JP6065849B2 - Manufacturing method of oil control valve - Google Patents

Manufacturing method of oil control valve Download PDF

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JP6065849B2
JP6065849B2 JP2014001761A JP2014001761A JP6065849B2 JP 6065849 B2 JP6065849 B2 JP 6065849B2 JP 2014001761 A JP2014001761 A JP 2014001761A JP 2014001761 A JP2014001761 A JP 2014001761A JP 6065849 B2 JP6065849 B2 JP 6065849B2
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spring member
leaf spring
housing
diameter
check valve
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JP2015129564A (en
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中村　喜代治
喜代治 中村
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Toyota Motor Corp
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Description

本発明は、エンジンの可変動弁機構などに用いられるオイルコントロールバルブの製造方法に関し、特にオイルコントロールバルブのハウジング内にチェック弁を装着する方法に関する。   The present invention relates to a method for manufacturing an oil control valve used for a variable valve mechanism of an engine, and more particularly to a method for mounting a check valve in a housing of an oil control valve.

従来よりエンジンの可変動弁機構（Variable Valve Timing：以下、ＶＶＴと略称する）としては、エンジンオイルを作動油として、吸気バルブの動作タイミングを可変とするように動作する油圧式のものが広く用いられている。このようなＶＶＴに供給する油圧の制御には電磁駆動式のオイルコントロールバルブ（Oil Control Valve：以下、ＯＣＶと略称する）が用いられる。   2. Description of the Related Art Conventionally, as a variable valve timing mechanism (Variable Valve Timing: hereinafter abbreviated as VVT) of an engine, a hydraulic type that uses engine oil as hydraulic oil and operates so that the operation timing of the intake valve is variable has been widely used. It has been. An electromagnetically driven oil control valve (hereinafter abbreviated as OCV) is used for controlling the hydraulic pressure supplied to the VVT.

すなわち、ＯＣＶは、その進角側および遅角側の各吐出ポートからそれぞれＶＶＴの進角側および遅角側の各油圧室にオイルを供給して、吸気バルブの動作タイミングを進角させたり、反対に遅角させたりするものである。但し、オイルを供給する進角側または遅角側の油路の圧力が高いと逆方向の流れが生じることがあり、このことがＶＶＴの動作を不安定にするおそれがあった。   That is, the OCV supplies oil to the hydraulic chambers on the advance side and retard side of the VVT from the discharge ports on the advance side and the retard side, respectively, to advance the operation timing of the intake valve, On the other hand, it is retarded. However, if the pressure in the oil passage on the advance side or the retard side for supplying oil is high, a reverse flow may occur, which may make the operation of the VVT unstable.

この問題に対し、例えば特許文献１に開示されているように、ＯＣＶの進角側および遅角側の各吐出ポートにチェック弁を装着し、逆方向の流れを阻止するようにしたものがある。このものでは、帯状の薄い金属板からなる弁フィルタシートを、吐出ポートの開口を覆うようにＯＣＶのハウジングに外側から巻き付けて、リード弁タイプのチェック弁を構成している。   In order to solve this problem, for example, as disclosed in Patent Document 1, there is a valve in which check valves are attached to the discharge ports on the advance side and the retard side of the OCV to prevent reverse flow. . In this device, a reed valve type check valve is configured by winding a valve filter sheet made of a strip-like thin metal plate around the OCV housing from the outside so as to cover the opening of the discharge port.

そのようなチェック弁をＯＣＶのハウジングの内部に配設することも考えられ、この場合は、前記弁フィルタシートのような帯状の板ばね部材を巻回して、ハウジングにその端部の開口から挿入することになる。そして、このような作業の具体例として特許文献２には、エンジンの動弁系における油圧式ラッシュアジャスタのボディの空間内に逆止弁を装着する方法が記載されている。   It is conceivable to arrange such a check valve inside the housing of the OCV. In this case, a belt-like leaf spring member such as the valve filter seat is wound and inserted into the housing from the opening at its end. Will do. As a specific example of such work, Patent Document 2 describes a method of mounting a check valve in the space of the body of a hydraulic lash adjuster in an engine valve system.

この特許文献２に記載の油圧式ラッシュアジャスタにおいては、まず、帯状に成形した金属製または樹脂製の板ばね部材を巻回して、その装着状態よりも小径となるように縮径させる。そして、シリンダヘッドの上部に開口するボディの空間内に上方から挿入して、その内周面に開口する給油口を覆うように装着する。   In the hydraulic lash adjuster described in Patent Document 2, first, a metal or resin leaf spring member formed in a band shape is wound and reduced in diameter so as to have a smaller diameter than the mounted state. And it inserts in the space of the body opened to the upper part of a cylinder head from upper direction, and it mounts | wears so that the oil filler opening opened to the internal peripheral surface may be covered.

特開２００７−２３９９５１号公報JP 2007-239951 A ＷＯ２０１０／１４３２８４号公報WO2010 / 143284 publication

ところが、前記のようにチェック弁として用いる板ばね部材は、金属製であっても樹脂製であっても薄くて変形し易いものなので、これを巻回して縮径状態に保ちながら、あまり大きくはないハウジングの開口に挿入して装着する作業は、容易なものではない。   However, as described above, the leaf spring member used as a check valve is thin and easily deformed regardless of whether it is made of metal or resin. It is not easy to insert and install it in the opening of a housing that does not exist.

このため、作業中に誤って板ばね部材を縮径させ過ぎたり、無理にこじったりしてしまい、板ばね部材が材料の降伏点を超えて変形（塑性変形）するおそれがある。こうなると、巻回して装着した板ばね部材の一部に変形が残ってしまい、チェック弁としてポートを十分に密閉できなくなったり、ＯＣＶのスプールとの接触によって噛み込みなどの不具合を引き起こしたりするおそれがある。   For this reason, the leaf spring member may be excessively reduced in diameter or forcibly twisted during the operation, and the leaf spring member may be deformed beyond the yield point of the material (plastic deformation). If this happens, deformation may remain in a part of the leaf spring member that is wound and mounted, and the port may not be sufficiently sealed as a check valve, or may cause problems such as biting due to contact with the OCV spool. There is.

かかる点に鑑みて本発明の目的は、例えばＶＶＴの油圧制御などに用いられるＯＣＶの製造時に、チェック弁として用いる板ばね部材を、塑性変形を生じさせることなく容易にＯＣＶのハウジング内に挿入して装着できるようにすることである。   In view of this point, an object of the present invention is to easily insert a leaf spring member used as a check valve into a housing of an OCV without causing plastic deformation, for example, when manufacturing an OCV used for VVT hydraulic control or the like. It is to be able to wear it.

前記の目的を達成するために本発明は、板ばね部材を筒状に巻回してなるチェック弁を、オイルコントロールバルブのハウジングに、その端部の開口から挿入して装着するという製造方法が対象である。   In order to achieve the above object, the present invention is directed to a manufacturing method in which a check valve formed by winding a leaf spring member into a cylindrical shape is inserted into an oil control valve housing through an opening at an end thereof. It is.

そして、前記板ばね部材の巻回方向の一端部には係合片を突設する一方、他端側の所定部位には前記係合片を係止する係止部を設けておいて、まず、前記板ばね部材を巻回して前記係合片を係止部に係止させることにより、前記ハウジング内における装着状態よりも小径の縮径状態とする。この縮径状態の板ばね部材を前記ハウジングの端部の開口からその内部に挿入した後に、前記係合片の係止部による係止状態を解除して拡径させることにより、前記ハウジングの内周面に装着する。   An engagement piece projects from one end of the leaf spring member in the winding direction, and a locking portion for locking the engagement piece is provided at a predetermined portion on the other end side. By winding the leaf spring member and locking the engaging piece to the locking portion, the reduced diameter state is made smaller than the mounted state in the housing. After the leaf spring member in the reduced diameter state is inserted into the housing through the opening of the end portion of the housing, the engagement state by the engagement portion of the engagement piece is released and the diameter is increased, so that the inner diameter of the housing is increased. Attach to the circumference.

すなわち、チェック弁として用いる板ばね部材は一般的に、金属製または樹脂製で所要の弾性を有する薄板材を帯状に成形して、ＯＣＶのハウジング内に装着された状態よりも大径の筒状に巻回する。この板ばね部材を前記のように縮径させてハウジング内に挿入し、装着位置において拡径させれば、それ自体の弾発力によってハウジングの内周面に密着するようになり、そこに開口するポートを覆うように装着できる。   That is, the leaf spring member used as the check valve is generally a metal or resin-made thin plate material having a required elasticity and formed into a strip shape, and has a cylindrical shape larger in diameter than a state in which it is mounted in the OCV housing. Wind around. If this leaf spring member is reduced in diameter as described above, inserted into the housing, and expanded in the mounting position, it will come into close contact with the inner peripheral surface of the housing by its own elastic force, and will open there. It can be installed so as to cover the port.

そして、前記の方法によれば、係合片を係止部によって係止することで、板ばね部材を適度な縮径状態に保持することができるので、この板ばね部材を容易にハウジング内に挿入し、装着することが可能になる。仮に板ばね部材にさらに縮径するような力が加わったとしても、係合片が係止部によって係止されていることで、板ばね部材のさらなる縮径は抑制できる。しかも、挿入作業が容易になることから、板ばね部材をこじったり、誤って無理な力を加えてしまうこと自体が少なくなる。   And according to the said method, since a leaf | plate spring member can be hold | maintained in an appropriate diameter-reduced state by latching an engaging piece with a latching | locking part, this leaf | plate spring member can be easily accommodated in a housing. It can be inserted and installed. Even if a force to further reduce the diameter is applied to the leaf spring member, further reduction in the diameter of the leaf spring member can be suppressed because the engagement piece is locked by the locking portion. In addition, since the insertion work is facilitated, it is less likely that the leaf spring member is twisted or an unreasonable force is applied by mistake.

好ましいのは前記係合片を、板ばね部材の一端部から外方に延びるとともに、その巻回方向について内側に延びるように設けることであり、これを係止する係止部は、前記係止片の挿入可能なスリットによって構成すればよい。こうすれば、前記係止片をスリットに挿入して係止することで、板ばね部材がそれ以上、縮径しないように保持しながら、必要に応じて容易に係止状態を解除することができる。   Preferably, the engaging piece is provided so as to extend outward from one end of the leaf spring member and extend inward in the winding direction. What is necessary is just to comprise by the slit which can insert a piece. In this way, by inserting the locking piece into the slit and locking it, it is possible to easily release the locked state as needed while holding the leaf spring member so that it does not shrink any further. it can.

