JPH05589Y2 - - Google Patents
Info
- Publication number
- JPH05589Y2 JPH05589Y2 JP1985155681U JP15568185U JPH05589Y2 JP H05589 Y2 JPH05589 Y2 JP H05589Y2 JP 1985155681 U JP1985155681 U JP 1985155681U JP 15568185 U JP15568185 U JP 15568185U JP H05589 Y2 JPH05589 Y2 JP H05589Y2
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- feed screw
- screw shaft
- operating shaft
- rotating body
- 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 - Lifetime
Links
- 239000012530 fluid Substances 0.000 description 5
- 230000035939 shock Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Actuator (AREA)
- Transmission Devices (AREA)
- Vibration Dampers (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Description
【考案の詳細な説明】
Ａ 産業上の利用分野
本考案は回転運動を直線運動に変換するアクチ
ユエータの改良に関する。[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to an improvement in an actuator that converts rotational motion into linear motion.
Ｂ 考案の概略
本考案は回転運動を変換して操作軸を往復動さ
せる回転変換機構にボールネジを用いると共に復
帰機構を操作軸に設け前記ボールネジを逆転させ
て自動的に操作軸の復帰が行なわれるようにした
アクチユエータにおいて、復帰時には操作軸の復
帰運動に一方向クラツチを介して抵抗を与える抵
抗体を設け、作動を緩やかにし復帰時の操作軸の
衝撃を吸収するダンパを不要としたものである。B. Outline of the invention The present invention uses a ball screw as a rotation conversion mechanism that converts rotational motion to reciprocate the operating shaft, and a return mechanism is provided on the operating shaft, and the ball screw is reversed to automatically return the operating shaft. In such an actuator, a resistor is provided to provide resistance to the return movement of the operating shaft at the time of return via a one-way clutch, thereby making the operation gentler and eliminating the need for a damper to absorb the shock of the operating shaft at the time of return. .
Ｃ 従来の技術
回転運動を直線運動に変換する変換機構にボー
ルネジを用いたアクチユエータは、摩擦抵抗が少
なく動きが滑らかであることから、直線運動を行
なう操作軸に外部から力を加えると、ボールネジ
を回転させて操作軸を往復動させることができ
る。このことを利用して操作軸に操作軸が復帰す
る方向に付勢するバネやおもりを取り付けて、停
電時等非常時にアクチユエータの作動を自動的に
復帰させるように構成したアクチユエータが従来
より知られている。C. Prior Art An actuator that uses a ball screw as a conversion mechanism for converting rotational motion into linear motion has low frictional resistance and smooth movement, so if an external force is applied to the operating shaft that performs linear motion, the ball screw will It can be rotated to cause the operating shaft to reciprocate. Taking advantage of this, there have been conventionally known actuators that are configured to automatically return the actuator to operation in the event of an emergency such as a power outage by attaching a spring or weight to the operating shaft that biases the operating shaft in the direction in which it returns. ing.
Ｄ 考案が解決しようとする問題点
しかしながらこのようにバネやおもりを用いて
操作軸を復帰させるようにすると、操作軸が復帰
終了点において当接部分と衝突しその衝撃が好ま
しくなく、そのため第２図に示すように、衝突時
の衝撃を吸収させるダンパ５０を当接部分に設け
たり、又粘性流体を充填したシリンダ５１内にピ
ストン５２を組み入れてピストン５２で画成され
た２つのシリンダ室を絞り弁５３を介して連結し
た第３図に示すような速度調整機５５を必要とし
ていた。D Problems to be solved by the invention However, when the operating shaft is returned using a spring or weight in this way, the operating shaft collides with the abutting part at the return end point, and the impact is undesirable. As shown in the figure, a damper 50 is provided at the contact portion to absorb the impact at the time of a collision, and a piston 52 is installed in a cylinder 51 filled with viscous fluid to form two cylinder chambers defined by the piston 52. A speed regulator 55 as shown in FIG. 3 connected via a throttle valve 53 was required.
