JP2008190603A - Solenoid valve - Google Patents

Solenoid valve Download PDF

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JP2008190603A
JP2008190603A JP2007024855A JP2007024855A JP2008190603A JP 2008190603 A JP2008190603 A JP 2008190603A JP 2007024855 A JP2007024855 A JP 2007024855A JP 2007024855 A JP2007024855 A JP 2007024855A JP 2008190603 A JP2008190603 A JP 2008190603A
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valve seat
valve
seat member
flow passage
seat surface
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JP4773380B2 (en
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Keiichi Tatsuno
敬一 龍野
Keita Murai
桂太 村井
Takaomi Shirase
隆臣 白勢
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Nissin Kogyo Co Ltd
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Nissin Kogyo Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a solenoid valve which materializes excellent surface precision of a valve seat surface, high abrasion resistance and low manufacturing cost. <P>SOLUTION: A normally open solenoid valve 1 consists of a fixed core 3, a movable core 7, a coil 42, a valve element 5 moving integrally with the movable core 7 and a valve seat member 6 having a funnel-shaped valve seat surface 61. The valve seat member 6 has a substantially cylindrical outside shape, includes a valve seat surface 61 on the top surface, a flow passage 62 in a valve seat member forming a part of a flow passage R extending upward from the center of the undersurface 65 and a valve hole 66 for communicating between the bottom of the valve seat surface 61 and flow passage 62 in a valve seat member, and is molded by forging including the valve seat surface 61, flow passage 62 in a valve seat member and valve hole 66. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、電磁弁に関し、特に弁座部材を改良した電磁弁に関する。   The present invention relates to a solenoid valve, and more particularly to a solenoid valve having an improved valve seat member.

一般に、電磁弁（ソレノイドバルブ）は、コイル、固定コアおよび可動コアを有し、コイルに流す電流により磁界を発生させて可動コアと固定コアを互いに引き付け、この引き付け力により、弁体を弁座部材の弁座面に当接・離間させて流路の開閉を行うように構成されている。   In general, an electromagnetic valve (solenoid valve) has a coil, a fixed core, and a movable core, generates a magnetic field by a current flowing through the coil, and attracts the movable core and the fixed core to each other. The flow path is opened and closed by contacting and separating from the valve seat surface of the member.

弁座部材（弁座体）は、漏斗形状の弁座面と、この弁座面の底部に弁孔（流路）を有しており、この弁座面と弁孔は、切削加工により成形されるのが一般的である。例えば、特許文献１に記載されたような電磁弁の弁座体では、詳細の記述はないが、切削加工により弁座面（同文献内の弁座４２）と弁孔（同文献内の第１弁座体開口部４４）が成形される。   The valve seat member (valve seat body) has a funnel-shaped valve seat surface and a valve hole (flow path) at the bottom of the valve seat surface. The valve seat surface and the valve hole are formed by cutting. It is common to be done. For example, in the valve seat body of an electromagnetic valve as described in Patent Document 1, although there is no detailed description, the valve seat surface (the valve seat 42 in the same document) and the valve hole (the first in the same document) are cut by machining. One valve seat opening 44) is formed.

特開２００４−３６０７５０号公報JP 2004-360750 A

しかしながら、電磁弁は、弁体が弁座面に繰り返し当接するため、弁座面に耐摩耗性が求められる。また、弁座面を切削加工により成形すると、切削痕ができるため、弁座面の弁体と当接する部分の面粗度が粗くなり、弁体が弁座面に引っ掛かりをおこし、流体の流れによって弁体が振動し、これが流体の脈動となって発生するという問題がある。
また、切削加工によると、製造コストが嵩むという問題がある。特に、小型部品は、チャックなどの取り扱いに困難が伴うため、基本機能をなす主要部分については、切削以外の一種の工程で製造できるのが望ましい。
そこで、本発明では、弁座面の表面精度が良好で耐摩耗性も高く、かつ低コストで製造できる電磁弁を提供することを課題とする。 However, since the valve body repeatedly contacts the valve seat surface, the solenoid valve is required to have wear resistance on the valve seat surface. In addition, when the valve seat surface is molded by cutting, cutting marks are formed, and the surface roughness of the portion of the valve seat surface that comes into contact with the valve body becomes rough, causing the valve body to catch on the valve seat surface and causing fluid flow. This causes a problem that the valve body vibrates and this is generated as fluid pulsation.
Moreover, according to cutting, there exists a problem that manufacturing cost increases. In particular, since small parts are difficult to handle such as a chuck, it is desirable that the main part having the basic function can be manufactured by a kind of process other than cutting.
Therefore, an object of the present invention is to provide an electromagnetic valve that has good surface accuracy of the valve seat surface, high wear resistance, and can be manufactured at low cost.

前記した課題を解決するための本発明は、固定コアと、当該固定コアに対して進退可能に配置された可動コアと、電流が流れることで前記固定コアおよび前記可動コアを互いに引き付けるための磁界を発生するコイルと、前記可動コアと一体に移動するよう配置された弁体と、前記弁体と当接して流路を閉塞可能な弁座面を有する弁座部材とを備え、前記弁体の前記弁座面への進退移動により、前記流路を開閉する電磁弁であって、前記弁座部材は、略円柱状の外形を有して、上面に前記弁座面が形成され、下面中央から上方へ延びる前記流路の一部を形成する弁座部材内流路と、前記弁座面の底部と前記弁座部材内流路とを連通する前記弁座部材内流路より小径な弁孔とを備え、前記弁座面、前記弁座部材内流路および前記弁孔を含めて鍛造により成形されたことを特徴とする。   The present invention for solving the above-described problems includes a fixed core, a movable core disposed so as to be movable back and forth with respect to the fixed core, and a magnetic field for attracting the fixed core and the movable core to each other when a current flows. A valve body arranged to move integrally with the movable core, and a valve seat member having a valve seat surface that contacts the valve body and can close the flow path, An electromagnetic valve that opens and closes the flow path by moving forward and backward to the valve seat surface, wherein the valve seat member has a substantially cylindrical outer shape, the valve seat surface is formed on an upper surface, and a lower surface The valve seat member internal flow path that forms a part of the flow path extending upward from the center, and the valve seat member internal flow path that communicates the bottom of the valve seat surface and the valve seat member internal flow path. A valve hole, forged including the valve seat surface, the flow passage in the valve seat member and the valve hole. Characterized in that it is formed by.

このような電磁弁によれば、微小な部品である弁座部材において、基本機能をなす弁座面、弁座部材内流路および弁孔のすべてが鍛造で成形されるため、この部位の成形のために別の製造設備に移動する必要が無い。特に、これらの部分の成形において、切削を利用せず、鍛造を利用すれば、切削による加工時間を省略し、全体としての加工時間も極めて短くなるので、低コスト化を図ることができる。
また、弁座面を鍛造で成形することにより、平滑な面が得られ、弁体とのシール性を向上できるとともに、材料の加工硬化により、耐久性も向上させることができる。 According to such a solenoid valve, in the valve seat member which is a minute part, all of the valve seat surface, the valve seat member internal passage and the valve hole which form the basic function are formed by forging. Therefore, it is not necessary to move to another manufacturing facility. In particular, in the formation of these portions, if cutting is not used but forging is used, the processing time by cutting is omitted, and the processing time as a whole becomes extremely short, so that the cost can be reduced.
Further, by forming the valve seat surface by forging, a smooth surface can be obtained, the sealing performance with the valve body can be improved, and the durability can also be improved by work hardening of the material.

前記した電磁弁においては、前記弁座部材は、外周部分において他の部品に圧入される場合には、当該外周部分も鍛造により成形されるのが望ましい。   In the electromagnetic valve described above, when the valve seat member is press-fitted into another part at the outer peripheral portion, it is desirable that the outer peripheral portion is also formed by forging.

このように、圧入される外周部分も鍛造により成形することにより、低コストで製造することができる。   Thus, the outer peripheral portion to be press-fitted can be manufactured at low cost by forming by forging.

本発明の電磁弁によれば、弁座面の表面精度が良好で、耐摩耗性が高く、かつ低コストで製造できる。   According to the solenoid valve of the present invention, the surface accuracy of the valve seat surface is good, the wear resistance is high, and it can be manufactured at low cost.

