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JP2019090514A - Motor valve - Google Patents

Motor valve Download PDF

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JP2019090514A
JP2019090514A JP2017221204A JP2017221204A JP2019090514A JP 2019090514 A JP2019090514 A JP 2019090514A JP 2017221204 A JP2017221204 A JP 2017221204A JP 2017221204 A JP2017221204 A JP 2017221204A JP 2019090514 A JP2019090514 A JP 2019090514A
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valve
guide bush
motor
valve shaft
valve body
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JP6618977B2 (en
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吉田 竜也
Tatsuya Yoshida
竜也 吉田
将志 矢沢
Masashi Yazawa
将志 矢沢
友一 木内
Yuichi Kiuchi
友一 木内
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Fujikoki Corp
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Fujikoki Corp
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Priority to CN201811203523.0A priority patent/CN109798363A/en
Publication of JP2019090514A publication Critical patent/JP2019090514A/en
Priority to JP2019205189A priority patent/JP6933398B2/en
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Abstract

To provide a motor valve capable of suppressing deterioration of operability.SOLUTION: A motor valve comprises: a valve shaft 10 provided with a valve element 14; a guide bush 20 into which the valve shaft 10 is inserted so as to be able to relatively move and relatively rotate in an axial direction; a valve body 40 provided in the guide bush 20; and a screw feeding mechanism 28 for lifting/lowering the valve element 14 with respect to a valve seat 46a according to rotation of a rotor 51. In at least one of a male screw part 23 of the guide bush 20 and a female screw part 33 of a valve shaft holder 30 constituting the screw feeding mechanism, a vertically penetrated groove 33t is provided over the entire length in a lifting/lowering direction (axial O direction).SELECTED DRAWING: Figure 1

Description

本発明は、空気調和機、冷凍機等の冷凍サイクルに流量制御弁等として組み込まれて使用される電動弁に係り、特に、雄ねじ部と雌ねじ部とからなるねじ送り機構によってモータの回転運動を直線運動に変換して弁体を昇降させるタイプの電動弁に関する。   The present invention relates to a motorized valve used as a flow control valve or the like in a refrigeration cycle of an air conditioner, a refrigerator, etc., and in particular, the rotational movement of the motor is performed by a screw feed mechanism consisting of an external thread and an internal thread. The present invention relates to a motor-operated valve of a type which converts it into a linear motion and raises and lowers the valve body.

例えば、モータ駆動型の電動弁は、モータの回転運動を雄ねじ部と雌ねじ部とから構成されるねじ送り機構によって直線運動に変換することにより、弁体を弁座に対して昇降させて弁の開閉(つまり、弁口を通過する流体(冷媒)の流量制御)を行っている。   For example, a motor drive type motorized valve moves a valve body up and down with respect to a valve seat by converting a rotational movement of the motor into a linear movement by a screw feed mechanism including an external thread and an internal thread. Opening and closing (that is, flow control of fluid (refrigerant) passing through the valve port) is performed.

この種の電動弁としては、例えば、下端部に弁体が設けられた弁軸と、該弁軸が軸線方向に相対移動可能及び相対回転可能な状態で内挿される円筒部を有するガイドブッシュと、前記弁体が接離する弁シート部(弁座)を有すると共に前記ガイドブッシュが取付固定された弁本体と、前記ガイドブッシュが内挿される円筒部と前記弁軸の上端部が挿通される挿通穴が貫設された天井部とを有すると共に、前記弁軸と連結固定される弁軸ホルダと、前記弁体を閉弁方向に付勢すべく前記弁軸と前記弁軸ホルダとの間に介装された付勢部材と、前記弁軸ホルダを前記ガイドブッシュに対して回転させるためのロータ及びステータを有するモータと、前記ガイドブッシュの外周に形成された固定ねじ部(雄ねじ部)と前記弁軸ホルダの内周に形成された可動ねじ部(雌ねじ部)とからなり、前記ロータの回転駆動に応じて前記弁軸の前記弁体を前記弁シート部(弁座)に対して昇降させるためのねじ送り機構と、前記弁軸ホルダの回転下動規制を行うべく、前記ガイドブッシュの前記固定ねじ部に螺着される雌ねじ部を持つ下部ストッパに設けられた固定ストッパ体と、前記弁軸ホルダに設けられた可動ストッパ体とからなる下部ストッパ機構と、を備え、前記弁体が最下降位置にあるときに、前記弁体と前記弁シート部(弁座)との間に所定の大きさの間隙が形成されているものが知られている(例えば、特許文献1参照)。   As this type of motor-operated valve, for example, a valve stem having a valve body at its lower end, and a guide bush having a cylindrical portion into which the valve stem is inserted so as to be relatively movable and relatively rotatable in the axial direction. A valve body having a valve seat portion (valve seat) to which the valve body contacts and separates, and a valve body to which the guide bush is attached and fixed, a cylindrical portion into which the guide bush is inserted, and an upper end portion of the valve shaft A valve shaft holder having a ceiling through which a through hole is formed and connected and fixed to the valve shaft, and between the valve shaft and the valve shaft holder to bias the valve body in the valve closing direction. And a motor having a rotor and a stator for rotating the valve shaft holder with respect to the guide bush, and a fixed screw portion (male screw portion) formed on the outer periphery of the guide bush. Formed on the inner circumference of the valve stem holder A screw feed mechanism for moving up and down the valve body of the valve shaft with respect to the valve seat portion (valve seat) according to the rotational drive of the rotor, and a movable screw portion (female screw portion) A fixed stopper body provided on a lower stopper having a female screw portion screwed to the fixed screw portion of the guide bush so as to restrict the rotational movement of the shaft holder, and a movable stopper body provided on the valve shaft holder And a lower stopper mechanism, and a gap of a predetermined size is formed between the valve body and the valve seat portion (valve seat) when the valve body is at the lowest position. Those are known (see, for example, Patent Document 1).

前記した如くの閉弁レスタイプの電動弁を用いた空調機では、弁体が最下降位置(通常なら全閉状態となる)にあるときでも、弁座との間に所定の大きさの間隙が形成されるため、例えば、除湿運転を深夜に行う場合、電動弁を全閉状態にすることなく冷媒量を絞った状態で運転でき、電動弁のオン/オフによる作動音の発生を抑制することができる。また、前記した如くの電動弁では、通常の閉弁タイプの電動弁と比べて、弁座への弁体の喰いつきも確実に防止できるといった利点もある。   In the air conditioner using the valve-less type motor-operated valve as described above, a gap of a predetermined size between the valve seat and the valve seat even when the valve body is in the lowermost position (which is normally fully closed). Therefore, for example, when dehumidifying operation is performed at midnight, it is possible to operate with the amount of refrigerant squeezed without fully closing the motor-operated valve, and suppress generation of operation noise due to on / off of the motor-operated valve. be able to. In addition, the motor-operated valve as described above has an advantage that it is possible to reliably prevent the sticking of the valve body to the valve seat as compared with a normal valve-closing type motor-operated valve.

また、弁体を弁座に対して昇降させるためのねじ送り機構として、弁軸の外周に形成された雄ねじ部とガイドブッシュの内周に形成された雌ねじ部とを利用したものなども既に知られている(例えば、特許文献2参照)。   Also, as a screw feed mechanism for moving the valve body up and down with respect to the valve seat, one using an external thread portion formed on the outer periphery of the valve stem and an internal thread portion formed on the inner periphery of the guide bush etc. (See, for example, Patent Document 2).

特開2016−217451号公報JP, 2016-217451, A 特開2016−089870号公報JP, 2016-089870, A

ところで、この種の電動弁において、ねじ送り機構を構成する雄ねじ部と雌ねじ部との間(ねじ面間)に異物が噛み込むと、摺動抵抗が増加して、弁軸が動きにくくなる動作不良が発生するおそれがある。   By the way, in the motor-operated valve of this type, when foreign matter bites in between the male screw and female screw constituting the screw feed mechanism (between screw surfaces), the sliding resistance increases and the valve shaft becomes difficult to move. There is a risk of defects.

また、近年では、低コスト化、軽量化等に伴い、ねじ送り機構を構成する雄ねじ部や雌ねじ部を持つ部品にPPSなどの樹脂材を使用するケースが増加している。この場合、成形効率の良い割り型での成形によって、前記した雄ねじ部や雌ねじ部を持つ部品を作製することが考えられる。しかし、割り型での成形を採用した場合、雄ねじ部や雌ねじ部の摺動面(ねじ面)にパーティングラインやウェルドライン(ゲート位置によって発生する場所が異なるが、成形時に材料同士がぶつかり合って盛り上がったり、材料の到達が不十分なショートが発生する箇所)が発生し、これらが摺動の妨げになって、動作性が低下する等の不具合が発生する懸念がある。   Further, in recent years, with the cost reduction, weight reduction, etc., cases where resin materials such as PPS are used for parts having a male screw part and a female screw part constituting a screw feeding mechanism are increasing. In this case, it is conceivable to produce a part having the above-mentioned male screw part and female screw part by molding with a split mold with high molding efficiency. However, when split molding is employed, parting lines and weld lines (the locations generated depending on the gate position) differ on the sliding surfaces (screw surfaces) of the male and female screw parts, but the materials collide with each other during molding There is a concern that problems such as a decrease in operability may occur due to the occurrence of swelling or a location where a short circuit occurs due to insufficient arrival of the material.

本発明は、前記課題に鑑みてなされたものであって、その目的とするところは、動作性の低下を抑制することのできる電動弁を提供することにある。   This invention is made in view of the said subject, Comprising: The place made into the objective is to provide the electrically-driven valve which can suppress the fall of operativity.

上記する課題を解決するために、本発明に係る電動弁は、基本的に、弁体が設けられた弁軸と、該弁軸が軸線方向に相対移動可能及び相対回転可能に内挿されるガイドブッシュと、前記弁体が接離する弁座付きの弁口を有するとともに前記ガイドブッシュが設けられた弁本体と、前記弁軸に連結される弁軸ホルダと、前記弁本体に固定されたキャンと、前記弁軸ホルダを前記ガイドブッシュに対して回転させるための、前記弁軸ホルダに連結されたロータ及びステータを有するモータと、前記ロータの回転駆動に応じて前記弁軸の前記弁体を前記弁本体の前記弁座に対して昇降させるための、前記ガイドブッシュと前記弁軸ホルダとの間に設けられた雄ねじ部及び雌ねじ部を有するねじ送り機構と、を備え、前記雄ねじ部又は前記雌ねじ部の少なくとも一方に、昇降方向全長に亘る縦貫溝が設けられていることを特徴としている。   In order to solve the problems described above, the motor-operated valve according to the present invention basically comprises a valve shaft provided with a valve body and a guide in which the valve shaft is inserted so as to be relatively movable and relatively rotatable in the axial direction. A valve body having a bush, a valve port with a valve seat to which the valve body contacts and separates, and provided with the guide bush, a valve shaft holder connected to the valve shaft, and a can fixed to the valve body A motor having a rotor and a stator connected to the valve shaft holder for rotating the valve shaft holder with respect to the guide bush; and the valve element of the valve shaft according to the rotational drive of the rotor And a screw feeding mechanism having an external thread and an internal thread provided between the guide bush and the valve shaft holder for raising and lowering the valve body relative to the valve seat, the external thread or the internal thread. Department of Even without one, running through the grooves over the lifting direction entire length is characterized by being provided.

