JP5903845B2 - solenoid valve - Google Patents

solenoid valve Download PDF

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JP5903845B2
JP5903845B2 JP2011254652A JP2011254652A JP5903845B2 JP 5903845 B2 JP5903845 B2 JP 5903845B2 JP 2011254652 A JP2011254652 A JP 2011254652A JP 2011254652 A JP2011254652 A JP 2011254652A JP 5903845 B2 JP5903845 B2 JP 5903845B2
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valve seat
valve
hole
seat member
press
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JP2013108573A (en
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康之 松尾
康之 松尾
圭太郎 杉浦
圭太郎 杉浦
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Aisin Corp
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Aisin Seiki Co Ltd
Aisin Corp
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Description

本発明は、例えば車両の動弁制御装置や自動変速装置等において使用される電磁弁に関する。   The present invention relates to an electromagnetic valve used in, for example, a valve control device or an automatic transmission of a vehicle.

従来、車両の動弁制御装置や自動変速装置等において使用される電磁弁として、特許文献１および２に開示されたものが知られている。   2. Description of the Related Art Conventionally, electromagnetic valves disclosed in Patent Documents 1 and 2 are known as electromagnetic valves used in vehicle valve control devices, automatic transmissions, and the like.

特許文献１には、調圧部（流路制御部）とソレノイド部（電磁部）とを備え、ソレノイド部でプランジャを磁力で駆動することにより調圧部で弁を開閉し、調圧部が取付穴（装着穴）に挿入された状態で使用される電磁弁が開示されている。この特許文献１では、調圧部は、筒型コアの内周に弁座部材としてのベース部材を圧入した構造を有しており、さらにその調圧部には、ベース部材の圧入に伴う筒型コアの外形形状の変化を抑える圧入変形抑制構造が設けられている。具体的な圧入変形抑制構造として、円筒コア内部に空隙部を設けることが例示されている。   Patent Document 1 includes a pressure adjusting unit (flow path control unit) and a solenoid unit (electromagnetic unit), and the solenoid is driven by a magnetic force to open and close the valve by the pressure adjusting unit. An electromagnetic valve used in a state of being inserted into a mounting hole (mounting hole) is disclosed. In Patent Document 1, the pressure adjusting portion has a structure in which a base member as a valve seat member is press-fitted into the inner periphery of a cylindrical core, and the pressure adjusting portion further includes a cylinder accompanying press-fitting of the base member. A press-fit deformation suppressing structure that suppresses a change in the outer shape of the mold core is provided. As a specific press-fit deformation suppressing structure, it is exemplified that a gap is provided inside the cylindrical core.

そして、特許文献２には、弁機構（流路制御部）と該弁機構に接続するソレノイド機構（電磁部）とを備えた三方電磁弁が開示されている。弁機構は、ボール弁部材を収容するボール弁収容部材と、吸入口を形成する弁座部材としての蓋部材とを備えており、該蓋部材は、ボール弁収容部材に圧入されながらかしめられて固定されている。また、ソレノイド機構は、プランジャ部材を収容するプランジャ収容部材と、該プランジャ収容部材内に収容したプランジャ部材を封止する封止部材とを備えており、該封止部材は、プランジャ収容部材に圧入されながらかしめられて固定されている。   Patent Document 2 discloses a three-way electromagnetic valve including a valve mechanism (flow path control unit) and a solenoid mechanism (electromagnetic unit) connected to the valve mechanism. The valve mechanism includes a ball valve housing member that houses a ball valve member, and a lid member that serves as a valve seat member that forms a suction port. The lid member is crimped while being press-fitted into the ball valve housing member. It is fixed. The solenoid mechanism includes a plunger housing member that houses the plunger member and a sealing member that seals the plunger member housed in the plunger housing member, and the sealing member is press-fitted into the plunger housing member. While being squeezed, it is fixed.

特開２０００−１５４８８３号公報JP 2000-154883 A 特開２００５−２４０８５２号公報JP-A-2005-240852

ところで、特許文献１の電磁弁においては、ベース部材を円筒コアの内周に圧入した際に円筒コアが径方向外方へ膨らむのを防止するために、円筒コア内部に空隙部を設けた圧入変形抑制構造を採用しているため、空隙部を形成する煩雑な加工が必要となり、コスト上昇を招くこととなる。   By the way, in the electromagnetic valve of Patent Document 1, in order to prevent the cylindrical core from expanding radially outward when the base member is press-fitted into the inner periphery of the cylindrical core, a press-fitting provided with a gap inside the cylindrical core. Since the deformation suppressing structure is adopted, complicated processing for forming the gap is required, which causes an increase in cost.

一方、特許文献２の電磁弁においては、蓋部材を、ボール弁収容部材に圧入しながらかしめて固定するようにしていることから、蓋部材を圧入した際にボール弁収容部材が径方向外方へ膨らむため、ボール弁収容部材の外径にその膨らみを考慮した公差が必要になり、しかもその公差の設定は狭い範囲に強いられるため厳しくなる。
本発明は、上記事情に鑑みてなされたものであり、弁座部材が圧入される弁本体の円筒部の公差を緩和して、円筒部が嵌合される装着穴と円筒部との間のシール性の向上を図るとともに、低コスト化を可能にした電磁弁を提供することを解決すべき課題とするものである。 On the other hand, in the electromagnetic valve of Patent Document 2, the lid member is fixed by caulking into the ball valve housing member, so that the ball valve housing member is radially outward when the lid member is press-fitted. Therefore, the outer diameter of the ball valve housing member needs to have a tolerance in consideration of the swelling, and the setting of the tolerance is forced to a narrow range and becomes strict.
The present invention has been made in view of the above circumstances, and relaxes the tolerance of the cylindrical portion of the valve body into which the valve seat member is press-fitted, and between the mounting hole and the cylindrical portion into which the cylindrical portion is fitted. An object to be solved is to provide a solenoid valve that can improve the sealing performance and reduce the cost.