次に、本発明の実施形態について、適宜図面を参照しながら詳細に説明する。参照する図面において、図１は、実施形態に係る常開型電磁弁を示す縦断面図である。図２は、弁座部材の製造工程を説明する図であり、（ａ）は素材形状、（ｂ）は主成形加工工程、（ｃ）は主成形加工後、（ｄ）は打ち抜き加工を示す。   Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In the drawings to be referred to, FIG. 1 is a longitudinal sectional view showing a normally open solenoid valve according to an embodiment. FIGS. 2A and 2B are diagrams for explaining the manufacturing process of the valve seat member, where FIG. 2A shows the material shape, FIG. 2B shows the main forming process, FIG. 2C shows the main forming process, and FIG. 2D shows the punching process. .

図１に示すように、常開型電磁弁１は、アンチロックブレーキ装置などの基体Ｂに形成された流路Ｒの閉塞・開放を切り替えるための弁であり、主に、固定コア３、コイルユニット４、弁体５、弁座部材６、および可動コア７を備えて構成されている。
この常開型電磁弁１は、通常時は、弁体５が弁座部材６から離れており、下方（便宜上、上下は図１を基準とする）につながった流路Ｒ１から側部でつながった流路Ｒ２への作動液の流れを許容している。そして、コイルユニット４への通電により弁体５が弁座部材６に当接すると、流路Ｒが閉塞されて作動液の流れが遮断される。また、本実施形態の常開型電磁弁１では、流路Ｒ１の作動液の圧力と、流路Ｒ２の作動液の圧力との差が所定値以上の場合には、その圧力差による作動液の流れが、弁体５に働く閉弁力に打ち勝って流路Ｒが開くようになっている。すなわち、常開型電磁弁１は、コイルユニット４への通電電流値に応じて、弁体５の閉塞力を制御可能なリニアソレノイドバルブ（差圧制御弁）である。 As shown in FIG. 1, the normally open electromagnetic valve 1 is a valve for switching between closing and opening of a flow path R formed in a base B such as an antilock brake device, and mainly includes a fixed core 3, a coil The unit 4 includes a valve body 5, a valve seat member 6, and a movable core 7.
In the normally open electromagnetic valve 1, the valve body 5 is normally separated from the valve seat member 6 and is connected at the side from the flow path R1 connected downward (for convenience, the upper and lower sides are based on FIG. 1). The flow of the hydraulic fluid to the flow path R2 is allowed. When the valve element 5 comes into contact with the valve seat member 6 by energization of the coil unit 4, the flow path R is closed and the flow of hydraulic fluid is blocked. Further, in the normally open solenoid valve 1 of the present embodiment, when the difference between the pressure of the hydraulic fluid in the flow path R1 and the pressure of the hydraulic fluid in the flow path R2 is a predetermined value or more, the hydraulic fluid due to the pressure difference This overcomes the valve closing force acting on the valve body 5 so that the flow path R is opened. That is, the normally open solenoid valve 1 is a linear solenoid valve (differential pressure control valve) that can control the closing force of the valve body 5 in accordance with the value of the current supplied to the coil unit 4.

固定コア３は、各部品を収容するハウジングを兼ねており、上下に貫通した孔を有する円筒状の部材である。固定コア３は、基体Ｂに装着されるボディ部３１と、ボディ部３１より細い外径で形成されて上方に延びたコア部３２とから構成されている。ボディ部３１の内部には、弁体５および弁座部材６が収容されている。   The fixed core 3 also serves as a housing that accommodates each component, and is a cylindrical member having a hole penetrating vertically. The fixed core 3 includes a body part 31 attached to the base B and a core part 32 that is formed with an outer diameter narrower than the body part 31 and extends upward. Inside the body part 31, the valve body 5 and the valve seat member 6 are accommodated.

弁体５は、先端に半球状に形成されたシール部５１が形成され、このシール部５１に円柱状の軸部５２がつながっている。軸部５２の上には、軸部５２より大きな直径で大径部５３が形成され、軸部５２と大径部５３とは、テーパ形状の拡径部５２ａによりつながった形となっている。すなわち、軸部５２から大径部５３に向けて徐々に拡径している。大径部５３の上には、さらに大きな径で鍔部５４が設けられている。鍔部５４の上には、接続ピン５５が上方に延びて形成されている。   The valve body 5 is formed with a hemispherical seal portion 51 at the tip, and a cylindrical shaft portion 52 is connected to the seal portion 51. A large-diameter portion 53 having a larger diameter than the shaft portion 52 is formed on the shaft portion 52, and the shaft portion 52 and the large-diameter portion 53 are connected by a tapered diameter-enlarged portion 52a. That is, the diameter gradually increases from the shaft portion 52 toward the large diameter portion 53. On the large-diameter portion 53, a flange portion 54 having a larger diameter is provided. On the flange portion 54, a connection pin 55 is formed extending upward.

