請求項３の発明は、請求項１又は２に記載の電動弁（９０，９１）において、環状板金部材（７０）には、円筒ケース（１４）の内側又は外側に嵌合された嵌合壁（７０Ｂ）が形成されたところに特徴を有する。 The invention according to claim 3 is the electric valve (90, 91) according to claim 1 or 2, wherein the annular sheet metal member (70) is fitted on the inner side or the outer side of the cylindrical case (14). It has the feature in which (70B) was formed.

請求項４の発明は、請求項１乃至３の何れかに記載の電動弁（９１）において、ステーター（１２Ｓ）の端面（１２Ｔ）から起立しかつ直角に屈曲してステーター（１２Ｓ）の端面（１２Ｔ）との間で張出係合部（２２Ｅ，６１）を挟持した保持片（３５）をステーター係合部（３５）として備えると共に、保持片（３５）には、ステーター（１２Ｓ）の端面（１２Ｔ）に向けてエンボス（３５Ａ）が形成され、張出係合部（６１）には、エンボス（３５Ａ）が凹凸係合しかつ張出係合部（６１）の先端に開放した半円孔（６３）が形成されたところに特徴を有する。 According to a fourth aspect of the present invention, in the motor-operated valve (91) according to any one of the first to third aspects, the end surface (12S) of the stator (12S) stands up from the end surface (12T) of the stator (12S) and bends at a right angle. 12T) is provided with a holding piece (35) sandwiching the overhanging engaging portion (22E, 61) as a stator engaging portion (35), and the holding piece (35) has an end face of the stator (12S). The embossing (35A) is formed toward (12T), and the embossing part (61) has a semicircular shape in which the embossing (35A) engages with the concave and convex parts and is opened at the tip of the overhanging engaging part (61). It is characterized in that the hole (63) is formed.

請求項５の発明は、請求項１乃至３の何れかに記載の電動弁（９０）において、張出係合部（６１）は、円筒ケース（１４）又は環状板金部材（７０）を中心にした略楕円形をなし、張出係合部（６１）のうち円筒ケース（１４）又は環状板金部材（７０）からの張り出し量が最も大きくなった２位置には、張出係合部（６１）の先端に開放した半円孔（６３）が形成され、ステーター（１２Ｓ）の端面（１２Ｔ）から起立しかつ円筒ケース（１４）を挟んで対向した１対の係合アーム（６５）をステーター係合部（６５）として備え、係合アーム（６５）の先端部を円筒ケース（１４）から離れる側に湾曲させて、張出係合部（６１）の先端部を受容した係合湾曲部（６６）と、係合湾曲部（６６）の一部を円筒ケース（１４）側に突出させて半円孔（６３）に凹凸係合させたアーム突部（６７）とを設けたところに特徴を有する。 According to a fifth aspect of the present invention, in the motor-operated valve (90) according to any one of the first to third aspects, the overhanging engagement portion (61) is centered on the cylindrical case (14) or the annular sheet metal member (70). In the overhanging engagement portion (61), the overhanging engagement portion (61) is located at two positions where the overhang amount from the cylindrical case (14) or the annular sheet metal member (70) is the largest. A semicircular hole (63) that is open at the tip of the stator (12S) is formed, and a pair of engaging arms (65) that stand up from the end surface (12T) of the stator (12S) and face each other with the cylindrical case (14) interposed therebetween An engagement bending portion provided as an engagement portion (65) and bending the distal end portion of the engagement arm (65) away from the cylindrical case (14) to receive the distal end portion of the overhanging engagement portion (61) (66) and a part of the engagement bending portion (66) project toward the cylindrical case (14). Characterized in place of providing the irregularities engaged with allowed arm projection (67) in a semicircular hole (63) Te.

［請求項１の発明］
請求項１の電動弁（１０，９０，９１）では、環状板金部材（２２，７０）に対する円筒ケース（１４）との溶接又は鑞付け部分と、弁口構成部材（２１）との溶接又は鑞付け部分とが離れているので、環状板金部材（２２，７０）を、円筒ケース（１４）又は弁口構成部材（２１）の何れか一方に先に溶接又は鑞付けして１部品とし、その１部品に残りの１部品を溶接又は鑞付けすることができる。これにより、３部品を同時に鑞付けしていた従来の電動弁より、電動弁（１０，９０，９１）を構成する部品同士の組み付け精度が向上し、ステーター係合部（３５，６５）と張出係合部（２２Ｅ，６１）との係合が安定する。 [Invention of Claim 1]
In the motor-operated valve (10, 90, 91) according to claim 1, the welded or brazed portion between the cylindrical case (14) with respect to the annular sheet metal member (22, 70) and the valve port component (21). Since the attachment portion is separated, the annular sheet metal member (22, 70) is welded or brazed to either one of the cylindrical case (14) or the valve port component member (21) in advance to form one part. The remaining part can be welded or brazed to one part. As a result, the assembly accuracy of the parts constituting the motor-operated valve (10, 90, 91) is improved compared to the conventional motor-operated valve that has brazed three parts at the same time, and the stator engaging portion (35, 65) and the tensioning member are tightened. Engagement with the projecting engagement portions (22E, 61) is stabilized.

［請求項２の発明］
請求項２の電動弁（９０，９１）によれば、ステーター（１２Ｓ）が嵌合される円筒ケース（１４）に張出係合部（６１）が一体形成されているので、円筒ケース（１４）以外の部品に張出係合部（６１）が形成されている場合に比べて、ステーター（１２Ｓ）に備えたステーター係合部（６５）と張出係合部（６１）との相対位置のばらつきが抑えられ、それら張出係合部（６１）とステーター係合部（３５，６５）との係合が安定する。 [Invention of claim 2]
According to the motor-operated valve (90, 91) of the second aspect, since the overhanging engaging portion (61) is integrally formed with the cylindrical case (14) to which the stator (12S) is fitted, the cylindrical case (14 The relative position of the stator engaging portion (65) provided in the stator (12S) and the overhanging engaging portion (61) as compared to the case where the overhanging engaging portion (61) is formed in the parts other than And the engagement between the overhanging engagement portion (61) and the stator engagement portion (35, 65) is stabilized.

［請求項３の発明］
請求項３の電動弁（９０，９１）では、環状板金部材（７０）に備えた嵌合壁（７０Ｂ）と円筒ケース（１４）とを嵌合することで、環状板金部材（７０）と円筒ケース（１４）との芯出しを容易に行うことができる。 [Invention of claim 3]
In the motor-operated valve (90, 91) according to claim 3, the annular sheet metal member (70) and the cylinder are fitted by fitting the fitting wall (70B) provided in the annular sheet metal member (70) and the cylindrical case (14). Centering with the case (14) can be easily performed.

［請求項４の発明］
請求項４の電動弁（９１）では、ステーター（１２Ｓ）を円筒ケース（１４）に嵌合して回転させると、張出係合部（６１）が保持片（３５）とステーター（１２Ｓ）の端面（１２Ｔ）との間に差し込まれて挟持される。このとき、張出係合部（６１）に備えた半円孔（６３）が保持片（３５）に備えたエンボス（３５Ａ）に凹凸係合してクリック感を得ることができる。 [Invention of claim 4]
In the motor-operated valve (91) according to claim 4, when the stator (12S) is fitted to the cylindrical case (14) and rotated, the overhanging engagement portion (61) is formed between the holding piece (35) and the stator (12S). It is inserted and clamped between the end face (12T). At this time, the semicircular hole (63) provided in the overhanging engagement part (61) can be engaged with the embossing (35A) provided in the holding piece (35) to obtain a click feeling.

［請求項５の発明］
請求項５の電動弁（９０）では、ステーター（１２Ｓ）を円筒ケース（１４）に嵌合し、略楕円形の張出係合部（６１）のうち円筒ケース（１４）又は環状板金部材（７０）からの張り出し量が比較的小さい部分を、１対の係合アーム（６５，６５）の間に配置する。この状態からステーター（１２Ｓ）を円筒ケース（１４）に対して回転させると、各係合アーム（６５，６５）のアーム突部（６７）が、張出係合部（６１）の外縁部に摺接し、１対の係合アーム（６５，６５）が押し広げられる。そして、アーム突部（６７）が張出係合部（６１）の半円孔（６３）と対向したところで１対の係合アーム（６５，６５）の弾発力によってアーム突部（６７）と半円孔（６３）とが凹凸係合し、ステーター（１２Ｓ）が回り止めされる。このとき、張出係合部（６１）の先端部は、係合湾曲部（６６）に収まることで、ステーター（１２Ｓ）が円筒ケース（１４）に抜け止めされる。 [Invention of claim 5]
In the motor-operated valve (90) according to claim 5, the stator (12S) is fitted into the cylindrical case (14), and the cylindrical case (14) or the annular sheet metal member (61) of the substantially elliptical overhanging engagement portion (61). 70), a portion having a relatively small amount of overhang is disposed between the pair of engagement arms (65, 65). When the stator (12S) is rotated with respect to the cylindrical case (14) from this state, the arm protrusions (67) of the respective engagement arms (65, 65) are formed on the outer edge portion of the overhanging engagement portion (61). The pair of engaging arms (65, 65) are slid in contact and spread. When the arm protrusion (67) faces the semicircular hole (63) of the overhanging engagement portion (61), the arm protrusion (67) is generated by the elastic force of the pair of engagement arms (65, 65). And the semicircular hole (63) engage with each other to prevent the stator (12S) from rotating. At this time, the distal end portion of the overhanging engagement portion (61) is accommodated in the engagement bending portion (66), so that the stator (12S) is prevented from coming off by the cylindrical case (14).

［第１実施形態］
以下、本発明の一実施形態を図１〜図１０に基づいて説明する。本実施形態の電動弁１０は、駆動源としてステッピングモーター１２を備えている。このステッピングモーター１２は、ローター１２Ｒとステーター１２Ｓとから構成されている。ローター１２Ｒは、上端有底円筒状の永久磁石１２Ｍと、永久磁石１２Ｍの上端壁に貫通固定された回転軸部材５０とからなる。一方、ステーター１２Ｓは、環状構造のケース１２Ｃ内に複数の電磁コイル１２Ａを備えている。そして、ローター１２Ｒが、一端有底円筒形の円筒ケース１４の内側に回転可能に収容される一方、その円筒ケース１４の外側にステーター１２Ｓが嵌合されている。なお、ステーター１２Ｓの側面からは、図示しない電源に電磁コイル１２Ａを接続するためのコネクタ部１２Ｄ（図２参照）が突出している。 [First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The electric valve 10 of the present embodiment includes a stepping motor 12 as a drive source. The stepping motor 12 includes a rotor 12R and a stator 12S. The rotor 12R is composed of a cylindrical magnet 12M having an upper end and a bottom, and a rotary shaft member 50 that is fixed to the upper end wall of the permanent magnet 12M. On the other hand, the stator 12S includes a plurality of electromagnetic coils 12A in an annular structure case 12C. The rotor 12R is rotatably accommodated inside a cylindrical case 14 having a bottomed cylindrical shape, and a stator 12S is fitted to the outside of the cylindrical case 14. A connector portion 12D (see FIG. 2) for connecting the electromagnetic coil 12A to a power source (not shown) protrudes from the side surface of the stator 12S.

図１に示すように、回転軸部材５０のうち永久磁石１２Ｍへの固定部分より上側部分と円筒ケース１４との間には、ローター１２Ｒの回転量を規制するためのストッパー機構１５が備えられている。このストッパー機構１５は、以下に説明する螺旋ガイド３０とストッパーリング３１とストッパー突壁３２とからなる。 As shown in FIG. 1, a stopper mechanism 15 for regulating the amount of rotation of the rotor 12 R is provided between a portion of the rotary shaft member 50 above the portion fixed to the permanent magnet 12 M and the cylindrical case 14. Yes. The stopper mechanism 15 includes a spiral guide 30, a stopper ring 31, and a stopper protruding wall 32 described below.

螺旋ガイド３０は、回転軸部材５０の上端部に線材を螺旋状に巻回してなり、例えば、その線材の上端部を回転軸部材５０に貫通させることで、螺旋ガイド３０が回転軸部材５０に固定されている。 The spiral guide 30 is formed by winding a wire rod around the upper end portion of the rotary shaft member 50. For example, by passing the upper end portion of the wire rod through the rotary shaft member 50, the spiral guide 30 is attached to the rotary shaft member 50. It is fixed.

