JP4673831B2 - solenoid valve - Google Patents

solenoid valve Download PDF

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JP4673831B2
JP4673831B2 JP2006354652A JP2006354652A JP4673831B2 JP 4673831 B2 JP4673831 B2 JP 4673831B2 JP 2006354652 A JP2006354652 A JP 2006354652A JP 2006354652 A JP2006354652 A JP 2006354652A JP 4673831 B2 JP4673831 B2 JP 4673831B2
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valve body
body member
valve
valve seat
flow path
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JP2008164068A (en
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和宏 田方
桂太 村井
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Nissin Kogyo Co Ltd
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Description

本発明は、弁体を弁座部材に対して進退させることで流路の開閉を行う電磁弁に関する。   The present invention relates to an electromagnetic valve that opens and closes a flow path by moving a valve body forward and backward with respect to a valve seat member.

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、常閉型電磁弁や常開型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、弁体を備えた可動コアと、弁体との当接により流路を遮断する弁座部材と、可動コアを弁座部材に対して進退させるためのスプリング、固定コアおよびコイルとを備えたものが知られている（特許文献１参照）。   In general, a device that controls the flow of fluid, such as an antilock brake device for a vehicle, is provided with a normally closed solenoid valve or a normally open solenoid valve as appropriate. Conventionally, as such an electromagnetic valve, a movable core provided with a valve body, a valve seat member that blocks a flow path by contact with the valve body, and a spring for moving the movable core forward and backward with respect to the valve seat member A device including a fixed core and a coil is known (see Patent Document 1).

具体的に、特許文献１に開示された常閉型電磁弁は、固定コアと可動コアとの間にスプリングが配設され、このスプリングで可動コアを常時弁座部材側に付勢させる構造となっている。そのため、この常閉型電磁弁では、通常時において、スプリングの付勢力によって弁体と弁座部材が当接して流路が閉塞され、適宜コイルで励磁される固定コアによって可動コアを吸引したときに、弁体が弁座部材から離間して流路が開放される。そして、この常閉型電磁弁では、可動コアの進行方向の前方空間と後方空間を連通するために、可動コアの外周面にこれら前後の空間に連通する連通溝が形成されている。これにより、常閉型電磁弁が開状態から閉状態となるときに、弁体と弁座部材間の液体が連通溝からスムーズに逃げて、可動コアの動きがスムーズとなっている。   Specifically, the normally closed solenoid valve disclosed in Patent Document 1 has a structure in which a spring is disposed between the fixed core and the movable core, and the movable core is always biased toward the valve seat member by the spring. It has become. For this reason, in this normally closed solenoid valve, when the valve core and the valve seat member come into contact with each other by the biasing force of the spring, the flow path is closed, and the movable core is attracted by a fixed core that is appropriately excited by a coil. In addition, the valve body is separated from the valve seat member, and the flow path is opened. In this normally closed solenoid valve, in order to communicate the front space and the rear space in the moving direction of the movable core, a communication groove communicating with the front and rear spaces is formed on the outer peripheral surface of the movable core. As a result, when the normally closed solenoid valve changes from the open state to the closed state, the liquid between the valve body and the valve seat member smoothly escapes from the communication groove, and the movement of the movable core is smooth.

また、常開型電磁弁は、弁座部材を一体に備えた固定コアを有し、この固定コアと可動コアとの間にスプリングが配設され、このスプリングで可動コアを常時弁座部材から離間させる構造となっている。そのため、この常開型電磁弁では、通常時において、スプリングの付勢力によって弁体と弁座部材が離間して流路が開放され、適宜コイルで励磁される固定コアによって可動コアを吸引したときに、弁体が弁座部材に当接して流路が閉塞される。そして、この常開型電磁弁でも、常閉型電磁弁と同様に、可動コアの前後空間を繋ぐ連通溝が形成されており、これにより、開状態から閉状態となるときに、弁体と弁座部材間の液体が連通溝からスムーズに逃げて、可動コアの動きがスムーズとなっている。   Further, the normally open solenoid valve has a fixed core integrally provided with a valve seat member, and a spring is disposed between the fixed core and the movable core, and the movable core is always moved from the valve seat member by this spring. It is structured to be separated. Therefore, in this normally open type electromagnetic valve, when the valve core and the valve seat member are separated by the biasing force of the spring and the flow path is opened in a normal state, the movable core is attracted by a fixed core that is appropriately excited by a coil. In addition, the valve body comes into contact with the valve seat member and the flow path is closed. And also in this normally open type solenoid valve, like the normally closed type solenoid valve, a communication groove that connects the front and rear spaces of the movable core is formed, so that when the state is changed from the open state to the closed state, The liquid between the valve seat members smoothly escapes from the communication groove, and the movable core moves smoothly.

特開平７−２９１１１１号公報（図５）JP-A-7-291111 (FIG. 5)

しかしながら、従来の技術では、可動コアがスムーズに動くため、電磁弁が閉弁される際、急激に弁体と弁座部材とがぶつかり、異音が発生するという問題があった。   However, in the prior art, since the movable core moves smoothly, there is a problem that when the electromagnetic valve is closed, the valve body and the valve seat member suddenly collide with each other, and abnormal noise is generated.

そこで、本発明は、弁体と弁座部材との衝突による異音の発生を抑制することができる電磁弁を提供することを課題とする。   Then, this invention makes it a subject to provide the solenoid valve which can suppress generation | occurrence | production of the abnormal noise by the collision with a valve body and a valve seat member.

前記課題を解決する本発明は、弁座部材と、前記弁座部材に当接自在に進退する弁体部材と、前記弁体部材に摺接して弁体部材の進退動作をガイドするハウジングと、前記弁体部材の前記弁座部材側の前方空間と前記弁体部材の前方空間とは反対側の後方空間とを連通する連通部と、を備えた電磁弁であって、前記弁体部材が前記弁座部材側に移動する際に前記弁体部材と前記弁座部材との間から押し出された流体が通る流路が、前記弁体部材の移動に伴って徐々に狭まって前記連通部の流路断面積よりも小さな流路断面積となるような絞り部分が、前記弁体部材と前記ハウジングの間に形成されることを特徴とする。 The present invention that solves the above problems includes a valve seat member, a valve body member that advances and retreats so as to be able to come into contact with the valve seat member, a housing that slides on the valve body member and guides the advance and retreat operation of the valve body member, An electromagnetic valve comprising: a front portion of the valve body member on the valve seat member side; and a communication portion that communicates a rear space on the opposite side of the front space of the valve body member, wherein the valve body member is When moving to the valve seat member side, the flow path through which the fluid pushed out from between the valve body member and the valve seat member gradually narrows as the valve body member moves, and the communication portion A throttle portion that has a channel cross-sectional area smaller than the channel cross-sectional area is formed between the valve body member and the housing .

本発明によれば、閉弁時において弁体部材を弁座部材側に移動させると、弁体部材と弁座部材との間の流体が弁体部材によって連通部へ向かって押し出される。このとき、流体の通る流路が、弁体部材の移動に伴って徐々に狭まって連通部の流路断面積よりも小さな流路断面積となることにより、流体が連通部へスムーズに逃げられなくなるので、流体が一時的に弁体部材と弁座部材との間で滞留してダンパとして機能する。そのため、弁体部材と弁座部材の急激な衝突が抑制されて、異音の発生が抑制される。   According to the present invention, when the valve body member is moved toward the valve seat member when the valve is closed, the fluid between the valve body member and the valve seat member is pushed out toward the communicating portion by the valve body member. At this time, the flow path of the fluid gradually narrows with the movement of the valve body member and becomes a flow path cross-sectional area smaller than the flow path cross-sectional area of the communication portion, so that the fluid can smoothly escape to the communication portion. Therefore, the fluid temporarily stays between the valve body member and the valve seat member and functions as a damper. Therefore, a sudden collision between the valve body member and the valve seat member is suppressed, and generation of abnormal noise is suppressed.

具体的な一例を挙げると、前記弁体部材は、前記弁座部材側の部分が小径となる段付き形状に形成されるとともに、その外周面に前記連通部としての溝が形成され、前記弁体部材の小径部分の周囲には、前記弁体部材の進行方向において前記弁体部材の大径部分に対向する流路形成部が設けられ、前記流路が、前記弁体部材の大径部分と前記流路形成部によって構成される。   As a specific example, the valve body member is formed in a stepped shape in which a portion on the valve seat member side has a small diameter, and a groove as the communication portion is formed on an outer peripheral surface thereof. Around the small diameter portion of the body member, there is provided a flow path forming portion that faces the large diameter portion of the valve body member in the traveling direction of the valve body member, and the flow path is a large diameter portion of the valve body member. And the flow path forming part.

これによれば、閉弁時において弁体部材を弁座部材側に移動させると、弁体部材の大径部分が流路形成部に近付いていくことにより、それらの間の流路が徐々に狭まっていく。これにより、流体が連通部へスムーズに逃げられなくなるので、一時的に弁体部材と弁座部材との間で滞留してダンパとして良好に機能し、前記した効果を良好に発揮することができる。   According to this, when the valve body member is moved to the valve seat member side when the valve is closed, the large-diameter portion of the valve body member approaches the flow path forming portion, so that the flow path between them gradually increases. It narrows. As a result, the fluid cannot smoothly escape to the communicating portion, so that it temporarily stays between the valve body member and the valve seat member and functions well as a damper, and the above-described effects can be exhibited well. .

また、本発明は、前記弁体部材を前記弁座部材側へ付勢する弾性部材と、前記弁体部材を前記弾性部材の付勢力に抗して前記弁座部材から離間させる固定コアおよびコイルとを備えた構成、すなわち、本発明に係る電磁弁は、常閉型電磁弁に用いると特に好適である。   The present invention also provides an elastic member for urging the valve body member toward the valve seat member, and a fixed core and a coil for separating the valve body member from the valve seat member against the urging force of the elastic member. The electromagnetic valve according to the present invention is particularly suitable when used in a normally closed electromagnetic valve.

これによれば、閉弁時において、コイルによる固定コアの励磁を解除すると、弾性部材の弾発力によって弁体部材が弁座部材側へ勢いよく移動しようとするが、前記したような徐々に狭まる流路によるダンパ効果によって、その勢いを抑制することができる。そのため、常閉型電磁弁のような特に異音が発生しやすい電磁弁においても、弁体部材と弁座部材の急激な衝突が抑制されて、異音の発生を抑制することができる。   According to this, when the excitation of the fixed core by the coil is released when the valve is closed, the valve body member tends to move toward the valve seat member side by the elastic force of the elastic member. The momentum can be suppressed by the damper effect by the narrowing flow path. Therefore, even in an electromagnetic valve that is particularly susceptible to abnormal noise such as a normally closed electromagnetic valve, a sudden collision between the valve body member and the valve seat member is suppressed, and generation of abnormal noise can be suppressed.

本発明によれば、弁体部材の移動に伴って徐々に狭まる流路によって、弁体部材と弁座部材間の流体がダンパとして機能するので、弁体部材と弁座部材との衝突による異音の発生を抑制することができる。   According to the present invention, the fluid between the valve body member and the valve seat member functions as a damper due to the flow path that gradually narrows as the valve body member moves, so that a difference caused by a collision between the valve body member and the valve seat member is caused. Generation of sound can be suppressed.

［第１の実施形態］
次に、本発明の第１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は第１の実施形態に係る常閉型電磁弁を示す縦断面図であり、図２は可動コアの構造を示す横断面図である。なお、本実施形態では、常閉型電磁弁に本発明を適用したものを説明する。 [First Embodiment]
Next, a first embodiment 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 closed electromagnetic valve according to the first embodiment, and FIG. 2 is a transverse sectional view showing a structure of a movable core. In the present embodiment, a case where the present invention is applied to a normally closed solenoid valve will be described.

図１に示すように、常閉型電磁弁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、ハウジング２、固定コア３、コイルユニット４、弁体部材５および弁座部材６を備えて構成されている。   As shown in FIG. 1, a normally closed 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 housing 2 and a fixed core. 3, the coil unit 4, the valve body member 5, and the valve seat member 6 are comprised.

ハウジング２は、略円筒状のガイド筒２１と、略有底円筒状のボディ部２２とを備えて構成されている。   The housing 2 includes a substantially cylindrical guide tube 21 and a substantially bottomed cylindrical body portion 22.

ガイド筒２１は、円筒状の本体部２１ａを有する他、この本体部２１ａの下端（ボディ部２２側の端）から拡開するように形成される本体部２１ａよりも大径の拡開部２１ｂを有している。そして、このガイド筒２１の本体部２１ａには、固定コア３が嵌合および溶接により固定され、拡開部２１ｂには、ボディ部２２が嵌合および溶接により固定されている。   The guide tube 21 has a cylindrical main body portion 21a, and also has an enlarged portion 21b having a larger diameter than the main body portion 21a formed to expand from the lower end (end on the body portion 22 side) of the main body portion 21a. have. The fixed core 3 is fixed to the main body portion 21a of the guide cylinder 21 by fitting and welding, and the body portion 22 is fixed to the expanding portion 21b by fitting and welding.

ボディ部２２は、円筒状の側壁部２２ａと、底壁部２２ｂとによって略有底円筒状に形成されている。側壁部２２ａは、ガイド筒２１の肉厚よりも厚い所定の厚さで形成されることで、その上端部２２ｃ（開口端部）の内面が、ガイド筒２１の本体部２１ａの内面よりも内側へ位置している。すなわち、本体部２１ａの内面よりも上端部２２ｃの内面が内側にくることで、可動コア５と上端部２２ｃとが対向する。また、側壁部２２ａには、上から順に、外側へ膨出する第１膨出部２２ｄ、ボディ部２２の内外に径方向で連通する複数の貫通孔２２ｅ、内側へ膨出する第２膨出部２２ｆが形成されている。そして、第１膨出部２２ｄは、基体Ｂに固定されるとともに、第２膨出部２２ｆには、弁座部材６が圧入により固定されている。また、底壁部２２ｂには、ボディ部２２の内外に上下方向で連通する１つの貫通孔２２ｇが形成されている。   The body part 22 is formed in a substantially bottomed cylindrical shape by a cylindrical side wall part 22a and a bottom wall part 22b. The side wall portion 22 a is formed with a predetermined thickness that is thicker than the thickness of the guide tube 21, so that the inner surface of the upper end portion 22 c (open end portion) is inside the inner surface of the main body portion 21 a of the guide tube 21. Is located. That is, the movable core 5 and the upper end portion 22c face each other because the inner surface of the upper end portion 22c comes inward from the inner surface of the main body portion 21a. Further, the side wall portion 22a has a first bulging portion 22d bulging outward from the top, a plurality of through holes 22e communicating in the radial direction inside and outside the body portion 22, and a second bulging bulging inward. A portion 22f is formed. The first bulging portion 22d is fixed to the base B, and the valve seat member 6 is fixed to the second bulging portion 22f by press-fitting. The bottom wall portion 22b is formed with one through hole 22g communicating with the inside and outside of the body portion 22 in the vertical direction.

なお、ボディ部２２の第１膨出部２２ｄの下側には、側壁部２２ａに形成される複数の貫通孔２２ｅを覆うフィルタ２３が設けられており、これにより、ボディ部２２内への異物の侵入が抑制されている。   A filter 23 is provided below the first bulging portion 22d of the body portion 22 so as to cover the plurality of through holes 22e formed in the side wall portion 22a, whereby foreign matter entering the body portion 22 is provided. Intrusion is suppressed.

固定コア３は、コイルユニット４で励磁されることにより、弁体部材５を吸引して弁座部材６から離間させるものである。具体的に、固定コア３は、ガイド筒２１の本体部２１ａの内周面と略同じ径で形成される円柱状の本体部３１と、ガイド筒２１の本体部２１ａの外周面と略同じ径で形成される円柱状の拡径部３２とを備えている。そして、この固定コア３は、その本体部３１がガイド筒２１の本体部２１ａに嵌合および溶接により固定され、この状態において、その拡径部３２の外周面がガイド筒２１の本体部２１ａの外周面と略面一となっている。   The fixed core 3 is excited by the coil unit 4 to suck the valve body member 5 away from the valve seat member 6. Specifically, the fixed core 3 has a cylindrical main body portion 31 formed with substantially the same diameter as the inner peripheral surface of the main body portion 21a of the guide tube 21 and a substantially same diameter as the outer peripheral surface of the main body portion 21a of the guide tube 21. And a columnar enlarged diameter portion 32 formed by The main body 31 of the fixed core 3 is fixed to the main body 21 a of the guide cylinder 21 by fitting and welding. In this state, the outer peripheral surface of the enlarged diameter portion 32 is the main body 21 a of the guide cylinder 21. It is substantially flush with the outer peripheral surface.

コイルユニット４は、固定コア３を励磁させるものであり、ガイド筒２１を囲繞するボビン４１と、ボビン４１に巻装されるコイル４２と、ガイド筒２１の両端部間を磁気的に結合するヨーク４３とを備えている。そして、このコイルユニット４では、適宜コイル４２に電流を流すことで、このコイル４２から磁界を発生させて、固定コア３を励磁させている。   The coil unit 4 excites the fixed core 3, and includes a bobbin 41 surrounding the guide cylinder 21, a coil 42 wound around the bobbin 41, and a yoke that magnetically couples both ends of the guide cylinder 21. 43. In the coil unit 4, a current is appropriately passed through the coil 42 to generate a magnetic field from the coil 42 to excite the fixed core 3.

弁体部材５は、弁座部材６に対して進退自在となる可動コア５１と、可動コア５１に固定される弁体５２とを備えて構成されている。   The valve body member 5 includes a movable core 51 that can move forward and backward with respect to the valve seat member 6 and a valve body 52 that is fixed to the movable core 51.

可動コア５１は、略円柱状に形成されており、その下部（弁座部材６側の部分）が小径となる段付き形状に形成されている。具体的に、この可動コア５１は、大径部５１ａと小径部５１ｂとからなり、その大径部５１ａがガイド筒２１の本体部２１ａに摺接し、その小径部５１ｂがボディ部２２の上端部２２ｃの内面から所定の隙間を介して配置されている。そのため、大径部５１ａが可動コア５１の進退方向（上下方向）においてボディ部２２の上端部２２ｃと対向し、小径部５１ｂがボディ部２２の上端部２２ｃで囲繞される。   The movable core 51 is formed in a substantially cylindrical shape, and is formed in a stepped shape in which a lower portion (portion seat member 6 side portion) has a small diameter. Specifically, the movable core 51 includes a large diameter part 51 a and a small diameter part 51 b, the large diameter part 51 a is in sliding contact with the main body part 21 a of the guide cylinder 21, and the small diameter part 51 b is the upper end part of the body part 22. It arrange | positions through the predetermined clearance gap from the inner surface of 22c. Therefore, the large diameter part 51 a faces the upper end part 22 c of the body part 22 in the advancing / retreating direction (vertical direction) of the movable core 51, and the small diameter part 51 b is surrounded by the upper end part 22 c of the body part 22.

また、この可動コア５１の外周面には、その大径部５１ａの上面から小径部５１ｂの下面にかけて連通する連通溝５１ｃが、図２に示すように、三つ周方向に均等に配置されて形成されている。さらに、小径部５１ｂの下面には、下方へ突出する略円筒状の弁体保持部５１ｄが形成されている。また、大径部５１ａの上面には、可動コア５１を弁座部材６側へ向けて付勢するリターンスプリングＲＳを配設するためのスプリング取付穴５１ｅが形成されている。   In addition, on the outer peripheral surface of the movable core 51, communication grooves 51c that communicate from the upper surface of the large-diameter portion 51a to the lower surface of the small-diameter portion 51b are evenly arranged in three circumferential directions as shown in FIG. Is formed. Furthermore, a substantially cylindrical valve body holding portion 51d protruding downward is formed on the lower surface of the small diameter portion 51b. A spring mounting hole 51e is provided on the upper surface of the large-diameter portion 51a for disposing a return spring RS that biases the movable core 51 toward the valve seat member 6 side.

このように可動コア５１が形成されることで、小径部５１ｂとボディ部２２との間に環状の第１流路Ｒ１が形成され、大径部５１ａとボディ部２２との間に環状の第２流路Ｒ２が形成され、連通溝５１ｃとガイド筒２１との間に第３流路Ｒ３が形成される。また、第２流路Ｒ２は、大径部５１ａがボディ部２２の上端部２２ｃと対向していることから、可動コア５１の進退に伴って、その流路断面積が徐々に縮小または拡大するようになっている。ここで、流路断面積が変化する第２流路Ｒ２の一部を構成するボディ部２２の上端部２２ｃは、流路形成部に相当する。   By forming the movable core 51 in this way, an annular first flow path R1 is formed between the small diameter part 51b and the body part 22, and an annular first channel R1 is formed between the large diameter part 51a and the body part 22. Two flow paths R2 are formed, and a third flow path R3 is formed between the communication groove 51c and the guide cylinder 21. Moreover, since the large diameter part 51a has opposed the upper end part 22c of the body part 22, as for the 2nd flow path R2, as the movable core 51 advances and retreats, the flow path cross-sectional area gradually reduces or expands. It is like that. Here, the upper end portion 22c of the body portion 22 constituting a part of the second flow path R2 in which the flow path cross-sectional area changes corresponds to the flow path forming section.

なお、第２流路Ｒ２の流路断面積は、少なくとも可動コア５１が最下点に位置するとき（閉弁時）において、連通溝５１ｃの流路断面積よりも小さくなるように構成されている。これにより、第２流路Ｒ２が、絞り（オリフィス）として機能するようになっている。   The flow path cross-sectional area of the second flow path R2 is configured to be smaller than the flow path cross-sectional area of the communication groove 51c at least when the movable core 51 is positioned at the lowest point (when the valve is closed). Yes. As a result, the second flow path R2 functions as a restriction (orifice).

弁体５２は、球状に形成された部材であり、可動コア５１の下面に形成される弁体保持部５１ｄ内に固着されている。そして、このように可動コア５１の下面に固着される弁体５２は、可動コア５１の進退に伴って、弁座部材６に対して当接自在となっている。   The valve body 52 is a member formed in a spherical shape, and is fixed in a valve body holding portion 51 d formed on the lower surface of the movable core 51. And the valve body 52 fixed to the lower surface of the movable core 51 in this way is freely contactable with the valve seat member 6 as the movable core 51 advances and retreats.

弁座部材６は、有底円筒状に形成された部材であり、その開口が下向きとなるようにボディ部２２の第２膨出部２２ｆに圧入により固定されている。そして、弁座部材６の底壁６１には、弁体５２が当接されるテーパ状の弁座面６２と、この弁座面６２から弁座部材６内に貫通する貫通孔６３とが形成されている。   The valve seat member 6 is a member formed in a bottomed cylindrical shape, and is fixed to the second bulging portion 22f of the body portion 22 by press-fitting so that the opening thereof faces downward. The bottom wall 61 of the valve seat member 6 is formed with a tapered valve seat surface 62 with which the valve body 52 abuts and a through hole 63 penetrating from the valve seat surface 62 into the valve seat member 6. Has been.

次に、本実施形態に係る常閉型電磁弁１の作用について図１および図３を参照して説明する。参照する図面において、図３は、常閉型電磁弁を開状態から閉じ始めるときの液体の流れを示す斜視図（ａ）と、常閉型電磁弁を閉じ終わる直前のときの液体の流れを示す斜視図（ｂ）である。なお、図３においては、液体の流れを分かり易くするために、可動コア５１のストローク量などを実際よりも大きくして表現している。   Next, the operation of the normally closed solenoid valve 1 according to the present embodiment will be described with reference to FIGS. 1 and 3. In the drawings to be referred to, FIG. 3 is a perspective view (a) showing the flow of liquid when the normally closed solenoid valve starts to close from the open state, and shows the flow of liquid just before finishing the closing of the normally closed solenoid valve. It is a perspective view (b) shown. Note that in FIG. 3, the stroke amount of the movable core 51 and the like are expressed larger than actual in order to make the flow of the liquid easy to understand.

図１に示すように、通常時（コイルユニット４に電流が供給されていない状態）においては、リターンスプリングＲＳの付勢力によって弁体部材５が弁座部材６に押し付けられることで、基体Ｂの流路Ｒは閉塞された状態となっている。そして、コイルユニット４に電流を供給すると、このコイルユニット４で励磁される固定コア３によって、弁体部材５がリターンスプリングＲＳの付勢力に抗して固定コア３側に吸引されて、弁体５２が弁座部材６から離間する。これにより、基体Ｂの流路Ｒが開放された状態となる。   As shown in FIG. 1, the valve body member 5 is pressed against the valve seat member 6 by the urging force of the return spring RS in a normal state (a state in which no current is supplied to the coil unit 4). The flow path R is in a closed state. When a current is supplied to the coil unit 4, the valve body member 5 is attracted to the fixed core 3 side against the urging force of the return spring RS by the fixed core 3 excited by the coil unit 4. 52 is separated from the valve seat member 6. Thereby, the flow path R of the base body B is opened.

また、常閉型電磁弁１を開状態から閉状態に戻すときには、コイルユニット４への電流の供給を止めることで、弁体部材５がリターンスプリングＲＳの付勢力によって弁座部材６側へ勢いよく移動する。そして、このように移動する弁体部材５によって弁体部材５と弁座部材６との間の液体が押圧されると、その液体の一部が、第１流路Ｒ１、第２流路Ｒ２および第３流路Ｒ３を通って、弁体部材５の上側へ移動する。   Further, when returning the normally closed electromagnetic valve 1 from the open state to the closed state, the supply of the current to the coil unit 4 is stopped so that the valve body member 5 is urged toward the valve seat member 6 by the urging force of the return spring RS. Move well. And if the liquid between the valve body member 5 and the valve seat member 6 is pressed by the valve body member 5 which moves in this way, a part of the liquid will be 1st flow path R1 and 2nd flow path R2. And it moves to the upper side of the valve body member 5 through 3rd flow path R3.

このとき、図３（ａ）および（ｂ）に示すように、第２流路Ｒ２が弁体部材５の移動に伴って徐々に狭まって、その流路断面積が連通溝５１ｃの流路断面積よりも小さくなることにより、この狭まった部分があたかもオリフィスのように機能して、液体が第３流路Ｒ３へスムーズに逃げられなくなる。そのため、液体が弁体部材５と弁座部材６との間で一時的に滞留してダンパとして機能して、弁体部材５の勢いが弱められることとなる。   At this time, as shown in FIGS. 3A and 3B, the second flow path R2 gradually narrows as the valve body member 5 moves, and the cross-sectional area of the flow path is cut off from the communication groove 51c. By making it smaller than the area, the narrowed portion functions as if it were an orifice, and the liquid cannot smoothly escape to the third flow path R3. Therefore, the liquid temporarily stays between the valve body member 5 and the valve seat member 6, functions as a damper, and the momentum of the valve body member 5 is weakened.

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。
リターンスプリングＲＳによって勢いよく移動する弁体部材５の勢いが、徐々に狭まる第２流路Ｒ２によるダンパ効果によって、弱められるので、弁体部材５と弁座部材６の急激な衝突が抑制されて、異音の発生を抑制することができる。 According to the above, the following effects can be obtained in the present embodiment.
Since the momentum of the valve body member 5 that moves vigorously by the return spring RS is weakened by the damper effect by the second flow path R2 that gradually narrows, a sudden collision between the valve body member 5 and the valve seat member 6 is suppressed. The occurrence of abnormal noise can be suppressed.

［第２の実施形態］
次に、本発明の第２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。なお、本実施形態は、前記した第１の実施形態に係る常閉型電磁弁１の一部の構造を変更したものであるため、第１の実施形態と同様の構成要素については、同一符号を付し、その説明を省略することとする。参照する図面において、図４は、第２の実施形態に係る常閉型電磁弁を示す縦断面図である。 [Second Embodiment]
Next, a second embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In addition, since this embodiment changes a part of structure of the normally closed solenoid valve 1 which concerns on above-mentioned 1st Embodiment, about the component similar to 1st Embodiment, it is the same code | symbol The description will be omitted. In the drawings to be referred to, FIG. 4 is a longitudinal sectional view showing a normally closed solenoid valve according to a second embodiment.

図４に示すように、常閉型電磁弁１’は、第１の実施形態とは多少構造の異なる固定コア３’および可動コア５１’と、第１の実施形態に係る弁座部材６の代わりに設けられるフローシート７およびシート部材８とを主に備えて構成されている。   As shown in FIG. 4, the normally closed electromagnetic valve 1 ′ includes a fixed core 3 ′ and a movable core 51 ′ that are slightly different in structure from the first embodiment, and a valve seat member 6 according to the first embodiment. The flow sheet 7 and the sheet member 8 provided instead are mainly provided.

固定コア３’および可動コア５１’には、可動コア５１’のストローク量を前記実施形態よりも大きくするための逃げ部３ｆ，５１ｆがそれぞれ形成されている。なお、その他の構造は、前記実施形態と同様である。また、可動コア５１’の小径部５１ｂには、円筒状の吊下部材９が嵌合されている。そして、この吊下部材９には、その周壁の適所に複数の貫通孔９１が形成されるとともに、その下端部に内側へ向かって折り曲げられる爪部９２が形成されている。   The fixed core 3 ′ and the movable core 51 ′ are formed with relief portions 3 f and 51 f for making the stroke amount of the movable core 51 ′ larger than that in the embodiment. Other structures are the same as those in the above embodiment. A cylindrical suspension member 9 is fitted to the small diameter portion 51b of the movable core 51 '. The suspension member 9 has a plurality of through holes 91 formed at appropriate positions on the peripheral wall, and a claw portion 92 that is bent inward at the lower end portion.

