JP7090041B2 - Solenoid valve stator and solenoid valve - Google Patents

Solenoid valve stator and solenoid valve Download PDF

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Publication number
JP7090041B2
JP7090041B2 JP2019015738A JP2019015738A JP7090041B2 JP 7090041 B2 JP7090041 B2 JP 7090041B2 JP 2019015738 A JP2019015738 A JP 2019015738A JP 2019015738 A JP2019015738 A JP 2019015738A JP 7090041 B2 JP7090041 B2 JP 7090041B2
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stator
valve
open space
annular wall
axis
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JP2020124067A (en
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琢郎 土井
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Saginomiya Seisakusho Inc
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Saginomiya Seisakusho Inc
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Priority to JP2019015738A priority Critical patent/JP7090041B2/en
Priority to CN202010036844.7A priority patent/CN111509872B/en
Priority to CN202210774980.5A priority patent/CN114977550A/en
Publication of JP2020124067A publication Critical patent/JP2020124067A/en
Priority to JP2022043339A priority patent/JP7288531B2/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Motor Or Generator Frames (AREA)

Description

本発明は、空気調和機等の冷凍サイクルシステムなどに使用する電動弁用ステータ及びそれを備えた電動弁に関する。 The present invention relates to a stator for an electric valve used in a refrigeration cycle system such as an air conditioner and an electric valve provided with the stator.

従来、この種の電動弁として、ステッピングモータ等のモータ部のマグネットロータの回転により弁本体内の弁部材を作動させるものがある。このような電動弁では流体の流路を密閉する必要があり、弁本体と共に密閉構造をなす円筒形状のキャン内に、モータ部のマグネットロータを収容している。そして、モータ部のステータはキャンの外周に配置する構造となっている。また、例えば特開２０１４－５２０３７号公報（特許文献１）に同様な電動弁が開示されており、ステータは、ボビンとコイルをケース本体（外装カバー）で覆い、このケース本体内に注型樹脂を充填固化させた構造となっている。 Conventionally, as an electric valve of this type, there is one that operates a valve member in a valve body by rotation of a magnet rotor of a motor portion such as a stepping motor. In such an electric valve, it is necessary to seal the fluid flow path, and the magnet rotor of the motor portion is housed in a cylindrical can that forms a closed structure together with the valve body. The stator of the motor unit is arranged on the outer periphery of the can. Further, for example, Japanese Patent Application Laid-Open No. 2014-52037 (Patent Document 1) discloses a similar electric valve, in which a stator covers a bobbin and a coil with a case body (exterior cover), and a casting resin is formed in the case body. It has a structure in which is filled and solidified.

特開２０１４－５２０３７号公報Japanese Unexamined Patent Publication No. 2014-52037

従来の電動弁のように、ケース本体（外装ケース）内に注型樹脂を注型するものにあっては、この樹脂の注型時に、溶融した樹脂が不要な部位に侵入すると不具合が生じる。例えば、特許文献１のものでは、ステータに対する弁本体の振動防止のために、ステータの下部に固定金具を設けるようにしているが、この固定金具とボビンとの隙間に樹脂が侵入し、毛細管現象により、ステータ内径側まで流動し、固化してしまうと、弁本体への装着不良が出たり、弁本体の振動防止を確実に行うことができないことがある。 In the case of a conventional motorized valve in which a casting resin is cast into a case body (exterior case), a problem occurs if the molten resin invades an unnecessary portion during casting of this resin. For example, in Patent Document 1, in order to prevent vibration of the valve body with respect to the stator, a fixing bracket is provided at the lower part of the stator. However, resin penetrates into the gap between the fixing bracket and the bobbin, and a capillary phenomenon occurs. As a result, if it flows to the inner diameter side of the stator and solidifies, it may not be properly attached to the valve body or vibration of the valve body may not be reliably prevented.

本発明は、弁装置のマグネットロータとともにモータ部を構成するとともに、注型樹脂を封入する電動弁用ステータにおいて、樹脂の注型時に、溶融した樹脂が不要な部位に侵入するのを防止することを課題とする。 INDUSTRIAL APPLICABILITY The present invention comprises a motor unit together with a magnet rotor of a valve device, and prevents the molten resin from invading an unnecessary portion when the resin is cast in a stator for an electric valve that encloses the casting resin. Is the subject.

