JPH05116900A - Position detecting device of screw actuator - Google Patents

Position detecting device of screw actuator

Info

Publication number
JPH05116900A
JPH05116900A JP3308544A JP30854491A JPH05116900A JP H05116900 A JPH05116900 A JP H05116900A JP 3308544 A JP3308544 A JP 3308544A JP 30854491 A JP30854491 A JP 30854491A JP H05116900 A JPH05116900 A JP H05116900A
Authority
JP
Japan
Prior art keywords
screw
ram
detection
detecting
drive screw
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
Application number
JP3308544A
Other languages
Japanese (ja)
Inventor
Kazunori Nakagami
一了 中神
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Showa Aircraft Industry Co Ltd
Original Assignee
Showa Aircraft Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Showa Aircraft Industry Co Ltd filed Critical Showa Aircraft Industry Co Ltd
Priority to JP3308544A priority Critical patent/JPH05116900A/en
Publication of JPH05116900A publication Critical patent/JPH05116900A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H25/00Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20Screw mechanisms
    • F16H25/2015Means specially adapted for stopping actuators in the end position; Position sensing means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

PURPOSE:To simplify constitution without using a reduction gear, exclusive means for dust prevention and damage protection, and the like, and detect an accurate position without being affected by the ambient temperature, by connecting a detecting screw with the base end side of a drive screw, and detecting a nut part which is screwed with it for reciprocating movement with a detecting means. CONSTITUTION:When a drive screw 3 is rotated normally and reversely, a ram 4 is guided and reciprocated by a cylinder 5 to move forward and backward from the top edge to the outside. A position detecting device 14 is connected with a detecting screw 15 on a base edge side of the drive screw 3, and a nut part 16 which is screwed with the detecting screw 15 and reciprocated is detected by a detecting means such as a limit switch 17 to detect the position of the ram 4. As a result, constitution is simplified without a reduction gear and exclusive means for dust prevention and damage protection. It is thus possible to facilitate installation and handling and the like of a screw actuator, because projections are not disposed around the ram and the cylinder or the like.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、スクリュウアクチュエ
ータの位置検出装置に関する。すなわち、例えばジャッ
キとして使用され、駆動スクリュウによりラムがシリン
ダに案内されつつ往復動され、先端から外部に進退動す
るスクリュウアクチュエータにおける、ラムの位置検出
装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position detecting device for a screw actuator. That is, the present invention relates to a ram position detecting device in a screw actuator that is used as a jack, for example, and a ram is reciprocated while being guided by a driving screw to a cylinder and moves back and forth from a tip to the outside.

【0002】[0002]

【従来の技術】図2は、このような位置検出装置の各従
来例を示す断面図である。まずこの種のスクリュウアク
チュエータでは、モータ1により歯車群2を介し駆動ス
クリュウ3が正逆回転駆動され、駆動スクリュウ3と螺
合するラム4が、シリンダ5に案内されて往復動され先
端から外部に進退動する。そして、図2の(1)図の従
来の位置検出装置6は、駆動スクリュウ3に減速機7を
介し回転式のポテンショメータ8を付設して構成され、
ポテンショメータ8にて、駆動スクリュウ3の回転を検
知することによりラム4の位置を検出していた。他方、
図2の(2)図の従来の位置検出装置9は、ラム4の先
端にラム4と平行に検出バー10を付設し、このように
ラム4の外部に突設された検出バー10の基端に検知部
11を設け、この検知部11を、その移動軌跡に沿いシ
リンダ5の外側に配設したリミットスイッチ12にて検
知することにより、ラム4の位置を検出していた。
2. Description of the Related Art FIG. 2 is a sectional view showing a conventional example of such a position detecting device. First, in this type of screw actuator, the motor 1 drives the drive screw 3 to rotate forward and backward through the gear group 2, and the ram 4 screwed with the drive screw 3 is guided by the cylinder 5 to reciprocate to the outside from the tip. Move back and forth. The conventional position detection device 6 shown in FIG. 2A is configured by attaching a rotary potentiometer 8 to the drive screw 3 via a speed reducer 7.
The potentiometer 8 detects the rotation of the drive screw 3 to detect the position of the ram 4. On the other hand,
In the conventional position detecting device 9 shown in FIG. 2B, a detection bar 10 is attached to the tip of the ram 4 in parallel with the ram 4, and the base of the detection bar 10 projecting outside the ram 4 in this way. The position of the ram 4 is detected by providing the detection unit 11 at the end and detecting the detection unit 11 by the limit switch 12 arranged outside the cylinder 5 along the movement locus thereof.