好ましい態様では、前記縦貫溝は、前記雄ねじ部又は前記雌ねじ部が設けられた前記ガイドブッシュ又は前記弁軸ホルダの壁面の昇降方向全長に亘って延設される。   In a preferred aspect, the longitudinal groove is extended over the entire length of the guide bush provided with the male screw portion or the female screw portion or the wall surface of the valve shaft holder in the raising and lowering direction.

他の好ましい態様では、前記縦貫溝は、前記雌ねじ部に設けられた凹状面で構成される。   In another preferred embodiment, the longitudinal groove is formed of a concave surface provided on the female screw.

他の好ましい態様では、前記縦貫溝は、前記雄ねじ部に設けられた凹状面もしくはDカット面で構成される。   In another preferred embodiment, the longitudinal groove is formed of a concave surface or a D-cut surface provided on the male screw portion.

別の好ましい態様では、前記縦貫溝は、前記雄ねじ部又は前記雌ねじ部のパーティングライン或いはウェルドラインに沿って形成される。   In another preferred embodiment, the longitudinal groove is formed along a parting line or a weld line of the external thread or the internal thread.

また、本発明に係る電動弁は、基本的に、弁体が設けられた弁軸と、該弁軸が内挿されるガイドブッシュと、前記弁体が接離する弁座付きの弁口を有するとともに前記ガイドブッシュが設けられた弁本体と、前記弁本体に設けられたキャンと、前記弁軸を前記ガイドブッシュに対して回転させるためのロータ及びステータを有するモータと、前記ロータの回転駆動に応じて前記弁軸の前記弁体を前記弁本体の前記弁座に対して昇降させるための、雄ねじ部及び雌ねじ部を有するねじ送り機構と、を備え、前記雄ねじ部又は前記雌ねじ部の少なくとも一方に、昇降方向全長に亘る縦貫溝が設けられていることを特徴としている。   Moreover, the motor-operated valve according to the present invention basically has a valve shaft provided with a valve body, a guide bush into which the valve shaft is inserted, and a valve port with a valve seat to which the valve body contacts and separates. A valve body provided with the guide bush, a can provided in the valve body, a motor having a rotor and a stator for rotating the valve shaft with respect to the guide bush, and rotational driving of the rotor A screw feed mechanism having an external thread portion and an internal thread portion for moving the valve body of the valve stem up and down with respect to the valve seat of the valve main body; at least one of the external thread portion or the internal thread portion A vertical penetration groove is provided over the entire length in the vertical direction.

本発明によれば、ねじ送り機構を構成する雄ねじ部又は雌ねじ部の少なくとも一方に、昇降方向全長に亘る縦貫溝が設けられるので、昇降方向全長に亘って雄ねじ部と雌ねじ部とが噛み合っていない部分(ねじ面同士が接していない部分)である前記縦貫溝を通って流体(冷媒)がスムーズに流れるようになり、雄ねじ部と雌ねじ部との間(ねじ面間)に侵入する異物を当該縦貫溝を介して積極的に排出できるため、噛み込みのリスクを低減して、動作性の低下を抑制することができる。   According to the present invention, since at least one of the male screw portion and the female screw portion constituting the screw feed mechanism is provided with a longitudinal through groove extending over the entire length in the lifting and lowering direction, the male and female threads are not engaged over the entire length in the lifting and lowering direction. The fluid (refrigerant) flows smoothly through the longitudinal groove, which is a portion (a portion where the screw surfaces are not in contact with each other), and foreign matter which enters between the male screw portion and the female screw portion (between screw surfaces) Since the fluid can be positively discharged through the longitudinal groove, the risk of biting can be reduced, and the decrease in operability can be suppressed.

また、仮に雄ねじ部と雌ねじ部との間(ねじ面間)に異物を噛み込んだ場合でも、雄ねじ部と雌ねじ部との相対回転によって異物が移動せしめられ、雄ねじ部と雌ねじ部とが噛み合っていない前記縦貫溝から前記異物が排出されるため、動作性の低下を確実に抑制することができる。   Also, even if foreign matter is bitten between the male and female screw parts (between screw surfaces), the foreign material is moved by relative rotation between the male and female screw parts, and the male and female screw parts are engaged. Since the foreign matter is discharged from the non-perforated longitudinal groove, the decrease in operability can be reliably suppressed.

また、雄ねじ部又は雌ねじ部のパーティングライン或いはウェルドラインに沿って、凹状面やDカット面で構成される縦貫溝が形成されるので、それらによって摺動が阻害されなくなり、動作性の低下をより確実に抑制することができる。   In addition, along the parting line or weld line of the male screw part or the female screw part, a vertical through groove composed of a concave surface or a D-cut surface is formed. This can be suppressed more reliably.

本発明に係る電動弁の第1実施形態を示す縦断面図。BRIEF DESCRIPTION OF THE DRAWINGS The longitudinal cross-sectional view which shows 1st Embodiment of the motor operated valve which concerns on this invention. 図1に示される弁軸ホルダを示し、(A)は斜視図、(B)は上面図。The valve-shaft holder shown by FIG. 1 is shown, (A) is a perspective view, (B) is a top view. 図1のU−U矢視線に従う断面図。FIG. 2 is a cross-sectional view taken along the line U-U in FIG. 図1に示される弁軸ホルダを示す、図3のV−V矢視線に従う断面図。FIG. 5 is a cross-sectional view taken along line V-V in FIG. 3, showing the valve stem holder shown in FIG. 1; 本発明に係る電動弁の第2実施形態を示す縦断面図。The longitudinal cross-sectional view which shows 2nd Embodiment of the motor operated valve which concerns on this invention. 図5のU−U矢視線に従う断面図。FIG. 6 is a cross-sectional view taken along the line U-U in FIG. 5. 図5に示される弁軸ホルダを示す、図6のV−V矢視線に従う断面図。FIG. 7 is a cross-sectional view taken along line VV of FIG. 6, showing the valve stem holder shown in FIG. 5; 本発明に係る電動弁の第3実施形態を示す縦断面図。The longitudinal cross-sectional view which shows 3rd Embodiment of the motor operated valve which concerns on this invention. 図8のU−U矢視線に従う断面図。FIG. 9 is a cross-sectional view taken along the line U-U in FIG. 図8に示されるガイドブッシュを示す左側面図。FIG. 9 is a left side view showing the guide bush shown in FIG. 8; 本発明に係る電動弁の第4実施形態を示す縦断面図。The longitudinal cross-sectional view which shows 4th Embodiment of the motor operated valve which concerns on this invention. 図11のU−U矢視線に従う断面図。FIG. 12 is a cross-sectional view taken along the line U-U in FIG. 図11に示されるガイドブッシュを示す左側面図。The left view which shows the guide bush shown by FIG.

以下、本発明の実施形態を図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

なお、各図において、部材間に形成される隙間や部材間の離隔距離等は、発明の理解を容易にするため、また、作図上の便宜を図るため、誇張して描かれている場合がある。また、本明細書において、上下、左右等の位置、方向を表わす記述は、図1等の方向矢印表示を基準としており、実際の使用状態での位置、方向を指すものではない。   In each of the drawings, the gaps formed between the members, the separation distance between the members, etc. may be drawn in an exaggerated manner in order to facilitate understanding of the invention and for convenience of drawing. is there. Further, in the present specification, the description indicating the position and direction such as upper and lower and right and left is based on the direction arrow display of FIG. 1 etc., and does not indicate the position and direction in the actual use state.

[第1実施形態]
図1は、本発明に係る電動弁の第1実施形態を示す縦断面図である。
First Embodiment
FIG. 1 is a longitudinal sectional view showing a first embodiment of the motor-operated valve according to the present invention.

図示実施形態の電動弁1は、空気調和機、冷凍機等の冷凍サイクルに流量制御弁等として組み込まれて使用されるもので、主に、弁体14が設けられた弁軸10と、ガイドブッシュ20と、弁軸ホルダ30と、弁本体40と、キャン55と、ロータ51とステータ52とからなるステッピングモータ50と、圧縮コイルばね(付勢部材)60と、ストッパとしての固定部材70と、ねじ送り機構28と、下部ストッパ機構29とを備える。   The motor-operated valve 1 of the illustrated embodiment is used by being incorporated as a flow control valve or the like in a refrigeration cycle such as an air conditioner or a refrigerator, mainly using a valve shaft 10 provided with a valve body 14 and a guide A stepping motor 50 comprising a bush 20, a valve shaft holder 30, a valve body 40, a can 55, a rotor 51 and a stator 52, a compression coil spring (biasing member) 60, and a fixing member 70 as a stopper , A screw feed mechanism 28 and a lower stopper mechanism 29.

前記弁軸10は、上側から、上部小径部11と、中間大径部12と、下部小径部13とを有し、その下部小径部13の下端部に、弁口46を流れる流体(冷媒)の通過流量を制御するための段付き逆円錐状の弁体14が一体的に形成されている。   The valve shaft 10 has an upper small diameter portion 11, an intermediate large diameter portion 12, and a lower small diameter portion 13 from the upper side, and a fluid (refrigerant) flowing through the valve port 46 to the lower end of the lower small diameter portion 13. A stepped inverted conical valve body 14 is integrally formed to control the flow rate of passing through the valve.