請求項１の電動弁用ステータは、モータ部の駆動により作動する弁装置に対して装着され、コイルを内装し、前記弁装置側のマグネットロータと共に前記モータ部を構成する電動弁用ステータであって、前記コイルが巻装されるとともに該コイルの軸線方向に前記弁装置を嵌め込む嵌挿孔を有するボビンと、前記ボビン及び前記コイルを覆う外装カバーと、前記ボビン及び前記コイルと前記外装カバーとの間に充填された注型樹脂部と、前記ボビンの前記嵌挿孔の開口部の前記軸線回りの周囲に形成された環状壁部と、前記注型樹脂部側から前記嵌挿孔まで少なくとも一部が前記環状壁部を跨いで配置されて当該電動弁用ステータと前記弁装置との固定に寄与する固定用金具とを備え、前記外装カバーの開口端の全周及び前記環状壁部の全周は、前記注型樹脂部よりも前記軸線方向の前記固定用金具側に突出して形成されており、前記固定用金具は、前記環状壁部の内側に配置される内側板と、前記環状壁部の外側に配置される外側板と、を含み、前記外側板の端部は、前記注型樹脂部に接触した状態で配置され、前記環状壁部の前記固定用金具が跨ぐ部分には開放空間部が形成されており、前記開放空間部の周方向の幅は、前記固定用金具の前記軸線回りの略周方向の幅と同等以上の幅に形成されていることを特徴とする。 The electric valve stator according to claim 1 is an electric valve stator that is attached to a valve device that is operated by driving a motor unit, has a coil inside, and constitutes the motor unit together with a magnet rotor on the valve device side. A bobbin having a fitting hole for winding the coil and fitting the valve device in the axial direction of the coil, an exterior cover covering the bobbin and the coil, and the bobbin and the coil and the exterior cover. A casting resin portion filled between the bobbin, an annular wall portion formed around the axis of the opening of the fitting hole of the bobbin, and the casting resin portion side to the fitting hole. At least a part thereof is provided so as to straddle the annular wall portion and includes a fixing metal fitting that contributes to fixing the electric valve stator and the valve device, and the entire circumference of the opening end of the exterior cover and the annular wall portion. The entire circumference of the metal fitting is formed so as to project toward the fixing metal fitting in the axial direction from the casting resin portion, and the fixing metal fitting has an inner plate arranged inside the annular wall portion and the inner plate. Including an outer plate arranged on the outside of the annular wall portion, the end portion of the outer plate portion is arranged in contact with the casting resin portion, and is placed on a portion of the annular wall portion where the fixing metal fitting straddles . Is characterized in that an open space portion is formed, and the width in the circumferential direction of the open space portion is formed to be equal to or larger than the width in the circumferential direction around the axis of the fixing metal fitting. do.

請求項２のデータの電動弁用ステータは、請求項１に記載の電動弁用ステータであって、前記固定用金具は、前記弁装置と係合する弾性片と、前記環状壁部の一部に形成された固定ブロックに固定される基部とを有し、前記開放空間部が前記固定ブロックと前記基部との何れか一方または両方に設けられていることを特徴とする。 The motorized valve stator according to claim 2 is the motorized valve stator according to claim 1, wherein the fixing metal fitting is an elastic piece that engages with the valve device and a part of the annular wall portion. It has a base portion fixed to the fixed block formed in the above, and the open space portion is provided on either one or both of the fixed block and the base portion.

請求項３の電動弁用ステータは、前記開放空間部が前記固定ブロックに形成された請求項２に記載の電動弁用ステータであって、前記固定ブロックの前記軸線方向の端面で前記基部に対向する一部に前記軸線回りの略周方向に溝が形成され、前記溝が前記開放空間部を構成していることを特徴とする。 The motorized valve stator according to claim 3 is the motorized valve stator according to claim 2, wherein the open space portion is formed in the fixed block, and faces the base portion at the axial end surface of the fixed block. It is characterized in that a groove is formed in a part thereof in a substantially circumferential direction around the axis, and the groove constitutes the open space portion.

請求項４の電動弁用ステータは、前記開放空間部が前記基部に形成された請求項２に記載の電動弁用ステータであって、前記基部の前記固定ブロックの前記軸線方向の端面に対向する部位に、前記軸線回りの略周方向に凹部が形成され、前記凹部が前記開放空間部を構成していることを特徴とする。 The motorized valve stator according to claim 4 is the motorized valve stator according to claim 2, wherein the open space portion is formed in the base portion, and faces the end surface of the fixed block of the base portion in the axial direction. A recess is formed in the portion in a substantially circumferential direction around the axis, and the recess constitutes the open space portion.

請求項５の電動弁用ステータは、請求項２に記載の電動弁用ステータであって、前記固定ブロックの前記基部に対向する一部に形成された溝が前記開放空間部を構成していることを特徴とする。 The solenoid for an electric valve according to claim 5 is the stator for an electric valve according to claim 2, and a groove formed in a part of the fixed block facing the base portion constitutes the open space portion. It is characterized by that.

請求項６の電動弁用ステータは、請求項３に記載の電動弁用ステータであって、前記基部の前記軸線回りの略周方向の幅が前記溝の前記軸線回りの略周方向の幅内に内包されることを特徴とする。 The motorized valve stator according to claim 6 is the motorized valve stator according to claim 3, wherein the width of the base in the substantially circumferential direction around the axis is within the width of the groove in the substantially circumferential direction. It is characterized by being contained in.

請求項７の電動弁は、請求項１乃至６のいずれか一項に記載の電動弁用ステータを前記弁装置に備えてなることを特徴とする。 The motorized valve according to claim 7 is characterized in that the valve device is provided with the stator for electric valve according to any one of claims 1 to 6.

請求項１乃至６の電動弁用ステータによれば、環状壁部の固定用金具が跨ぐ部分と当該固定用金具との間に、注型樹脂部の一部が流れる隙間が設けられ、当該隙間の途中には、固定用金具の軸線回りの略周方向の幅と同等以上の幅の開放空間部が形成されており、当該開放空間部は、注型樹脂部の一部の流動を途絶えさせることができるので、注型樹脂部の注型時に、溶融した樹脂が環状壁部と固定用金具との隙間において毛細管現象により流動しても、その樹脂の流れは開放空間部を超えることがなく、注型樹脂部の一部が、弁装置を嵌め込む嵌挿孔側に形成されることがない。 According to the stators for electric valves according to claims 1 to 6, a gap through which a part of the cast resin portion flows is provided between the portion of the annular wall portion where the fixing bracket straddles and the fixing bracket, and the gap is provided. In the middle of the above, an open space portion having a width equal to or larger than the width in the circumferential direction around the axis of the fixing metal fitting is formed, and the open space portion interrupts the flow of a part of the casting resin portion. Therefore , even if the molten resin flows due to the capillary phenomenon in the gap between the annular wall portion and the fixing metal fitting during casting of the casting resin portion, the flow of the resin exceeds the open space portion. No part of the casting resin portion is formed on the fitting / insertion hole side into which the valve device is fitted.

請求項７の電動弁によれば、請求項１乃至６と同様な効果が得られる。 According to the electric valve of claim 7, the same effect as that of claims 1 to 6 can be obtained.

本発明の実施形態の電動弁の一部断面側面図である。It is a partial cross-sectional side view of the electric valve of the embodiment of this invention. 実施形態の電動弁用ステータの縦断面図及び底面図である。It is the vertical sectional view and the bottom view of the stator for electric valve of embodiment. 図２（Ａ）の要部拡大図である。It is an enlarged view of the main part of FIG. 2A. 実施形態におけるブラケットとキャンとの係合状態を示す図である。It is a figure which shows the engaging state of a bracket and a can in an embodiment. 実施形態の電動弁用ステータの変形例１を示す要部拡大図である。It is an enlarged view of the main part which shows the modification 1 of the stator for electric valve of embodiment. 実施形態の電動弁用ステータの変形例２を示す要部拡大図である。It is an enlarged view of the main part which shows the modification 2 of the stator for electric valve of embodiment. 実施形態の電動弁用ステータの変形例３を示す要部拡大図である。It is an enlarged view of the main part which shows the modification 3 of the stator for electric valve of embodiment.

次に、本発明の電動弁用ステータ及び電動弁の実施形態について図面を参照して説明する。図１は実施形態の電動弁の一部断面側面図、図２は実施形態の電動弁用ステータの縦断面図及び底面図であり、図２（Ｂ）は図１の注型前のＡ－Ａ断面図、図２（Ａ）は図２（Ｂ）の注型後のＢ－Ｂ断面図である。図３は図２（Ａ）の要部拡大図、図４は実施形態におけるブラケットとキャンとの係合状態を示す図である。なお、以下の説明における「上下」の概念は図１及び図２（Ａ）の図面における上下に対応する。 Next, the stator for the motorized valve and the embodiment of the motorized valve of the present invention will be described with reference to the drawings. 1 is a partial cross-sectional side view of the motor-operated valve of the embodiment, FIG. 2 is a vertical cross-sectional view and a bottom view of the stator for the motor-operated valve of the embodiment, and FIG. A cross-sectional view, FIG. 2 (A) is a cross-sectional view taken along the line BB after casting of FIG. 2 (B). FIG. 3 is an enlarged view of a main part of FIG. 2A, and FIG. 4 is a diagram showing an engaged state between the bracket and the can in the embodiment. The concept of "upper and lower" in the following description corresponds to the upper and lower parts in the drawings of FIGS. 1 and 2 (A).

図１及び図２に示すように、この電動弁は、「電動弁用ステータ」としてのステータ２１と、「モータ部」としてのステッピングモータ２０と、弁本体３０と、非磁性体からなる円筒形状のキャン４０とを備えている。ステッピングモータ２０は、キャン４０の外周に取り付けられたステータ２１とキャン４０の内部に回転可能に配設されたマグネットロータ２２とで構成されている。なお、マグネットロータ２２の外周面とキャン４０の内周面との間には所定の隙間が設けられている。 As shown in FIGS. 1 and 2, the solenoid valve has a cylindrical shape composed of a stator 21 as a "solenoid valve stator", a stepping motor 20 as a "motor unit", a valve body 30, and a non-magnetic material. It is equipped with a can 40. The stepping motor 20 includes a stator 21 attached to the outer periphery of the can 40 and a magnet rotor 22 rotatably arranged inside the can 40. A predetermined gap is provided between the outer peripheral surface of the magnet rotor 22 and the inner peripheral surface of the can 40.

弁本体３０はステンレス等のハウジング３１０を有し、このハウジング３１０の内部に弁部材等を内蔵している。そして、この弁本体３０はステッピングモータ２０の駆動（マグネットロータ２２の回転）により作動し、第１継手管３１から第２継手管３２へ流れる流体の流量、または第２継手管３２から第１継手管３１へ流れる流体の流量を制御する。 The valve body 30 has a housing 310 made of stainless steel or the like, and a valve member or the like is built in the housing 310. The valve body 30 is operated by driving the stepping motor 20 (rotation of the magnet rotor 22), and the flow rate of the fluid flowing from the first joint pipe 31 to the second joint pipe 32 or the flow rate of the fluid from the second joint pipe 32 to the first joint. The flow rate of the fluid flowing to the pipe 31 is controlled.

弁本体３０のハウジング３１０の上端には、キャン４０が溶接等によって気密に組み付けられ、これにより、弁本体３０及びキャン４０は「弁装置」を構成している。 A can 40 is airtightly assembled to the upper end of the housing 310 of the valve body 30 by welding or the like, whereby the valve body 30 and the can 40 form a “valve device”.

