JP2008281043A - Normally-opened solenoid valve - Google Patents

Normally-opened solenoid valve Download PDF

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JP2008281043A
JP2008281043A JP2007124146A JP2007124146A JP2008281043A JP 2008281043 A JP2008281043 A JP 2008281043A JP 2007124146 A JP2007124146 A JP 2007124146A JP 2007124146 A JP2007124146 A JP 2007124146A JP 2008281043 A JP2008281043 A JP 2008281043A
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valve
valve seat
seat member
valve body
movable core
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Kazuhiro Tagata
和宏 田方
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 normally-opened solenoid valve preventing closure of a passage by movement of a valve seat member. <P>SOLUTION: This normally-opened solenoid valve is provided with: a tubular body part 31; the valve seat member 6 fixed by being pressed in the body part 31; and a valve element 5 blocking/opening a passage formed in the valve seat member 6 by contacting/separating to/from the valve seat member 6. A facing part (step part 31b) facing the upper end surface 6a of the valve seat member 6 is formed on the inside surface of the body part 31, and the distance α between the facing part and the upper end surface 6a of the valve seat member 6 is set smaller than a stroke amount β of the valve element 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、筒状のボディ部内に可動コアと反対側から圧入により固定される弁座部材を備える常開型電磁弁に関する。   The present invention relates to a normally open electromagnetic valve including a valve seat member that is fixed in a cylindrical body portion by press-fitting from a side opposite to a movable core.

一般に、車両用のアンチロックブレーキ装置などの流体の流れを制御する装置には、電磁弁が適宜設けられている。このような電磁弁としては、従来、可動コアと、筒状のボディ部と、ボディ部内に可動コアと反対側から圧入により固定される弁座部材と、弁座部材に対して当接・離間することで弁座部材に形成された流路を遮断・開放する弁体部材とを備えた常開型電磁弁が知られている（特許文献１参照）。   Generally, an electromagnetic valve is appropriately provided in a device that controls the flow of fluid, such as an antilock brake device for a vehicle. Conventionally, as such an electromagnetic valve, a movable core, a cylindrical body portion, a valve seat member fixed by press-fitting in the body portion from the opposite side to the movable core, and contact and separation with respect to the valve seat member Thus, a normally-open electromagnetic valve is known that includes a valve body member that blocks and opens a flow path formed in the valve seat member (see Patent Document 1).

具体的に、常開型電磁弁は、ボディ部の弁体部材側の端部の外周面に嵌合する有底筒状のガイド筒を有しており、このガイド筒の底面と前記した弁座部材との間には、弁座部材側から順に、スプリング、弁体部材および可動コアが配設されている。また、ボディ部の弁体部材側の端部の周囲には、可動コアを磁力によって移動させるための励磁コイルが配設されている。   Specifically, the normally open solenoid valve has a bottomed cylindrical guide tube that fits to the outer peripheral surface of the end of the body portion on the valve body member side, and the bottom surface of the guide tube and the valve described above Between the seat member, a spring, a valve body member, and a movable core are disposed in this order from the valve seat member side. An exciting coil for moving the movable core by magnetic force is disposed around the end of the body portion on the valve body member side.

そして、このような常開型電磁弁では、通常時においては、スプリングによって弁体部材および可動コアがガイド筒の底面側に押し付けられることで、弁体部材と弁座部材とが所定距離（ストローク量）だけ離間した状態となる。また、励磁コイルを励磁させて可動コアを磁力によって移動させると、この可動コアとともに弁体部材が、前記した所定のストローク量で移動して、弁座部材に当接するようになっている。   In such a normally open type electromagnetic valve, in normal times, the valve body member and the movable core are pressed against the bottom surface side of the guide cylinder by a spring, so that the valve body member and the valve seat member have a predetermined distance (stroke). Amount). Further, when the exciting coil is excited and the movable core is moved by magnetic force, the valve body member moves together with the movable core by the predetermined stroke amount and comes into contact with the valve seat member.