弁座部材６は、外形が円柱形状の部材であり、上面６９の中央に、後述するリターンスプリング８１を位置決めするバネ支持部６９ａが上方に突出して形成され、このバネ支持部６９ａの中央に漏斗状の弁座面６１が形成されている。一方、弁座部材６の下面６５の中央から上方へ向かって弁座部材内流路６２が形成されている。弁座面６１の漏斗形状の底部からは弁座部材内流路６２より小径の弁孔６６が弁座部材内流路６２に通じている。この弁座部材内流路６２は、常開型電磁弁１の下方から弁座部材６の上部の弁室８４に作動液が流入するための通路であり、流路Ｒの一部を構成する。また、弁座部材６には、この弁座部材内流路６２から径方向外側にずれた位置に上下に貫通する戻り流路６３が形成されている。戻り流路６３の下部には、ボール弁６４が配置されて、戻り流路６３とともにチェック弁を構成している。ボール弁６４は、ボディ部３１の下端の内径に圧入されたフィルタ８３により脱落が防止されている。
このような弁座部材６は、弁座部材６の外周６７がボディ部３１の内周３１ａに圧入されて固定されている。 The valve seat member 6 is a member having a cylindrical shape, and a spring support portion 69a for positioning a return spring 81, which will be described later, protrudes upward at the center of the upper surface 69. A funnel is formed at the center of the spring support portion 69a. A valve seat surface 61 is formed. On the other hand, a flow passage 62 in the valve seat member is formed upward from the center of the lower surface 65 of the valve seat member 6. A valve hole 66 having a smaller diameter than the flow passage 62 in the valve seat member communicates with the flow passage 62 in the valve seat member from the funnel-shaped bottom portion of the valve seat surface 61. The flow passage 62 in the valve seat member is a passage through which hydraulic fluid flows from the lower side of the normally open electromagnetic valve 1 into the valve chamber 84 above the valve seat member 6 and constitutes a part of the flow passage R. . In addition, the valve seat member 6 is formed with a return flow path 63 penetrating vertically at a position shifted radially outward from the flow path 62 in the valve seat member. A ball valve 64 is disposed below the return flow path 63 and constitutes a check valve together with the return flow path 63. The ball valve 64 is prevented from falling off by a filter 83 that is press-fitted into the inner diameter of the lower end of the body portion 31.
In such a valve seat member 6, the outer periphery 67 of the valve seat member 6 is fixed by being press-fitted into the inner periphery 31 a of the body portion 31.

弁座部材６の上面６９と弁体５の鍔部５４との間には、弁体５を弁座部材６から離間させる付勢力を発生させるリターンスプリング８１が配置されている。   Between the upper surface 69 of the valve seat member 6 and the flange portion 54 of the valve body 5, a return spring 81 that generates a biasing force that separates the valve body 5 from the valve seat member 6 is disposed.

ボディ部３１の側壁には、複数の貫通穴３３が形成され、ボディ部３１の内外を連通している。この貫通穴３３が配置されている部分の外側には、筒状のフィルタ８５が嵌合しており、貫通穴３３を通る作動液中の異物を除去している。
ボディ部３１は、基体Ｂの装着穴Ｂ１に挿入され、装着穴Ｂ１の周囲をかしめることで固定されている。 A plurality of through holes 33 are formed in the side wall of the body portion 31 to communicate the inside and outside of the body portion 31. A cylindrical filter 85 is fitted to the outside of the portion where the through hole 33 is disposed, and foreign matters in the working fluid passing through the through hole 33 are removed.
The body portion 31 is inserted into the mounting hole B1 of the base B and fixed by caulking around the mounting hole B1.

コア部３２の内部は、弁室８４より一回り小さい直径の円筒面３４が形成され、円筒面３４内には、可動コア７と弁体５とを一体に動作させるための棒状のリテーナ５６が配置されている。リテーナ５６は、下端面に接続孔５７が形成され、この接続孔５７と弁体５の接続ピン５５とが嵌合して弁体５と一体に動くようになっている。リテーナ５６は、リターンスプリング８１により弁体５とともに上方に付勢されているため、リテーナ５６の上面５８は、可動コア７の下端面７１と当接している。
リテーナ５６の側面には、複数（１つのみ図示）の溝５９が全長にわたって形成されている。この溝５９は、リテーナ５６が上下動したときに、リテーナ５６の上下にある作動液を移動可能とすることでリテーナ５６の動きをスムーズにしている。 A cylindrical surface 34 having a diameter slightly smaller than that of the valve chamber 84 is formed inside the core portion 32, and a rod-shaped retainer 56 for operating the movable core 7 and the valve body 5 integrally in the cylindrical surface 34. Has been placed. The retainer 56 is formed with a connection hole 57 in the lower end surface, and the connection hole 57 and the connection pin 55 of the valve body 5 are fitted to move together with the valve body 5. Since the retainer 56 is biased upward together with the valve body 5 by the return spring 81, the upper surface 58 of the retainer 56 is in contact with the lower end surface 71 of the movable core 7.
A plurality of (only one shown) grooves 59 are formed on the side surface of the retainer 56 over the entire length. The groove 59 makes the movement of the retainer 56 smooth by allowing the hydraulic fluid above and below the retainer 56 to move when the retainer 56 moves up and down.

コア部３２の上端部３５は、円筒面３４より内径が若干大きく形成されている。この内径は後述する可動コア７の凸部７２が入ることができる大きさとなっている。すなわち、コア部３２の上面には、凸部７２の先端を収容可能な凹部３６が形成されている。固定コア３は、磁性体からなり、コイルユニット４により励磁されると、可動コア７を引き付けて弁を閉じる機能を果たす。   The upper end portion 35 of the core portion 32 has an inner diameter slightly larger than the cylindrical surface 34. The inner diameter is large enough to allow the convex portion 72 of the movable core 7 to be described later. That is, a concave portion 36 that can accommodate the tip of the convex portion 72 is formed on the upper surface of the core portion 32. The fixed core 3 is made of a magnetic material, and when excited by the coil unit 4, it functions to attract the movable core 7 and close the valve.

可動コア７は、リテーナ５６の上部に配置された磁性体からなる円柱状の部材である。可動コア７の側面には、全長にわたって形成された複数の溝７３（１つのみ図示）が形成されており、可動コア７が上下動したときに、可動コア７の上下にある作動液を移動可能とすることで、可動コア７の動きをスムーズにしている。
可動コア７の下端面７１は、中央が円形の輪郭で突出して凸部７２を形成している。この凸部７２は、上述したように固定コア３の上面の凹部３６に対向し、凹部３６に入る大きさとなっている。
コア部３２には、有底円筒状のガイド筒８６が外側から嵌合され、溶接により固定されている。可動コア７は、このガイド筒８６内に収容され、上下の進退動作がガイドされている。 The movable core 7 is a columnar member made of a magnetic material disposed on the retainer 56. A plurality of grooves 73 (only one is shown) formed over the entire length are formed on the side surface of the movable core 7, and when the movable core 7 moves up and down, the hydraulic fluid above and below the movable core 7 moves. By making it possible, the movement of the movable core 7 is made smooth.
The lower end surface 71 of the movable core 7 protrudes with a circular outline at the center to form a convex portion 72. As described above, the convex portion 72 faces the concave portion 36 on the upper surface of the fixed core 3 and is sized to enter the concave portion 36.
A bottomed cylindrical guide tube 86 is fitted to the core portion 32 from the outside, and is fixed by welding. The movable core 7 is accommodated in the guide cylinder 86, and the vertical movement is guided.

コイルユニット４は、樹脂製のボビン４１にコイル４２が巻かれて構成され、ボビン４１の外側には、磁路を形成するヨーク４３が配置されている。   The coil unit 4 is configured by winding a coil 42 around a resin bobbin 41, and a yoke 43 that forms a magnetic path is disposed outside the bobbin 41.

