JP2017160992A - Motor valve - Google Patents

Motor valve Download PDF

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Publication number
JP2017160992A
JP2017160992A JP2016045776A JP2016045776A JP2017160992A JP 2017160992 A JP2017160992 A JP 2017160992A JP 2016045776 A JP2016045776 A JP 2016045776A JP 2016045776 A JP2016045776 A JP 2016045776A JP 2017160992 A JP2017160992 A JP 2017160992A
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Prior art keywords
stopper
valve
support member
outer periphery
locking
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JP2016045776A
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JP6521890B2 (en
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大樹 中川
Daiki Nakagawa
大樹 中川
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Saginomiya Seisakusho Inc
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Saginomiya Seisakusho Inc
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Priority to JP2016045776A priority Critical patent/JP6521890B2/en
Priority to CN201710108951.4A priority patent/CN107178645B/en
Publication of JP2017160992A publication Critical patent/JP2017160992A/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
    • 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
    • F16K31/046—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor with electric means, e.g. electric switches, to control the motor or to control a clutch between the valve and the 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
    • 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

Abstract

PROBLEM TO BE SOLVED: To make a stopper mechanism robust, in a motor valve including the stopper mechanism having a guide part, a driven slider and a lower end stopper.SOLUTION: A stopper guide member 5 is disposed on an outer periphery of a holder part 21 of a support member 2, and into a guide part 51 of the stopper guide member 5, a driven slider 6 is screwed. A cylindrical part 71 of a catching metal fitting 7 is fitted into a base part 22 of the support member 2. A cover part 72 of the catching metal fitting 7 covers a vertical shaft 54a of a locking part 54 at a lower end part of the stopper guide member 5. A lateral shaft 54b of the locking part 54 is locked into a locking hole 72a of the cover part 72. At the hole 72a of the cover part 72, a flange part 73 of the catching metal fitting 7 is fastened to a stationary member 24 of the support member 2 with welding or the like.SELECTED DRAWING: Figure 1

Description

本発明は、マグネットロータの回転をネジ送り機構により弁体の直線運動に変換するとともに、ガイド部に螺合された従動スライダを回転して下端ストッパ部に当接させてマグネットロータの少なくとも下端位置を規制するストッパ機構を備えた電動弁に関する。   The present invention converts the rotation of the magnet rotor into a linear motion of the valve body by a screw feed mechanism, and rotates the driven slider screwed to the guide portion so as to abut the lower end stopper portion, thereby at least the lower end position of the magnet rotor. The present invention relates to a motor-operated valve provided with a stopper mechanism for regulating the pressure.

従来、この種の電動弁として、例えば特表２０１２−５３３７１８号公報（特許文献１）に開示されたものがある。この電動弁は、電動モータの磁気ローター（マグネットロータ）のネジシャフト（ロータ軸）をナット（支持部材）に螺合し、磁気ローターの回転に伴うネジ送り機構によりニードル弁を移動するものである。また、バネレール（ガイド部）にスライドリング（従動スライダ）を螺合し、磁気ローターの回転に伴ってスライドリングを移動させ、このスライドリングを下ストッパー部（下端ストッパ部）に当接させることで、磁気ローターの下端位置を規制している。すなわち、バネレール（ガイド部）、スライドリング（従動スライダ）及び下ストッパー部（下端ストッパ部）はストッパ機構を構成している。   Conventionally, as this kind of motor-operated valve, there is one disclosed in, for example, JP-T-2012-533718 (Patent Document 1). In this electric valve, a screw shaft (rotor shaft) of a magnetic rotor (magnet rotor) of an electric motor is screwed into a nut (support member), and the needle valve is moved by a screw feed mechanism accompanying the rotation of the magnetic rotor. . Also, the slide ring (driven slider) is screwed onto the spring rail (guide part), the slide ring is moved as the magnetic rotor rotates, and the slide ring is brought into contact with the lower stopper part (lower end stopper part). The lower end position of the magnetic rotor is regulated. That is, the spring rail (guide portion), the slide ring (driven slider), and the lower stopper portion (lower end stopper portion) constitute a stopper mechanism.

