JP7359674B2

JP7359674B2 - motor valve

Info

Publication number: JP7359674B2
Application number: JP2019222390A
Authority: JP
Inventors: 邦夫片岡
Original assignee: Rinnai Corp
Current assignee: Rinnai Corp
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2023-10-11
Anticipated expiration: 2039-12-09
Also published as: JP2021092254A

Description

本発明は、主としてガス器具のバーナに対するガス供給路に介設するモータ弁に関する。 The present invention mainly relates to a motor valve installed in a gas supply path to a burner of a gas appliance.

従来、この種のモータ弁として、流入口と、流出口と、流入口と流出口との一方に連通する弁室と、弁室の一端の弁座と、弁座に形成され流入口と流出口との他方に連通する弁孔とを有する弁筐と、弁座に着座して弁孔を閉塞する閉弁位置に弁バネで付勢される弁体と、弁体の軸部が摺動自在に内挿されるガイド筒部を有すると共に、弁体の軸部に固定したアーマチュアに対向する電磁石を取付けた可動体と、モータと、モータの回転により弁体の開閉方向たるＸ軸方向に可動体を進退させる連動機構とを備え、可動体を弁体に向けてＸ軸方向一方に前進させることにより、電磁石をアーマチュアに当接させ、アーマチュアを電磁石に吸着させた状態で可動体をＸ軸方向他方に後退させることにより、弁体を開動作させるものが知られている（例えば、特許文献１参照）。このもので、連動機構は、一般的に、モータの出力軸上の雄ねじと、雄ねじに螺合する直動体とから成る送りねじ機構で構成され、弁筐内で直動体に可動体を連結している。 Conventionally, this type of motor valve has an inlet, an outlet, a valve chamber that communicates with one of the inlet and the outlet, a valve seat at one end of the valve chamber, and a valve seat formed on the valve seat that communicates with the inlet and the outlet. A valve housing having a valve hole that communicates with the outlet on the other side, a valve body that seats on the valve seat and is urged by a valve spring to a closed position where the valve hole is closed, and a shaft portion of the valve body that slides. A movable body that has a guide tube that can be inserted freely and has an electromagnet that faces an armature fixed to the shaft of the valve body, a motor, and is movable in the X-axis direction, which is the opening and closing direction of the valve body, by the rotation of the motor. By moving the movable body forward in one direction in the X-axis direction toward the valve body, the electromagnet is brought into contact with the armature, and with the armature attracted to the electromagnet, the movable body is moved along the X-axis. It is known that a valve body is opened by moving it backward in the other direction (for example, see Patent Document 1). The interlocking mechanism generally consists of a feed screw mechanism consisting of a male thread on the output shaft of the motor and a linear motion body that is threaded onto the male screw, and the movable body is connected to the linear motion body within the valve housing. ing.

ところで、モータが故障してモータの交換を行う場合、従来は、可動体を弁筐の外部に取り出して、直動体から可動体を分離することが必要になる。ここで、可動体を弁筐の外部に取り出す場合は、可動体に異物が付着したり傷が付かないように慎重に作業を行う必要があり、モータ交換の作業性が悪くなる。 By the way, when the motor breaks down and the motor is replaced, conventionally it is necessary to take the movable body out of the valve housing and separate the movable body from the linear motion body. Here, when the movable body is taken out of the valve casing, it is necessary to perform the work carefully to prevent foreign matter from adhering to the movable body or damaging it, which impairs the workability of replacing the motor.

特開２０１２－６２９４８号公報JP2012-62948A

本発明は、以上の点に鑑み、モータ交換の作業性を可及的に向上できるようにしたモータ弁を提供することをその課題としている。 In view of the above points, it is an object of the present invention to provide a motor valve that can improve the workability of motor replacement as much as possible.