【0003】[0003]

【発明が解決しようとする課題】ところで、このような
従来例にあっては、次の諸問題が指摘されていた。まず
図2の(1)図の従来例にあっては、次のとおり。すな
わち、このスクリュウアクチュエータの位置検出装置6
は、ポテンショメータ8にて駆動スクリュウ3の回転を
検知しているが、駆動スクリュウ3の総回転数に比し、
回転式のポテンショメータ8の可能な総回転数が少ない
ため、両者間に減速機7を介裝することを要し、構成が
複雑化するという問題があった。又、ポテンショメータ
8は特性上、周囲温度によりその電気抵抗値が変化する
ので、正確な位置検出が困難であり検出精度が悪いとい
う問題があった。次に、図2の(2)図の従来例にあっ
ては、次のとおり。すなわち、このスクリュウアクチュ
エータの位置検出装置9は、ラム4およびシリンダ5の
周囲に検出バー10およびリミットスイッチ12等の突
起物が配設されているので、スクリュウアクチュエータ
の取り付け,取り扱いに支障を生じることが多く、不便
であるという問題があった。又、外部にリミットスイッ
チ12等が配設されるので、特に専用の防塵,破損対策
を要し、この面から構成が複雑化するという問題があっ
た。
By the way, the following problems have been pointed out in such a conventional example. First, in the conventional example of FIG. 2 (1), it is as follows. That is, the position detecting device 6 of this screw actuator
Detects the rotation of the drive screw 3 with the potentiometer 8, but in comparison with the total number of rotations of the drive screw 3,
Since the total number of possible rotations of the rotary potentiometer 8 is small, it is necessary to interpose the speed reducer 7 between the two, which causes a problem that the configuration becomes complicated. Further, since the potentiometer 8 has a characteristic that its electric resistance value changes depending on the ambient temperature, it is difficult to accurately detect the position and there is a problem that the detection accuracy is poor. Next, in the conventional example shown in FIG. That is, in the screw actuator position detecting device 9, since the protrusions such as the detection bar 10 and the limit switch 12 are arranged around the ram 4 and the cylinder 5, the screw actuator may be hindered from being attached and handled. However, there was a problem that it was inconvenient. Further, since the limit switch 12 and the like are disposed outside, there is a problem that a special dust-proof and damage countermeasure is required, which makes the structure complicated.

【0004】本発明は、このような実情に鑑み上記従来
例の問題点を解決すべくなされたものであって、駆動ス
クリュウの基端側に検出スクリュウを連結し、これと螺
合し往復動されるナット部を検知手段で検知するように
したことにより、第1に構成が簡単であると共に、第2
に検出精度が高く、第3にスクリュウアクチュエータの
取り付け,取り扱い等も容易である、スクリュウアクチ
ュエータの位置検出装置を提案することを目的とする。
The present invention has been made in view of the above circumstances and has been made to solve the problems of the above-mentioned conventional example. The detection screw is connected to the base end side of the drive screw and screwed with the detection screw to reciprocate. By detecting the nut portion to be detected by the detecting means, firstly the configuration is simple and second
Thirdly, it is an object of the present invention to propose a position detection device for a screw actuator, which has high detection accuracy and thirdly allows easy installation and handling of the screw actuator.

【0005】[0005]

【課題を解決するための手段】この目的を達成する本発
明の技術的手段は、次のとおりである。すなわち、この
スクリュウアクチュエータの位置検出装置は、外側から
シリンダ,ラム,駆動スクリュウの順に同軸に配され、
該駆動スクリュウの正逆回転駆動により、該駆動スクリ
ュウと螺合する筒状の該ラムが、回転不能かつ該シリン
ダに案内されて往復動可能とされ、先端から外部に進退
動するスクリュウアクチュエータにおける、該ラムの位
置検出装置に関する。そして、該駆動スクリュウの基端
側に連結され連動して正逆回転される検出スクリュウ
と、該検出スクリュウに螺合されその正逆回転に伴い回
転不能で往復動されるナット部と、該ナット部の移動軌
跡に沿って配され該ナット部を検知可能な検知手段と、
を有してなる。そして該ナット部は、該ラムの往復動に
対応して往復動し、該検知手段は、該ナット部の検知に
より該ラムの位置を検出するようになっている。
The technical means of the present invention for achieving this object are as follows. That is, the position detecting device for the screw actuator is coaxially arranged from the outside in the order of the cylinder, the ram, and the driving screw,
In the screw actuator that is driven by forward and reverse rotation of the drive screw, the cylindrical ram that is screwed into the drive screw is non-rotatable and guided by the cylinder to be reciprocable, and moves forward and backward from the tip to the outside. The present invention relates to a position detecting device for the ram. Then, a detection screw that is connected to the base end side of the drive screw and rotates forward and backward in conjunction with it, a nut portion that is screwed to the detection screw and that is reciprocally reciprocally driven by the forward and reverse rotation, and the nut. A detection unit that is arranged along the movement path of the section and that can detect the nut section,
To have. The nut portion reciprocates in response to the reciprocating movement of the ram, and the detecting means detects the position of the ram by detecting the nut portion.

【0006】[0006]

【作用】本発明は、このような手段よりなるので次のよ
うに作用する。スクリュウアクチュエータでは、駆動ス
クリュウが正逆回転駆動されると、ラムがシリンダに案
内されて往復動し先端から外部に進退動される。そして
この位置検出装置では、駆動スクリュウに検出スクリュ
ウが連結され、この検出スクリュウと螺合されて往復動
するナット部を検知手段で検知することにより、ラムの
位置が検出される。そこで第1に、減速機が不要である
と共に、検知手段は、駆動スクリュウの基端側において
通常用いられるケース内に収納されるので、特に専用の
防塵,破損対策も不要であり、もってこれらにより構成
が簡単である。第2に、ナット部の往復動を検知手段に
て検知する方式よりなり、周囲温度の影響を受けないの
で、正確な位置検出が実現される。第3に、この位置検
出装置は、スクリュウアクチュエータにおける駆動スク
リュウの基端側のケース内に収納され、ラム,シリンダ
等の周囲に突出物は何ら配設されないので、スクリュウ
アクチュエータの取り付け,取り扱い等は、支障なく容
易に行われる。
Since the present invention comprises such means, it operates as follows. In the screw actuator, when the driving screw is driven to rotate normally and reversely, the ram is guided by the cylinder to reciprocate and is moved forward and backward from the tip. In this position detection device, the detection screw is connected to the drive screw, and the position of the ram is detected by detecting the nut portion that is screwed with the detection screw and reciprocates. Therefore, firstly, since the speed reducer is not necessary and the detecting means is housed in the case that is usually used on the base end side of the drive screw, no special dustproof or damage countermeasure is required. Simple to configure. Secondly, since the reciprocating movement of the nut portion is detected by the detecting means and is not affected by the ambient temperature, accurate position detection can be realized. Thirdly, this position detecting device is housed in the case on the base end side of the drive screw in the screw actuator, and no protrusions are arranged around the ram, cylinder, etc., so mounting and handling of the screw actuator is not required. , Easily done without any problems.

【0007】[0007]

