JP5681396B2 - Motorized valve - Google Patents

Motorized valve Download PDF

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JP5681396B2
JP5681396B2 JP2010147110A JP2010147110A JP5681396B2 JP 5681396 B2 JP5681396 B2 JP 5681396B2 JP 2010147110 A JP2010147110 A JP 2010147110A JP 2010147110 A JP2010147110 A JP 2010147110A JP 5681396 B2 JP5681396 B2 JP 5681396B2
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valve
stopper
male screw
side stopper
forming portion
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JP2012013095A (en
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共存 大内
共存 大内
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Fujikoki Corp
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Fujikoki Corp
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Priority to JP2010147110A priority Critical patent/JP5681396B2/en
Priority to KR1020110015787A priority patent/KR101772700B1/en
Priority to CN201110134084.4A priority patent/CN102313061B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
    • F16K31/043—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means

Description

本発明は、冷凍サイクルシステムにおける冷媒の流量制御等に使用される電動弁に関する。   The present invention relates to a motor-operated valve used for refrigerant flow control in a refrigeration cycle system.

従来、上記電動弁として、例えば、特許文献１には、図４に示すように、弁室１５１に連通する第１流路１５２及び第２流路１５３を有し、第２流路１５３の弁室連通部に弁シート１５４を設けた弁本体１５５と、弁本体１５５のシート弁座１５６に接離する棒状のニードル弁１５７と、円筒状の密閉ケース１５９と、密閉ケース１５９の外側に配置されるステータコイル１６７と、密閉ケース１５９の内側にステータコイル１６７の通電励磁によって回転して弁開閉方向に移動可能で、筒状のスリーブ１６２及び該スリーブ１６２の外側に止環１６６で固定された筒状の永久磁石１６３を有するロータ１６４と、ロータ１６４の回転によるねじ送り作用でニードル弁１５７を開閉作動させる雄ねじ管１６１とを備え、密閉ケース１５９の下蓋１６０が弁本体１５５に溶接固定された電動弁１５０が提案されている。   Conventionally, as the electric valve, for example, Patent Document 1 has a first flow path 152 and a second flow path 153 communicating with a valve chamber 151 as shown in FIG. A valve body 155 provided with a valve seat 154 at the chamber communication portion, a rod-shaped needle valve 157 that contacts and separates from the seat valve seat 156 of the valve body 155, a cylindrical sealing case 159, and an outer side of the sealing case 159 A stator coil 167 and a cylindrical sleeve 162 that can be rotated in the valve opening and closing direction by energization excitation of the stator coil 167 inside the sealed case 159 and that is fixed to the outside of the sleeve 162 by a retaining ring 166. And a male screw pipe 161 that opens and closes the needle valve 157 by a screw feeding action by the rotation of the rotor 164. 160 has been proposed an electric valve 150 that is welded to the valve body 155.

この電動弁１５０には、図４及び図５（ａ）に示すように、スリーブ１６２の下端部に閉弁規制ストッパ１６２ａが突設され、図４及び図６に示すように、フランジ体１５８に全閉ストッパ１５８ａが突設され、ニードル弁１５７の閉弁時に、閉弁規制ストッパ１６２ａが全閉ストッパ１５８ａに、図４に示すようにその回転方向に当接することにより、閉弁時においてロータ１６４がさらに下降することを規制する。   As shown in FIGS. 4 and 5A, the motor-operated valve 150 is provided with a valve closing restriction stopper 162a at the lower end of the sleeve 162, and as shown in FIGS. A fully closed stopper 158a is provided so that when the needle valve 157 is closed, the valve closing restricting stopper 162a contacts the fully closed stopper 158a in the rotational direction as shown in FIG. Regulates further down.

上記ロータ１６４の下降規制を行う際には、図５（ａ）に示すブッシュ１６８の下端１６８ｃから閉弁規制ストッパ１６２ａの下端までの寸法ｈ１が雌ねじ１６８ａのピッチの整数倍になるように、また、図６（ｂ）に示す雄ねじ管１６１の上端から全閉ストッパ１５８ａの上端までの寸法ｈ２を、雄ねじ１６１ａのピッチの整数倍＋ピッチ／２になるように設定し、閉弁規制ストッパ１６２ａと全閉ストッパ１５８ａとの当接量をねじピッチ／２に調整する。   When the lowering of the rotor 164 is restricted, the dimension h1 from the lower end 168c of the bush 168 shown in FIG. 5A to the lower end of the valve closing restriction stopper 162a is an integral multiple of the pitch of the female screw 168a. 6B, the dimension h2 from the upper end of the male screw pipe 161 to the upper end of the fully closed stopper 158a shown in FIG. 6B is set to be an integral multiple of the pitch of the male screw 161a + pitch / 2, and the valve closing restriction stopper 162a The amount of contact with the fully closed stopper 158a is adjusted to the screw pitch / 2.

そして、上記電動弁１５０のロータ送りねじ１７０を製造する際には、図６に示すように、フランジ体１５８の成形キャビティ１８２を画定する金型装置１８０を用い、下型１８１に、全閉ストッパ１５８ａの成形凹部１８１ａと、成形キャビティ１８２の中心部に開口する内底面にキー突条１８１ｂを有したブッシュ取付穴１８１ｃとが設けられ、この下型１８１のブッシュ取付穴１８１ｃに、雄ねじ管１６１を内側にねじ込み固定した有底筒状のセットブッシュ１８３を、雄ねじ１６１ａのねじ切り始端部１６１ｂが成形凹部１８１ａと位置対応するように、キー突条１８１ｂとキー溝１８３ａ（セットブッシュ１８３の下端部に設けられている）の係合で位置決めし、かつ雄ねじ管１６１の基端取付部１６１ｃが下型１８１の上方に突出する状態に取り付ける。そして、金型装置１８０を型閉じし、成形キャビティ１８２に溶融樹脂を射出注入し、雄ねじ管１６１とフランジ体１５８とが一体化された図６（ｂ）、（ｃ）に示すようなロータ送りねじ１７０を製造していた。   When the rotor feed screw 170 of the electric valve 150 is manufactured, as shown in FIG. 6, a mold device 180 that defines a molding cavity 182 of the flange body 158 is used, and the fully closed stopper is attached to the lower die 181. A molding recess 181a of 158a and a bush mounting hole 181c having a key protrusion 181b on the inner bottom surface opened at the center of the molding cavity 182 are provided. A male threaded pipe 161 is inserted into the bush mounting hole 181c of the lower mold 181. A bottomed cylindrical set bush 183 that is screwed inwardly is provided on the key ridge 181b and the key groove 183a (on the lower end of the set bush 183 so that the threading start end portion 161b of the male screw 161a corresponds to the molding recess portion 181a. And the base end mounting portion 161c of the male screw tube 161 protrudes above the lower mold 181. Attached to the state to be. Then, the mold device 180 is closed, molten resin is injected and injected into the molding cavity 182, and the male screw pipe 161 and the flange body 158 are integrated into a rotor feed as shown in FIGS. 6 (b) and 6 (c). Screw 170 was manufactured.

特許第３３１００４２号公報Japanese Patent No. 3310042

上述のように、従来は、全閉ストッパ１５８ａを有するロータ送りねじ１７０を製造するにあたって、セットブッシュ１８３を用意して雄ねじ管１６１と一体化した後、金型装置１８０を用いて雄ねじ管１６１をインサート成形する必要があるため、製造に手間がかかり、ひいては電動弁１５０の製造コストの増大に繋がるという問題があった。   As described above, conventionally, in manufacturing the rotor feed screw 170 having the fully closed stopper 158a, the set bush 183 is prepared and integrated with the male screw tube 161, and then the male screw tube 161 is mounted using the mold device 180. Since it is necessary to perform the insert molding, there is a problem that the manufacturing takes time and the manufacturing cost of the motor-operated valve 150 is increased.

そこで、本発明は、上記従来の技術における問題点に鑑みてなされたものであって、ストッパを有する上記ロータ送りねじに類似又は相当する組立体を容易に製造することができ、製造コストの低い電動弁を提供することを目的とする。   Therefore, the present invention has been made in view of the problems in the above-described conventional technology, and an assembly similar or equivalent to the above-described rotor feed screw having a stopper can be easily manufactured, and the manufacturing cost is low. An object is to provide an electric valve.

上記目的を達成するため、本発明は、雄ねじ部を有し、電動モータのロータの回転に伴って回転する雄ねじ部材と、該雄ねじ部材に設けられ、弁座と対向するように配置された弁体と、前記雄ねじ部材の回転に伴って回転する可動側ストッパと、弁本体に設けられ、前記雄ねじ部と螺合する雌ねじ部材と、該雌ねじ部材に設けられ、前記可動側ストッパと当接可能な固定側ストッパとを備えた電動弁において、前記雄ねじ部材は、前記雌ねじ部材と螺合する雄ねじ部がそのまま延長されることにより形成された延長雄ねじ形成部を備え、前記可動側ストッパは、前記延長雄ねじ形成部における前記弁座側の端部に螺嵌されるとともに、前記固定側ストッパとは前記雄ねじ部材の回転方向に当接することを特徴とする。 In order to achieve the above-mentioned object, the present invention has a male screw part, a male screw member that rotates as the rotor of the electric motor rotates, and a valve that is provided on the male screw member and is disposed so as to face the valve seat. A body, a movable stopper that rotates with the rotation of the male screw member, a female screw member that is provided on the valve main body and that is screwed with the male screw portion, and is provided on the female screw member and is capable of contacting the movable stopper. In the motor-operated valve provided with a fixed stopper, the male screw member includes an extended male screw forming portion formed by extending a male screw portion screwed with the female screw member as it is , Rutotomoni is screwed to an end portion of the valve seat side definitive extension external thread forming section, said the fixed side stopper characterized in that it abuts against the rotation direction of the externally threaded member.

また上記電動弁において、前記延長雄ねじ形成部は、前記弁座の方向へ形成され、前記可動側ストッパは、全開下ストッパであり、前記固定側ストッパは、全開上ストッパであることを特徴とする。   In the motor-operated valve, the extension male screw forming portion is formed in the direction of the valve seat, the movable side stopper is a fully open stopper, and the fixed side stopper is a fully open stopper. .