上記課題を解決するために、本発明は、流入口と、流出口と、流入口と流出口との一方に連通する弁室と、弁室の一端の弁座と、弁座に形成され流入口と流出口との他方に連通する弁孔とを有する弁筐と、弁座に着座して弁孔を閉塞する閉じ方向に弁バネで付勢される弁体と、弁体の軸部が摺動自在に内挿されるガイド筒部を有すると共に、弁体の軸部に固定したアーマチュアに対向する電磁石を取付けた可動体と、モータと、モータの回転により弁体の開閉方向たるＸ軸方向に可動体を進退させる連動機構とを備え、可動体を弁体に向けてＸ軸方向一方に前進させることにより、電磁石をアーマチュアに当接させ、アーマチュアを電磁石に吸着させた状態で可動体をＸ軸方向他方に後退させることにより、弁体を開動作させるようにしたモータ弁において、連動機構は、モータの出力軸が回り止めした状態で抜き差し自在に係合する係合孔が形成された端壁部と、Ｘ軸方向に傾斜して周方向にのびるカム溝が形成された周壁部とを有するカム部材と、可動体に設けられた、カム溝に係合するピンとで構成され、可動体を弁筐に対し回り止めして、カム部材の回転によりカム溝を介してピンに作用するＸ軸方向の推力で可動体がＸ軸方向に進退するようにしたことを特徴とする。 In order to solve the above problems, the present invention provides an inlet, an outlet, a valve chamber communicating with one of the inlet and the outlet, a valve seat at one end of the valve chamber, and a valve seat formed in the valve seat. A valve housing having a valve hole communicating with the other of the inlet and the outlet, a valve body seated on a valve seat and urged by a valve spring in a closing direction to close the valve hole, and a shaft portion of the valve body. A movable body that has a guide tube that is slidably inserted therein and has an electromagnet that faces an armature that is fixed to the shaft of the valve body, a motor, and an X-axis direction that is the opening and closing direction of the valve body due to the rotation of the motor. By moving the movable body forward and backward in the X-axis direction toward the valve body, the electromagnet is brought into contact with the armature, and the movable body is moved with the armature attracted to the electromagnet. In a motor valve in which the valve body is opened by moving the valve body backward in the X-axis direction, the interlocking mechanism is formed with an engagement hole that can be freely inserted and removed when the output shaft of the motor is stopped from rotating. The movable cam member is composed of an end wall part, a peripheral wall part in which a cam groove is formed that is inclined in the X-axis direction and extends in the circumferential direction, and a pin that is provided on the movable body and engages with the cam groove. It is characterized in that the body is prevented from rotating relative to the valve casing, and the movable body is moved forward and backward in the X-axis direction by the thrust in the X-axis direction that acts on the pin through the cam groove due to the rotation of the cam member.

本発明によれば、可動体及び連動機構を構成するカム部材が弁筐内に収納されていても、カム部材の端壁部に形成した係合孔からモータの出力軸を抜くだけで、連動機構からモータを分離できる。従って、モータの交換を行う際に、可動体及び連動機構を弁筐の外部に取り出す必要がなく、モータ交換の作業性が可及的に向上する。 According to the present invention, even if the cam member constituting the movable body and the interlocking mechanism is housed in the valve housing, the interlocking can be performed by simply pulling out the output shaft of the motor from the engagement hole formed in the end wall of the cam member. The motor can be separated from the mechanism. Therefore, when replacing the motor, there is no need to take out the movable body and the interlocking mechanism to the outside of the valve housing, and the workability of motor replacement is improved as much as possible.

また、本発明においては、可動体に、電磁石のコアを定位置からＸ軸方向他方に後退自在に設けると共に、コアのＸ軸方向他方の端部に当接するスペーサ部材を設け、このスペーサ部材とカム部材の端壁部との間に、可動体に対しコアを定位置に付勢保持するクッションバネを介設することが望ましい。これによれば、弁体が閉弁位置に存する状態で、可動体をＸ軸方向一方に前進させて、コアをアーマチュアに当接させる際、コアがクッションバネの付勢力に抗してＸ軸方向他方に後退し、アーマチュアに対するコアの衝突ショックを緩和できる。また、可動体がクッションバネの付勢力でコアを介してＸ軸方向一方に付勢されるため、可動体をＸ軸方向一方に前進させる際のモータの負荷をクッションバネの付勢力分軽減でき、モータの小型化が可能になる。更に、クッションバネとコアとの間にスペーサ部材が介設されるため、コアがクッションバネとのこじりで傾くようなことがなく、アーマチュアを安定して吸着できる。 Further, in the present invention, the movable body is provided with the core of the electromagnet so as to be retractable in the other direction in the X-axis direction from a fixed position, and a spacer member that abuts the other end in the X-axis direction of the core is provided, and this spacer member and It is desirable to interpose a cushion spring between the cam member and the end wall portion to bias and hold the core in a fixed position with respect to the movable body. According to this, when the movable body is advanced in one direction in the X-axis direction and the core is brought into contact with the armature while the valve body is in the valve-closing position, the core resists the biasing force of the cushion spring and moves along the X-axis. By retreating in the other direction, the impact shock of the core against the armature can be alleviated. In addition, since the movable body is biased in one direction in the X-axis direction by the biasing force of the cushion spring through the core, the load on the motor when moving the movable body forward in one direction in the X-axis can be reduced by the biasing force of the cushion spring. , it becomes possible to downsize the motor. Further, since the spacer member is interposed between the cushion spring and the core, the core is not tilted due to the force of the cushion spring, and the armature can be stably attracted.