また、上述のように縮径状態とした板ばね部材をハウジングの端部の開口からその内部に挿入する際には、前記縮径状態の板ばね部材よりも大径のガイド筒を前記ハウジングの開口に挿入し、その先端部を前記板ばね部材の装着位置の手前に位置付ける。そして、このガイド筒の内周面を滑らせるようにして、前記板ばね部材をハウジング内の装着位置まで挿入すればよい。こうすれば、仮に途中で係止状態が解除されてしまっても、板ばね部材を塑性変形させることなく装着位置まで挿入できる。   Further, when the leaf spring member having a reduced diameter as described above is inserted into the inside through the opening at the end of the housing, a guide cylinder having a larger diameter than the leaf spring member in the reduced diameter state is inserted into the housing. It inserts in opening, and positions the front-end | tip part before the mounting position of the said leaf | plate spring member. Then, the leaf spring member may be inserted to the mounting position in the housing so as to slide on the inner peripheral surface of the guide tube. In this way, even if the locked state is released halfway, the leaf spring member can be inserted to the mounting position without plastic deformation.

本発明に係るオイルコントロールバルブの製造方法によれば、チェック弁として用いる板ばね部材を巻回し、その係合片を係止部により係止することによって適度な縮径状態に保持することができるので、この板ばね部材を容易にハウジング内に挿入することができる。これにより、挿入する途中で板ばね部材が過度に縮径されたり、こじられたりして塑性変形してしまい、チェック弁としての機能が損なわれることを防止できる。   According to the method of manufacturing an oil control valve according to the present invention, a leaf spring member used as a check valve is wound, and the engagement piece is locked by the locking portion, so that it can be maintained in an appropriately reduced diameter state. Therefore, this leaf spring member can be easily inserted into the housing. As a result, it is possible to prevent the leaf spring member from being excessively reduced in diameter during the insertion or to be plastically deformed by being deformed, thereby impairing the function as a check valve.

本発明の実施の形態に係るオイルコントロールバルブ（ＯＣＶ）の一例を示す概略構成図である。It is a schematic structure figure showing an example of an oil control valve (OCV) concerning an embodiment of the invention. ＯＣＶのハウジング内にチェック弁として装着する板ばね部材の斜視図である。It is a perspective view of the leaf | plate spring member with which it installs as a check valve in the housing of OCV. 板ばね部材をＯＣＶのハウジングにその端部の開口から挿入する作業を示した斜視図である。It is the perspective view which showed the operation | work which inserts a leaf | plate spring member into the housing of OCV from the opening of the edge part. 板ばね部材をチェック弁の装着位置まで挿入する作業の説明図である。It is explanatory drawing of the operation | work which inserts a leaf | plate spring member to the mounting position of a check valve. 板ばね部材を挿入する際に内径ガイドを用いる他の実施形態に係る図４相当図である。FIG. 5 is a view corresponding to FIG. 4 according to another embodiment in which an inner diameter guide is used when a leaf spring member is inserted.

以下、本発明の実施の形態を図面に基づいて説明する。本実施形態ではエンジンの動弁系に装備された可変動弁機構（ＶＶＴ）のオイルコントロールバルブ（Oil Control Valve：以下、ＯＣＶという）に本発明を適用した場合について説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, a case will be described in which the present invention is applied to an oil control valve (Oil Control Valve: hereinafter referred to as OCV) of a variable valve mechanism (VVT) equipped in a valve system of an engine.

−ＯＣＶの概略構成−
図１に示すようにＯＣＶ１は、一例として５ポートのスプール弁であって、一端（図の左端）が開口する円筒状のハウジング２内に、その長手方向の軸線Ｘに沿って往復動するようにスプール３を収容したものである。このスプール３を電磁ソレノイド４によって駆動し位置を変更することによって、ＯＣＶ１からＶＶＴ（図示せず）の進角側または遅角側の油圧室へ向かうように、油圧回路５を介してエンジンオイル（以下、単にオイルという）を供給することができる。 -Schematic configuration of OCV-
As shown in FIG. 1, the OCV 1 is a five-port spool valve as an example, and reciprocates along a longitudinal axis X in a cylindrical housing 2 having one end (left end in the figure) opened. In which the spool 3 is accommodated. By driving the spool 3 with an electromagnetic solenoid 4 and changing the position, the engine oil (through the hydraulic circuit 5 is directed from the OCV 1 to the hydraulic chamber on the advance side or retard side of the VVT (not shown). Hereinafter, it is simply referred to as oil).

すなわち、前記ハウジング２にはその軸線Ｘの方向に延びるスプール３の収容室２０が形成され、この収容室２０に臨むハウジング２の内周面には、長手方向である軸線Ｘ方向の一側（図の左側）から順番に、幅広の浅溝からなる３つの円環状のリセス２０ａ〜２０ｃが形成されている。そして、これらのリセス２０ａ〜２０ｃのそれぞれの溝底面には、進角側ポート２１，２２、供給ポート２３、および遅角側ポート２４，２５が開口している。   That is, the housing 2 is formed with a storage chamber 20 of the spool 3 extending in the direction of the axis X, and the inner peripheral surface of the housing 2 facing the storage chamber 20 is on one side (in the direction of the axis X) which is the longitudinal direction ( In order from the left side of the figure, three annular recesses 20a to 20c made of wide shallow grooves are formed. The advance side ports 21 and 22, the supply port 23, and the retard side ports 24 and 25 are opened on the bottom surfaces of the grooves of the recesses 20 a to 20 c.

