JP2507149Y2 - Electric actuator - Google Patents
Electric actuatorInfo
- Publication number
- JP2507149Y2 JP2507149Y2 JP673993U JP673993U JP2507149Y2 JP 2507149 Y2 JP2507149 Y2 JP 2507149Y2 JP 673993 U JP673993 U JP 673993U JP 673993 U JP673993 U JP 673993U JP 2507149 Y2 JP2507149 Y2 JP 2507149Y2
- Authority
- JP
- Japan
- Prior art keywords
- cam
- output shaft
- electric actuator
- delay
- cam portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Electrically Driven Valve-Operating Means (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、主としてボールバルブ
やバタフライバルブなどの回転弁に用いられる電動アク
チュエータに関し、特に、出力軸の回転停止の位置決め
と共に、バルブの開閉の位置信号の発信を確実に行うよ
うにしたバルブ用電動アクチュエータの改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric actuator mainly used for a rotary valve such as a ball valve and a butterfly valve, and more particularly to positioning of a rotation stop of an output shaft and reliable transmission of a position signal for opening and closing the valve. The present invention relates to the improvement of an electric valve actuator.
【０００２】[0002]
【従来の技術】マイクロスイッチは微小接点間隔とスナ
ップアクション機構とを有していて、カム等でマイクロ
スイッチの駆動部に作用すると、それまで閉じていた回
路が開き、同時に今まで開いていた別の回路が閉じる構
造になっている。しかし、カム等が前者の回路を開くま
で駆動部に作用し、スナップアクション機構がまだ作動
しない状態で停止すると、前者の回路は開いたが後者の
回路を閉じない状態のままになる。2. Description of the Related Art A microswitch has a minute contact distance and a snap action mechanism, and when a cam or the like acts on a driving portion of the microswitch, a circuit that has been closed until then opens and at the same time, another circuit that has been open until now. The circuit is closed. However, if the cam or the like acts on the drive unit until the former circuit is opened, and the snap action mechanism is stopped while it is not operating, the former circuit remains open but the latter circuit remains unclosed.
【０００３】バルブを開閉する電動アクチュエータにお
いて、前者の回路がモータ回路であり後者の回路が開閉
位置表示ランプの回路であれば、上記の状態は、モータ
の回転によって開弁又は閉弁している時に、カムがマイ
クロスイッチの駆動部に作用してモータが止まりバルブ
が開弁状態又は閉弁状態になったのに、開閉位置表示ラ
ンプが開弁状態又は閉弁状態を表示しない状態である。
このようなことは、アクチュエータの出力軸の回転速度
が比較的遅い場合、又はモータの停止性が極めて良い場
合に起こり勝ちであり、誤操作の原因になり、操業上ば
かりか安全上にも極めて重大な問題である。In the electric actuator for opening and closing the valve, if the former circuit is the motor circuit and the latter circuit is the circuit for the open / close position indicator lamp, the above state is opened or closed by the rotation of the motor. At some times, the cam acts on the drive part of the microswitch to stop the motor and open or close the valve, but the open / close position display lamp does not indicate the open or closed state.
Such a thing is likely to occur when the rotation speed of the output shaft of the actuator is relatively slow, or when the stopping performance of the motor is extremely good, which causes an erroneous operation and is extremely important not only in operation but also in safety. Problem.
【０００４】[0004]
【考案が解決しようとする課題】本考案の電動アクチュ
エータは、上記のマイクロスイッチの回路切り替え作動
に関する課題を解決するためのもので、出力軸の回転停
止の位置決めと、バルブ開閉の位置信号の発信を確実に
行うことを目的とする。SUMMARY OF THE INVENTION The electric actuator of the present invention is intended to solve the above-mentioned problems associated with the circuit switching operation of the microswitch, and to position the rotation stop of the output shaft and issue a position signal for opening and closing the valve. The purpose is to ensure.
【０００５】[0005]
【課題を解決するための手段】上記の目的を達成するた
め、本考案は、出力軸に連動して回転するカムがマイク
ロスイッチの駆動部に作用して該出力軸の回転停止の位
置決めと位置信号の発信とを行う電動アクチュエータで
あって、該カムを、該駆動部に作用する作用カム部が該
出力軸に対して回転方向の遊びを有している遅延カム機
構にした。In order to achieve the above-mentioned object, the present invention provides a positioning and position of rotation stop of the output shaft by a cam rotating in conjunction with the output shaft acting on a driving portion of the microswitch. An electric actuator for transmitting a signal, wherein the cam is a delay cam mechanism in which a working cam portion acting on the drive portion has a play in a rotational direction with respect to the output shaft.
