JPH0672669B2 - solenoid valve - Google Patents

solenoid valve

Info

Publication number
JPH0672669B2
JPH0672669B2 JP63191378A JP19137888A JPH0672669B2 JP H0672669 B2 JPH0672669 B2 JP H0672669B2 JP 63191378 A JP63191378 A JP 63191378A JP 19137888 A JP19137888 A JP 19137888A JP H0672669 B2 JPH0672669 B2 JP H0672669B2
Authority
JP
Japan
Prior art keywords
plunger
coil
solenoid valve
case
bobbin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP63191378A
Other languages
Japanese (ja)
Other versions
JPH0242287A (en
Inventor
勲 上林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP63191378A priority Critical patent/JPH0672669B2/en
Priority to KR1019890007847A priority patent/KR930006510B1/en
Priority to US07/387,043 priority patent/US4936543A/en
Publication of JPH0242287A publication Critical patent/JPH0242287A/en
Priority to US07/481,772 priority patent/US4961561A/en
Publication of JPH0672669B2 publication Critical patent/JPH0672669B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は電磁弁に関するもので、特にプランジャの応
答性を向上することに係るものである。
The present invention relates to a solenoid valve, and more particularly to improving the response of a plunger.

〔従来の技術〕[Conventional technology]

第3図は従来のこの種の電磁弁を示す断面図である。図
において、(1)はケース、(2)はプレート、(3)
はプランジャ、(4)は固定鉄心、(5)はバルブシー
ト、(6)はスプリング、(7)はボビン、(8)はソ
レノイドコイル、(9)はそのリード端子、(10)はO
リング、(11)は入力孔、(12)は排出孔である。ケー
ス(1)は磁性材料で出来ていて継鉄の役目をなし、プ
レート(2)も磁性材料で出来ており、またプランジャ
(3)は可動鉄心により形成されている。かくして、ケ
ース(1)、プレート(2)、プランジャ(3)および
固定鉄心(4)は磁気回路を形成する。
FIG. 3 is a sectional view showing a conventional solenoid valve of this type. In the figure, (1) is a case, (2) is a plate, and (3)
Is a plunger, (4) is a fixed iron core, (5) is a valve seat, (6) is a spring, (7) is a bobbin, (8) is a solenoid coil, (9) is its lead terminal, and (10) is O.
A ring, (11) is an input hole, and (12) is a discharge hole. The case (1) is made of a magnetic material and functions as a yoke, the plate (2) is also made of a magnetic material, and the plunger (3) is formed of a movable iron core. Thus, the case (1), the plate (2), the plunger (3) and the fixed core (4) form a magnetic circuit.

コイル(8)に電流を通すと、コイル(8)は励磁され
てプランジャ(3)をスプリング(6)に抗して固定鉄
心(4)に吸引させる。コイル(8)を消勢すると、固
定鉄心(4)はプランジャ(3)を解放し、スプリング
(6)によりプランジャ(3)は前方へ押しやられる。
When an electric current is passed through the coil (8), the coil (8) is excited to cause the plunger (3) to attract the fixed iron core (4) against the spring (6). When the coil (8) is de-energized, the fixed core (4) releases the plunger (3) and the spring (6) pushes the plunger (3) forward.

このようにして、コイル(8)の付勢、消勢に応答して
プランジャ(3)の円錐形先端部により入力孔(11)が
開閉される。従って弁の開放時に、制御流体は入力孔
(11)より流入し、排出孔(12)から流出し、弁の閉塞
時に制御流体の流れを止める。
In this way, the input hole (11) is opened and closed by the conical tip of the plunger (3) in response to the energization and de-energization of the coil (8). Therefore, when the valve is opened, the control fluid flows in through the input hole (11) and flows out through the discharge hole (12), and stops the flow of the control fluid when the valve is closed.

〔発明が解決しようとする課題〕[Problems to be Solved by the Invention]

第4図に示す如く、従来の電磁弁では、入力孔(11)よ
り流入する流体(13)は矢印の如く進行し、流体中に混
在している磁性不純物(鉄粉、それもフィルターを通過
した微小なもの)が、コイル(8)の励磁毎に、プラン
ジャ(3)の突出した円錐形の表面に吸着され蓄積され
て行くと同時に、この蓄積されたものが流体(13)の流
れに押されてプレート(2)とプランジャ(3)との間
に侵入して行く。かくしてプランジャ(3)の足まわり
に磁石不純物の堆積物(14)が形成される。かかる堆積
物(14)は電磁弁の機能特性を変化させる。特にプラン
ジャ(3)のストローク長が約0.5mmであるというよう
な微妙な電磁弁において堆積物(14)が固定鉄心(4)
とプランジャ(3)との間に形成されると、プランジャ
(3)のストローク長が減少されて排出孔(12)側の油
圧制御に影響を与えたり、また、プランジャ(3)とプ
レート(2)との間の堆積物(14)はプランジャ(3)
の動きを鈍くさせたりするという問題があった。
As shown in FIG. 4, in the conventional solenoid valve, the fluid (13) flowing in from the input hole (11) proceeds as shown by the arrow, and the magnetic impurities (iron powder, which also pass through the filter) mixed in the fluid. Each time the coil (8) is excited, it is adsorbed and accumulated on the projecting conical surface of the plunger (3), and at the same time, this accumulated thing becomes the flow of the fluid (13). It is pushed into the space between the plate (2) and the plunger (3). Thus, a deposit (14) of magnetic impurities is formed around the foot of the plunger (3). Such deposits (14) change the functional characteristics of the solenoid valve. Especially in the delicate solenoid valve where the stroke length of the plunger (3) is about 0.5 mm, the deposit (14) is fixed to the fixed iron core (4).
If it is formed between the plunger (3) and the plunger (3), the stroke length of the plunger (3) is reduced to affect the hydraulic control on the discharge hole (12) side, or the plunger (3) and the plate (2) are affected. ) Is the plunger (3)
There was a problem of slowing down the movement of.

本発明はこのような問題点を解決するためになされたも
ので、長期間使用しても磁性不純物の堆積物が形成され
にくいようにした電磁弁を得ることを目的とする。
The present invention has been made to solve such a problem, and an object thereof is to obtain a solenoid valve in which a deposit of magnetic impurities is hard to be formed even when used for a long period of time.

〔課題を解決するための手段〕[Means for Solving the Problems]

この発明にかかる電磁弁は入力孔(11)を開閉するプラ
ンジャの先端の円錐形部分とそれに続く円筒形部分のと
の境界域に隣接して、円錐形の頂部からすそ野へ向かう
流れを反転させるための環状隆起部を設けたものであ
る。
The solenoid valve according to the present invention is adjacent to the boundary region between the conical portion at the tip of the plunger that opens and closes the input hole (11) and the subsequent cylindrical portion, and reverses the flow from the top of the conical portion to the skirt. It is provided with an annular raised portion for.

〔作用〕[Action]

この発明においては、プランジャの先端の円錐形部分の
ふもとに流れを反転させるための環状隆起部が設けられ
ているので、円錐形の表面に吸着された磁性不純物は環
状隆起部で反転される流体により付着表面から引き離さ
れ、プランジャの円筒形部分へと直に押し込まれていく
ことはなくなる。
In the present invention, since the annular ridge portion for inverting the flow is provided at the foot of the conical portion at the tip of the plunger, the magnetic impurities adsorbed on the conical surface are the fluids which are inverted by the annular ridge portion. Will not be pulled away from the attachment surface and will not be pushed directly into the cylindrical portion of the plunger.

〔実施例〕〔Example〕

第1図は本発明による一実施例の電磁弁を示す。第2図
は第1図の要部を拡大して示す図である。これら図にお
いて、(1)〜(13)は従来例と同一の部材または相当
部を示す。(30)は可動鉄心であるプランジャ(3)の
円錐形先端のふもとに設けられた環状の隆起部である。
FIG. 1 shows a solenoid valve according to an embodiment of the present invention. FIG. 2 is an enlarged view of a main part of FIG. In these figures, (1) to (13) show the same members or corresponding parts as in the conventional example. (30) is an annular ridge provided at the base of the conical tip of the plunger (3) which is a movable iron core.

本発明の電磁弁は、コイル(8)の付勢、消勢により入
力孔(11)から排出孔(12)への流体の流通、閉塞がな
されることは、従来のものと同じである。しかしなが
ら、第2図に示す如く入力孔(11)から流体(13)が流
れ込んでも環状隆起部(30)があるので、流体は反転さ
れる。かくして円錐形表面に吸着された不純物(15)が
ふもと部へ運ばれても、ふもと部での流体の反転により
付着表面から引き離され、従来の如く不純物が案内部の
すき間に直に押し込まれていくことはない。
The solenoid valve of the present invention is the same as the conventional one in that the fluid is circulated and blocked from the input hole (11) to the discharge hole (12) by energizing and deenergizing the coil (8). However, even if the fluid (13) flows from the input hole (11) as shown in FIG. 2, the fluid is reversed because of the annular ridge (30). Thus, even if the impurities (15) adsorbed on the conical surface are carried to the foot part, they are separated from the adhering surface by the reversal of the fluid at the foot part, and the impurities are pushed directly into the gap of the guide part as in the conventional case. There is no going.

〔発明の効果〕〔The invention's effect〕

本発明は以上説明したように、プランジャの先端の円錐
形部分のふもとに流れ反転用の環状隆起部を設けたの
で、プランジャの円錐形先端の表面に付着した磁性不純
物はふもと部において再び付着面から引き離されて流体
中に戻され、直にプランジャの足まわりに集積していく
ことはない。従ってこの電磁弁を永年使用しても電磁コ
イルに対するプランジャの応答性が変化せず、安定した
電磁弁の機能特性が得られるという効果がある。
As described above, according to the present invention, since the annular ridge for flow reversal is provided at the foot of the conical portion of the plunger tip, the magnetic impurities adhering to the surface of the conical tip of the plunger are reattached at the foot surface. It is pulled away from and returned to the fluid and does not accumulate directly around the foot of the plunger. Therefore, even if this electromagnetic valve is used for many years, the response of the plunger to the electromagnetic coil does not change, and stable magnetic valve functional characteristics can be obtained.

【図面の簡単な説明】[Brief description of drawings]

第1図は本発明の電磁弁の一実施例を示す断面図、第2
図は第1図の要部を拡大して示す図、第3図は従来の電
磁弁を示す断面図、第4図は第3図の要部を拡大して示
す図である。 図において、(1)はケース、(2)はプレート、
(3)はプランジャ、(4)は固定鉄心、(5)はバル
ブシート、(6)はスプリング、(7)はボビン、
(8)はソレノイドコイル、(11)は入力孔、(12)は
排出孔、(13)は流体、(14)は堆積物、(15)は磁性
不純物、(30)は環状隆起部である。 なお、各図中同一符号は同一または相当部分を示す。
FIG. 1 is a sectional view showing an embodiment of the solenoid valve of the present invention, and FIG.
1 is an enlarged view of the essential parts of FIG. 1, FIG. 3 is a sectional view showing a conventional solenoid valve, and FIG. 4 is an enlarged view of the essential parts of FIG. In the figure, (1) is a case, (2) is a plate,
(3) is a plunger, (4) is a fixed iron core, (5) is a valve seat, (6) is a spring, (7) is a bobbin,
(8) is a solenoid coil, (11) is an input hole, (12) is a discharge hole, (13) is a fluid, (14) is a deposit, (15) is a magnetic impurity, and (30) is an annular ridge. . In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】磁性体からなるケース、このケースに収容
されたソレノイドコイル、このコイルを巻きつけたボビ
ン、前記ケースの一端に取り付けられかつ前記ボビンの
一端からその中心部に突入した部分を有する固定鉄心、
前記ボビンの他端に設けられた磁性体のプレート、前記
プレートと前記固定鉄心との間の磁路中であって前記ボ
ビンの他端で軸方向に可動に設けられ前記コイルへの通
電によって前記固定鉄心の方へ吸引され先端に円錐形部
分が設けられた磁性体のプランジャ、および前記プラン
ジャを前記固定鉄心とは逆の方向に押圧するスプリング
を具備し、前記プレートは前記ケースを二つの室に仕切
り、その一方の室に前記プランジャを駆動する前記コイ
ル、スプリング等を配置し、他方の室にプランジャの先
端により開閉される入力孔を備えた弁室を形成した電磁
弁において、 前記入力孔を開閉するプランジャの前記先端の円錐形部
分とこれに続く円筒形部分との境界域に隣接して、円錐
形の頂部からすそ野へ向かう流れを反転させるための環
状隆起部を設けたことを特徴とする電磁弁。
1. A case made of a magnetic material, a solenoid coil housed in the case, a bobbin wound with the coil, and a portion attached to one end of the case and projecting from one end of the bobbin into a central portion thereof. Fixed iron core,
A plate made of a magnetic material provided at the other end of the bobbin, in the magnetic path between the plate and the fixed iron core, and is provided axially movably at the other end of the bobbin by energizing the coil. The plate is equipped with a magnetic plunger that is attracted toward the fixed core and has a conical portion at its tip, and a spring that presses the plunger in a direction opposite to that of the fixed core, and the plate holds the case in two chambers. In the solenoid valve, the coil, the spring, etc. for driving the plunger are arranged in one of the chambers, and the valve chamber having the input hole opened and closed by the tip of the plunger is formed in the other chamber. An annular ridge for reversing the flow from the top of the cone to the skirt is adjacent to the boundary area between the conical portion of the tip of the plunger that opens and closes and the subsequent cylindrical portion. A solenoid valve characterized by having a starting portion.
JP63191378A 1988-07-29 1988-07-29 solenoid valve Expired - Lifetime JPH0672669B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP63191378A JPH0672669B2 (en) 1988-07-29 1988-07-29 solenoid valve
KR1019890007847A KR930006510B1 (en) 1988-07-29 1989-06-08 Solenoid valve
US07/387,043 US4936543A (en) 1988-07-29 1989-07-31 Solenoid valve
US07/481,772 US4961561A (en) 1988-07-29 1990-02-16 Solenoid valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63191378A JPH0672669B2 (en) 1988-07-29 1988-07-29 solenoid valve

Publications (2)

Publication Number Publication Date
JPH0242287A JPH0242287A (en) 1990-02-13
JPH0672669B2 true JPH0672669B2 (en) 1994-09-14

Family

ID=16273598

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63191378A Expired - Lifetime JPH0672669B2 (en) 1988-07-29 1988-07-29 solenoid valve

Country Status (1)

Country Link
JP (1) JPH0672669B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2571477Y2 (en) * 1991-10-30 1998-05-18 株式会社アマダ Turret punch press

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58153777A (en) * 1982-03-10 1983-09-12 Ulvac Corp Formation of pattern on surface of metal by ion plating

Also Published As

Publication number Publication date
JPH0242287A (en) 1990-02-13

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