フローシート７は、略有底円筒状の部材であり、その開口が下向きとなるように配設されている。そして、フローシート７の底壁７１には、弁体５２が当接されるテーパ状の第１弁座面７２と、この第１弁座面７２からフローシート７内に貫通する貫通孔７３とが形成されている。また、このフローシート７の下側の外周縁には、シート部材８と当接する球面状の当接面７４が形成され、上側の外周縁には、径方向外側へ突出する鍔部７５が形成されている。そして、この鍔部７５に吊下部材９の爪部９２が引っ掛かることで、フローシート７が可動コア５１’とともに上方に移動するようになっている。   The flow sheet 7 is a substantially bottomed cylindrical member, and is arranged so that its opening faces downward. The bottom wall 71 of the flow sheet 7 has a tapered first valve seat surface 72 with which the valve body 52 abuts, and a through hole 73 that penetrates from the first valve seat surface 72 into the flow sheet 7. Is formed. In addition, a spherical contact surface 74 that contacts the sheet member 8 is formed on the lower outer periphery of the flow sheet 7, and a flange 75 protruding radially outward is formed on the upper outer periphery. Has been. Then, when the claw portion 92 of the suspension member 9 is hooked on the flange portion 75, the flow sheet 7 moves upward together with the movable core 51 '.

シート部材８は、円筒状の部材であり、ボディ部２２の下部に圧入により固定されている。そして、このシート部材８の上側の開口縁には、フローシート７の当接面７４と当接するテーパ状の第２弁座面８１が形成されている。   The sheet member 8 is a cylindrical member, and is fixed to the lower portion of the body portion 22 by press-fitting. A tapered second valve seat surface 81 that contacts the contact surface 74 of the flow sheet 7 is formed on the upper opening edge of the seat member 8.

次に、第２の実施形態に係る常閉型電磁弁１’の作用について説明する。
図４に示すように、通常時においては、リターンスプリングＲＳの付勢力によって弁体部材５’がフローシート７に押し付けられるとともに、フローシート７がシート部材８に押し付けられることで、基体Ｂの流路Ｒは閉塞された状態となっている。そして、コイルユニット４に所定の大きさの電流を供給すると、このコイルユニット４で励磁される固定コア３’側に弁体部材５’が所定量だけ移動して、弁体５２がフローシート７から離間する。これにより、基体Ｂの流路Ｒが僅かに開放された状態となる。 Next, the operation of the normally closed solenoid valve 1 ′ according to the second embodiment will be described.
As shown in FIG. 4, in normal times, the valve body member 5 ′ is pressed against the flow sheet 7 by the urging force of the return spring RS, and the flow sheet 7 is pressed against the sheet member 8. The path R is in a blocked state. When a current of a predetermined magnitude is supplied to the coil unit 4, the valve body member 5 ′ moves toward the fixed core 3 ′ excited by the coil unit 4 by a predetermined amount, and the valve body 52 is moved to the flow sheet 7. Separate from. As a result, the flow path R of the base B is slightly opened.

また、前記した所定の大きさよりも大きな電流をコイルユニット４に供給すると、前記した移動量よりも大きく弁体部材５’が移動することで、吊下部材９の爪部９２がフローシート７の鍔部７５に引っ掛かり、フローシート７が弁体部材５’とともに移動する。これにより、フローシート７がシート部材８から離間して、基体Ｂの流路Ｒが大きく開放された状態となる。   Further, when a current larger than the predetermined size is supplied to the coil unit 4, the valve body member 5 ′ moves more than the amount of movement described above, so that the claw portion 92 of the suspension member 9 moves to the flow sheet 7. The flow sheet 7 is caught by the flange 75 and moves together with the valve body member 5 ′. As a result, the flow sheet 7 is separated from the sheet member 8 and the flow path R of the base B is largely opened.

そして、常閉型電磁弁１’を開状態から閉状態に戻すときには、コイルユニット４への電流の供給を止めることで、弁体部材５’およびフローシート７がリターンスプリングＲＳの付勢力によってシート部材８側へ勢いよく移動する。このとき、可動コア５１’とボディ部２２とによって第１の実施形態と同様の徐々に狭まる第２流路Ｒ２が形成されていることから、弁体部材５’およびフローシート７の勢いがダンパ効果により弱められることとなる。これにより、フローシート７がシート部材８にゆっくり着座するとともに、弁体部材５’がフローシート７にゆっくり着座することとなる。   When the normally closed electromagnetic valve 1 ′ is returned from the open state to the closed state, the supply of current to the coil unit 4 is stopped, so that the valve body member 5 ′ and the flow sheet 7 are seated by the urging force of the return spring RS. It moves vigorously toward the member 8 side. At this time, since the second flow path R2 gradually narrowing similar to the first embodiment is formed by the movable core 51 ′ and the body portion 22, the momentum of the valve body member 5 ′ and the flow sheet 7 is reduced by the damper. It will be weakened by the effect. As a result, the flow sheet 7 is slowly seated on the sheet member 8 and the valve body member 5 ′ is slowly seated on the flow sheet 7.

以上によれば、第２の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。
弁体部材５’およびフローシート７の勢いが徐々に狭まる第２流路Ｒ２によるダンパ効果によって弱められるので、フローシート７とシート部材８との急激な衝突や、弁体部材５’とフローシート７との急激な衝突が抑制されて、異音の発生を抑制することができる。 According to the above, the following effects can be obtained in the second embodiment.
Since the momentum of the valve body member 5 ′ and the flow sheet 7 is weakened by the damper effect by the second flow path R2, the sudden collision between the flow sheet 7 and the sheet member 8, the valve body member 5 ′ and the flow sheet 7 is suppressed, and the generation of abnormal noise can be suppressed.

なお、本発明は前記各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。
前記各実施形態では、電磁弁として常閉型電磁弁１，１’を採用したが、本発明はこれに限定されず、例えば常開型電磁弁を採用してもよい。ただし、前記各実施形態のように、リターンスプリングによって弁体部材が弁座部材側へ勢いよく移動する常閉型電磁弁の方が、大きな異音が発生する可能性が高いので、本発明の効果がより有効に発揮される。 The present invention is not limited to the above embodiments, and can be used in various forms as exemplified below.
In each of the above embodiments, the normally closed solenoid valves 1 and 1 ′ are employed as the solenoid valves. However, the present invention is not limited to this, and for example, a normally open solenoid valve may be employed. However, as in the above-described embodiments, the normally closed electromagnetic valve in which the valve body member is moved more vigorously toward the valve seat member by the return spring is more likely to generate a large noise. The effect is exhibited more effectively.

前記各実施形態では、可動コア５１（５１’）を段付き形状に形成し、その大径部５１ａと、この大径部５１ａに対向するボディ部２２の上端部２２ｃとで、徐々に狭まる第２流路Ｒ２を形成したが、本発明はこれに限定されるものではない。例えば、図５（ａ）に示すように、下部が円錐台状に形成された可動コア５１”のテーパ面５１ｇと、このテーパ面５１ｇに沿うようにボディ部２２’の上端部２２ｃ’に形成されたテーパ面２２ｈとで、徐々に狭まる第２流路Ｒ２’を形成してもよい。   In each of the above-described embodiments, the movable core 51 (51 ′) is formed in a stepped shape, and is gradually narrowed by the large diameter part 51a and the upper end part 22c of the body part 22 facing the large diameter part 51a. Although the two flow paths R2 are formed, the present invention is not limited to this. For example, as shown in FIG. 5A, the lower part is formed on a tapered surface 51g of a movable core 51 "having a truncated cone shape and an upper end part 22c 'of the body part 22' along the tapered surface 51g. A second flow path R2 ′ that gradually narrows may be formed with the tapered surface 22h.

また、図５（ｂ）に示すように、連通溝のない可動コア５３と、連通溝２４ｃを有したボディ部２４とで、徐々に狭まる第２流路Ｒ２”を形成してもよい。具体的に、この形態に係る可動コア５３は、第１の実施形態に係る可動コア５１とは連通溝５１ｃを設けない点のみで異なるだけで、その他の形状は同様に形成される。また、ボディ部２４は、第１の実施形態に係るガイド筒２１の機能を兼ねるべく、固定コア３側まで延びて形成され、可動コア５３を摺動自在に支持している。さらに、このボディ部２４の可動コア５３との摺動面の適所には、可動コア５３の進行方向における前後空間を繋ぐ連通溝２４ｃが上下方向に沿って形成される。そして、この連通溝２４ｃの下端側の角部２４ｈは、可動コア５３が最下点に位置したときの可動コア５３の大径部５３ａの角部５３ｈよりも下側に位置するように形成される。これにより、連通溝２４ｃの下端側の角部２４ｈと、可動コア５３の大径部５３ａの角部５３ｈとで、徐々に狭まる第２流路Ｒ２”が形成されることとなる。なお、この構造によれば、第１実施形態のような大径部５１ａに対向する流路形成部（上端部２２ｃ）を設けなくても、徐々に狭まる第２流路Ｒ２”を構成することができる。   Further, as shown in FIG. 5B, a second flow path R2 ″ that gradually narrows may be formed by the movable core 53 without the communication groove and the body portion 24 having the communication groove 24c. Therefore, the movable core 53 according to this embodiment is different from the movable core 51 according to the first embodiment only in that the communication groove 51c is not provided, and other shapes are formed in the same manner. The portion 24 is formed to extend to the fixed core 3 side so as to function as the guide tube 21 according to the first embodiment, and slidably supports the movable core 53. Further, the body portion 24 A communication groove 24c that connects the front and rear spaces in the traveling direction of the movable core 53 is formed along the vertical direction at an appropriate position on the sliding surface with the movable core 53. Then, a corner 24h on the lower end side of the communication groove 24c. Is when the movable core 53 is located at the lowest point. It is formed to be positioned below the corner 53h of the large-diameter portion 53a of the moving core 53. Thereby, the corner 24h on the lower end side of the communication groove 24c and the corner of the large-diameter portion 53a of the movable core 53 are formed. The second flow path R2 ″ that gradually narrows is formed by the portion 53h. In addition, according to this structure, the second flow path R2 ″ that gradually narrows can be formed without providing the flow path forming portion (upper end portion 22c) facing the large-diameter portion 51a as in the first embodiment. Can do.

前記各実施形態では、連通部を連通溝５１ｃとしたが、本発明はこれに限定されず、例えば貫通孔等であってもよい。
前記各実施形態では、弁体部材５を可動コア５１と弁体５２の２部品で構成したが、本発明はこれに限定されず、例えば可動コアと弁体とを一体に成形して１部品で弁体部材を構成してもよい。 In each said embodiment, although the communicating part was used as the communicating groove 51c, this invention is not limited to this, For example, a through-hole etc. may be sufficient.
In each said embodiment, although the valve body member 5 was comprised by 2 components, the movable core 51 and the valve body 52, this invention is not limited to this, For example, a movable core and a valve body are shape | molded integrally, and 1 component is formed. You may comprise a valve body member.

第１の実施形態に係る常閉型電磁弁を示す縦断面図である。It is a longitudinal cross-sectional view which shows the normally closed type solenoid valve which concerns on 1st Embodiment. 可動コアの構造を示す横断面図である。It is a cross-sectional view which shows the structure of a movable core. 常閉型電磁弁を開状態から閉じ始めるときの液体の流れを示す斜視図（ａ）と、常閉型電磁弁を閉じ終わる直前のときの液体の流れを示す斜視図（ｂ）である。They are a perspective view (a) which shows the flow of a liquid when it begins to close a normally closed solenoid valve from an open state, and a perspective view (b) which shows the flow of a liquid just before finishing a normally closed solenoid valve. 第２の実施形態に係る常閉型電磁弁を示す縦断面図である。It is a longitudinal cross-sectional view which shows the normally closed type solenoid valve which concerns on 2nd Embodiment. 徐々に狭まる流路の変形例を示す図であり、可動コアのテーパ面とボディ部のテーパ面とで流路を形成した形態を示す断面図（ａ）と、可動コアの大径部の角部とボディ部の上端開口の角部とで流路を形成した形態を示す断面図（ｂ）である。It is a figure which shows the modification of the flow path which becomes narrow gradually, and is sectional drawing (a) which shows the form which formed the flow path with the taper surface of a movable core, and the taper surface of a body part, and the angle | corner of the large diameter part of a movable core It is sectional drawing (b) which shows the form which formed the flow path with the corner | angular part of the upper end opening of a part and a body part.

符号の説明Explanation of symbols

１ 常閉型電磁弁
３ 固定コア
４ コイルユニット
５ 弁体部材
６ 弁座部材
２２ ボディ部
２２ｃ 上端部
４２ コイル
５１ 可動コア
５１ａ 大径部
５１ｂ 小径部
５１ｃ 連通溝
５２ 弁体
Ｒ２ 第２流路
ＲＳ リターンスプリング DESCRIPTION OF SYMBOLS 1 Normally closed solenoid valve 3 Fixed core 4 Coil unit 5 Valve body member 6 Valve seat member 22 Body part 22c Upper end part 42 Coil 51 Movable core 51a Large diameter part 51b Small diameter part 51c Communication groove 52 Valve body R2 2nd flow path RS Return spring

Claims (3)

弁座部材と、
前記弁座部材に当接自在に進退する弁体部材と、
前記弁体部材に摺接して弁体部材の進退動作をガイドするハウジングと、
前記弁体部材の前記弁座部材側の前方空間と前記弁体部材の前方空間とは反対側の後方空間とを連通する連通部と、を備えた電磁弁であって、
前記弁体部材が前記弁座部材側に移動する際に前記弁体部材と前記弁座部材との間から押し出された流体が通る流路が、前記弁体部材の移動に伴って徐々に狭まって前記連通部の流路断面積よりも小さな流路断面積となるような絞り部分が、前記弁体部材と前記ハウジングの間に形成されることを特徴とする電磁弁。 A valve seat member;
A valve body member that advances and retreats in a freely contacting manner with the valve seat member;
A housing that slides in contact with the valve body member and guides the forward and backward movement of the valve body member;
A communicating portion that communicates a front space of the valve body member on the valve seat member side and a rear space on the opposite side of the front space of the valve body member,
When the valve body member moves toward the valve seat member, the flow path through which the fluid pushed out from between the valve body member and the valve seat member gradually narrows as the valve body member moves. The throttle valve is formed between the valve body member and the housing so as to have a flow passage cross-sectional area smaller than the flow passage cross-sectional area of the communication portion. 前記弁体部材は、前記弁座部材側の部分が小径となる段付き形状に形成されるとともに、その外周面に前記連通部としての溝が形成され、
前記弁体部材の小径部分の周囲には、前記弁体部材の進行方向において前記弁体部材の大径部分に対向する流路形成部が設けられ、
前記流路が、前記弁体部材の大径部分と前記流路形成部によって構成されることを特徴とする請求項１に記載の電磁弁。 The valve body member is formed in a stepped shape with a small diameter on the valve seat member side, and a groove as the communication portion is formed on the outer peripheral surface thereof.
Around the small diameter portion of the valve body member, a flow path forming portion is provided that faces the large diameter portion of the valve body member in the traveling direction of the valve body member,
The electromagnetic valve according to claim 1, wherein the flow path is configured by a large diameter portion of the valve body member and the flow path forming portion. 前記弁体部材を前記弁座部材側へ付勢する弾性部材と、
前記弁体部材を前記弾性部材の付勢力に抗して前記弁座部材から離間させる固定コアおよびコイルとを備えた特徴とする請求項１または請求項２に記載の電磁弁。 An elastic member for urging the valve body member toward the valve seat member;
The electromagnetic valve according to claim 1, further comprising a fixed core and a coil that separate the valve body member from the valve seat member against an urging force of the elastic member.
JP2006354652A 2006-12-28 2006-12-28 solenoid valve Active JP4673831B2 (en)

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JP5233597B2 (en) * 2008-11-04 2013-07-10 トヨタ自動車株式会社 Brake control device
JP5120419B2 (en) * 2010-06-10 2013-01-16 株式会社アドヴィックス Normally closed solenoid valve
CN105026813B (en) * 2013-03-11 2017-09-22 丰田自动车株式会社 Magnetic valve

Citations (6)

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Publication number Priority date Publication date Assignee Title
JP2000046227A (en) * 1998-07-31 2000-02-18 Aisin Seiki Co Ltd Solenoid valve device
JP2002147639A (en) * 2000-11-14 2002-05-22 Aisin Seiki Co Ltd Solenoid valve
JP2002340219A (en) * 2001-05-16 2002-11-27 Aisin Seiki Co Ltd Solenoid valve
JP2003294161A (en) * 2002-03-29 2003-10-15 Nissin Kogyo Co Ltd Normally-closed type solenoid valve
JP2004183669A (en) * 2002-11-29 2004-07-02 Advics:Kk Normally closed opening/closing solenoid valve
JP2005024077A (en) * 2003-07-03 2005-01-27 Advics:Kk Solenoid valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000046227A (en) * 1998-07-31 2000-02-18 Aisin Seiki Co Ltd Solenoid valve device
JP2002147639A (en) * 2000-11-14 2002-05-22 Aisin Seiki Co Ltd Solenoid valve
JP2002340219A (en) * 2001-05-16 2002-11-27 Aisin Seiki Co Ltd Solenoid valve
JP2003294161A (en) * 2002-03-29 2003-10-15 Nissin Kogyo Co Ltd Normally-closed type solenoid valve
JP2004183669A (en) * 2002-11-29 2004-07-02 Advics:Kk Normally closed opening/closing solenoid valve
JP2005024077A (en) * 2003-07-03 2005-01-27 Advics:Kk Solenoid valve

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