JPH07231604A - Electrically-driven cylinder device - Google Patents
Electrically-driven cylinder deviceInfo
- Publication number
- JPH07231604A JPH07231604A JP3774694A JP3774694A JPH07231604A JP H07231604 A JPH07231604 A JP H07231604A JP 3774694 A JP3774694 A JP 3774694A JP 3774694 A JP3774694 A JP 3774694A JP H07231604 A JPH07231604 A JP H07231604A
- Authority
- JP
- Japan
- Prior art keywords
- hollow rod
- attached
- seal
- rod
- screw shaft
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
Landscapes
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電動機の出力軸の回転
運動をいわゆるネジ機構により直線運動に変換するよう
に構成したシリンダ装置の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a cylinder device configured to convert a rotary motion of an output shaft of an electric motor into a linear motion by a so-called screw mechanism.
【０００２】[0002]
【従来技術と問題点】従来の電動シリンダにおいては例
えば実開平１−８６４５７にあるようにシリンダ本体チ
ュ−ブ２１の内径よりずっと小さい外径のロッド２２が
シリンダ本体チュ−ブ２１内部に出入り可能な様に取付
られており該シリンダ本体チュ−ブ２１の先端には前蓋
２３が取付られることによって該ロッド２２を支える役
割を果たし、該シリンダ本体チュ−ブ２１とロッド２２
との間の空間部２４にゴミ等が入るのを防止していた
（図１）。しかし、前蓋２３は防塵のため隙間なくシリ
ンダ本体チュ−ブ２１及びロッド２２に取り付ける必要
があるので機械加工面を多く必要とし、製作コストがか
かる。また、前記空間部２４内には空気が入っているの
で該空気はロッド２２が右方向へ移動することによって
圧縮され抵抗が発生するのでシリンダ本体チュ−ブ２１
に通気孔２５を設けなければならなかった。本発明は上
記の問題に鑑みて成されたもので機械加工面が少なく組
付が容易で製作コストを削減できる電動シリンダを提供
することを目的とする。2. Description of the Related Art In a conventional electric cylinder, a rod 22 having an outer diameter much smaller than the inner diameter of the cylinder body tube 21 can come in and out of the cylinder body tube 21 as in, for example, Japanese Utility Model Laid-Open No. 1-86457. The cylinder body tube 21 is mounted in such a manner that a front lid 23 is attached to the tip of the cylinder body tube 21 to support the rod 22.
It prevented dust and the like from entering the space 24 between the space and the space (Fig. 1). However, since the front lid 23 needs to be attached to the cylinder body tube 21 and the rod 22 without any gap for dustproof, it requires a large number of machined surfaces, resulting in high manufacturing cost. Further, since air is contained in the space 24, the air is compressed by the rod 22 moving to the right and resistance is generated.
Vent hole 25 had to be provided in the. The present invention has been made in view of the above problems, and an object of the present invention is to provide an electric cylinder that has few machined surfaces, is easy to assemble, and can reduce manufacturing costs.
【０００３】[0003]
【問題解決のための手段】上記目的を達成するために本
発明における電動シリンダ装置は軸受に回転自在にして
軸受けされるとともに正逆回転モ−タに回転伝導機構を
介して連結されたネジ軸に、その前面に底板を一体的に
取り付けたネジナットを貫通螺合すると共に該ネジ軸の
先端にその外周にピストンシ−ルを取り付けたガイドピ
ストンを固着し、該底板には、先端を蓋で封鎖した中空
ロッドを前記ガイドピストンをその中空部に摺動自在に
して嵌入させて連結固着すると共に、該中空ロッドの基
端外周にロッドシ−ルを取り付け、該中空ロッドの外周
に、その先端内面にダストシ−ル及びシリンダチュ−ブ
シ−ルを取り付けた筒状のシリンダチュ−ブを相対的に
摺動自在にして嵌合すると共にその基端を前記軸受に密
閉固着したことを特徴とする。In order to achieve the above object, an electric cylinder device according to the present invention is rotatably supported by a bearing and is also a screw shaft connected to a forward / reverse rotation motor through a rotation transmission mechanism. , A screw nut having a bottom plate integrally attached to its front surface is screwed through, and a guide piston having a piston seal attached to the outer periphery of the screw shaft is fixed to the tip of the screw shaft. The tip of the bottom plate is sealed with a lid. The guide rod is slidably fitted into the hollow portion of the hollow rod so as to be fixedly connected thereto, and a rod seal is attached to the outer periphery of the proximal end of the hollow rod. A cylindrical cylinder tube fitted with a dust seal and a cylinder tube seal was fitted so as to be relatively slidable, and its base end was hermetically fixed to the bearing. And butterflies.
【０００４】[0004]
【作用】本発明は上記のような解決手段を採用すること
によりモ−タを駆動すると、これに連結されているネジ
軸が回転することによってネジナット及び中空ロッドが
ネジに沿って左右にシリンダチュ−ブの内面を移動す
る。According to the present invention, when the motor is driven by adopting the above-mentioned solution, the screw shaft connected to the motor is rotated so that the screw nut and the hollow rod are moved to the left and right along the screw. -Move the inner surface of the knob.
【０００５】[0005]
【実施例】以下本発明の実施例を図面に基づいて詳しく
説明する。軸受１にはネジ軸２の基端部が回転自在にし
て軸受けされていると共にネジ軸２の基端は回転伝導機
構３Ａを介して正逆回転モ−タ３に連結されている。該
ネジ軸２には、その前面に底板４を一体的に取り付けた
ネジナット５が螺合貫通されており、該ネジ軸２の先端
部にはその外周にピストンシ−ル６を取り付けたガイド
ピストン７が固着されている。該底板４には、先端を蓋
８Ａで封鎖した中空ロッド８が前記ガイドピストン７を
その中空部に摺動自在にして嵌入させて連結固着されて
おり、該中空ロッド８の基端外周にはロッドシ−ル９が
取り付けられている。該中空ロッド８の外周にはその先
端内面にダストシ−ル１０及びシリンダチュ−ブ１１を
取り付けたシリンダチュ−ブ１２が相対的に摺動自在に
して嵌合されており、該シリンダチュ−ブ１２の基端は
前記軸受１に密封螺合して固着されている。Embodiments of the present invention will now be described in detail with reference to the drawings. The base end of the screw shaft 2 is rotatably supported by the bearing 1, and the base end of the screw shaft 2 is connected to the forward / reverse rotation motor 3 via the rotation transmission mechanism 3A. A screw nut 5 having a bottom plate 4 integrally attached to the front surface thereof is threadedly penetrated through the screw shaft 2, and a guide piston 7 having a piston seal 6 attached to the outer periphery thereof at the tip end portion of the screw shaft 2. Is stuck. A hollow rod 8 whose tip is closed by a lid 8A is fixedly connected to the bottom plate 4 by slidably fitting the guide piston 7 into the hollow portion of the hollow rod 8 and the outer periphery of the proximal end of the hollow rod 8. A rod seal 9 is attached. A cylinder tube 12 having a dust seal 10 and a cylinder tube 11 attached to the inner surface of the distal end of the hollow rod 8 is relatively slidably fitted therein. The base end of 12 is fixed to the bearing 1 by sealingly screwing.
【０００６】このように構成された電動シリンダは正逆
回転モ−タ３を駆動するとこれと回転伝導機構３Ａを介
して連結されたネジ軸２が回転することによってネジナ
ット５及びこれに取り付けられた中空ロッド８が左方向
へ該中空ロッド８の底板４がガイドピストン７に当接す
るまで移動可能である。この際中空ロッド８はピストン
シ−ル６、シリンダチュ−ブシ−ル１１、ロッドシ−ル
９によって支持され中空ロッド８自身の移動はほとんど
抵抗なく行うことが可能である。また、シリンダチュ−
ブ１２と中空ロッド８の隙間はほとんどないので該中空
ロッド８が原位置へ戻るときにも該隙間内の空気を圧縮
することによる抵抗はほとんど生じない。In the electric cylinder constructed as described above, when the forward / reverse rotation motor 3 is driven, the screw shaft 2 connected to the forward / reverse rotation motor 3 via the rotation transmission mechanism 3A rotates to be attached to the screw nut 5 and the screw nut 5. The hollow rod 8 can move leftward until the bottom plate 4 of the hollow rod 8 contacts the guide piston 7. At this time, the hollow rod 8 is supported by the piston seal 6, the cylinder tube seal 11 and the rod seal 9, and the movement of the hollow rod 8 itself can be performed with almost no resistance. Also, the cylinder
Since there is almost no gap between the hollow 12 and the hollow rod 8, even when the hollow rod 8 returns to the original position, there is almost no resistance caused by compressing the air in the gap.
【０００７】[0007]
【発明の効果】本発明は上記の説明から明らかなよう
に、中空ロッドの外周をシリンダチュ−ブの内面に摺動
自在に密接した構造としたので中空ロッドとシリンダチ
ュ−ブとの間を塞ぐための特別な蓋を必要としないので
部品の製作が容易であると共にシリンダ本体の組付が容
易であり全体として製作コストを削減できる。また、該
中空ロッドと該シリンダチュ−ブとの間の隙間はほとん
どないのでシリンダ作動時に空気圧縮にともなう抵抗が
ほとんど生ぜずしたがって通気孔も不要となる。As is apparent from the above description, the present invention has a structure in which the outer periphery of the hollow rod is slidably intimately contacted with the inner surface of the cylinder tube, so that the space between the hollow rod and the cylinder tube is made. Since no special lid for closing is required, the parts can be easily manufactured and the cylinder body can be easily assembled, and the manufacturing cost can be reduced as a whole. In addition, since there is almost no gap between the hollow rod and the cylinder tube, there is almost no resistance due to air compression when the cylinder is in operation, and therefore the vent hole is also unnecessary.
【図面の簡単な説明】[Brief description of drawings]
【図１】従来技術における実施例の要部断面図である。FIG. 1 is a cross-sectional view of an essential part of an example of a conventional technique.
【図２】本発明における実施例の要部断面図である。FIG. 2 is a sectional view of an essential part of an embodiment of the present invention.
２ ネジ軸 ３ 正逆回転モ−タ ４ 底板 ５ ネジナット ７ ガイドピストン ８ 中空ロッド ９ ロッドシ−ル １０ ダストシ−ル １１ シリンダチュ−ブシ−ル １２ シリンダチュ−ブ 2 Screw shaft 3 Forward / reverse rotation motor 4 Bottom plate 5 Screw nut 7 Guide piston 8 Hollow rod 9 Rod seal 10 Dust seal 11 Cylinder tube seal 12 Cylinder tube
Claims (1)
ともに正逆回転モ−タ３に回転伝導機構３Ａを介して連
結されたネジ軸２に、その前面に底板４を一体的に取り
付けたネジナット５を貫通螺合すると共に該ネジ軸２の
先端にその外周にピストンシ−ル６を取り付けたガイド
ピストン７を固着し、該底板４には、先端を蓋８Ａで封
鎖した中空ロッド８を前記ガイドピストン７をその中空
部に摺動自在にして嵌入させて連結固着すると共に、該
中空ロッド８の基端外周にロッドシ−ル９を取り付け、
該中空ロッド８の外周に、その先端内面にダストシ−ル
１０及びシリンダチュ−ブシ−ル１１を取り付けた筒状
のシリンダチュ−ブ１２を相対的に摺動自在にして嵌合
すると共にその基端を前記軸受１に密閉固着したことを
特徴とする電動シリンダ装置1. A bottom plate 4 is integrally attached to a front surface of a screw shaft 2 which is rotatably supported by a bearing 1 and which is connected to a forward / reverse rotation motor 3 through a rotation transmission mechanism 3A. A threaded nut 5 is screwed through and a guide piston 7 having a piston seal 6 attached to the outer periphery thereof is fixed to the tip of the screw shaft 2, and a hollow rod 8 whose tip is closed by a lid 8A is attached to the bottom plate 4. The guide piston 7 is slidably fitted into the hollow portion to be connected and fixed, and a rod seal 9 is attached to the outer periphery of the proximal end of the hollow rod 8.
A cylindrical cylinder tube 12 having a dust seal 10 and a cylinder tube seal 11 attached to the inner surface of the distal end of the hollow rod 8 is slidably fitted into the outer periphery of the hollow rod 8 and the base thereof. An electric cylinder device having an end hermetically fixed to the bearing 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3774694A JPH07231604A (en) | 1994-02-10 | 1994-02-10 | Electrically-driven cylinder device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3774694A JPH07231604A (en) | 1994-02-10 | 1994-02-10 | Electrically-driven cylinder device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07231604A true JPH07231604A (en) | 1995-08-29 |
Family
ID=12506050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3774694A Pending JPH07231604A (en) | 1994-02-10 | 1994-02-10 | Electrically-driven cylinder device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07231604A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009275914A (en) * | 2008-04-17 | 2009-11-26 | Smc Corp | Electric driven actuator |
| CN106195023A (en) * | 2016-07-27 | 2016-12-07 | 张晓春 | Clearance sealing structure and bearing |
-
1994
- 1994-02-10 JP JP3774694A patent/JPH07231604A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009275914A (en) * | 2008-04-17 | 2009-11-26 | Smc Corp | Electric driven actuator |
| CN106195023A (en) * | 2016-07-27 | 2016-12-07 | 张晓春 | Clearance sealing structure and bearing |
| CN106195023B (en) * | 2016-07-27 | 2019-04-19 | 张晓春 | Clearance sealing structure and bearing |
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