前記進角側ポート２１，２２および遅角側ポート２４，２５は、それぞれ進角側油路５ａおよび遅角側油路５ｂによってＶＶＴの進角側および遅角側の油圧室に連通されており、これら各油圧室との間でオイルの供給または排出が行われる。一方、供給ポート２３は、供給油路５ｃによって図示しないオイルポンプの吐出口に連通されており、このオイルポンプによって汲み上げられたオイルが供給される。   The advance angle ports 21, 22 and the retard angle ports 24, 25 are communicated with the advance side and the retard angle side hydraulic chambers of the VVT by the advance side oil passage 5a and the retard side oil passage 5b, respectively. The oil is supplied to or discharged from each of the hydraulic chambers. On the other hand, the supply port 23 communicates with a discharge port of an oil pump (not shown) through a supply oil passage 5c, and the oil pumped up by the oil pump is supplied.

なお、図示は省略するが、スプール３の内部には軸線Ｘ方向に延びる油路が形成されるとともに、所定部位でスプール３の外周に開口している。この開口がリセス２０ａ，２０ｃに連通すると、前記のように進角側ポート２１，２２や遅角側ポート２４，２５に排出されてきたオイルが、ハウジング２の他端部に形成されたドレンポート２６からドレンされることになる。   Although not shown, an oil passage extending in the direction of the axis X is formed inside the spool 3 and opens to the outer periphery of the spool 3 at a predetermined portion. When this opening communicates with the recesses 20a and 20c, the drain port formed at the other end of the housing 2 is discharged from the advance ports 21 and 22 and the retard ports 24 and 25 as described above. 26 will be drained.

また、ＯＣＶ１は、図示しないエンジンのＥＣＵ（Electronic Control Unit）から印加される電流に応じて電磁ソレノイド４の発生する電磁力が変化し、この電磁力とコイルばね６のばね力との釣り合いによってスプール３の位置が決定される。そして、このスプール３の位置に応じて、進角側ポート２１，２２や遅角側ポート２４，２５と供給ポート２３との連通量（例えば、連通部分の流路断面積）が変化する。   Further, the OCV 1 changes the electromagnetic force generated by the electromagnetic solenoid 4 according to the current applied from an ECU (Electronic Control Unit) of the engine (not shown), and the spool is generated by the balance between the electromagnetic force and the spring force of the coil spring 6. The position of 3 is determined. Then, according to the position of the spool 3, the communication amount between the advance port 21 and 22 or the retard port 24 and 25 and the supply port 23 (for example, the flow path cross-sectional area of the communication portion) changes.

これにより、進角側ポート２１，２２から進角側の油路５ａに対して吐出されるオイルの流量が変化し、或いは、遅角側ポート２４，２５から遅角側の油路５ｂに対して吐出されるオイルの流量が変化する。このようなオイルの流量の変化によってＯＣＶ１は、ＶＶＴを進角側または遅角側に動作させて、エンジンの吸気バルブの動作タイミングを進角側または遅角側に変更することができる。   As a result, the flow rate of oil discharged from the advance side ports 21 and 22 to the advance side oil passage 5a changes, or from the retard side ports 24 and 25 to the retard side oil passage 5b. The flow rate of the discharged oil changes. The OCV 1 can change the operation timing of the intake valve of the engine to the advance side or the retard side by operating the VVT to the advance side or the retard side by such a change in the oil flow rate.

−チェック弁−
前記の如くＯＣＶ１は、エンジンの吸気バルブの動作タイミングを変更するために進角側ポート２１，２２または遅角側ポート２４，２５から進角側または遅角側の油路５ａ，５ｂに対してオイルを吐出するものであるが、この際、それらの油路５ａ，５ｂの圧力が高いと逆方向の流れが生じることがあり、このことがＶＶＴの動作を不安定にするおそれがあった。 -Check valve-
As described above, the OCV 1 changes from the advance side ports 21, 22 or the retard side ports 24, 25 to the advance side or retard side oil passages 5a, 5b in order to change the operation timing of the intake valve of the engine. In this case, oil is discharged. At this time, if the pressure in the oil passages 5a and 5b is high, a reverse flow may occur, which may cause the operation of the VVT to become unstable.

そこで、本実施形態では、ＯＣＶ１のハウジング２に形成された供給ポート２３にリード弁タイプのチェック弁７（以下、巻チェック弁７という）を装着して、オイルの逆流を阻止するようにしている。すなわち、図１に表れているように、供給ポート２３の収容室２０に臨む開口を覆うようにして、ハウジング２のリセス２０ｂの内周面に巻チェック弁７が配設されている。   Therefore, in the present embodiment, a reed valve type check valve 7 (hereinafter referred to as a winding check valve 7) is attached to the supply port 23 formed in the housing 2 of the OCV 1 so as to prevent back flow of oil. . That is, as shown in FIG. 1, the winding check valve 7 is disposed on the inner peripheral surface of the recess 20 b of the housing 2 so as to cover the opening of the supply port 23 facing the accommodation chamber 20.

この巻チェック弁７は、薄い帯状に成形された鋼製の板ばね部材７０からなり、図２の上段に一例を示すように、この板ばね部材７０を筒状に巻回して、前記のようにハウジング２のリセス２０ｂの内周面に装着した状態よりも大径になるように湾曲させたものである。この板ばね部材７０を縮径させて、前記リセス２０ｂの内周面に装着すれば、それ自体の弾発力によって板ばね部材７０がリセス２０ｂの内周面に密着し、供給ポート２３の開口を覆う巻チェック弁７となる。   The winding check valve 7 is made of a steel leaf spring member 70 formed into a thin strip shape, and as shown in the upper part of FIG. 2, the leaf spring member 70 is wound into a tubular shape as described above. Are curved so as to have a larger diameter than the state of being mounted on the inner peripheral surface of the recess 20b of the housing 2. When the leaf spring member 70 is reduced in diameter and attached to the inner peripheral surface of the recess 20b, the leaf spring member 70 is brought into close contact with the inner peripheral surface of the recess 20b by its own elastic force, and the supply port 23 is opened. It becomes the winding check valve 7 covering the.

そして、オイルポンプから吐出されたオイルが供給油路５ｃによって供給ポート２３に供給されてくると、その油圧によって押し上げられて板ばね部材７０、即ち巻チェック弁７が開弁し、オイルがハウジング２の収容室２０内に流入するようになる。また、そのようなオイルの流れに逆向きの流れが生じようとすれば、巻チェック弁７はその弾発力によって再びリセス２０ｂの内周面に密着し、供給ポート２３の開口を閉ざす。   When the oil discharged from the oil pump is supplied to the supply port 23 through the supply oil passage 5c, the leaf spring member 70, that is, the winding check valve 7 is opened by the hydraulic pressure, and the oil is supplied to the housing 2 Into the storage chamber 20. Further, if a reverse flow of such oil flow is to occur, the winding check valve 7 is brought into close contact with the inner peripheral surface of the recess 20b by its elastic force, and the opening of the supply port 23 is closed.

−ＯＣＶハウジングへのチェック弁の装着−
ところで、前記の巻チェック弁７をハウジング２内に装着するためには、前記のように巻回した板ばね部材７０をさらに縮径させて、ハウジング２の一端の開口部２ａに挿入することになる。しかし、板ばね部材７０は薄くて変形し易いものなので、これを弾発力に抗して縮径させた状態に保持しながら、あまり大きくはないハウジング２の開口部２ａに挿入するのは容易ではない。 -Attaching the check valve to the OCV housing-
By the way, in order to mount the winding check valve 7 in the housing 2, the leaf spring member 70 wound as described above is further reduced in diameter and inserted into the opening 2 a at one end of the housing 2. Become. However, since the leaf spring member 70 is thin and easily deformed, it is easy to insert the leaf spring member 70 into the opening 2a of the housing 2 which is not so large while maintaining the reduced diameter against the elastic force. is not.

このため、作業中に誤って板ばね部材７０を縮径させ過ぎたり、無理にこじったりしてしまい、板ばね部材７０が材料の降伏点を超えて変形（塑性変形）するおそれがある。こうなると、前記のように装着した巻チェック弁７の一部に変形が残ってしまい、供給ポート２３を十分に密閉できなくなったり、スプール３との接触によって噛み込みなどの不具合を引き起こしたりするおそれがある。   For this reason, the leaf spring member 70 may be excessively reduced in diameter or forcibly twisted during operation, and the leaf spring member 70 may be deformed beyond the yield point of the material (plastic deformation). In this case, a part of the winding check valve 7 mounted as described above remains deformed, and the supply port 23 may not be sufficiently sealed, or a malfunction such as biting may occur due to contact with the spool 3. There is.

そこで、本実施形態では前記図２に表れているように、帯状の板ばね部材７０の長手方向（巻回方向）の一端部に係合片７１を設ける一方、他端側の所定部位には前記係合片７１を挿入して係止させることのできるスリット７２（係止部）を設けている。前記係合片７１は、板ばね部材７０の一端縁における幅方向の中間部から外方に延びる矩形片であり、少しだけ巻回方向の内側に折り曲げられて延びている。   Therefore, in the present embodiment, as shown in FIG. 2, the engagement piece 71 is provided at one end in the longitudinal direction (winding direction) of the strip-shaped leaf spring member 70, while the predetermined portion on the other end side A slit 72 (locking portion) is provided through which the engaging piece 71 can be inserted and locked. The engagement piece 71 is a rectangular piece extending outward from the intermediate portion in the width direction at one end edge of the leaf spring member 70, and is bent slightly inward in the winding direction.