Ｅ 問題点を解決するための手段
前記目的を達成する本考案のアクチユエータの
構成は、電動機の回転軸に沿つて平行に配され減
速歯車を介して回転軸の駆動が伝えられる送りね
じ軸と、この送りねじ軸に螺合し且つ回転方向の
運動が拘束され前記送りねじ軸の回転により往復
動される操作軸と、前記操作軸を囲む外筒が送り
ねじ軸を回転自在に支持する外壁に設けられ且つ
該外筒と操作軸との間に設け前記電動機の通電が
遮断すると往動方向にある前記操作軸を復動方向
に押圧するバネと、前記送りねじ軸の端部側に前
記操作軸と同軸上に配設され前記送りねじ軸の回
転運動に回転抵抗を加える円盤状の回転体と、前
記回転体と送りねじ軸の端部との間に配設され前
記操作軸の復動方向の操作時における前記送りね
じ軸の回転運動時に前記円盤状の回転体と前記送
りねじ軸とを連結する一方向クラツチとから成る
ことを特徴とする。E Means for Solving the Problems The structure of the actuator of the present invention that achieves the above object includes a feed screw shaft arranged parallel to the rotation axis of the electric motor and to which drive of the rotation shaft is transmitted via a reduction gear; An operating shaft is screwed onto the feed screw shaft and is restrained from moving in the rotational direction, and is reciprocated by the rotation of the feed screw shaft, and an outer wall that rotatably supports the feed screw shaft includes an outer cylinder surrounding the operating shaft. A spring is provided between the outer cylinder and the operating shaft and presses the operating shaft in the forward direction in the backward direction when the electric motor is de-energized; a disc-shaped rotating body disposed coaxially with the shaft and applying rotational resistance to the rotational movement of the feed screw shaft; and a disk-shaped rotating body disposed between the rotary body and the end of the feed screw shaft for backward movement of the operating shaft. The present invention is characterized by comprising a one-way clutch that connects the disk-shaped rotating body and the feed screw shaft during rotational movement of the feed screw shaft during directional operation.
Ｆ 実施例
第１図は本考案にかかるアクチユエータ３０の
一実施例であり、同図に示すように、電動機５の
回転軸６に沿つて平行に配され減速歯車を有する
ギア機構７を介して回転軸６の駆動が伝えられる
送りねじ軸３と、この送りねじ軸３に螺合し且つ
回転方向の運動が拘束され前記送りねじ軸３の回
転により往復動される操作軸２と、前記操作軸２
を囲む外筒１０が送りねじ軸３を回転自在に支持
する外壁１３に設けられ且つ該外筒１０と操作軸
２との間に設け前記電動機５の通電が遮断すると
往動方向にある前記操作軸２を復動方向に押圧す
るバネ１１と、前記送りねじ軸３の端部側に前記
操作軸２と同軸上に配設され前記送りねじ軸３の
回転運動に回転抵抗を加える円盤状の回転体８
と、前記回転体８と送りねじ軸３の端部との間に
配設され前記操作軸２の復動方向の操作時におけ
る前記送りねじ軸３の回転運動時に前記円盤状の
回転体８と前記送りねじ軸３とを連結する一方向
クラツチ３１とを具備している。F. Embodiment FIG. 1 shows an embodiment of the actuator 30 according to the present invention. A feed screw shaft 3 to which the drive of the rotary shaft 6 is transmitted; an operating shaft 2 that is screwed onto the feed screw shaft 3 and whose movement in the rotational direction is restricted and is reciprocated by the rotation of the feed screw shaft 3; axis 2
An outer cylinder 10 surrounding the feed screw shaft 3 is provided on an outer wall 13 that rotatably supports the feed screw shaft 3, and is provided between the outer cylinder 10 and the operation shaft 2, and when the electric motor 5 is de-energized, the operation in the forward direction is provided. a spring 11 that presses the shaft 2 in the backward movement direction; and a disk-shaped spring 11 that is disposed coaxially with the operating shaft 2 on the end side of the feed screw shaft 3 and that applies rotational resistance to the rotational movement of the feed screw shaft 3. Rotating body 8
The disk-shaped rotating body 8 is disposed between the rotary body 8 and the end of the feed screw shaft 3, and when the feed screw shaft 3 rotates when the operation shaft 2 is operated in the backward motion direction, the disc-shaped rotary body 8 and It is equipped with a one-way clutch 31 that connects the feed screw shaft 3.