以上のような常開型電磁弁１において、弁座部材６は、主として鍛造により製造される。
この製造工程の一例について説明すると、まず、図２（ａ）に示すように、完成品である弁座部材６とほぼ同等の質量の素材Ｗ１を丸棒から円柱状に切断して得る。そして、図２（ｂ）に示すように、この素材Ｗ１を、弁座面６１およびバネ支持部６９ａの反転形状（符号１０３参照）を有する下型１０１にセットし、弁座部材内流路６２を反転させた先端形状を有するパンチ１０２を上から押し込んで後方押出加工する。
これにより得られたワークＷ２が図２（ｃ）である。 In the normally open solenoid valve 1 as described above, the valve seat member 6 is mainly manufactured by forging.
An example of this manufacturing process will be described. First, as shown in FIG. 2A, a material W1 having a mass substantially equal to that of the valve seat member 6 as a finished product is cut from a round bar into a cylindrical shape. Then, as shown in FIG. 2 (b), this material W1 is set in the lower mold 101 having the inverted shape of the valve seat surface 61 and the spring support portion 69a (see reference numeral 103), and the flow passage 62 in the valve seat member. A punch 102 having a tip shape that is inverted is pushed from above and backward extruded.
The workpiece W2 obtained as a result is shown in FIG.

そして、図２（ｄ）に示すように、別の下型１０４にワークＷ２をセットする。下型１０４には、弁座部材内流路６２に入って弁座面６１の下方を支持する入れ子１０８が入ってワークＷ２をほぼ密閉する。そして、円柱状のパンチ１０６を上（弁座面６１側）から押し込んで、弁孔６６を打ち抜く。なお、符号１０７は、弁孔６６を打ち抜いて脱落した破片を示す。
さらに、図示しないが戻り流路６３をドリル加工により形成する。 Then, as shown in FIG. 2D, the workpiece W2 is set on another lower mold 104. The lower mold 104 includes a nest 108 that enters the valve seat member internal flow path 62 and supports the lower portion of the valve seat surface 61, thereby substantially sealing the workpiece W2. Then, the cylindrical punch 106 is pushed in from above (the valve seat surface 61 side), and the valve hole 66 is punched out. Reference numeral 107 denotes a broken piece that has been punched out of the valve hole 66.
Further, although not shown, the return channel 63 is formed by drilling.

このように、本実施形態の常開型電磁弁１における弁座部材６は、主要部分である弁座面６１、弁座部材内流路６２および弁孔６６について、すべて鍛造で成形しているので、切削加工を省略でき、加工時間も極めて短く、低コストで製造することができる。
また、弁座面６１を鍛造により成形しているので、材料内の組織の切断がなく、また、加工硬化がされているので、耐摩耗性が高い。また、弁座面６１に切削痕もなく、平滑な弁座面６１が得られることから、弁体５が弁座面６１に引っ掛かることがなく、この引っ掛かりにともなう作動液の脈動発生などの不具合が発生しにくい。また、弁孔６６を打ち抜くときに、弁座面６１側から打ち抜くので、弁座面６１と弁孔６６のつながり部分にバリが発生せず、自然になだらかにつながるため、弁孔６６を通過する作動液がスムーズに流れることができる。 Thus, the valve seat member 6 in the normally open solenoid valve 1 of the present embodiment is formed by forging all of the valve seat surface 61, the valve seat member internal flow path 62, and the valve hole 66, which are main parts. Therefore, the cutting process can be omitted, the processing time is extremely short, and it can be manufactured at a low cost.
Further, since the valve seat surface 61 is formed by forging, there is no cutting of the structure in the material, and since the work hardening is performed, the wear resistance is high. Further, since the valve seat surface 61 is free of cutting marks and a smooth valve seat surface 61 is obtained, the valve body 5 is not caught on the valve seat surface 61, and there is a problem such as the occurrence of pulsation of hydraulic fluid accompanying this catching. Is unlikely to occur. Further, when the valve hole 66 is punched out, it is punched from the valve seat surface 61 side. Therefore, no burr is generated at the connecting portion between the valve seat surface 61 and the valve hole 66, and the valve hole 66 passes through the valve hole 66 naturally. The working fluid can flow smoothly.

また、ボディ部３１の内周３１ａに圧入される外周６７も、鍛造工程で実施できるので、高精度な外径６７を、同じ工程で作ることができ、低コスト化を達成することができる。   Moreover, since the outer periphery 67 press-fitted into the inner periphery 31a of the body part 31 can also be implemented in the forging process, a highly accurate outer diameter 67 can be made in the same process, and cost reduction can be achieved.