また、本発明において、可動体は、電磁石のコイルを巻回するボビンが設けられた第１部材と、ガイド筒部を有する、弁筐に対し回り止めされる第２部材との２部材を結合して構成されることが望ましい。これによれば、第１部材を第２部材から分離した状態で、ボビンに第２部材に邪魔されることなくコイルを巻回した後、第１部材と第２部材とを結合して可動体を組み立てることができ、組立性が向上する。 Further, in the present invention, the movable body connects two members: a first member provided with a bobbin for winding a coil of an electromagnet, and a second member having a guide cylinder portion and prevented from rotating with respect to the valve casing. It is desirable that the According to this, after the first member is separated from the second member and the coil is wound around the bobbin without being interfered with by the second member, the first member and the second member are combined to form the movable body. can be assembled, improving ease of assembly.

本発明の実施形態のモータ弁の切断側面図。FIG. 2 is a cutaway side view of a motor valve according to an embodiment of the present invention. 図１のＩＩ－ＩＩで切断した断面図。A cross-sectional view taken along II-II in FIG. 1. 実施形態のモータ弁の要部の分解状態の斜視図。FIG. 2 is an exploded perspective view of the main parts of the motor valve of the embodiment. 実施形態のモータ弁に設けられるカム部材の拡大側面図。FIG. 3 is an enlarged side view of a cam member provided in the motor valve of the embodiment.

図１、図２を参照して、１は、本発明の実施形態のモータ弁の弁筐を示している。この弁筐１は、流入口１１と、流出口１２と、流入口１１に連通する弁室１３と、弁室１３の一端の弁座１４とを有しており、弁座１４には、流出口１２に連通する弁孔１４１が形成されている。尚、本実施形態のモータ弁は、ガス器具のバーナに対するガス供給路に介設されるものであり、流出口１２から流出するガスがバーナに供給される。 Referring to FIGS. 1 and 2, 1 indicates a valve housing of a motor valve according to an embodiment of the present invention. This valve housing 1 has an inlet 11, an outlet 12, a valve chamber 13 communicating with the inlet 11, and a valve seat 14 at one end of the valve chamber 13. A valve hole 141 communicating with the outlet 12 is formed. The motor valve of this embodiment is installed in a gas supply path to a burner of a gas appliance, and gas flowing out from the outlet 12 is supplied to the burner.

弁室１３には、弁体２と、可動体３とが収納されている。弁体２は、可動体３との間に縮設した弁バネ２１により、弁座１４に着座して弁孔１４１を閉塞する閉弁位置に付勢されている。また、弁体２の開閉方向をＸ軸方向、閉じ方向をＸ軸方向一方、開き方向をＸ軸方向他方として、弁体２は、弁座１４に着座するＸ軸方向一方端の弁部２２と、弁部２２からＸ軸方向他方にのびる軸部２３とを有しており、この軸部２３のＸ軸方向他方端にアーマチュア２４が固定されている。尚、本実施形態のモータ弁は、Ｘ軸方向が水平になる姿勢で配置されている。 The valve chamber 13 houses the valve body 2 and the movable body 3. The valve body 2 is biased by a valve spring 21 contracted between the movable body 3 and the valve body 2 to a closed position where the valve body 2 seats on the valve seat 14 and closes the valve hole 141 . Further, the valve body 2 has an opening/closing direction in the X-axis direction, a closing direction in one direction in the X-axis direction, and an opening direction in the other direction in the X-axis direction. and a shaft portion 23 extending from the valve portion 22 in the other direction in the X-axis direction, and an armature 24 is fixed to the other end of the shaft portion 23 in the X-axis direction. Note that the motor valve of this embodiment is arranged with the X-axis direction being horizontal.

可動体３は、弁体２の軸部２３が摺動自在に内挿されるガイド筒部３１を有する。また、可動体３には、アーマチュア２４に対向する電磁石３２が取付けられている。電磁石３２は、Ｕ字状のコア３２１と、コア３２１の片側の腕部分にボビン３２２を介して巻回したコイル３２３とで構成されており、コイル３２３への通電で励磁される。コイル３２３は、弁室１３の他端を閉塞するように弁筐１に締結した蓋部材１５の側部に設けられるターミナル部１５１に給電板３２４を介して接続されている。 The movable body 3 has a guide cylinder portion 31 into which the shaft portion 23 of the valve body 2 is slidably inserted. Further, an electromagnet 32 facing the armature 24 is attached to the movable body 3. The electromagnet 32 is composed of a U-shaped core 321 and a coil 323 wound around one arm of the core 321 via a bobbin 322, and is excited when the coil 323 is energized. The coil 323 is connected via a power supply plate 324 to a terminal portion 151 provided on the side of the lid member 15 fastened to the valve housing 1 so as to close the other end of the valve chamber 13 .

尚、図３も参照して、可動体３は、ボビン３２２が設けられた有底筒状の第１部材３ａと、ガイド筒部３１を有する段付き筒状の第２部材３ｂとの２部材を結合して構成される。この結合は、第２部材３ｂのＸ軸方向他方の端部内周の環状凸部３３を第１部材３ａの中間部外周の環状溝３４に係合させることで行われる。また、ボビン３２２は、第１部材３ａのＸ軸方向一方の端壁部に、Ｘ軸方向一方に突出するように一体成形されている。このように可動体３を２部材で構成すれば、第１部材３ａを第２部材３ｂから分離した状態で、ボビン３２２に第２部材３ｂに邪魔されることなくコイル３２３を巻回した後、第１部材３ａと第２部材３ｂとを結合して可動体３を組み立てることができ、組立性が向上する。 Also referring to FIG. 3, the movable body 3 includes two members: a bottomed cylindrical first member 3a provided with a bobbin 322, and a stepped cylindrical second member 3b having a guide cylindrical portion 31. It is composed by combining. This connection is performed by engaging the annular convex portion 33 on the inner periphery of the other end in the X-axis direction of the second member 3b with the annular groove 34 on the outer periphery of the intermediate portion of the first member 3a. Further, the bobbin 322 is integrally formed with one end wall portion of the first member 3a in the X-axis direction so as to protrude in one direction in the X-axis direction. If the movable body 3 is composed of two members in this way, after the coil 323 is wound around the bobbin 322 without being interfered with by the second member 3b with the first member 3a separated from the second member 3b, The movable body 3 can be assembled by combining the first member 3a and the second member 3b, and the ease of assembly is improved.

また、弁筐１には、弁室１３の他端寄りの半部に内挿される、Ｘ軸方向一方側の小径部１６１とＸ軸方向他方側の大径部１６２と中間の段部１６３とを有する段付き筒状の内ケース１６が設けられている。そして、第２部材３ｂの中間部外周に突設したＸ軸方向にのびる各リブ３５を、内ケース１６の小径部１６１内周面に突設したＸ軸方向にのびる各一対のリブ１６４間に係合させて、第２部材３ｂ、即ち、可動体３を内ケース１６、即ち、弁筐１に対し回り止めしている。 The valve housing 1 also has a small diameter portion 161 on one side in the X-axis direction, a large diameter portion 162 on the other side in the X-axis direction, and a stepped portion 163 in the middle, which are inserted into the half of the valve chamber 13 near the other end. A stepped cylindrical inner case 16 is provided. Then, each rib 35 extending in the X-axis direction protruding from the outer periphery of the intermediate portion of the second member 3b is placed between each pair of ribs 164 extending in the X-axis direction protruding from the inner peripheral surface of the small diameter portion 161 of the inner case 16. When engaged, the second member 3b, that is, the movable body 3, is prevented from rotating relative to the inner case 16, that is, the valve housing 1.

蓋部材１５の外面には、ステッピングモータから成るモータ４が取付けられている。また、弁筐１内には、モータ４の回転により可動体３をＸ軸方向に進退させる連動機構５が設けられている。そして、可動体３を閉弁位置に存する弁体２に向けてＸ軸方向一方に前進させることにより、電磁石３２をアーマチュア２４に当接させ、アーマチュア２４をコイル３２３への通電で電磁石３２に吸着させた状態で可動体３をＸ軸方向他方に後退させることにより、弁体２を開動作させて、モータ弁を開弁させるようにしている。また、点消火スイッチによる消火操作やバーナの失火で停止指令が出されたときは、コイル３２３への通電を停止し、弁体２を弁バネ２１の付勢力で閉弁位置に復帰させて、バーナへのガス供給を停止する。 A motor 4 consisting of a stepping motor is attached to the outer surface of the lid member 15. Also, provided within the valve housing 1 is an interlocking mechanism 5 that moves the movable body 3 back and forth in the X-axis direction by rotation of the motor 4. Then, by moving the movable body 3 forward in one direction in the X-axis direction toward the valve body 2 in the closed position, the electromagnet 32 is brought into contact with the armature 24, and the armature 24 is attracted to the electromagnet 32 by energizing the coil 323. By moving the movable body 3 backward in the other direction of the X-axis in this state, the valve body 2 is operated to open, and the motor valve is opened. In addition, when a stop command is issued due to extinguishing operation using the ignition/extinguishing switch or a misfire of the burner, the energization to the coil 323 is stopped, and the valve body 2 is returned to the closed position by the biasing force of the valve spring 21. Stop the gas supply to the burner.

連動機構５は、モータ４の出力軸４１が回り止めした状態で抜き差し自在に係合する係合孔５１１が形成された端壁部５１２と、Ｘ軸方向に傾斜して周方向にのびるカム溝５１３が形成された周壁部５１４とを有するカム部材５１と、可動体３に設けられた、カム溝５１３に係合するピン５２とで構成されている。モータ４を回転させると、カム部材５１が回転し、この回転によりカム溝５１３を介してピン５２にＸ軸方向の推力が作用し、この推力で可動体３がＸ軸方向に進退する。カム部材５１は、内ケース１６の大径部１６２内に、内ケース１６の段部１６３と蓋部材１５との間に挟まれてＸ軸方向には動かずに回転するように配置されている。 The interlocking mechanism 5 includes an end wall portion 512 formed with an engagement hole 511 that engages with the output shaft 41 of the motor 4 in a state where it is stopped from rotating, and a cam groove that is inclined in the X-axis direction and extends in the circumferential direction. The cam member 51 includes a cam member 51 having a peripheral wall portion 514 in which a groove 513 is formed, and a pin 52 that is provided on the movable body 3 and engages with the cam groove 513. When the motor 4 is rotated, the cam member 51 rotates, and this rotation causes a thrust in the X-axis direction to act on the pin 52 through the cam groove 513, and this thrust causes the movable body 3 to advance and retreat in the X-axis direction. The cam member 51 is disposed within the large diameter portion 162 of the inner case 16 and is sandwiched between the step portion 163 of the inner case 16 and the lid member 15 so as to rotate without moving in the X-axis direction. .

尚、可動体３の第１部材３ａの周壁部にはピン孔３６が形成され、更に、第２部材３ｂに、第１部材３ａの周壁部に沿ってＸ軸方向他方にのびるアーム部３７を延出し、このアーム部３７に第１部材３ａのピン孔３６に重なるピン孔３８を形成している。そして、これらピン孔３６，３８にピン５２を挿通することで、可動体３にピン５２を連結している。 A pin hole 36 is formed in the peripheral wall of the first member 3a of the movable body 3, and an arm part 37 extending in the other direction of the X-axis along the peripheral wall of the first member 3a is formed in the second member 3b. A pin hole 38 that extends and overlaps the pin hole 36 of the first member 3a is formed in this arm portion 37. The pin 52 is connected to the movable body 3 by inserting the pin 52 into these pin holes 36 and 38.