そして、図２に矢印で示すように板ばね部材７０を巻回して、その他端側に外周側から一端部を重ね合わせるとともに、その一端縁から外方の斜め内向きに延びる前記係合片７１を、板ばね部材７０の他端側のスリット７２に挿入する。こうすると、板ばね部材７０の一端縁における幅方向の両端部がスリット７２の周縁部に当接して、板ばね部材７０のそれ以上の縮径が阻止される。   Then, the leaf spring member 70 is wound as shown by an arrow in FIG. 2, and one end portion is overlapped on the other end side from the outer peripheral side, and the engagement piece 71 extends obliquely inward outward from the one end edge. Is inserted into the slit 72 on the other end side of the leaf spring member 70. If it carries out like this, the both ends of the width direction in the one end edge of the leaf | plate spring member 70 will contact | abut to the peripheral part of the slit 72, and the further diameter reduction of the leaf | plate spring member 70 will be blocked | prevented.

また、そのように縮径された板ばね部材７０は弾発力によって拡径しようとするため、その一端側の部分には、他端側におけるスリット７２よりも先端側の部分が内周側から押し付けられるとともに、スリット７２を通過した係合片７１の先端部はスリット７２の周縁部に内周側から押し付けられる。つまり、係合片７１がスリット７２に引っ掛かって係止されるようになるが、この係止状態は、例えば板ばね部材７０に適当な向きの力を加えることによって容易に解除することができる。   In addition, since the leaf spring member 70 that has been reduced in diameter tends to expand its diameter by elastic force, a portion on the tip side of the slit 72 on the other end side is located on the inner peripheral side. While being pressed, the tip of the engagement piece 71 that has passed through the slit 72 is pressed against the peripheral edge of the slit 72 from the inner peripheral side. That is, the engaging piece 71 is caught by the slit 72 and is locked, but this locked state can be easily released by applying a force in an appropriate direction to the leaf spring member 70, for example.

ここで、前記板ばね部材７０の他端側におけるスリット７２の位置は、前記のように板ばね部材７０を巻回して一端部の係合片７１を挿入した状態で、この板ばね部材７０が適度な縮径状態になるように設定されている。この適度な縮径状態とは、巻回された板ばね部材７０がハウジング２の開口部２ａを無理なく通過可能であり、且つ、湾曲し過ぎて塑性変形を生じることのない状態である。前記のように係合片７１をスリット７２によって係止することで、板ばね部材７０は適度な縮径状態に保持される。   Here, the position of the slit 72 on the other end side of the leaf spring member 70 is such that the leaf spring member 70 is wound in the state where the leaf spring member 70 is wound and the engagement piece 71 at one end is inserted as described above. It is set so as to be in an appropriately reduced diameter state. The moderately reduced diameter state is a state in which the wound leaf spring member 70 can pass through the opening 2a of the housing 2 without difficulty and is not curved so that plastic deformation does not occur. By locking the engagement piece 71 with the slit 72 as described above, the leaf spring member 70 is held in an appropriately reduced diameter state.

こうして適度な縮径状態に保持した板ばね部材７０をＯＣＶ１のハウジング２の一端の開口部２ａからその内部に挿入する。このときには、図３、４に一例を示すように、前記適度な縮径状態とした板ばね部材７０よりも内径が大きく、且つ前記ハウジング２の開口部２ａよりも外形の小さなガイド筒８を使用する。図示のガイド筒８は例えば樹脂製であって、円筒状の本体部の一端部にはラッパ状の拡径部８ａが設けられている。   In this way, the leaf spring member 70 held in an appropriately reduced diameter state is inserted into the opening 2a at one end of the housing 2 of the OCV 1 into the inside thereof. At this time, as shown in FIGS. 3 and 4, a guide cylinder 8 having an inner diameter larger than that of the leaf spring member 70 in the moderately reduced diameter state and smaller in outer diameter than the opening 2 a of the housing 2 is used. To do. The illustrated guide tube 8 is made of, for example, resin, and a trumpet-shaped enlarged diameter portion 8a is provided at one end of the cylindrical main body.

このガイド筒８を、図示のように他端側からハウジング２の開口部２ａに挿入し、軸線Ｘ方向に挿し入れたガイド筒８の他端部（先端部）を、図４に示すようにハウジング２内周のリセス２０ｂの手前に位置付ける。そして、図３に示すようにガイド筒８の内部にその拡径部８ａから前記板ばね部材７０を挿入し、図４に示すようにガイド筒８の内周面を滑らせてハウジング２内に押し入れる。   As shown in FIG. 4, the guide tube 8 is inserted into the opening 2a of the housing 2 from the other end side as shown in the figure, and the other end portion (tip portion) of the guide tube 8 inserted in the direction of the axis X is shown in FIG. It is positioned in front of the recess 20b on the inner periphery of the housing 2. Then, as shown in FIG. 3, the leaf spring member 70 is inserted into the guide tube 8 from the enlarged diameter portion 8a, and the inner peripheral surface of the guide tube 8 is slid into the housing 2 as shown in FIG. Push in.

この際、図示はしないが、例えば棒状の冶具などによって板ばね部材７０を押してゆけばよく、こうして押し入れられた板ばね部材７０がガイド筒８の他端部から押し出されて、巻チェック弁７の装着位置であるリセス２０ｂ内に到達する。また、仮に、ガイド筒８内で係合片７１のスリット７２による係止状態が解除されてしまっても、板ばね部材７０をリセス２０ｂまで押し入れることができる。   At this time, although not shown in the figure, the leaf spring member 70 may be pushed by, for example, a rod-shaped jig or the like, and the pushed leaf spring member 70 is pushed out from the other end portion of the guide cylinder 8 and the winding check valve 7 It reaches into the recess 20b which is the mounting position. Even if the engagement state of the engagement piece 71 by the slit 72 is released in the guide cylinder 8, the leaf spring member 70 can be pushed into the recess 20b.