特表２０１２−５３３７１８号公報Special table 2012-533718 gazette

特許文献１のものでは、下ストッパー部（３３ｃ）から延びる周方向リミット部（３３ｄ）をプラスチックナット（３２）の外周に形成された凹溝（３２ｅ）に嵌合することで、バネレール（３３）の下端部を固定するようにしている。しかし、スライドリング（３４）が下ストッパー部（３３ｃ）に対して強い衝撃で当接すると、このストッパ機構が破損（外れる）虞がある。   In Patent Document 1, a spring rail (33) is formed by fitting a circumferential limit portion (33d) extending from a lower stopper portion (33c) into a concave groove (32e) formed on the outer periphery of a plastic nut (32). The lower end of the is fixed. However, if the slide ring (34) comes into contact with the lower stopper portion (33c) with a strong impact, the stopper mechanism may be damaged (disengaged).

本発明は、マグネットロータの回転をネジ送り機構により弁体の直線運動に変換するとともに、ガイド部に螺合された従動スライダを回転して下端ストッパ部に当接させてマグネットロータの少なくとも下端位置を規制するストッパ機構を備えた電動弁において、ストッパ機構を堅牢にすることを課題とする。   The present invention converts the rotation of the magnet rotor into a linear motion of the valve body by a screw feed mechanism, and rotates the driven slider screwed to the guide portion so as to abut the lower end stopper portion, thereby at least the lower end position of the magnet rotor. It is an object of the present invention to make a stopper mechanism robust in a motor-operated valve including a stopper mechanism for regulating the stopper.

請求項１の電動弁は、電動モータを構成するマグネットロータの回転運動をネジ送り機構により弁体の直線運動に変換し、該弁体を弁ポートに対して進退させて該弁ポートを通る流体の流量を制御する電動弁において、前記マグネットロータの少なくとも下端位置を規制するストッパ機構と、前記マグネットロータのロータ軸を前記弁ポートの軸線上に支持する支持部材と、を備え、前記ストッパ機構は、前記支持部材の外周に螺旋状の軌道を構成するガイド部と、該ガイド部の下端から延在されたに下端ストッパ部と、該下端ストッパ部から延在された係止部と、前記ガイド部に螺合された従動スライダとで構成され、前記支持部材の外周にて、前記係止部の前記軸線回りの回動を阻止するように該係止部を固定するとともに、該係止部の少なくとも一部を外側から覆う被覆固定部材を備えたことを特徴とする。   The electric valve according to claim 1 is a fluid that passes through the valve port by converting the rotational motion of the magnet rotor constituting the electric motor into a linear motion of the valve body by a screw feed mechanism and moving the valve body forward and backward with respect to the valve port. In the motor-operated valve for controlling the flow rate of the magnet rotor, a stopper mechanism that regulates at least the lower end position of the magnet rotor, and a support member that supports the rotor shaft of the magnet rotor on the axis of the valve port, the stopper mechanism includes: A guide portion forming a spiral track on the outer periphery of the support member; a lower end stopper portion extending from a lower end of the guide portion; a locking portion extending from the lower end stopper portion; and the guide A locking slider fixed to the outer periphery of the support member so as to prevent the locking portion from rotating about the axis, and the locking portion. of Even without it characterized by comprising a coating fixation member covering a part from the outside.

請求項２の電動弁は、請求項１に記載の電動弁であって、前記支持部材は、円柱状のホルダ部と、該ホルダ部より径の大きな円柱状の基部とを備え、前記ガイド部は前記ホルダ部の外周に設けられるとともに、前記係止部は、前記支持部材の前記基部の外周に前記軸線と平行な縦軸を有し、前記被覆固定部材は、前記基部の外周に配設され、前記係止部の前記縦軸と前記基部とを覆う円筒状の止め金具で構成されていることを特徴とする。   The motor-driven valve according to claim 2 is the motor-operated valve according to claim 1, wherein the support member includes a columnar holder portion and a columnar base portion having a diameter larger than the holder portion, and the guide portion. Is provided on the outer periphery of the holder portion, the locking portion has a longitudinal axis parallel to the axis on the outer periphery of the base portion of the support member, and the covering fixing member is disposed on the outer periphery of the base portion And is constituted by a cylindrical fastener that covers the longitudinal axis and the base portion of the locking portion.