【実施例】以下本発明を、図面に示すその実施例に基づ
いて詳細に説明する。図1は、本発明の実施例の断面図
である。まず、スクリュウアクチュエータについて述べ
る。スクリュウアクチュエータでは、外側から内側に向
けシリンダ5,ラム4,駆動スクリュウ3が順に同軸に
配され、駆動スクリュウ3の正逆回転駆動により、駆動
スクリュウ3と螺合する筒状のラム4が、回転不能かつ
シリンダ5に案内され往復動可能とされ、先端から外部
に進退動するようになっている。すなわち、駆動源たる
モータ1の回転軸が、歯車群2を介し駆動スクリュウ3
の基端に連結されており、駆動スクリュウ3は、中空の
円筒状をなすラム4の基部内周と螺合されている。そし
て、このような駆動スクリュウ3とラム4がシリンダ5
内に同軸に配されており、ラム4は、その基部外周がシ
リンダ5にて軸方向に沿って案内されると共に、シリン
ダ5との間に付設された従来より公知の回り止め部材
(図示せず)、例えば、キーと溝を設ける又はロッドを
突設する等の回り止め部材により、回転不能となってい
る。そこで、モータ1にて駆動スクリュウ3が正逆回転
駆動されると、ラム4がシリンダ5に案内されて往復動
し、先端から外部に進退動するようになっている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. FIG. 1 is a sectional view of an embodiment of the present invention. First, the screw actuator will be described. In the screw actuator, the cylinder 5, the ram 4, and the drive screw 3 are arranged coaxially in order from the outer side to the inner side, and by the forward and reverse rotation drive of the drive screw 3, the cylindrical ram 4 screwed with the drive screw 3 is rotated. It is immovable and is guided by the cylinder 5 so that it can reciprocate, and can be moved forward and backward from the tip. That is, the rotation shaft of the motor 1 as a drive source is driven by the drive screw 3 through the gear group 2.
The driving screw 3 is screwed onto the inner circumference of the base of a ram 4 having a hollow cylindrical shape. The drive screw 3 and the ram 4 as described above are connected to the cylinder 5
The ram 4 is coaxially arranged inside, and the outer periphery of the base of the ram 4 is guided along the axial direction by the cylinder 5 and a conventionally known detent member (not shown) provided between the ram 4 and the cylinder 5. No.), for example, it cannot be rotated due to a rotation preventing member such as a key and a groove or a rod protruding. Therefore, when the drive screw 3 is driven to rotate forward and backward by the motor 1, the ram 4 is guided by the cylinder 5 to reciprocate, and moves forward and backward from the tip.

【0008】なお、13は従来より一般に用いられてい
るケースであり、このケース13内には、上述の歯車群
2,駆動スクリュウ3の基端、および後述の位置検出装
置14が収納されている。又、図示例のスクリュウアク
チュエータは、各1個のシリンダ5,ラム4,駆動スク
リュウ3が用いられたいわゆる2段式のものよりなる
が、勿論これに限らず、例えば1個のシリンダ5,2個
のラム4,2個の駆動スクリュウ3を用いた、いわゆる
3段式のものも考えられる。つまり、棒状の駆動スクリ
ュウ3を更に筒状の駆動スクリュウ3に螺合し、この筒
状の駆動スクリュウ3を先端側のラム4と螺合し、この
先端側のラム4が後端側のラム4にて案内されると共
に、後端側のラム4がシリンダ5に案内され、もって、
3段式に伸縮するようにしたスクリュウアクチュエータ
も考えられる。
Reference numeral 13 is a case that has been generally used in the past. In this case 13, the above-mentioned gear group 2, the base end of the drive screw 3, and a position detecting device 14 described later are housed. .. The screw actuator in the illustrated example is of a so-called two-stage type in which each one cylinder 5, ram 4, and drive screw 3 are used, but the present invention is not limited to this, for example, one cylinder 5, 2 A so-called three-stage type using one ram 4 and two drive screws 3 is also conceivable. That is, the rod-shaped drive screw 3 is further screwed into the tubular drive screw 3, the tubular drive screw 3 is screwed into the ram 4 on the front end side, and the ram 4 on the front end side is attached to the ram 4 on the rear end side. 4 and the ram 4 on the rear end side is guided to the cylinder 5, so that
A screw actuator that expands and contracts in three stages is also conceivable.

【0009】次に、位置検出装置14について述べる。
この位置検出装置14は、次の検出スクリュウ15とナ
ット部16と検知手段たるリミットスイッチ17と、を
有してなる。まず検出スクリュウ15は、駆動スクリュ
ウ3の基端側に連結され、連動して正逆回転されるよう
になっている。図示例の検出スクリュウ15は、その基
端が駆動スクリュウ3の基端にかさ歯車18を介し連結
され、駆動スクリュウ3と直交する方向で前述の歯車群
2と平行に、ケース13内にて保持部材19に両端部が
それぞれ保持されているが、検出スクリュウ15はこれ
に限らず、例えば駆動スクリュウ3の基端に一体的に固
定され、両者が直線状をなすように連結されたものであ
ってもよい。
Next, the position detecting device 14 will be described.
The position detecting device 14 includes the following detecting screw 15, a nut portion 16 and a limit switch 17 as a detecting means. First, the detection screw 15 is connected to the base end side of the drive screw 3 and is interlocked with and rotated forward and backward. The detection screw 15 in the illustrated example has its base end connected to the base end of the drive screw 3 via a bevel gear 18, and is held in the case 13 in a direction orthogonal to the drive screw 3 in parallel with the gear group 2 described above. Both ends of the member 19 are held by the member 19, but the detection screw 15 is not limited to this, and is fixed to, for example, the base end of the drive screw 3 integrally, and both are connected so as to form a straight line. May be.