そして、リセス２０内に到達した板ばね部材７０を、例えば前記棒状の冶具などによって軽く押圧し、スリット７２から係合片７１を離脱させる（係止状態を解除する）と、板ばね部材７０はそれ自体の弾発力によって拡径し、リセス２０ｂの内周面に張り付くようになる。また、ガイド筒８から押し出された後に自然にスリット７２から係合片７１が離脱することもあるが、この場合も板ばね部材７０は拡径し、リセス２０ｂの内周面に張り付くようになる。つまり、板ばね部材７０、即ち巻チェック弁７がハウジング２内の所定の位置に装着される。   Then, when the leaf spring member 70 that has reached the recess 20 is lightly pressed by, for example, the rod-shaped jig or the like, and the engagement piece 71 is released from the slit 72 (releases the locking state), the leaf spring member 70 is The diameter is expanded by its own elastic force, and it sticks to the inner peripheral surface of the recess 20b. In addition, the engagement piece 71 may be naturally detached from the slit 72 after being pushed out from the guide cylinder 8, but in this case also, the leaf spring member 70 expands in diameter and sticks to the inner peripheral surface of the recess 20b. . That is, the leaf spring member 70, that is, the winding check valve 7 is mounted at a predetermined position in the housing 2.

以上、説明したように本実施形態に係るＯＣＶ１の製造方法によると、塑性変形を生じることのない適度の縮径状態に保って、板ばね部材７０を容易にハウジング２内に挿入することができる。挿入する際に仮に板ばね部材７０をさらに縮径させるような力が加わったとしても、係合片７１がスリット７２に係止されているので、板ばね部材７０のさらなる縮径は抑制される。しかも、挿入作業が容易になることから、板ばね部材７０をこじったり、誤って無理な力を加えてしまうこと自体が少なくなる。   As described above, according to the manufacturing method of the OCV 1 according to the present embodiment, the leaf spring member 70 can be easily inserted into the housing 2 while maintaining an appropriate reduced diameter state without causing plastic deformation. . Even if a force that further reduces the diameter of the leaf spring member 70 is applied during insertion, the engagement piece 71 is locked to the slit 72, so that further reduction in the diameter of the leaf spring member 70 is suppressed. . In addition, since the insertion work is facilitated, it is less likely that the leaf spring member 70 is twisted or an unreasonable force is applied by mistake.

よって、ハウジング２内に挿入する途中で板ばね部材７０が過度に縮径されたり、こじられたりして材料の降伏点を超えて塑性変形してしまい、巻チェック弁７として供給ポート２３を十分に密閉できなくなったり、或いはスプール３との接触によって噛み込みなどの不具合を引き起こしたりすることが防止される。つまり、本実施形態によれば、板ばね部材７０をハウジング２内に装着する際に、巻チェック弁７としての機能が損なわれることを防止できる。   Therefore, the leaf spring member 70 is excessively reduced in diameter or twisted during insertion into the housing 2 and plastically deforms beyond the yield point of the material, and the supply port 23 is sufficiently used as the winding check valve 7. It is possible to prevent the occurrence of problems such as biting due to contact with the spool 3. That is, according to the present embodiment, it is possible to prevent the function as the winding check valve 7 from being impaired when the leaf spring member 70 is mounted in the housing 2.

−他の実施形態−
本発明は、前記の実施形態の記載に限定されるものではない。前記実施形態の記載は、あくまで例示に過ぎず、本発明の構成や用途などについても限定しない。すなわち、前記実施形態では、板ばね部材７０の長手方向の一端部に係合片７１を形成し、これを係止部であるスリット７２に挿入するようにしているが、これに限ることはなく、例えばＬ字状の係合片を、同様にＬ字状に形成した係止部のよって係止させるようにしてもよい。 -Other embodiments-
The present invention is not limited to the description of the above embodiment. The description of the embodiment is merely an example, and the configuration and application of the present invention are not limited. That is, in the above-described embodiment, the engagement piece 71 is formed at one end portion in the longitudinal direction of the leaf spring member 70, and this is inserted into the slit 72 that is the locking portion. However, the present invention is not limited to this. For example, an L-shaped engagement piece may be locked by a locking portion similarly formed in an L shape.

また、前記のように係合片７１を係止部（スリット７２）によって係止することによって適度の縮径状態に保持するだけでなく、板ばね部材７０のさらなる縮径をより確実に阻止するために、内側にガイド棒を設置することもできる。すなわち、図５に示すように、ハウジング２内に挿入したガイド筒８の内側に所定の間隔を空けて円柱状のガイド棒９を設置し、ガイド筒８との間の円環状の隙間を通過させて板ばね部材７０を挿入するようにしてもよい。   Further, as described above, the engagement piece 71 is locked by the locking portion (slit 72), so that not only the diameter of the leaf spring member 70 is further reduced but also more reliably prevented. Therefore, a guide rod can be installed on the inside. That is, as shown in FIG. 5, a cylindrical guide rod 9 is installed inside the guide cylinder 8 inserted into the housing 2 at a predetermined interval and passes through an annular gap between the guide cylinder 8. In this case, the leaf spring member 70 may be inserted.