上記課題を解決する請求項１に係る発明の構成上の特徴は、装着穴に嵌合されるとともに前記装着穴の軸線方向に延在する円筒部が先端に設けられた弁本体と、前記円筒部に設けられた供給通路に連通する第１弁座と、前記円筒部に設けられたドレン通路に連通する第２弁座と、前記第１弁座および前記第２弁座に選択的に当接されるボール弁と、前記第１弁座と前記第２弁座との間に配置された弁室に連通し前記円筒部の外周部に形成された制御液環状溝と、前記制御液環状溝と前記供給通路の開口部との間に形成され、前記装着穴にシール可能に嵌合する第１シール部と、前記制御液環状溝と前記ドレン通路の開口部との間に形成され、前記装着穴にシール可能に嵌合する第２シール部と、前記弁本体に取り付けられ前記ボール弁を前記第１弁座または前記第２弁座に押圧させる電磁部と、前記第１弁座が形成された第１弁座部材と、前記第１弁座部材がその中に入れられる穴であって、前記軸線方向において前記制御液環状溝の範囲内で前記供給通路と前記弁室との間に形成され、前記第１弁座部材の外径より小径の第１穴と、を備えたことである。 The structural feature of the invention according to claim 1 for solving the above-mentioned problems is that the valve body is fitted in the mounting hole and extends in the axial direction of the mounting hole at the tip, and the cylinder A first valve seat that communicates with a supply passage provided in the portion, a second valve seat that communicates with a drain passage provided in the cylindrical portion, and the first valve seat and the second valve seat selectively. A contacted ball valve, a control fluid annular groove formed in an outer peripheral portion of the cylindrical portion, communicating with a valve chamber disposed between the first valve seat and the second valve seat, and the control fluid annular A first seal portion formed between the groove and the opening of the supply passage and fitted in the mounting hole so as to be sealable; and formed between the control liquid annular groove and the opening of the drain passage; A second seal portion fitted into the mounting hole so as to be sealable; and the ball valve attached to the valve body. An electromagnetic unit which is pressed against the first valve seat and the second valve seat, a first valve seat member which is the first valve locus formed, said first valve seat member is a hole to be placed therein, wherein And a first hole formed between the supply passage and the valve chamber within the range of the control liquid annular groove in the axial direction and having a diameter smaller than the outer diameter of the first valve seat member .

請求項２に係る発明の構成上の特徴は、請求項１において、前記第２弁座が形成された第２弁座部材と、前記第２弁座部材がその中に入れられる穴であって、前記軸線方向において前記制御液環状溝の範囲内で前記ドレン通路と前記弁室との間に形成され、前記第２弁座部材の外径より小径かつ前記第１穴より小径の第２穴と、を備えたことである。 Structural feature of the invention according to claim 2, in claim 1, and a second valve seat member in which the second valve seat is formed, the second valve seat member is a hole to be placed therein And a second hole formed between the drain passage and the valve chamber within the range of the control liquid annular groove in the axial direction and having a diameter smaller than the outer diameter of the second valve seat member and smaller than the first hole. It is to have .

請求項３に係る発明の構成上の特徴は、請求項２において、前記第１穴と前記弁室との間には、前記第１弁座部材の先端に形成されたテーパ部の先端面が当接する第１段差が形成され、前記第２穴と前記ドレン通路との間には、前記第２弁座部材の先端に形成されたテーパ部の先端面が当接する第２段差が形成されていることである。 The structural feature of the invention according to claim 3 is that in claim 2, the tip surface of the tapered portion formed at the tip of the first valve seat member is between the first hole and the valve chamber. A first step is formed, and a second step is formed between the second hole and the drain passage. It is that you are.

請求項４に係る発明の構成上の特徴は、請求項１〜３のいずれか一項において、前記電磁部の非通電時には、前記電磁部のプランジャがばね部材のばね力で付勢されることにより前記ボール弁が前記第１弁座に押圧されるノーマルクローズタイプのものであることである。   The structural feature of the invention according to claim 4 is that in any one of claims 1 to 3, when the electromagnetic part is not energized, the plunger of the electromagnetic part is biased by the spring force of the spring member. Thus, the ball valve is of a normally closed type that is pressed against the first valve seat.

請求項１に係る発明によれば、第１弁座部材がその中に入れられる第１穴は、装着穴の軸線方向に延在する弁本体の円筒部の外周部に設けられた制御液環状溝の範囲内で供給通路と弁室との間に形成されていることから、第１穴に第１弁座部材が圧入されたときに発生する円筒部の径方向外方への膨らみが制御液環状溝に吸収される。そのため、円筒部の制御液環状溝以外の第１および第２シール部の外径が、第１弁座部材の圧入によって大きくなることが回避される。これにより、第１および第２シール部の外径並びに装着穴の内径の公差を、第１弁座部材の圧入による外径の拡大を考慮して厳しく設定する必要がなくなるので、装着穴と第１および第２シール部との間のシール性が向上するとともに、低コスト化が可能となる。 According to the first aspect of the present invention, the first hole into which the first valve seat member is inserted is a control liquid ring provided on the outer peripheral portion of the cylindrical portion of the valve body extending in the axial direction of the mounting hole. Since it is formed between the supply passage and the valve chamber within the range of the groove, the radially outward expansion of the cylindrical portion that occurs when the first valve seat member is press-fitted into the first hole is controlled. Absorbed in the liquid annular groove. Therefore, it is avoided that the outer diameters of the first and second seal portions other than the control liquid annular groove of the cylindrical portion become large due to the press-fitting of the first valve seat member. This eliminates the need to set the tolerances of the outer diameters of the first and second seal portions and the inner diameter of the mounting hole in consideration of the expansion of the outer diameter due to the press-fitting of the first valve seat member. While the sealing performance between the first and second seal portions is improved, the cost can be reduced.

請求項２に係る発明によれば、第２弁座部材がその中に入れられる第２穴は、装着穴の軸線方向に延在する弁本体の円筒部の外周部に設けられた制御液環状溝の範囲内でドレン通路と弁室との間に形成されていることから、第２穴に第２弁座部材が圧入されたときに発生する円筒部の径方向外方への膨らみが制御液環状溝に吸収される。そのため、円筒部の制御液環状溝以外の第１および第２シール部の外径が大きくなることが回避される。これにより、第１および第２シール部の外径並びに装着穴の内径の公差を緩和することができるので、シール性を向上して低コスト化が可能となる。また、第２弁座部材が弁本体と別体に形成されるため、第２弁座部材の製作が容易になる。 According to the invention which concerns on Claim 2, the 2nd hole in which a 2nd valve seat member is put in is the control-liquid ring provided in the outer peripheral part of the cylindrical part of the valve main body extended in the axial direction of a mounting hole Since it is formed between the drain passage and the valve chamber within the range of the groove, the radially outward bulge of the cylindrical portion generated when the second valve seat member is press-fitted into the second hole is controlled. Absorbed in the liquid annular groove. Therefore, it is avoided that the outer diameters of the first and second seal portions other than the control liquid annular groove of the cylindrical portion are increased. Thereby, since the tolerances of the outer diameters of the first and second seal portions and the inner diameter of the mounting hole can be relaxed, the sealing performance can be improved and the cost can be reduced. Further, since the second valve seat member is formed separately from the valve main body, the second valve seat member can be easily manufactured.

請求項３に係る発明によれば、第１穴と弁室との間には、第１弁座部材の先端に形成されたテーパ部の先端面が当接する第１段差が形成され、第２穴とドレン通路との間には、第２弁座部材の先端に形成されたテーパ部の先端面が当接する第２段差が形成されている。これにより、第１弁座部材のテーパ部と第１段差とにより第１空間部が形成され、第２弁座部材のテーパ部と第２段差とにより第２空間部が形成されるので、第１および第２弁座部材のそれぞれの圧入時に発生した異物を、第１および第２空間部に封じ込めることができる。そのため、異物が弁部に噛み込まれることを回避することができる。また、第１および第２弁座部材の先端にはそれぞれテーパ部が設けられているので、第１または第２穴へのそれらの圧入を容易に行うことができる。 According to the invention of claim 3, between the first bore and the valve chamber, a first step in which the distal end surface of the tapered portion formed at the tip of the first valve seat member abuts it is formed, the second Between the hole and the drain passage, a second step is formed in which the tip surface of the tapered portion formed at the tip of the second valve seat member abuts. Accordingly, the first space portion is formed by the tapered portion and the first step of the first valve seat member, and the second space portion is formed by the tapered portion and the second step of the second valve seat member. Foreign matter generated during press-fitting of the first and second valve seat members can be contained in the first and second space portions. Therefore, it can avoid that a foreign material is bitten by the valve part. Moreover, since the taper part is provided in the front-end | tip of the 1st and 2nd valve-seat member, respectively, those press injection to a 1st or 2nd hole can be performed easily.

請求項４に係る発明によれば、電磁弁は、電磁部の非通電時には、電磁部のプランジャがばね部材のばね力で付勢されることによりボール弁が第１弁座に押圧されるノーマルクローズタイプのものであるため、ボール弁のクローズ時において、第１および第２シール部に液圧が作用するが、本発明に係る電磁弁では第１および第２シール部と装着穴との間で十分なシール性を確保することができる。そのため、通常時（クローズ状態時）に、第１および第２シール部のシール機能を確実に果たして圧力液体の漏洩を防止することができる。   According to the fourth aspect of the present invention, the electromagnetic valve is a normal valve in which the ball valve is pressed against the first valve seat by the plunger of the electromagnetic part being biased by the spring force of the spring member when the electromagnetic part is not energized. Since it is a closed type, the hydraulic pressure acts on the first and second seal portions when the ball valve is closed, but in the electromagnetic valve according to the present invention, there is a gap between the first and second seal portions and the mounting hole. With this, sufficient sealing performance can be secured. Therefore, at the normal time (in the closed state), the sealing function of the first and second seal portions can be reliably performed to prevent the pressure liquid from leaking.

本発明の実施形態に係る電磁弁の全体構成を示す軸方向断面図である。It is an axial direction sectional view showing the whole electromagnetic valve composition concerning the embodiment of the present invention. 図１の要部を拡大して示す要部拡大断面図である。It is a principal part expanded sectional view which expands and shows the principal part of FIG.

以下、本発明に係る電磁弁の実施形態について図１および図２を参照しつつ説明する。図１は、本実施形態に係る電磁弁１の全体構成を示す軸方向断面図である。図２は、図１の要部（ボール弁近傍部）を拡大して示す要部拡大断面図である。本実施形態の電磁弁１は、例えば車両の自動変速機等に装着されて使用されるものであって、図１に示すように、流路制御部１０と、流路制御部１０と連結して一体に形成された電磁部２０とを備えている。   Hereinafter, an embodiment of a solenoid valve according to the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is an axial cross-sectional view showing the overall configuration of the electromagnetic valve 1 according to the present embodiment. FIG. 2 is an enlarged cross-sectional view of a main part showing an enlarged main part (ball valve vicinity) of FIG. The electromagnetic valve 1 of the present embodiment is used by being mounted on, for example, an automatic transmission of a vehicle, and is connected to a flow path control unit 10 and a flow path control unit 10 as shown in FIG. And an electromagnetic part 20 formed integrally.

流路制御部１０は、自動変速機３０に設けられた円柱状の装着穴３１に先端側（図１の左側、以後同じ）が嵌合されるとともに装着穴３１の軸線方向に延在する円筒部１１ａと、円筒部１１ａの後端（図１の右側端、以後同じ）から径方向外方に張り出すリング状のフランジ部１１ｂとを有する弁本体としてのベース１１を備えている。装着穴３１に同軸状に嵌合される円筒部１１ａの内周側には、先端側から順番に、先端側に開口部を有する制御液の供給通路１１ｃと、リング状の第１弁座部材１４が圧入される第１圧入穴１１ｄと、弁室１１ｅと、リング状の第２弁座部材１５が圧入される第２圧入穴１１ｆと、電磁部２０により作動するシャフト２６が嵌挿される円孔１１ｇと、電磁部２０のプランジャ２５の一部が嵌挿される嵌挿孔１１ｈとが設けられている。   The flow path control unit 10 includes a cylindrical mounting hole 31 provided in the automatic transmission 30, a front end side (left side in FIG. 1, the same applies hereinafter) is fitted and a cylinder extending in the axial direction of the mounting hole 31. A base 11 is provided as a valve body having a portion 11a and a ring-shaped flange portion 11b projecting radially outward from a rear end of the cylindrical portion 11a (the right end in FIG. 1 and the same hereinafter). On the inner peripheral side of the cylindrical portion 11a fitted coaxially to the mounting hole 31, a control liquid supply passage 11c having an opening on the distal end side in order from the distal end side, and a ring-shaped first valve seat member A circle into which a first press-fitting hole 11d into which 14 is press-fitted, a valve chamber 11e, a second press-fitting hole 11f into which the ring-shaped second valve seat member 15 is press-fitted, and a shaft 26 operated by the electromagnetic unit 20 are fitted. A hole 11g and an insertion hole 11h into which a part of the plunger 25 of the electromagnetic unit 20 is inserted are provided.