ストッパーリング３１は、螺旋ガイド３０のうち軸方向で隣り合った線材同士の隙間３０Ｂの一部に収まったリング状をなしかつ側方にストッパーアーム３１Ａを張り出して備えている。 The stopper ring 31 is formed in a ring shape that fits in a part of the gap 30B between the wire rods adjacent in the axial direction in the spiral guide 30, and is provided with a stopper arm 31A protruding to the side.

ストッパー突壁３２は、円筒ケース１４の内面から突出しかつ回転軸部材５０と平行に延びた形状になっている。そして、ストッパーアーム３１Ａはこのストッパー突壁３２に当接して回転が規制されている。これにより、ローター１２Ｒが回転すると、ストッパーリング３１が螺旋ガイド３０に対して相対回転して上下動し、螺旋ガイド３０の上端部又は下端部まで移動したときにローター１２Ｒが回転不能となる。以上により、ローター１２Ｒの回転量が規制されている。 The stopper protruding wall 32 has a shape protruding from the inner surface of the cylindrical case 14 and extending in parallel with the rotary shaft member 50. The stopper arm 31A is in contact with the stopper protruding wall 32 and its rotation is restricted. Accordingly, when the rotor 12R rotates, the stopper ring 31 rotates relative to the spiral guide 30 to move up and down, and when the rotor ring 12 moves to the upper end portion or the lower end portion of the spiral guide 30, the rotor 12R becomes unrotatable. Thus, the amount of rotation of the rotor 12R is regulated.

回転軸部材５０のうち永久磁石１２Ｍへの固定部分より下側には、上から順番に、大径嵌合部５０Ａと雄螺子部５０Ｂと小径嵌合部５０Ｃと弁体保持部５０Ｄと弁体抜止部５０Ｅとが並べて備えられている。大径嵌合部５０Ａと雄螺子部５０Ｂと小径嵌合部５０Ｃと弁体保持部５０Ｄとは、上から下に向かうに従って徐々に外径が小さくなっている。また、弁体抜止部５０Ｅは、下端側に向かうに従って徐々に先細りになった、所謂、円錐台形状になっており、その上面の外径は、小径嵌合部５０Ｃの外径より僅かに小さく、弁体保持部５０Ｄの外径より大きくなっている。さらに、回転軸部材５０は、小径嵌合部５０Ｃと弁体保持部５０Ｄとの境界部分を分割面とした別部品（図３参照）を抵抗溶接してなる。そして、これら別部品の抵抗溶接を行う前に、弁体保持部５０Ｄに円筒形樹脂製の弁体５１と圧縮コイルバネ５２とが嵌合され、別部品が抵抗溶接されて、圧縮コイルバネ５２の弾発力により弁体５１が弁体抜止部５０Ｅに押し付けられた状態になっている。 On the lower side of the rotating shaft member 50 from the portion fixed to the permanent magnet 12M, the large-diameter fitting portion 50A, the male screw portion 50B, the small-diameter fitting portion 50C, the valve body holding portion 50D, and the valve body are sequentially arranged from the top. A retaining portion 50E is provided side by side. The outer diameter of the large-diameter fitting portion 50A, the male screw portion 50B, the small-diameter fitting portion 50C, and the valve body holding portion 50D gradually decreases from the top toward the bottom. Further, the valve body retaining portion 50E has a so-called truncated cone shape that gradually tapers toward the lower end side, and the outer diameter of the upper surface thereof is slightly smaller than the outer diameter of the small-diameter fitting portion 50C. The outer diameter of the valve body holding portion 50D is larger. Further, the rotary shaft member 50 is formed by resistance welding of another part (see FIG. 3) having a boundary surface between the small diameter fitting portion 50C and the valve body holding portion 50D. Before performing resistance welding of these separate parts, the valve body 51 made of a cylindrical resin and the compression coil spring 52 are fitted to the valve body holding portion 50D, and the separate parts are resistance-welded. The valve body 51 is pressed against the valve body retaining portion 50E by the generated force.

図１に示すように、円筒ケース１４の端部開口は、端部構成部材１３によって塞がれている。端部構成部材１３は、例えば円筒ケース１４と同心軸上に延びた本発明に係る弁口構成部材２１と、その弁口構成部材２１の軸方向の中間部分に鑞付けされた本発明に係る環状板金部材２２とからなる。また、その弁口構成部材２１は、軸形ベース２３と螺合筒２４と１対のパイプ１１Ａ，１１Ａとを組み付けてなる。詳細には、軸形ベース２３は、全体として例えば円柱形状をなし、その一端面から軸方向の途中部分まで、軸芯部分に沿って軸孔２５が形成されている。 As shown in FIG. 1, the end opening of the cylindrical case 14 is closed by the end component member 13. For example, the end component 13 is a valve port component 21 according to the present invention that extends concentrically with the cylindrical case 14 and an axial intermediate portion of the valve port component 21 according to the present invention. It consists of an annular sheet metal member 22. Further, the valve port constituting member 21 is formed by assembling a shaft-shaped base 23, a threaded cylinder 24, and a pair of pipes 11A and 11A. Specifically, the shaft base 23 has, for example, a cylindrical shape as a whole, and a shaft hole 25 is formed along the shaft core portion from one end surface to a middle portion in the axial direction.

軸形ベース２３には、軸孔２５を挟むようにして軸形ベース２３の周方向に１８０度の間隔を空けて１対の連結孔２３Ａ，２３Ａが形成されている。そして、各連結孔２３Ａにパイプ１１Ａを挿入して鑞付けされている。また、各連結孔２３Ａの奥部の中心にはそれぞれ弁口２３Ｂが形成され、これら弁口２３Ｂを介して両パイプ１１Ａ，１１Ａの内部空間１１Ｃと軸孔２５とが連通している。また、軸形ベース２３の一端面からは、軸孔２５の開口を囲むようにして円筒壁２３Ｔが起立している。 The shaft base 23 is formed with a pair of connecting holes 23A and 23A at an interval of 180 degrees in the circumferential direction of the shaft base 23 so as to sandwich the shaft hole 25. And the pipe 11A is inserted and brazed to each connecting hole 23A. In addition, a valve port 23B is formed at the center of each connection hole 23A, and the internal space 11C of both pipes 11A and 11A and the shaft hole 25 communicate with each other through these valve ports 23B. A cylindrical wall 23 T is erected from one end surface of the shaft base 23 so as to surround the opening of the shaft hole 25.

