JPH023702A - Detector for piston position of hydraulic cylinder - Google Patents
Detector for piston position of hydraulic cylinderInfo
- Publication number
- JPH023702A JPH023702A JP28809287A JP28809287A JPH023702A JP H023702 A JPH023702 A JP H023702A JP 28809287 A JP28809287 A JP 28809287A JP 28809287 A JP28809287 A JP 28809287A JP H023702 A JPH023702 A JP H023702A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder tube
- guide member
- onto
- position detection
- piston
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract 2
- 239000000696 magnetic material Substances 0.000 claims description 8
- 239000011810 insulating material Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 230000005389 magnetism Effects 0.000 claims description 2
- 230000004044 response Effects 0.000 claims description 2
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 235000014676 Phragmites communis Nutrition 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000032261 response to magnetism Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2892—Means for indicating the position, e.g. end of stroke characterised by the attachment means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Actuator (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、油圧シリンダ、エアーシリンダ等の流体圧シ
リンダのピストン位置をシリンダチューブの外側から検
出する装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for detecting the piston position of a fluid pressure cylinder such as a hydraulic cylinder or an air cylinder from the outside of a cylinder tube.
従来の技術及び発明が解決しようとする問題点従来、シ
リンダチューブを非磁性材料製にしてその中を摺動する
ピストンの外周に永久磁石を取付けるとともに、シリン
ダチューブの外周の任意の位置にリードスイッチや磁気
抵抗素子等の磁気に感応して電気信号を発する磁気セン
サを内蔵した位置検出体を取付けて、ピストンの接近を
検出するようにしたピストン位置検出装置は公知である
が、その位置検出子をバンドまたは特殊な金具によって
シリンダチューブの外周に直に締め付けるようになって
いたため、位置検出子が移動しないように強く締め付け
ると、その締付力により位置検出子が破損することがあ
り、また、油圧シリンダでは作動油の温度が１００〜２
００℃程度に上昇することがあるが、このような場合に
、磁気センサが高温にさらされて検出精度が低下する欠
点があった。Conventional technology and problems to be solved by the invention Conventionally, a cylinder tube is made of a non-magnetic material, a permanent magnet is attached to the outer circumference of a piston that slides inside the cylinder tube, and a reed switch is installed at an arbitrary position on the outer circumference of the cylinder tube. There is a known piston position detection device that detects the approach of a piston by installing a position detection body equipped with a built-in magnetic sensor that emits an electric signal in response to magnetism, such as a magnetoresistive element. was designed to be tightened directly to the outer periphery of the cylinder tube with a band or special metal fittings, so if the position detector was tightened too strongly to prevent it from moving, the tightening force could damage the position detector. In a hydraulic cylinder, the temperature of the hydraulic oil is 100 to 2.
In such cases, the magnetic sensor is exposed to high temperatures, resulting in a decrease in detection accuracy.
問題点を解決するための手綬
本発明はこのような問題点を解決するための手段として
、シリンダチューブを非磁性材料製とし、そのシリンダ
チューブ内を摺動するピストンに永久磁石を固着すると
とともに、シリンダチューブの外周にそのシリンダチュ
ーブの軸方向と平行な非磁性材料製の案内部材を固設し
、永久磁石の磁気に感応して電気信号を発する磁気セン
サを内蔵した位置検出子を案内部材の任意の位置に固定
する構成とした。As a means for solving the above problems, the present invention provides a cylinder tube made of a non-magnetic material, a permanent magnet fixed to a piston sliding inside the cylinder tube, and a permanent magnet fixed to a piston sliding inside the cylinder tube. A guide member made of a non-magnetic material is fixed on the outer circumference of the cylinder tube in parallel with the axial direction of the cylinder tube, and a position detector equipped with a built-in magnetic sensor that emits an electric signal in response to the magnetism of a permanent magnet is installed in the guide member. The structure is such that it can be fixed at any position.