弁室１１ｅの直径は、第１圧入穴１１ｄの直径よりも小さくされている。これにより、第１圧入穴１１ｄと弁室１１ｅとの間には、第１段差１２が形成されている。この第１段差１２には、供給通路１１ｃ側から第１圧入穴１１ｄに圧入された第１弁座部材１４の圧入方向先端に形成されたテーパ部の先端面が当接している。これにより、図２に示すように、第１弁座部材１４のテーパ部と第１段差１２とにより第１空間部１２ａが形成されている。弁室１１ｅの外周側には、円筒部１１ａを放射方向に貫通し円筒部１１ａの外周面に開口する複数の制御通路１１ｉが設けられている。   The diameter of the valve chamber 11e is made smaller than the diameter of the first press-fitting hole 11d. Thereby, a first step 12 is formed between the first press-fitting hole 11d and the valve chamber 11e. The first step 12 is in contact with the tip end surface of the tapered portion formed at the tip end in the press-fitting direction of the first valve seat member 14 press-fitted into the first press-fitting hole 11d from the supply passage 11c side. Thereby, as shown in FIG. 2, the first space portion 12 a is formed by the tapered portion of the first valve seat member 14 and the first step 12. On the outer peripheral side of the valve chamber 11e, a plurality of control passages 11i that penetrate the cylindrical portion 11a in the radial direction and open to the outer peripheral surface of the cylindrical portion 11a are provided.

第２圧入穴１１ｆの直径は、第１圧入穴１１ｄおよび弁室１１ｅの直径よりも小さくされている。これにより、第２圧入穴１１ｆと円孔１１ｇとの間には、第２段差１３が形成されている。この第２段差１３には、供給通路１１ｃ側から第２圧入穴１１ｆに圧入される第２弁座部材１５の圧入方向先端に形成されたテーパ部の先端面が当接している。これにより、図２に示すように、第２弁座部材１５のテーパ部と第２段差１３とにより第２空間部１３ａが形成されている。円孔１１ｇの後端側には、円筒部１１ａを放射方向に貫通し円筒部１１ａの外周面に開口する複数のドレン通路１１ｊが設けられている。   The diameter of the second press-fitting hole 11f is smaller than the diameters of the first press-fitting hole 11d and the valve chamber 11e. Thereby, a second step 13 is formed between the second press-fitting hole 11f and the circular hole 11g. The second step 13 is in contact with the tip surface of the tapered portion formed at the tip of the second valve seat member 15 that is press-fitted into the second press-fitting hole 11f from the supply passage 11c side. Thereby, as shown in FIG. 2, a second space portion 13 a is formed by the tapered portion of the second valve seat member 15 and the second step 13. On the rear end side of the circular hole 11g, a plurality of drain passages 11j that pass through the cylindrical portion 11a in the radial direction and open to the outer peripheral surface of the cylindrical portion 11a are provided.

第１圧入穴１１ｄに圧入された第１弁座部材１４の後端側面の中央部には、先端側へ凹んだ第１弁座１４ａが形成されている。この第１弁座１４ａは、第１弁座部材１４の中央貫通孔を介して供給通路１１ｃに連通している。また、第２圧入穴１１ｆに圧入された第２弁座部材１５の先端側面の中央部には、後端側へ凹んだ第２弁座１５ａが形成されている。この第２弁座１５ａは、第２弁座部材１５の中央貫通孔を介して円孔１１ｇおよびドレン通路１１ｊに連通している。   A first valve seat 14a that is recessed toward the distal end is formed at the center of the rear end side surface of the first valve seat member 14 that is press-fitted into the first press-fitting hole 11d. The first valve seat 14 a communicates with the supply passage 11 c through the central through hole of the first valve seat member 14. Further, a second valve seat 15a that is recessed toward the rear end side is formed at the center of the front end side surface of the second valve seat member 15 that is press-fitted into the second press-fitting hole 11f. The second valve seat 15a communicates with the circular hole 11g and the drain passage 11j through the central through hole of the second valve seat member 15.

第１弁座１４ａと第２弁座１５ａとの間に形成された略円柱状の空間部よりなる弁室１１ｅには、ボール弁１６が配設されている。このボール弁１６は、弁室１１ｅの後端側に配設され電磁部２０により作動するシャフト２６によって、第１弁座１４ａと第２弁座１５ａとに選択的に着座（当接）するようになっている。ボール弁１６が第１弁座１４ａに着座したときには、供給通路１１ｃと制御通路１１ｉの連通が遮断され、供給通路１１ｃから制御通路１１ｉへの制御液の供給が不可能となる。一方、ボール弁１６が第２弁座１５ａに着座したときには、供給通路１１ｃが開放して制御通路１１ｉと連通し、供給通路１１ｃから制御通路１１ｉへの制御液の供給が可能となる。   A ball valve 16 is disposed in a valve chamber 11e formed of a substantially cylindrical space formed between the first valve seat 14a and the second valve seat 15a. The ball valve 16 is selectively seated (contacted) on the first valve seat 14a and the second valve seat 15a by a shaft 26 disposed on the rear end side of the valve chamber 11e and operated by the electromagnetic unit 20. It has become. When the ball valve 16 is seated on the first valve seat 14a, the communication between the supply passage 11c and the control passage 11i is blocked, and the supply of the control liquid from the supply passage 11c to the control passage 11i becomes impossible. On the other hand, when the ball valve 16 is seated on the second valve seat 15a, the supply passage 11c is opened to communicate with the control passage 11i, and the control liquid can be supplied from the supply passage 11c to the control passage 11i.

円筒部１１ａの外周面には、制御通路１１ｉを介して弁室１１ｅに連通する制御液環状溝１７が設けられている。この制御液環状溝１７は、制御通路１１ｉの開口を含む所定の軸線方向幅Ｗで周方向に１周するように形成されている。制御液環状溝１７の軸線方向先端側の端部は、第１弁座部材１４が圧入された第１圧入穴１１ｄよりも軸線方向先端側に位置し、制御液環状溝１７の軸線方向後端側の端部は、第２弁座部材１５が圧入された第２圧入穴１１ｆよりも軸線方向後端側に位置している。即ち、第１弁座部材１４が圧入された第１圧入穴１１ｄは、制御液環状溝１７の軸線方向幅Ｗの範囲内で供給通路１１ｃと弁室１１ｆとの間に形成されており、第２弁座部材１５が圧入された第２圧入穴１１ｆは、制御液環状溝１７の軸線方向幅Ｗの範囲内でドレン通路１１ｊと弁室１１ｅとの間に形成されている。   A control liquid annular groove 17 that communicates with the valve chamber 11e via a control passage 11i is provided on the outer peripheral surface of the cylindrical portion 11a. The control liquid annular groove 17 is formed so as to make one round in the circumferential direction with a predetermined axial width W including the opening of the control passage 11i. The end of the control liquid annular groove 17 on the front end side in the axial direction is located on the front end side in the axial direction from the first press-fitting hole 11 d into which the first valve seat member 14 is press-fitted, and the rear end in the axial direction of the control liquid annular groove 17. The end on the side is located on the rear end side in the axial direction from the second press-fitting hole 11f into which the second valve seat member 15 is press-fitted. That is, the first press-fitting hole 11 d into which the first valve seat member 14 is press-fitted is formed between the supply passage 11 c and the valve chamber 11 f within the range of the axial width W of the control liquid annular groove 17. The second press-fitting hole 11 f into which the two valve seat member 15 is press-fitted is formed between the drain passage 11 j and the valve chamber 11 e within the range of the axial width W of the control liquid annular groove 17.

円筒部１１ａ外周面の制御液環状溝１７と供給通路１１ｃの開口部との間には、自動変速機３０の装着穴３１にシール可能に嵌合する第１シール部１８が設けられている。また、円筒部１１ａ外周面の制御液環状溝１７とドレン通路１１ｊの開口部との間には、自動変速機３０の装着穴３１にシール可能に嵌合する第２シール部１９が設けられている。第１および第２シール部１８、１９と装着穴３１との間のクリアランスは、電磁弁１の装着穴３１への取付け性を考慮すると、０〜１００μｍの範囲に設定されているのが好ましく、より好ましくは２０〜５０μｍの範囲である。   Between the control liquid annular groove 17 on the outer peripheral surface of the cylindrical portion 11a and the opening of the supply passage 11c, a first seal portion 18 is provided that fits into the mounting hole 31 of the automatic transmission 30 so as to be able to be sealed. A second seal portion 19 is provided between the control liquid annular groove 17 on the outer peripheral surface of the cylindrical portion 11a and the opening of the drain passage 11j so as to be fitted in the mounting hole 31 of the automatic transmission 30 so as to be able to be sealed. Yes. The clearance between the first and second seal portions 18 and 19 and the mounting hole 31 is preferably set in a range of 0 to 100 μm in consideration of the mounting property of the electromagnetic valve 1 to the mounting hole 31. More preferably, it is the range of 20-50 micrometers.

ベース１１の後端側に配設された電磁部２０は、ケース２１、ボビン２２、ヨーク２３、コイル２４、プランジャ２５、シャフト２６、スプリング２７、コア２８、コネクタ２９等により構成されている。ケース２１は、円筒状の本体部２１ａと、本体部２１ａの先端側端部から径方向内方へ張り出すリング状のフランジ部２１ｂと、本体部２１ａに取り付けられたブラケット２１ｃとを有する。ケース２１は、先端側の内部にベース１１のフランジ部１１ｂを収納した状態で、ベース１１と同軸状に配設されている。ボビン２２は、樹脂材により略円筒形状に形成され、ケース２１の本体部２１ａの内側に配設されている。   The electromagnetic unit 20 disposed on the rear end side of the base 11 includes a case 21, a bobbin 22, a yoke 23, a coil 24, a plunger 25, a shaft 26, a spring 27, a core 28, a connector 29, and the like. The case 21 includes a cylindrical main body portion 21a, a ring-shaped flange portion 21b projecting radially inward from the tip end portion of the main body portion 21a, and a bracket 21c attached to the main body portion 21a. The case 21 is disposed coaxially with the base 11 in a state where the flange portion 11b of the base 11 is housed inside the tip end side. The bobbin 22 is formed in a substantially cylindrical shape from a resin material, and is disposed inside the main body 21 a of the case 21.

ヨーク２３は、円筒基部２３ａと、円筒基部２３ａの先端側端部から径方向外方に張り出すフランジ部２３ｂとからなり、磁性材料により形成されている。ヨーク２３は、フランジ部２３ｂがベース１１のフランジ部１１ｂと軸線方向に対向し、円筒基部２３ａがボビン２２の内側に位置する状態で、ボビン２２と同軸状に配設されている。また、コイル２４は、ボビン２２の外周面に巻回されている。   The yoke 23 includes a cylindrical base portion 23a and a flange portion 23b projecting radially outward from the end portion on the distal end side of the cylindrical base portion 23a, and is formed of a magnetic material. The yoke 23 is disposed coaxially with the bobbin 22 in a state where the flange portion 23 b faces the flange portion 11 b of the base 11 in the axial direction and the cylindrical base portion 23 a is positioned inside the bobbin 22. The coil 24 is wound around the outer peripheral surface of the bobbin 22.

プランジャ２５は、磁性材料により有底円筒状に形成されている。プランジャ２５は、底部側の一部がベース１１の嵌挿孔１１ｈ内に嵌挿された状態で、ヨーク２３の円筒基部２３ａの内側に軸線方向に往復移動可能に挿通されている。プランジャ２５の底部側の端面には、シャフト２６の後端側端部が同軸的に圧入固定されており、シャフト２６とプランジャ２５は一体になって軸線方向に往復移動可能となっている。プランジャ２５の円筒部の内部空間には、ばね部材としてのスプリング２７が収容されている。   The plunger 25 is formed in a bottomed cylindrical shape with a magnetic material. The plunger 25 is inserted into the inner side of the cylindrical base portion 23a of the yoke 23 so as to be reciprocally movable in a state where a part of the bottom side is fitted in the fitting insertion hole 11h of the base 11. The end of the rear end side of the shaft 26 is coaxially press-fitted and fixed to the end surface of the bottom side of the plunger 25, and the shaft 26 and the plunger 25 are integrally reciprocable in the axial direction. A spring 27 as a spring member is accommodated in the internal space of the cylindrical portion of the plunger 25.

コア２８は、磁性材料によりフランジ部付き有底円筒状に形成されている。コア２８は、ケース２１の後端側の開口部に底部側より圧入されて、プランジャ２５の後端側に同軸状に配設されている。プランジャ２５の後端側の端面とコア２８の底部外面とは、磁気ギャップを形成している。結果として、コア２８、プランジャ２５およびヨーク２３により磁気回路を形成している。コア２８の底部には、プランジャ２５の円筒部の内部空間に収容されたスプリング２７の後端側が当接し支持されている。これにより、プランジャ２５およびシャフト２６は、スプリング２７の付勢力により常時先端側へ付勢されており、シャフト２６の先端側端部は、弁室１１ｅに配設されたボール弁１６に当接し、常時ボール弁１６を先端側方向へ付勢している。   The core 28 is formed in a bottomed cylindrical shape with a flange portion from a magnetic material. The core 28 is press-fitted into the opening on the rear end side of the case 21 from the bottom side, and is coaxially disposed on the rear end side of the plunger 25. The end surface on the rear end side of the plunger 25 and the bottom outer surface of the core 28 form a magnetic gap. As a result, a magnetic circuit is formed by the core 28, the plunger 25 and the yoke 23. The rear end side of the spring 27 accommodated in the inner space of the cylindrical portion of the plunger 25 is in contact with and supported by the bottom portion of the core 28. Thereby, the plunger 25 and the shaft 26 are always urged to the tip side by the urging force of the spring 27, and the tip side end portion of the shaft 26 abuts on the ball valve 16 disposed in the valve chamber 11e, The ball valve 16 is constantly urged toward the tip side.