以上の構成によれば、可動体３及び連動機構５を構成するカム部材５１が弁筐１内に収納されていても、カム部材５１の端壁部５１２に形成した係合孔５１１からモータ４の出力軸４１を抜くだけで、連動機構５からモータ４を分離できる。従って、モータ４の交換を行う際に、可動体３及び連動機構５を弁筐１の外部に取り出す必要がなく、モータ交換の作業性が可及的に向上する。 According to the above configuration, even if the cam member 51 constituting the movable body 3 and the interlocking mechanism 5 is housed in the valve housing 1, the motor 4 can be inserted through the engagement hole 511 formed in the end wall portion 512 of the cam member 51. The motor 4 can be separated from the interlocking mechanism 5 by simply removing the output shaft 41 of the motor. Therefore, when replacing the motor 4, there is no need to take out the movable body 3 and the interlocking mechanism 5 to the outside of the valve housing 1, and the work efficiency of motor replacement is improved as much as possible.

また、本実施形態では、モータ４、即ち、カム部材５１のほぼ１／４回転で可動体３をＸ軸方向一方のストローク端からＸ軸方向他方のストローク端まで移動できるようにカム溝５１３を形成している。更に、図４に明示する如く、カム溝５１３のＸ軸方向一方と他方の端部をＸ軸方向に傾斜しないフラット部５１３ａ，５１３ｂに形成している。そのため、各フラット部５１３ａ，５１３ｂにピン５２が係合している限り、モータ４の回転停止位置が多少ずれても、可動体３はＸ軸方向一方と他方の各ストローク端に位置することになり、制御が容易になる。 Further, in this embodiment, the cam groove 513 is formed so that the movable body 3 can be moved from one stroke end in the X-axis direction to the other stroke end in the X-axis direction by approximately 1/4 rotation of the motor 4, that is, the cam member 51. is forming. Furthermore, as clearly shown in FIG. 4, one and the other end of the cam groove 513 in the X-axis direction are formed into flat portions 513a and 513b that are not inclined in the X-axis direction. Therefore, as long as the pin 52 is engaged with each flat portion 513a, 513b, even if the rotation stop position of the motor 4 is slightly shifted, the movable body 3 will be located at each stroke end in the X-axis direction. This makes control easier.

ところで、電磁石３２のコア３２１が可動体３に固定されていると、弁体２が閉弁位置に存する状態で可動体３をＸ軸方向一方に前進させて、コア３２１をアーマチュア２４に当接させる際に、アーマチュア２４に対するコア３２１の衝突ショックが発生する。そこで、本実施形態では、可動体３、具体的には第１部材３ａに、コア３２１を定位置、即ち、コア３２１の基端部が第１部材３ａのＸ軸方向一方の端壁部に当接する位置からＸ軸方向他方に後退自在となるように設けている。更に、コア３２１のＸ軸方向他方の端部に当接する、ピン５２を跨ぐ二股状のスペーサ部材３２５を設けて、このスペーサ部材３２５とカム部材５１の端壁部５１２との間に、可動体３に対しコア３２１を定位置に付勢保持するクッションバネ３２６を介設している。 By the way, if the core 321 of the electromagnet 32 is fixed to the movable body 3, the movable body 3 is moved forward in one direction in the X-axis direction with the valve body 2 in the closed position, and the core 321 is brought into contact with the armature 24. When doing so, a collision shock of the core 321 against the armature 24 occurs. Therefore, in this embodiment, the core 321 is placed in the movable body 3, specifically the first member 3a, at a fixed position, that is, the base end of the core 321 is placed on one end wall in the X-axis direction of the first member 3a. It is provided so that it can freely retreat in the other direction of the X-axis from the abutting position. Furthermore, a bifurcated spacer member 325 is provided that straddles the pin 52 and abuts the other end of the core 321 in the X-axis direction, and a movable body is provided between the spacer member 325 and the end wall portion 512 of the cam member 51. 3, a cushion spring 326 is interposed to bias and hold the core 321 in a fixed position.