【0010】位置検出装置14のナット部16は、この
ような検出スクリュウ15と螺合され、その正逆回転に
伴い回転不能かつ往復動可能となっている。図示例のナ
ット部16は、前述の保持部材19間に配されたバー2
0がスライド自在に挿通されることにより回転不能とさ
れると共に、この検出スクリュウ15に平行に配された
バー20にて案内されつつ、検出スクリュウ15の正逆
回転に伴い往復動するようになっている。位置検出装置
14の検知手段たるリミットスイッチ17は、このよう
なナット部16の移動軌跡に沿って複数個配され、ナッ
ト部16を検知可能となっている。そしてナット部16
が、ラム4の往復動に対応して往復動するので、検知手
段たるリミットスイッチ17は、このナット部16の検
知によりラム4の位置を検出する。図示例ではこのよう
な3個のリミットスイッチ17が、ラム4の伸端位置,
縮端位置,中間位置にそれぞれ対応した位置で、ナット
部16の移動軌跡に沿いケース13内に設けられてい
る。なお検知手段は、リミットスイッチ17以外にも各
種のものが考えられ、例えば近接スイッチを用いてもよ
い。
The nut portion 16 of the position detecting device 14 is screwed with such a detecting screw 15 and is non-rotatable and reciprocable with the forward and reverse rotation thereof. The nut portion 16 of the illustrated example is the bar 2 arranged between the holding members 19 described above.
0 is non-rotatably inserted by being slidably inserted, and is guided by a bar 20 arranged in parallel with the detection screw 15 and reciprocates as the detection screw 15 rotates forward and backward. ing. A plurality of limit switches 17, which are detection means of the position detection device 14, are arranged along the movement locus of the nut portion 16 so that the nut portion 16 can be detected. And nut portion 16
However, since the ram 4 reciprocates in response to the reciprocating motion of the ram 4, the limit switch 17, which is a detecting means, detects the position of the ram 4 by detecting the nut portion 16. In the illustrated example, such three limit switches 17 are provided at the extended position of the ram 4,
It is provided in the case 13 along the movement locus of the nut portion 16 at positions corresponding to the contracted end position and the intermediate position, respectively. Various types of detecting means other than the limit switch 17 are conceivable. For example, a proximity switch may be used.

【0011】本発明に係るスクリュウアクチュエータの
位置検出装置14は、このように構成されている。そこ
で以下のようになる。スクリュウアクチュエータでは、
モータ1により歯車群2を介し駆動スクリュウ3が正逆
回転駆動されると、駆動スクリュウ3と螺合するラム4
が、シリンダ5に案内されて往復動し先端から外部に進
退動され、もって、このような伸縮動を利用しジャッキ
その他所定の各種用途に使用される。そして、このスク
リュウアクチュエータの位置検出装置14では、駆動ス
クリュウ3の基端側に検出スクリュウ15をかさ歯車1
8を介し連結し、この検出スクリュウ15と螺合されて
往復動するナット部16を、その移動軌跡に沿い配され
た検知手段で検知することにより、ラム4の位置が検出
される。つまり図示例では、3個のリミットスイッチ1
7により、ラム4が伸端位置,縮端位置,中間位置にあ
るか否かが検出される。
The position detecting device 14 of the screw actuator according to the present invention is constructed in this way. Then it becomes as follows. With screw actuators,
When the drive screw 3 is normally and reversely driven by the motor 1 via the gear group 2, the ram 4 is screwed with the drive screw 3.
However, it is guided by the cylinder 5 and reciprocates, and is moved forward and backward from the tip end. Therefore, by utilizing such expansion and contraction, it is used for various other purposes such as a jack. Then, in the position detecting device 14 of the screw actuator, the detection screw 15 is provided on the base end side of the drive screw 3 and the bevel gear 1.
The position of the ram 4 is detected by detecting the nut portion 16 which is connected via 8 and which is screwed with the detection screw 15 and reciprocates by the detection means arranged along the movement locus. That is, in the illustrated example, three limit switches 1
7, it is detected whether the ram 4 is at the extended end position, the contracted end position, or the intermediate position.