コネクタ２９は、ケース２１の後端側の開口部内周、およびコア２８の円筒部内周に圧入されて、コア２８の後端側に配設されている。このコネクタ２９は、コイル２４を通電するために設けられており、内部のターミナル端子２９ａは、コイル２４と電気的に接続されている。このコネクタ２９は、ターミナル端子２９ａを図略の電流制御装置等に電気的に接続することにより、コイル２４に通電する電流を制御できるようになっている。   The connector 29 is press-fitted into the inner periphery of the opening on the rear end side of the case 21 and the inner periphery of the cylindrical portion of the core 28, and is disposed on the rear end side of the core 28. The connector 29 is provided to energize the coil 24, and the internal terminal terminal 29 a is electrically connected to the coil 24. The connector 29 can control the current supplied to the coil 24 by electrically connecting the terminal terminal 29a to an unillustrated current control device or the like.

なお、本実施形態の電磁弁１は、電磁部２０の非通電時には、プランジャ２５がスプリング２７のばね力で付勢されることによりボール弁１６が第１弁座１４ａに押圧されて着座するノーマルクローズタイプのものである。   In the electromagnetic valve 1 of the present embodiment, when the electromagnetic unit 20 is not energized, the ball valve 16 is pressed against the first valve seat 14a and is seated by the plunger 25 being urged by the spring force of the spring 27. Closed type.

次に、上記のように構成された本実施形態の電磁弁１の作動について説明する。本実施形態の電磁弁１は、図１に示すように、ベース１１の円筒部１１ａが自動変速機３０に設けられた装着穴３１に嵌合されて、ブラケット２１ｃを図略のボルトで固定することによって取り付けられる。これにより、電磁弁１の供給通路１１ｃが自動変速機３０側の供給ポート３２と連通し、電磁弁１の制御通路１１ｉが自動変速機３０側の制御ポート３３と連通する。   Next, the operation of the electromagnetic valve 1 of the present embodiment configured as described above will be described. As shown in FIG. 1, the solenoid valve 1 of the present embodiment has a cylindrical portion 11a of a base 11 fitted in a mounting hole 31 provided in an automatic transmission 30, and fixes a bracket 21c with a bolt (not shown). It is attached by. Thereby, the supply passage 11c of the electromagnetic valve 1 communicates with the supply port 32 on the automatic transmission 30 side, and the control passage 11i of the electromagnetic valve 1 communicates with the control port 33 on the automatic transmission 30 side.

図１に示すように、電磁部２０のコイル２４が非通電時の状態では、スプリング２７のばね力でボール弁１６が第１弁座１４ａに押圧されて着座することにより、供給通路１１ｃと制御通路１１ｉとの連通が遮断されている一方、制御通路１１ｉとドレン通路１１ｊとは連通しているので、制御通路１１ｉの制御液圧力はドレン通路１１ｊのドレン圧となっている。この状態で、コイル２４に通電させると、コア２８、プランジャ２５およびヨーク２３により形成された前述の磁気回路に磁束が発生し、プランジャ２５は、コア２８の円筒部に向かって軸線方向に吸引され、スプリング２７の付勢力に抗して後端側に移動する。   As shown in FIG. 1, when the coil 24 of the electromagnetic unit 20 is in a non-energized state, the ball valve 16 is pressed against the first valve seat 14a by the spring force of the spring 27, thereby being controlled with the supply passage 11c. While the communication with the passage 11i is blocked, the control passage 11i and the drain passage 11j are in communication with each other, so that the control fluid pressure in the control passage 11i is the drain pressure of the drain passage 11j. When the coil 24 is energized in this state, a magnetic flux is generated in the magnetic circuit formed by the core 28, the plunger 25, and the yoke 23, and the plunger 25 is attracted in the axial direction toward the cylindrical portion of the core 28. Then, it moves to the rear end side against the urging force of the spring 27.

その結果、ボール弁１６は、供給通路１１ｃからの制御液圧力に押されて、第１弁座１４ａから離間して第２弁座１５ａに着座（当接）するので、供給通路１１ｃと制御通路１１ｉとが連通する一方、制御通路１１ｉとドレン通路１１ｊとの連通が遮断され、制御通路１１ｉの制御液圧力は供給通路１１ｃの供給圧となっている。したがって、コイル２４に通電する電流値をＯＮ／ＯＦＦすることにより、制御通路１１ｉの制御液圧力をＯＮ／ＯＦＦ制御することができる。これにより、制御対象の制御に使用される制御液の圧力・流量等を制御することができる。   As a result, the ball valve 16 is pushed by the control fluid pressure from the supply passage 11c and is separated from the first valve seat 14a and is seated (abutted) on the second valve seat 15a. 11i communicates with the control passage 11i and the drain passage 11j, and the control fluid pressure in the control passage 11i becomes the supply pressure in the supply passage 11c. Accordingly, the control fluid pressure in the control passage 11i can be controlled to be turned on / off by turning on / off the value of the current supplied to the coil 24. Thereby, the pressure, flow rate, etc. of the control liquid used for control of the controlled object can be controlled.