こうすれば、前記実施形態のようにガイド筒８の内周面を滑らせるようにして板ばね部材７０を押してゆく途中で、仮に係合片７１のスリット７２による係止状態が解除されてしまい、その上さらに板ばね部材７０に縮径させるような力が加わったとしても、この板ばね部材７０の過度の縮径はガイド棒９によって阻止することができる。   By doing so, the state of the engagement of the engagement piece 71 by the slit 72 is temporarily released while the leaf spring member 70 is being pushed in such a way as to slide the inner peripheral surface of the guide tube 8 as in the above embodiment. In addition, even if a force for reducing the diameter of the leaf spring member 70 is applied, excessive reduction of the diameter of the leaf spring member 70 can be prevented by the guide rod 9.

さらに、そのようなガイド棒９を使用するのであれば、前記実施形態のように板ばね部材７０に係合片７１や係止部（スリット７２）を設ける必要もなく、単に縮径させた板ばね部材を、ガイド筒８とガイド棒９との間の隙間を通過させて挿入することも考えられる。但し、ガイド筒８とガイド棒９との間の隙間は狭いので、ここを通過させて薄い板ばね部材７０を押してゆくのは容易ではなく、前記実施形態のようにする方が作業が容易なものになる。   Further, if such a guide rod 9 is used, it is not necessary to provide the engagement piece 71 or the locking portion (slit 72) in the leaf spring member 70 as in the above-described embodiment, and the plate is simply reduced in diameter. It is also conceivable to insert the spring member through the gap between the guide tube 8 and the guide rod 9. However, since the gap between the guide cylinder 8 and the guide rod 9 is narrow, it is not easy to push the thin leaf spring member 70 through the gap, and it is easier to work as in the above embodiment. Become a thing.

さらにまた前記実施形態は、エンジンのＶＶＴの油圧制御に用いるＯＣＶ１について説明したが、本発明は、それ以外の種々のオイルコントロールバルブ、例えばオイルポンプの容量制御に用いるものにも適用可能であり、また、エンジン以外の例えばトランスミッションなどに用いられるオイルコントロールバルブにも適用可能である。   Furthermore, although the said embodiment demonstrated OCV1 used for the hydraulic control of engine VVT, this invention is applicable also to what is used for the capacity | capacitance control of other various oil control valves, for example, an oil pump, Moreover, it is applicable also to the oil control valve used for transmissions other than an engine, for example.

本発明は、エンジンなどに装備されるオイルコントロールバルブの製造時に、チェック弁として用いる板ばね部材を、塑性変形を生じさせることなく容易にハウジングの内部に挿入し装着できるので、例えば量産エンジンなどに適用して効果が高い。   In the present invention, when manufacturing an oil control valve equipped in an engine or the like, a leaf spring member used as a check valve can be easily inserted and installed in the housing without causing plastic deformation, so that it can be applied to, for example, a mass production engine. It is highly effective when applied.

１ オイルコントロールバルブ（ＯＣＶ）
２ ＯＣＶのハウジング
２ａ ハウジングの一端の開口部
２０ スプールの収容室
２０ｂ リセス（チェック弁の装着されるハウジングの内周面）
３ スプール
４ 電磁ソレノイド
７ チェック弁
７０ 板ばね部材
７１ 係合片
７２ スリット（係止部） 1 Oil control valve (OCV)
2 OCV housing 2a Opening at one end of housing 20 Spool storage chamber 20b Recess (inner peripheral surface of housing to which check valve is mounted)
3 Spool 4 Electromagnetic solenoid 7 Check valve 70 Leaf spring member 71 Engagement piece 72 Slit (locking part)

Claims (1)

板ばね部材を筒状に巻回してなるチェック弁を、オイルコントロールバルブのハウジングにその端部の開口から挿入して装着するオイルコントロールバルブの製造方法であって、
前記板ばね部材の巻回方向の一端部には係合片が突設される一方、他端側の所定部位には前記係合片を係止する係止部が設けられており、
前記板ばね部材を巻回して前記係合片を係止部に係止させることにより、前記ハウジング内における装着状態よりも小径の縮径状態とし、
この縮径状態の板ばね部材を前記ハウジングの端部の開口からその内部に挿入した後に、前記係合片の係止部による係止状態を解除して拡径させることにより、前記ハウジングの内周面に装着することを特徴とするオイルコントロールバルブの製造方法。 A check valve formed by winding a leaf spring member into a cylindrical shape is a method for manufacturing an oil control valve in which a check valve is inserted into an oil control valve housing through an opening at its end,
An engagement piece projects from one end of the leaf spring member in the winding direction, and a locking portion for locking the engagement piece is provided at a predetermined portion on the other end side.
By winding the leaf spring member and locking the engaging piece to the locking portion, the reduced diameter state is smaller than the mounted state in the housing,
After the leaf spring member in the reduced diameter state is inserted into the housing through the opening of the end portion of the housing, the engagement state by the engagement portion of the engagement piece is released and the diameter is increased, so that the inner diameter of the housing is increased. An oil control valve manufacturing method characterized by being mounted on a peripheral surface.
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