さらに上記電動弁において、前記延長雄ねじ形成部は、前記弁座と反対方向へ形成され、前記可動側ストッパは、全閉上ストッパであり、前記固定側ストッパは、全閉下ストッパであることを特徴とする。   Further, in the motor-operated valve, the extension male screw forming portion is formed in a direction opposite to the valve seat, the movable side stopper is a fully closed upper stopper, and the fixed side stopper is a fully closed bottom stopper. Features.

そして、本発明によれば、可動側ストッパの取付を極めて簡単に行うことができ、当該電動弁の構成が簡略化されるとともに、容易にその製造を行うことができ、電動弁の製造コストを大幅に低減することができる。   According to the present invention, the movable side stopper can be attached very easily, the configuration of the motor-operated valve is simplified, and the motor valve can be easily manufactured. It can be greatly reduced.

また上記電動弁において、可動側ストッパは、延長雄ねじ形成部の終端に位置する平面部又は該延長雄ねじ形成部のねじ終端部に当接することにより固定されることを特徴とする。   In the motor-operated valve, the movable side stopper is fixed by contacting a flat surface portion located at the end of the extended male screw forming portion or a screw end portion of the extended male screw forming portion.

このように構成されることにより、可動側ストッパの、当該電動弁に対する取付（固定）を簡単に行うことができる。   With this configuration, the movable side stopper can be easily attached (fixed) to the motor-operated valve.

また、本発明は、雌ねじ部を有し、電動モータのロータの回転に伴って回転する雌ねじ部材と、該雌ねじ部材に設けられ、弁座と対向するように配置された弁体と、前記雌ねじ部材の回転に伴って回転する可動側ストッパと、弁本体に設けられ、前記雌ねじ部と螺合する雄ねじ部材と、該雄ねじ部材に設けられ、前記可動側ストッパと当接可能な固定側ストッパとを備えた電動弁において、前記雄ねじ部材は、前記雌ねじ部材と螺合する雄ねじ部がそのまま延長されることにより形成された延長雄ねじ形成部を備え、前記固定側ストッパは、前記延長雄ねじ形成部における前記弁座側の端部に螺嵌されるとともに、前記可動側ストッパとは前記雌ねじ部材の回転方向に当接することを特徴とする。 The present invention also includes an internal thread member that has an internal thread portion and rotates as the rotor of the electric motor rotates, a valve body that is provided on the internal thread member and is disposed to face the valve seat, and the internal thread A movable-side stopper that rotates as the member rotates, a male screw member that is provided on the valve main body and is screwed with the female screw portion, and a fixed-side stopper that is provided on the male screw member and that can contact the movable-side stopper. The male screw member includes an extended male screw forming portion formed by extending a male screw portion screwed with the female screw member as it is , and the fixed side stopper is connected to the extended male screw forming portion. It is screwed on the end portion of definitive the valve seat side Rutotomoni, wherein the movable side stopper characterized in that it abuts against the rotation direction of the female screw member.

また、上記電動弁において、前記延長雄ねじ形成部は、前記弁座の方向へ形成され、前記可動側ストッパは、全閉上ストッパであり、前記固定側ストッパは、全閉下ストッパであることを特徴とする。   Further, in the motor-operated valve, the extension male screw forming portion is formed in the direction of the valve seat, the movable side stopper is a fully closed upper stopper, and the fixed side stopper is a fully closed bottom stopper. Features.

本発明によれば、固定側ストッパの取付を極めて簡単に行うことができ、また当該電動弁の構成が簡略化されるとともに、容易にその製造を行うことができ、電動弁の製造コストを大幅に低減することができる。   According to the present invention, the fixed-side stopper can be attached very easily, the configuration of the motor-operated valve is simplified, and the motor-driven valve can be easily manufactured, greatly increasing the manufacturing cost of the motor-operated valve. Can be reduced.

また、上記電動弁において、固定側ストッパが、前記延長雄ねじ形成部の終端に位置する平面部又は該延長雄ねじ形成部のねじ終端部に当接することにより固定されることを特徴とする。このような構成により、 固定側ストッパの、当該電動弁に対する取付を簡単に行うことができる。   In the motor-operated valve, the stationary stopper is fixed by contacting a flat portion located at the end of the extension male screw forming portion or a screw end portion of the extension male screw forming portion. With such a configuration, the stationary stopper can be easily attached to the motor-operated valve.

また本発明は、上記各々の電動弁において、可動側ストッパ及び固定側ストッパが、各々に形成される雌ねじのねじ切り始め位置を基準に形成されたことを特徴とする。このように構成されたことにより、各ストッパの当接量を適切に管理、設定することができる。   Further, according to the present invention, in each of the motor-operated valves, the movable side stopper and the fixed side stopper are formed on the basis of the threading start position of the female screw formed in each. With this configuration, it is possible to appropriately manage and set the contact amount of each stopper.

以上のように、本発明によれば、ストッパを有する従来のロータ送りねじに相当する組立体等を容易に製造することができ、製造コストの低い電動弁を提供することができる。   As described above, according to the present invention, an assembly or the like corresponding to a conventional rotor feed screw having a stopper can be easily manufactured, and an electric valve with low manufacturing cost can be provided.

本発明にかかる電動弁の第１の実施形態を示す断面図であって、（ａ）は全閉時、（ｂ）は全開時を示す。It is sectional drawing which shows 1st Embodiment of the motor operated valve concerning this invention, Comprising: (a) shows the time of full closure, (b) shows the time of full open. 本発明にかかる電動弁の第２の実施形態を示す断面図であって、（ａ）は全閉時、（ｂ）は全開時を示す。It is sectional drawing which shows 2nd Embodiment of the motor operated valve concerning this invention, Comprising: (a) shows the time of full closure, (b) shows the time of full open. 本発明にかかる電動弁の第３の実施形態を示す断面図であって、（ａ）は全閉時、（ｂ）は全開時を示す。It is sectional drawing which shows 3rd Embodiment of the motor operated valve concerning this invention, Comprising: (a) is at the time of a full closure, (b) shows the time of a full open. 従来の電動弁の一例を示す断面図である。It is sectional drawing which shows an example of the conventional motor operated valve. 図４の電動弁のロータ中心体を示す図であって、（ａ）は断面図、（ｂ）は底面図である。It is a figure which shows the rotor center body of the electrically operated valve of FIG. 4, Comprising: (a) is sectional drawing, (b) is a bottom view. 図４の電動弁のロータ送りねじ及びその製造方法を説明するための図であって、（ａ）は製造方法を説明するための断面図、（ｂ）は、製造したロータ送りねじを弁本体に取り付けた状態を示す断面図、（ｃ）は（ｂ）に示したロータ送りねじの上面図である。It is a figure for demonstrating the rotor feed screw and its manufacturing method of the motor operated valve of FIG. 4, Comprising: (a) is sectional drawing for demonstrating a manufacturing method, (b) is a valve main body with the manufactured rotor feed screw. Sectional drawing which shows the state attached to (2), (c) is a top view of the rotor feed screw shown in (b).

次に、発明を実施するための形態について図面を参照しながら説明する。   Next, modes for carrying out the invention will be described with reference to the drawings.

図１は、本発明にかかる電動弁の第１の実施形態を示し、図１（ａ）は全閉時、図１（ｂ）は全開時の断面図を示す。   1A and 1B show a first embodiment of a motor-operated valve according to the present invention, in which FIG. 1A shows a cross-sectional view when fully closed, and FIG. 1B shows a cross-sectional view when fully opened.

この電動弁１は、２本の導管２、３と弁座４とを備える弁本体５と、弁本体５に接合されたキャン６と、キャン６の内部に配置され、電動モータの一部を構成するロータ７と、キャン６の外周部に固定され、ロータ７を回転駆動するステータ（不図示）と、支持リング９を介してロータ７に一体に連結された弁軸（雄ねじ部材）１０と、弁本体５に下端部が圧入固定され、弁軸１０が内挿された弁軸ホルダ（雌ねじ部材）１１と、弁軸１０の下端部に係止された弁体１２等で構成される。   The motor-operated valve 1 includes a valve body 5 including two conduits 2 and 3 and a valve seat 4, a can 6 joined to the valve body 5, a can 6, and a part of the electric motor. A rotor 7 that is configured, a stator (not shown) that is fixed to the outer periphery of the can 6 and rotationally drives the rotor 7, and a valve shaft (male screw member) 10 that is integrally connected to the rotor 7 via a support ring 9. The valve body 5 includes a valve shaft holder (female screw member) 11 in which a lower end portion is press-fitted and fixed, and a valve shaft 10 is inserted therein, and a valve body 12 and the like locked to the lower end portion of the valve shaft 10.

弁本体５は、円筒状に形成され、２本の導管２、３によって形成される２つの流路２ａ、３ａに連通する弁室５ａを備える。弁室５ａと流路３ａとの間に弁座４が位置し、弁体１２を弁座４に接離させることで電動弁１が開閉する。   The valve body 5 is formed in a cylindrical shape, and includes a valve chamber 5a communicating with two flow paths 2a and 3a formed by two conduits 2 and 3. The valve seat 4 is located between the valve chamber 5a and the flow path 3a, and the motor-operated valve 1 is opened and closed by bringing the valve body 12 into and out of contact with the valve seat 4.

キャン６は、下部が開口し、上部が閉じた円筒状に形成され、弁本体５の上部に接合される。キャン６の内部には、ロータ７等の主要部品が収容される。   The can 6 is formed in a cylindrical shape having an open bottom and a closed top, and is joined to the top of the valve body 5. Main components such as the rotor 7 are accommodated in the can 6.

ロータ７は、円筒状に形成され、キャン６の内部に回転可能に配置される。このロータ７は、弁軸１０の上部に螺嵌された支持リング９を介して、弁軸１０と一体に連結される。支持リング９には、全閉上ストッパ部（可動側ストッパ）９ａが弁軸ホルダ１１の上面に向かって突出するように一体に形成される。ロータ７と、キャン６の外周部に固定されたステータとで電動モータ（例えばステッピングモータ）が構成され、ステータへの給電によりロータ７が回転する。   The rotor 7 is formed in a cylindrical shape, and is disposed rotatably inside the can 6. The rotor 7 is integrally connected to the valve shaft 10 via a support ring 9 screwed onto the upper portion of the valve shaft 10. The support ring 9 is integrally formed with a fully closed upper stopper portion (movable side stopper) 9 a so as to protrude toward the upper surface of the valve shaft holder 11. An electric motor (for example, a stepping motor) is constituted by the rotor 7 and a stator fixed to the outer peripheral portion of the can 6, and the rotor 7 is rotated by supplying power to the stator.

弁軸１０は、弁軸ホルダ１１の雌ねじ部１１ａと螺合する雄ねじ部１０ａが螺刻されるとともに、下端部１０ｃが下方に向かって開口し、天井部１０ｅを備えるばね収容部１０ｂを形成し、下端部１０ｃには、弁体１２の係止リング１６がかしめ固定される。ばね収容部１０ｂ内には、弁体１２をボール１３を介して下方に付勢する緩衝用のコイルばね１４が縮装される。   The valve shaft 10 has a male threaded portion 10a threadedly engaged with the female threaded portion 11a of the valve shaft holder 11, and a lower end portion 10c that opens downward to form a spring accommodating portion 10b including a ceiling portion 10e. The locking ring 16 of the valve body 12 is caulked and fixed to the lower end portion 10c. In the spring accommodating portion 10b, a buffering coil spring 14 for biasing the valve body 12 downward via the ball 13 is mounted.

弁軸１０に形成された雄ねじ部１０ａに隣接して、さらに弁座４と反対方向に雄ねじ部１０ａの雄ねじがそのまま連続して延長して形成されるように延長雄ねじ形成部１０ｚが設けられている。すなわち、雄ねじ部１０ａは、本来は弁軸ホルダ１１に設けられた雌ねじ部１１ａに螺合する範囲で形成されれば良いが、この実施の形態では、雄ねじ部１０ａをさらにその範囲を弁座４と反対側に向かうようにそのまま延長して、延長雄ねじ形成部１０ｚとして形成している。   An extension male screw forming portion 10z is provided adjacent to the male screw portion 10a formed on the valve shaft 10 so that the male screw of the male screw portion 10a is continuously extended in the opposite direction to the valve seat 4 as it is. Yes. In other words, the male screw portion 10a may be formed in a range that is originally screwed into the female screw portion 11a provided in the valve shaft holder 11, but in this embodiment, the male screw portion 10a is further expanded in its range. It is extended as it is so that it may go to the opposite side, and it forms as the extended male screw formation part 10z.

そして、この延長雄ねじ形成部１０ｚに、全閉上ストッパ部９ａを備えた支持リング９が螺合され、その後、接着、溶接等の適宜の手法により支持リング９が弁軸１０に固着されている。   Then, a support ring 9 having a fully closed upper stopper portion 9a is screwed to the extended male screw forming portion 10z, and then the support ring 9 is fixed to the valve shaft 10 by an appropriate method such as adhesion or welding. .

また弁軸１０に形成された雄ねじ部１０ａに隣接して、さらに弁座４の方向に雄ねじ部１０ａの雄ねじがそのまま連続して延長して形成されるように延長雄ねじ形成部１０ｙが設けられている。すなわち、上述のように、雄ねじ部１０ａは、本来は雌ねじ部１１ａに螺合する範囲で形成されれば良いが（すなわち、雄ねじ部１０ａは、弁体１２を駆動する駆動ねじである）、この実施の形態では、雄ねじ部１０ａをさらにその範囲を弁座４側に向かうようにそのまま連続して延長して、延長雄ねじ形成部１０ｙとして形成している。   Further, an extension male screw forming portion 10y is provided adjacent to the male screw portion 10a formed on the valve shaft 10 so that the male screw of the male screw portion 10a is continuously extended in the direction of the valve seat 4 as it is. Yes. That is, as described above, the male screw portion 10a may be formed in a range that is originally screwed to the female screw portion 11a (that is, the male screw portion 10a is a drive screw that drives the valve body 12). In the embodiment, the male screw portion 10a is further continuously extended as it is so as to extend the range toward the valve seat 4 to form the extended male screw forming portion 10y.

全開下ストッパ１７（可動側ストッパ）は、その雌ねじ部１７ｂを弁軸１０の端部（延長雄ねじ形成部１０ｚ）にねじ込み、雄ねじ部１０ａを経由して延長雄ねじ形成部１０ｙに至り、天井部１０ｅに当接させることにより固定される。この全開下ストッパ１７は、延長雄ねじ形成部１０ｙに螺合し天井部１０ｅに当接するのみで、弁軸１０に対して特に接着、溶接等による固着は不要である。すなわち、当該電動弁の使用により全開下ストッパ１７の螺合が仮に緩くなっても、その閉弁方向の動作により、全開下ストッパ部１７ａが全開上ストッパ部１１ｆに当接し、該全開下ストッパ部１７ａは天井部１０ｅ方向に回動され、弁軸１０に対して再度堅固に固定される。もちろん、上記の固着を行うようにしても良い。   The fully open stopper 17 (movable stopper) has its female threaded portion 17b screwed into the end of the valve shaft 10 (extended male screw forming portion 10z), reaches the extended male screw forming portion 10y via the male screw portion 10a, and reaches the ceiling portion 10e. It is fixed by making it contact. The fully open stopper 17 is only screwed into the extension male screw forming portion 10y and abutted against the ceiling portion 10e, and is not particularly required to be fixed to the valve shaft 10 by adhesion, welding or the like. That is, even if the screwing of the fully open stopper 17 is loosened by using the electric valve, the fully open stopper portion 17a abuts on the fully open stopper portion 11f by the operation in the valve closing direction, and the fully open stopper portion 17a is rotated in the direction of the ceiling portion 10e and is firmly fixed to the valve shaft 10 again. Of course, the above fixing may be performed.

尚、延長雄ねじ形成部１０ｚの雄ねじの形成を天井部１０ｅの手前までとし、その雄ねじの切り終わりの部分にて全開下ストッパ１７を当接固定するようにしても良い。   Alternatively, the male screw of the extended male screw forming portion 10z may be formed up to the front of the ceiling portion 10e, and the fully open stopper 17 may be abutted and fixed at the end of the male screw cutting.

弁軸ホルダ１１は、上部に雌ねじ部１１ａが螺刻されるとともに、弁軸ホルダ１１の下部には、ばね収容部１０ｂの外周に配在され、下端部１１ｃが下方に向かって開口し、天井部１１ｅを備える筒状の嵌挿部１１ｂを備える。嵌挿部１１ｂの下端部１１ｃは、弁本体５の連結保持部５ｂに一体成形されている。そして、弁軸ホルダ１１の雌ねじ部１１ａと弁軸１０の雄ねじ部１０ａとが螺合し、弁軸ホルダ１１の内部を弁軸１０が上下方向に案内される。また、弁軸ホルダ１１の上面には、全閉下ストッパ部（固定側ストッパ）１１ｄが設けられ、天井部１１ｅのばね収容部１０ｂ側の面には、全開上ストッパ部（固定側ストッパ）１１ｆが設けられる。弁軸ホルダ１１の側面には、弁室５ａとキャン６の内部との均圧を図る均圧孔１５が穿設される。   The valve shaft holder 11 has a female threaded portion 11a threaded on the upper portion thereof, and is disposed on the outer periphery of the spring accommodating portion 10b at the lower portion of the valve shaft holder 11, with the lower end portion 11c opening downward, and the ceiling. A cylindrical fitting insertion portion 11b including a portion 11e is provided. A lower end portion 11 c of the fitting insertion portion 11 b is integrally formed with the connection holding portion 5 b of the valve body 5. Then, the female screw portion 11a of the valve shaft holder 11 and the male screw portion 10a of the valve shaft 10 are screwed together, and the valve shaft 10 is guided in the vertical direction inside the valve shaft holder 11. Further, a fully closed stopper portion (fixed side stopper) 11d is provided on the upper surface of the valve shaft holder 11, and a fully open stopper portion (fixed side stopper) 11f is provided on the surface of the ceiling portion 11e on the spring accommodating portion 10b side. Is provided. A pressure equalizing hole 15 is formed in the side surface of the valve shaft holder 11 to equalize the pressure between the valve chamber 5 a and the inside of the can 6.

ここで、全開下ストッパ１７、弁軸ホルダ１１及び支持リング９の３つの部品は、共通の雄ねじ（延長雄ねじ形成部１０ｙ、雄ねじ部１０ａ及び延長雄ねじ形成部１０ｚ）に螺合しているので、該全開下ストッパ１７、弁軸ホルダ１１及び支持リング９の各々に形成される雌ねじの切り始め位置を基準に各々のストッパ（全開下ストッパ部１７ａ、全開上ストッパ部１１ｆ、全閉下ストッパ部１１ｄ及び全閉上ストッパ部９ａ）の形成位置（雌ねじの切り始め位置からの回転方向における各ストッパ部の形成位置）及び高さを決定すれば、各々のストッパ部の当接量（当接高さ）を適切に設定することができる。   Here, the three parts of the fully open stopper 17, the valve shaft holder 11 and the support ring 9 are screwed into a common male screw (extended male screw forming portion 10y, male screw portion 10a and extended male screw forming portion 10z). The respective stoppers (fully opened stopper portion 17a, fully opened stopper portion 11f, fully closed stopper portion 11d) are based on the starting positions of female threads formed on the fully opened stopper 17, the valve shaft holder 11 and the support ring 9, respectively. When the formation position (formation position of each stopper part in the rotation direction from the start position of female thread) and the height are determined, the contact amount (contact height) of each stopper part is determined. ) Can be set appropriately.

弁体１２は、下部に円錐状部分を有し、全体的に円柱状に形成される。弁体１２の上部１２ａは、弁軸１０のばね収容部１０ｂに内挿されるとともに、弁軸１０の係止リング１６により抜け止め係止される。   The valve body 12 has a conical portion at the lower portion, and is formed in a cylindrical shape as a whole. The upper portion 12 a of the valve body 12 is inserted into the spring accommodating portion 10 b of the valve shaft 10 and is prevented from coming off by the locking ring 16 of the valve shaft 10.

次に、上記構成を有する電動弁１の動作について、図１を参照しながら説明する。   Next, the operation of the motor-operated valve 1 having the above configuration will be described with reference to FIG.

電動弁１を閉じる場合には、例えば図１（ｂ）の状態で、ステータに一方向の通電を行い励磁すると、ロータ７が上面視時計方向に回転すると同時に弁軸１０も回転下降し、弁体１２が弁座４に着座して電動弁１が閉弁する。   When the motor-operated valve 1 is closed, for example, in the state shown in FIG. 1B, when the stator is energized in one direction and excited, the rotor 7 rotates in the clockwise direction as viewed from above, and the valve shaft 10 also rotates and descends. The body 12 is seated on the valve seat 4 and the motor-operated valve 1 is closed.

弁体１２が弁座４に着座した時点では、全閉上ストッパ部９ａが全閉下ストッパ部１１ｄまで到達せず、ロータ７がさらに回転可能な状態にある。ロータ７がさらに上面視時計方向に回転し、全閉上ストッパ部９ａが全閉下ストッパ部１１ｄに当接すると、ロータ７の回転が強制的に停止される。   When the valve body 12 is seated on the valve seat 4, the fully closed upper stopper portion 9a does not reach the fully closed lower stopper portion 11d, and the rotor 7 is further rotatable. When the rotor 7 further rotates in the clockwise direction as viewed from above and the fully closed stopper portion 9a contacts the fully closed stopper portion 11d, the rotation of the rotor 7 is forcibly stopped.

また、弁体１２が弁座４に着座すると、弁体１２の移動は停止するが、弁軸１０はさらに下降するため、コイルばね１４が圧縮されて弁体１２を弁座４に押圧し、図１（ａ）に示す姿勢で動作が終了する。   When the valve body 12 is seated on the valve seat 4, the movement of the valve body 12 stops, but the valve shaft 10 is further lowered, so that the coil spring 14 is compressed and presses the valve body 12 against the valve seat 4, The operation ends in the posture shown in FIG.

一方、電動弁１を開く場合には、例えば図１（ａ）の状態で、ステータに上記とは逆方向の通電を行い励磁すると、ロータ７が上面視反時計方向に回転し、弁軸１０が上昇し、弁体１２が弁座４から離れて電動弁１が開弁する。そして、ロータ７がさらに回転し、全開下ストッパ部１７ａが全開上ストッパ部１１ｆに当接すると、ロータ７の回転が停止し、弁体１２の上昇も停止する。   On the other hand, when the motor-operated valve 1 is opened, for example, in the state of FIG. 1A, when the stator is energized by energizing in the opposite direction to the above, the rotor 7 rotates counterclockwise as viewed from above, and the valve shaft 10 Rises, the valve body 12 moves away from the valve seat 4, and the motor-operated valve 1 opens. When the rotor 7 further rotates and the fully open lower stopper portion 17a comes into contact with the fully opened upper stopper portion 11f, the rotation of the rotor 7 stops and the valve body 12 also stops rising.

以上のように、弁軸ホルダ１１に形成された雌ねじ部１１ａに螺合するために弁軸１０に雄ねじ部１０ａが形成されているが、この雄ねじ部１０ａをさらにそのまま延長して形成し、その延長部である延長雄ねじ形成部１０ｙ、１０ｚに全開下ストッパ１７及び支持リング９（全閉上ストッパ部９ａ）を螺嵌して固定したため、従来のような煩雑な成形工程が不要となり、全開下ストッパ１７、支持リング９（全閉上ストッパ部９ａ）及び弁軸１０並びにこれらの組立体（従来のロータ送りねじ１７０に類似する構造を有する物）を容易に製造することができ、製造コストの低い電動弁１を提供することができる。   As described above, the male screw portion 10a is formed on the valve shaft 10 so as to be screwed into the female screw portion 11a formed on the valve shaft holder 11, but this male screw portion 10a is further extended as it is, Since the fully opened stopper 17 and the support ring 9 (fully closed upper stopper portion 9a) are screwed and fixed to the extended male screw forming portions 10y and 10z which are the extended portions, the conventional complicated molding process is not required and the fully opened portion is fully opened. The stopper 17, the support ring 9 (fully closed upper stopper portion 9a), the valve shaft 10 and the assembly thereof (thing having a structure similar to that of the conventional rotor feed screw 170) can be easily manufactured. A low electric valve 1 can be provided.

次に、本発明にかかる電動弁の第２の実施形態について、図２を参照しながら説明する。図２（ａ）は全閉時の断面図を示し、図２（ｂ）は全開時の断面図を示す。   Next, a second embodiment of the motor-operated valve according to the present invention will be described with reference to FIG. FIG. 2A shows a cross-sectional view when fully closed, and FIG. 2B shows a cross-sectional view when fully opened.

この電動弁３１は、２本の導管３２、３３と弁座３４とを備える弁本体３５と、弁本体３５に接合されたキャン３６と、キャン３６の内部に配置され、電動モータの一部を構成するロータ３７と、キャン３６の外周部に固定され、ロータ３７を回転駆動するステータ（不図示）と、ロータ３７に一体に連結され、弁軸４０が内挿された弁軸ホルダ（雌ねじ部材）３９と、弁本体３５に下端部が圧入固定されたガイドブッシュ（雄ねじ部材）４３と、弁軸４０と一体に形成された弁体４２等で構成される。   The motor-operated valve 31 includes a valve main body 35 including two conduits 32 and 33 and a valve seat 34, a can 36 joined to the valve main body 35, a can 36, and a part of the electric motor. A rotor 37 that is configured, a stator (not shown) that is fixed to the outer periphery of the can 36, and that rotates the rotor 37, and a valve shaft holder (internal thread member) that is integrally connected to the rotor 37 and in which the valve shaft 40 is inserted. 39), a guide bush (male screw member) 43 whose lower end is press-fitted and fixed to the valve body 35, a valve body 42 formed integrally with the valve shaft 40, and the like.

弁本体３５は、円筒状に形成され、２本の導管３２、３３によって形成される２つの流路３２ａ、３３ａに連通する弁室３５ａを備える。弁室３５ａと流路３３ａとの間に弁座３４が位置し、弁体４２が弁座３４内に挿脱されることで電動弁３１が開閉する。   The valve main body 35 includes a valve chamber 35a that is formed in a cylindrical shape and communicates with two flow paths 32a and 33a formed by two conduits 32 and 33. The valve seat 34 is located between the valve chamber 35a and the flow path 33a, and the motor-operated valve 31 opens and closes when the valve body 42 is inserted into and removed from the valve seat 34.

キャン３６は、下部が開口し、上部が閉じた円筒状に形成され、弁本体３５の上部に接合リング４９を介して接合される。キャン３６の内部には、ロータ３７等の主要部品が収容される。   The can 36 is formed in a cylindrical shape having an open bottom and a closed top, and is joined to the top of the valve body 35 via a joining ring 49. Inside the can 36, main components such as the rotor 37 are accommodated.

ロータ３７は、円筒状に形成され、キャン３６の内部に回転可能に配置され、弁軸ホルダ３９と一体に連結される。ロータ３７と、キャン３６の外周部に固定されたステータとで電動モータが構成され、ステータへの給電によりロータ３７が回転する。   The rotor 37 is formed in a cylindrical shape, is rotatably disposed inside the can 36, and is integrally connected to the valve shaft holder 39. The rotor 37 and the stator fixed to the outer peripheral portion of the can 36 constitute an electric motor, and the rotor 37 is rotated by supplying power to the stator.

弁軸４０は、弁軸ホルダ３９の上部に若干の間隙をもって内挿され、弁軸４０の上端部は、弁軸ホルダ３９の天上面に載置されたナット４１に圧入固定される。弁軸４０は、下部に弁体４２を一体に備える。この弁軸４０の弁軸ホルダ３９に対する内挿部には上記のように間隙が設けられているが、弁軸４０が、弁軸ホルダ３９の内部に収容されたコイルばね４４によって常に下方に付勢されることにより、弁軸ホルダ３９の進退動が安定して弁軸４０に伝達される。   The valve shaft 40 is inserted into the upper portion of the valve shaft holder 39 with a slight gap, and the upper end portion of the valve shaft 40 is press-fitted and fixed to a nut 41 mounted on the top surface of the valve shaft holder 39. The valve shaft 40 is integrally provided with a valve body 42 at the bottom. The gap between the valve shaft 40 and the valve shaft holder 39 is provided as described above. However, the valve shaft 40 is always attached downward by a coil spring 44 housed inside the valve shaft holder 39. By being energized, the forward and backward movement of the valve shaft holder 39 is stably transmitted to the valve shaft 40.

弁軸ホルダ３９は、ロータ３７に一体化され、上部に弁軸４０を内挿する。弁軸ホルダ３９には、ガイドブッシュ４３の雄ねじ部４３ａに螺合する雌ねじ部３９ａが螺刻されるとともに、下端部に全閉上ストッパ部３９ｂ（可動側ストッパ）が突設される。   The valve shaft holder 39 is integrated with the rotor 37, and the valve shaft 40 is inserted into the upper portion thereof. The valve shaft holder 39 is threaded with a female screw portion 39a that is screwed into the male screw portion 43a of the guide bush 43, and has a fully closed upper stopper portion 39b (movable side stopper) protruding from the lower end portion.

弁軸ホルダ３９の天井面には、コイルばねからなる復帰ばね４６が設けられる。この復帰ばね４６は、ガイドブッシュ４３の雄ねじ部４３ａと弁軸ホルダ３９の雌ねじ部３９ａとの螺合が外れたときに、キャン３６の内面に当接して両ねじ部３９ａ、４３ａの螺合を復帰させるように働く。   A return spring 46 made of a coil spring is provided on the ceiling surface of the valve shaft holder 39. The return spring 46 abuts against the inner surface of the can 36 when the male threaded portion 43a of the guide bush 43 and the female threaded portion 39a of the valve shaft holder 39 are unscrewed, thereby screwing both the threaded portions 39a and 43a. Work to reinstate.

ガイドブッシュ４３は、弁本体３５にその下端部が圧入固定されるとともに、その中央部付近に弁軸ホルダ３９の雌ねじ部３９ａに螺合する雄ねじ部４３ａが螺刻される。ガイドブッシュ４３の側面には、弁室３５ａとキャン３６の内部との均圧を図る均圧孔４５が穿設される。   The lower end portion of the guide bush 43 is press-fitted and fixed to the valve body 35, and a male screw portion 43a that is screwed into the female screw portion 39a of the valve shaft holder 39 is screwed in the vicinity of the center portion thereof. On the side surface of the guide bush 43, a pressure equalizing hole 45 is provided for equalizing pressure between the valve chamber 35a and the inside of the can 36.

全閉下ストッパ（固定側ストッパ）４７は、その雌ねじ部４７ｂがガイドブッシュ４３の延長雄ねじ形成部４３ｙと螺合して固定される。すなわち、ガイドブッシュ４３には、弁軸ホルダ３９に形成された雌ねじ部３９ａに螺合するために雄ねじ部４３ａが形成されているが、この雄ねじ部４３ａをさらに弁座３４の方向にそのまま連続して延長し、この延長部分（延長雄ねじ形成部４３ｙ）に全閉下ストッパ４７が螺合している。言い換えれば、前記雄ねじ部４３ａは、本来は雌ねじ部３９ａに螺合する範囲で形成されれば良いが、この実施の形態では、雄ねじ部４３ａをさらにその範囲を弁座３４側に向かうようにそのまま連続して延長して延長雄ねじ形成部とし、その延長雄ねじ形成部４３ｙに全閉下ストッパ４７が螺嵌され、該ストッパ４７が段差部４３ｅに当接することにより固定されている。   The fully-closed stopper (fixed side stopper) 47 is fixed by screwing the female thread portion 47 b with the extended male thread forming portion 43 y of the guide bush 43. That is, the guide bush 43 is formed with a male screw portion 43a to be screwed into a female screw portion 39a formed in the valve shaft holder 39. The male screw portion 43a is further continued in the direction of the valve seat 34 as it is. The fully-closed stopper 47 is screwed into the extended portion (extended male screw forming portion 43y). In other words, the male screw portion 43a may be formed in a range where it is originally engaged with the female screw portion 39a. However, in this embodiment, the male screw portion 43a is further moved as it is toward the valve seat 34 as it is. Continuously extending to form an extended male screw forming portion, a fully closed lower stopper 47 is screwed into the extended male screw forming portion 43y, and the stopper 47 is fixed by contacting the stepped portion 43e.

この全閉下ストッパ４７は、延長雄ねじ形成部４３ｙに螺嵌するのみで、弁軸４０に対して特に接着、溶接等による固着は不要である。すなわち、当該電動弁の使用により全閉下ストッパ４７の螺嵌が仮に緩くなっても、その閉弁方向の動作により、全閉上ストッパ部３９ｂが全閉下ストッパ４７に当接し、該全閉下ストッパ４７は段差部４３ｅ方向に回動され、弁軸４０に対して再度堅固に固定される。もちろん、上記の固着を行うようにしても良い。   This fully-closed stopper 47 is only screwed into the extension male screw forming portion 43y, and is not particularly required to be fixed to the valve shaft 40 by adhesion, welding or the like. That is, even if the screwing of the full-close stopper 47 is loosened due to the use of the motor-operated valve, the full-close stopper portion 39b comes into contact with the full-close stopper 47 by the operation in the valve closing direction, and the full-close stopper 47 The lower stopper 47 is rotated in the direction of the stepped portion 43e and is firmly fixed to the valve shaft 40 again. Of course, the above fixing may be performed.

尚、延長雄ねじ形成部４３ｙの雄ねじの形成を段差部４３ｅの手前までとし、その雄ねじの切り終わりの部分にて全閉下ストッパ４７を当接固定するようにしても良い。   Alternatively, the male thread of the extended male thread forming portion 43y may be formed up to the front of the stepped portion 43e, and the fully closed lower stopper 47 may be abutted and fixed at the end of the male thread cutting.

ここで、全閉下ストッパ４７及び弁軸ホルダ３９の２つの部品は、共通の雄ねじ（延長雄ねじ形成部４３ｙ及び雄ねじ部４３ａ）に螺合しているので、該全閉下ストッパ４７及び弁軸ホルダ３９の各々に形成される雌ねじの切り始め位置を基準に各々のストッパ（全閉下ストッパ部４７ａ及び全閉上ストッパ部３９ｂ）の形成位置（雌ねじの切り始め位置からの回転方向における各ストッパの形成位置）及び高さを決定すれば、各々のストッパの当接量（当接高さ）を適切に設定することができる。   Here, since the two parts of the fully closed stopper 47 and the valve shaft holder 39 are screwed into a common male screw (extended male screw forming portion 43y and male screw portion 43a), the fully closed stopper 47 and the valve shaft Positions of the respective stoppers (full-closed stopper portion 47a and fully-closed upper stopper portion 39b) on the basis of the female screw cutting start position formed on each of the holders 39 (each stopper in the rotation direction from the female screw cutting start position) If the position and height are determined, the contact amount (contact height) of each stopper can be set appropriately.

次に、上記構成を有する電動弁３１の動作について、図２を参照しながら説明する。   Next, the operation of the motor-operated valve 31 having the above configuration will be described with reference to FIG.

電動弁３１を閉じる場合には、例えば図２（ｂ）の状態で、ステータに一方向の通電を行い励磁すると、ロータ３７が上面視時計方向に回転すると同時に弁軸ホルダ３９及び弁軸４０も回転下降し、弁体４２が弁座３４内に挿入される。   When closing the motor-operated valve 31, for example, when the stator is energized in one direction and excited in the state shown in FIG. 2B, the rotor 37 rotates in the clockwise direction when viewed from the top, and the valve shaft holder 39 and the valve shaft 40 are also rotated. The valve body 42 is inserted into the valve seat 34.

弁体４２が弁座３４内の所定位置まで挿入された後、ロータ３７がさらに回転して弁軸ホルダ３９の全閉上ストッパ部３９ｂが全閉下ストッパ部４７ａに当接し、弁軸ホルダ３９の下降が強制的に停止され、図２（ａ）に示す姿勢で動作が終了する。   After the valve body 42 is inserted to a predetermined position in the valve seat 34, the rotor 37 further rotates and the fully closed upper stopper portion 39 b of the valve shaft holder 39 contacts the fully closed lower stopper portion 47 a, so that the valve shaft holder 39 Is forcibly stopped, and the operation ends in the posture shown in FIG.

この例においては、上記のように弁軸ホルダ３９の下降が強制的に停止された場合においても、弁体４２と弁座３４との間には若干の間隙があり、流体の少量流出が可能となっている。従って、弁軸４０が最も下降した時においてもその下降が弁座３４によって妨げられることがないので、弁軸４０の最下降位置においても、スプリング４４は圧縮されることはない。   In this example, even when the lowering of the valve shaft holder 39 is forcibly stopped as described above, there is a slight gap between the valve body 42 and the valve seat 34, and a small amount of fluid can flow out. It has become. Accordingly, even when the valve shaft 40 is lowered most, the lowering thereof is not hindered by the valve seat 34, so that the spring 44 is not compressed even in the lowest lowered position of the valve shaft 40.

一方、電動弁３１を開く場合には、例えば図２（ａ）の状態で、ステータに上記とは逆方向の通電を行い励磁すると、ロータ３７が上面視反時計方向に回転すると同時に弁軸ホルダ３９及び弁軸４０も回転上昇し、弁体４２が弁座３４から離れて電動弁３１が開弁する。   On the other hand, when opening the motor-operated valve 31, for example, in the state of FIG. 2A, when the stator is energized by energizing in the opposite direction to the above, the rotor 37 rotates counterclockwise as viewed from above and at the same time the valve shaft holder 39 and the valve shaft 40 also rotate and rise, the valve body 42 moves away from the valve seat 34, and the motor-operated valve 31 opens.

以上のように、弁軸ホルダ３９に形成された雌ねじ部３９ａに螺合するためにガイドブッシュ４３に雄ねじ部４３ａが形成されているが、この雄ねじ部４３ａをさらに弁座３４の方向に延長して延長雄ねじ形成部４３ｙとし、この延長部分に全閉下ストッパ４７を螺嵌して固定したため、本実施の形態によっても、従来のような煩雑な成形工程が不要となり、全閉下ストッパ４７をガイドブッシュ４３並びにこれらの組立体（従来のロータ送りねじ１７０に相当する物）を容易に製造することができ、製造コストの低い電動弁３１を提供することができる。   As described above, the male threaded portion 43a is formed in the guide bush 43 to be screwed into the female threaded portion 39a formed in the valve shaft holder 39. The male threaded portion 43a is further extended in the direction of the valve seat 34. Since the extension male thread forming portion 43y is formed and the full-closed stopper 47 is screwed and fixed to the extended portion, the present embodiment does not require a complicated molding process as in the prior art. The guide bush 43 and these assemblies (equivalent to the conventional rotor feed screw 170) can be easily manufactured, and the electric valve 31 with low manufacturing cost can be provided.

さて、図２の説明においては、弁軸ホルダ３９の下降が強制的に停止された場合においても、弁体４２と弁座３４との間には若干の間隙があり、流体の少量流出が可能となっているものとした。   In the description of FIG. 2, even when the lowering of the valve shaft holder 39 is forcibly stopped, there is a slight gap between the valve body 42 and the valve seat 34, and a small amount of fluid can flow out. It was supposed to be.

しかし、弁体４２が弁座３４に当接して閉弁時に流体の流出が遮断されるように当該電動弁が構成されても良い。この場合、弁体４２が弁座３４に当接した後は、スプリング４４が圧縮されながら弁軸ホルダ３９のみがさらに下降し、その後ストッパの当接により弁軸ホルダ３９の回転が停止される。   However, the motor-operated valve may be configured so that the valve body 42 contacts the valve seat 34 and fluid outflow is blocked when the valve is closed. In this case, after the valve body 42 contacts the valve seat 34, only the valve shaft holder 39 further descends while the spring 44 is compressed, and then the rotation of the valve shaft holder 39 is stopped by the contact of the stopper.

次に、本発明にかかる電動弁の第３の実施形態について、図３を参照しながら説明する。図３（ａ）は全閉時の断面図を示し、図３（ｂ）は全開時の断面図を示す。   Next, a third embodiment of the motor-operated valve according to the present invention will be described with reference to FIG. FIG. 3A shows a sectional view when fully closed, and FIG. 3B shows a sectional view when fully opened.

この電動弁５１は、図１に示した電動弁１と以下の点で異なる。すなわち、弁軸（雄ねじ部材）８０と弁体８２との間にばね収容部材８３を介装し、コイルばね８４をばね収容部材８３の内部に縮装し、下方に凸状に形成された椀状部材７３を介して弁体８２を押圧している。また、弁本体７５を薄肉の椀状に形成し、樹脂で成形した弁軸ホルダ（雌ねじ部材）８１を接合リング８５を介して溶接等で弁本体７５に装着している。弁軸８０の上端の側表面に全閉上ストッパ部８７ａを有する全閉上ストッパ８７が螺嵌され、弁軸ホルダ８１の嵌挿部８１ｂの天井部８１ｅの内面には全開上ストッパ部８１ｆが形成され、弁軸ホルダ８１の上端には全閉下ストッパ部８１ｄが形成されている。弁体８２は、弁軸８０の下端部８０ｂにおいてかしめ固定されているばね収容部材８３に圧入固定されている係止リング８６により抜け止め係止されている。椀状部材７３、薄肉の弁本体７５、及び樹脂成形した弁軸ホルダ８１を用いたのは、電動弁５１の軽量化のためである。   The motor-operated valve 51 differs from the motor-operated valve 1 shown in FIG. 1 in the following points. That is, a spring housing member 83 is interposed between the valve shaft (male thread member) 80 and the valve body 82, and the coil spring 84 is shrunk inside the spring housing member 83 so as to project downward. The valve body 82 is pressed through the shaped member 73. Further, the valve main body 75 is formed in a thin bowl shape, and a valve shaft holder (female screw member) 81 formed of resin is attached to the valve main body 75 via a joining ring 85 by welding or the like. A fully-closed stopper 87 having a fully-closed stopper 87a is screwed onto the upper surface of the valve shaft 80, and a fully-open stopper 81f is formed on the inner surface of the ceiling 81e of the fitting insertion portion 81b of the valve shaft holder 81. A fully closed stopper portion 81 d is formed at the upper end of the valve shaft holder 81. The valve body 82 is latched and locked by a locking ring 86 that is press-fitted and fixed to a spring accommodating member 83 that is caulked and fixed at the lower end 80 b of the valve shaft 80. The reason why the flange-shaped member 73, the thin valve body 75, and the resin-molded valve shaft holder 81 are used is to reduce the weight of the electric valve 51.

弁本体７５は、上方に開口する椀状に形成され、導管５２と、弁座部材５４を介して導管５３とが接続される。弁本体７５は、２本の導管５２、５３によって形成される２つの流路５２ａ、５３ａに連通する弁室７５ａを備える。弁室７５ａ内に弁座５４ａが位置し、弁体８２を弁座５４ａに接離させることで電動弁５１が開閉する。   The valve body 75 is formed in a bowl shape that opens upward, and the conduit 52 is connected to the conduit 53 via the valve seat member 54. The valve body 75 includes a valve chamber 75a communicating with two flow paths 52a and 53a formed by two conduits 52 and 53. The valve seat 54a is located in the valve chamber 75a, and the motor-operated valve 51 is opened and closed by bringing the valve body 82 into and out of contact with the valve seat 54a.

キャン５６は、下部が開口し、上部が閉じた円筒状に形成され、弁本体７５の上部の接合リング８５に接合される。キャン５６の内部には、ロータ５７等の主要部品が収容される。   The can 56 is formed in a cylindrical shape having an open bottom and a closed top, and is joined to a joining ring 85 on the top of the valve body 75. Inside the can 56, main components such as the rotor 57 are accommodated.

ロータ５７は、円筒状に形成され、キャン５６の内部に回転可能に配置される。このロータ５７は、弁軸８０の上部に固定された支持リング５９を介して、弁軸８０と一体に連結される。ロータ５７と、キャン５６の外周部に固定されたステータとで電動モータ（例えばステッピングモータ）が構成され、ステータへの給電によりロータ５７が回転する。   The rotor 57 is formed in a cylindrical shape, and is disposed rotatably inside the can 56. The rotor 57 is integrally connected to the valve shaft 80 via a support ring 59 fixed to the upper portion of the valve shaft 80. The rotor 57 and the stator fixed to the outer peripheral portion of the can 56 constitute an electric motor (for example, a stepping motor), and the rotor 57 is rotated by supplying power to the stator.

支持リング５９の下方には、全閉上ストッパ部８７ａを有する全閉上ストッパ８７が弁軸８０の延長雄ねじ形成部８０ｚに螺嵌され、全閉上ストッパ部８７ａは、弁軸ホルダ８１の上面に向かって突出する。   Below the support ring 59, a fully closed stopper 87 having a fully closed stopper 87 a is screwed into the extended male thread forming portion 80 z of the valve shaft 80, and the fully closed stopper 87 a is an upper surface of the valve shaft holder 81. Protrusively toward.

弁軸８０は、弁軸ホルダ８１の雌ねじ部８１ａと螺合する雄ねじ部８０ａが螺刻されるとともに、嵌挿部８１ｂが下方に向かって開口する。弁軸８０に形成された雄ねじ部８０ａに隣接して、さらに弁座５４ａと反対方向に雄ねじ部８０ａの雄ねじがそのまま延長して形成されるようにして延長雄ねじ形成部８０ｚが設けられている。すなわち、雄ねじ部８０ａは、本来は弁軸ホルダ８１に設けられた雌ねじ部８１ａに螺合する範囲で形成されれば良いが（すなわち、雄ねじ部８０ａは、弁体８２を駆動する駆動ねじである）、この実施の形態では、雄ねじ部８０ａをさらにその範囲を弁座５４ａと反対側に向かうようにそのまま連続して延長して、延長雄ねじ形成部８０ｚとして形成している。そして、この延長雄ねじ形成部８０ｚに、全閉上ストッパ部８７ａを備えた全閉上ストッパ８７（可動側ストッパ）が螺嵌されている。   The valve shaft 80 is threaded with a male screw portion 80a that is screwed with the female screw portion 81a of the valve shaft holder 81, and the fitting insertion portion 81b opens downward. An extended male screw forming portion 80z is provided adjacent to the male screw portion 80a formed on the valve shaft 80, so that the male screw of the male screw portion 80a is further extended in the opposite direction to the valve seat 54a. That is, the male screw portion 80a may be formed in a range that is originally screwed with the female screw portion 81a provided in the valve shaft holder 81 (that is, the male screw portion 80a is a drive screw that drives the valve element 82). In this embodiment, the male threaded portion 80a is further continuously extended as it is so as to face the opposite side of the valve seat 54a, thereby forming an extended male thread forming portion 80z. A fully closed upper stopper 87 (movable side stopper) having a fully closed upper stopper portion 87a is screwed into the extended male screw forming portion 80z.

この全閉上ストッパ８７は、延長雄ねじ形成部８０ｚに螺合し、支持リング５９の下面に当接するのみで、弁軸８０や支持リング５９に対して特に接着、溶接等による固着は不要である。すなわち、当該電動弁５１の使用により全閉上ストッパ８７の螺合が仮に緩くなっても、その閉弁方向の動作により、全閉上ストッパ部８７ａが全閉下ストッパ部８１ｄに当接し、該全閉上ストッパ８７は支持リング５９の下面の方向に回動され、弁軸８０に対して再度堅固に固定される。もちろん、上記の固着を行うようにしても良い。   The fully closed upper stopper 87 is only screwed into the extended male screw forming portion 80z and abuts on the lower surface of the support ring 59, and is not particularly fixed to the valve shaft 80 or the support ring 59 by adhesion or welding. . That is, even if the screwing of the fully-closed stopper 87 is loosened by using the electric valve 51, the fully-closed stopper part 87a comes into contact with the fully-closed stopper part 81d by the operation in the valve-closing direction, The fully closed upper stopper 87 is rotated in the direction of the lower surface of the support ring 59 and is firmly fixed to the valve shaft 80 again. Of course, the above fixing may be performed.

また、弁軸８０に形成された雄ねじ部８０ａに隣接して、さらに弁座５４ａの方向に雄ねじ部８０ａの雄ねじがそのまま延長して形成されるようにして延長雄ねじ形成部８０ｙが設けられている。すなわち、上述のように、雄ねじ部８０ａは、本来は雌ねじ部８１ａに螺合する範囲で形成されれば良いが、この実施の形態では、雄ねじ部８０ａをさらにその範囲を弁座５４ａ側に向かうようにそのまま延長して、延長雄ねじ形成部８０ｙとして形成している。   An extended male screw forming portion 80y is provided adjacent to the male screw portion 80a formed on the valve shaft 80 so that the male screw of the male screw portion 80a extends as it is toward the valve seat 54a. . That is, as described above, the male screw portion 80a may be formed in a range that is originally screwed with the female screw portion 81a, but in this embodiment, the male screw portion 80a is further directed toward the valve seat 54a. Thus, it is extended as it is and formed as an extended male screw forming portion 80y.

ばね収容部材８３は、弁軸８０の下端部８０ｂにかしめ固定され、ばね収容部材８３と椀状部材７３との間にコイルばね８４が縮装される。   The spring accommodating member 83 is caulked and fixed to the lower end portion 80 b of the valve shaft 80, and the coil spring 84 is retracted between the spring accommodating member 83 and the hook-shaped member 73.

全開下ストッパ６７（可動側ストッパ）は、その雌ねじ部６７ｂを弁軸８０の端部（延長雄ねじ形成部８０ｚ）にねじ込み、雄ねじ部８０ａを経由して延長雄ねじ形成部８０ｙに至り、ばね収容部材８３の天井部８３ａに当接させることにより固定される。この全開下ストッパ６７は、延長雄ねじ形成部８０ｙに螺合し、ばね収容部材８３の天井部８３ａに当接するのみで、弁軸８０やばね収容部材８３に対して特に接着、溶接等による固着は不要である。すなわち、当該電動弁５１の使用により全開下ストッパ６７の螺合が仮に緩くなっても、その閉弁方向の動作により、全開下ストッパ部６７ａが全開上ストッパ部８１ｆに当接し、該全開下ストッパ６７はばね収容部材８３の天井部８３ａの方向に回動され、弁軸８０に対して再度堅固に固定される。もちろん、上記の固着を行うようにしても良い。   The fully open stopper 67 (movable side stopper) has its female threaded portion 67b screwed into the end portion (extended male screw forming portion 80z) of the valve shaft 80, and reaches the extended male screw forming portion 80y via the male screw portion 80a. It fixes by making it contact | abut to the ceiling part 83a of 83. FIG. This fully open stopper 67 is screwed into the extension male screw forming portion 80y and only abuts against the ceiling portion 83a of the spring accommodating member 83, and is not particularly fixed to the valve shaft 80 or the spring accommodating member 83 by adhesion, welding or the like. It is unnecessary. That is, even if the screwing of the fully open stopper 67 is loosened by the use of the electric valve 51, the fully open stopper portion 67a abuts on the fully open stopper portion 81f by the operation in the valve closing direction, and the fully open stopper 67 is rotated in the direction of the ceiling portion 83 a of the spring accommodating member 83 and is firmly fixed to the valve shaft 80 again. Of course, the above fixing may be performed.

尚、延長雄ねじ形成部８０ｙの雄ねじの形成を天井部８３ａの手前までとし、その雄ねじの切り終わりの部分にて全開下ストッパ６７を当接固定するようにしても良い。   Note that the male screw of the extended male screw forming portion 80y may be formed up to the front of the ceiling 83a, and the fully open stopper 67 may be abutted and fixed at the end of the male screw cutting.

弁軸ホルダ８１は、上部に雌ねじ部８１ａが螺刻されるとともに、弁軸ホルダ８１の下部には、ばね収容部材８３の外周に配在され、下端部８１ｃが下方に向かって開口し、天井部８１ｅを備える筒状の嵌挿部８１ｂを備える。嵌挿部８１ｂの下端部８１ｃは、接合リング８５に一体成形されている。そして、弁軸ホルダ８１の雌ねじ部８１ａと弁軸８０の雄ねじ部８０ａとが螺合し、弁軸ホルダ８１の内部を弁軸８０が上下方向に案内される。また、弁軸ホルダ８１の上面には、全閉下ストッパ部（固定側ストッパ）８１ｄが設けられ、天井部８１ｅのばね収容部材８３側の面には、全開上ストッパ部（固定側ストッパ）８１ｆが設けられる。   The valve shaft holder 81 has a female threaded portion 81a threaded on the upper portion thereof, and is disposed on the outer periphery of the spring accommodating member 83 at the lower portion of the valve shaft holder 81. The lower end portion 81c opens downward, and the ceiling A cylindrical fitting insertion portion 81b including a portion 81e is provided. A lower end portion 81 c of the fitting insertion portion 81 b is integrally formed with the joining ring 85. Then, the female screw portion 81a of the valve shaft holder 81 and the male screw portion 80a of the valve shaft 80 are screwed together, and the valve shaft 80 is guided in the vertical direction inside the valve shaft holder 81. Further, a fully closed stopper portion (fixed side stopper) 81d is provided on the upper surface of the valve shaft holder 81, and a fully open stopper portion (fixed side stopper) 81f is provided on the surface of the ceiling portion 81e on the spring accommodating member 83 side. Is provided.

ここで、全開下ストッパ６７、弁軸ホルダ８１及び全閉上ストッパ８７の３つの部品は、共通の雄ねじ（延長雄ねじ形成部８０ｙ、雄ねじ部８０ａ及び延長雄ねじ形成部８０ｚ）に螺合しているので、該全開下ストッパ６７、弁軸ホルダ８１及び全閉上ストッパ８７の各々に形成される雌ねじの切り始め位置を基準に各々のストッパ（全開下ストッパ部６７ａ、全開上ストッパ部８１ｆ、全閉下ストッパ部８１ｄ及び全閉上ストッパ部８７ａ）の形成位置（雌ねじの切り始め位置からの回転方向における各ストッパ部の形成位置）及び高さを決定すれば、各々のストッパ部の当接量（当接高さ）を適切に設定することができる。   Here, the three parts of the fully open stopper 67, the valve shaft holder 81, and the fully closed stopper 87 are screwed into a common male screw (extended male screw forming portion 80y, male screw portion 80a, and extended male screw forming portion 80z). Therefore, each of the stoppers (fully opened stopper portion 67a, fully opened stopper portion 81f, fully closed) is defined with reference to the cutting start position of the internal thread formed in each of the fully opened stopper 67, the valve shaft holder 81 and the fully closed upper stopper 87. If the formation position (formation position of each stopper part in the rotation direction from the cutting start position of the internal thread) and the height of the lower stopper part 81d and the fully closed upper stopper part 87a) are determined, the amount of contact of each stopper part ( (Contact height) can be set appropriately.

弁体８２は、下部に円錐状部分を有し、全体的に円柱状に形成される。弁体８２の上部８２ａは、ばね収容部材８３に内挿されるとともに、係止リング８６により抜け止め係止される。   The valve body 82 has a conical portion at the lower portion and is formed in a cylindrical shape as a whole. The upper part 82 a of the valve body 82 is inserted into the spring accommodating member 83 and is locked and prevented by the locking ring 86.

次に、上記構成を有する電動弁５１の動作について、図３を参照しながら説明する。   Next, operation | movement of the motor operated valve 51 which has the said structure is demonstrated, referring FIG.

電動弁５１を閉じる場合には、例えば図３（ｂ）の状態で、ステータに一方向の通電を行い励磁すると、ロータ５７が上面視時計方向に回転すると同時に弁軸８０も回転下降し、弁体８２が弁座５４ａに着座して電動弁５１が閉弁する。   When the motor-operated valve 51 is closed, for example, when the stator is energized in one direction in the state shown in FIG. 3B, the rotor 57 rotates in the clockwise direction as viewed from above, and the valve shaft 80 also rotates and descends. The body 82 is seated on the valve seat 54a, and the motor-operated valve 51 is closed.

弁体８２が弁座５４ａに着座した時点では、全閉上ストッパ部８７ａが全閉下ストッパ部８１ｄまで到達せず、ロータ５７がさらに回転可能な状態にある。ロータ５７がさらに上面視時計方向に回転し、全閉上ストッパ部８７ａが全閉下ストッパ部８１ｄに当接すると、ロータ５７の回転が強制的に停止される。   When the valve element 82 is seated on the valve seat 54a, the fully closed upper stopper portion 87a does not reach the fully closed lower stopper portion 81d, and the rotor 57 is further rotatable. When the rotor 57 further rotates in the clockwise direction as viewed from above and the fully closed upper stopper portion 87a contacts the fully closed lower stopper portion 81d, the rotation of the rotor 57 is forcibly stopped.

また、弁体８２が弁座５４ａに着座すると、弁体８２の移動は停止するが、弁軸８０はさらに下降するため、コイルばね８４が圧縮されて弁体８２を弁座５４ａに押圧し、図３（ａ）に示す姿勢で動作が終了する。   Further, when the valve element 82 is seated on the valve seat 54a, the movement of the valve element 82 stops, but the valve shaft 80 is further lowered, so that the coil spring 84 is compressed and presses the valve element 82 against the valve seat 54a, The operation ends with the posture shown in FIG.

一方、電動弁５１を開く場合には、例えば図３（ａ）の状態で、ステータに上記とは逆方向の通電を行い励磁すると、ロータ５７が上面視反時計方向に回転し、弁軸８０が上昇し、弁体８２が弁座５４ａから離れて電動弁５１が開弁する。そして、ロータ５７がさらに回転し、全開下ストッパ部６７ａが全開上ストッパ部８１ｆに当接すると、ロータ５７の回転が停止し、弁体８２の上昇も停止する。   On the other hand, when opening the motor-operated valve 51, for example, in the state of FIG. 3A, when the stator is energized in the direction opposite to the above, the rotor 57 rotates counterclockwise as viewed from above, and the valve shaft 80 Rises, the valve body 82 moves away from the valve seat 54a, and the motor-operated valve 51 opens. Then, when the rotor 57 further rotates and the fully open lower stopper portion 67a comes into contact with the fully open upper stopper portion 81f, the rotation of the rotor 57 is stopped and the lift of the valve body 82 is also stopped.

以上のように、弁軸ホルダ８１に形成された雌ねじ部８１ａに螺合するために弁軸８０に雄ねじ部８０ａが形成されているが、この雄ねじ部８０ａをさらにそのまま延長して形成し、その延長部である延長雄ねじ形成部８０ｙ、８０ｚに全開下ストッパ６７（全開下ストッパ部６７ａ）及び全閉上ストッパ８７（全閉上ストッパ部８７ａ）を螺嵌して固定したため、従来のような煩雑な成形工程が不要となり、全開下ストッパ６７、全閉上ストッパ８７及び弁軸８０並びにこれらの組立体（従来のロータ送りねじ１７０に類似する構造を有する物）を容易に製造することができ、製造コストの低い電動弁５１を提供することができる。   As described above, the male screw portion 80a is formed on the valve shaft 80 so as to be screwed to the female screw portion 81a formed on the valve shaft holder 81. The male screw portion 80a is further extended as it is, Since the fully opened stopper 67 (fully opened stopper portion 67a) and the fully closed stopper 87 (fully closed stopper portion 87a) are screwed and fixed to the extended male screw forming portions 80y and 80z that are the extended portions, the conventional troublesomeness A complete molding step is not required, and the fully open stopper 67, the fully closed stopper 87, the valve shaft 80, and the assembly thereof (thing having a structure similar to the conventional rotor feed screw 170) can be easily manufactured. The electric valve 51 with a low manufacturing cost can be provided.

１ 電動弁
２ 導管
２ａ 流路
３ 導管
３ａ 流路
４ 弁座
５ 弁本体
５ａ 弁室
５ｂ 連結保持部
６ キャン
７ ロータ
９ 支持リング
９ａ 全閉上ストッパ部（可動側ストッパ）
１０ 弁軸（雄ねじ部材）
１０ａ 雄ねじ部
１０ｂ ばね収容部
１０ｃ 下端部
１０ｅ 天井部
１０ｙ 延長雄ねじ形成部
１０ｚ 延長雄ねじ形成部
１１ 弁軸ホルダ（雌ねじ部材）
１１ａ 雌ねじ部
１１ｂ 嵌挿部
１１ｃ 下端部
１１ｄ 全閉下ストッパ部（固定側ストッパ）
１１ｅ 天井部
１１ｆ 全開上ストッパ部（固定側ストッパ）
１２ 弁体
１２ａ 上部
１３ ボール
１４ コイルばね
１５ 均圧孔
１６ 係止リング
１７ 全開下ストッパ（可動側ストッパ）
１７ａ 全開下ストッパ部
１７ｂ 雌ねじ部
３１ 電動弁
３２ 導管
３２ａ 流路
３３ 導管
３３ａ 流路
３４ 弁座
３５ 弁本体
３５ａ 弁室
３６ キャン
３７ ロータ
３９ 弁軸ホルダ（雌ねじ部材）
３９ａ 雌ねじ部
３９ｂ 全閉上ストッパ部（可動側ストッパ）
４０ 弁軸
４１ ナット
４２ 弁体
４３ ガイドブッシュ（雄ねじ部材）
４３ａ 雄ねじ部
４３ｅ 段差部
４３ｙ 延長雄ねじ形成部
４４ コイルばね
４５ 均圧孔
４６ 復帰ばね
４７ 全閉下ストッパ（固定側ストッパ）
４７ａ 全閉下ストッパ部
４７ｂ 雌ねじ部
４９ 接合リング
５１ 電動弁
５２ 導管
５２ａ 流路
５３ 導管
５３ａ 流路
５４ 弁座部材
５４ａ 弁座
５６ キャン
５７ ロータ
５９ 支持リング
６７ 全開下ストッパ
６７ａ 全開下ストッパ部（可動側ストッパ）
６７ｂ 雌ねじ部
７３ 椀状部材
７５ 弁本体
７５ａ 弁室
８０ 弁軸（雄ねじ部材）
８０ａ 雄ねじ部
８０ｂ 下端部
８０ｙ 延長雄ねじ形成部
８０ｚ 延長雄ねじ形成部
８１ 弁軸ホルダ（雌ねじ部材）
８１ａ 雌ねじ部
８１ｂ 嵌挿部
８１ｃ 下端部
８１ｄ 全閉下ストッパ部（固定側ストッパ）
８１ｅ 天井部
８１ｆ 全開上ストッパ部（固定側ストッパ）
８２ 弁体
８２ａ 上部
８３ ばね収容部材
８３ａ 天井部
８４ コイルばね
８５ 接合リング
８６ 係止リング
８７ 全閉上ストッパ
８７ａ 全閉上ストッパ部（可動側ストッパ） DESCRIPTION OF SYMBOLS 1 Motorized valve 2 Conduit 2a Flow path 3 Conduit 3a Flow path 4 Valve seat 5 Valve body 5a Valve chamber 5b Connection holding part 6 Can 7 Rotor 9 Support ring 9a Fully closed upper stopper part (movable stopper)
10 Valve stem (Male thread member)
10a Male thread part 10b Spring accommodating part 10c Lower end part 10e Ceiling part 10y Extension male thread formation part 10z Extension male thread formation part 11 Valve shaft holder (female thread member)
11a Female thread portion 11b Insertion portion 11c Lower end portion 11d Fully closed stopper portion (fixed side stopper)
11e Ceiling 11f Fully open stopper (fixed side stopper)
12 Valve body 12a Upper part 13 Ball 14 Coil spring 15 Pressure equalizing hole 16 Locking ring 17 Fully opened stopper (movable side stopper)
17a Fully opened stopper portion 17b Female thread portion 31 Motorized valve 32 Conduit 32a Channel 33 Channel 33a Channel 34 Valve seat 35 Valve body 35a Valve chamber 36 Can 37 Rotor 39 Valve shaft holder (Female thread member)
39a Female thread 39b Fully closed upper stopper (movable stopper)
40 Valve Shaft 41 Nut 42 Valve Element 43 Guide Bush (Male Screw Member)
43a Male threaded portion 43e Stepped portion 43y Extended male screw forming portion 44 Coil spring 45 Pressure equalizing hole 46 Return spring 47 Fully closed stopper (fixed side stopper)
47a Fully closed stopper part 47b Female thread part 49 Joining ring 51 Motorized valve 52 Conduit 52a Channel 53 Conduit 53a Channel 54 Valve seat member 54a Valve seat 56 Can 57 Rotor 59 Support ring 67 Fully open stopper 67a Fully open stopper part (movable Side stopper)
67b Female threaded portion 73 Gutter-shaped member 75 Valve body 75a Valve chamber 80 Valve shaft (Male threaded member)
80a Male thread part 80b Lower end part 80y Extension male thread formation part 80z Extension male thread formation part 81 Valve shaft holder (female thread member)
81a Female thread part 81b Insertion part 81c Lower end part 81d Fully closed stopper part (fixed side stopper)
81e Ceiling part 81f Fully open stopper part (fixed side stopper)
82 Valve body 82a Upper part 83 Spring accommodating member 83a Ceiling part 84 Coil spring 85 Joining ring 86 Locking ring 87 Fully closed upper stopper 87a Fully closed upper stopper part (movable side stopper)

Claims (8)

雄ねじ部を有し、電動モータのロータの回転に伴って回転する雄ねじ部材と、
該雄ねじ部材に設けられ、弁座と対向するように配置された弁体と、
前記雄ねじ部材の回転に伴って回転する可動側ストッパと、
弁本体に設けられ、前記雄ねじ部と螺合する雌ねじ部材と、
該雌ねじ部材に設けられ、前記可動側ストッパと当接可能な固定側ストッパとを備えた電動弁において、
前記雄ねじ部材は、前記雌ねじ部材と螺合する雄ねじ部がそのまま延長されることにより形成された延長雄ねじ形成部を備え、
前記可動側ストッパは、前記延長雄ねじ形成部における前記弁座側の端部に螺嵌されるとともに、前記固定側ストッパとは前記雄ねじ部材の回転方向に当接することを特徴とする電動弁。 A male screw member having a male screw part and rotating with the rotation of the rotor of the electric motor;
A valve body provided on the male screw member and arranged to face the valve seat;
A movable-side stopper that rotates with the rotation of the male screw member;
A female screw member provided on the valve body and screwed into the male screw part;
In the motor operated valve provided on the female screw member and provided with a fixed side stopper capable of contacting the movable side stopper,
The male screw member includes an extended male screw forming portion formed by extending a male screw portion screwed with the female screw member as it is,
It said movable side stopper includes an electric valve, characterized in that the are screwed to the ends of the definitive extension external thread forming portion wherein the valve seat side Rutotomoni, the said fixed side stopper abuts against the rotation direction of the externally threaded member. 前記延長雄ねじ形成部は、前記弁座の方向へ形成され、
前記可動側ストッパは、全開下ストッパであり、
前記固定側ストッパは、全開上ストッパであることを特徴とする請求項１記載の電動弁。 The extension male screw forming portion is formed in the direction of the valve seat,
The movable side stopper is a fully open stopper,
The electric valve according to claim 1, wherein the fixed side stopper is a fully open stopper. 前記延長雄ねじ形成部は、前記弁座と反対方向へ形成され、
前記可動側ストッパは、全閉上ストッパであり、
前記固定側ストッパは、全閉下ストッパであることを特徴とする請求項１記載の電動弁。 The extension male screw forming portion is formed in a direction opposite to the valve seat,
The movable side stopper is a fully closed upper stopper,
The electric valve according to claim 1, wherein the fixed side stopper is a fully closed stopper. 前記可動側ストッパは、前記延長雄ねじ形成部の終端に位置する平面部又は該延長雄ねじ形成部のねじ終端部に当接することにより固定されることを特徴とする請求項１ないし３のいずれかに記載の電動弁。   4. The movable side stopper is fixed by abutting against a flat portion located at a terminal end of the extended male screw forming portion or a screw terminal portion of the extended male screw forming portion. The motorized valve described. 雌ねじ部を有し、電動モータのロータの回転に伴って回転する雌ねじ部材と、
該雌ねじ部材に設けられ、弁座と対向するように配置された弁体と、
前記雌ねじ部材の回転に伴って回転する可動側ストッパと、
弁本体に設けられ、前記雌ねじ部と螺合する雄ねじ部材と、
該雄ねじ部材に設けられ、前記可動側ストッパと当接可能な固定側ストッパとを備えた電動弁において、
前記雄ねじ部材は、前記雌ねじ部材と螺合する雄ねじ部がそのまま延長されることにより形成された延長雄ねじ形成部を備え、
前記固定側ストッパは、前記延長雄ねじ形成部における前記弁座側の端部に螺嵌されるとともに、前記可動側ストッパとは前記雌ねじ部材の回転方向に当接することを特徴とする電動弁。 A female screw member having a female screw part and rotating with the rotation of the rotor of the electric motor;
A valve body provided on the female screw member and arranged to face the valve seat;
A movable-side stopper that rotates with the rotation of the female screw member;
A male screw member provided on the valve body and screwed into the female screw part;
In the motor operated valve provided on the male screw member and provided with a fixed side stopper capable of contacting the movable side stopper,
The male screw member includes an extended male screw forming portion formed by extending a male screw portion screwed with the female screw member as it is,
The fixed side stopper includes an electric valve, characterized in that the are screwed to the ends of the definitive extension external thread forming portion wherein the valve seat side Rutotomoni, the movable side stopper abuts the rotation direction of the female screw member. 前記延長雄ねじ形成部は、前記弁座の方向へ形成され、
前記可動側ストッパは、全閉上ストッパであり、
前記固定側ストッパは、全閉下ストッパであることを特徴とする請求項５記載の電動弁。 The extension male screw forming portion is formed in the direction of the valve seat,
The movable side stopper is a fully closed upper stopper,
6. The motor-operated valve according to claim 5, wherein the fixed side stopper is a fully closed stopper. 前記固定側ストッパは、前記延長雄ねじ形成部の終端に位置する平面部又は該延長雄ねじ形成部のねじ終端部に当接することにより固定されることを特徴とする請求項５又は６に記載の電動弁。   7. The electric motor according to claim 5, wherein the fixed-side stopper is fixed by contacting a flat portion located at a terminal end of the extended male screw forming portion or a screw terminal portion of the extended male screw forming portion. valve. 前記可動側ストッパ及び前記固定側ストッパは、各々に形成される雌ねじのねじ切り始め位置を基準に形成されたことを特徴とする請求項１ないし７のいずれかに記載の電動弁。   The motor-operated valve according to any one of claims 1 to 7, wherein the movable side stopper and the fixed side stopper are formed with reference to a threading start position of a female screw formed on each of the movable side stopper and the fixed side stopper.
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CN109538775A (en) * 2019-01-11 2019-03-29 江苏金晟元特种阀门股份有限公司 Resistance to strong rotten particle-resistant fluoroplastic all-liner shut-off valve
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JP6730751B2 (en) * 2019-07-03 2020-07-29 株式会社不二工機 Motorized valve
CN211175578U (en) * 2019-11-19 2020-08-04 浙江盾安禾田金属有限公司 Magnetic rotor assembly and electronic expansion valve
JP6873512B2 (en) * 2020-04-09 2021-05-19 株式会社不二工機 Electric valve
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