特開２００５−１３２３４７号公報JP 2005-132347 A

しかしながら、前記した従来技術では、弁座部材がボディ部の円筒状の内面に可動コアと反対側から圧入されているだけなので、閉弁時（励磁時）において弁座部材の弁体部材とは反対側が異常に高圧となると、弁座部材がガイド筒側に向かって弁体部材とともに移動するおそれがある。そして、このように弁座部材および弁体部材が移動していき、可動コアがガイド筒の底面と当接することで止まると、弁座部材と弁体部材とが閉弁状態のままとなり、その後開放できなくなるおそれがあった。   However, in the above-described prior art, the valve seat member is only press-fitted into the cylindrical inner surface of the body portion from the side opposite to the movable core. If the opposite side becomes abnormally high in pressure, the valve seat member may move together with the valve body member toward the guide tube side. When the valve seat member and the valve body member move in this way and stop when the movable core comes into contact with the bottom surface of the guide cylinder, the valve seat member and the valve body member remain in the closed state, and thereafter There was a risk that it could not be opened.

なお、この問題に対し、ボディ部の内面にストッパを設け、このストッパに当接するように弁座部材を圧入してセットすることで、弁座部材の弁体部材側への移動を防止することが考えられる。しかしながら、この場合、ストッパや弁体部材などの各部品の公差の集積の影響によって、弁体部材と弁座部材との間の距離を一定にすることができず、所定のストローク量を確保することができなくなるおそれがあった。   For this problem, a stopper is provided on the inner surface of the body portion, and the valve seat member is press-fitted and set so as to contact the stopper, thereby preventing the valve seat member from moving toward the valve body member. Can be considered. However, in this case, the distance between the valve body member and the valve seat member cannot be made constant due to the effect of tolerance accumulation of each component such as the stopper and the valve body member, and a predetermined stroke amount is secured. There was a risk that it would be impossible.

そこで、本発明は、弁座部材の移動による流路の閉塞を防止することができる常開型電磁弁を提供することを主たる目的とする。   Then, this invention sets it as the main objective to provide the normally open type | mold solenoid valve which can prevent the obstruction | occlusion of the flow path by the movement of a valve seat member.

前記課題を解決する本発明は、可動コアと、筒状のボディ部と、前記ボディ部内に前記可動コアと反対側から圧入により固定される弁座部材と、前記可動コアとともに移動し、前記弁座部材に対して当接・離間することで前記弁座部材に形成された流路を遮断・開放する弁体部材と、前記弁座部材と前記弁体部材とを離間させる方向に付勢する弾性部材と、前記弾性部材の付勢力に抗して前記可動コアを磁力により移動させる固定コアと、前記固定コアを励磁するコイルと、を備えた常開型電磁弁であって、前記ボディ部の内面に、前記弁座部材の前記弁体部材側の端面と非接触状態で対向する対向部を設け、前記対向部と前記弁座部材の端面との間の距離が、前記弁体部材のストローク量よりも小さくなるように設定されることを特徴とする。   The present invention that solves the above-described problems includes a movable core, a cylindrical body portion, a valve seat member that is fixed in the body portion by press-fitting from the opposite side of the movable core, and moves together with the movable core, A valve body member that shuts off and opens a flow path formed in the valve seat member by abutting and separating from the seat member, and biasing the valve seat member and the valve body member in a separating direction. A normally open solenoid valve comprising: an elastic member; a fixed core that moves the movable core by a magnetic force against an urging force of the elastic member; and a coil that excites the fixed core, the body portion An opposing portion that is opposed to the end face of the valve seat member on the valve body member side in a non-contact state is provided on the inner surface of the valve seat member, and a distance between the facing portion and the end face of the valve seat member is It is characterized by being set to be smaller than the stroke amount. .

ここで、「ストローク量」とは、初期のストローク量を意味する。   Here, the “stroke amount” means an initial stroke amount.

本発明によれば、仮に閉弁時において弁座部材の弁体部材とは反対側が異常に高圧となった場合であっても、弁座部材は、弁体部材のストローク量よりも短い距離だけ移動した後、対向部に当接して止まる。そのため、その後、固定コアの励磁を解除しても、弾性部材によって弁体部材と弁座部材とが初期のストローク量よりも短い距離ではあるが確実に離され、流路が確実に開放されることとなる。   According to the present invention, even when the valve seat member opposite to the valve body member becomes abnormally high when the valve is closed, the valve seat member is only a distance shorter than the stroke amount of the valve body member. After moving, it abuts against the opposing part and stops. Therefore, even if the excitation of the fixed core is released thereafter, the valve member and the valve seat member are reliably separated by the elastic member, although the distance is shorter than the initial stroke amount, and the flow path is reliably opened. It will be.