発明の作用及び効果
本発明は上記構成になり、位置検出子をバンド等によっ
てシリンダチューブに直に締め付けるのではなく、シリ
ンダチューブに固設した案内部材に固定する構成とした
から、ねじ止め等の手段によって位置検出子に大きな力
を作用させずにしっかりと固定することができ、また、
固定位置の調節を容易に行なうことができるとともに、
案内部材をシリンダチューブから離間させて固設するこ
とによりシリンダデユープから位置検出子への熱の伝達
を阻止することができて、温度による検出精度の低下を
回避することができる効果がある。Functions and Effects of the Invention The present invention has the above-mentioned configuration, and the position detector is not directly fastened to the cylinder tube with a band or the like, but is fixed to a guide member fixed to the cylinder tube, so that it is easy to use screws, etc. By means of this method, it is possible to securely fix the position detector without applying a large force to it, and
The fixed position can be easily adjusted, and
By fixing the guide member apart from the cylinder tube, it is possible to prevent heat from being transferred from the cylinder duplex to the position detector, thereby making it possible to avoid a decrease in detection accuracy due to temperature.
実施例 以下、本発明の一実施例を添付図面に基いて説明する。Example An embodiment of the present invention will be described below with reference to the accompanying drawings.
図において、■は油圧シリンダであって、アルミニウム
、非磁性ステンレス等の非磁性材料製のシリンダデユー
プｚ内に同じく非磁性材料からなる２枚の円板４を重ね
てその間にリング形の永久磁石５を挾んだピストン３が
、緊密、かつ、摺動自由に嵌入されてピストンロッド６
の端部に形成したねじ部７に嵌着され、そのねじ部７に
螺着されたナツト８．８によりピストンロッド６に締め
付けられ、シリンダチューブ２の一端に、ボート１１の
形成されたヘッドカバー９が、他端にボー）１２の形成
されたロッドカバーｌＯが、夫々、被着されて４本のタ
イロッド１３により結合されており、ピストンロッド６
はロッドカバー１０の中心孔■４を緊密に貫通している
。In the figure, ■ is a hydraulic cylinder, in which two discs 4 also made of non-magnetic material are stacked in a cylinder duplex z made of non-magnetic material such as aluminum or non-magnetic stainless steel, and a ring-shaped permanent magnet 5 is placed between them. The piston 3 holding the piston 3 is tightly and slidably fitted into the piston rod 6.
A head cover 9 with a boat 11 formed on one end of the cylinder tube 2 is fitted onto a threaded part 7 formed at the end of the cylinder tube 2 and tightened to the piston rod 6 by a nut 8.8 screwed onto the threaded part 7. A rod cover 10 having a bow 12 formed on the other end is respectively attached and connected by four tie rods 13, and the piston rod 6
passes through the center hole 4 of the rod cover 10 tightly.
この油圧シリンダｌのへラドカバー９とロッドカバー１
０の上縁には互いに対応する位置に取付ｉ拷１５．１５
が形成され、その取付溝１５．１５に、内部が拡幅した
案内溝１７の形成された非磁性材料からなる長尺の案内
部材１６がシリンダチューブ２との間に隙間を空けて差
し渡されて嵌着され、皿小ねじ１８により固定されてお
り、この案内部材１６とシリンダチューブ２の間及び、
ヘッドカバー９とロッドカバー１０の間には断熱材１９
が介装されていて、この案内部材！６には２個の位置検
出子２０が任意の位置に固定されるようになっている。Helad cover 9 and rod cover 1 of this hydraulic cylinder l
Attached to the upper edge of 0 in corresponding positions 15.15
is formed, and a long guide member 16 made of a non-magnetic material and having a guide groove 17 whose inside is widened is inserted into the mounting groove 15.15 with a gap between the guide member 16 and the cylinder tube 2. It is fitted and fixed with a countersunk head screw 18, and between this guide member 16 and the cylinder tube 2,
A heat insulating material 19 is provided between the head cover 9 and the rod cover 10.
This guide member is interposed! 6, two position detectors 20 are fixed at arbitrary positions.
位置検出子２０は、第３図に拡大して示すように、合成
樹脂製のケース２１内に、リードスイッチや磁気抵抗素
子等の磁気センサ２３、発光ダイオード２４及び制御装
置２５．２６がこれらを取付けた基板２２とともに収容
され、発光ダイオード２４の頂部がケース２１の上面に
突出し、基板２２に接続されたリード線２８がケース２
１の外に引き出されており、ケース２Ｉ内の隙間には合
成樹脂２７が注入されている。ケース２Ｍの上面には案
内部材１６の案内溝１７°の開口部１７ａに略緊密に嵌
合する突部２１ａが形成され、その中央部の内面には四
角形の凹部２１ｃを有するボス２１ｂが形成され、四角
形の頭部３１を四部２１Ｃに嵌合して回転の阻止された
ボルト３０がケース２１ｃの突部２１ａの上方へ突出し
ている。As shown in an enlarged view in FIG. 3, the position detector 20 includes a magnetic sensor 23 such as a reed switch or a magnetoresistive element, a light emitting diode 24, and control devices 25 and 26 in a case 21 made of synthetic resin. The light emitting diode 24 is housed together with the attached board 22, and the top of the light emitting diode 24 protrudes from the top surface of the case 21, and the lead wire 28 connected to the board 22 is connected to the case 2.
1, and a synthetic resin 27 is injected into the gap inside the case 2I. A protrusion 21a is formed on the upper surface of the case 2M to fit substantially tightly into the opening 17a of the guide groove 17 of the guide member 16, and a boss 21b having a rectangular recess 21c is formed on the inner surface of the central portion thereof. The bolt 30 whose rotation is prevented by fitting the square head 31 into the four parts 21C projects above the protrusion 21a of the case 21c.
この位置検出子２０は案内部材１６の案内溝！７に端部
から挿入され、ケース２１の突部２１ａが案内溝１７の
開口部１７ａに嵌合し、その上面に植設されたボルト３
０が開口部１７ａから案内部材」６の上方へ突出し、そ
の突出部に、案内部材１６の」二面に当たる座金３２が
嵌装され、その所望の位置で蝶ナツト３３を締め付ける
と、座金３２とケース２Ｉの間で案内部材１６の開口部
Ｉ７ａの両側縁を挾んで固定され、リード線２８は案内
溝１７内を通ってその一端の開口から引き出される。This position detector 20 is a guide groove of the guide member 16! 7 from the end, the protrusion 21a of the case 21 fits into the opening 17a of the guide groove 17, and the bolt 3 is implanted in the upper surface of the guide groove 17.
0 protrudes above the guide member 6 from the opening 17a, and a washer 32 that corresponds to the two sides of the guide member 16 is fitted into the protrusion, and when the wing nut 33 is tightened at the desired position, the washer 32 and The guide member 16 is fixed between the cases 2I by sandwiching both side edges of the opening I7a, and the lead wire 28 passes through the guide groove 17 and is drawn out from the opening at one end thereof.
本実施例のピストン位置検出装置は上記構成になり、ピ
ストン３の移動により、これに固着した永久磁石５が位
置検出子２０の磁気センサ２３の直下に対応すると、こ
の磁気センサ２３がリードスイッチである場合には永久
磁石５の磁力により接点が接触し、また、磁気抵抗素子
である場合には電気抵抗が変化して、制御装置２５．２
６から検出信号が発され、その信号がリード線２８を経
て図示しないリレーや他のアクチュエータの駆動回路に
入れされてこれらが作動すると同時に発光ダイオード２
４が点灯するようになっている。The piston position detection device of this embodiment has the above configuration, and when the permanent magnet 5 fixed to the piston 3 moves directly below the magnetic sensor 23 of the position detector 20, this magnetic sensor 23 is activated by a reed switch. In some cases, the contacts come into contact due to the magnetic force of the permanent magnet 5, and in the case of magnetoresistive elements, the electrical resistance changes and the control device 25.2
A detection signal is emitted from the light emitting diode 2, and the signal is sent to a drive circuit for a relay or other actuator (not shown) through a lead wire 28, and at the same time when these actuate, the light emitting diode 2
4 is now lit.