【0012】そこで、このスクリュウアクチュエータの
位置検出装置14は、次の第1,第2,第3のようにな
る。まず第1に、この種従来例のようにポテンショメー
タ8を用いないので、減速機7を介裝することは不要で
ある(図2の(1)図も参照)。又、位置検出装置14
のリミットスイッチ17等の検知手段は、スクリュウア
クチュエータの駆動スクリュウ3の基端側において、通
常用いられているケース13内に収納されており、この
種従来例のようにシリンダ5の周囲等の外部には何も配
設されないので(図2の(2)図も参照)、特に専用の
防塵,破損対策は不要である。そして、所定のごとく検
出スクリュウ15,ナット部16,リミットスイッチ1
7等の検知手段を設ければよく、構成が簡単である。第
2に、ナット部16の往復動をリミットスイッチ17等
の検知手段にて検知する方式よりなり、この種従来例の
ごとくポテンショメータ8を用いた場合のように(図2
の(1)図参照)、周囲温度変化の影響を受けない。も
って、正確な位置検出が実現される。第3に、この位置
検出装置14、つまりその検出スクリュウ15,ナット
部16,リミットスイッチ17等の検知手段等は、スク
リュウアクチュエータの駆動スクリュウ3の基端側にお
いて、通常用いられているケース13内に収納され、こ
の種従来例のようにスクリュウアクチュエータのラム
4,シリンダ5等の周囲に突起物は何ら配設されない
(図2の(2)図も参照)。もってコンパクトであり、
スクリュウアクチュエータの取り付け,取り扱い等は、
何ら支障なく容易に行われる。
Therefore, the position detecting device 14 for the screw actuator is as follows. First of all, unlike the conventional example of this kind, since the potentiometer 8 is not used, it is not necessary to intervene with the speed reducer 7 (see also FIG. 2 (1)). In addition, the position detection device 14
The limit switch 17 and other detecting means are housed in a normally used case 13 on the base end side of the drive screw 3 of the screw actuator. Since nothing is provided in the device (see also FIG. 2B), it is not necessary to take special measures against dust and damage. Then, the detection screw 15, the nut portion 16, the limit switch 1
It suffices if a detecting means such as 7 is provided, and the configuration is simple. Secondly, the reciprocating movement of the nut portion 16 is detected by a detecting means such as the limit switch 17, and the potentiometer 8 is used as in the conventional example of this kind (see FIG. 2).
(See Figure (1)), it is not affected by ambient temperature changes. Therefore, accurate position detection is realized. Thirdly, the position detecting device 14, that is, the detecting means such as the detecting screw 15, the nut portion 16 and the limit switch 17 is provided in the case 13 which is normally used on the base end side of the driving screw 3 of the screw actuator. No protrusions are arranged around the ram 4, cylinder 5, etc. of the screw actuator as in the conventional example of this kind (see also FIG. 2 (2)). It ’s very compact,
Installation and handling of the screw actuator are
It is easily done without any problems.

【0013】[0013]

【発明の効果】本発明に係るスクリュウアクチュエータ
の位置検出装置は、以上説明したように、駆動スクリュ
ウの基端側に検出スクリュウを連結し、これと螺合し往
復動されるナット部を検知手段で検知するようにしたこ
とにより、次の効果を発揮する。第1に、減速機および
専用の防塵,破損対策等は不要で、構成が簡単でありコ
スト面にも優れている。これと共に第2に、周囲温度の
変化の影響を受けず正確な位置検出が可能であり、検出
精度が高い。更に第3に、ラム,シリンダ等の周囲に突
起物は何ら配設されず、スクリュウアクチュエータの取
り付け,取り扱い等は、何ら支障なく容易に行われ、便
利である。このように、この種従来例に存した問題点が
一挙にすべて一掃される等、本発明の発揮する効果は顕
著にして大なるものがある。
As described above, the position detecting device for the screw actuator according to the present invention has the detecting screw connected to the base end side of the drive screw and screwed with the detecting screw to detect the nut portion. The following effects are exhibited by detecting with. First, there is no need for a speed reducer, a dedicated dustproof, damage countermeasure, etc., and the structure is simple and the cost is excellent. Along with this, secondly, accurate position detection is possible without being affected by changes in ambient temperature, and detection accuracy is high. Thirdly, no protrusions are provided around the ram, cylinder, etc., and the screw actuator can be attached and handled easily without any trouble, which is convenient. As described above, all the problems existing in this type of conventional example are completely eliminated at once, and the effects of the present invention are remarkably large.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係るスクリュウアクチュエータの位置
検出装置の実施例を示す、断面図である。
FIG. 1 is a sectional view showing an embodiment of a position detecting device for a screw actuator according to the present invention.