また、前記対向部と前記弁座部材の端面との間の距離は、前記弁体部材のストローク量に関係する各部品の公差の集積よりも大きくなるように設定されるのが望ましい。   Further, it is desirable that the distance between the facing portion and the end face of the valve seat member is set to be larger than the accumulation of tolerances of the parts related to the stroke amount of the valve body member.

これによれば、対向部と弁座部材の端面との間の距離が各部品の公差の集積よりも大きくなるように設定されているので、例えば可動コアおよび弁体部材が公差の範囲内で最も短く製造されてしまった場合であっても、弁座部材と弁体部材との間が所定のストローク量となるように、弁座部材を弁体部材まで近付けることができる。すなわち、所定のストローク量となるように弁座部材を弁体部材に対して近付ける際に、対向部で弁座部材の移動が邪魔されることがないので、所定のストローク量を確実に確保することができる。   According to this, since the distance between the facing portion and the end face of the valve seat member is set to be larger than the tolerance accumulation of each component, for example, the movable core and the valve body member are within the tolerance range. Even in the case of the shortest production, the valve seat member can be brought close to the valve body member such that a predetermined stroke amount is provided between the valve seat member and the valve body member. That is, when the valve seat member is brought close to the valve body member so as to have a predetermined stroke amount, the movement of the valve seat member is not obstructed by the facing portion, so that the predetermined stroke amount is reliably ensured. be able to.

また、前記ボディ部には、前記固定コアが一体に設けられるのが望ましい。   In addition, it is desirable that the fixed core is integrally provided in the body portion.

これによれば、固定コアがボディ部に一体に設けられるので、部品点数を削減して、コストの低減を図ることができる。   According to this, since the fixed core is provided integrally with the body portion, the number of parts can be reduced and the cost can be reduced.

本発明によれば、対向部と弁座部材の端面との間の距離が弁体部材のストローク量よりも小さくなるように設定されているので、弁座部材の移動による流路の閉塞を防止することができる。   According to the present invention, since the distance between the facing portion and the end face of the valve seat member is set to be smaller than the stroke amount of the valve body member, the flow path is prevented from being blocked by the movement of the valve seat member. can do.

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。なお、以下の説明においては、常開型電磁弁１の基本構造を説明した後、本発明の特徴部分の構造を詳細に説明することとする。   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. In the following description, after describing the basic structure of the normally open solenoid valve 1, the structure of the characteristic part of the present invention will be described in detail.

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、この状態からコイルユニット４への通電が遮断されると、リターンスプリング８１によって、弁体５が弁座部材６から離されて、流路Ｒが開放される。 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, when the energization to the coil unit 4 is interrupted from this state, the valve body 5 is separated from the valve seat member 6 by the return spring 81 and the flow path R is opened.

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、テーパ形状からなる拡径部５２ａによりつながっている。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 diameter-enlarged portion 52a having a tapered shape. 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、扁平な円柱形状の部材であり、上面中央に、漏斗状の弁座面６１が形成され、この弁座面６１の底から上下に貫通する流入路６２が形成されている。この流入路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る。また、弁座部材６には、この流入路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、ボディ部３１の内周に可動コア７と反対側から圧入されて固定されている。 The valve seat member 6 is a flat columnar member. A funnel-shaped valve seat surface 61 is formed at the center of the upper surface, and an inflow passage 62 penetrating vertically from the bottom of the valve seat surface 61 is formed. . The inflow passage 62 is a passage through which hydraulic fluid flows into the valve chamber 84 above the valve seat member 6 from below the normally open electromagnetic valve 1. Further, the valve seat member 6 is formed with a return flow path 63 penetrating vertically at a position shifted radially outward from the inflow path 62. 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.
Such a valve seat member 6 is press-fitted and fixed to the inner periphery of the body portion 31 from the side opposite to the movable core 7.