以上のように、本実施形態の電磁弁１によれば、第１弁座部材１４が圧入される第１圧入穴１１ｄは、ベース１１の円筒部１１ａの外周部に設けられた制御液環状溝１７の軸線方向幅Ｗの範囲内で供給通路１１ｃと弁室１１ｅとの間に形成されている。これにより、第１圧入穴１１ｄに第１弁座部材１４が圧入されたときに発生する円筒部１１ａの径方向外方への膨らみが制御液環状溝１７に吸収される。そのため、円筒部１１ａの制御液環状溝１７以外の第１および第２シール部１８、１９の外径が、第１弁座部材１４の圧入によって大きくなることが回避される。これにより、第１および第２シール部１８、１９の外径並びに装着穴の内径の公差を、第１弁座部材１４の圧入による外径の拡大を考慮して厳しく設定する必要がなくなるので、装着穴３１と第１および第２シール部１８、１９との間のシール性が向上するとともに、低コスト化が可能となる。   As described above, according to the electromagnetic valve 1 of the present embodiment, the first press-fitting hole 11 d into which the first valve seat member 14 is press-fitted is the control liquid annular groove provided in the outer peripheral portion of the cylindrical portion 11 a of the base 11. It is formed between the supply passage 11c and the valve chamber 11e within a range of 17 axial width W. As a result, the radially outward bulge of the cylindrical portion 11 a generated when the first valve seat member 14 is press-fitted into the first press-fitting hole 11 d is absorbed by the control liquid annular groove 17. Therefore, it is avoided that the outer diameters of the first and second seal portions 18 and 19 other than the control liquid annular groove 17 of the cylindrical portion 11 a are increased by the press-fitting of the first valve seat member 14. This eliminates the need to strictly set the tolerances of the outer diameters of the first and second seal portions 18 and 19 and the inner diameter of the mounting hole in consideration of the expansion of the outer diameter due to the press-fitting of the first valve seat member 14. The sealing performance between the mounting hole 31 and the first and second seal portions 18 and 19 is improved, and the cost can be reduced.

また、第２弁座部材１５が圧入される第２圧入穴１１ｆは、ベース１１の円筒部１１ａの外周部に設けられた制御液環状溝１７の軸線方向幅Ｗの範囲内でドレン通路１１ｊと弁室１１ｅとの間に形成されていることから、第２圧入穴１１ｆに第２弁座部材１５が圧入されたときに発生する円筒部１１ａの径方向外方への膨らみが制御液環状溝１７に吸収される。そのため、円筒部１１ａの制御液環状溝１７以外の第１および第２シール部１８、１９の外径が大きくなることが回避される。これにより、第１および第２シール部１８、１９の外径並びに装着穴３１の内径の公差を緩和することができるので、シール性を向上して低コスト化が可能となる。また、第２弁座部材１５がベース１１と別体に形成されるため、第２弁座部材１５の製作が容易になる。   The second press-fitting hole 11f into which the second valve seat member 15 is press-fitted is within the range of the axial width W of the control liquid annular groove 17 provided in the outer peripheral part of the cylindrical part 11a of the base 11 and the drain passage 11j. Since it is formed between the valve chamber 11e and the second valve seat member 15 is press-fitted into the second press-fitting hole 11f, the radially outward bulge of the cylindrical portion 11a is caused by the control liquid annular groove. 17 is absorbed. Therefore, it is avoided that the outer diameters of the first and second seal portions 18 and 19 other than the control liquid annular groove 17 of the cylindrical portion 11a are increased. Thereby, since the tolerance of the outer diameter of the first and second seal portions 18 and 19 and the inner diameter of the mounting hole 31 can be relaxed, the sealing performance can be improved and the cost can be reduced. In addition, since the second valve seat member 15 is formed separately from the base 11, the second valve seat member 15 can be easily manufactured.

また、第１圧入穴１１ｄと弁室１１ｅとの間には、第１弁座部材１４の先端に形成されたテーパ部の先端面が当接する第１段差１２が形成され、第２圧入穴１１ｆとドレン通路１１ｊとの間には、第２弁座部材１５の先端に形成されたテーパ部の先端面が当接する第２段差１３が形成されている。これにより、第１弁座部材１４のテーパ部と第１段差１２とにより第１空間部１２ａが形成され、第２弁座部材１５のテーパ部と第２段差１３とにより第２空間部１３ａが形成されるので、第１および第２弁座部材１４、１５のそれぞれの圧入時に発生した異物を、第１および第２空間部１２ａ、１３ａに封じ込めることができる。そのため、異物が弁部に噛み込まれることを回避することができる。また、第１および第２弁座部材１４、１５の先端にはそれぞれテーパ部が設けられているので、第１または第２圧入穴１１ｄ、１１ｆへのそれらの圧入を容易に行うことができる。   Further, a first step 12 is formed between the first press-fitting hole 11d and the valve chamber 11e so that the front end surface of the tapered portion formed at the front end of the first valve seat member 14 comes into contact with the second press-fitting hole 11f. And a drain passage 11j, a second step 13 is formed in which the tip surface of the tapered portion formed at the tip of the second valve seat member 15 abuts. Thereby, the first space portion 12 a is formed by the tapered portion of the first valve seat member 14 and the first step 12, and the second space portion 13 a is formed by the tapered portion of the second valve seat member 15 and the second step 13. Since it is formed, the foreign matter generated when the first and second valve seat members 14 and 15 are pressed into each other can be contained in the first and second space portions 12a and 13a. Therefore, it can avoid that a foreign material is bitten by the valve part. In addition, since the tapered portions are provided at the tips of the first and second valve seat members 14 and 15, respectively, they can be easily press-fitted into the first or second press-fitting holes 11d and 11f.

また、本実施形態の電磁弁１は、ノーマルクローズタイプのものであるため、ボール弁１６のクローズ時において、第１および第２シール部１８、１９に液圧が作用するが、本実施形態の電磁弁１では第１および第２シール部１８、１９と装着穴３１との間で十分なシール性を確保することができる。そのため、通常時（クローズ状態時）に、第１および第２シール部１８、１９のシール機能を確実に果たして圧力液体の漏洩を防止することができる。   In addition, since the solenoid valve 1 of the present embodiment is a normally closed type, hydraulic pressure acts on the first and second seal portions 18 and 19 when the ball valve 16 is closed. In the electromagnetic valve 1, sufficient sealing performance can be ensured between the first and second seal portions 18 and 19 and the mounting hole 31. Therefore, at the normal time (in the closed state), the sealing function of the first and second seal portions 18 and 19 can be reliably performed and leakage of the pressure liquid can be prevented.

〔他の実施形態〕
本発明は、上記の実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲で種々変更することが可能である。 [Other Embodiments]
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

例えば、上記実施形態では、ノーマルクローズタイプの電磁弁の例を説明したが、電磁部の非通電時に、ボール弁１６が第１弁座１４ａから離間して供給通路１１ｃと制御通路１１ｉとを連通するように構成されるノーマルオープンタイプの電磁弁にも本発明を適用することができる。   For example, in the above embodiment, an example of a normally closed type electromagnetic valve has been described. However, when the electromagnetic unit is not energized, the ball valve 16 is separated from the first valve seat 14a and the supply passage 11c communicates with the control passage 11i. The present invention can also be applied to a normally open type solenoid valve configured as described above.