これによれば、可動体３をＸ軸方向一方に前進させて、コア３２１をアーマチュア２４に当接させる際、コア３２１がクッションバネ３２６の付勢力に抗してＸ軸方向他方に後退し、アーマチュア２４に対するコア３２１の衝突ショックを緩和できる。また、可動体３は、クッションバネ３２６の付勢力でコア３２１を介してＸ軸方向一方に付勢される。そのため、可動体３をＸ軸方向一方に前進させる際のモータ４の負荷をクッションバネ３２６の付勢力分軽減でき、モータ４の小型化が可能になる。更に、クッションバネ３２６とコア３２１との間にスペーサ部材３２５が介設されるため、コア３２１がクッションバネ３２６とのこじりで傾くようなことがなく、アーマチュア２４を安定して吸着できる。 According to this, when moving the movable body 3 forward in one direction in the X-axis direction and bringing the core 321 into contact with the armature 24, the core 321 retreats in the other direction in the X-axis direction against the biasing force of the cushion spring 326. The impact shock of the core 321 against the armature 24 can be alleviated. Furthermore, the movable body 3 is biased in one direction in the X-axis direction via the core 321 by the biasing force of the cushion spring 326 . Therefore, the load on the motor 4 when moving the movable body 3 forward in one direction in the X-axis direction can be reduced by the biasing force of the cushion spring 326, and the motor 4 can be made smaller. Further, since the spacer member 325 is interposed between the cushion spring 326 and the core 321, the core 321 is not tilted due to prying with the cushion spring 326, and the armature 24 can be stably attracted.

以上、本発明の実施形態について図面を参照して説明したが、本発明はこれに限定されない。例えば、上記実施形態では、可動体３に、これとは別体のピン５２を連結しているが、可動体３の例えば第１部材３ａに、カム部材５１のカム溝５１３に係合する突起部を一体成形し、この突起部でピン５２を構成してもよい。また、弁筐１自体に内ケース１６と同様の機能を持たせて、内ケース１６を省略すること可能である。更に、上記実施形態では、弁室１３に連通するポートを流入口１１、弁孔１４１に連通するポートを流出口１２としたが、弁室１３に連通するポートを流出口、弁孔１４１に連通するポートを流入口としてもよい。また、上記実施形態では、モータ弁をＸ軸方向が水平となる姿勢で配置しているが、Ｘ軸方向が鉛直となる姿勢でモータ弁を配置してもよい。 Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited thereto. For example, in the above embodiment, the pin 52 which is separate from the movable body 3 is connected to the movable body 3. For example, the first member 3a of the movable body 3 has a protrusion that engages with the cam groove 513 of the cam member 51. The pin 52 may be formed by integrally molding the protrusion. Further, it is possible to omit the inner case 16 by giving the valve housing 1 itself a function similar to that of the inner case 16. Furthermore, in the above embodiment, the port communicating with the valve chamber 13 is the inlet port 11 and the port communicating with the valve hole 141 is the outlet port 12, but the port communicating with the valve chamber 13 is the outlet port and the port communicating with the valve hole 141. The port may be used as the inlet. Further, in the above embodiment, the motor valve is arranged with the X-axis direction being horizontal, but the motor valve may be arranged with the X-axis direction being vertical.

１…弁筐、１１…流入口、１２…流出口、１３…弁室、１４…弁座、１４１…弁孔、２…弁体、２１…弁バネ、２３…軸部、２４…アーマチュア、３…可動体、３ａ…第１部材、３ｂ…第２部材、３１…ガイド筒部、３２…電磁石、３２１…コア、３２２…ボビン、３２３…コイル、３２５…スペーサ部材、３２６…クッションバネ、４…モータ、４１…出力軸、５…連動機構、５１…カム部材、５１１…係合孔、５１２…端壁部、５１３…カム溝、５１４…周壁部、５２…ピン。 DESCRIPTION OF SYMBOLS 1... Valve housing, 11... Inlet, 12... Outlet, 13... Valve chamber, 14... Valve seat, 141... Valve hole, 2... Valve body, 21... Valve spring, 23... Shaft, 24... Armature, 3 ...Movable body, 3a...First member, 3b...Second member, 31...Guide tube, 32...Electromagnet, 321...Core, 322...Bobbin, 323...Coil, 325...Spacer member, 326...Cushion spring, 4... Motor, 41... Output shaft, 5... Interlocking mechanism, 51... Cam member, 511... Engagement hole, 512... End wall portion, 513... Cam groove, 514... Surrounding wall portion, 52... Pin.