本実施例においては、案内部材１６の案内溝１７内に位
置検出子２０を嵌入し、そのケース２菫に植設したボル
ト３０に蝶ナツト３３を螺合したから、蝶ナツト３３を
緩めることにより位置検出子２０を案内部材１６に沿っ
て自由に移動して位置を調節することができ、蝶ナツト
３３を締め付けるだけで容易にその位置に固定すること
が可能であり、また、その締付力はケース２１の上面の
突部２１ａに作用するだけであって位置検出子２０の全
体を挟圧するようには作用しないから、その締付力によ
り位置検出子２０が破損するおそれがなく、さらに、案
内部材Ｉ６とシリンダチューブ２及びヘッドカバー９と
ロッドカバー１０との間に断熱材！９を介装したから、
シリンダチューブ２内の作動油の温度が上昇し、シリン
ダチューブ２及び両力バー９．１０が加熱されても位置
検出子２０の温度上昇が抑制されて磁気センサ２３の精
度低下が防止され、さらにまた、リード線２８を案内ｉ
ｉ’１ｌ１７内に通すようにしたから配線が容易である
等の利点がある。In this embodiment, the position detector 20 is fitted into the guide groove 17 of the guide member 16, and the wing nut 33 is screwed onto the bolt 30 implanted in the case 2. The position detector 20 can be freely moved along the guide member 16 to adjust its position, and can be easily fixed at that position simply by tightening the wing nut 33, and the tightening force acts only on the protrusion 21a on the top surface of the case 21 and does not act to pinch the entire position detector 20, so there is no risk of the position detector 20 being damaged by the tightening force, and further, Insulating material between guide member I6 and cylinder tube 2, head cover 9 and rod cover 10! Because I inserted 9,
Even if the temperature of the hydraulic oil in the cylinder tube 2 rises and the cylinder tube 2 and the double force bar 9.10 are heated, the rise in temperature of the position detector 20 is suppressed, preventing a decrease in the accuracy of the magnetic sensor 23, and further In addition, the lead wire 28 is guided i.
Since it passes through i'1l17, there are advantages such as easy wiring.
第１図は本発明の一実施例の断面図、第２図は分解斜視
図、第３図は検出子の拡大断面図である。FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is an exploded perspective view, and FIG. 3 is an enlarged sectional view of a detector.
ｌ：油圧シリンダ ２ニジリンダチユーブ ３：ピスト
ン ５：永久磁石 ６：ピストンロッド ９：へッドカ
パ−ｌＯ：口ッドカバ−１５：取付溝 １６二案内部材
１７：案内府Ｉ９：断熱材 ２０：位置検出子 ２１
：ケース ２２：基板 ２３：磁気センサ ２４：発光
ダイオード ２８：リード線 ３０：ボルト３２：座金
３３＝蝶ナツト
出願人 シーケーデイコントロールズ株式会社出願人日
本空圧システム株式会社l: Hydraulic cylinder 2 cylinder tube 3: Piston 5: Permanent magnet 6: Piston rod 9: Head cover lO: Mouth cover 15: Mounting groove 16 Two guide members 17: Guide hole I9: Heat insulating material 20: Position detector 21
: Case 22: Board 23: Magnetic sensor 24: Light emitting diode 28: Lead wire 30: Bolt 32: Washer 33 = Butterfly nut Applicant: CKD Controls Co., Ltd. Applicant: Japan Air Pressure System Co., Ltd.