前記ガイドブッシュ20は、例えば樹脂製とされ、前記弁軸10(の中間大径部12)が軸線O方向に相対移動(摺動)可能及び軸線O回りに相対回転可能な状態で内挿される円筒部21と、該円筒部21の上端部から上方に延びており、該円筒部21よりも内径が大きく、前記弁軸10の中間大径部12の上端側と上部小径部11の下端側とが内挿される延設部22とを有している。前記ガイドブッシュ20の円筒部21の外周には、ロータ51の回転駆動に応じて前記弁軸10の弁体14を弁本体40の弁座46aに対して昇降させるねじ送り機構28の一方を構成する固定ねじ部(雄ねじ部)23が形成されている。また、前記円筒部21の下部(固定ねじ部23より下側の部分)は、大径とされ、弁本体40の嵌合穴44への嵌合部27とされる。前記固定ねじ部23(における弁軸ホルダ30より下側)には、下部ストッパ25が螺着されており、その下部ストッパ25の外周には、弁軸ホルダ30の回転下動規制を行う下部ストッパ機構29の一方を構成する固定ストッパ体24が一体的に突設されている。なお、本例では、嵌合部27の上面27aは、下部ストッパ25の下動規制を行う(言い換えれば、後述する着座状態における下部ストッパ25の位置を規定する)ストッパ部とされる。   The guide bush 20 is made of, for example, resin, and is inserted in such a manner that (the intermediate large diameter portion 12 of) the valve shaft 10 can be relatively moved (slidable) in the direction of the axis O and relatively rotatable around the axis O The cylindrical portion 21 extends upward from the upper end portion of the cylindrical portion 21. The inner diameter is larger than that of the cylindrical portion 21. The upper end side of the middle large diameter portion 12 and the lower end side of the upper small diameter portion 11 of the valve shaft 10 And an extending portion 22 to be interpolated. One end of a screw feed mechanism 28 configured to raise and lower the valve body 14 of the valve shaft 10 with respect to the valve seat 46 a of the valve main body 40 according to the rotational drive of the rotor 51 is formed on the outer periphery of the cylindrical portion 21 of the guide bush 20. The fixing screw portion (male screw portion) 23 is formed. Further, the lower portion of the cylindrical portion 21 (the portion below the fixing screw portion 23) has a large diameter, and serves as a fitting portion 27 to the fitting hole 44 of the valve main body 40. The lower stopper 25 is screwed to the fixed screw portion 23 (in the lower side than the valve shaft holder 30 in the above), and the lower stopper that regulates the rotational downward movement of the valve shaft holder 30 on the outer periphery of the lower stopper 25. A fixed stopper body 24 constituting one of the mechanisms 29 is integrally provided in a projecting manner. In the present embodiment, the upper surface 27a of the fitting portion 27 is a stopper portion that regulates the downward movement of the lower stopper 25 (in other words, defines the position of the lower stopper 25 in the seating state described later).

また、本例では、前記ガイドブッシュ20(の固定ねじ部23)に取着された下部ストッパ25に、ストッパ押さえ48が外装されており、当該ストッパ押さえ48によって下部ストッパ25がガイドブッシュ20(の固定ねじ部23)に対して回転不能に連結されている(後で詳述)。   Further, in the present embodiment, the lower stopper 25 attached to (the fixing screw portion 23 of) the guide bush 20 has the stopper presser 48 covered by the stopper presser 48. It is non-rotatably connected to the fixing screw portion 23) (described in detail later).

前記弁軸ホルダ30は、例えば樹脂製(好ましくは、固定部材70との接触を考慮して、耐摩耗性の高いSUSや炭素繊維等で強化された樹脂製)とされ、前記ガイドブッシュ20が内挿される円筒部31と前記弁軸10(の上部小径部11)の上端部が(軸線O方向に相対移動可能及び軸線O回りに相対回転可能な状態で)挿通される挿通穴32aが貫設された天井部32とを有している。前記弁軸ホルダ30の円筒部31の内周下部には、前記ガイドブッシュ20の固定ねじ部23と螺合して前記ねじ送り機構28を構成する可動ねじ部(雌ねじ部)33が形成されている。また、円筒部31の内周上部は、前記ガイドブッシュ20の円筒状の延設部22の外周に当接(摺接)せしめられ、これにより、当該弁軸ホルダ30がガイドブッシュ20(の外周)にガイドされながら軸線O方向(上下方向)に昇降せしめられるようになっている。また、その円筒部31の外周下端には、前記下部ストッパ機構29の他方を構成する可動ストッパ体34が一体的に突設されている。   The valve shaft holder 30 is, for example, made of resin (preferably made of resin reinforced with SUS, carbon fiber or the like having high abrasion resistance in consideration of contact with the fixing member 70), and the guide bush 20 is The upper end of the cylindrical portion 31 to be inserted and the upper end portion of (the upper small diameter portion 11 of) the valve shaft 10 is inserted (in a relatively movable state in the direction of the axis O and relatively rotatable around the axis O) And a ceiling 32 provided. A movable screw portion (female screw portion) 33 which is screwed with the fixed screw portion 23 of the guide bush 20 to constitute the screw feed mechanism 28 is formed at the lower inner periphery of the cylindrical portion 31 of the valve shaft holder 30 There is. Further, the inner peripheral upper portion of the cylindrical portion 31 is brought into contact (sliding contact) with the outer periphery of the cylindrical extension portion 22 of the guide bush 20, whereby the valve shaft holder 30 is ), And can be raised and lowered in the direction of the axis O (vertical direction) while being guided by the At the lower end of the outer periphery of the cylindrical portion 31, a movable stopper body 34 constituting the other of the lower stopper mechanism 29 is integrally provided in a protruding manner.

また、前記弁軸ホルダ30の天井部32の上面(後述する固定部材70のフランジ部72との対向面)には、図1とともに図2を参照すればよくわかるように、平面視で(軸線O方向で視て)略扇形状(ここでは、中心角が約90度の扇形状)の2つの凸部35が一体に形成されている。詳しくは、前記2つの凸部35は、天井部32の上面における挿通穴32a周り(言い換えれば、弁軸ホルダ30の回転軸線O周り)で軸線Oに対して反対側に(言い換えれば、弁軸ホルダ30の回転軸線Oに対して対称となる位置に)上向きに突設されるとともに、その間(本例では、前記可動ストッパ体34の周方向の一端面34aの上方部分、つまり、軸線O方向で視たときに前記可動ストッパ体34の周方向の一端面34aと同じ位置を含む部分)が切り欠かれた形状を有している(平面視で略扇形状(ここでは、中心角が約90度の扇形状)の切欠き36)。   In addition, the upper surface of the ceiling portion 32 of the valve shaft holder 30 (the surface facing the flange portion 72 of the fixing member 70 described later) can be seen in plan view (axis As viewed in the O direction, two convex portions 35 having a substantially fan shape (here, a fan shape having a central angle of about 90 degrees) are integrally formed. Specifically, the two projections 35 are on the opposite side to the axis O (in other words, the valve axis) around the insertion hole 32a in the upper surface of the ceiling 32 (in other words, around the rotation axis O of the valve shaft holder 30). While projecting upward at a position symmetrical with respect to the rotation axis O of the holder 30, and in the meantime (in this example, the upper portion of one end face 34a in the circumferential direction of the movable stopper body 34, ie, the axis O direction) When viewed in a section including the same position as one end face 34a in the circumferential direction of the movable stopper 34) (a substantially fan shape (in this case, the central angle is about 90 degrees fan-shaped) notch 36).

前記の凸部35によって、固定部材70に対する弁軸ホルダ30の接触面積が減少するため、例えば、弁軸ホルダ30が固定部材70に当接するときの接触抵抗(回転摺動抵抗)が小さくなる。   The contact area (rotational sliding resistance) when the valve shaft holder 30 abuts on the fixing member 70 is reduced, for example, because the contact area of the valve shaft holder 30 with the fixing member 70 is reduced by the convex portion 35.

また、例えば、前記弁軸ホルダ30が樹脂等の成形品で作製されている場合、成形時に形成されるウェルドラインやパーティングラインの位置と切欠き36の位置とを合わせる、すなわち、成形時にウェルドラインやパーティングラインが形成される箇所に切欠き36を設けることにより、前記接触抵抗(回転摺動抵抗)をさらに小さくできるとともに、前記弁軸ホルダ30の摺動面の平坦度が高くなり、弁軸10の軸ずれをさらに抑えることができる。   Also, for example, when the valve shaft holder 30 is made of a molded product such as resin, the position of the weld line or parting line formed at the time of molding is matched with the position of the notch 36, that is, weld at the time of molding By providing the notches 36 at locations where lines or parting lines are formed, the contact resistance (rotational sliding resistance) can be further reduced, and the flatness of the sliding surface of the valve shaft holder 30 becomes high. The axial misalignment of the valve stem 10 can be further suppressed.

例えば、弁軸ホルダ30における可動ストッパ体34の逆側に成形用の樹脂を注入するためのゲートが設けられる場合、前述のように、可動ストッパ体34の上方(より具体的には、可動ストッパ体34の周方向の一端面34aの上方部分)に切欠き36を設けることにより、前記弁軸ホルダ30の凸部35には、成形時に形成されるウェルドラインやパーティングラインが存在しなくなるので、前記接触抵抗(回転摺動抵抗)をさらに小さくできるとともに、前記弁軸ホルダ30の摺動面の平坦度が高くなり、弁軸10の軸ずれをさらに抑えることができる。   For example, when a gate for injecting a molding resin is provided on the opposite side of the movable stopper body 34 in the valve shaft holder 30, as described above, the upper side of the movable stopper body 34 (more specifically, the movable stopper By providing the notch 36 in the upper part of one end face 34a in the circumferential direction of the body 34, the convex portion 35 of the valve shaft holder 30 has no weld line or parting line formed at the time of molding. The contact resistance (rotational sliding resistance) can be further reduced, the flatness of the sliding surface of the valve shaft holder 30 can be increased, and the axial displacement of the valve shaft 10 can be further suppressed.

また、弁軸ホルダ30の天井部32の上面において前記凸部35を弁軸ホルダ30の回転軸線Oに対して対称に配置することで、弁軸10の軸ずれをより効果的に抑えられるとともに、前記凸部35を弁軸ホルダ30の回転軸線O周りの複数の箇所に分散して配置することで、固定部材70に対する弁軸ホルダ30(の凸部35)の接触面積をさらに減少させることが可能となる。   Further, by arranging the convex portions 35 symmetrically on the upper surface of the ceiling portion 32 of the valve shaft holder 30 with respect to the rotational axis O of the valve shaft holder 30, the axial deviation of the valve shaft 10 can be suppressed more effectively. The contact area of the valve shaft holder 30 (the projection 35) with respect to the fixing member 70 is further reduced by disposing the projections 35 at a plurality of locations around the rotation axis O of the valve shaft holder 30. Is possible.

なお、前記弁軸ホルダ30の天井部32の上面に設けられる凸部35の形状、数、位置等は、図示例に限られないことは当然であるし、前記凸部35は省略してもよい。   Of course, the shape, number, position, etc. of the projections 35 provided on the upper surface of the ceiling 32 of the valve shaft holder 30 are not limited to the illustrated example, and the projections 35 may be omitted. Good.

また、前記弁軸10の上部小径部11と中間大径部12との間に形成された段丘面(段差部)15と前記弁軸ホルダ30の天井部32の下面との間には、前記弁軸ホルダ30の天井部32の下面側に配置された円板状の押さえ板(ワッシャ)61を挟んで、弁軸10の上部小径部11に外挿されるように、前記弁軸10と前記弁軸ホルダ30とが昇降方向(軸線O方向)で離れる方向に付勢する、言い換えれば前記弁軸10(弁体14)を常時下方(閉弁方向)に付勢する円筒状の圧縮コイルばね(付勢部材)60が縮装されている。   Further, between the terraced surface (stepped portion) 15 formed between the upper small diameter portion 11 and the middle large diameter portion 12 of the valve stem 10 and the lower surface of the ceiling portion 32 of the valve stem holder 30, The valve shaft 10 and the above-mentioned valve shaft 10 and the above are inserted so as to be externally inserted into the upper small diameter portion 11 of the valve shaft 10 with the disc-shaped pressing plate (washer) 61 disposed on the lower surface side of the ceiling portion 32 of the valve shaft holder 30 interposed therebetween. A cylindrical compression coil spring which urges the valve shaft holder 30 away from the valve shaft holder 30 in the raising and lowering direction (axial line O direction), in other words, always urges the valve shaft 10 (valve body 14) downward (valve closing direction). The (biasing member) 60 is contracted.

前記弁本体40は、例えば真鍮やSUS等の金属製円筒体から構成されている。この弁本体40は、内部に流体が導入導出される弁室40aを有し、該弁室40aの側部に設けられた横向きの第1開口41に第1導管41aがろう付け等により連結固定され、該弁室40aの天井部に前記弁軸10(の中間大径部12)が軸線O方向に相対移動(摺動)可能及び軸線O回りに相対回転可能な状態で挿通される挿通穴43及び前記ガイドブッシュ20の下部(嵌合部27)が嵌合されて取付固定される嵌合穴44が形成され、該弁室40aの下部に設けられた縦向きの第2開口42に第2導管42aがろう付け等により連結固定されている。また、前記弁室40aと前記第2開口42との間の底部壁45に、前記弁体14が接離する弁座46aを有する段付きの弁口46が形成されている。   The valve body 40 is made of, for example, a metal cylinder such as brass or SUS. The valve main body 40 has a valve chamber 40a into which a fluid is introduced and discharged, and the first conduit 41a is connected and fixed to the first transverse opening 41 provided on the side of the valve chamber 40a by brazing or the like. (The intermediate large diameter portion 12 of the valve shaft 10 is relatively movable (slidable) in the direction of the axis O in the ceiling portion of the valve chamber 40a and is inserted in a relatively rotatable state about the axis O) 43 and a lower part (fitting part 27) of the guide bush 20 are formed to form a fitting hole 44 to be fitted and fixed, and the second vertical opening 42 provided at the lower part of the valve chamber 40a 2 The conduits 42a are connected and fixed by brazing or the like. Further, on the bottom wall 45 between the valve chamber 40a and the second opening 42, a stepped valve port 46 having a valve seat 46a with which the valve body 14 contacts and separates is formed.

前記弁本体40の上端部外周には円環状の鍔状板47がかしめ、ろう付け等により固着されるとともに、該鍔状板47の外周に設けられた段差部に、天井付き円筒状のキャン55の下端部が突き合わせ溶接等により密封接合されている。   An annular cage plate 47 is caulked on the outer periphery of the upper end portion of the valve body 40 and fixed by brazing or the like, and a cylindrical can with a ceiling is provided on a step portion provided on the periphery of the cage plate 47. The lower end portion of 55 is hermetically joined by butt welding or the like.

また、本例では、前記鍔状板47の上面(キャン55側の表面)に、前記下部ストッパ25に係合して当該下部ストッパ25のガイドブッシュ20に対する相対回転を防止するストッパ押さえ48が配置固定されている。   Further, in the present embodiment, a stopper presser 48 which engages with the lower stopper 25 to prevent relative rotation of the lower stopper 25 with respect to the guide bush 20 is disposed on the upper surface (surface on the can 55) of the wedge plate 47. It is fixed.

前記ストッパ押さえ48は、例えば真鍮やSUS等の金属部材からプレス加工等にて作製された円板状部材からなり、前記下部ストッパ25が挿通される嵌挿穴が形成されるとともに、その嵌挿穴に隣接して(言い換えれば、嵌挿穴の外周部分に)、前記下部ストッパ25(の外面)を挟持する複数個(図1にはそのうちの2個が示される)の支持爪49が立設されている(詳細構造は、例えば上記特許文献1参照)。   The stopper presser 48 is, for example, a disc-like member manufactured by press working or the like from a metal member such as brass or SUS, and a fitting insertion hole through which the lower stopper 25 is inserted is formed. Adjacent to the hole (in other words, on the outer peripheral portion of the insertion hole), a plurality of (two of which are shown in FIG. 1) support claws 49 which hold (the outer surface of) the lower stopper 25 stand. (For the detailed structure, see, for example, Patent Document 1 above).

このストッパ押さえ48の外周部分が、鍔状板47(の上面)に当接せしめられて溶接・溶着・接着等により接合固定されることにより、下部ストッパ25は、ガイドブッシュ20(の固定ねじ部23)に対して相対回転不能に連結される。   The lower stopper 25 is fixed to the guide bush 20 (a fixing screw portion of the guide bush 20) by the outer peripheral portion of the stopper presser 48 being brought into contact with (the upper surface of) the wedge plate 47 and joined and fixed by welding, welding, adhesion or the like. It is connected non-rotatably relative to 23).

前記キャン55の内側かつ前記ガイドブッシュ20及び前記弁軸ホルダ30の外側には、ロータ51が回転自在に配在され、前記キャン55の外側に、前記ロータ51を回転駆動すべく、ヨーク52a、ボビン52b、ステータコイル52c、及び樹脂モールドカバー52d等からなるステータ52が配置されている。ステータコイル52cには、複数のリード端子52eが接続され、これらのリード端子52eには、基板52fを介して複数のリード線52gが接続され、ステータコイル52cへの通電励磁によってキャン55内に配在されたロータ51が軸線O回りで回転するようになっている。   A rotor 51 is rotatably disposed inside the can 55 and outside the guide bush 20 and the valve shaft holder 30, and a yoke 52a is provided outside the can 55 so as to rotationally drive the rotor 51. A stator 52 including a bobbin 52b, a stator coil 52c, and a resin mold cover 52d is disposed. A plurality of lead terminals 52e are connected to the stator coil 52c, and a plurality of lead wires 52g are connected to the lead terminals 52e via the substrate 52f, and distributed in the can 55 by energization excitation to the stator coil 52c. The existing rotor 51 is designed to rotate around the axis O.

キャン55内に配在された前記ロータ51は、前記弁軸ホルダ30に係合支持されており、当該弁軸ホルダ30は前記ロータ51とともに(一体に)回転するようになっている。   The rotor 51 disposed in the can 55 is engaged with and supported by the valve shaft holder 30, and the valve shaft holder 30 is configured to rotate together with the rotor 51 (integrally).

詳細には、前記ロータ51は、内筒51a、外筒51b、及び内筒51aと外筒51bとを軸線O回りの所定の角度位置で接続する接続部51cからなる二重管構成とされ、内筒51aの内周に、(例えば、軸線O回りで120度の角度間隔で)軸線O方向(上下方向)に延びる縦溝51dが形成されている。   In detail, the rotor 51 has a double pipe configuration including an inner cylinder 51a, an outer cylinder 51b, and a connecting portion 51c connecting the inner cylinder 51a and the outer cylinder 51b at a predetermined angular position around the axis O, A longitudinal groove 51 d extending in the direction of the axis O (vertical direction) (for example, at an angular interval of 120 degrees around the axis O) is formed on the inner periphery of the inner cylinder 51 a.

一方、前記弁軸ホルダ30の外周(の上半部分)には、図2を参照すればよくわかるように、その上端に円錐台面からなるテーパ面部30cが設けられ、そのテーパ面部30cの下側に、(例えば、軸線O回りで120度の角度間隔で)上下方向に延びる突条30aが突設され、その突条30aの下部両側には、前記ロータ51を支持する上向きの係止面30bが形成されている。   On the other hand, on the outer periphery (upper half of the valve shaft holder 30), as is well understood with reference to FIG. 2, a tapered surface portion 30c consisting of a truncated conical surface is provided at the upper end thereof. In the upper and lower direction (for example, at an angular interval of 120 degrees around the axis O), projecting ridges 30a are provided, and on the lower sides of the ridges 30a, an upward engaging surface 30b for supporting the rotor 51. Is formed.

このように、ロータ51の内筒51aの縦溝51dと弁軸ホルダ30の突条30aとが係合し、かつロータ51の内筒51aの下面と弁軸ホルダ30の係止面30bとが当接することにより、ロータ51が弁軸ホルダ30に対して位置合わせされた状態でその外周に支持固定され、前記弁軸ホルダ30は、前記ロータ51を前記キャン55内で支持しながら当該ロータ51とともに回転される。   Thus, the vertical groove 51d of the inner cylinder 51a of the rotor 51 engages with the projection 30a of the valve shaft holder 30, and the lower surface of the inner cylinder 51a of the rotor 51 and the locking surface 30b of the valve shaft holder 30 By abutting, the rotor 51 is supported and fixed on the outer periphery in a state of being aligned with the valve shaft holder 30, and the valve shaft holder 30 supports the rotor 51 in the can 55 while the rotor 51 is supported. Co-rotated with

なお、本例では、弁軸ホルダ30の上面がロータ51の内筒51aの上面と面一あるいはそれより若干上側に位置するように、前記ロータ51が前記弁軸ホルダ30に係合支持されている。   In the present embodiment, the rotor 51 is engaged with and supported by the valve shaft holder 30 so that the upper surface of the valve shaft holder 30 is flush with or slightly above the upper surface of the inner cylinder 51a of the rotor 51. There is.

前記ロータ51及び弁軸ホルダ30の上側には、弁軸ホルダ30とロータ51との昇降方向における相対移動を防止する(言い換えれば、弁軸ホルダ30に対してロータ51を下方に押し付けて抜け止め係止する)とともに弁軸10と弁軸ホルダ30とを連結すべく、前記弁軸10(の上部小径部11)の上端部に外嵌固定された固定部材70が配在されている。   The relative movement between the valve shaft holder 30 and the rotor 51 in the vertical direction is prevented above the rotor 51 and the valve shaft holder 30 (in other words, the rotor 51 is pressed downward against the valve shaft holder 30 to prevent removal) In order to connect the valve stem 10 and the valve stem holder 30 with each other, a fixing member 70 externally fitted and fixed to the upper end portion of (the upper small diameter portion 11 of) the valve stem 10 is disposed.

前記固定部材70は、例えば真鍮やSUS等の金属部材からプレス加工、切削加工等にて作製され、前記弁軸10(の上部小径部11)の上端部に外嵌されて圧入、溶接、溶着、接着等により接合固定された小径上部71aと大径下部71bとからなる段付き円筒状の固定部71と、該固定部71(の大径下部71b)の下端部からロータ51の内筒51a付近まで外向きに延びる円板状のフランジ部72とを有する。   The fixing member 70 is made of, for example, a metal member such as brass or SUS by press working, cutting, etc., and is externally fitted to the upper end portion of (the upper small diameter portion 11 of) the valve shaft 10 for press fitting, welding, welding , A stepped cylindrical fixing portion 71 including a small diameter upper portion 71a and a large diameter lower portion 71b joined and fixed by adhesion or the like, and an inner cylinder 51a of the rotor 51 from the lower end portion of the fixing portion 71 (large diameter lower portion 71b) And a disk-like flange portion 72 extending outward to the vicinity.

前記フランジ部72の下面は、前記弁軸ホルダ30の上面及びロータ51(の内筒51a)の上面に対向せしめられるとともに、その弁軸ホルダ30の上面に設けられた凸部35(の上面)及びロータ51(の内筒51aの上面)に対接せしめられるようになっている。   The lower surface of the flange portion 72 is opposed to the upper surface of the valve shaft holder 30 and the upper surface of (the inner cylinder 51a of the rotor 51), and the convex portion 35 (upper surface) provided on the upper surface of the valve shaft holder 30 And the rotor 51 (the upper surface of the inner cylinder 51a of the rotor 51).

前記したように、前記ロータ51は、圧縮コイルばね60の付勢力により上方に付勢される弁軸ホルダ30と前記固定部材70(のフランジ部72の外周部分)の間で挟持されて抜け止め係止される。   As described above, the rotor 51 is held between the valve shaft holder 30 urged upward by the urging force of the compression coil spring 60 and the fixing member 70 (the outer peripheral portion of the flange portion 72) to prevent it from coming off It is locked.

また、前記弁軸10の上端部に固定された前記固定部材70(における固定部71の大径下部71b)には、動作時にガイドブッシュ20に対して弁軸ホルダ30が上方に移動し過ぎて、ガイドブッシュ20の固定ねじ部23と弁軸ホルダ30の可動ねじ部33との螺合が外れるのを防止すべく、弁軸ホルダ30をガイドブッシュ20側に付勢するコイルばねからなる復帰ばね75が外装されている。   Further, the valve shaft holder 30 is moved to the upper side relative to the guide bush 20 too much during operation of the fixing member 70 (the large diameter lower portion 71b of the fixing portion 71 in the fixing member 70 fixed to the upper end portion of the valve shaft 10). A return spring comprising a coil spring biasing the valve shaft holder 30 toward the guide bush 20 in order to prevent disengagement of the fixed screw portion 23 of the guide bush 20 and the movable screw portion 33 of the valve shaft holder 30; There are 75 exteriors.

そして、当該電動弁1では、例えば弁座46aへの弁体14の喰いつきを防止するとともに、低流量域での制御性を確保すべく、弁体14が最下降位置(原点位置)にあるときに、弁体14と弁座46aとの間に所定の大きさの間隙が形成されるようになっている。   Then, in the motor-operated valve 1, for example, the valve body 14 is at the lowest position (home position) in order to prevent the valve body 14 from sticking to the valve seat 46a and to ensure controllability in a low flow rate region. Sometimes, a gap of a predetermined size is formed between the valve body 14 and the valve seat 46a.

この電動弁1の組立工程、特に、弁体14の原点位置(最下降位置)出し工程を詳説すると、まず、弁軸10、ガイドブッシュ20、下部ストッパ25、圧縮コイルばね60、弁軸ホルダ30、ロータ51、弁本体40、鍔状板47等を組み付ける。例えば、弁本体40に鍔状板47をろう付けし、弁本体40にガイドブッシュ20を圧入固定した後に、ガイドブッシュ20(の固定ねじ部23)に下部ストッパ25を螺着する等してそれらを組み付ける。このとき、下部ストッパ25は、ガイドブッシュ20に対して相対回転可能に螺合させておく。なお、下部ストッパ25は、この段階で、ガイドブッシュ20のストッパ部27aと当接させて配置してもよいし、そのストッパ部27aと間隔をあけて配置してもよい。次いで、弁軸10の下端部に設けられた弁体14が弁座46aに接当(着座)し、圧縮コイルばね60が若干圧縮され、弁軸ホルダ30の可動ストッパ体34と下部ストッパ25の固定ストッパ体24とが当接し、かつ、下部ストッパ25(の下面)がガイドブッシュ20のストッパ部27aと当接するまで、ガイドブッシュ20の固定ねじ部23と弁軸ホルダ30の可動ねじ部33とからなるねじ送り機構28を利用して、前記弁軸ホルダ30、ロータ51、及び弁軸10を回転させながら下降させる。そして、このように弁軸ホルダ30が最下降位置に配置された状態で、弁軸10の上端部に固定部材70を圧入、溶接、溶着、接着等により外嵌固定する(着座状態)。   The assembling process of the motor-operated valve 1, particularly, the process of bringing out the home position (the most lowered position) of the valve body 14 will be described in detail. First, the valve shaft 10, guide bush 20, lower stopper 25, compression coil spring 60, valve shaft holder 30 , The rotor 51, the valve main body 40, the bowl-like plate 47 and the like. For example, after brazing the flanged plate 47 to the valve main body 40 and press-fitting the guide bush 20 to the valve main body 40, the lower stopper 25 is screwed to (the fixing screw portion 23 of) the guide bush 20 Assemble the At this time, the lower stopper 25 is screwed to the guide bush 20 so as to be capable of relative rotation. The lower stopper 25 may be disposed in contact with the stopper portion 27a of the guide bush 20 at this stage, or may be spaced apart from the stopper portion 27a. Subsequently, the valve body 14 provided at the lower end portion of the valve shaft 10 abuts (seats) the valve seat 46 a, and the compression coil spring 60 is slightly compressed, and the movable stopper 34 and the lower stopper 25 of the valve shaft holder 30 The fixed screw portion 23 of the guide bush 20 and the movable screw portion 33 of the valve shaft holder 30 are until the fixed stopper body 24 abuts and the lower stopper 25 (the lower surface thereof) abuts the stopper portion 27a of the guide bush 20 The screw shaft holder 30, the rotor 51, and the valve shaft 10 are lowered while being rotated by using a screw feed mechanism 28 consisting of Then, in the state where the valve shaft holder 30 is disposed at the lowermost position as described above, the fixing member 70 is externally fitted and fixed to the upper end portion of the valve shaft 10 by press fitting, welding, welding, adhesion or the like (seating state).

次に、上記着座状態から、弁軸10、弁軸ホルダ30、ロータ51、固定部材70等が一体とされた組立体を、前記ねじ送り機構28を利用して回転させながら上昇させてガイドブッシュ20から取り外した後、ストッパ押さえ48を上から落し込むようにして下部ストッパ25に外装しつつ弁本体40及び鍔状板47上に載置し、下部ストッパ25をストッパ押さえ48とともにガイドブッシュ20に対して開弁方向(例えば、平面視で反時計回り)に所定回転角度だけ回転させる。そして、ストッパ押さえ48を弁本体40の鍔状板47に溶接・溶着・接着等により接合固定して、下部ストッパ25を、ガイドブッシュ20(の固定ねじ部23)に相対回転不能に連結固定した後、再びねじ送り機構28を利用して前記組立体をガイドブッシュ20に組み付ける。これにより、下部ストッパ25の固定ストッパ体24のガイドブッシュ20に対する位置が変わるので、弁軸ホルダ30の可動ストッパ体34と下部ストッパ25の固定ストッパ体24とが当接して、弁軸ホルダ30が最下降位置にあるときでも、弁体14と弁座46aとの間に所定の大きさの間隙が形成される。   Next, from the above-mentioned seating state, the assembly including the valve shaft 10, the valve shaft holder 30, the rotor 51, the fixing member 70, etc. is integrally raised while being rotated using the screw feed mechanism 28 to guide bushes. After removing it from 20, place the stopper presser 48 on the valve body 40 and the hook plate 47 while putting it on the lower stopper 25 so as to drop it from above, and place the lower stopper 25 with the stopper presser 48 against the guide bush 20 It is rotated by a predetermined rotation angle in the valve opening direction (for example, counterclockwise in plan view). Then, the stopper presser 48 is joined and fixed to the wedge-shaped plate 47 of the valve main body 40 by welding, welding, adhesion or the like, and the lower stopper 25 is connected and fixed relative to the guide bush 20 (fixed screw portion 23 thereof). Thereafter, the assembly is assembled to the guide bush 20 using the screw feed mechanism 28 again. As a result, the position of the lower stopper 25 relative to the guide bush 20 of the fixed stopper body 24 changes, so the movable stopper body 34 of the valve shaft holder 30 and the fixed stopper body 24 of the lower stopper 25 abut each other. Even in the lowest position, a gap of a predetermined size is formed between the valve body 14 and the valve seat 46a.

なお、ストッパ押さえ48を下部ストッパ25に装着する前に、下部ストッパ25をガイドブッシュ20に対して開弁方向に所定回転角度だけ回転させ、その後、ストッパ押さえ48を下部ストッパ25に外装して弁本体40の鍔状板47に接合固定してもよい。   The lower stopper 25 is rotated by a predetermined rotation angle in the valve opening direction with respect to the guide bush 20 before attaching the stopper presser 48 to the lower stopper 25, and then the stopper presser 48 is mounted on the lower stopper 25 It may be joined and fixed to the hook-like plate 47 of the main body 40.

かかる構成の電動弁1では、ステータ52(のステータコイル52c)への通電励磁によってロータ51が回転せしめられると、それと一体に弁軸ホルダ30及び弁軸10が回転せしめられる。このとき、ガイドブッシュ20の固定ねじ部23と弁軸ホルダ30の可動ねじ部33とからなるねじ送り機構28により、弁軸10が弁体14を伴って昇降せしめられ、これによって、弁体14と弁座46aとの間の間隙(リフト量、弁開度)が増減されて、冷媒等の流体の通過流量が調整される。また、弁軸ホルダ30の可動ストッパ体34とガイドブッシュ20に固定された下部ストッパ25の固定ストッパ体24とが当接し、弁体14が最下降位置にあるときでも、弁体14と弁座46aとの間に間隙が形成されるため、所定量の通過流量が確保される。   In the motor-operated valve 1 having such a configuration, when the rotor 51 is rotated by energization and energization of the stator 52 (the stator coil 52c thereof), the valve shaft holder 30 and the valve shaft 10 are rotated integrally therewith. At this time, the valve shaft 10 is moved up and down together with the valve body 14 by the screw feed mechanism 28 composed of the fixed screw portion 23 of the guide bush 20 and the movable screw portion 33 of the valve shaft holder 30. The clearance (lift amount, valve opening) between the valve seat 46a and the valve seat 46a is increased or decreased to adjust the flow rate of the fluid such as the refrigerant. Further, even when the movable stopper body 34 of the valve shaft holder 30 and the fixed stopper body 24 of the lower stopper 25 fixed to the guide bush 20 abut, and the valve body 14 is at the lowest position, the valve body 14 and the valve seat Since a gap is formed between 46a, a predetermined amount of passing flow rate is secured.

上記構成に加えて、本実施形態の電動弁1では、動作性を確保すべく、次のような方策が講じられている。   In addition to the above configuration, in the motor operated valve 1 of the present embodiment, the following measures are taken to ensure operability.

すなわち、図1とともに図3及び図4を参照すればよく分かるように、弁軸ホルダ30の円筒部31の内周に形成された可動ねじ部(雌ねじ部)33に、軸線O方向(昇降方向)全長に亘って延設された凹状面で構成される縦貫溝33tが形成されている。本例では、前記縦貫溝33tは、軸線Oに対して反対側に(言い換えれば、弁軸ホルダ30の回転軸線Oに対して対称となる位置に)2個設けられている。   That is, as can be seen well with reference to FIGS. 3 and 4 together with FIG. 1, the movable screw portion (female screw portion) 33 formed on the inner periphery of the cylindrical portion 31 of the valve shaft holder 30 A longitudinally extending groove 33t is formed of a concave surface extending over the entire length. In the present embodiment, two of the longitudinal through grooves 33t are provided on the opposite side to the axis O (in other words, at positions symmetrical with respect to the rotational axis O of the valve stem holder 30).

このように、本実施形態の電動弁1では、ねじ送り機構28を構成する弁軸ホルダ30の雌ねじ部33に、昇降方向(軸線O方向)全長に亘る縦貫溝33tが設けられるので、昇降方向(軸線O方向)全長に亘ってガイドブッシュ20の雄ねじ部23と弁軸ホルダ30の雌ねじ部33とが噛み合っていない部分(ねじ面同士が接していない部分)である前記縦貫溝33tを通って(キャン55内の)流体(冷媒)がスムーズに流れるようになり、雄ねじ部23と雌ねじ部33との間(ねじ面間)に侵入する異物を当該縦貫溝33tを介して積極的に排出できるため、噛み込みのリスクを低減して、動作性の低下を抑制することができる。   As described above, in the motor-operated valve 1 of the present embodiment, since the longitudinal groove 33t is provided in the female screw portion 33 of the valve shaft holder 30 constituting the screw feed mechanism 28 over the entire length in the elevating direction (axis O direction) (A direction of the axis O) through the longitudinal through groove 33t which is a portion where the male screw portion 23 of the guide bush 20 and the female screw portion 33 of the valve shaft holder 30 are not engaged over the entire length Fluid (refrigerant) can flow smoothly (in the can 55), and foreign matter entering between the male screw 23 and the female screw 33 (between screw surfaces) can be positively discharged through the longitudinal groove 33t. Therefore, the risk of biting can be reduced, and a decrease in operability can be suppressed.

また、仮にガイドブッシュ20の雄ねじ部23と弁軸ホルダ30の雌ねじ部33との間(ねじ面間)に異物を噛み込んだ場合でも、雄ねじ部23と雌ねじ部33との相対回転によって異物が移動せしめられ、雄ねじ部23と雌ねじ部33とが噛み合っていない前記縦貫溝33tから前記異物が排出されるため、動作性の低下を確実に抑制することができる。   Further, even if foreign matter is bitten between the male screw 23 of the guide bush 20 and the female screw 33 of the valve shaft holder 30 (between screw surfaces), the foreign material is caused by relative rotation between the male screw 23 and the female screw 33. Since the foreign matter is discharged from the longitudinal groove 33t which is moved and the male screw portion 23 and the female screw portion 33 are not meshed with each other, it is possible to reliably suppress the deterioration of the operability.

また、例えば、前記弁軸ホルダ30が樹脂等の成形品で作製されている場合、成形時に形成されるウェルドラインやパーティングラインの位置と縦貫溝33tの位置とを合わせる、すなわち、成形時に弁軸ホルダ30の雌ねじ部33に形成されるウェルドラインやパーティングラインに沿って縦貫溝33tを形成することにより、ウェルドラインやパーティングラインによって摺動が阻害されなくなり、動作性の低下をより確実に抑制することができる。   Also, for example, when the valve shaft holder 30 is made of a molded product such as resin, the position of the weld line or parting line formed at the time of molding is matched with the position of the longitudinal groove 33t, that is, the valve at the time of molding By forming the longitudinal grooves 33t along the weld line or parting line formed on the female screw portion 33 of the shaft holder 30, the sliding is not impeded by the weld line or parting line, and the decrease in operability is further ensured. Can be suppressed.

例えば、弁軸ホルダ30における可動ストッパ体34の逆側に成形用の樹脂を注入するためのゲートが設けられる場合、前述のように、可動ストッパ体34の内側(より具体的には、可動ストッパ体34の周方向の一端面34aの内側)に縦貫溝33tを設けることにより、前記弁軸ホルダ30の雌ねじ部33には、成形時に形成されるウェルドラインやパーティングラインが存在しなくなるので、前記したように、動作性の低下をより確実に抑制することができる。   For example, when a gate for injecting a molding resin is provided on the opposite side of the movable stopper body 34 in the valve shaft holder 30, as described above, the inside of the movable stopper body 34 (more specifically, the movable stopper By providing the longitudinal through groove 33t on the inner side of one end face 34a in the circumferential direction of the body 34, there is no weld line or parting line formed at the time of molding in the female screw portion 33 of the valve shaft holder 30, As described above, the decrease in operability can be suppressed more reliably.

[第2実施形態]
図5は、本発明に係る電動弁の第2実施形態を示す縦断面図である。
Second Embodiment
FIG. 5 is a longitudinal sectional view showing a second embodiment of the motor-operated valve according to the present invention.

本第2実施形態の電動弁2は、上記第1実施形態の電動弁1に対し、主に、縦貫溝33tの形状が相違しており、その他の構成は略同じである。したがって、第1実施形態の各部に対応する部分には共通の符号を付して重複説明を省略し、以下では、相違点を重点的に説明する。   The motor-operated valve 2 of the second embodiment is mainly different from the motor-operated valve 1 of the first embodiment in the shape of the longitudinal groove 33t, and the other configuration is substantially the same. Therefore, the parts corresponding to the respective parts of the first embodiment are given the same reference numerals, and the redundant description will be omitted, and in the following, the differences will be mainly described.

本実施形態の電動弁2では、図5とともに図6及び図7を参照すればよく分かるように、前記縦貫溝33t(言い換えれば、凹状面)が、雌ねじ部33の上側まで延設され、弁軸ホルダ30の円筒部31の内周(内壁面)の軸線O方向(昇降方向)全長に亘って形成されている。   In the motor-operated valve 2 of the present embodiment, the longitudinal groove 33t (in other words, a concave surface) is extended to the upper side of the female screw portion 33, as will be understood well with reference to FIGS. The inner circumference (inner wall surface) of the cylindrical portion 31 of the shaft holder 30 is formed over the entire length in the direction of the axis O (in the elevating direction).

このように、本実施形態の電動弁2では、前記縦貫溝33tが、弁軸ホルダ30の円筒部31の内周(内壁面)の軸線O方向(昇降方向)全長に亘って延設され、雌ねじ部33の上側でガイドブッシュ20の延設部22の外周に当接(摺接)する部分まで延設されるので、雄ねじ部23と雌ねじ部33との間(ねじ面間)に加えて弁軸ホルダ30の円筒部31とガイドブッシュ20の延設部22との間(摺動面間)に侵入する異物を当該縦貫溝33tから排出しやすくなり、動作性の低下を更に確実に抑制することができる。   Thus, in the motor-operated valve 2 of the present embodiment, the longitudinal through groove 33t is extended over the entire length of the inner periphery (inner wall surface) of the cylindrical portion 31 of the valve shaft holder 30 in the direction of the axis O (raising and lowering direction) Since it is extended to a portion which contacts (slids) the outer periphery of the extending portion 22 of the guide bush 20 on the upper side of the female screw 33, it is added between the male screw 23 and the female screw 33 (between screw surfaces) Foreign matter entering between the cylindrical portion 31 of the valve shaft holder 30 and the extending portion 22 of the guide bush 20 (between sliding surfaces) can be easily discharged from the longitudinal groove 33t, and the decrease in operability can be further reliably suppressed. can do.

また、例えば、前記弁軸ホルダ30が樹脂等の成形品で作製されている場合、成形時に弁軸ホルダ30の内周(内壁面)に形成されるウェルドラインやパーティングラインに沿って縦貫溝33tを形成することにより、ウェルドラインやパーティングラインによって摺動が阻害されなくなり、動作性の低下を更に確実に抑制することができる。   Also, for example, when the valve shaft holder 30 is made of a molded product such as resin, a longitudinal through groove along a weld line or parting line formed on the inner periphery (inner wall surface) of the valve shaft holder 30 at the time of molding. By forming 33 t, the sliding is not inhibited by the weld line or the parting line, and the decrease in operability can be further reliably suppressed.

例えば、弁軸ホルダ30における可動ストッパ体34の逆側に成形用の樹脂を注入するためのゲートが設けられる場合、前述のように、可動ストッパ体34の内側(より具体的には、可動ストッパ体34の周方向の一端面34aの内側)に(軸線O方向全長に亘る)縦貫溝33tを設けることにより、前記弁軸ホルダ30の内周(内壁面)(雌ねじ部33、及び、ガイドブッシュ20の延設部22の外周に当接する部分)には、成形時に形成されるウェルドラインやパーティングラインが存在しなくなるので、前記したように、動作性の低下を更に確実に抑制することができる。   For example, when a gate for injecting a molding resin is provided on the opposite side of the movable stopper body 34 in the valve shaft holder 30, as described above, the inside of the movable stopper body 34 (more specifically, the movable stopper The inner periphery (inner wall surface) of the valve shaft holder 30 (female screw portion 33 and guide bush) is provided by providing a longitudinal groove 33t (across the entire length in the direction of the axis O) in the inner side of one end surface 34a in the circumferential direction of the body 34. 20. Since there is no weld line or parting line formed at the time of molding in the portion abutted to the outer periphery of the extension portion 22 of 20, as described above, it is possible to further surely suppress the decrease in operability. it can.

[第3実施形態]
図8は、本発明に係る電動弁の第3実施形態を示す縦断面図である。
Third Embodiment
FIG. 8 is a longitudinal sectional view showing a third embodiment of the motor-operated valve according to the present invention.

本第3実施形態の電動弁3は、上記第1実施形態の電動弁1に対し、主に、縦貫溝33tの形成位置が相違しており、その他の構成は略同じである。したがって、第1実施形態の各部に対応する部分には共通の符号を付して重複説明を省略し、以下では、相違点を重点的に説明する。   The motor-operated valve 3 of the third embodiment is mainly different from the motor-operated valve 1 of the first embodiment in the formation position of the longitudinal groove 33t, and the other configuration is substantially the same. Therefore, the parts corresponding to the respective parts of the first embodiment are given the same reference numerals, and the redundant description will be omitted, and in the following, the differences will be mainly described.

本実施形態の電動弁3では、弁軸ホルダ30の雌ねじ部33に形成した縦貫溝33tに代えて、図8とともに図9及び図10を参照すればよく分かるように、ガイドブッシュ20の円筒部21の外周に形成された固定ねじ部(雄ねじ部)23に、軸線O方向(昇降方向)全長に亘って延設された凹状面で構成される縦貫溝23tが形成されている。   In the motor-operated valve 3 according to the present embodiment, the cylindrical portion of the guide bush 20 is replaced with the longitudinal groove 33t formed in the female screw portion 33 of the valve shaft holder 30, as shown in FIGS. In a fixed screw portion (male screw portion) 23 formed on the outer periphery of the shaft 21, a longitudinal through groove 23t constituted by a concave surface extending over the entire length in the direction of the axis O (raising and lowering direction) is formed.

このように、本実施形態の電動弁3では、ねじ送り機構28を構成するガイドブッシュ20の雄ねじ部23に、昇降方向(軸線O方向)全長に亘る縦貫溝23tが設けられるので、上記第1実施形態と同様、昇降方向(軸線O方向)全長に亘ってガイドブッシュ20の雄ねじ部23と弁軸ホルダ30の雌ねじ部33とが噛み合っていない部分(ねじ面同士が接していない部分)である前記縦貫溝23tを通って(キャン55内の)流体(冷媒)がスムーズに流れるようになり、雄ねじ部23と雌ねじ部33との間(ねじ面間)に侵入する異物を当該縦貫溝23tを介して積極的に排出できるため、噛み込みのリスクを低減して、動作性の低下を抑制することができる。   As described above, in the motor-operated valve 3 of the present embodiment, since the longitudinal through groove 23t is provided in the male screw portion 23 of the guide bush 20 constituting the screw feeding mechanism 28 over the entire length in the elevating direction (axial line O direction) As in the embodiment, the male screw portion 23 of the guide bush 20 and the female screw portion 33 of the valve shaft holder 30 do not mesh over the entire length in the raising and lowering direction (axial line O direction) (the screw surfaces are not in contact). The fluid (refrigerant) flows smoothly (in the can 55) through the longitudinal groove 23t, and foreign matter entering between the male screw portion 23 and the female screw portion 33 (between screw surfaces) is made into the longitudinal groove 23t. Since it can be discharged positively, the risk of biting can be reduced and the decline in operability can be suppressed.

また、仮にガイドブッシュ20の雄ねじ部23と弁軸ホルダ30の雌ねじ部33との間(ねじ面間)に異物を噛み込んだ場合でも、雄ねじ部23と雌ねじ部33との相対回転によって異物が移動せしめられ、雄ねじ部23と雌ねじ部33とが噛み合っていない前記縦貫溝23tから前記異物が排出されるため、動作性の低下を確実に抑制することができる。   Further, even if foreign matter is bitten between the male screw 23 of the guide bush 20 and the female screw 33 of the valve shaft holder 30 (between screw surfaces), the foreign material is caused by relative rotation between the male screw 23 and the female screw 33. Since the foreign matter is discharged from the longitudinal groove 23t which is moved and the male screw portion 23 and the female screw portion 33 are not engaged with each other, it is possible to reliably suppress the deterioration of the operability.

また、例えば、前記ガイドブッシュ20が樹脂等の成形品で作製されている場合、成形時に形成されるウェルドラインやパーティングラインの位置と縦貫溝23tの位置とを合わせる、すなわち、成形時にガイドブッシュ20の雄ねじ部23に形成されるウェルドラインやパーティングラインに沿って縦貫溝23tを形成することにより、前記ガイドブッシュ20の雄ねじ部23には、成形時に形成されるウェルドラインやパーティングラインが存在しなくなるので、ウェルドラインやパーティングラインによって摺動が阻害されなくなり、動作性の低下をより確実に抑制することができる。   Also, for example, when the guide bush 20 is made of a molded product such as resin, the position of the weld line or parting line formed at the time of molding is matched with the position of the longitudinal groove 23t, that is, the guide bush at the time of molding By forming longitudinal grooves 23t along weld lines and parting lines formed on the 20 male screw parts 23, weld lines and parting lines formed at the time of molding are formed on the male screw parts 23 of the guide bush 20. Since it does not exist, the sliding is not inhibited by the weld line or the parting line, and the decrease in operability can be more reliably suppressed.

[第4実施形態]
図11は、本発明に係る電動弁の第2実施形態を示す縦断面図である。
Fourth Embodiment
FIG. 11 is a longitudinal sectional view showing a second embodiment of the motor-operated valve according to the present invention.

本第4実施形態の電動弁4は、上記第3実施形態の電動弁3に対し、主に、縦貫溝23tの形状が相違しており、その他の構成は略同じである。したがって、第3実施形態の各部に対応する部分には共通の符号を付して重複説明を省略し、以下では、相違点を重点的に説明する。   The motor-operated valve 4 of the fourth embodiment is mainly different from the motor-operated valve 3 of the third embodiment in the shape of the longitudinal groove 23t, and the other configuration is substantially the same. Therefore, parts corresponding to the respective parts of the third embodiment are given the same reference numerals, duplicate explanations are omitted, and in the following, differences will be mainly described.

本実施形態の電動弁4では、図11とともに図12及び図13を参照すればよく分かるように、前記縦貫溝23tが、ガイドブッシュ20の外周に形成された雄ねじ部23に設けられたDカット面で構成されるとともに、この縦貫溝23t(言い換えれば、Dカット面)が、雄ねじ部23の上側(延設部22側)まで延設され、ガイドブッシュ20の円筒部21及び延設部22の外周(外壁面)の軸線O方向(昇降方向)全長に亘って形成されている。本例では、前記縦貫溝23tは、軸線Oに対して反対側に(言い換えれば、ガイドブッシュ20の軸線Oに対して対称となる位置に)2個設けられている。   In the motor-operated valve 4 of the present embodiment, as is clearly understood by referring to FIGS. 12 and 13 together with FIG. 11, a D-cut in which the longitudinal groove 23t is provided on the male screw 23 formed on the outer periphery of the guide bush 20. The longitudinal groove 23t (in other words, a D-cut surface) is extended to the upper side (the extending portion 22 side) of the male screw portion 23, and the cylindrical portion 21 and the extending portion 22 of the guide bush 20 are formed. Is formed over the entire length in the direction of the axis O (the elevating direction) of the outer periphery (outer wall surface) of In the present embodiment, two vertical penetration grooves 23t are provided on the opposite side to the axis O (in other words, at positions symmetrical with respect to the axis O of the guide bush 20).

このように、本実施形態の電動弁4では、前記縦貫溝23tが、ガイドブッシュ20の円筒部21及び延設部22の外周(外壁面)の軸線O方向(昇降方向)全長に亘って延設され、雄ねじ部23の上側で弁軸ホルダ30の円筒部31の内周に当接(摺接)する部分まで延設されるので、上記第3実施形態に加えて上記第2実施形態と同様の作用効果が得られることは当然である。   Thus, in the motor operated valve 4 of the present embodiment, the longitudinal groove 23t extends over the entire length in the direction of the axis O (raising and lowering direction) of the outer circumference (outer wall surface) of the cylindrical portion 21 and the extending portion 22 of the guide bush 20 In addition to the third embodiment, the second embodiment is added to the third embodiment and is provided so as to extend to a portion that contacts (slids with) the inner periphery of the cylindrical portion 31 of the valve shaft holder 30 above the male screw portion 23. It is natural that the same effect can be obtained.

なお、上記実施形態では、ガイドブッシュ20(の外周)に形成された雄ねじ部(固定ねじ部)23と弁軸ホルダ30(の内周)に形成された雌ねじ部(可動ねじ部)33とで、弁体14を弁座46aに対して昇降させるためのねじ送り機構28を構成しているが、固定ねじ部側を雌ねじ部、可動ねじ部側を雄ねじ部としてもよいことは勿論である(例えば、上記特許文献2参照)。   In the above embodiment, the male screw portion (fixed screw portion) 23 formed on (the outer periphery of) the guide bush 20 and the female screw portion (movable screw portion) 33 formed on (the inner periphery of the valve shaft holder 30) Although the screw feed mechanism 28 for raising and lowering the valve body 14 with respect to the valve seat 46a is configured, it is a matter of course that the fixed screw portion side may be a female screw portion and the movable screw portion side may be a male screw portion See, for example, Patent Document 2 above).