Claims

流入口と、流出口と、流入口と流出口との一方に連通する弁室と、弁室の一端の弁座と、弁座に形成され流入口と流出口との他方に連通する弁孔とを有する弁筐と、弁座に着座して弁孔を閉塞する閉弁位置に弁バネで付勢される弁体と、弁体の軸部が摺動自在に内挿されるガイド筒部を有すると共に、弁体の軸部に固定したアーマチュアに対向する電磁石を取付けた可動体と、モータと、モータの回転により弁体の開閉方向たるＸ軸方向に可動体を進退させる連動機構とを備え、可動体を弁体に向けてＸ軸方向一方に前進させることにより、電磁石をアーマチュアに当接させ、アーマチュアを電磁石に吸着させた状態で可動体をＸ軸方向他方に後退させることにより、弁体を開動作させるようにしたモータ弁において、
連動機構は、モータの出力軸が回り止めした状態で抜き差し自在に係合する係合孔が形成された端壁部と、Ｘ軸方向に傾斜して周方向にのびるカム溝が形成された周壁部とを有するカム部材と、可動体に設けられた、カム溝に係合するピンとで構成され、可動体を弁筐に対し回り止めして、カム部材の回転によりカム溝を介してピンに作用するＸ軸方向の推力で可動体がＸ軸方向に進退するようにしたことを特徴とするモータ弁。 An inlet, an outlet, a valve chamber communicating with one of the inlet and the outlet, a valve seat at one end of the valve chamber, and a valve hole formed in the valve seat and communicating with the other of the inlet and outlet. a valve housing having a valve housing, a valve body seated on a valve seat and biased by a valve spring to a valve closing position that closes a valve hole, and a guide cylinder portion into which a shaft portion of the valve body is slidably inserted. It also includes a movable body with an electromagnet attached opposite to an armature fixed to the shaft of the valve body, a motor, and an interlocking mechanism that moves the movable body forward and backward in the X-axis direction, which is the opening and closing direction of the valve body, by rotation of the motor. By moving the movable body forward in one direction in the X-axis direction toward the valve body, the electromagnet is brought into contact with the armature, and by moving the movable body back in the other direction in the X-axis direction with the armature attracted to the electromagnet, the valve is moved. In a motor valve that operates to open the body,
The interlocking mechanism consists of an end wall formed with an engagement hole that engages with the output shaft of the motor so that it can be freely inserted and removed while the motor's output shaft is stopped from rotating, and a peripheral wall that is formed with a cam groove that is inclined in the X-axis direction and extends in the circumferential direction. It consists of a cam member having a section and a pin provided on the movable body that engages with a cam groove. A motor valve characterized in that a movable body moves forward and backward in the X-axis direction by an applied thrust in the X-axis direction.

前記可動体に、前記電磁石のコアが定位置からＸ軸方向他方に後退自在に設けられると共に、コアのＸ軸方向他方の端部に当接するスペーサ部材が設けられ、このスペーサ部材と前記カム部材の前記端壁部との間に、可動体に対しコアを定位置に付勢保持するクッションバネが介設されることを特徴とする請求項１記載のモータ弁。 The movable body is provided with a core of the electromagnet so as to be retractable from a fixed position in the other direction of the X-axis, and a spacer member that abuts the other end of the core in the direction of the X-axis, and the spacer member and the cam member 2. The motor valve according to claim 1, further comprising a cushion spring interposed between the end wall portion and the end wall portion of the motor valve for biasing and holding the core in a fixed position with respect to the movable body.

前記可動体は、前記電磁石のコイルを巻回するボビンが設けられた第１部材と、前記ガイド筒部を有する、前記弁筐に対し回り止めされる第２部材との２部材を結合して構成されることを特徴とする請求項１又は２記載のモータ弁。 The movable body combines two members: a first member provided with a bobbin around which a coil of the electromagnet is wound, and a second member having the guide cylinder portion and prevented from rotating with respect to the valve casing. The motor valve according to claim 1 or 2, characterized in that: