JP4636316B2 - Electromagnetic actuator - Google Patents
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- JP4636316B2 JP4636316B2 JP2005089888A JP2005089888A JP4636316B2 JP 4636316 B2 JP4636316 B2 JP 4636316B2 JP 2005089888 A JP2005089888 A JP 2005089888A JP 2005089888 A JP2005089888 A JP 2005089888A JP 4636316 B2 JP4636316 B2 JP 4636316B2
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Description
本発明は媒体流路を形成した流路形成体に挿入して取り付け可能であり、前記媒体流路に連通する複数の開口部を有する略筒状のバルブハウジングと、前記開口部どうしの連通状態を切り替えるべく、前記バルブハウジングの内部において、当該バルブハウジングの軸心の方向に沿って摺動可能なバルブ本体を備えた電磁アクチュエータに関する。 The present invention can be inserted and attached to a flow path forming body having a medium flow path, and has a substantially cylindrical valve housing having a plurality of openings communicating with the medium flow path, and a communication state between the openings. It is related with the electromagnetic actuator provided with the valve main body which can be slid along the direction of the axial center of the said valve housing inside the said valve housing.
従来、例えば、車両制御に用いる媒体の制御弁として電磁アクチュエータが使用されており、各種装置に取付け性を考慮した構成が提案されている。(例えば、特許文献1の図1)
この特許文献1に示される電磁アクチュエータは、バルブハウジング、ソレノイド、及び取付ブラケットで構成されており、流体通路の異なる液圧装置に応じて、バルブハウジングを位置合わせするものである。電磁アクチュエータの組み付けに際しては、複数の開口部をそれぞれの媒体流路に位置合わせした状態で行われる。具体的には、バルブハウジングを軸周に回転させると共に、取付ブラケット及びソレノイドを所要の角度に位置合わせした状態で、かしめ突起を用いて、バルブハウジング、ソレノイド、及び取付ブラケットを互いにかしめ固定する。
Conventionally, for example, an electromagnetic actuator has been used as a control valve for a medium used for vehicle control, and various devices have been proposed in consideration of attachment. (For example, FIG. 1 of Patent Document 1)
The electromagnetic actuator disclosed in Patent Document 1 includes a valve housing, a solenoid, and a mounting bracket, and aligns the valve housing in accordance with hydraulic devices having different fluid passages. When assembling the electromagnetic actuator, the plurality of openings are aligned with the respective medium flow paths. Specifically, the valve housing is rotated around the shaft, and the valve housing, the solenoid, and the mounting bracket are caulked and fixed to each other using the caulking projection in a state where the mounting bracket and the solenoid are aligned at a required angle.
しかし、上記した特許文献1における電磁アクチュエータのシール構造においては、例えば、この電磁アクチュエータが、弁開閉時期制御などの油圧制御に用いられる場合には、バルブハウジングを取り付ける部位が、シリンダブロックとカムカバーとを組み合わせて構成してある場合がある。このような場合、シリンダブロックとカムカバーとの間に、組み付け時の軸ずれが生じていたり、熱変形によって両者が位置ずれしていてバルブハウジングが挿入できない場合がある。この場合、電磁アクチュエータのバルブハウジングが、軸方向に対して垂直方向の応力を受けるため、バルブ本体がロックするなど円滑に動作しないおそれがあった。 However, in the above-described electromagnetic actuator seal structure in Patent Document 1, for example, when this electromagnetic actuator is used for hydraulic control such as valve opening / closing timing control, a portion to which the valve housing is attached includes a cylinder block and a cam cover. May be configured in combination. In such a case, there is a case where the cylinder block and the cam cover are misaligned at the time of assembly, or both are displaced due to thermal deformation, and the valve housing cannot be inserted. In this case, since the valve housing of the electromagnetic actuator receives stress in a direction perpendicular to the axial direction, there is a concern that the valve body may not operate smoothly, such as locking.
特に、電磁アクチュエータのバルブハウジングを挿入するカムカバーの取付け穴の外周面に、複数の油路が放射状に形成してある場合に、バルブハウジングの挿入を容易にすべく、カムカバーとバルブハウジングとの隙間を大きくすると、複数の油路間において油が混入することになる。一方、油路間の混入を防止すべく前記隙間を狭くすると、バルブハウジングが円滑に挿入できず、バルブ本体の作動不良が生じるという不都合が顕著に生じる。 In particular, when a plurality of oil passages are formed radially on the outer peripheral surface of the mounting hole of the cam cover into which the valve housing of the electromagnetic actuator is inserted, the clearance between the cam cover and the valve housing is made easy to insert the valve housing. When the value is increased, oil is mixed between the plurality of oil passages. On the other hand, if the gap is narrowed to prevent mixing between the oil passages, the valve housing cannot be smoothly inserted, causing a disadvantage that the valve body malfunctions.
そこで、本発明は上記実状に鑑み、バルブハウジングの取り付けが容易であり、長期に亘ってバルブ本体の機能を健全に維持し得る電磁アクチュエータを提供することを目的とする。 SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide an electromagnetic actuator that can be easily attached to a valve housing and can maintain the function of the valve main body for a long time.
(特徴構成1)
本発明に係る電磁アクチュエータの第1の特徴構成は、媒体流路を形成した流路形成体に挿入して取り付け可能であり、前記媒体流路に連通する複数の開口部を有する略筒状のバルブハウジングと、前記開口部どうしの連通状態を切り替えるべく、前記バルブハウジングの内部において、当該バルブハウジングの軸心の方向に沿って摺動可能なバルブ本体を備えたものであって、前記バルブハウジングを前記流路形成体に挿入したとき、前記流路形成体の一部に挿入方向奥側の端部が当接してその外周面が拡径変形し、前記バルブハウジングと前記流路形成体とに密着するシール部材を、前記バルブハウジングの外周面に備え、前記シール部材を取り付けるよう、前記バルブハウジングの外周面に周方向に連続した環状の第1溝部を設けてあり、当該第1溝部が、前記軸心と同軸心状の円筒面と、前記バルブハウジングの挿入方向手前側ほど拡径した円錐面と、前記円筒面および前記円錐面のうち少なくとも何れか一方に前記シール部材が変形したときに前記シール部材の一部が充填される空間として形成した周方向に連続する環状の第2溝部とを、前記バルブハウジングの挿入方向手前側から奥側に向けて、前記円錐面、前記第2溝部、前記円筒面の順に設けた点にある。
(Feature configuration 1)
The first characteristic configuration of the electromagnetic actuator according to the present invention can be inserted and attached to a flow path forming body in which a medium flow path is formed, and has a substantially cylindrical shape having a plurality of openings communicating with the medium flow path. A valve body slidable along the direction of the axis of the valve housing inside the valve housing in order to switch the communication state between the valve housing and the opening. Is inserted into the flow path forming body, an end on the back side in the insertion direction is in contact with a part of the flow path forming body, and the outer peripheral surface thereof is expanded in diameter, and the valve housing, the flow path forming body, A seal member that is closely attached to the valve housing is provided on the outer peripheral surface of the valve housing, and an annular first groove portion that is continuous in the circumferential direction is provided on the outer peripheral surface of the valve housing so as to attach the seal member. The first groove is formed on at least one of the cylindrical surface and the conical surface, the cylindrical surface coaxial with the shaft center, the conical surface whose diameter increases toward the front side in the insertion direction of the valve housing, and the conical surface. An annular second groove portion continuous in the circumferential direction formed as a space filled with a part of the seal member when the seal member is deformed, from the front side to the back side in the insertion direction of the valve housing, The conical surface, the second groove, and the cylindrical surface are provided in this order .
(効果)
本構成であれば、バルブハウジングを流路形成体に挿入したとき、変形した前記シール部材の一部が、前記バルブハウジングの外周面と前記シール部材の内周面との間に設けた空間の内部に充填されることによって、シール部材の内部に発生する応力集中を緩和することができる。この結果、シール部材の耐久性が高まり、電磁アクチュエータの信頼性を高めることができる。
(effect)
In this configuration, when the valve housing is inserted into the flow path forming body, a part of the deformed seal member is a space provided between the outer peripheral surface of the valve housing and the inner peripheral surface of the seal member. By filling the inside, stress concentration generated inside the seal member can be reduced. As a result, the durability of the seal member is increased and the reliability of the electromagnetic actuator can be increased.
変形したシール部材の一部が退避できる前記空間は、原則として、前記バルブハウジングの外周面と前記シール部材の内周面との間であれば、何れの部材の側に設けても良い。ただし、一般的には、前記シール部材は変形容易な材料で構成され、前記バルブハウジングは、容易には変形しない剛性の高い材料で構成されることが多い。これら変形の容易さ等は、加工精度に影響する。そのため、剛性の高いバルブハウジングの側に前記空間を形成することで、精度の安定した電磁アクチュエータを得ることができる。 In principle, the space in which a part of the deformed seal member can be retracted may be provided on any member side as long as it is between the outer peripheral surface of the valve housing and the inner peripheral surface of the seal member. However, in general, the seal member is made of a material that can be easily deformed, and the valve housing is often made of a highly rigid material that is not easily deformed. The ease of these deformations affects the processing accuracy. Therefore, an electromagnetic actuator with stable accuracy can be obtained by forming the space on the highly rigid valve housing side.
本構成のごとく、第1溝部に三つの部分を構成することで、シール部材の保持に必要な機能を発揮させることができる。
即ち、前記軸心と同軸心状の円筒面を備えることで、装着したシール部材が軸心に対して偏心するのを防止することができる。この結果、例えば、流路形成体にバルブハウジングを挿入する際に、流路形成体にシール部材が干渉するようなことがなく、バルブハウジングの取り付け作業を容易にすることができる。
また、前記円錐面を設けることで、バルブハウジングを流路形成体に挿入したとき、流路形成体の一部から押圧力を受けたシール部材が挿入方向手前側に押し込まれ、径外方向に容易に拡径することができる。これにより、シール部材と流路形成体との間を確実に密封することができる。
さらに、第1溝部の内部に第2溝部を設けることで、シール部材が変形する際に、当該変形部分の一部を確実に退避させることができるため、シール部材の応力集中を有効に緩和することができる。
これらの機能が発揮されることで、信頼性の高い電磁アクチュエータを得ることができる。
Like this structure , a function required for holding | maintenance of a sealing member can be exhibited by comprising three parts in a 1st groove part.
That is, by providing the cylindrical surface coaxial with the shaft center, it is possible to prevent the attached seal member from being eccentric with respect to the shaft center. As a result, for example, when the valve housing is inserted into the flow path forming body, the seal member does not interfere with the flow path forming body, and the mounting operation of the valve housing can be facilitated.
Also, by providing the conical surface, when the valve housing is inserted into the flow path forming body, the seal member that has received a pressing force from a part of the flow path forming body is pushed toward the front side in the insertion direction, and in the radially outward direction. The diameter can be easily expanded. Thereby, between a sealing member and a flow-path formation body can be sealed reliably.
Furthermore, by providing the second groove portion inside the first groove portion, when the seal member is deformed, a part of the deformed portion can be surely retracted, so that the stress concentration of the seal member is effectively reduced. be able to.
By exhibiting these functions, a highly reliable electromagnetic actuator can be obtained.
本発明に係るシール部材は変形容易な部材であり、前記第1溝部に安定的に保持できるよう嵌着することが多い。そして、バルブハウジングに装着した場合、前記第2溝部では、シール部材とバルブハウジングとは離間しているから、シール部材は、前記円筒面及び前記円錐面に当接することとなる。この両面のうち円錐面は、シール部材の押し込みに応じて拡径させる機能を有するから、その位置は、必然的にバルブハウジングの挿入方向手前側となる。よって、シール部材を安定的に保持するためには、前記円筒面は、第1溝部のうち、バルブハウジングの挿入方向奥側の位置に設けるのが好ましい。 The seal member according to the present invention is an easily deformable member and is often fitted so as to be stably held in the first groove portion. When mounted on the valve housing, since the seal member and the valve housing are separated from each other in the second groove portion, the seal member comes into contact with the cylindrical surface and the conical surface. Of these two surfaces, the conical surface has a function of expanding the diameter in response to the pressing of the seal member, and therefore the position is necessarily the front side in the insertion direction of the valve housing. Therefore, in order to stably hold the seal member, it is preferable that the cylindrical surface is provided at a position on the back side in the insertion direction of the valve housing in the first groove portion.
この場合、前記第2溝部は、前記円筒面と前記円錐面との中間の位置となる。この位置は、流路形成体がシール部材に当接する位置に対して、押し込み方向下流側であって、且つ、軸心の側である。この位置は、流路形成体からの押し込み力が及び易い位置である。
本構成であれば、シール部材を安定的に保持できると共に、シール部材を確実に拡径することができ、しかも、シール部材の一部変形を許容して応力手中の高まりを緩和することができる。即ち、取り付けが容易で、耐久性・信頼性に優れた電磁アクチュエータを得ることができる。
In this case, the second groove portion is at an intermediate position between the cylindrical surface and the conical surface. This position is on the downstream side in the pushing direction with respect to the position where the flow path forming body abuts on the seal member, and is on the axial center side. This position is a position where the pushing force from the flow path forming body is easily reached.
If it is this structure, while being able to hold | maintain a sealing member stably, a sealing member can be diameter-expanded reliably, and also a partial deformation | transformation of a sealing member is permitted and the rise in a stress hand can be relieved. . That is, it is possible to obtain an electromagnetic actuator that is easy to mount and excellent in durability and reliability.
(概要)
本発明は、媒体流路を形成した流路形成体に挿入して取り付け可能な、電磁アクチュエータに関する。そのような電磁アクチュエータとしては、例えば、車両用エンジンの弁開閉時期制御装置に作動用オイルを供給するソレノイドバルブがある。当該ソレノイドバルブは、弁開閉時期制御装置に設けた弁体を進角側あるいは遅角側に作動させるべく、媒体流路である複数のオイル供給路に、順次、オイルを切り替え供給するものである。
(Overview)
The present invention relates to an electromagnetic actuator that can be inserted and attached to a flow path forming body in which a medium flow path is formed. As such an electromagnetic actuator, for example, there is a solenoid valve that supplies operating oil to a valve opening / closing timing control device of a vehicle engine. The solenoid valve sequentially supplies and supplies oil to a plurality of oil supply passages that are medium passages in order to operate the valve body provided in the valve opening / closing timing control device to the advance side or the retard side. .
当該バルブハウジングは略筒状であり、前記複数のオイル供給路に連通する複数の開口部を備えている。また、前記開口部どうしの連通状態を切り替えるべく、バルブハウジングの内部には、当該バルブハウジングの軸心方向に沿って摺動可能なバルブ本体を備えている。当該バルブ本体は、バルブハウジングに隣接して設けたソレノイドによって駆動される。
以下、本実施形態ではソレノイドバルブを例にとりつつ、図面を参照しながら本件発明の内容について説明する。
The valve housing has a substantially cylindrical shape and includes a plurality of openings that communicate with the plurality of oil supply paths. In addition, in order to switch the communication state between the openings, a valve body is provided inside the valve housing that can slide along the axial direction of the valve housing. The valve body is driven by a solenoid provided adjacent to the valve housing.
Hereinafter, in the present embodiment, the content of the present invention will be described with reference to the drawings, taking a solenoid valve as an example.
(ソレノイドバルブの構成)
図1は電磁アクチュエータ1の一例として、ソレノイドバルブ1Aの構成を示す部分断面図である。このソレノイドバルブ1Aは、車両用エンジンの弁開閉時期開閉制御に用いる。エンジンの図示は省略するが、当該ソレノイドバルブ1Aは、流路形成体Bの一例としてのエンジンのシリンダヘッド2およびカムカバー3に取り付けてある。カムカバー3には、ソレノイドバルブ1Aからエンジン本体に戻る油の戻り油路4が形成されている。カムカバー3には、ソレノイドバルブ1Aの本体であるバルブハウジング5の軸心Xに対して、放射状に第1油路R1・第2油路R2・第3油路R3が形成してある。
(Configuration of solenoid valve)
FIG. 1 is a partial cross-sectional view showing a configuration of a solenoid valve 1A as an example of an electromagnetic actuator 1. This solenoid valve 1A is used for valve opening / closing timing opening / closing control of a vehicle engine. Although illustration of the engine is omitted, the solenoid valve 1A is attached to a cylinder head 2 and a cam cover 3 of the engine as an example of the flow path forming body B. The cam cover 3 is formed with an oil return oil passage 4 that returns from the solenoid valve 1A to the engine body. The cam cover 3 is formed with a first oil path R1, a second oil path R2, and a third oil path R3 radially with respect to the axis X of the valve housing 5 that is the main body of the solenoid valve 1A.
ソレノイドバルブ1Aは、主に、バルブハウジング5と、当該バルブハウジング5の内部で摺動するバルブ本体6、さらに、当該バルブ本体6を駆動するソレノイドS、および、当該ソレノイドバルブ1Aをカムカバー3に取付けるためのブラケット7を備えている。このブラケット7はソレノイドケース8に固定してある。このブラケット7は、ボルト9を用いてカムカバー3に固定することができる。 The solenoid valve 1 </ b> A mainly includes a valve housing 5, a valve main body 6 that slides inside the valve housing 5, a solenoid S that drives the valve main body 6, and the solenoid valve 1 </ b> A attached to the cam cover 3. A bracket 7 is provided. The bracket 7 is fixed to the solenoid case 8. The bracket 7 can be fixed to the cam cover 3 using bolts 9.
バルブハウジング5の挿入方向奥側の先端部には溝部10の一例としての第1溝部10Aを設けてある。この第1溝部10Aには外方からシール部材11を嵌着する。詳細は後述するが、当該シール部材11は、シリンダヘッド2の内周面およびカムカバー3の内周面、バルブハウジング5の外周面の三者に当接し、前記カムカバー3に形成した第1油路R1・第2油路R2・第3油路R3の各油路どうしを確実に分離する機能を有する。図3には、カムカバー3およびシリンダヘッド2の内面形状を示すが、カムカバー3の内面にシール部材11が確実に当接することで、例えば、カムカバー3の内面を第1油路R1と第2油路R2とが連通するのを防止することができる。 A first groove portion 10 </ b> A as an example of the groove portion 10 is provided at the distal end of the valve housing 5 in the insertion direction. The seal member 11 is fitted into the first groove portion 10A from the outside. Although the details will be described later, the seal member 11 is in contact with three members of the inner peripheral surface of the cylinder head 2, the inner peripheral surface of the cam cover 3, and the outer peripheral surface of the valve housing 5, and a first oil passage formed in the cam cover 3. It has a function of reliably separating the oil paths of R1, second oil path R2, and third oil path R3. FIG. 3 shows the inner shapes of the cam cover 3 and the cylinder head 2, but the seal member 11 reliably contacts the inner surface of the cam cover 3, for example, so that the inner surface of the cam cover 3 is connected to the first oil passage R 1 and the second oil passage. It is possible to prevent communication with the path R2.
ソレノイドSは、その外筒を構成するソレノイドケース8の内部に、磁気回路を形成するためのフロントヨーク12およびリアヨーク13と、通電によって電磁力を発生させるコイル14、さらには、当該電磁力によって摺動するプランジャ15およびシャフト16を備えている。前記コイル14はコネクタ17と電気的に接続してある。リアヨーク13にはキャップ18が圧入され、コイル14を外部からシールするとともに、非通電時のプランジャ15の基本位置を決定する。前記シャフト16の先端側には、ボール19を介して前記バルブ本体6が当接する。ただし、バルブ本体6は、常にスプリング20によってソレノイドSの側に付勢される。 The solenoid S includes a front yoke 12 and a rear yoke 13 for forming a magnetic circuit, a coil 14 for generating an electromagnetic force when energized, and a sliding force generated by the electromagnetic force. A moving plunger 15 and a shaft 16 are provided. The coil 14 is electrically connected to the connector 17. A cap 18 is press-fitted into the rear yoke 13 to seal the coil 14 from the outside and determine the basic position of the plunger 15 when not energized. The valve body 6 is in contact with the tip end side of the shaft 16 via a ball 19. However, the valve body 6 is always biased toward the solenoid S by the spring 20.
バルブハウジング5は、カムカバー3に挿入される。カムカバー3には、上述のごとく、第1油路R1・第2油路R2・第3油路R3が形成してある。一方、バルブハウジング5には、これらの油路にそれぞれ連通する開口部Kである第1開口部K1・第2開口部K2・第3開口部K3が形成してある。バルブハウジング5の内部には、バルブハウジング5の内径とほぼ等しい外径を有するバルブ本体6を設けてあり、このバルブ本体6をソレノイドSによって電気的に駆動することで、前記各油路に対する前記各開口部Kの連通状態を切り替える。 The valve housing 5 is inserted into the cam cover 3. As described above, the cam cover 3 is formed with the first oil passage R1, the second oil passage R2, and the third oil passage R3. On the other hand, the valve housing 5 is formed with a first opening K1, a second opening K2, and a third opening K3, which are openings K communicating with these oil passages. A valve body 6 having an outer diameter substantially equal to the inner diameter of the valve housing 5 is provided inside the valve housing 5, and the valve body 6 is electrically driven by a solenoid S, so that The communication state of each opening K is switched.
例えば、図2(a)に示すように、バルブ本体6をソレノイドSの側に引退させた場合には、第1油路R1からバルブ本体6の第1開口部K1に流入した油が、第2開口部K2および第2油路R2に流れる。一方、ソレノイドSに通電して、プランジャ15がソレノイドSから遠ざかる位置に変位した場合には、図2(b)に示すように、第1油路R1からバルブ本体6の第1開口部K1に流入した油は、第3開口部K3および第3油路R3に供給先を変更して流れる。 For example, as shown in FIG. 2A, when the valve body 6 is retracted to the solenoid S side, the oil that has flowed from the first oil passage R1 into the first opening K1 of the valve body 6 2 flows to the opening K2 and the second oil passage R2. On the other hand, when the solenoid S is energized and the plunger 15 is displaced to a position away from the solenoid S, as shown in FIG. 2B, the first oil passage R1 enters the first opening K1 of the valve body 6. The oil that flows in flows into the third opening K3 and the third oil passage R3 by changing the supply destination.
(シール部材)
図4は、バルブハウジング5の先端部にシール部材11を嵌着する場合の、嵌着前と嵌着後の状態を示している。シール部材11は、略台形の断面を有する環状部材であり、台形をなす円錐面が軸心Xの側に向く。
当該シール部材11がバルブハウジング5に嵌着された状態では、シール部材11の外表面とバルブハウジング5の外表面とは略面一の円筒表面となる。
(Seal member)
FIG. 4 shows a state before and after fitting when the seal member 11 is fitted to the tip of the valve housing 5. The seal member 11 is an annular member having a substantially trapezoidal cross section, and a conical surface having a trapezoidal shape faces the axis X side.
In a state where the seal member 11 is fitted to the valve housing 5, the outer surface of the seal member 11 and the outer surface of the valve housing 5 are substantially flush with each other.
シール部材11の材質は、シール対象とする流体の種類によって決定される。主なものとしては、ニトリルゴム・アクリルゴム・スチロールゴム・フッ素ゴム・エチレンプロピレンゴム等の合成ゴムにより構成する。 The material of the seal member 11 is determined by the type of fluid to be sealed. The main one is composed of synthetic rubber such as nitrile rubber, acrylic rubber, styrene rubber, fluorine rubber, and ethylene propylene rubber.
(シール部材を取り付ける第1溝部)
図4に示すごとく、前記シール部材11は、バルブハウジング5のうち挿入方向奥側の外表面に設けた第1溝部10Aに外嵌して装着する。
当該第1溝部10Aの断面形状は、図4および図5に示すごとく、前記シール部材11の内周面側の形状に一致するよう略台形状である。第1溝部10Aは、さらに、バルブハウジング5の軸心Xと同軸心状の円筒面F1と、バルブハウジング5の挿入方向手前側ほど拡径した円錐面F2と、前記円筒面F1および前記円錐面F2のうち少なくとも何れか一方に、本発明の空間に相当する凹部100の一例として形成した、周方向に連続する環状の第2溝部10aとを備えている。
(First groove for attaching the seal member)
As shown in FIG. 4, the seal member 11 is fitted and attached to the first groove portion 10 </ b> A provided on the outer surface of the valve housing 5 on the back side in the insertion direction.
As shown in FIGS. 4 and 5, the cross-sectional shape of the first groove portion 10 </ b> A is substantially trapezoidal so as to match the shape on the inner peripheral surface side of the seal member 11. The first groove portion 10A further includes a cylindrical surface F1 coaxial with the axis X of the valve housing 5, a conical surface F2 whose diameter is increased toward the front side in the insertion direction of the valve housing 5, and the cylindrical surface F1 and the conical surface. At least one of F2 is provided with an annular second groove portion 10a that is formed as an example of a recess 100 corresponding to the space of the present invention and that is continuous in the circumferential direction.
(円筒面)
当該円筒面F1は、例えば図5(a)に示すごとく、嵌着されたシール部材11の内周面に当接して、シール部材11の径方向の位置ずれを防止する。例えば、カムカバー3とシリンダヘッド2とにバルブハウジング5を挿入する際には、カムカバー3とシリンダヘッド2との挿入開口部が工作精度の不足などにより偏心している場合がある。このような場合でも、バルブハウジング5の先端部を円滑に挿入できるよう、前記シール部材11をバルブハウジング5に対して同軸心状に保持する必要がある。前記円筒面F1は、このようなシール部材11の心合わせ機能を備えている。よって、円筒面F1は、第1溝部10Aの中において、バルブハウジング5の挿入方向先端側に設けるのが好ましい。
(Cylindrical surface)
For example, as shown in FIG. 5A, the cylindrical surface F <b> 1 abuts on the inner peripheral surface of the fitted seal member 11 to prevent the radial displacement of the seal member 11. For example, when the valve housing 5 is inserted into the cam cover 3 and the cylinder head 2, the insertion opening between the cam cover 3 and the cylinder head 2 may be eccentric due to lack of work accuracy. Even in such a case, it is necessary to hold the seal member 11 coaxially with respect to the valve housing 5 so that the tip of the valve housing 5 can be smoothly inserted. The cylindrical surface F <b> 1 has such a centering function of the seal member 11. Therefore, it is preferable to provide the cylindrical surface F1 on the distal end side in the insertion direction of the valve housing 5 in the first groove portion 10A.
(円錐面)
当該円錐面F2は、バルブハウジング5をカムカバー3およびシリンダヘッド2に挿入するとき、シリンダヘッド2の一部から押圧力を受けたシール部材11がソレノイドSの側に押し込まれ、径外方向への拡径を容易にするためのものである。拡径したシール部材11は、カムカバー3およびシリンダヘッド2、バルブハウジング5の三者間を密封する。このような機能を発揮する当該円錐面F2は、第1溝部10Aのうち挿入方向手前側に設けるのが好ましい。
当該円錐面F2の傾斜角度は、例えば図5に示すごとく、バルブハウジング5の軸心Xに対しておよそ30〜45度程度とするのが好ましい。この角度が小さ過ぎるとシール部材11の押し込みに際してシール部材11の拡径程度が少なくなる。一方、この角度が大き過ぎると、押し込み力の多くがシール部材11を軸心方向に圧縮させることに消費されてしまい、シール部材11を十分に拡径させることができなくなる。
(Conical surface)
When the valve housing 5 is inserted into the cam cover 3 and the cylinder head 2, the conical surface F <b> 2 is pushed toward the solenoid S by the seal member 11 that has received a pressing force from a part of the cylinder head 2, so It is for facilitating the diameter expansion. The expanded seal member 11 seals the cam cover 3, the cylinder head 2, and the valve housing 5. The conical surface F2 that exhibits such a function is preferably provided on the front side in the insertion direction of the first groove portion 10A.
For example, as shown in FIG. 5, the inclination angle of the conical surface F <b> 2 is preferably about 30 to 45 degrees with respect to the axis X of the valve housing 5. If the angle is too small, the diameter of the seal member 11 is reduced when the seal member 11 is pushed. On the other hand, if this angle is too large, much of the pushing force is consumed in compressing the seal member 11 in the axial direction, and the seal member 11 cannot be sufficiently expanded in diameter.
当該円錐面F2の終点、即ち、バルブハウジング5の軸心方向に沿ったソレノイドSの側の端部には、前記軸心Xの方向に垂直な壁面F3を設けてある。この壁面F3は、前記押圧を受けたシール部材11が当接して、シール部材11がそれ以上、ソレノイドSの側に変位するのを防止し、前記軸心Xの方向に沿った適度の圧縮力をシール部材11に作用させるものである。
尚、シール部材11が押し込み力を受ける前の図5(a)の状態では、シール部材11と壁面F3とが当接した状態を示している。しかし、押し込み力が作用する前の状態では、シール部材11と壁面F3とが離間していても構わない。
A wall surface F3 perpendicular to the direction of the axis X is provided at the end of the conical surface F2, that is, the end of the solenoid housing S along the axis of the valve housing 5. The wall surface F3 prevents the seal member 11 that has received the pressure from coming into contact with the seal member 11 and further displaces the seal member 11 toward the solenoid S, so that an appropriate compressive force along the direction of the axis X is obtained. Is applied to the seal member 11.
In addition, in the state of Fig.5 (a) before the sealing member 11 receives pushing force, the state which the sealing member 11 and the wall surface F3 contact | abutted is shown. However, in a state before the pushing force is applied, the seal member 11 and the wall surface F3 may be separated from each other.
(第2溝部)
本実施形態では、図5に示すごとく、円筒面F1と円錐面F2との間に第2溝部10aを設けてある。この第2溝部10aは、バルブハウジング5の挿入時に押し込み力を受けて変形するシール部材11の一部が充填される凹部100として機能する。このような凹部100を形成しておくことで、変形したシール部材11の一部が退避することができ、シール部材11の局部に応力が集中するのを防止することができる。
(Second groove)
In the present embodiment, as shown in FIG. 5, the second groove portion 10a is provided between the cylindrical surface F1 and the conical surface F2. The second groove portion 10a functions as a recess 100 that is filled with a part of the seal member 11 that is deformed by receiving a pushing force when the valve housing 5 is inserted. By forming such a recess 100, a part of the deformed seal member 11 can be retracted, and stress can be prevented from concentrating on the local portion of the seal member 11.
図5には、シール部材11につき、ソレノイドバルブ1Aを装着する前の状態(図5(a))と、装着した後の状態(図5(b))とを示す。また、図6(a)には、図5(b)の状態におけるシール部材11の内部応力の分布状態を示している。尚、図6(b)は、第2溝部10aを設けない従来の構成における、シール部材11の内部応力の分布状態を示す比較図である。 FIG. 5 shows a state of the seal member 11 before the solenoid valve 1A is mounted (FIG. 5A) and a state after the mounting (FIG. 5B). FIG. 6A shows a distribution state of internal stress of the seal member 11 in the state shown in FIG. FIG. 6B is a comparative view showing a distribution state of internal stress of the seal member 11 in a conventional configuration in which the second groove portion 10a is not provided.
シリンダヘッド2の一部によって、シール部材11の端面のうち外周部分が押圧されると、シール部材11は、前記円錐面F2の側に押し込まれ、円錐面F2に沿って摺動しつつ拡径する。この拡径によって、シール部材11の外周面がシリンダヘッド2及びカムカバー3の内周面に当接する。同時に、シール部材11の内周面の側が前記第2溝部10aに入り込む。 When the outer peripheral portion of the end surface of the seal member 11 is pressed by a part of the cylinder head 2, the seal member 11 is pushed into the conical surface F2 side, and the diameter of the seal member 11 is increased while sliding along the conical surface F2. To do. Due to this diameter expansion, the outer peripheral surface of the seal member 11 comes into contact with the inner peripheral surfaces of the cylinder head 2 and the cam cover 3. At the same time, the inner peripheral surface side of the seal member 11 enters the second groove portion 10a.
シール部材11に作用する押し込み力は、図5に示すごとく、主に外周部に集中する。この力は、そのまま押し込み方向下流側に伝達され、前記円錐面F2の近傍に位置するシール部材11の一部分を拡径変形させる。バルブハウジング5とカムカバー3等とを密封するには、少なくとも当該円錐面F2の近傍に位置する部分が拡径変形すればよく、円錐面F2から離れて軸心Xの側に近いシール部材11の部分は、前記密封には必ずしも寄与しない。むしろ、前記押し込み力の入力部から軸心Xの側に離間した部分は、シール部材11が押し込まれる際の抵抗になる場合もある。現に、図6(b)には、押し込み力を受けた部分から軸心Xの側の円筒面F1の近傍に亘って応力の高まりが認められる。これに対し、第2溝部10aを形成した図6(a)では、第2溝部10aにシール部材11の一部が退避し、この部分の応力集中は緩和されていることがわかる。シリンダヘッド2およびカムカバー3に対するシール部材11の当接状態は、図6(a)および図6(b)の両者とも十分である。
このように、第2溝部10aを形成することで、シール部材11の内部における応力集中の高まりを緩和することができ、シール部材11の耐久性を高めることができる。
As shown in FIG. 5, the pushing force acting on the seal member 11 is mainly concentrated on the outer peripheral portion. This force is transmitted to the downstream side in the pushing direction as it is, and expands and deforms a part of the seal member 11 located in the vicinity of the conical surface F2. In order to seal the valve housing 5 and the cam cover 3 and the like, at least a portion located in the vicinity of the conical surface F2 only needs to undergo a diameter expansion deformation, and the seal member 11 is separated from the conical surface F2 and close to the axis X side. The part does not necessarily contribute to the sealing. Rather, the portion spaced from the input portion of the pressing force toward the axis X side may become a resistance when the seal member 11 is pressed. Actually, in FIG. 6B, an increase in stress is recognized from the portion receiving the pushing force to the vicinity of the cylindrical surface F1 on the axis X side. On the other hand, in FIG. 6A in which the second groove portion 10a is formed, it can be seen that a part of the seal member 11 is retracted in the second groove portion 10a, and the stress concentration in this portion is relaxed. The contact state of the seal member 11 with respect to the cylinder head 2 and the cam cover 3 is sufficient in both FIG. 6 (a) and FIG. 6 (b).
In this way, by forming the second groove portion 10a, the increase in stress concentration inside the seal member 11 can be alleviated, and the durability of the seal member 11 can be improved.
当該第2溝部10aのような凹部100は、シール部材11およびバルブハウジング5のうち何れの側に設けても構わない。ただし、加工精度などを考慮すると、変形し易いシール部材11に設けるよりも、剛性の高いバルブハウジング5の側に形成した方が精度良く設定することができる。 The concave portion 100 such as the second groove portion 10 a may be provided on either side of the seal member 11 and the valve housing 5. However, in consideration of processing accuracy and the like, it is possible to set with higher accuracy when formed on the side of the valve housing 5 having higher rigidity than when the seal member 11 is easily deformed.
さらに、前記第2溝部10aは、例えば前記軸心Xを含む断面視において、前記バルブハウジング5に取り付けられた前記シール部材11のうち、前記シリンダヘッド2等が当接する挿入方向奥側の端部の位置に対し、前記軸心Xの側であって、且つ、前記軸心Xに平行な方向から前記バルブハウジングの挿入方向手前側に向かって略45度の位置に設けるのが好ましい。
つまり、押し込み力を受けたシール部材11のうち、シリンダヘッド2との当接位置から軸心Xの方向に沿ってソレノイドS側に位置する部分は径外方向に拡径する必要があるから、前記第2溝部10aを設けて変形を緩和することは好ましくない。一方、前記当接位置から軸心Xの側に向く略垂直な方向に第2溝部10aを設けても、この領域に及ぶ押し込み力の分力は小さく、シール部材11の変形を緩和させる必要性に乏しい。よって、これらの中間領域である、前記略45度の位置に第2溝部10aを設けることで、最も効果的にシール部材11の応力集中を緩和することができる。
Further, the second groove portion 10a is, for example, in the cross-sectional view including the shaft center X, of the seal member 11 attached to the valve housing 5, the end portion on the back side in the insertion direction with which the cylinder head 2 or the like abuts. It is preferable that it is provided at a position of approximately 45 degrees from the direction parallel to the axis X toward the front side in the insertion direction of the valve housing .
That is, in the seal member 11 that has received the pushing force, the portion located on the solenoid S side along the direction of the axis X from the contact position with the cylinder head 2 needs to expand in the radially outward direction. It is not preferable to reduce the deformation by providing the second groove 10a. On the other hand, even if the second groove portion 10a is provided in a substantially vertical direction from the contact position toward the axis X, the component force of the pushing force reaching this region is small, and it is necessary to alleviate the deformation of the seal member 11 It is scarce. Therefore, the stress concentration of the seal member 11 can be alleviated most effectively by providing the second groove portion 10a at the position of approximately 45 degrees, which is the intermediate region.
前記第1溝部10Aにおける前記円錐面F2、前記第2溝部10a、前記円筒面F1の形成位置は、上述の種々の要因に鑑みれば、前記バルブハウジング5の挿入方向手前側から奥側に向けてこの順序に形成するのが好ましい。
本構成であれば、上述のごとく、押し込み力を受けたシール部材11の応力集中を、第1溝部10Aの中間位置に設けた第2溝部10aによって緩和し、挿入方向奥側に設けた前記円筒面F1によってシール部材11を軸心Xと同心状に維持することで、挿入時のシリンダヘッド2等への引っ掛かりを防止し、挿入方向手前側に設けた前記円錐面F2によって、押し込み力を受けたシール部材11を確実に拡径することができるという作用効果が得られる。
また、バルブハウジング5を挿入する際に、前記円錐面F2もシール部材11の軸心Xをバルブハウジング5の軸心Xに合わせるという機能を発揮する。よって、前記円筒面F1と円錐面F2とを第1溝部10Aの挿入方向奥側と手前側とに分けて形成することで、シール部材11の保持状態が極めて安定したものとなる。
In consideration of the various factors described above, the formation positions of the conical surface F2, the second groove portion 10a, and the cylindrical surface F1 in the first groove portion 10A are from the front side to the back side in the insertion direction of the valve housing 5. It is preferable to form in this order.
If it is this structure, as mentioned above, the stress concentration of the seal member 11 that has received the pushing force is relaxed by the second groove portion 10a provided at the intermediate position of the first groove portion 10A, and the cylinder provided at the back in the insertion direction. By maintaining the seal member 11 concentrically with the axis X by the surface F1, it is possible to prevent the cylinder head 2 and the like from being caught during insertion, and the conical surface F2 provided on the front side in the insertion direction receives a pushing force. The effect that the diameter of the seal member 11 can be reliably expanded is obtained.
Further, when the valve housing 5 is inserted, the conical surface F <b> 2 also exhibits a function of aligning the axis X of the seal member 11 with the axis X of the valve housing 5. Therefore, the holding state of the seal member 11 becomes extremely stable by forming the cylindrical surface F1 and the conical surface F2 separately on the back side and the near side in the insertion direction of the first groove portion 10A.
〔第1の別実施形態〕
尚、図5では、バルブハウジング5の側に第2溝部10aを設けたが、シール部材11の側に設けてもよい。シール部材11に設ける場合には、材料の加工のし易さ等の問題から、凹部100の断面積がある程度変動する可能性がある。しかし、押圧されたシール部材11のうち、拡径してカムカバー3等に密着する部位とは異なる部位の応力集中を緩和できるのであれば、長期間に亘って押し込み力を受けるシール部材11に亀裂が発生するのを防止できる等の利点が得られるため、何れの部材に形成しても構わない。
さらには、バルブハウジング5とシール部材11との両者に前記第2溝部10aを設けるものであっても良い。
[First Alternative Embodiment]
In FIG. 5, the second groove portion 10 a is provided on the valve housing 5 side, but may be provided on the seal member 11 side. When the seal member 11 is provided, the cross-sectional area of the recess 100 may fluctuate to some extent due to problems such as ease of material processing. However, if the stress concentration in the portion of the pressed seal member 11 that is different from the portion that is enlarged in diameter and is in close contact with the cam cover 3 or the like can be relieved, the seal member 11 that receives the pushing force over a long period is cracked. Since it is possible to obtain an advantage such as preventing the occurrence of the occurrence, it may be formed on any member.
Furthermore, the second groove portion 10a may be provided in both the valve housing 5 and the seal member 11.
〔第2の別実施形態〕
上記実施形態では、主にシール部材11の心合わせを第1溝部10Aに形成した円筒面F1で行う例を示した。しかし、この他にも図7に示す構成であってもよい。
即ち、第1溝部10Aがある程度深く形成されていて、シール部材11の内周面が円筒面F1に当接しないものであってもよい。この場合、シール部材11の位置保持は、主に、前記円錐面F2との当接によって行う。そして、バルブハウジング5の挿入方向先端側におけるシール部材11の心合わせは、シール部材11の一部を外側から係止する構成とする。
[Second alternative embodiment]
In the said embodiment, the example which performs centering of the sealing member 11 mainly by the cylindrical surface F1 formed in 10 A of 1st groove parts was shown. However, the configuration shown in FIG.
That is, the first groove portion 10A may be formed deep to some extent, and the inner peripheral surface of the seal member 11 may not contact the cylindrical surface F1. In this case, the position of the seal member 11 is mainly maintained by contact with the conical surface F2. The centering of the seal member 11 at the distal end side in the insertion direction of the valve housing 5 is configured to lock a part of the seal member 11 from the outside.
具体的には、シール部材11の挿入方向先端側の端面に、環状の突出部21を設けておく。この突出部21を、前記第1溝部10Aの挿入方向先端側に同じく環状に設けた係止部22によって外側から係止する。これにより、シール部材11は、バルブハウジング5と同軸心状に維持される。
尚、バルブハウジング5をシリンダヘッド2に挿入し、シール部材11が押し込まれた場合には、シール部材11の突起部は前記係止部22から離間する。しかし、このときには、既にシール部材11はカムカバー3等の内面に適切に当接しているから特段の不都合は生じない。
Specifically, an annular projecting portion 21 is provided on the end surface of the seal member 11 on the distal end side in the insertion direction. The protruding portion 21 is locked from the outside by a locking portion 22 that is also annularly provided on the distal end side in the insertion direction of the first groove portion 10A. Thereby, the seal member 11 is maintained coaxially with the valve housing 5.
When the valve housing 5 is inserted into the cylinder head 2 and the seal member 11 is pushed in, the protruding portion of the seal member 11 is separated from the locking portion 22. However, at this time, since the seal member 11 has already been properly in contact with the inner surface of the cam cover 3 or the like, no particular inconvenience occurs.
尚、本発明に係る電磁アクチュエータは、車両用エンジンの弁開閉時期制御装置の一部として用いる他に、車両の運転制御用に油圧制御を行う個所であれば、適宜用いることが可能である。 The electromagnetic actuator according to the present invention can be used as appropriate in addition to being used as a part of the valve opening / closing timing control device of the vehicle engine, as long as it is a place where hydraulic control is performed for vehicle operation control.
1 電磁アクチュエータ
5 バルブハウジング
6 バルブ本体
10A 第1溝部
10a 第2溝部
11 シール部材
100 凹部(空間)
B 流路形成体
F1 円筒面
F2 円錐面
K 開口部
R 媒体流路
X 軸心
DESCRIPTION OF SYMBOLS 1 Electromagnetic actuator 5 Valve housing 6 Valve main body 10A 1st groove part 10a 2nd groove part 11 Seal member 100 Recessed part (space)
B flow path forming body F1 cylindrical surface F2 conical surface K opening R medium flow path X axis
Claims (1)
前記開口部どうしの連通状態を切り替えるべく、前記バルブハウジングの内部において、当該バルブハウジングの軸心の方向に沿って摺動可能なバルブ本体を備えた電磁アクチュエータであって、
前記バルブハウジングを前記流路形成体に挿入したとき、前記流路形成体の一部に挿入方向奥側の端部が当接してその外周面が拡径変形し、前記バルブハウジングと前記流路形成体とに密着するシール部材を、前記バルブハウジングの外周面に備え、
前記シール部材を取り付けるよう、前記バルブハウジングの外周面に周方向に連続した環状の第1溝部を設けてあり、
当該第1溝部が、前記軸心と同軸心状の円筒面と、
前記バルブハウジングの挿入方向手前側ほど拡径した円錐面と、
前記円筒面および前記円錐面のうち少なくとも何れか一方に前記シール部材が変形したときに前記シール部材の一部が充填される空間として形成した周方向に連続する環状の第2溝部とを、前記バルブハウジングの挿入方向手前側から奥側に向けて、前記円錐面、前記第2溝部、前記円筒面の順に設けてある電磁アクチュエータ。 A substantially cylindrical valve housing that can be inserted and attached to a flow path forming body that forms a medium flow path, and has a plurality of openings communicating with the medium flow path;
An electromagnetic actuator comprising a valve body slidable along the axial center of the valve housing inside the valve housing to switch the communication state between the openings,
When the valve housing is inserted into the flow path forming body, an end on the back side in the insertion direction is in contact with a part of the flow path forming body, and an outer peripheral surface of the valve housing and the flow path are deformed. A seal member that is in close contact with the formed body is provided on the outer peripheral surface of the valve housing,
An annular first groove portion that is continuous in the circumferential direction is provided on the outer peripheral surface of the valve housing so as to attach the seal member,
The first groove portion has a cylindrical surface coaxial with the axial center,
A conical surface whose diameter increases toward the front side in the insertion direction of the valve housing;
A circumferentially continuous second groove formed as a space filled with a part of the seal member when the seal member is deformed on at least one of the cylindrical surface and the conical surface ; An electromagnetic actuator provided in the order of the conical surface, the second groove portion, and the cylindrical surface from the front side in the insertion direction of the valve housing toward the back side .
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JP7252246B2 (en) | 2018-09-10 | 2023-04-04 | イーグル工業株式会社 | Solenoid valve unit |
KR102177661B1 (en) * | 2019-04-15 | 2020-11-11 | 주식회사 삼현 | Check valve for pipes of semiconductor and display manufacturing device |
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JPS6154571U (en) * | 1984-08-30 | 1986-04-12 | ||
JPS62170468U (en) * | 1986-04-18 | 1987-10-29 | ||
JPH03199790A (en) * | 1989-04-17 | 1991-08-30 | Coltec Ind Inc | Pressure adjusting device |
JPH09210239A (en) * | 1996-02-05 | 1997-08-12 | Keehin:Kk | Grommet mounting structure in solenoid |
JP2000018418A (en) * | 1998-07-02 | 2000-01-18 | Nabco Ltd | Solenoid valve |
JP2004340324A (en) * | 2003-05-19 | 2004-12-02 | Hitachi Unisia Automotive Ltd | Solenoid valve |
JP2005282678A (en) * | 2004-03-29 | 2005-10-13 | Aisin Seiki Co Ltd | Electromagnetic actuator sealing structure |
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Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS6154571U (en) * | 1984-08-30 | 1986-04-12 | ||
JPS62170468U (en) * | 1986-04-18 | 1987-10-29 | ||
JPH03199790A (en) * | 1989-04-17 | 1991-08-30 | Coltec Ind Inc | Pressure adjusting device |
JPH09210239A (en) * | 1996-02-05 | 1997-08-12 | Keehin:Kk | Grommet mounting structure in solenoid |
JP2000018418A (en) * | 1998-07-02 | 2000-01-18 | Nabco Ltd | Solenoid valve |
JP2004340324A (en) * | 2003-05-19 | 2004-12-02 | Hitachi Unisia Automotive Ltd | Solenoid valve |
JP2005282678A (en) * | 2004-03-29 | 2005-10-13 | Aisin Seiki Co Ltd | Electromagnetic actuator sealing structure |
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