ステータ２１は、コイル２１ｂ，２１ｂを巻装した樹脂製のボビン２１ａと、ボビン２１ａ及びコイル２１ｂ，２１ｂを覆う外装カバー２１Ｃと、ボビン２１ａ及びコイル２１ｂ，２１ｂと外装カバー２１Ｃとの間に充填された注型樹脂部２１Ｄと、「固定金具」としてのブラケット１と、を備えている。ボビン２１ａは、コイル２１ｂ，２１ｂの軸線Ｌ方向に前記「弁装置」のキャン４０を嵌め込むための軸線Ｌを中心とする円柱形状の嵌挿孔２１Ｈを有している。また、ボビン２１ａの弁本体３０側の底部には、嵌挿孔２１Ｈの開口部２１Ｈ１から弁本体３０側に拡径された「環状壁部」としての袴部２１Ｋを有している。この袴部２１Ｋは、嵌挿孔２１Ｈの開口部の軸線Ｌ回りの周囲に形成されるとともに、この袴部２１Ｋは注型樹脂部２１Ｄよりも軸線Ｌ方向の下側に突出して形成されている。実際、ステータ２１の注型時は、図２（Ａ）において、上下逆さの姿勢で注型樹脂を流し、外装カバー２１Ｃと袴部２１Ｋの上端部から溢れない樹脂量を充填し、固化させている為、この様に構成されている。そして、ブラケット１は、注型樹脂部２１Ｄ側から嵌挿孔２１Ｈまで袴部２１Ｋ（環状壁部）の一部を跨いで配置されている。なお、ボビン２１ａには、磁極歯２１ｄを持つ継鉄（ヨーク）２１ｃがモールド成形により一体に組み付けられており、嵌挿孔２１Ｈの内周面の一部に継鉄２１ｃの磁極歯２１ｄが配置されている。そして、この磁極歯２１ｄはキャン４０の外周面に対向配置されている。 The stator 21 is filled between the resin bobbin 21a wound with the coils 21b and 21b, the exterior cover 21C covering the bobbin 21a and the coils 21b and 21b, and the bobbin 21a and the coils 21b and 21b and the exterior cover 21C. It is provided with a cast resin portion 21D and a bracket 1 as a "fixing bracket". The bobbin 21a has a cylindrical fitting hole 21H centered on the axis L for fitting the can 40 of the "valve device" in the axis L direction of the coils 21b and 21b. Further, the bottom portion of the bobbin 21a on the valve body 30 side has a hakama portion 21K as an "annular wall portion" whose diameter is expanded from the opening 21H1 of the fitting hole 21H to the valve body 30 side. The hakama portion 21K is formed around the axis L of the opening of the fitting hole 21H, and the hakama portion 21K is formed so as to project below the casting resin portion 21D in the axis L direction. .. In fact, when casting the stator 21, in FIG. 2A, the casting resin is poured in an upside-down posture, filled with the amount of resin that does not overflow from the upper ends of the exterior cover 21C and the hakama portion 21K, and solidified. Therefore, it is configured like this. The bracket 1 is arranged so as to straddle a part of the hakama portion 21K (annular wall portion) from the casting resin portion 21D side to the fitting hole 21H. A joint iron (yoke) 21c having a magnetic pole tooth 21d is integrally assembled to the bobbin 21a by molding, and the magnetic pole tooth 21d of the joint iron 21c is arranged on a part of the inner peripheral surface of the fitting hole 21H. Has been done. The magnetic pole teeth 21d are arranged to face the outer peripheral surface of the can 40.

以上の構成により、ステッピングモータ２０では、コイル２１ｂへのパルス出力の印加によりコイル２１ｂが磁力線を発生する。これにより、磁極歯２１ｄに磁極（Ｎ、Ｓ極）が交互に変化し、マグネットロータ２２に対して磁気吸引力及び磁気反発力を発生し、マグネットロータ２２が回転する。これにより弁本体３０内部の弁部材が作動し弁口の開度が可変に制御されることで、前記のように第１継手管３１から第２継手管３２へ、あるいは第２継手管３２から第１継手管３１へ流れる冷媒の流量が制御される。 With the above configuration, in the stepping motor 20, the coil 21b generates a magnetic force line by applying the pulse output to the coil 21b. As a result, the magnetic poles (N, S poles) change alternately in the magnetic pole teeth 21d, a magnetic attraction force and a magnetic repulsion force are generated with respect to the magnet rotor 22, and the magnet rotor 22 rotates. As a result, the valve member inside the valve body 30 operates and the opening degree of the valve opening is variably controlled, so that the first joint pipe 31 to the second joint pipe 32 or from the second joint pipe 32 as described above. The flow rate of the refrigerant flowing to the first joint pipe 31 is controlled.

キャン４０は軸線Ｌを中心軸とし、マグネットロータ２２の外周に対向する小径部４０Ａと、小径部４０Ａから弁本体３０側に拡径された大径部４０Ｂとから構成されている。そして、ステータ２１の嵌挿孔２１Ｈ内にキャン４０の小径部４０Ａが嵌め込まれるとともに、キャン４０の大径部４０Ｂが、開口部２１Ｈ１の弁本体３０側に位置する状態で、ボビン２１ａの袴部２１Ｋ内にその一部が収容されている。これにより、ステータ２１が弁装置に装着されている。また、ステータ２１の底部には、「固定用金具」としてのブラケット１が取り付けられている。 The can 40 has an axis L as a central axis, and is composed of a small diameter portion 40A facing the outer periphery of the magnet rotor 22 and a large diameter portion 40B whose diameter is expanded from the small diameter portion 40A to the valve body 30 side. Then, the small diameter portion 40A of the can 40 is fitted into the fitting insertion hole 21H of the stator 21, and the large diameter portion 40B of the can 40 is located on the valve body 30 side of the opening 21H1. A part of it is housed in 21K. As a result, the stator 21 is attached to the valve device. Further, a bracket 1 as a "fixing metal fitting" is attached to the bottom of the stator 21.