【図2】従来例に係るスクリュウアクチュエータの位置
検出装置の断面図であり、(1)図はその1の従来例
を、(2)図は他の従来例を示す。
2A and 2B are cross-sectional views of a position detecting device for a screw actuator according to a conventional example, FIG. 1A shows a conventional example of the first example, and FIG. 2B shows another conventional example.

【符号の説明】[Explanation of symbols]

1 モータ 2 歯車群 3 駆動スクリュウ 4 ラム 5 シリンダ 6 位置検出装置(従来例のもの) 7 減速機 8 ポテンショメータ 9 位置検出装置(他の従来例のもの) 10 検出バー 11 検知部 12 リミットスイッチ 13 ケース 14 位置検出装置(本発明のもの) 15 検出スクリュウ 16 ナット部 17 リミットスイッチ(検知手段) 18 かさ歯車 19 保持部材 20 バー 1 motor 2 gear group 3 drive screw 4 ram 5 cylinder 6 position detection device (conventional example) 7 speed reducer 8 potentiometer 9 position detection device (other conventional example) 10 detection bar 11 detection part 12 limit switch 13 case 14 position detection device (of the present invention) 15 detection screw 16 nut part 17 limit switch (detection means) 18 bevel gear 19 holding member 20 bar

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 外側からシリンダ,ラム,駆動スクリュ
ウの順に同軸に配され、該駆動スクリュウの正逆回転駆
動により、該駆動スクリュウと螺合する筒状の該ラム
が、回転不能かつ該シリンダに案内されて往復動可能と
され、先端から外部に進退動するスクリュウアクチュエ
ータにおける該ラムの位置検出装置であって、 該駆動スクリュウの基端側に連結され連動して正逆回転
される検出スクリュウと、該検出スクリュウに螺合され
その正逆回転に伴い回転不能で往復動されるナット部
と、該ナット部の移動軌跡に沿って配され該ナット部を
検知可能な検知手段と、を有してなり、該ナット部は該
ラムの往復動に対応して往復動し、該検知手段は該ナッ
ト部の検知により該ラムの位置を検出すること、を特徴
とするスクリュウアクチュエータの位置検出装置。
1. A cylinder, a ram, and a drive screw are coaxially arranged in this order from the outside, and the cylindrical ram that is screwed with the drive screw is non-rotatable and is attached to the cylinder by forward and reverse rotation drive of the drive screw. A position detecting device for the ram in a screw actuator that is guided and reciprocally movable and that moves forward and backward from the tip, and a detection screw that is connected to the base end side of the drive screw and that rotates forward and backward in conjunction with the detection screw. A nut portion that is screwed into the detection screw and reciprocally moves in a non-rotatable manner when the screw rotates forward and backward, and a detection unit that is arranged along a movement locus of the nut portion and that can detect the nut portion. The nut actuator reciprocates in response to the reciprocal movement of the ram, and the detection means detects the position of the ram by detecting the nut portion. Position detecting device.
JP3308544A 1991-10-28 1991-10-28 Position detecting device of screw actuator Pending JPH05116900A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3308544A JPH05116900A (en) 1991-10-28 1991-10-28 Position detecting device of screw actuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3308544A JPH05116900A (en) 1991-10-28 1991-10-28 Position detecting device of screw actuator

Publications (1)

Publication Number Publication Date
JPH05116900A true JPH05116900A (en) 1993-05-14

Family

ID=17982308

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3308544A Pending JPH05116900A (en) 1991-10-28 1991-10-28 Position detecting device of screw actuator

Country Status (1)

Country Link
JP (1) JPH05116900A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3457091A1 (en) * 2017-09-18 2019-03-20 Ratier-Figeac SAS Actuator position sensor mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3457091A1 (en) * 2017-09-18 2019-03-20 Ratier-Figeac SAS Actuator position sensor mechanism
US10935114B2 (en) 2017-09-18 2021-03-02 Ratier-Figeac Sas Actuator position sensor mechanism

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