弁座部材６の上面と弁体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弾性部材の一例としてのリターンスプリング８１が配置されている。   Between the upper surface of the valve seat member 6 and the flange portion 54 of the valve body 5, a return spring 81 as an example of an elastic member that generates an urging force for separating 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、その外周部に形成された溝３１ａに対して装着穴Ｂ１の周囲を径方向内側に向けてかしめることで固定されている。また、ボディ部３１の下端は、装着穴Ｂ１のうち、一回り小径に形成された圧入部Ｂ２に圧入されて固定されている。 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 body B and fixed by caulking the periphery of the mounting hole B1 radially inward with respect to a groove 31a formed in the outer peripheral portion thereof. Moreover, the lower end of the body part 31 is press-fitted and fixed to a press-fitting part B2 formed in a small diameter in the mounting hole B1.

コア部３２の内部（詳しくは、コア部３２の上端からボディ部３１の肉厚となった上部にかかる部分）には、リテーナ５６を駆動させるのに最小限のクリアランスを持つ程度の直径の円形断面からなる貫通孔３４が形成されている。そして、この貫通孔３４内には、可動コア７と弁体５とを一体的に動作させるための棒状のリテーナ５６が配置され、このリテーナ５６が貫通孔３４によって摺動自在にガイドされるようになっている。   In the core portion 32 (specifically, a portion extending from the upper end of the core portion 32 to the upper portion where the thickness of the body portion 31 is increased), a circular shape having a diameter with a minimum clearance for driving the retainer 56 is provided. A through hole 34 having a cross section is formed. A rod-like retainer 56 for operating the movable core 7 and the valve body 5 integrally is disposed in the through hole 34, and the retainer 56 is slidably guided by the through hole 34. It has become.

リテーナ５６は、下端面に有底円筒状の接続穴５７が形成され、この接続穴５７に弁体５の接続ピン５５が圧入されて弁体５と一体的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。   The retainer 56 is formed with a bottomed cylindrical connection hole 57 on the lower end surface, and the connection pin 55 of the valve body 5 is press-fitted into the connection hole 57 so as to move integrally 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.

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。なお、リテーナ５６は、コイル通電時に後述する可動コア７が固定コア３に磁力で引き付けられることで可動コア７と一体的に下方へ移動し、コイル通電遮断時にリターンスプリング８１の復帰力により可動コア７と一体的に上方へ移動するようになっている。ここで、リテーナ５６および弁体５は、弁体部材の一例に相当する。   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. The retainer 56 moves downward integrally with the movable core 7 when a movable core 7 described later is attracted to the fixed core 3 by a magnetic force when the coil is energized. 7 and move upward together. Here, the retainer 56 and the valve body 5 correspond to an example of a valve body member.

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、リターンスプリング８１の付勢力に抗して可動コア７を引き付けて弁を閉じる機能を果たす。   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 against the urging force of the return spring 81 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溝７３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。   The movable core 7 is a columnar member made of a magnetic material disposed on the retainer 56. A groove 73 formed over the entire length is formed on the side surface of the movable core 7, and when the movable core 7 moves up and down, the working fluid above and below the movable core 7 can be moved to move the movable core 7. 7 movement is smooth.

コア部３２には、有底円筒状のガイド筒８６が嵌合および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。   A bottomed cylindrical guide tube 86 is fixed to the core portion 32 by fitting and 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.

次に、本発明の特徴部分である弁座部材６周りの構造について説明する。参照する図面において、図２は、弁座部材回りの構造を示す拡大断面図である。   Next, the structure around the valve seat member 6 which is a characteristic part of the present invention will be described. In the drawings to be referred to, FIG. 2 is an enlarged sectional view showing a structure around the valve seat member.