ブラケット１は、金属板のプレス加工等により形成され、３つの板状部からなる溝構造の基部１１と、基部１１と一体に該基部１１の側部から延設された弾性片１２とを有している。基部１１は、外側板１１ａと対向して上記弾性片１２が延設された内側板１１ｂと、外側板１１ａと内側板１１ｂとを連結する連結板１１ｃとで構成されている。弾性片１２は、この弾性片１２と一体に形成された凸部１２ａと、弾性片１２の基部１１とは反対側の一部を折り曲げることで形成された押圧部１２ｂと支点部１２ｃとを有している。 The bracket 1 has a base portion 11 having a groove structure formed by pressing a metal plate or the like and having three plate-shaped portions, and an elastic piece 12 extending from the side portion of the base portion 11 integrally with the base portion 11. is doing. The base portion 11 is composed of an inner plate 11b in which the elastic piece 12 is extended so as to face the outer plate 11a, and a connecting plate 11c that connects the outer plate 11a and the inner plate 11b. The elastic piece 12 has a convex portion 12a integrally formed with the elastic piece 12, a pressing portion 12b and a fulcrum portion 12c formed by bending a part of the elastic piece 12 on the opposite side to the base portion 11. is doing.

ボビン２１ａの袴部２１Ｋの一部には略直方体状の固定ブロック２１Ｂが形成されている。すなわち、この固定ブロック２１Ｂは、嵌挿孔２１Ｈの軸線Ｌ回りの開口部２１Ｈ１の外周に形成されるとともに、ボビン２１ａにおいてコイル２１ｂの軸線Ｌ方向の下端部より下側に形成されている。また、固定ブロック２１Ｂの内側（軸線Ｌ側）にはスリット４１が形成され、固定ブロック２１Ｂの外側（軸線Ｌ側とは反対側）には嵌め込み溝４２が形成されている。そして、ブラケット１の内側板１１ｂが固定ブロック２１Ｂの内側のスリット４１に嵌め込まれるとともに、外側板１１ａが固定ブロック２１Ｂの外側の嵌め込み溝４２に嵌め込まれている。なお、外側板１１ａと内側板１１ｂには、嵌め込み溝４２とスリット４１からの抜け止め（不図示）が施されている。これにより、ブラケット１が固定ブロック２１Ｂに固定されている。また、ボビン２１ａ及びコイル２１ｂ，２１ｂと外装カバー２１Ｃとの間に充填された注型樹脂部２１Ｄが、固定ブロック２１Ｂの外側の嵌め込み溝４２内に侵入している。 A substantially rectangular parallelepiped fixed block 21B is formed in a part of the hakama portion 21K of the bobbin 21a. That is, the fixed block 21B is formed on the outer periphery of the opening 21H1 around the axis L of the fitting hole 21H, and is formed on the bobbin 21a below the lower end of the coil 21b in the axis L direction. Further, a slit 41 is formed inside the fixed block 21B (on the L side of the axis), and a fitting groove 42 is formed on the outside of the fixed block 21B (on the side opposite to the L side of the axis). Then, the inner plate 11b of the bracket 1 is fitted into the slit 41 inside the fixing block 21B, and the outer plate 11a is fitted into the fitting groove 42 outside the fixing block 21B. The outer plate 11a and the inner plate 11b are provided with a fitting groove 42 and a retaining hole (not shown) from the slit 41. As a result, the bracket 1 is fixed to the fixing block 21B. Further, the cast resin portion 21D filled between the bobbin 21a and the coils 21b and 21b and the exterior cover 21C has penetrated into the fitting groove 42 on the outside of the fixing block 21B.

図４に示すように、ブラケット１の凸部１２ａとキャン４０の凹部４０ａとは、ステータ２１が弁装置に組み付けた状態で係合する。これにより、キャン４０に対して、ステータ２１の軸線Ｌ回りの位置決めがなされるとともに、ステータ２１は軸線Ｌ方向の抜け防止をされた状態でキャン４０に取り付けられている。また、ブラケット１の弾性片１２は、押圧部１２ｂをキャン４０の外周に当接させた状態で、支点部１２ｃを袴部２１Ｋの内周に当接される。これにより、弾性片１２は、この弾性片１２の自己の弾性力により、支点部１２ｃを支点としてキャン４０を押圧している。これにより、弾性片１２と開口部２１Ｈ１の弾性片１２とは反対側の対向内壁とでキャン４０を挟み付けた状態となっている。 As shown in FIG. 4, the convex portion 12a of the bracket 1 and the concave portion 40a of the can 40 are engaged with each other in a state where the stator 21 is assembled to the valve device. As a result, the stator 21 is positioned around the axis L of the stator 21 with respect to the can 40, and the stator 21 is attached to the can 40 in a state where the stator 21 is prevented from coming off in the axis L direction. Further, the elastic piece 12 of the bracket 1 is brought into contact with the inner circumference of the hakama portion 21K with the fulcrum portion 12c in a state where the pressing portion 12b is in contact with the outer circumference of the can 40. As a result, the elastic piece 12 presses the can 40 with the fulcrum portion 12c as the fulcrum by the elastic force of the elastic piece 12. As a result, the can 40 is sandwiched between the elastic piece 12 and the facing inner wall on the opposite side of the elastic piece 12 of the opening 21H1.

以上のように、この実施形態では、固定用金具としてのブラケット１は、弁装置と係合する弾性片１２と、固定ブロック２１Ｂに固定される基部１１とを有し、基部１１は、固定ブロック２１Ｂを嵌合孔２１Ｈの径方向に挟みつける外側板１１ａと内側板１１ｂとを連結板１１ｃで一体にした構造である。 As described above, in this embodiment, the bracket 1 as a fixing bracket has an elastic piece 12 that engages with the valve device and a base 11 that is fixed to the fixing block 21B, and the base 11 is a fixing block. The structure is such that the outer plate 11a and the inner plate 11b that sandwich the 21B in the radial direction of the fitting hole 21H are integrated by the connecting plate 11c.

固定ブロック２１Ｂには「開放空間部」としての深溝５１が形成されている。この深溝５１は、固定ブロック２１Ｂの軸線Ｌ方向の下端面で、ブラケット１の基部１１の連結板１１ｃに対向するとともに、軸線Ｌ回りの略周方向に沿った溝となっている。また、図２（Ｂ）に示すように、ブラケット１の基部１１（連結板１１ｃ）の軸線Ｌ回りの略周方向の幅（Ｂ）は、深溝５１の軸線Ｌ回りの略周方向の幅（Ａ）内に内包されるよう構成されている。これにより、基部１１の前記幅（Ｂ）の両側に深溝５１の開放部が形成されるので、基部１１の連結板１１ｃと固定ブロック２１Ｂの間で毛細管現象が生じるような隙間が途絶える部分ができる 。 A deep groove 51 as an "open space portion" is formed in the fixed block 21B. The deep groove 51 is a lower end surface of the fixed block 21B in the axis L direction, faces the connecting plate 11c of the base 11 of the bracket 1, and is a groove along the substantially circumferential direction around the axis L. Further, as shown in FIG. 2B, the width (B) in the substantially circumferential direction around the axis L of the base portion 11 (connecting plate 11c) of the bracket 1 is the width (B) in the substantially circumferential direction around the axis L of the deep groove 51. A) It is configured to be included in. As a result, open portions of the deep groove 51 are formed on both sides of the width (B) of the base portion 11, so that there is a portion where a gap such as a capillary phenomenon occurs between the connecting plate 11c of the base portion 11 and the fixing block 21B. ..

以上のように、固定ブロック２１Ｂに深溝５１が形成されているので、注型樹脂部２１Ｄの注型時（図２（Ａ）において、上下逆さの姿勢にて）に、溶融した樹脂が固定ブロック２１Ｂ（あるいは袴部２１Ｋ）とブラケット１との隙間において毛細管現象により流動しても、深溝５１に樹脂の一部が溜まり、その樹脂の流れは深溝５１を超えることがなく、注型樹脂部２１Ｄの一部がブラケット１の弾性片１２側に形成されることがない。また、そのような注型樹脂部２１Ｄの一部が嵌挿孔２１Ｈ側にも形成されることがない。したがって、この嵌挿孔２１Ｈ内にキャン４０（弁装置）を容易に嵌め込むことができる。また、注型樹脂部２１Ｄの一部が弾性片１２側に形成されることがないため、弾性片１２とボビン部が固着して、弾性片として機能しなくなることも無く、ブラケット１の弾性片１２も確実に作用する。 As described above, since the deep groove 51 is formed in the fixed block 21B, the molten resin is the fixed block when the casting resin portion 21D is cast (in the upside down posture in FIG. 2A). Even if the resin flows in the gap between the 21B (or the hakama portion 21K) and the bracket 1 due to the capillary phenomenon, a part of the resin is accumulated in the deep groove 51, and the flow of the resin does not exceed the deep groove 51, and the casting resin portion 21D A part of the bracket 1 is not formed on the elastic piece 12 side of the bracket 1. Further, a part of such a casting resin portion 21D is not formed on the fitting hole 21H side as well. Therefore, the can 40 (valve gear) can be easily fitted into the fitting / insertion hole 21H. Further, since a part of the casting resin portion 21D is not formed on the elastic piece 12 side, the elastic piece 12 and the bobbin portion do not stick to each other and do not function as an elastic piece, and the elastic piece of the bracket 1 does not function. 12 also works reliably.

図５乃至図７は「開放空間部」の変形例１乃至３を示す図である。図５の変形例１は、固定ブロック２１Ｂにおいて、ブラケット１の基部１１の外側板１１ａ側の角に「開放空間部」としての入隅部５２を形成したものである。図６の変形例２は、ブラケット１の基部１１の連結板１１ｃを変形し、固定ブロック２１Ｂの軸線Ｌ方向の端面に対向するように「開放空間部」としての凹部５３を形成したものである。図７の変形例３は、ブラケット１の基部１１の連結板１１ｃを変形し、基部１１の外側板１１ａ側に「開放空間部」としての凹部５４を形成したものである。 5 to 7 are views showing modification 1 to 3 of the “open space portion”. In the modified example 1 of FIG. 5, in the fixed block 21B, an inside corner portion 52 as an “open space portion” is formed at a corner of the base portion 11 of the bracket 1 on the outer side plate 11a side. In the second modification of FIG. 6, the connecting plate 11c of the base portion 11 of the bracket 1 is deformed to form a recess 53 as an “open space portion” so as to face the end face of the fixed block 21B in the axis L direction. .. In the modified example 3 of FIG. 7, the connecting plate 11c of the base portion 11 of the bracket 1 is deformed to form a recess 54 as an “open space portion” on the outer plate 11a side of the base portion 11.

以上のいずれの変形例においても、注型樹脂部２１Ｄの注型時（図５乃至図７において、上下逆さの姿勢にて）に、溶融した樹脂が固定ブロック２１とブラケット１との隙間において毛細管現象により流動しても、「開放空間部」に樹脂の一部が溜まり、その樹脂の流れは「開放空間部」を超えることがなく、注型樹脂部２１Ｄの一部がブラケット１の弾性片１２側や嵌挿孔２１Ｈ側に形成されることがない。したがって、この嵌挿孔２１Ｈ内にキャン４０（弁装置）を容易に嵌め込むことができる。また、前記実施形態と同様にブラケット１の弾性片１２も確実に作用する。 In any of the above modifications, when the casting resin portion 21D is cast (in the upside down posture in FIGS. 5 to 7), the molten resin is formed into a capillary tube in the gap between the fixing block 21 and the bracket 1. Even if it flows due to the phenomenon, a part of the resin accumulates in the "open space part", the flow of the resin does not exceed the "open space part", and a part of the casting resin part 21D is an elastic piece of the bracket 1. It is not formed on the 12 side or the fitting hole 21H side. Therefore, the can 40 (valve gear) can be easily fitted into the fitting / insertion hole 21H. Further, the elastic piece 12 of the bracket 1 also works reliably as in the above embodiment.

以上のように、「開放空間部」は注型樹脂部２１Ｄの注型時に、溶融した樹脂が毛細管現象により流動しても、その樹脂の流れが嵌挿孔２１Ｈ側に流出するのを防止するものである。このためには、実施形態や変形例の構造に限定されることがなく、毛細管現象が生じないような隙間を設ける、あるいはギャップを設けるものであればよい。例えば、毛細管現象を生じない隙間としては、１ｍｍ以上であることが、好ましい。また、隙間は０．５ｍｍ以上であっても良いし、３ｍｍ以上であってもよい。なお、開放空間部としての溝の形状としては、図２（Ｂ）の長方形型の溝に限られず、正方形型溝、湾曲溝、丸形溝、楕円形溝、弓形溝、三日月形溝などでも良い。また、開放空間部の容積も、各図に限定されるものではなく、図の溝のサイズより大でも良いし、発明の要旨を逸脱しない程度に小さくても良い。 As described above, the "open space portion" prevents the flow of the resin from flowing out to the fitting hole 21H side even if the molten resin flows due to the capillary phenomenon at the time of casting the casting resin portion 21D. It is a thing. For this purpose, the structure is not limited to the embodiment or the modified example, and a gap may be provided so as not to cause a capillary phenomenon, or a gap may be provided. For example, the gap that does not cause the capillary phenomenon is preferably 1 mm or more. Further, the gap may be 0.5 mm or more, or may be 3 mm or more. The shape of the groove as the open space is not limited to the rectangular groove shown in FIG. 2B, but may be a square groove, a curved groove, a round groove, an elliptical groove, a bow-shaped groove, a crescent-shaped groove, or the like. good. Further, the volume of the open space portion is not limited to each figure, and may be larger than the size of the groove in the figure or may be small enough not to deviate from the gist of the invention.

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。 Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the design changes, etc. within the range not deviating from the gist of the present invention, etc. Even if there is, it is included in the present invention.

１ ブラケット（固定用金具）
１１ 基部
１１ａ 外側板
１１ｂ 内側板
１１ｃ 連結板
１２ 弾性片
１２ａ 凸部
４１ スリット
４２ 嵌め込み溝
５１ 深溝（開放空間部）
５２ 入隅部（開放空間部）
５３ 凹部（開放空間部）
５４ 凹部（開放空間部）
２０ ステッピングモータ（モータ部）
２１ ステータ（電動弁用ステータ）
２１ａ ボビン
２１ｂ コイル
２１Ｈ 嵌挿孔
２１Ｋ 袴部（環状壁部）
２１Ｂ 固定ブロック
２２ マグネットロータ
３０ 弁本体（弁装置）
４０ キャン（弁装置、円筒部）
４０Ａ 小径部
４０Ｂ 大径部
Ｌ 軸線 1 Bracket (fixing bracket)
11 Base 11a Outer plate 11b Inner plate 11c Connecting plate 12 Elastic piece 12a Convex 41 Slit 42 Fitting groove 51 Deep groove (open space)
52 Inside corner (open space)
53 Recess (open space)
54 Recess (open space)
20 Stepping motor (motor section)
21 Stator (solenoid valve stator)
21a Bobbin 21b Coil 21H Fitting hole 21K Hakama part (annular wall part)
21B Fixed block 22 Magnet rotor 30 Valve body (valve gear)
40 cans (valve gear, cylindrical part)
40A Small diameter part 40B Large diameter part L axis

Claims (7)