Claims (1)
チューブ内を摺動するピストンに永久磁石を固着すると
とともに、前記シリンダチューブの外周に該シリンダチ
ューブの軸方向と平行な非磁性材料製の案内部材を固設
し、前記永久磁石の磁気に感応して電気信号を発する磁
気センサを内蔵した位置検出子を前記案内部材の任意の
位置に固定する構成としたことを特徴とする流体圧シリ
ンダのピストン位置検出装置 ２ 前記案内部材が前記シリンダチューブの両端に固着
されたベッドカバーとロッドカバーの間に差し渡されて
いて、前記案内部材と前記シリンダチューブとの間に断
熱材が介設されていることを特徴とする特許請求の範囲
第１項記載の流体圧シリンダのピストン位置検出装置[Claims] 1. The cylinder tube is made of a non-magnetic material, a permanent magnet is fixed to a piston sliding inside the cylinder tube, and a non-magnetic material is attached to the outer periphery of the cylinder tube parallel to the axial direction of the cylinder tube. The present invention is characterized in that a guide member made of material is fixedly installed, and a position detector having a built-in magnetic sensor that emits an electric signal in response to the magnetism of the permanent magnet is fixed at an arbitrary position on the guide member. Fluid pressure cylinder piston position detection device 2 The guide member is placed between a bed cover and a rod cover fixed to both ends of the cylinder tube, and a heat insulating material is provided between the guide member and the cylinder tube. A piston position detecting device for a fluid pressure cylinder according to claim 1, characterized in that the piston position detecting device is interposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62288092A JP2616783B2 (en) | 1987-11-13 | 1987-11-13 | Hydraulic cylinder piston position detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62288092A JP2616783B2 (en) | 1987-11-13 | 1987-11-13 | Hydraulic cylinder piston position detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH023702A true JPH023702A (en) | 1990-01-09 |
| JP2616783B2 JP2616783B2 (en) | 1997-06-04 |
Family
ID=17725687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62288092A Expired - Lifetime JP2616783B2 (en) | 1987-11-13 | 1987-11-13 | Hydraulic cylinder piston position detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2616783B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03125904U (en) * | 1990-03-30 | 1991-12-19 | ||
| JPH0463803U (en) * | 1990-10-13 | 1992-05-29 | ||
| JPH0522810U (en) * | 1991-09-04 | 1993-03-26 | エスエムシー株式会社 | Cylinder with sensor mounting mechanism |
| KR100706632B1 (en) * | 2005-03-04 | 2007-04-12 | 에스엠시 가부시키가이샤 | Actuator with position detecting mechanism |
| JP2008180238A (en) * | 2007-01-23 | 2008-08-07 | Aisin Sangyo Kk | Rotary actuator |
| JP2010071988A (en) * | 2008-09-18 | 2010-04-02 | Sick Ag | Magnetic or inductive waypoint sensor |
| CN103836024A (en) * | 2014-03-19 | 2014-06-04 | 太原科技大学 | Hollow hydraulic cylinder with built-in sensor |
| CN108506280A (en) * | 2018-04-24 | 2018-09-07 | 孝感鑫财智能科技有限公司 | A kind of hydraulic cylinder device whether exceeding safe handling threshold value by detecting hydraulic cylinder temperature |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101122310B1 (en) | 2007-02-26 | 2012-03-21 | 가부시키가이샤후지쿠라 | Magnetic sensor module and piston position detecting device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5724305U (en) * | 1980-07-16 | 1982-02-08 | ||
| JPS61149805U (en) * | 1985-03-11 | 1986-09-16 |
-
1987
- 1987-11-13 JP JP62288092A patent/JP2616783B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5724305U (en) * | 1980-07-16 | 1982-02-08 | ||
| JPS61149805U (en) * | 1985-03-11 | 1986-09-16 |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03125904U (en) * | 1990-03-30 | 1991-12-19 | ||
| JPH0463803U (en) * | 1990-10-13 | 1992-05-29 | ||
| JPH0522810U (en) * | 1991-09-04 | 1993-03-26 | エスエムシー株式会社 | Cylinder with sensor mounting mechanism |
| KR100706632B1 (en) * | 2005-03-04 | 2007-04-12 | 에스엠시 가부시키가이샤 | Actuator with position detecting mechanism |
| JP2008180238A (en) * | 2007-01-23 | 2008-08-07 | Aisin Sangyo Kk | Rotary actuator |
| JP2010071988A (en) * | 2008-09-18 | 2010-04-02 | Sick Ag | Magnetic or inductive waypoint sensor |
| CN103836024A (en) * | 2014-03-19 | 2014-06-04 | 太原科技大学 | Hollow hydraulic cylinder with built-in sensor |
| CN103836024B (en) * | 2014-03-19 | 2016-08-24 | 太原科技大学 | The hollow hydraulic cylinder of built-in sensors |
| CN108506280A (en) * | 2018-04-24 | 2018-09-07 | 孝感鑫财智能科技有限公司 | A kind of hydraulic cylinder device whether exceeding safe handling threshold value by detecting hydraulic cylinder temperature |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2616783B2 (en) | 1997-06-04 |
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