前記電動機５は、回転軸６の正逆両方向の回転
を可能にしていると共に外部からの回転軸６を回
転させようとする力に抵抗して回転軸６を停止さ
せるように通電しておくことができる。送りねじ
軸３は軸受１２で外壁１３に回動自在に支持さ
れ、一方側にボールネジ４と螺合するボルト部３
ａを形成し、他方側は抵抗体９内の回転体８に結
合している。操作軸２は筒状で内部に送りねじ軸
３を通し、送りねじ軸３に螺合するボールネジ４
を一端部に固着し、他端部には被駆動部を取り付
ける取り付け部材１４が設けてある。この操作軸
２を囲む外筒１０は円筒状で外壁１３にネジ１５
で固定してあり、内壁には内側に突出する案内部
（図示せず）を軸方向に有し、この案内部に操作
軸２が摺動自在に嵌合している。更に外筒１０の
開放端側には内壁に嵌着するリング状の係止部材
１６が取り付けてあり、操作軸２とこの係止部材
１６との間には、操作軸２を外壁１３側に押圧す
るバネ１１が取り付けてある。 The electric motor 5 is capable of rotating the rotating shaft 6 in both forward and reverse directions, and is energized so as to resist an external force that attempts to rotate the rotating shaft 6 and stop the rotating shaft 6. I can do it. The feed screw shaft 3 is rotatably supported on an outer wall 13 by a bearing 12, and has a bolt portion 3 on one side that is screwed into a ball screw 4.
a, and the other side is connected to the rotating body 8 inside the resistor 9. The operation shaft 2 has a cylindrical shape and has a feed screw shaft 3 passed through it, and a ball screw 4 that is screwed onto the feed screw shaft 3.
A mounting member 14 is provided on the other end to which a driven portion is attached. The outer cylinder 10 surrounding this operating shaft 2 has a cylindrical shape and has a screw 15 attached to the outer wall 13.
The inner wall has a guide part (not shown) projecting inward in the axial direction, and the operating shaft 2 is slidably fitted into this guide part. Furthermore, a ring-shaped locking member 16 that fits into the inner wall is attached to the open end side of the outer cylinder 10, and between the operating shaft 2 and this locking member 16, the operating shaft 2 is placed on the outer wall 13 side. A pressing spring 11 is attached.
前記送りねじ軸３の一端部に設けられた抵抗体
９は、粘性流体を入れた箱体の内部に円盤状の回
転体８を配置したもので、送りねじ軸３には一方
向クラツチ３１を介して回転体８が同軸に固定し
てある。この一方向クラツチ３１は、操作軸２が
復帰する方向、即ち送りねじ軸３が逆転する回転
運動時に回転体８と送りねじ軸３を連結するよう
に接続する。そして、電動機５を正回転させて送
りねじ軸３が正転する回転運動時には空転するよ
うになつている。 The resistor 9 provided at one end of the feed screw shaft 3 is a disc-shaped rotating body 8 placed inside a box containing viscous fluid, and a one-way clutch 31 is attached to the feed screw shaft 3. A rotating body 8 is fixed coaxially therebetween. This one-way clutch 31 connects the rotating body 8 and the feed screw shaft 3 when the operating shaft 2 returns to its original position, that is, when the feed screw shaft 3 rotates in reverse. When the electric motor 5 is rotated in the normal direction and the feed screw shaft 3 is rotated in the normal direction, the feed screw shaft 3 idles.
次に上記のアクチユエータ１の作動について、
流水路のバルブ開閉に用いたものを例に述べる。 Next, regarding the operation of the above actuator 1,
Let's take an example of a valve used to open and close a waterway valve.
すなわち取り付け部材１４には、バルブ（図示
せず）の開放操作桿（図示せず）が取り付けてあ
り、電動機５が回転（正回転とする）するとギア
機構７を通して送りねじ軸３がボールネジ４を螺
進させ、操作軸２の往動と共にバルブが開成され
る。この時、送りねじ軸３の回転運動は回転体３
には伝わらず、電動機５の回転に際しては抵抗体
９の負荷が加担されない。 That is, an operating rod (not shown) for opening a valve (not shown) is attached to the mounting member 14, and when the electric motor 5 rotates (normal rotation), the feed screw shaft 3 moves the ball screw 4 through the gear mechanism 7. The valve is opened as the operating shaft 2 moves forward. At this time, the rotational movement of the feed screw shaft 3 is
The load of the resistor 9 is not applied when the electric motor 5 rotates.
操作軸２の往動に伴ないバネ１１が吸縮する
と、バネ１１は電動機５の回転軸６を逆転させて
操作軸２が復帰するように押圧するので、導電機
５に適当な通電をして回転軸６の逆転を防止し、
バルブの開放を保持する。このバルブを閉鎖する
には、電動機５を逆転させて操作軸２を復帰させ
ればバルブは閉鎖する。そして万一停電が起きた
際には、電動機５への通電が停止するので、操作
軸２を押圧するバネ１１により送りねじ軸３を逆
転させながら操作軸２が復帰し、バルブが閉鎖さ
れる。この時、操作軸２と同軸上に配設された一
方向クラツチ３１によつて送りねじ軸３の回転運
動が回転体８に伝わり、回転体８が粘性流体内で
回転して回転抵抗を生じさせる。これにより、送
りねじ軸３の回転に抵抗が加えられて過度に高ま
つた回転となることがなく操作軸２の復帰が緩や
かに行なわれる。 When the spring 11 is compressed and compressed as the operating shaft 2 moves forward, the spring 11 reverses the rotating shaft 6 of the electric motor 5 and presses the operating shaft 2 to return, so that the conductive machine 5 is appropriately energized. to prevent the rotating shaft 6 from reversing,
Hold the valve open. To close this valve, the electric motor 5 is reversed and the operating shaft 2 is returned to its original position, thereby closing the valve. In the event of a power outage, the power supply to the electric motor 5 is stopped, so the spring 11 that presses the operating shaft 2 causes the feed screw shaft 3 to return to its original position, and the operating shaft 2 returns to its original position, closing the valve. . At this time, the rotational motion of the feed screw shaft 3 is transmitted to the rotating body 8 by the one-way clutch 31 disposed coaxially with the operating shaft 2, and the rotating body 8 rotates within the viscous fluid, producing rotational resistance. let As a result, the return of the operating shaft 2 is performed slowly without applying resistance to the rotation of the feed screw shaft 3 and causing the rotation to become excessively high.
上記構成のアクチユエータによれば、復帰時の
操作軸２を緩やかに動かすことができダンパを不
要にすると共に、電動機５の正回転時に抵抗体９
から抵抗が加えられないので電動機５を小型にで
きかつ消費電力を小さくできる。 According to the actuator having the above configuration, the operation shaft 2 can be moved gently when returning, eliminating the need for a damper, and the resistor 9 can be used when the electric motor 5 rotates forward.
Since no resistance is added, the electric motor 5 can be made smaller and its power consumption can be reduced.
尚、上記実施例では、戻し機構としてバネ１１
を用い、又アクチユエータ３０の作動方向を操作
軸２の伸出方向としたが本考案はこれに限らず、
戻し機構に落下する重錘の索引力を用いたもの
や、又アクチユエータの作動方向が操作軸の引込
み方向としたものであつてよく、更に抵抗体９の
回転体８をフイン付きにしてもよく、この場合に
フインの面積・角度枚数等、及び粘性流体の粘性
値を適当に選択すれば任意の抵抗値を有する抵抗
体９を設定でき、操作軸２の復帰状態を最適なも
のとすることができる。又、抵抗体９は流体の粘
性抵抗を用いたものでなく、固体の摩擦抵抗を用
いたものであつてもよく、その取り付け箇所も送
りねじ軸３に直接でなく一方向クラツチ３１を介
して送りねじ軸３に連結していればギア機構７の
一部や電動機５の回転軸６等であつてもよい。 In the above embodiment, the spring 11 is used as the return mechanism.
, and the operating direction of the actuator 30 is the extending direction of the operating shaft 2, but the present invention is not limited to this.
It may be possible to use the indexing force of a weight falling on the return mechanism, or it may be such that the operating direction of the actuator is the retracting direction of the operating shaft.Furthermore, the rotating body 8 of the resistor 9 may be provided with fins. In this case, by appropriately selecting the area, angle, etc. of the fins, and the viscosity value of the viscous fluid, a resistor 9 having an arbitrary resistance value can be set, and the return state of the operating shaft 2 can be optimized. I can do it. Furthermore, the resistor 9 may be one that uses solid frictional resistance instead of the viscous resistance of a fluid, and its mounting location is not directly on the feed screw shaft 3 but via a one-way clutch 31. As long as it is connected to the feed screw shaft 3, it may be a part of the gear mechanism 7, the rotating shaft 6 of the electric motor 5, or the like.
Ｇ 考案の効果
本考案によれば、操作軸と同軸上に配設され当
該操作軸の復帰時にのみ連結する一方向クラツチ
を介して送りねじ軸の回転に抵抗を与える円盤状
の回転体を設けたことにより、操作軸の復帰を緩
かにさせて衝突による衝撃を減少でき、衝撃吸収
用のダンパを不要にして構造上の強度を小さくし
構成を簡素にすることができると共に、電動機を
小型化することができ消費電力を小さくできる。G. Effect of the invention According to the invention, a disc-shaped rotating body is provided that provides resistance to the rotation of the feed screw shaft through a one-way clutch that is disposed coaxially with the operating shaft and is connected only when the operating shaft returns. As a result, the return of the operating shaft is made more gradual, reducing the shock caused by a collision, eliminating the need for a shock absorbing damper, reducing structural strength, simplifying the configuration, and making the electric motor more compact. power consumption can be reduced.
また、操作軸と同軸上に一方向クラツチを介し
て円盤状の回転体を結合しているので構造が簡易
となり、コンパクトなアクチユエータを得ること
ができる。 Furthermore, since the disc-shaped rotating body is connected coaxially with the operating shaft via a one-way clutch, the structure is simple and a compact actuator can be obtained.
第１図は本考案にかかるアクチユエータの実施
例を示す断面図であり、第２図は従来例にかかる
アクチユエータを示す断面図、第３図は従来例の
アクチユエータに使用していた速度調整器を示す
断面図である。
図面中、２は操作軸、３は送りねじ軸、４はボ
ールネジ、５は電動機、７はギア機構、８は回転
体、９は抵抗体、３０はアクチユエータである。
FIG. 1 is a sectional view showing an embodiment of the actuator according to the present invention, FIG. 2 is a sectional view showing an actuator according to a conventional example, and FIG. 3 is a sectional view showing a speed regulator used in the conventional actuator. FIG. In the drawings, 2 is an operating shaft, 3 is a feed screw shaft, 4 is a ball screw, 5 is an electric motor, 7 is a gear mechanism, 8 is a rotating body, 9 is a resistor, and 30 is an actuator.
Claims (1)
を介して回転軸の駆動が伝えられる送りねじ軸
と、 この送りねじ軸に螺合し且つ回転方向の運動が
拘束され前記送りねじ軸の回転により往復動され
る操作軸と、 前記操作軸を囲む外筒が送りねじ軸を回転自在
に支持する外壁に設けられ且つ該外筒と操作軸と
の間に設け前記電動機の通電が遮断すると往動方
向にある前記操作軸を復動方向に押圧するバネ
と、 前記送りねじ軸の端部側に前記操作軸と同軸上
に配設され前記送りねじ軸の回転運動に回転抵抗
を加える円盤状の回転体と、 前記回転体と送りねじ軸の端部との間に配設さ
れ前記操作軸の復動方向の操作時における前記送
りねじ軸の回転運動時に前記円盤状の回転体と前
記送りねじ軸とを連結する一方向クラツチとから
成ることを特徴とするアクチユエータ。[Claims for Utility Model Registration] A feed screw shaft that is arranged parallel to the rotation axis of an electric motor and to which the drive of the rotation shaft is transmitted via a reduction gear; an operating shaft that is restrained and reciprocated by the rotation of the feed screw shaft; an outer cylinder surrounding the operating shaft; provided on an outer wall that rotatably supports the feed screw shaft; and provided between the outer cylinder and the operating shaft; a spring that presses the operating shaft in the forward direction in the backward direction when power to the electric motor is cut off; and a spring that is disposed coaxially with the operating shaft on the end side of the feed screw shaft and that prevents the rotation of the feed screw shaft. a disc-shaped rotating body that applies rotational resistance to the motion; and a disc-shaped rotating body that is disposed between the rotating body and the end of the feed screw shaft to prevent the rotational movement of the feed screw shaft when the operating shaft is operated in the backward movement direction. An actuator comprising a one-way clutch that connects a disc-shaped rotating body and the feed screw shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985155681U JPH05589Y2 (en) | 1985-10-14 | 1985-10-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985155681U JPH05589Y2 (en) | 1985-10-14 | 1985-10-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6263453U JPS6263453U (en) | 1987-04-20 |
| JPH05589Y2 true JPH05589Y2 (en) | 1993-01-08 |
Family
ID=31076597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985155681U Expired - Lifetime JPH05589Y2 (en) | 1985-10-14 | 1985-10-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05589Y2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4558892B2 (en) * | 2000-05-30 | 2010-10-06 | 日本ギア工業株式会社 | Electric actuator |
| KR20020041261A (en) * | 2000-11-27 | 2002-06-01 | 강성덕 | Smart hybrid damper |
| WO2006106817A1 (en) * | 2005-03-31 | 2006-10-12 | Thk Co., Ltd. | Electric actuator |
| JP2009023408A (en) * | 2007-07-17 | 2009-02-05 | Jtekt Corp | Steering device |
| JP5161395B1 (en) * | 2012-11-14 | 2013-03-13 | 株式会社免制震ディバイス | Vibration suppression device |
| JP6065219B2 (en) * | 2013-06-03 | 2017-01-25 | 清水建設株式会社 | Vibration reduction device |
| JP7315168B2 (en) * | 2019-07-22 | 2023-07-26 | 株式会社Zmp | Fluid pressure equipment and operating devices |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS528465A (en) * | 1975-07-11 | 1977-01-22 | Fujitsu Ltd | Sheathing of electronic parts |
| JPS5834557B2 (en) * | 1974-10-21 | 1983-07-27 | ニチコン株式会社 | Manufacturing method of aluminum anodized foil |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5834557U (en) * | 1981-08-27 | 1983-03-07 | 株式会社明電舎 | Electric actuator speed adjustment mechanism |
-
1985
- 1985-10-14 JP JP1985155681U patent/JPH05589Y2/ja not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5834557B2 (en) * | 1974-10-21 | 1983-07-27 | ニチコン株式会社 | Manufacturing method of aluminum anodized foil |
| JPS528465A (en) * | 1975-07-11 | 1977-01-22 | Fujitsu Ltd | Sheathing of electronic parts |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6263453U (en) | 1987-04-20 |
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