図２に示すように、ボディ部３１のうち弁座部材６が取り付けられる部分には、ボディ部３１の内面から内側へ迫り出した対向部の一例としての段差部３１ｂが形成されている。そして、この段差部３１ｂの段差面（下面）は、弁座部材６の上端面６ａに対向しており、その間の距離αは、弁体５の初期のストローク量βよりも小さく設定されている。さらに、距離αは、弁体５のストローク量に関係する各部品の公差の集積よりも大きくなるように設定されている。ここで、「弁体５のストローク量に関係する各部品」とは、例えば、弁体５、リテーナ５６、可動コア７、ガイド筒８６および固定コア３を示す。また、「公差」とは、弁体５、リテーナ５６および可動コア７に関しては、その全長における基準寸法よりもマイナス側（最小許容寸法側）の公差をいい、ガイド筒８６および固定コア３に関しては、これら２部品を取り付けたときのガイド筒８６の底部（可動コア７との当接部）から固定コア３の段差部３１ｂの段差面までの距離における基準寸法よりもプラス側（最大許容寸法側）の公差をいう。すなわち、弁体５の初期のストローク量αの増加に影響を及ぼす公差をいう。   As shown in FIG. 2, a step portion 31 b as an example of a facing portion that protrudes inward from the inner surface of the body portion 31 is formed in a portion of the body portion 31 to which the valve seat member 6 is attached. And the level | step difference surface (lower surface) of this level | step-difference part 31b has opposed the upper end surface 6a of the valve-seat member 6, and the distance (alpha) between them is set smaller than the initial stroke amount (beta) of the valve body 5. FIG. . Furthermore, the distance α is set to be larger than the accumulation of tolerances of the parts related to the stroke amount of the valve body 5. Here, “each part related to the stroke amount of the valve body 5” indicates, for example, the valve body 5, the retainer 56, the movable core 7, the guide cylinder 86, and the fixed core 3. The “tolerance” means a tolerance on the negative side (minimum allowable dimension side) with respect to the reference length in the entire length of the valve body 5, the retainer 56 and the movable core 7, and regarding the guide cylinder 86 and the fixed core 3. Further, the reference side in the distance from the bottom part of the guide tube 86 (the contact part with the movable core 7) to the stepped surface of the stepped part 31b of the fixed core 3 when these two parts are attached is the plus side (the maximum allowable dimension side) ) Tolerance. That is, it means a tolerance that affects an increase in the initial stroke amount α of the valve body 5.

次に、閉弁時に弁座部材６の下側が異常に高圧となった場合における段差部３１ｂの作用について説明する。参照する図面において、図３は、弁座面に弁体が当接した状態を示す拡大断面図（ａ）と、弁座部材が段差部に当接した状態を示す拡大断面図（ｂ）と、図３（ｂ）の状態から開弁されたときの状態を示す拡大断面図（ｃ）である。   Next, an operation of the step portion 31b when the lower side of the valve seat member 6 becomes abnormally high when the valve is closed will be described. In the drawings to be referred to, FIG. 3 is an enlarged cross-sectional view (a) showing a state in which the valve body is in contact with the valve seat surface, and an enlarged cross-sectional view (b) showing a state in which the valve seat member is in contact with the stepped portion. FIG. 4 is an enlarged cross-sectional view (c) showing a state when the valve is opened from the state of FIG.

図３（ａ）に示すように、弁体５が弁座部材６の弁座面６１に当接する閉弁時において、弁座部材６の下側が異常に高圧となった場合には、弁座部材６へ上方に向かう力が加えられ、弁座部材６が上方に移動する。そして、このように移動する弁座部材６は、図３（ｂ）に示すように、段差部３１ｂと当接することで、弁体５のストローク量βよりも短い距離αだけ移動してから止められることとなる。そのため、その後、コイル通電を遮断すると、図３（ｃ）に示すように、リターンスプリング８１の復帰力によって、弁体５が弁座部材６から距離（β−α）だけ離されて、確実に流路が開放される。   As shown in FIG. 3 (a), when the valve body 5 is in contact with the valve seat surface 61 of the valve seat member 6 and the lower side of the valve seat member 6 becomes abnormally high in pressure, the valve seat An upward force is applied to the member 6, and the valve seat member 6 moves upward. Then, as shown in FIG. 3B, the valve seat member 6 that moves in this manner is brought into contact with the stepped portion 31b to move after a distance α shorter than the stroke amount β of the valve body 5 and then stop. Will be. Therefore, when the coil energization is interrupted thereafter, the valve body 5 is separated from the valve seat member 6 by a distance (β−α) by the return force of the return spring 81 as shown in FIG. The flow path is opened.

以上によれば、本実施形態において以下のような効果を得ることができる。
段差部３１ｂと弁座部材６の上端面６ａとの間の距離αが弁体５のストローク量βよりも小さくなるように設定されているので、弁座部材６の移動による流路の閉塞を防止することができる。 According to the above, the following effects can be obtained in the present embodiment.
Since the distance α between the step portion 31 b and the upper end surface 6 a of the valve seat member 6 is set to be smaller than the stroke amount β of the valve body 5, the flow path is blocked by the movement of the valve seat member 6. Can be prevented.

段差部３１ｂと弁座部材６の上端面６ａとの間の距離αが各部品の公差の集積よりも大きくなるように設定されているので、例えば可動コア７、弁体５およびリテーナ５６が最も短く製造されてしまった場合であっても、弁座部材６と弁体５との間が所定のストローク量となるように、弁座部材６を弁体５まで近付けることができる。すなわち、所定のストローク量となるように弁座部材６を弁体５に対して近付ける際に、段差部３１ｂで弁座部材６の移動が邪魔されることがないので、所定のストローク量を確実に確保することができる。
コア部３２がボディ部３１に一体に設けられるので、部品点数を削減して、コストの低減を図ることができる。 Since the distance α between the stepped portion 31b and the upper end surface 6a of the valve seat member 6 is set to be larger than the accumulation of tolerances of each component, for example, the movable core 7, the valve body 5 and the retainer 56 are the most. Even if it is manufactured short, the valve seat member 6 can be brought close to the valve body 5 so that a predetermined stroke amount is provided between the valve seat member 6 and the valve body 5. That is, when the valve seat member 6 is brought close to the valve body 5 so as to have a predetermined stroke amount, the movement of the valve seat member 6 is not obstructed by the step portion 31b. Can be secured.
Since the core part 32 is provided integrally with the body part 31, the number of parts can be reduced and the cost can be reduced.

なお、本発明は前記実施形態に限定されることなく、以下に例示するように様々な形態で利用できる。
前記実施形態では、対向部としてボディ部３１に一体に形成される段差部３１ｂを採用したが、本発明はこれに限定されず、例えばボディ部３１とは別体となる部品を対向部として採用してもよい。 In addition, this invention is not limited to the said embodiment, It can utilize with various forms so that it may illustrate below.
In the above embodiment, the step portion 31b formed integrally with the body portion 31 is employed as the facing portion. However, the present invention is not limited to this, and for example, a component that is separate from the body portion 31 is employed as the facing portion. May be.

前記実施形態では、コア部３２とボディ部３１とを一体に構成したが、本発明はこれに限定されず、別体であってもよい。
前記実施形態では、リテーナ５６と弁体５を別体としたが、本発明はこれに限定されず、一体としてもよい。 In the said embodiment, although the core part 32 and the body part 31 were comprised integrally, this invention is not limited to this, A separate body may be sufficient.
In the said embodiment, although the retainer 56 and the valve body 5 were made into the different body, this invention is not limited to this, It is good also as integral.

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. 弁座部材回りの構造を示す拡大断面図である。It is an expanded sectional view showing the structure around a valve seat member. 弁座面に弁体が当接した状態を示す拡大断面図（ａ）と、弁座部材が段差部に当接した状態を示す拡大断面図（ｂ）と、図３（ｂ）の状態から開弁されたときの状態を示す拡大断面図（ｃ）である。From the enlarged sectional view (a) showing the state in which the valve body is in contact with the valve seat surface, the enlarged sectional view (b) showing the state in which the valve seat member is in contact with the stepped portion, and the state of FIG. 3 (b) It is an expanded sectional view (c) which shows a state when it is opened.

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（弁体部材）
６ 弁座部材
６ａ 上端面
７ 可動コア
３１ ボディ部
３１ｂ 段差部（対向部）
３２ コア部
４２ コイル
５６ リテーナ（弁体部材）
６１ 弁座面
６２ 流入路
８１ リターンスプリング（弾性部材）
８６ ガイド筒
1 Normally Opened Solenoid Valve 3 Fixed Core 4 Coil Unit 5 Valve Body (Valve Body Member)
6 Valve seat member 6a Upper end surface 7 Movable core 31 Body part 31b Step part (opposing part)
32 Core part 42 Coil 56 Retainer (valve element)
61 Valve seat surface 62 Inflow passage 81 Return spring (elastic member)
86 Guide tube