モータ部の駆動により作動する弁装置に対して装着され、コイルを内装し、前記弁装置側のマグネットロータと共に前記モータ部を構成する電動弁用ステータであって、
前記コイルが巻装されるとともに該コイルの軸線方向に前記弁装置を嵌め込む嵌挿孔を有するボビンと、
前記ボビン及び前記コイルを覆う外装カバーと、
前記ボビン及び前記コイルと前記外装カバーとの間に充填された注型樹脂部と、
前記ボビンの前記嵌挿孔の開口部の前記軸線回りの周囲に形成された環状壁部と、
前記注型樹脂部側から前記嵌挿孔まで少なくとも一部が前記環状壁部を跨いで配置されて当該電動弁用ステータと前記弁装置との固定に寄与する固定用金具とを備え、
前記外装カバーの開口端の全周及び前記環状壁部の全周は、前記注型樹脂部よりも前記軸線方向の前記固定用金具側に突出して形成されており、
前記固定用金具は、前記環状壁部の内側に配置される内側板と、前記環状壁部の外側に配置される外側板と、を含み、
前記外側板の端部は、前記注型樹脂部に接触した状態で配置され、
前記環状壁部の前記固定用金具が跨ぐ部分には開放空間部が形成されており、
前記開放空間部の周方向の幅は、前記固定用金具の前記軸線回りの略周方向の幅と同等以上の幅に形成されていることを特徴とする電動弁用ステータ。 A stator for an electric valve that is attached to a valve device that is operated by driving a motor unit, has a coil inside, and constitutes the motor unit together with a magnet rotor on the valve device side.
A bobbin having a fitting hole for fitting the valve device in the axial direction of the coil while the coil is wound.
An exterior cover that covers the bobbin and the coil,
A casting resin portion filled between the bobbin and the coil and the exterior cover, and
An annular wall formed around the axis of the opening of the fitting hole of the bobbin, and
At least a part from the casting resin portion side to the fitting hole is arranged so as to straddle the annular wall portion, and is provided with a fixing metal fitting that contributes to fixing the motorized valve stator and the valve device.
The entire circumference of the opening end of the exterior cover and the entire circumference of the annular wall portion are formed so as to project from the casting resin portion toward the fixing metal fitting side in the axial direction.
The fixing metal fitting includes an inner plate arranged inside the annular wall portion and an outer plate arranged outside the annular wall portion.
The end portion of the outer plate is arranged in contact with the casting resin portion.
An open space portion is formed in the portion of the annular wall portion where the fixing metal fitting straddles.
A stator for an electric valve, characterized in that the width in the circumferential direction of the open space portion is formed to be equal to or larger than the width in the circumferential direction around the axis of the fixing metal fitting. 前記固定用金具は、前記弁装置と係合する弾性片と、前記環状壁部の一部に形成された固定ブロックに固定される基部とを有し、
前記開放空間部が前記固定ブロックと前記基部との何れか一方または両方に設けられていることを特徴とする請求項１に記載の電動弁用ステータ。 The fixing bracket has an elastic piece that engages with the valve device and a base that is fixed to a fixing block formed in a part of the annular wall portion.
The stator for an electric valve according to claim 1, wherein the open space portion is provided in either one or both of the fixed block and the base portion. 前記開放空間部が前記固定ブロックに形成された請求項２に記載の電動弁用ステータであって、前記固定ブロックの前記軸線方向の端面で前記基部に対向する一部に前記軸線回りの略周方向に溝が形成され、前記溝が前記開放空間部を構成していることを特徴とする電動弁用ステータ。 The motor valve stator according to claim 2, wherein the open space portion is formed in the fixed block, and a portion of the fixed block facing the base portion at the end face in the axial direction has a substantially circumferential circumference around the axis. A stator for an electric valve, characterized in that a groove is formed in a direction and the groove constitutes the open space portion. 前記開放空間部が前記基部に形成された請求項２に記載の電動弁用ステータであって、前記基部の前記固定ブロックの前記軸線方向の端面に対向する部位に、前記軸線回りの略周方向に凹部が形成され、前記凹部が前記開放空間部を構成していることを特徴とする電動弁用ステータ。 The motor valve stator according to claim 2, wherein the open space portion is formed in the base portion, and the portion of the base portion facing the end surface of the fixed block in the axial direction is located in a substantially circumferential direction around the axial line. A stator for an electric valve, characterized in that a recess is formed in the recess, and the recess constitutes the open space portion. 前記固定ブロックの前記基部に対向する一部に形成された溝が前記開放空間部を構成していることを特徴とする請求項２に記載の電動弁用ステータ。 The stator for an electric valve according to claim 2, wherein a groove formed in a part of the fixed block facing the base portion constitutes the open space portion . 前記基部の前記軸線回りの略周方向の幅が前記溝の前記軸線回りの略周方向の幅内に内包されることを特徴とする請求項３に記載の電動弁用ステータ。 The stator for an electric valve according to claim 3, wherein the width of the base portion in the substantially circumferential direction around the axis is included in the width of the groove in the substantially circumferential direction around the axis. 請求項１乃至６のいずれか一項に記載の電動弁用ステータを前記弁装置に備えてなることを特徴とする電動弁。 A motorized valve comprising the stator for a motorized valve according to any one of claims 1 to 6 provided in the valve device.
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CN202010036844.7A CN111509872B (en) 2019-01-31 2020-01-14 Stator for electric valve and electric valve
CN202210774980.5A CN114977550A (en) 2019-01-31 2020-01-14 Stator for electric valve and electric valve
JP2022043339A JP7288531B2 (en) 2019-01-31 2022-03-18 Motor-operated valve stator and motor-operated valve

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