また、上記実施形態では、単独に形成された第２弁座部材１５に第２弁座１５ａが設けられているが、円筒部１１ａの一部を利用して第２弁座１５ａを円筒部１１ａに直接設けるようにしてもよい。   Moreover, in the said embodiment, although the 2nd valve seat 15a is provided in the 2nd valve seat member 15 formed independently, the 2nd valve seat 15a is used for the cylindrical part 11a using a part of cylindrical part 11a. You may make it provide directly.

１…電磁弁、 １０…流路制御部、 １１…ベース（弁本体）、 １１ａ…円筒部、 １１ｂ…フランジ部、 １１ｃ…供給通路、 １１ｄ…第１圧入穴、 １１ｅ…弁室、 １１ｆ…第２圧入穴、 １１ｇ…円孔、 １１ｈ…嵌挿孔、 １１ｉ…制御通路、 １１ｊ…ドレン通路、 １２…第１段差、 １２ａ…第１空間部、 １３…第２段差、 １３ａ…第２空間部、 １４…第１弁座部材、 １４ａ…第１弁座、 １５…第２弁座部材、 １５ａ…第２弁座、 １６…ボール弁、 １７…制御液環状溝、 １８…第１シール部、 １９…第２シール部、 ２０…電磁部、 ２１…ケース、 ２２…ボビン、 ２３…ヨーク、 ２４…コイル、 ２５…プランジャ、 ２６…シャフト、 ２７…スプリング（ばね部材）、 ２８…コア、 ２９…コネクタ、 ３０…自動変速機、 ３１…装着穴。   DESCRIPTION OF SYMBOLS 1 ... Solenoid valve, 10 ... Flow path control part, 11 ... Base (valve main body), 11a ... Cylindrical part, 11b ... Flange part, 11c ... Supply passage, 11d ... 1st press-fit hole, 11e ... Valve chamber, 11f ... 1st 2 press-fit holes, 11g ... circular holes, 11h ... fitting insertion holes, 11i ... control passages, 11j ... drain passages, 12 ... first step, 12a ... first space portion, 13 ... second step portion, 13a ... second space portion 14 ... 1st valve seat member, 14a ... 1st valve seat, 15 ... 2nd valve seat member, 15a ... 2nd valve seat, 16 ... Ball valve, 17 ... Control liquid annular groove, 18 ... 1st seal part, DESCRIPTION OF SYMBOLS 19 ... 2nd seal part, 20 ... Electromagnetic part, 21 ... Case, 22 ... Bobbin, 23 ... Yoke, 24 ... Coil, 25 ... Plunger, 26 ... Shaft, 27 ... Spring (spring member), 28 ... Core, 29 ... Connector, 30 ... automatic transmission, 31 ... mounting holes.

Claims (4)

装着穴に嵌合されるとともに前記装着穴の軸線方向に延在する円筒部が先端に設けられた弁本体と、
前記円筒部に設けられた供給通路に連通する第１弁座と、
前記円筒部に設けられたドレン通路に連通する第２弁座と、
前記第１弁座および前記第２弁座に選択的に当接されるボール弁と、
前記第１弁座と前記第２弁座との間に配置された弁室に連通し前記円筒部の外周部に形成された制御液環状溝と、
前記制御液環状溝と前記供給通路の開口部との間に形成され、前記装着穴にシール可能に嵌合する第１シール部と、
前記制御液環状溝と前記ドレン通路の開口部との間に形成され、前記装着穴にシール可能に嵌合する第２シール部と、
前記弁本体に取り付けられ前記ボール弁を前記第１弁座または前記第２弁座に押圧させる電磁部と、
前記第１弁座が形成された第１弁座部材と、
前記第１弁座部材がその中に入れられる穴であって、前記軸線方向において前記制御液環状溝の範囲内で前記供給通路と前記弁室との間に形成され、前記第１弁座部材の外径より小径の第１穴と、
を備えた電磁弁。 A valve body that is fitted in the mounting hole and has a cylindrical portion provided at the tip thereof extending in the axial direction of the mounting hole;
A first valve seat communicating with a supply passage provided in the cylindrical portion;
A second valve seat communicating with a drain passage provided in the cylindrical portion;
A ball valve selectively abutted against the first valve seat and the second valve seat;
A control liquid annular groove formed in an outer peripheral portion of the cylindrical portion in communication with a valve chamber disposed between the first valve seat and the second valve seat;
A first seal portion that is formed between the control liquid annular groove and the opening of the supply passage, and fits in the mounting hole in a sealable manner;
A second seal portion formed between the control liquid annular groove and the opening of the drain passage, and fitted in the mounting hole so as to be sealable;
An electromagnetic part attached to the valve body and pressing the ball valve against the first valve seat or the second valve seat ;
A first valve seat member formed with the first valve seat;
Said first valve seat member is a hole to be placed therein, wherein in the axial direction is formed between the supply passage and the valve chamber within the range of the control fluid annular groove, said first valve seat member A first hole smaller in diameter than the outer diameter of
With solenoid valve. 請求項１において、
前記第２弁座が形成された第２弁座部材と、
前記第２弁座部材がその中に入れられる穴であって、前記軸線方向において前記制御液環状溝の範囲内で前記ドレン通路と前記弁室との間に形成され、前記第２弁座部材の外径より小径かつ前記第１穴より小径の第２穴と、
を備えた電磁弁。 In claim 1,
A second valve seat member formed with the second valve seat ;
The second valve seat member is a hole into which the second valve seat member is formed between the drain passage and the valve chamber within the control liquid annular groove in the axial direction, and the second valve seat member A second hole smaller in diameter than the first hole and smaller in diameter than the first hole;
With solenoid valve. 請求項２において、
前記第１穴と前記弁室との間には、前記第１弁座部材の先端に形成されたテーパ部の先端面が当接する第１段差が形成され、
前記第２穴と前記ドレン通路との間には、前記第２弁座部材の先端に形成されたテーパ部の先端面が当接する第２段差が形成されている電磁弁。 In claim 2,
Between the first hole and the valve chamber, a first step is formed in which the tip surface of the tapered portion formed at the tip of the first valve seat member abuts.
A solenoid valve in which a second step is formed between the second hole and the drain passage so that a tip surface of a tapered portion formed at a tip of the second valve seat member abuts. 請求項１〜３のいずれか一項において、
前記電磁部の非通電時には、前記電磁部のプランジャがばね部材のばね力で付勢されることにより前記ボール弁が前記第１弁座に押圧されるノーマルクローズタイプのものである電磁弁。 In any one of Claims 1-3,
An electromagnetic valve of a normally closed type in which the ball valve is pressed against the first valve seat by the plunger of the electromagnetic part being biased by the spring force of a spring member when the electromagnetic part is not energized.
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