なお、本実施形態では、上記したパイプ１１Ａの内部空間１１Ｃと弁口２３Ｂ，２３Ｂと軸孔２５とによって、本発明に係る「弁口構成部材に形成された流路」が構成されている。 In the present embodiment, the above-described internal space 11C of the pipe 11A, the valve ports 23B and 23B, and the shaft hole 25 constitute the “flow path formed in the valve port component” according to the present invention.

螺合筒２４は、全体として円筒形状をなし、その内側には、上から順番に、大径嵌合部２４Ａと雌螺子部２４Ｂと小径嵌合部２４Ｃとが並べて備えられている。また、螺合筒２４の外側の下端部には、外径が段付き状に大きくなった大径部２４Ｄが備えている。そして、螺合筒２４の大径部２４Ｄを、前記軸形ベース２３の円筒壁２３Ｔ内に挿入してその円筒壁２３Ｔの先端をかしめることで、軸形ベース２３と螺合筒２４とが一体固定されている。この状態で、螺合筒２４の内部空間と軸形ベース２３の軸孔２５とが連通した状態になり、そこに前記した回転軸部材５０が挿入されている。 The screwing cylinder 24 has a cylindrical shape as a whole, and a large-diameter fitting portion 24A, a female screw portion 24B, and a small-diameter fitting portion 24C are arranged in that order from the top. The lower end portion on the outer side of the screwing cylinder 24 is provided with a large diameter portion 24D whose outer diameter is increased in a stepped shape. Then, by inserting the large diameter portion 24D of the screwing cylinder 24 into the cylindrical wall 23T of the shaft-shaped base 23 and caulking the tip of the cylindrical wall 23T, the shaft-shaped base 23 and the screwing cylinder 24 are connected. It is fixed integrally. In this state, the internal space of the screw cylinder 24 and the shaft hole 25 of the shaft base 23 are in communication with each other, and the rotary shaft member 50 is inserted therein.

回転軸部材５０と螺合筒２４との間では、雌雄の螺子部２４Ｂ，５０Ｂ同士が螺合している。これにより、永久磁石１２Ｍと共に回転軸部材５０が回転すると、回転軸部材５０が上下方向に直動する。また、それら雌雄の螺子部２４Ｂ，５０Ｂが螺合部分を挟むようにして、回転軸部材５０及び螺合筒２４の大径嵌合部２４Ａ，５０Ａ同士と、小径嵌合部２４Ｃ，５０Ｃ同士とが嵌合されている。これにより、回転軸部材５０が螺合部分を挟んで２点支持されてスムーズに回転する。 Between the rotating shaft member 50 and the screwing cylinder 24, the male and female screw parts 24B, 50B are screwed together. Accordingly, when the rotary shaft member 50 rotates together with the permanent magnet 12M, the rotary shaft member 50 moves linearly in the vertical direction. Further, the male and female screw portions 24B and 50B sandwich the screwing portion so that the large-diameter fitting portions 24A and 50A of the rotary shaft member 50 and the screwing cylinder 24 and the small-diameter fitting portions 24C and 50C are fitted to each other. Are combined. As a result, the rotating shaft member 50 is supported at two points with the screwing portion interposed therebetween and rotates smoothly.

また、回転軸部材５０の先端に備えた弁体５１は、回転軸部材５０の直動動作に伴って軸形ベース２３の軸孔２５内を直動する。そして、図６〜図８に示すように、弁体５１の直動位置に応じて、両弁口２３Ｂ，２３Ｂの開度が変わる。なお、弁口２３Ｂに異物（切粉等）が入り込んだ状態で、弁体５１にて弁口２３Ｂを閉塞した場合、図９に示すように、弁体５１が圧縮コイルバネ５２を押し縮めるようにして移動する。これにより、弁体５１と軸孔２５の内面との間に異物Ｇが食い込んで電動弁１０が動作不能になることを防止することができる。 Further, the valve body 51 provided at the tip of the rotating shaft member 50 moves directly in the shaft hole 25 of the shaft-shaped base 23 as the rotating shaft member 50 moves linearly. Then, as shown in FIGS. 6 to 8, the opening degree of both valve ports 23 B and 23 B changes according to the linear motion position of the valve body 51. In addition, when the valve port 23B is closed by the valve body 51 in a state in which foreign matter (chip or the like) has entered the valve port 23B, the valve body 51 causes the compression coil spring 52 to be compressed as shown in FIG. Move. Thereby, it can prevent that the foreign material G bites in between the valve body 51 and the inner surface of the shaft hole 25, and the motor-operated valve 10 becomes inoperable.

図１に示すように、環状板金部材２２は、底壁２２Ａの外縁部から周壁２２Ｂを立ち上げ、その周壁２２Ｂの開口端から側方に鍔部２２Ｃを張り出した形状になっている。また、底壁２２Ａの中心には貫通孔がなされている。これにより環状板金部材２２全体が環状構造になっている。なお、周壁２２Ｂは円筒ケース１４と同径になっている。そして、環状板金部材２２を、軸形ベース２３における円筒壁２３Ｔの外側に嵌合しかつ軸形ベース２３の端面に面当接させた状態にして、環状板金部材２２の内縁部と円筒壁２３Ｔとが鑞付けされている。 As shown in FIG. 1, the annular sheet metal member 22 has a shape in which a peripheral wall 22B is raised from an outer edge portion of the bottom wall 22A, and a flange portion 22C is projected laterally from the opening end of the peripheral wall 22B. A through hole is formed in the center of the bottom wall 22A. As a result, the entire annular sheet metal member 22 has an annular structure. The peripheral wall 22B has the same diameter as the cylindrical case 14. Then, the annular sheet metal member 22 is fitted to the outside of the cylindrical wall 23T of the shaft-shaped base 23 and is brought into surface contact with the end surface of the shaft-shaped base 23, and the inner edge portion of the annular sheet metal member 22 and the cylindrical wall 23T. And has been garnished.