以上に本発明の実施形態について説明したが、本発明は前記した実施形態に限定されず適宜変更して実施することができる。
例えば、前記実施形態においては、コイル４２に流す電流値に応じて、作動差圧を変化させるリニアソレノイドバルブに本発明を適用したが、作動差圧を変化させない常開型電磁弁であっても構わない。例えば、図３は、他の形態の常開型電磁弁の縦断面図である。
図３の常開型電磁弁１′について、図１の常開型電磁弁１と異なる部分についてのみ説明する。常開型電磁弁１′は、前記した常開型電磁弁１に設けられていた凸部７２と凹部３６が無く、可動コア７の下端面７１が平坦に形成され、固定コア３の上端面も平坦に形成されている。また、弁座部材６の中心に形成された弁座部材内流路６２には、弁座部材内流路６２を絞るオリフィス６８が配置されている。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be implemented with appropriate modifications.
For example, in the above-described embodiment, the present invention is applied to the linear solenoid valve that changes the operating differential pressure in accordance with the value of the current flowing through the coil 42, but even a normally open solenoid valve that does not change the operating differential pressure. I do not care. For example, FIG. 3 is a longitudinal sectional view of a normally open solenoid valve of another form.
Only the parts different from the normally open solenoid valve 1 of FIG. 1 will be described for the normally open solenoid valve 1 ′ of FIG. 3. The normally open solenoid valve 1 ′ does not have the convex portion 72 and the concave portion 36 provided in the above-described normally open solenoid valve 1, the lower end surface 71 of the movable core 7 is formed flat, and the upper end surface of the fixed core 3. Is also formed flat. In addition, an orifice 68 for restricting the valve seat member flow path 62 is disposed in the valve seat member flow path 62 formed at the center of the valve seat member 6.

このような常開型電磁弁１′においても、弁座部材６の、弁座面６１、弁座部材内流路６２、弁孔６６および外周６７を鍛造により成形することにより、表面精度が良好で、耐摩耗性も高く、かつ低コストで製造することができる。   Even in such a normally open type electromagnetic valve 1 ′, the surface accuracy is good by forging the valve seat surface 61, the valve seat member internal passage 62, the valve hole 66 and the outer periphery 67 of the valve seat member 6. In addition, it has high wear resistance and can be manufactured at low cost.

前記実施形態においては、チェック弁として戻り流路６３を設けたが、戻り流路６３を設けるのは任意であり、特に必要がなければこれを加工せず、鍛造工程のみで弁座部材６を成形してもよい。   In the above embodiment, the return flow path 63 is provided as a check valve. However, the return flow path 63 is optional. If not particularly necessary, the return flow path 63 is not processed. You may shape | mold.

また、前記実施形態においては、常開型の電磁弁のみを例示したが、円柱状の外径を有し、弁座面６１、弁座部材内流路６２、および弁孔６６に相当する部位を有する弁座部材を用いる電磁弁であれば、常閉型の電磁弁についても本発明を適用することができる。   Moreover, in the said embodiment, although only the normally open type electromagnetic valve was illustrated, it has a cylindrical outer diameter, and the site | part corresponded to the valve seat surface 61, the valve seat member internal flow path 62, and the valve hole 66 If it is an electromagnetic valve using the valve seat member which has this invention, this invention is applicable also to a normally closed type electromagnetic valve.

実施形態に係る常開型電磁弁を示す縦断面図である。It is a longitudinal section showing a normally open type electromagnetic valve concerning an embodiment. 弁座部材の製造工程を説明する図であり、（ａ）は素材形状、（ｂ）は主成形加工工程、（ｃ）は主成形加工後、（ｄ）は打ち抜き加工を示す。It is a figure explaining the manufacturing process of a valve seat member, (a) is a raw material shape, (b) is a main shaping | molding process, (c) is after a main shaping | molding process, (d) shows punching. 他の形態の電磁弁の縦断面図である。It is a longitudinal cross-sectional view of the electromagnetic valve of another form.

符号の説明Explanation of symbols

１ 常開型電磁弁
３ 固定コア
４ コイルユニット
５ 弁体
６ 弁座部材
７ 可動コア
３１ ボディ部
３２ コア部
４２ コイル
６１ 弁座面
６２ 弁座部材内流路
６３ 戻り流路
６４ ボール弁
６５ 下面
６６ 弁孔
６７ 外周
６９ 上面
Ｒ（Ｒ１，Ｒ２） 流路 DESCRIPTION OF SYMBOLS 1 Normally open type electromagnetic valve 3 Fixed core 4 Coil unit 5 Valve body 6 Valve seat member 7 Movable core 31 Body part 32 Core part 42 Coil 61 Valve seat surface 62 Valve seat member internal flow path 63 Return flow path 64 Ball valve 65 Lower surface 66 valve hole 67 outer periphery 69 upper surface R (R1, R2) flow path

Claims (2)

固定コアと、当該固定コアに対して進退可能に配置された可動コアと、電流が流れることで前記固定コアおよび前記可動コアを互いに引き付けるための磁界を発生するコイルと、前記可動コアと一体に移動するよう配置された弁体と、前記弁体と当接して流路を閉塞可能な弁座面を有する弁座部材とを備え、前記弁体の前記弁座面への進退移動により、前記流路を開閉する電磁弁であって、
前記弁座部材は、
略円柱状の外形を有して、上面に前記弁座面が形成され、
下面中央から上方へ延びる前記流路の一部を形成する弁座部材内流路と、
前記弁座面の底部と前記弁座部材内流路とを連通する前記弁座部材内流路より小径な弁孔とを備え、
前記弁座面、前記弁座部材内流路および前記弁孔を含めて鍛造により成形されたことを特徴とする電磁弁。 A fixed core, a movable core disposed so as to be movable back and forth with respect to the fixed core, a coil that generates a magnetic field for attracting the fixed core and the movable core to each other when an electric current flows, and the movable core; A valve body arranged to move, and a valve seat member having a valve seat surface capable of closing the flow path in contact with the valve body, and by moving the valve body back and forth to the valve seat surface, A solenoid valve for opening and closing a flow path,
The valve seat member is
Having a substantially cylindrical outer shape, the valve seat surface is formed on the upper surface;
A flow passage in the valve seat member that forms part of the flow passage extending upward from the center of the lower surface;
A valve hole having a smaller diameter than the flow passage in the valve seat member communicating the bottom of the valve seat surface and the flow passage in the valve seat member;
An electromagnetic valve formed by forging including the valve seat surface, the flow passage in the valve seat member and the valve hole. 前記弁座部材は、外周部分において他の部品に圧入され、当該外周部分も鍛造により成形されたことを特徴とする請求項１に記載の電磁弁。   The electromagnetic valve according to claim 1, wherein the valve seat member is press-fitted into another part at an outer peripheral portion, and the outer peripheral portion is also formed by forging.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013100914A (en) * 2013-02-12 2013-05-23 Nippon Soken Inc Solenoid valve

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH055470A (en) * 1991-06-28 1993-01-14 Hitachi Ltd Nozzle with valve seat and manufacture thereof and solenoid valve
JPH1182808A (en) * 1997-08-29 1999-03-26 Unisia Jecs Corp Plug member for hydraulic equipment
JPH11132342A (en) * 1997-10-30 1999-05-21 Koyo Seiko Co Ltd Check valve
JP2005132347A (en) * 2003-10-10 2005-05-26 Advics:Kk Braking fluid control device
JP2006307985A (en) * 2005-04-28 2006-11-09 Nissin Kogyo Co Ltd Solenoid valve

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH055470A (en) * 1991-06-28 1993-01-14 Hitachi Ltd Nozzle with valve seat and manufacture thereof and solenoid valve
JPH1182808A (en) * 1997-08-29 1999-03-26 Unisia Jecs Corp Plug member for hydraulic equipment
JPH11132342A (en) * 1997-10-30 1999-05-21 Koyo Seiko Co Ltd Check valve
JP2005132347A (en) * 2003-10-10 2005-05-26 Advics:Kk Braking fluid control device
JP2006307985A (en) * 2005-04-28 2006-11-09 Nissin Kogyo Co Ltd Solenoid valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013100914A (en) * 2013-02-12 2013-05-23 Nippon Soken Inc Solenoid valve

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