請求項１の電動弁によれば、被覆固定部材により、この下端ストッパ部から延在された係止部が支持部材に対して固定されているので、ストッパ機構において、マグネットロータとともに従動スライダが回転して、この従動スライダが下端ストッパ部に当接しても、係止部が支持部材から外れることがなく、ストッパ機構が堅牢になる。   According to the motor-driven valve of the first aspect, since the locking portion extending from the lower end stopper portion is fixed to the support member by the covering fixing member, the driven slider rotates together with the magnet rotor in the stopper mechanism. Even when the driven slider comes into contact with the lower end stopper portion, the locking portion does not come off from the support member, and the stopper mechanism becomes robust.

請求項２の電動弁によれば、請求項１の効果に加えて、被覆固定部材が、係止部の縦軸と基部とを覆う円筒状の止め金具で構成されているので、支持部材の基部に対して係止部を確実に固定することができ、ストッパ機構がさらに堅牢になる。   According to the electric valve of the second aspect, in addition to the effect of the first aspect, the covering fixing member is formed of a cylindrical stopper that covers the longitudinal axis and the base portion of the locking portion. The locking portion can be securely fixed to the base portion, and the stopper mechanism is further robust.

本発明の実施形態に係る電動弁の縦断面図である。It is a longitudinal cross-sectional view of the motor operated valve which concerns on embodiment of this invention. 実施形態に係る電動弁のケースとマグネットロータを取り外した状態の側面図である。It is a side view of the state which removed the case and magnet rotor of the motor operated valve concerning an embodiment. 図２におけるＡ−Ａ断面図及び一部拡大図である。It is AA sectional drawing in FIG. 2, and a partial enlarged view.

次に、本発明の電動弁の実施形態を図面を参照して説明する。図１は実施形態に係る電動弁の縦断面図、図２は同電動弁のケースとマグネットロータを取り外した状態の側面図、図３は図２におけるＡ−Ａ断面図及び一部拡大図である。なお、以下の説明における「上下」の概念は図１の図面における上下に対応する。また、「右回り（時計回り）」及び「左回り（反時計回り）」の表現は、電動弁を上から見た状態での回転方向を示す。   Next, an embodiment of the motor-operated valve of the present invention will be described with reference to the drawings. 1 is a longitudinal sectional view of a motor-operated valve according to the embodiment, FIG. 2 is a side view of the motor-operated valve with a case and a magnet rotor removed, and FIG. is there. Note that the concept of “upper and lower” in the following description corresponds to the upper and lower sides in the drawing of FIG. The expressions “clockwise (clockwise)” and “counterclockwise (counterclockwise)” indicate the direction of rotation when the motor-operated valve is viewed from above.

この電動弁は、ステンレスや真鍮等の金属部材のプレス加工や切削加工により形成された弁ハウジング１を有しており、弁ハウジング１はその内側に弁室１Ａを有している。弁ハウジング１の外周片側には弁室１Ａに導通される第１継手管１１が接続されている。また、弁ハウジング１の下端には第２継手管１２が接続されるとともに、弁ハウジング１の内底面には弁ポート１３が形成されており、第２継手管１２は弁ポート１３を介して弁室１Ａに導通される。なお、第１継手管１１及び第２継手管１２は、弁ハウジング１に対してろう付け等により固着されている。   This electric valve has a valve housing 1 formed by pressing or cutting a metal member such as stainless steel or brass, and the valve housing 1 has a valve chamber 1A inside thereof. A first joint pipe 11 connected to the valve chamber 1 </ b> A is connected to one outer peripheral side of the valve housing 1. A second joint pipe 12 is connected to the lower end of the valve housing 1, and a valve port 13 is formed on the inner bottom surface of the valve housing 1. The second joint pipe 12 is connected to the valve port 13 via the valve port 13. Conducted to chamber 1A. The first joint pipe 11 and the second joint pipe 12 are fixed to the valve housing 1 by brazing or the like.

弁ハウジング１の上端開口部には支持部材２が取り付けられている。支持部材２は、合成樹脂製の略円柱状のホルダ部２１と、ホルダ部２１より径の大きな略円柱状の基部２２と、弁ハウジング１の内径と同径の蓋部２３と、この蓋部２３の基部２２寄りにインサート成形により一体に設けられたステンレス製の固定部材２４とを有している。そして、支持部材２は、蓋部２３が弁ハウジング１に嵌合されて、固定部材２４が弁ハウジング１の端部に溶接等により固着されることで、弁ハウジング１に固定されている。   A support member 2 is attached to the upper end opening of the valve housing 1. The support member 2 includes a substantially cylindrical holder portion 21 made of synthetic resin, a substantially cylindrical base portion 22 having a larger diameter than the holder portion 21, a lid portion 23 having the same diameter as the inner diameter of the valve housing 1, and the lid portion. And a fixing member 24 made of stainless steel, which is integrally provided by insert molding, near the base 22 of 23. The support member 2 is fixed to the valve housing 1 by fitting the lid portion 23 to the valve housing 1 and fixing the fixing member 24 to the end of the valve housing 1 by welding or the like.

ホルダ部２１の中心には、弁ポート１３の軸線Ｌと同軸の雌ネジ部２１ａとそのネジ孔が形成され、基部２２と蓋部２３には雌ネジ部２１ａのネジ孔の外周よりも径の大きな円筒状のスライド孔２５が形成されている。そして、雌ネジ部２１ａのネジ孔とスライド孔２５の中に円柱棒状のロータ軸３が配設されている。   In the center of the holder portion 21, a female screw portion 21a coaxial with the axis L of the valve port 13 and a screw hole thereof are formed. The base portion 22 and the lid portion 23 have a diameter larger than the outer periphery of the screw hole of the female screw portion 21a. A large cylindrical slide hole 25 is formed. A cylindrical rod-shaped rotor shaft 3 is disposed in the screw hole and the slide hole 25 of the female screw portion 21a.

ロータ軸３の外周には雄ネジ部３ａが形成されており、この雄ネジ部３ａはホルダ部２１の雌ネジ部２１ａに螺合されている。なお、雌ネジ部２１ａと雄ネジ部３ａは右ネジである。   A male screw portion 3 a is formed on the outer periphery of the rotor shaft 3, and this male screw portion 3 a is screwed into the female screw portion 21 a of the holder portion 21. The female screw portion 21a and the male screw portion 3a are right-hand screws.

スライド孔２５には弁体部４が配設されている。弁体部４は、スライド孔２５に嵌合する円筒状の弁ホルダ４１を有しており、これにより弁体部４は軸線Ｌ方向に摺動可能に支持されている。弁ホルダ４１は弁室１Ａと同軸に取り付けられ、この弁ホルダ４１の弁ポート１３側の下端部には端部がニードル状の弁体４２が固着されている。   The valve body 4 is disposed in the slide hole 25. The valve body 4 has a cylindrical valve holder 41 that fits into the slide hole 25, and the valve body 4 is supported so as to be slidable in the direction of the axis L. The valve holder 41 is attached coaxially with the valve chamber 1A, and a valve body 42 having a needle-like end is fixed to the lower end portion of the valve holder 41 on the valve port 13 side.

弁ホルダ４１はロータ軸３に係合している。すなわち、ロータ軸３の下端部にはフランジ部３ｂが一体形成され、このフランジ部３ｂが弁ホルダ４１の上端部と共にワッシャ４３を挟み込み、ロータ軸３の下端部は弁ホルダ４１の上端部で回転可能に係合している。この係合により、弁体部４がロータ軸３によって回転可能に吊り下げた状態で支持されている。また、弁ホルダ４１内には、バネ受け４４が軸線Ｌ方向に移動可能に設けられている。バネ受け４４と弁体４２との間には圧縮コイルバネ４５が所定の荷重を与えられた状態で取り付けられている。これにより、バネ受け４４はロータ軸３の下端部に当接している。   The valve holder 41 is engaged with the rotor shaft 3. That is, a flange portion 3 b is integrally formed at the lower end portion of the rotor shaft 3, and this flange portion 3 b sandwiches the washer 43 together with the upper end portion of the valve holder 41, and the lower end portion of the rotor shaft 3 rotates at the upper end portion of the valve holder 41. Engagement possible. By this engagement, the valve body 4 is supported in a state of being rotatably suspended by the rotor shaft 3. A spring receiver 44 is provided in the valve holder 41 so as to be movable in the direction of the axis L. A compression coil spring 45 is attached between the spring receiver 44 and the valve body 42 with a predetermined load applied. Thereby, the spring receiver 44 is in contact with the lower end portion of the rotor shaft 3.

支持部材２のホルダ部２１の外周には、「ストッパ機構」を構成するストッパガイド部材５が配設されている。ストッパガイド部材５は、金属線材の曲げ加工により形成され、軸線Ｌ回りに螺旋状の軌道を構成するガイド部５１と、ガイド部５１の上端にて軸線Ｌと平行に曲げられた上端ストッパ部５２と、ガイド部５１の下端にて軸線Ｌと平行に曲げられた下端ストッパ部５３と、下端ストッパ部５３から基部２２に倣って軸線Ｌと垂直向きの半径方向外側に延在された係止部５４とを有している。ストッパガイド部材５の係止部５４は、支持部材２の基部２２の外周に軸線Ｌと平行な縦軸５４ａとこの縦軸５４ａから直角に外側に突出する横軸５４ｂとを有している。   A stopper guide member 5 constituting a “stopper mechanism” is disposed on the outer periphery of the holder portion 21 of the support member 2. The stopper guide member 5 is formed by bending a metal wire, and includes a guide portion 51 that forms a spiral track around the axis L, and an upper end stopper portion 52 that is bent in parallel with the axis L at the upper end of the guide portion 51. And a lower end stopper portion 53 bent in parallel with the axis L at the lower end of the guide portion 51, and a locking portion extending from the lower end stopper portion 53 to the outside in the radial direction perpendicular to the axis L following the base portion 22. 54. The locking portion 54 of the stopper guide member 5 has a vertical axis 54a parallel to the axis L on the outer periphery of the base portion 22 of the support member 2 and a horizontal axis 54b protruding outward from the vertical axis 54a at a right angle.

また、ホルダ部２１の外周には、ストッパガイド部材５のガイド部５１の軌道に嵌合するように「ストッパ機構」を構成するコイル状の従動スライダ６が螺合されている。従動スライダ６は、ばね性を有する金属線材の曲げ加工により形成されており、半径方向外向きに突出する爪部６１を有している。なお、ガイド部５１と従動スライダ６は右ネジであり、このガイド部５１のピッチは雌ネジ部２１ａのピッチよりも大きく設定されている。   In addition, a coiled driven slider 6 constituting a “stopper mechanism” is screwed onto the outer periphery of the holder portion 21 so as to be fitted to the track of the guide portion 51 of the stopper guide member 5. The driven slider 6 is formed by bending a metal wire having spring properties, and has a claw portion 61 protruding outward in the radial direction. The guide 51 and the driven slider 6 are right-handed screws, and the pitch of the guide 51 is set larger than the pitch of the female screw 21a.

支持部材２の基部２２の外周には、ストッパガイド部材５の係止部５４と基部２２とを覆うように、略円筒状の「被覆固定部材」としての後述の止め金具７が配設されている。   On the outer periphery of the base portion 22 of the support member 2, a later-described stopper 7 as a substantially cylindrical “cover fixing member” is disposed so as to cover the locking portion 54 and the base portion 22 of the stopper guide member 5. Yes.

弁ハウジング１の上端には、ステッピングモータ８のケース８１が溶接等によって気密に固定されている。このステッピングモータ８は「電動モータ」の一例である。ケース８１内には外周部を多極に着磁されたマグネットロータ８２が回転可能に設けられている。また、ケース８１の外周には、ステータコイル８３が配設されており、このステッピングモータ８は、ステータコイル８３にパルス信号が与えられることにより、そのパルス数に応じてマグネットロータ８２を回転させる。   A case 81 of the stepping motor 8 is airtightly fixed to the upper end of the valve housing 1 by welding or the like. This stepping motor 8 is an example of an “electric motor”. A magnet rotor 82 whose outer peripheral portion is magnetized in multiple poles is rotatably provided in the case 81. A stator coil 83 is disposed on the outer periphery of the case 81. The stepping motor 8 rotates the magnet rotor 82 in accordance with the number of pulses when a pulse signal is given to the stator coil 83.

マグネットロータ８２は磁性粉を混入した母材を型成形したものであり、その中央に固定金具８２１がインサート成形により一体に設けられている。マグネットロータ８２は、この固定金具８２１によりロータ軸３に溶接等により固着されている。また、マグネットロータ８２は略円筒状の形状をしており、その内周面の一部には軸線Ｌと平行な突条８２ａが形成されている。   The magnet rotor 82 is formed by molding a base material mixed with magnetic powder, and a fixed fitting 821 is integrally provided at the center thereof by insert molding. The magnet rotor 82 is fixed to the rotor shaft 3 by welding or the like with the fixing bracket 821. The magnet rotor 82 has a substantially cylindrical shape, and a protrusion 82a parallel to the axis L is formed on a part of the inner peripheral surface thereof.

なお、この実施形態の電動弁は概略以下のように組み立てる。ます、ロータ軸３と弁体部４とを組み付ける。ストッパガイド部材５の横軸５４ｂを止め金具７に係合させた状態で、止め金具７とストッパガイド部材５を支持部材２に組み付け、従動スライダ６を組み付ける。この組み付けた支持部材２に対して、上記ロータ軸３及び弁体部４を組み付ける。そして、この組み付けられたものを、弁ハウジング１に取り付け、ロータ軸３の上端にマグネットロータ８２を固着し、ケース８１を取り付けてステッピングモータ８を組み付ける。   The motor-operated valve according to this embodiment is assembled as follows. First, the rotor shaft 3 and the valve body 4 are assembled. With the horizontal shaft 54 b of the stopper guide member 5 engaged with the stopper 7, the stopper 7 and the stopper guide member 5 are assembled to the support member 2 and the driven slider 6 is assembled. The rotor shaft 3 and the valve body 4 are assembled to the assembled support member 2. The assembled assembly is attached to the valve housing 1, the magnet rotor 82 is fixed to the upper end of the rotor shaft 3, the case 81 is attached, and the stepping motor 8 is assembled.

以上の構成により、マグネットロータ８２の回転によってロータ軸３が回転し、ロータ軸３の雄ネジ部３ａと支持部材２の雌ネジ部２１ａのネジ送り作用により、ロータ軸３が軸Ｌ方向（上下）に移動して弁体４２（ニードル部）が弁ポート１３に対して進退する。これにより、弁ポート１３の開度を変化させ、第１継手管１１から第２継手管１２へ流れる冷媒の流量、または第２継手管１２から第１継手管１１へ流れる冷媒の流量が制御される。なお、支持部材２の基部２２には均圧孔２２ａが形成されており、ケース８１内は弁室１Ａと常時同圧にされる。また、弁ばね４６は弁体４２が弁ポート１３の周囲（弁座）に当接するときに収縮して緩衝作用をする。   With the above configuration, the rotor shaft 3 is rotated by the rotation of the magnet rotor 82, and the rotor shaft 3 is moved in the axis L direction (up and down) by the screw feeding action of the male screw portion 3 a of the rotor shaft 3 and the female screw portion 21 a of the support member 2. ) And the valve body 42 (needle part) moves forward and backward with respect to the valve port 13. Thereby, the opening degree of the valve port 13 is changed, and the flow rate of the refrigerant flowing from the first joint pipe 11 to the second joint pipe 12 or the flow rate of the refrigerant flowing from the second joint pipe 12 to the first joint pipe 11 is controlled. The A pressure equalizing hole 22a is formed in the base portion 22 of the support member 2, and the inside of the case 81 is always at the same pressure as the valve chamber 1A. The valve spring 46 contracts when the valve body 42 comes into contact with the periphery (valve seat) of the valve port 13 to provide a buffering action.

また、マグネットロータ８２の回転時に、突条８２ａは従動スライダ６の爪部６１に当接し、このマグネットロータ８２の回転に伴って従動スライダ６を同方向に連れ回すように回転させる。これにより、ストッパガイド部材５のガイド部５１に倣って従動スライダ６が旋回しながらロータ軸３と同方向に上下動する。この上下動によって従動スライダ６が、ストッパガイド部材５の上端側の上端ストッパ部５２、あるいはストッパガイド部材５の下端側の下端ストッパ部５３に当接する。これによって、ロータ軸３及び弁体部４が上端位置あるいは下端位置で停止する。   Further, when the magnet rotor 82 rotates, the protrusion 82a contacts the claw portion 61 of the driven slider 6 and rotates the driven slider 6 in the same direction as the magnet rotor 82 rotates. Thereby, the driven slider 6 moves up and down in the same direction as the rotor shaft 3 while turning along the guide portion 51 of the stopper guide member 5. By this vertical movement, the driven slider 6 contacts the upper end stopper portion 52 on the upper end side of the stopper guide member 5 or the lower end stopper portion 53 on the lower end side of the stopper guide member 5. As a result, the rotor shaft 3 and the valve body 4 stop at the upper end position or the lower end position.

支持部材２の基部２２の外周に配設された前記止め金具７は、図２に示すように、円筒部７１と、この円筒部７１から外側に膨出したカバー部７２と、円筒部７１の下端外周に形成されたフランジ部７３とを有しており、カバー部７２には係止孔７２ａが形成されている。そして、円筒部７１が基部２２に嵌合され、ストッパガイド部材５の係止部５４の縦軸５４ａがカバー部７２で覆われ、係止部５４の横軸５４ｂがカバー部７２の係止孔７２ａ内に係止されている。また、止め金具７は、フランジ部７３を支持部材２の固定部材２４に対して溶接等により固着されている。   As shown in FIG. 2, the stopper 7 disposed on the outer periphery of the base portion 22 of the support member 2 includes a cylindrical portion 71, a cover portion 72 bulging outward from the cylindrical portion 71, and the cylindrical portion 71. It has a flange portion 73 formed on the outer periphery of the lower end, and a locking hole 72 a is formed in the cover portion 72. The cylindrical portion 71 is fitted to the base portion 22, the vertical axis 54 a of the locking portion 54 of the stopper guide member 5 is covered with the cover portion 72, and the horizontal axis 54 b of the locking portion 54 is locked to the locking hole of the cover portion 72. It is locked in 72a. Further, the fastener 7 has the flange portion 73 fixed to the fixing member 24 of the support member 2 by welding or the like.

このように、ストッパガイド部材５の係止部５４が止め金具７によって、基部２２に対して締結して固定されているため、従動スライダ６が下端ストッパ部５３に衝突しても、その衝撃に耐えて、ストッパガイド部材５の係止部５４が基部２２から外れることがない。また、係止部５４の横軸５４ｂが５４ｂ係止孔７２ａ内に係止されているので、ストッパガイド部材５が支持部材２に対して軸線Ｌ方向にずれることも防止できる。   As described above, since the locking portion 54 of the stopper guide member 5 is fastened and fixed to the base portion 22 by the stopper 7, even if the driven slider 6 collides with the lower end stopper portion 53, it is not affected. Withstand, the locking portion 54 of the stopper guide member 5 does not come off the base portion 22. Further, since the horizontal shaft 54b of the locking portion 54 is locked in the 54b locking hole 72a, it is possible to prevent the stopper guide member 5 from being displaced in the axis L direction with respect to the support member 2.

なお、図３（Ａ）、（Ｂ）に示すように、この実施形態における止め金具７は、ストッパガイド部材５の係止部５４の縦軸５４ａに対して、カバー部７２が軸線Ｌ回りの周方向で密着しているので、この係止部５４（すなわちストッパガイド部５）の回動が阻止されている。この構成を有していれば、半径方向については、カバー部７２と係止部５４との間に多少の隙間があってもよい。また、実施形態では、カバー部７２は係止部５４の全てを覆う形状となっているが、このカバー部７２は少なくとも係止部５４の一部を覆う形状であってもよい。   As shown in FIGS. 3A and 3B, the stopper 7 in this embodiment has a cover portion 72 around the axis L with respect to the longitudinal axis 54 a of the locking portion 54 of the stopper guide member 5. Since the contact is made in the circumferential direction, the locking portion 54 (that is, the stopper guide portion 5) is prevented from rotating. If it has this configuration, there may be a slight gap between the cover portion 72 and the locking portion 54 in the radial direction. Further, in the embodiment, the cover portion 72 has a shape that covers the entire locking portion 54, but the cover portion 72 may have a shape that covers at least a part of the locking portion 54.

以上の実施形態では、「被覆固定部材」としての止め金具７は略円筒状の形状をしているが、この被覆固定部材は、ストッパガイド部材５の係止部５４を基部２２に対して固定できるような部材であれば、その形状は実施形態のものに限らない。例えばリング状の形状でもよい。   In the above embodiment, the stopper 7 as the “cover fixing member” has a substantially cylindrical shape, but this cover fixing member fixes the locking portion 54 of the stopper guide member 5 to the base portion 22. The shape is not limited to that of the embodiment as long as the member can be used. For example, a ring shape may be used.

以上、本発明の実施の形態について図面を参照して詳述してきたが、具体的な構成はこれらの実施の形態に限られるものではなく、本発明の要旨を逸脱しない範囲の設計の変更等があっても本発明に含まれる。   As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to these embodiments, and the design can be changed without departing from the scope of the present invention. Is included in the present invention.

１ 弁ハウジング
１Ａ 弁室
１１ 第１継手管
１２ 第２継手管
１３ 弁ポート
２ 支持部材
２１ ホルダ部
２１ａ 雌ネジ部
２２ 基部
３ ロータ軸
３ａ 雄ネジ部
４ 弁体部
４１ 弁ホルダ
４２ 弁体
５ ストッパガイド部材（ストッパ機構）
５１ ガイド部
５２ 上端ストッパ部
５３ 下端ストッパ部
５４ 係止部
５４ａ 縦軸
５４ｂ 横軸
６ 従動スライダ（ストッパ機構）
６１ 爪部
７ 止め金具（被覆固定部材）
７１ 円筒部
７２ カバー部
７３ フランジ部
７２ａ 係止孔
８ ステッピングモータ（電動モータ）
８２ マグネットロータ
８２ａ 突条
Ｌ 軸線 DESCRIPTION OF SYMBOLS 1 Valve housing 1A Valve chamber 11 1st joint pipe 12 2nd joint pipe 13 Valve port 2 Support member 21 Holder part 21a Female thread part 22 Base part 3 Rotor shaft 3a Male thread part 4 Valve body part 41 Valve holder 42 Valve body 5 Stopper Guide member (stopper mechanism)
51 Guide part 52 Upper end stopper part 53 Lower end stopper part 54 Locking part 54a Vertical axis 54b Horizontal axis 6 Driven slider (stopper mechanism)
61 Claw 7 Stopper (Coating Fixing Member)
71 Cylindrical part 72 Cover part 73 Flange part 72a Locking hole 8 Stepping motor (electric motor)
82 Magnet rotor 82a Projection L

Claims (2)

電動モータを構成するマグネットロータの回転運動をネジ送り機構により弁体の直線運動に変換し、該弁体を弁ポートに対して進退させて該弁ポートを通る流体の流量を制御する電動弁において、
前記マグネットロータの少なくとも下端位置を規制するストッパ機構と、
前記マグネットロータのロータ軸を前記弁ポートの軸線上に支持する支持部材と、を備え、
前記ストッパ機構は、前記支持部材の外周に螺旋状の軌道を構成するガイド部と、該ガイド部の下端から延在されたに下端ストッパ部と、該下端ストッパ部から延在された係止部と、前記ガイド部に螺合された従動スライダとで構成され、
前記支持部材の外周にて、前記係止部の前記軸線回りの回動を阻止するように該係止部を固定するとともに、該係止部の少なくとも一部を外側から覆う被覆固定部材を備えたことを特徴とする電動弁。 In an electric valve for controlling the flow rate of fluid passing through the valve port by converting the rotary motion of the magnet rotor constituting the electric motor into a linear motion of the valve body by a screw feed mechanism and moving the valve body forward and backward with respect to the valve port ,
A stopper mechanism for regulating at least the lower end position of the magnet rotor;
A support member that supports the rotor shaft of the magnet rotor on the axis of the valve port;
The stopper mechanism includes a guide portion that forms a spiral track on the outer periphery of the support member, a lower end stopper portion that extends from the lower end of the guide portion, and a locking portion that extends from the lower end stopper portion. And a driven slider screwed to the guide portion,
A covering fixing member that fixes the locking portion so as to prevent rotation of the locking portion around the axis on the outer periphery of the support member, and covers at least a part of the locking portion from the outside. An electric valve characterized by that. 前記支持部材は、円柱状のホルダ部と、該ホルダ部より径の大きな円柱状の基部とを備え、
前記ガイド部は前記ホルダ部の外周に設けられるとともに、前記係止部は、前記支持部材の前記基部の外周に前記軸線と平行な縦軸を有し、
前記被覆固定部材は、前記基部の外周に配設され、前記係止部の前記縦軸と前記基部とを覆う円筒状の止め金具で構成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 support member includes a columnar holder portion and a columnar base portion having a larger diameter than the holder portion,
The guide portion is provided on the outer periphery of the holder portion, and the locking portion has a vertical axis parallel to the axis on the outer periphery of the base portion of the support member,
The said covering fixing member is arrange | positioned by the outer periphery of the said base, and is comprised with the cylindrical fastener which covers the said longitudinal axis and the said base of the said latching | locking part. Motorized valve.
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