環状板金部材２２の鍔部２２Ｃに対応させて、円筒ケース１４の開口端からは鍔部１４Ｃが側方に向けて張り出されている。また、円筒ケース１４の鍔部１４Ｃは、環状板金部材２２の鍔部２２Ｃより若干径が小さくなっている。そして、円筒ケース１４の鍔部１４Ｃを環状板金部材２２の鍔部２２Ｃに当接させた状態にして、鍔部１４Ｃの外縁部が鍔部２２Ｃに蝋付けされている。 Corresponding to the flange portion 22 C of the annular sheet metal member 22, the flange portion 14 C projects from the opening end of the cylindrical case 14 toward the side. Further, the flange portion 14 C of the cylindrical case 14 is slightly smaller in diameter than the flange portion 22 C of the annular sheet metal member 22. The outer edge portion of the flange portion 14C is brazed to the flange portion 22C with the flange portion 14C of the cylindrical case 14 in contact with the flange portion 22C of the annular sheet metal member 22.

図４に示すように環状板金部材２２には、鍔部２２Ｃから短冊状の張出係合部２２Ｅが延設されている。また、張出係合部２２Ｅには、円形の係合孔２２Ｆが貫通形成されている。 As shown in FIG. 4, the annular sheet metal member 22 has a strip-like overhanging engagement portion 22E extending from the flange portion 22C. A circular engagement hole 22F is formed through the overhanging engagement portion 22E.

この張出係合部２２Ｅに対応させて、ステーター１２Ｓには保持片３５が形成されている。保持片３５は、ステーター１２Ｓの外周面に固定された帯板材の一端を、ステーター１２Ｓの端面１２Ｔから起立させかつ途中で直角に屈曲してなり、前記ステーター１２Ｓの端面１２Ｔに対向している。また、図１に示すように、保持片３５には、ステーター１２Ｓの端面１２Ｔに向けてエンボス３５Ａが突出形成されている。 A holding piece 35 is formed on the stator 12S so as to correspond to the overhanging engagement portion 22E. The holding piece 35 is formed such that one end of a strip plate fixed to the outer peripheral surface of the stator 12S is raised from the end surface 12T of the stator 12S and bent at a right angle in the middle, and faces the end surface 12T of the stator 12S. As shown in FIG. 1, the holding piece 35 is formed with an emboss 35A protruding toward the end surface 12T of the stator 12S.

ステーター１２Ｓの端面１２Ｔには、樹脂プレート３６が敷設されている。樹脂プレート３６は、図２に示すように、ステーター１２Ｓの内縁部に敷設されたリング部３６Ａから１対の突片３６Ｂ，３６Ｂを相反する方向に張り出してなり、その一方の突片３６Ｂが、ステーター１２Ｓの端面１２Ｔにおいて保持片３５との対向部分に配され、他方の突片３６Ｂが、ステーター１２Ｓに取り付けられた固定片３７とステーター１２Ｓの端面１２Ｔとの間に挟まれて固定されている（図１参照）。 A resin plate 36 is laid on the end surface 12T of the stator 12S. As shown in FIG. 2, the resin plate 36 projects from the ring portion 36 A laid on the inner edge of the stator 12 S in a direction opposite to the pair of projecting pieces 36 B and 36 B. The other projecting piece 36B is disposed between the fixing piece 37 attached to the stator 12S and the end face 12T of the stator 12S, and is fixed to the portion facing the holding piece 35 on the end face 12T of the stator 12S. (See FIG. 1).

本実施形態の電動弁１０を組み付けるには、以下の通りである。軸形ベース２３にパイプ１１Ａ，１１Ａを鑞付けしかつ軸形ベース２３に螺合筒２４を組み付けて弁口構成部材２１を完成させる（図５参照）。そして、その弁口構成部材２１に環状板金部材２２を蝋付けし、弁口構成部材２１と環状板金部材２２とを１部品にしておく。 The assembly of the motor-operated valve 10 of the present embodiment is as follows. The pipes 11A and 11A are brazed to the shaft base 23 and the threaded cylinder 24 is assembled to the shaft base 23 to complete the valve port component 21 (see FIG. 5). And the annular sheet-metal member 22 is brazed to the valve-portion structural member 21, and the valve-portion structural member 21 and the annular sheet-metal member 22 are made into one component.

次いで、ローター１２Ｒにおける回転軸部材５０を弁口構成部材２１の螺合筒２４内に螺合組み付けし、この状態で円筒ケース１４をローター１２Ｒの外側に挿入する。そして、円筒ケース１４の鍔部１４Ｃを環状板金部材２２の鍔部２２Ｃに当接させた状態にして、鍔部１４Ｃを鍔部２２Ｃに蝋付けする。なお、前記した蝋付けに代えて、図１０に示すように溶接により鍔部１４Ｃ，２２Ｃ自体を溶かして固着させてもよい。 Next, the rotary shaft member 50 in the rotor 12R is screwed and assembled into the screwing cylinder 24 of the valve port constituting member 21, and the cylindrical case 14 is inserted outside the rotor 12R in this state. Then, the flange portion 14C of the cylindrical case 14 is brought into contact with the flange portion 22C of the annular sheet metal member 22, and the flange portion 14C is brazed to the flange portion 22C. Instead of the brazing described above, the collar portions 14C and 22C themselves may be melted and fixed by welding as shown in FIG.

次いで、図５に示すように、ステーター１２Ｓを円筒ケース１４に嵌合し、張出係合部２２Ｅを保持片３５からずらし、ステーター１２Ｓを円筒ケース１４の鍔部１４Ｃまで押し込む。この状態で、ステーター１２Ｓと円筒ケース１４とを相対的に回転させると、図１に示すように、保持片３５とステーター１２Ｓの端面１２Ｔ（詳細には、端面１２Ｔに敷設された樹脂プレート３６）との間に張出係合部２２Ｅが差し込まれ、保持片３５のエンボス３５Ａが、張出係合部２２Ｅの係合孔２２Ｆに凹凸係合する。これにより、ステーター１２Ｓが円筒ケース１４に回り止めされかつ抜け止めされている。 Next, as shown in FIG. 5, the stator 12 S is fitted into the cylindrical case 14, the overhanging engagement portion 22 E is shifted from the holding piece 35, and the stator 12 S is pushed into the flange portion 14 C of the cylindrical case 14. When the stator 12S and the cylindrical case 14 are relatively rotated in this state, as shown in FIG. 1, the holding piece 35 and the end surface 12T of the stator 12S (specifically, the resin plate 36 laid on the end surface 12T) And the embossing 35A of the holding piece 35 is engaged with the engagement hole 22F of the overhanging engagement portion 22E. Thereby, the stator 12S is prevented from rotating around the cylindrical case 14 and is prevented from coming off.

このように本実施形態の電動弁１０によれば、環状板金部材２２に対する円筒ケース１４との鑞付け部分と、弁口構成部材２１との鑞付け部分とが離れているので、環状板金部材２２を、弁口構成部材２１に先に鑞付けして１部品（端部構成部材１３）とし、その１部品に円筒ケース１４を鑞付けすることができる。これにより、３部品を同時に鑞付けしていた従来の電動弁より、電動弁１０を構成する部品同士の組み付け精度が向上し、ステーター係合部３５と張出係合部２２Ｅとの係合が安定する。 Thus, according to the motor-operated valve 10 of this embodiment, since the brazing part with the cylindrical case 14 with respect to the annular sheet metal member 22 and the brazing part with the valve port component 21 are separated, the annular sheet metal member 22 is separated. Can be brazed first to the valve opening component 21 to form one component (end component 13), and the cylindrical case 14 can be brazed to the one component. As a result, the assembly accuracy of the components constituting the motor-operated valve 10 is improved as compared with the conventional motor-operated valve in which the three components are brazed at the same time, and the engagement between the stator engaging portion 35 and the overhanging engaging portion 22E is improved. Stabilize.

［第２実施形態］
本実施形態の電動弁９０は、図１１〜図１８に示されており、環状板金部材７０と円筒ケース１４との固着部分の構造と、ステーター１２Ｓを円筒ケース１４に固定するための構造とが前記第１実施形態と異なる。以下、第１実施形態と異なる構成に関してのみ説明し、第１実施形態と同一の構成に関しては同一符号を付して重複した説明は省略する。 [Second Embodiment]
The motor-operated valve 90 of this embodiment is shown in FIGS. 11 to 18, and includes a structure of a fixing portion between the annular sheet metal member 70 and the cylindrical case 14 and a structure for fixing the stator 12 S to the cylindrical case 14. Different from the first embodiment. Hereinafter, only the configuration different from that of the first embodiment will be described, and the same configuration as that of the first embodiment will be denoted by the same reference numerals and redundant description will be omitted.

図１１に示すように、本実施形態の環状板金部材７０は、円板上の底壁７０Ａの縁部から円筒状の嵌合壁７０Ｂを起立した構造になっている。この嵌合壁７０Ｂは、円筒ケース１４の端部に形成された拡径部６０の内側に嵌合され、図１２に示すように、嵌合壁７０Ｂと拡径部６０とが重なった部分を外側から溶接してこれら環状板金部材７０と円筒ケース１４とが固着されている。 As shown in FIG. 11, the annular sheet metal member 70 of the present embodiment has a structure in which a cylindrical fitting wall 70B is erected from the edge of the bottom wall 70A on the disk. The fitting wall 70B is fitted inside the enlarged diameter portion 60 formed at the end of the cylindrical case 14, and, as shown in FIG. 12, the portion where the fitted wall 70B and the enlarged diameter portion 60 overlap is formed. The annular sheet metal member 70 and the cylindrical case 14 are fixed by welding from the outside.

円筒ケース１４の開口縁からは側方に張出係合部６１が張り出している。図１３に示すように、張出係合部６１は、円筒ケース１４を中心にした略楕円形をなし、その張出係合部６１のうち円筒ケース１４からの張り出し量が最も大きくなった２位置には半円孔６３，６３が形成されている。各半円孔６３は、張出係合部６１の先端に開放しており、張出係合部６１の外縁部と半円孔６３の内縁部とがなす角部６３Ｃは、丸みを帯びている。 From the opening edge of the cylindrical case 14, a projecting engagement portion 61 projects laterally. As shown in FIG. 13, the overhanging engagement portion 61 has a substantially oval shape centered on the cylindrical case 14, and the amount of overhang from the cylindrical case 14 is the largest among the overhanging engagement portions 61 2. Semi-circular holes 63 and 63 are formed at the positions. Each semicircular hole 63 is open to the tip of the overhanging engagement portion 61, and a corner 63C formed by the outer edge portion of the overhanging engagement portion 61 and the inner edge portion of the semicircular hole 63 is rounded. Yes.

図１４に示すように、ステーター１２Ｓの端面１２Ｔからは、１対の係合アーム６５，６５が円筒ケース１４を挟んで対向するように起立している。具体的には、各係合アーム６５は、ステーター１２Ｓの周面に固定された帯板材をステーター１２Ｓの端面１２Ｔに沿うように屈曲させてステーター１２Ｓの中心側に延ばし、途中で端面１２Ｔから起立させてなる。 As shown in FIG. 14, a pair of engaging arms 65, 65 stand up from the end surface 12 T of the stator 12 S so as to face each other with the cylindrical case 14 interposed therebetween. Specifically, each engagement arm 65 bends the strip plate material fixed to the peripheral surface of the stator 12S along the end surface 12T of the stator 12S, extends to the center side of the stator 12S, and stands up from the end surface 12T in the middle. Let me.

各係合アーム６５の先端部には、係合湾曲部６６が形成されている。係合湾曲部６６は、係合アーム６５を構成する帯板材の先端部を円筒ケース１４から離れる側に湾曲させた山形状になっている。また、係合湾曲部６６には、アーム突部６７が形成されている。図１７に示すように、アーム突部６７は、係合湾曲部６６のうち係合アーム６５の幅方向の中央に相当する部分を、円筒ケース１４側に突出させた構造になっている。 An engagement bending portion 66 is formed at the distal end portion of each engagement arm 65. The engagement bending portion 66 has a mountain shape in which the end portion of the band plate material constituting the engagement arm 65 is bent to the side away from the cylindrical case 14. Further, an arm protrusion 67 is formed on the engagement bending portion 66. As shown in FIG. 17, the arm protrusion 67 has a structure in which a portion corresponding to the center of the engagement arm 65 in the width direction of the engagement bending portion 66 protrudes toward the cylindrical case 14.

本実施形態の電動弁９０において、ステーター１２Ｓを円筒ケース１４に固定するには以下の通りである。即ち、ステーター１２Ｓを円筒ケース１４に嵌合し、図１５及び図１７に示すように、略楕円形の張出係合部６１のうち円筒ケース１４からの張り出し量が比較的小さい部分を、１対の係合アーム６５，６５の間に配置する。この状態からステーター１２Ｓを円筒ケース１４に対して回転させると、各係合アーム６５のアーム突部６７が、張出係合部６１の外縁部に摺接し、両係合アーム６５，６５の間が押し広げられる。そして、アーム突部６７が張出係合部６１の半円孔６３と対向したところで、図１８に示すように、１対の係合アーム６５，６５の弾発力によってアーム突部６７と半円孔６３とが凹凸係合し、ステーター１２Ｓが回り止めされる。このとき、張出係合部６１の先端部が、図１６に示すように係合湾曲部６６に収まることでステーター１２Ｓが円筒ケース１４に抜け止めされる。 In the motor operated valve 90 of the present embodiment, the stator 12S is fixed to the cylindrical case 14 as follows. That is, the stator 12S is fitted to the cylindrical case 14, and a portion of the substantially elliptical overhanging engagement portion 61 with a relatively small amount of protrusion from the cylindrical case 14 as shown in FIGS. It arrange | positions between a pair of engagement arms 65 and 65. FIG. When the stator 12S is rotated with respect to the cylindrical case 14 from this state, the arm protrusions 67 of the respective engagement arms 65 are brought into sliding contact with the outer edge portion of the overhanging engagement portion 61, and between the engagement arms 65, 65. Will be spread. Then, when the arm projection 67 faces the semicircular hole 63 of the overhanging engagement portion 61, as shown in FIG. 18, the arm projection 67 and the half projection due to the elastic force of the pair of engagement arms 65, 65 are provided. The circular hole 63 engages with the concave and convex portions, and the stator 12S is prevented from rotating. At this time, the stator 12S is prevented from being detached from the cylindrical case 14 by the distal end portion of the overhanging engagement portion 61 being accommodated in the engagement bending portion 66 as shown in FIG.

本実施形態の電動弁９０によれば、前記第１実施形態と同様に作用効果に加え、ステーター１２Ｓが嵌合される円筒ケース１４に張出係合部６１が一体形成されているので、円筒ケース１４以外の部品に張出係合部６１が形成された場合に比べて、ステーター１２Ｓに備えた係合アーム６５と張出係合部６１との相対位置のばらつきが抑えられ、それら張出係合部６１と係合アーム６５との係合が安定する。また、環状板金部材７０に備えた嵌合壁７０Ｂと円筒ケース１４とを嵌合することで、環状板金部材７０と円筒ケース１４との芯出しを容易に行うことができる。 According to the motor-operated valve 90 of the present embodiment, in addition to the function and effect similar to the first embodiment, the overhanging engagement portion 61 is integrally formed with the cylindrical case 14 into which the stator 12S is fitted. Compared with the case where the overhanging engagement portion 61 is formed on a part other than the case 14, variations in the relative positions of the engagement arm 65 and the overhanging engagement portion 61 provided in the stator 12S are suppressed, and the overhanging engagement portions 61 are suppressed. The engagement between the engagement portion 61 and the engagement arm 65 is stabilized. Further, by fitting the fitting wall 70 B provided in the annular sheet metal member 70 and the cylindrical case 14, the annular sheet metal member 70 and the cylindrical case 14 can be easily centered.

［第３実施形態］
本実施形態の電動弁９１は、図１９及び図２０に示されており、ステーター１２Ｓが第１実施形態と同一構造をなし、ステーター１２Ｓ以外の全部品が第２実施形態と同一構造になっている。 [Third Embodiment]
The motor-operated valve 91 of the present embodiment is shown in FIGS. 19 and 20, and the stator 12S has the same structure as that of the first embodiment, and all components other than the stator 12S have the same structure as that of the second embodiment. Yes.

本実施形態では、ステーター１２Ｓを円筒ケース１４に嵌合し、図１９に示すように、張出係合部６１の半円孔６３を保持片３５からずらした状態にしてステーター１２Ｓを円筒ケース１４の鍔部１４Ｃまで押し込む。この状態で、ステーター１２Ｓと円筒ケース１４とを相対的に回転させると、図２０に示すように、保持片３５とステーター１２Ｓの端面１２Ｔ（詳細には、端面１２Ｔに敷設された樹脂プレート３６）との間に張出係合部６１が差し込まれ、保持片３５のエンボス３５Ａが、張出係合部６１の半円孔６３に凹凸係合する。これにより、ステーター１２Ｓが円筒ケース１４に回り止めされかつ抜け止めされている。 In the present embodiment, the stator 12S is fitted into the cylindrical case 14, and the stator 12S is placed in the cylindrical case 14 with the semicircular hole 63 of the overhanging engagement portion 61 shifted from the holding piece 35 as shown in FIG. Push down to 14C. When the stator 12S and the cylindrical case 14 are relatively rotated in this state, as shown in FIG. 20, the holding piece 35 and the end surface 12T of the stator 12S (specifically, the resin plate 36 laid on the end surface 12T) And the embossing 35A of the holding piece 35 engages with the semicircular hole 63 of the overhanging engagement portion 61 in an uneven manner. Thereby, the stator 12S is prevented from rotating around the cylindrical case 14 and is prevented from coming off.

［他の実施形態］
本発明は、前記実施形態に限定されるものではなく、例えば、以下に説明するような実施形態も本発明の技術的範囲に含まれ、さらに、下記以外にも要旨を逸脱しない範囲内で種々変更して実施することができる。 [Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

（１）前記第１〜第３の各実施形態では、１対のパイプ１１Ａ，１１Ａが軸形ベース２３から相反する方向に延びた構造であったが、従来例として説明した図２１の電動弁のように、両パイプの軸方向が直角に交差するように配されたタイプの電動弁に本発明を適用してもよい。 (1) In each of the first to third embodiments, the pair of pipes 11A, 11A has a structure extending in the opposite direction from the shaft base 23, but the motor-operated valve shown in FIG. As described above, the present invention may be applied to a motor-driven valve of a type in which the axial directions of both pipes intersect at right angles.

（２）前記第１〜第３の各実施形態の環状板金部材２２，７０は、底壁２２Ａ，７０Ａから周壁２２Ｂ又は嵌合壁７０Ｂが起立して略容器構造になっていたが、環状板金部材は平板構造であってもよい。 (2) The annular sheet metal members 22, 70 of the first to third embodiments have a substantially container structure with the peripheral wall 22B or the fitting wall 70B standing from the bottom walls 22A, 70A. The member may have a flat plate structure.

本発明の第１実施形態に係る電動弁の側断面図1 is a side sectional view of a motor operated valve according to a first embodiment of the present invention. ステーターの底面図Bottom view of stator 回動軸部材の分解側面図Exploded side view of rotating shaft member 円筒ケースの端部の平断面図Plan sectional view of the end of the cylindrical case 電動弁の側断面図Side view of motorized valve 弁口が全閉した状態の側断面図Cross-sectional side view with valve port fully closed 弁口が半開した状態の側断面図Side cross-sectional view with valve opening half open 弁口が全開した状態の側断面図Side cross-sectional view with valve opening fully open 弁口と弁体との間に異物が挟まった状態の側断面図Cross-sectional side view with foreign matter sandwiched between valve opening and valve body 環状板金部材と円筒ケースとの溶接部分を示した断面図Sectional view showing the welded portion between the annular sheet metal member and the cylindrical case 第２実施形態の電動弁の部分側断面図Partial sectional side view of the motor operated valve of the second embodiment 環状板金部材と円筒ケースとの溶接部分を示した断面図Sectional view showing the welded portion between the annular sheet metal member and the cylindrical case 円筒ケースの端部の平断面図Plan sectional view of the end of the cylindrical case ステーターを円筒ケースに嵌合する前の状態の側面図Side view of the state before the stator is fitted into the cylindrical case ステーターを円筒ケースに嵌合した状態の側面図Side view of the stator fitted in the cylindrical case 係合アームが張出係合部に係合した状態の側面図Side view of the state where the engagement arm is engaged with the overhanging engagement portion 係合アームと張出係合部とが係合する前の状態の平断面図Plan sectional view of the state before the engagement arm and the overhanging engagement portion are engaged 係合アームと張出係合部とが係合した後の状態の平断面図Plan sectional view of the state after the engagement arm and the overhanging engagement portion are engaged 第３実施形態の電動弁の側面図Side view of electric valve of third embodiment その電動弁の保持片が張出係合部に係合した状態の側面図Side view of the state in which the holding piece of the electric valve is engaged with the overhanging engagement portion 従来の電動弁の側断面図Side sectional view of a conventional motorized valve

Explanation of symbols

１０，９０，９１電動弁
１２ステッピングモーター
１２Ａ電磁コイル
１２Ｒローター
１２Ｓステーター
１２Ｔ端面
１４円筒ケース
２１弁口構成部材
２２，７０環状板金部材
２２Ｅ，６１張出係合部
２２Ｆ係合孔
２３Ｂ弁口
３５保持片
３５Ａエンボス
５０回転軸部材
５１弁体
６３半円孔
６５係合アーム
６６係合湾曲部
６７アーム突部
７０Ｂ嵌合壁
10, 90, 91 Motorized valve 12 Stepping motor 12A Electromagnetic coil 12R Rotor 12S Stator 12T End face 14 Cylindrical case 21 Valve opening component member 22, 70 Annular sheet metal member 22E, 61 Overhang engagement part 22F Engagement hole 23B Valve opening 35 Holding Piece 35A Emboss 50 Rotating shaft member 51 Valve body 63 Semi-circular hole 65 Engagement arm 66 Engagement bending part 67 Arm projection part 70B Fitting wall

Claims

An electric valve (10, 90, 91) using a motor (12) as a drive source,
Of the rotor (12R) and stator (12S) constituting the motor (12), the rotor (12R) is fitted on the inside and the stator (12S) is fitted on the outside. Case (14);
An annular sheet metal member (22, 70) welded or brazed to the open end of the cylindrical case (14);
A valve opening component (21) welded or brazed to a portion of the annular sheet metal member (22, 70) remote from the welded or brazed portion with the cylindrical case (14);
A flow path (11C, 23B, 25) formed in the valve port component (21);
A valve port (23B) provided in the middle of the flow path (11C, 23B, 25);
A valve body (51) connected to the rotor (12R) and opening and closing the valve port (23B) in conjunction with rotation of the rotor (12R);
An overhanging unit integrally formed with either the cylindrical case (14) or the annular sheet metal member (22, 70) and projecting laterally from the cylindrical case (14) or the annular sheet metal member (22, 70). Joint (22E, 61),
A motor-operated valve (10, 90, 91) provided with a stator engaging portion (35, 65) provided on the stator (12S) and engaged with the overhang engaging portion (22E, 61). ).

The motor-operated valve (90, 91) according to claim 1, wherein the overhanging engaging portion (61) is integrally formed with the cylindrical case (14).

The motor-operated valve according to claim 1 or 2, wherein the annular sheet metal member (70) is formed with a fitting wall (70B) fitted inside or outside the cylindrical case (14). (90, 91).

A holding piece that stands up from the end surface (12T) of the stator (12S) and bends at a right angle and sandwiches the projecting engagement portion (22E, 61) with the end surface (12T) of the stator (12S) ( 35) as the stator engaging portion (35), and the holding piece (35) is formed with an emboss (35A) toward the end surface (12T) of the stator (12S),
The overhanging engagement part (61) is formed with a semicircular hole (63) in which the embossing (35A) engages with the concave and convex portions and is opened at the tip of the overhanging engagement part (61). The motor-operated valve (91) according to any one of claims 1 to 3.

The overhanging engagement part (61) has a substantially elliptical shape centered on the cylindrical case (14) or the annular sheet metal member (70), and the cylindrical case ( 14) or two positions where the amount of protrusion from the annular sheet metal member (70) is the largest, a semicircular hole (63) opened at the tip of the protrusion engaging portion (61) is formed,
A pair of engaging arms (65) standing up from an end surface (12T) of the stator (12S) and facing the cylindrical case (14) are provided as the stator engaging portion (65), and the engaging arms An engagement bending portion (66) that curves the distal end portion of (65) away from the cylindrical case (14) and receives the distal end portion of the overhanging engagement portion (61);
An arm protrusion (67) is provided in which a part of the engagement bending portion (66) protrudes toward the cylindrical case (14) and is engaged with the semicircular hole (63) in an uneven manner. The motor-operated valve (90) according to any one of claims 1 to 3.