また、上記第1、2実施形態では、弁軸ホルダ30(の内周)に形成された雌ねじ部(可動ねじ部)32に縦貫溝33tを形成し、上記第3実施形態では、ガイドブッシュ20(の外周)に形成された雄ねじ部(固定ねじ部)23に縦貫溝23tを形成しているが、弁軸10の昇降運動を阻害しなければ、雌ねじ部(可動ねじ部)と雄ねじ部(固定ねじ部)の双方に縦貫溝を形成してもよいことは詳述するまでも無い。   Further, in the first and second embodiments, the longitudinal through groove 33t is formed in the female screw portion (movable screw portion) 32 formed in (the inner periphery of) the valve shaft holder 30. In the third embodiment, the guide bush 20 is formed. Although the vertical through groove 23t is formed in the male screw portion (fixed screw portion) 23 formed on (the outer periphery of), the female screw portion (movable screw portion) and the male screw portion It is needless to say that the longitudinal grooves may be formed on both of the fixing screw portions).

また、上記実施形態では、ねじ送り機構28を構成する雄ねじ部23や雌ねじ部33を持つガイドブッシュ20や弁軸ホルダ30をPPS等の樹脂製としているが、例えばSUSや真鍮等の金属製としてもよいことは勿論である。   In the above embodiment, the guide bush 20 having the male screw 23 and the female screw 33 constituting the screw feed mechanism 28 and the valve shaft holder 30 are made of resin such as PPS, but for example, they are made of metal such as SUS or brass. Of course it is also good.

また、上記実施形態では、弁体14が最下降位置(通常なら全閉状態となる)にあるときに、弁体14と弁座46aとの間に所定の大きさの間隙が形成される(すなわち、弁体14が弁座46aに着座しない)閉弁レスタイプの電動弁について説明したが、例えば、弁体が弁座に着座するタイプの電動弁においても、前記と同様の作用効果が得られることは詳述するまでも無い。   Further, in the above embodiment, when the valve body 14 is in the lowermost position (which is normally fully closed), a gap of a predetermined size is formed between the valve body 14 and the valve seat 46 a ( That is, although the valve-less type motor-operated valve in which the valve body 14 is not seated on the valve seat 46a has been described, for example, in the motor-operated valve in which the valve body is seated on the valve seat There is no need to go into detail.

1 電動弁(第1実施形態)
2 電動弁(第2実施形態)
3 電動弁(第3実施形態)
4 電動弁(第4実施形態)
10 弁軸
14 弁体
20 ガイドブッシュ
21 円筒部
22 延設部
23 固定ねじ部(雄ねじ部)
23t 縦貫溝(第3、第4実施形態)
24 固定ストッパ体
25 下部ストッパ
28 ねじ送り機構
29 下部ストッパ機構
30 弁軸ホルダ
31 円筒部
32 天井部
33 可動ねじ部(雌ねじ部)
33t 縦貫溝(第1、第2実施形態)
34 可動ストッパ体
35 凸部
40 弁本体
40a 弁室
41 第1開口
41a 第1導管
42 第2開口
42a 第2導管
43 挿通穴
44 嵌合穴
45 底部壁
46 弁口
46a 弁座
47 鍔状板
48 ストッパ押さえ
50 ステッピングモータ
51 ロータ
52 ステータ
55 キャン
60 圧縮コイルばね
70 固定部材
71 固定部
72 フランジ部
O 軸線
1 Motor-operated valve (first embodiment)
2 Motor-operated valve (second embodiment)
3 Motor-operated valve (third embodiment)
4 Motor-operated valve (fourth embodiment)
DESCRIPTION OF SYMBOLS 10 Valve shaft 14 Valve body 20 Guide bush 21 Cylindrical part 22 Extension part 23 Fixing screw part (male screw part)
23t vertical penetration groove (third and fourth embodiment)
24 fixed stopper body 25 lower stopper 28 screw feeding mechanism 29 lower stopper mechanism 30 valve shaft holder 31 cylindrical portion 32 ceiling portion 33 movable screw portion (female screw portion)
33t Longitudinal penetration groove (first and second embodiments)
34 movable stopper 35 convex part 40 valve main body 40a valve chamber 41 first opening 41a first conduit 42 second opening 42a second conduit 43 insertion hole 44 fitting hole 45 bottom wall 46 valve opening 46a valve seat 47 hooked plate 48 Stopper holder 50 Stepping motor 51 Rotor 52 Stator 55 Can 60 Compression coil spring 70 Fixing member 71 Fixing part 72 Flange part O Axis line

Claims (6)

弁体が設けられた弁軸と、
該弁軸が軸線方向に相対移動可能及び相対回転可能に内挿されるガイドブッシュと、
前記弁体が接離する弁座付きの弁口を有するとともに前記ガイドブッシュが設けられた弁本体と、
前記弁軸に連結される弁軸ホルダと、
前記弁本体に固定されたキャンと、
前記弁軸ホルダを前記ガイドブッシュに対して回転させるための、前記弁軸ホルダに連結されたロータ及びステータを有するモータと、
前記ロータの回転駆動に応じて前記弁軸の前記弁体を前記弁本体の前記弁座に対して昇降させるための、前記ガイドブッシュと前記弁軸ホルダとの間に設けられた雄ねじ部及び雌ねじ部を有するねじ送り機構と、を備える電動弁であって、
前記雄ねじ部又は前記雌ねじ部の少なくとも一方に、昇降方向全長に亘る縦貫溝が設けられていることを特徴とする電動弁。
A valve stem provided with a valve body,
A guide bush in which the valve shaft is axially relatively movable and relatively rotatably inserted;
A valve body having a valve port with a valve seat to which the valve body contacts and separates and provided with the guide bush;
A valve stem holder connected to the valve stem;
A can fixed to the valve body,
A motor having a rotor and a stator coupled to the valve stem holder for rotating the valve stem holder relative to the guide bush;
An external thread portion and an internal thread provided between the guide bush and the valve shaft holder for raising and lowering the valve body of the valve shaft with respect to the valve seat of the valve body according to the rotational drive of the rotor A screw feed mechanism having a head portion,
A motor-operated valve characterized in that a longitudinal through groove extending in the vertical direction is provided in at least one of the male screw portion and the female screw portion.
前記縦貫溝は、前記雄ねじ部又は前記雌ねじ部が設けられた前記ガイドブッシュ又は前記弁軸ホルダの壁面の昇降方向全長に亘って延設されていることを特徴とする請求項1に記載の電動弁。   The electric motor according to claim 1, wherein the vertical through groove is extended over the entire length in the elevating direction of the wall surface of the guide bush or the valve stem holder provided with the male screw portion or the female screw portion. valve. 前記縦貫溝は、前記雌ねじ部に設けられた凹状面で構成されていることを特徴とする請求項1又は2に記載の電動弁。   The motor-operated valve according to claim 1 or 2, wherein the vertical through groove is constituted by a concave surface provided in the female screw portion. 前記縦貫溝は、前記雄ねじ部に設けられた凹状面もしくはDカット面で構成されていることを特徴とする請求項1から3のいずれか一項に記載の電動弁。   The motor-operated valve according to any one of claims 1 to 3, wherein the longitudinal groove is constituted by a concave surface or a D-cut surface provided in the male screw portion. 前記縦貫溝は、前記雄ねじ部又は前記雌ねじ部のパーティングライン或いはウェルドラインに沿って形成されていることを特徴とする請求項1から4のいずれか一項に記載の電動弁。   The motor-operated valve according to any one of claims 1 to 4, wherein the longitudinal groove is formed along a parting line or a weld line of the male screw part or the female screw part. 弁体が設けられた弁軸と、
該弁軸が内挿されるガイドブッシュと、
前記弁体が接離する弁座付きの弁口を有するとともに前記ガイドブッシュが設けられた弁本体と、
前記弁本体に設けられたキャンと、
前記弁軸を前記ガイドブッシュに対して回転させるためのロータ及びステータを有するモータと、
前記ロータの回転駆動に応じて前記弁軸の前記弁体を前記弁本体の前記弁座に対して昇降させるための、雄ねじ部及び雌ねじ部を有するねじ送り機構と、を備える電動弁であって、
前記雄ねじ部又は前記雌ねじ部の少なくとも一方に、昇降方向全長に亘る縦貫溝が設けられていることを特徴とする電動弁。
A valve stem provided with a valve body,
A guide bush into which the valve stem is inserted;
A valve body having a valve port with a valve seat to which the valve body contacts and separates and provided with the guide bush;
A can provided on the valve body,
A motor having a rotor and a stator for rotating the valve shaft relative to the guide bush;
And a screw feed mechanism having an external thread portion and an internal thread portion for raising and lowering the valve body of the valve shaft relative to the valve seat of the valve body in accordance with rotational driving of the rotor. ,
A motor-operated valve characterized in that a longitudinal through groove extending in the vertical direction is provided in at least one of the male screw portion and the female screw portion.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4008941A4 (en) * 2020-08-18 2022-11-30 Pacific Industrial Co., Ltd. MOTORIZED VALVE

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JP7453091B2 (en) * 2020-08-18 2024-03-19 株式会社鷺宮製作所 Electric valve and refrigeration cycle system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6173818U (en) * 1984-10-18 1986-05-19
JPS6280009U (en) * 1985-11-09 1987-05-22
JP2003097666A (en) * 2001-09-27 2003-04-03 Fujitsu Ltd Screw shaft and drive mechanism provided with this screw shaft
JP2007308909A (en) * 2006-05-17 2007-11-29 Matsushita Electric Works Ltd Flexible drain for eaves gutter
JP2011208716A (en) * 2010-03-30 2011-10-20 Fuji Koki Corp Electric valve
JP2016079994A (en) * 2014-10-09 2016-05-16 千住金属工業株式会社 Soldering device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6173818U (en) * 1984-10-18 1986-05-19
JPS6280009U (en) * 1985-11-09 1987-05-22
JP2003097666A (en) * 2001-09-27 2003-04-03 Fujitsu Ltd Screw shaft and drive mechanism provided with this screw shaft
JP2007308909A (en) * 2006-05-17 2007-11-29 Matsushita Electric Works Ltd Flexible drain for eaves gutter
JP2011208716A (en) * 2010-03-30 2011-10-20 Fuji Koki Corp Electric valve
JP2016079994A (en) * 2014-10-09 2016-05-16 千住金属工業株式会社 Soldering device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4008941A4 (en) * 2020-08-18 2022-11-30 Pacific Industrial Co., Ltd. MOTORIZED VALVE

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