Claims (3)

可動コアと、
筒状のボディ部と、
前記ボディ部内に前記可動コアと反対側から圧入により固定される弁座部材と、
前記可動コアとともに移動し、前記弁座部材に対して当接・離間することで前記弁座部材に形成された流路を遮断・開放する弁体部材と、
前記弁座部材と前記弁体部材とを離間させる方向に付勢する弾性部材と、
前記弾性部材の付勢力に抗して前記可動コアを磁力により移動させる固定コアと、
前記固定コアを励磁するコイルと、を備えた常開型電磁弁であって、
前記ボディ部の内面に、前記弁座部材の前記弁体部材側の端面と非接触状態で対向する対向部を設け、
前記対向部と前記弁座部材の端面との間の距離が、前記弁体部材のストローク量よりも小さくなるように設定されることを特徴とする常開型電磁弁。 A movable core,
A tubular body,
A valve seat member fixed by press-fitting into the body portion from the opposite side of the movable core;
A valve body member that moves together with the movable core, and shuts off and opens a flow path formed in the valve seat member by contacting and separating from the valve seat member;
An elastic member that urges the valve seat member and the valve body member in a direction away from each other;
A fixed core that moves the movable core by a magnetic force against a biasing force of the elastic member;
A normally open solenoid valve comprising a coil for exciting the fixed core,
Provided on the inner surface of the body portion is a facing portion that faces the end face of the valve seat member on the valve body member side in a non-contact state,
The normally open solenoid valve, wherein a distance between the facing portion and the end face of the valve seat member is set to be smaller than a stroke amount of the valve body member. 請求項１に記載の常開型電磁弁において、
前記対向部と前記弁座部材の端面との間の距離は、前記弁体部材のストローク量に関係する各部品の公差の集積よりも大きくなるように設定されることを特徴とする常開型電磁弁。 The normally open solenoid valve according to claim 1,
The distance between the facing portion and the end face of the valve seat member is set to be larger than the accumulation of tolerances of the parts related to the stroke amount of the valve body member. solenoid valve. 請求項１または請求項２に記載の常開型電磁弁において、
前記ボディ部に、前記固定コアが一体に設けられることを特徴とする常開型電磁弁。
The normally open solenoid valve according to claim 1 or 2,
The normally open solenoid valve characterized in that the fixed core is provided integrally with the body portion.
JP2007124146A 2007-05-09 2007-05-09 Normally-opened solenoid valve Pending JP2008281043A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014081013A (en) * 2012-10-15 2014-05-08 Nissin Kogyo Co Ltd Normally open type electromagnetic valve

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05263959A (en) * 1992-03-13 1993-10-12 Nissin Kogyo Kk Selector valve and assembling method thereof
JPH08152076A (en) * 1994-11-29 1996-06-11 Nissin Kogyo Kk Solenoid valve device
JP2000179732A (en) * 1998-12-21 2000-06-27 Nissin Kogyo Co Ltd Solenoid valve
JP2001146981A (en) * 1999-09-08 2001-05-29 Nissin Kogyo Co Ltd Solenoid driven part
JP2005098491A (en) * 2003-08-18 2005-04-14 Denso Corp Solenoid controlled valve
JP2006103440A (en) * 2004-10-04 2006-04-20 Honda Motor Co Ltd Anti-lock brake controlling device of vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05263959A (en) * 1992-03-13 1993-10-12 Nissin Kogyo Kk Selector valve and assembling method thereof
JPH08152076A (en) * 1994-11-29 1996-06-11 Nissin Kogyo Kk Solenoid valve device
JP2000179732A (en) * 1998-12-21 2000-06-27 Nissin Kogyo Co Ltd Solenoid valve
JP2001146981A (en) * 1999-09-08 2001-05-29 Nissin Kogyo Co Ltd Solenoid driven part
JP2005098491A (en) * 2003-08-18 2005-04-14 Denso Corp Solenoid controlled valve
JP2006103440A (en) * 2004-10-04 2006-04-20 Honda Motor Co Ltd Anti-lock brake controlling device of vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014081013A (en) * 2012-10-15 2014-05-08 Nissin Kogyo Co Ltd Normally open type electromagnetic valve

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