【０００６】この場合、該遅延カム機構を、該出力軸に
対して遊びなしで連動して回転する本カム部に該本カム
部に対して一定回転角度の遊びを有する該作用カム部を
組み合わせて構成するとよく、また、該遅延カム機構
を、該本カム部より遊びの回転角度だけ遅れて回転して
いた該作用カム部が、該出力軸の回転停止の位置におい
て、該駆動部の弾発力によって回転の遅れの一部又は全
部を回復させられるように構成するとよい。In this case, the delay cam mechanism is combined with the main cam portion which rotates in conjunction with the output shaft without any play, and the working cam portion having a certain rotational angle with respect to the main cam portion. The action cam portion, which was rotating the delay cam mechanism with a rotation angle of play being delayed from the main cam portion, causes the delay cam mechanism to rotate at a position where the rotation of the output shaft is stopped. It may be configured so that a part or all of the delay of rotation can be recovered by the force of generation.
【０００７】[0007]
【作用】本考案の電動アクチュエータは、マイクロスイ
ッチの駆動部に作用するカムが遅延カム機構を有してい
て、駆動部に直接作用する作用カム部が、出力軸に対し
て遊びなしで連動して回転する本カム部に、本カム部に
対して一定回転角度の遊びを設けて組み合わされてお
り、出力軸の回転停止の位置において、作用カム部が駆
動部の弾発力によって回転の遅れの一部又は全部を回復
させられて更に回転するので、それまで閉じていた回路
が開くだけでなく、今まで開いていた別の回路を確実に
開き、前者の回路を開いたが後者の回路が閉じないとい
う状態には決してならない。従ってこのための誤操作の
心配がなく、操業上及び安全上の問題を生じない。In the electric actuator according to the present invention, the cam acting on the driving portion of the microswitch has a delay cam mechanism, and the acting cam portion directly acting on the driving portion is interlocked with the output shaft without any play. The main cam part that rotates by rotating the main cam part is provided with a certain amount of play with respect to the main cam part, and when the output shaft stops rotating, the action cam part delays the rotation due to the elastic force of the drive part. Since some or all of the parts are restored and rotate further, not only the circuit that was closed until then opens another circuit that was open so far, but the former circuit is opened, but the latter circuit is opened. Never closes. Therefore, there is no fear of erroneous operation for this reason, and there is no problem in operation and safety.
【０００８】[0008]
【実施例】次に、本考案の電動アクチュエータを、その
一部を示した図面と代表的な電気回路図に基づき、その
構造と作用を併せて説明する。図１及び図２は、本考案
の電動アクチュエータのカムとマイクロスイッチを説明
するための部分外観図であって、１はカム、２はマイク
ロスイッチであり、カム１は本カム部３と作用カム部４
とからなり、５はマイクロスイッチ２の駆動部である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the structure and operation of the electric actuator of the present invention will be described based on the drawing showing a part thereof and a typical electric circuit diagram. 1 and 2 are partial external views for explaining a cam and a micro switch of an electric actuator of the present invention, wherein 1 is a cam, 2 is a micro switch, and cam 1 is a main cam portion 3 and a working cam. Part 4
And 5 is a drive unit of the microswitch 2.
【０００９】３ａは本カム部３の軸部、３ｂは本カム部
３のピン部であり、軸部３ａは作用カム部４の軸穴部４
ａに回転自在に挿入してあり、ピン部３ｂは作用カム部
４に設けたピン部３ｂの径より大きい径を持つピン穴部
４ｂに挿入してある。作用カム部４の外周面は、大径円
周面４ｃと小径円周面４ｄとで形成されており、大径円
周面４ｃでマイクロスイッチ２の駆動部５に押し作用を
し、小径円周面４ｄでマイクロスイッチ２の駆動部５に
放し作用をする。なお、本カム部３はアクチュエータの
出力軸（図に示してない）に対して遊びなしで連動して
回転するようになっている。Reference numeral 3a is a shaft portion of the main cam portion 3, 3b is a pin portion of the main cam portion 3, and the shaft portion 3a is a shaft hole portion 4 of the working cam portion 4.
It is rotatably inserted in a, and the pin portion 3b is inserted in a pin hole portion 4b having a diameter larger than the diameter of the pin portion 3b provided in the action cam portion 4. The outer peripheral surface of the action cam portion 4 is formed of a large-diameter circumferential surface 4c and a small-diameter circumferential surface 4d. The large-diameter circumferential surface 4c pushes the driving portion 5 of the microswitch 2 to form a small-diameter circle. The peripheral surface 4d acts on the driving portion 5 of the microswitch 2 to release it. It should be noted that the cam portion 3 is adapted to rotate in conjunction with an output shaft (not shown) of the actuator without play.
【００１０】本カム部３と作用カム部４との関係は、図
１のように、本カム部３が矢印の方向に回転する時、ピ
ン部３ｂがピン穴部４ｂを押して、作用カム部４を矢印
の方向に回転させる。なお、ピン部３ｂとピン穴部４ｂ
との間の遊びが、作用カム部４が回転して小径円周面４
ｄから大径円周面４ｃに移る外周面４ｅが駆動部５に押
し作用をする時、及び大径円周面４ｃが駆動部５に接触
して回転する時に、作用カム部４が本カム部３より遅れ
て回転するように作用する。図１に示した状態はこのよ
うな状態である。The relationship between the main cam portion 3 and the working cam portion 4 is that, as shown in FIG. 1, when the main cam portion 3 rotates in the direction of the arrow, the pin portion 3b pushes the pin hole portion 4b, and the working cam portion 4b. Rotate 4 in the direction of the arrow. In addition, the pin portion 3b and the pin hole portion 4b
The play between the action cam portion 4 rotates and the small diameter circumferential surface 4
When the outer peripheral surface 4e that moves from d to the large-diameter circumferential surface 4c pushes the driving portion 5, and when the large-diameter circumferential surface 4c contacts the driving portion 5 and rotates, the working cam portion 4 becomes the main cam. It acts so as to rotate later than the portion 3. The state shown in FIG. 1 is such a state.
【００１１】図２に示したように、作用カム部４と駆動
部５との接触位置が作用カム部４の大径円周面４ｃから
小径円周面４ｄに移る外周面４ｆになると、駆動部５が
自身が持つ弾発力で放し作用をされると共に、後にも述
べるように、この弾発力によって作用カム部４が回転の
遅れの一部又は全部を回復するように回転させられる。As shown in FIG. 2, when the contact position between the working cam portion 4 and the driving portion 5 becomes the outer peripheral surface 4f which moves from the large diameter circumferential surface 4c of the working cam portion 4 to the small diameter circumferential surface 4d, driving is performed. The part 5 is released by its own resilience and, as will be described later, this resilience causes the action cam part 4 to rotate so as to recover some or all of the delay in rotation.
【００１２】図３は、電動アクチュエータの代表的な電
気回路図であって、ＯＬＳとＳＬＳは、それぞれ開弁時
と閉弁時に作用されるマイクロスイッチである。図に示
したようにマイクロスイッチＳＬＳがモータＭの回路の
接点ＮＣを閉じている状態において、切替スイッチを図
のようにすると、モータＭが回転し、出力軸が回転し、
図１に示したような本カム部３及び作用カム部４も回転
する状態になる。FIG. 3 is a typical electric circuit diagram of an electric actuator, and OLS and SLS are microswitches that operate when the valve is opened and closed, respectively. When the changeover switch is set as shown in the figure in the state where the microswitch SLS closes the contact NC of the circuit of the motor M as shown in the figure, the motor M rotates, the output shaft rotates,
The main cam portion 3 and the working cam portion 4 as shown in FIG. 1 are also in a rotating state.
【００１３】カム１の回転が更に進んで、マイクロスイ
ッチ２の駆動部５と作用カム部４との接触部が作用カム
部４の大径円周面４ｃから小径円周面４ｄに移る外周面
４ｆに移ると、駆動部５が弾発力で放し作用をされて、
マイクロスイッチＳＬＳのモータＭの回転の接点ＮＣが
僅か開かれ、モータＭが、従って出力軸及び本カム部３
が回転を停止する。しかしこの状態では、マイクロスイ
ッチＳＬＳは接点ＮＣを開いたけれどもまだ接点ＮＯを
閉じていないので、表示用のＳランプを点灯しない。As the cam 1 further rotates, the contact portion between the driving portion 5 of the micro switch 2 and the working cam portion 4 moves from the large diameter circumferential surface 4c of the working cam portion 4 to the small diameter circumferential surface 4d. Moving to 4f, the drive unit 5 is released by elastic force,
The contact NC of the rotation of the motor M of the microswitch SLS is slightly opened, and the motor M, and accordingly the output shaft and the main cam portion 3
Stops spinning. However, in this state, since the micro switch SLS has opened the contact NC but has not closed the contact NO yet, the S lamp for display is not turned on.
【００１４】しかし本考案のカム１は、作用カム部４が
本カム部３より遅れて回転しており、両者の間に回転方
向の遊びが設けられているので、作用カム部４が駆動部
５の弾発力で回転の遅れの一部又は全部を回復するよう
に回転させられ、図２の状態になるまで駆動部５が更に
放れ操作される。このためマイクロスイッチＳＬＳが接
点ＮＯを閉じ、Ｓランプを点灯する。このため、マイク
ロスイッチＳＬＳは、接点ＮＣを開くとすぐ接点ＮＯを
閉じ、誤操作を起こす原因を作らず、操作上及び安全上
の問題を生じない。However, in the cam 1 of the present invention, the working cam portion 4 is rotated later than the main cam portion 3 and the play in the rotational direction is provided between the two, so that the working cam portion 4 is driven by the driving portion. It is rotated by the elastic force of 5 so as to recover some or all of the delay of rotation, and the drive unit 5 is further released and operated until the state of FIG. 2 is reached. Therefore, the microswitch SLS closes the contact NO and turns on the S lamp. Therefore, the micro switch SLS closes the contact NO as soon as the contact NC is opened, does not create a cause of erroneous operation, and causes no operational or safety problem.
【００１５】[0015]
【考案の効果】本考案の電動アクチュエータは、独得の
遅延カム機構によって、マイクロスイッチの一方の回路
を開けば必ず他方の回路を確実に閉じ、バルブに用いた
場合に、バルブの開閉の位置決めと、バルブの開閉の位
置信号の発信を確実に行い、誤操作の原因を作らず、操
作上及び安全上の問題を生じない等の効果を有する。The electric actuator of the present invention has a unique delay cam mechanism, which ensures that if one circuit of the microswitch is opened, the other circuit is surely closed. In addition, the position signal for opening and closing the valve is reliably transmitted, the cause of erroneous operation is not created, and the operational and safety problems are not produced.
【図１】本考案の電動アクチュエータの一部を示す部分
平面図である。FIG. 1 is a partial plan view showing a part of an electric actuator of the present invention.
【図２】図１の他の状態を示す部分平面図である。FIG. 2 is a partial plan view showing another state of FIG.
【図３】電動アクチュエータの代表的な電気回路図であ
る。FIG. 3 is a typical electric circuit diagram of an electric actuator.
１ カム ２ マイクロスイッチ ３ 本カム部 ４ 作用カム部 ５ 駆動部 1 cam 2 micro switch 3 main cam 4 working cam 5 drive
Claims (3)
ロスイッチの駆動部に作用して該出力軸の回転停止の位
置決めと位置信号の発信とを行う電動アクチュエータで
あって、該カムを、該駆動部に作用する作用カム部が出
力軸に対して回転方向の遊びを有している遅延カム機構
にしたことを特徴とする電動アクチュエータ。1. An electric actuator in which a cam that rotates in conjunction with an output shaft acts on a drive portion of a microswitch to position the rotation stop of the output shaft and transmit a position signal, the cam comprising: An electric actuator characterized in that a working cam portion acting on the driving portion is a delay cam mechanism having a play in a rotational direction with respect to an output shaft.
遊びなしで連動して回転する本カム部に、該本カム部に
対して一定回転角度の遊びを有する作用カム部を組み合
わせて構成したことを特徴とする請求項１記載の電動ア
クチュエータ。2. The delay cam mechanism as set forth above, wherein a main cam portion that rotates interlockingly with an output shaft without play is combined with an action cam portion having a certain rotational angle of play with respect to the main cam portion. The electric actuator according to claim 1, which is configured.
びの回転角度だけ遅れて回転していた作用カム部が、出
力軸の回転停止の位置において該駆動部の弾発力によっ
て回転の遅れの一部又は全部を回復させられるように構
成したことを特徴とする請求項１又は請求項２記載の電
動アクチュエータ。3. The action cam portion, which was rotating the delay cam mechanism with a delay of a rotation angle of play from the main cam portion, is rotated by the elastic force of the drive portion at a position where the output shaft stops rotating. The electric actuator according to claim 1 or 2, wherein a part or all of the delay is configured to be recovered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP673993U JP2507149Y2 (en) | 1993-01-29 | 1993-01-29 | Electric actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP673993U JP2507149Y2 (en) | 1993-01-29 | 1993-01-29 | Electric actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0662770U JPH0662770U (en) | 1994-09-02 |
| JP2507149Y2 true JP2507149Y2 (en) | 1996-08-14 |
Family
ID=11646589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP673993U Expired - Fee Related JP2507149Y2 (en) | 1993-01-29 | 1993-01-29 | Electric actuator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2507149Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3659343B2 (en) * | 2001-10-22 | 2005-06-15 | リンナイ株式会社 | Thermal power control device |
| JP3659344B2 (en) * | 2001-10-22 | 2005-06-15 | リンナイ株式会社 | Thermal power control device |
| JP4716292B2 (en) * | 2007-06-19 | 2011-07-06 | リンナイ株式会社 | Comrobana |
-
1993
- 1993-01-29 JP JP673993U patent/JP2507149Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0662770U (en) | 1994-09-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |