JPH03269318A - Rotational positioner - Google Patents
Rotational positionerInfo
- Publication number
- JPH03269318A JPH03269318A JP7150390A JP7150390A JPH03269318A JP H03269318 A JPH03269318 A JP H03269318A JP 7150390 A JP7150390 A JP 7150390A JP 7150390 A JP7150390 A JP 7150390A JP H03269318 A JPH03269318 A JP H03269318A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic path
- magnetic
- forming member
- permanent magnet
- path forming
- 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
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 17
- 239000000057 synthetic resin Substances 0.000 claims abstract description 17
- 239000000696 magnetic material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000005520 cutting process Methods 0.000 abstract description 7
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
【発明の詳細な説明】
〔概要〕
漏洩磁界と回転角度との対応関係を利用した漏洩磁界型
回転ポジショナに関し、
切削加工を不要として製造コストの低廉化を可能とする
ことを目的とし、
永久磁石と該永久磁石と組合わされ磁路を形成する磁性
材料製の磁路形成部材とよりなり閉磁路を形成する閉磁
路構造体と、該閉磁路構造体からの漏洩磁界を検知する
磁気検出器とよりなり、上記閉磁路構造体と磁気検知器
との相対的回動角度位置を検出する回転ポジショナにお
いて、上記閉磁路構造体を、上記磁路形成部材が、実質
上Ｕ字形状で且つ全長に亘って断面形状が実質上同一で
あり、上記磁路形成部材と上記永久磁石とが、該永久磁
石が上記磁路形成部材の両端の間に組み込まれた状態で
成形された成形合成樹脂体により固定された構成とする
。[Detailed Description of the Invention] [Summary] The present invention relates to a leakage magnetic field type rotary positioner that utilizes the correspondence between a leakage magnetic field and a rotation angle, and aims to reduce manufacturing costs by eliminating the need for cutting. and a magnetic path forming member made of a magnetic material that is combined with the permanent magnet to form a magnetic path, and a closed magnetic path structure that forms a closed magnetic path; and a magnetic detector that detects a leakage magnetic field from the closed magnetic path structure. In the rotary positioner for detecting the relative rotational angular position between the closed magnetic path structure and the magnetic detector, the magnetic path forming member is substantially U-shaped and extends over the entire length of the closed magnetic path structure. The cross-sectional shape is substantially the same throughout, and the magnetic path forming member and the permanent magnet are made of a molded synthetic resin body molded with the permanent magnet incorporated between both ends of the magnetic path forming member. Fixed configuration.
本発明は漏洩磁界と回転角度との対応関係を利用した漏
洩磁界型回転ポジショナに関する。The present invention relates to a leakage magnetic field type rotary positioner that utilizes the correspondence between leakage magnetic fields and rotation angles.
この種の回転ポジショナの主要構成部分は閉磁路構造体
である。The main component of this type of rotary positioner is a closed magnetic circuit structure.
この閉磁路構造体は製造が容易な構造であることが望ま
しい。It is desirable that this closed magnetic circuit structure has a structure that is easy to manufacture.
第６図及び第７図は本出願人が先に提案した特開平１−
２４４３１４号に示されている回転ポジショナ１を示す
。Figures 6 and 7 are Japanese Patent Application Laid-Open No. 1999-1-1, which was proposed earlier by the present applicant.
244314 is shown.
各図中、２は閉磁路構造体であり、３は磁気検知器であ
る。In each figure, 2 is a closed magnetic path structure, and 3 is a magnetic detector.
閉磁路構造体２は、非磁性の円盤部材４の環状溝５の周
囲に磁路形成部材６を有し、永久磁石７がブラケット８
により円板部材４に固定されて磁路形成部材６の端部６
ａ、６ｂの間に設けられた構成である。The closed magnetic path structure 2 has a magnetic path forming member 6 around an annular groove 5 of a non-magnetic disk member 4, and a permanent magnet 7 is connected to a bracket 8.
The end portion 6 of the magnetic path forming member 6 is fixed to the disk member 4 by
This is a configuration provided between a and 6b.
永久磁石７を除いた閉磁路構造体２は、第８図に示すよ
うに非磁性円盤１０と磁性粉とバインダとよりなる円盤
状の成形磁性ブロック１１とよりなる複合体１２を二点
鎖線で示すように切削して環状の溝１３を形成し、磁路
形成部材６を残置形成して製造される。As shown in FIG. 8, the closed magnetic circuit structure 2 excluding the permanent magnet 7 has a composite body 12 consisting of a non-magnetic disk 10, a disk-shaped molded magnetic block 11 made of magnetic powder and a binder, indicated by a chain double-dashed line. As shown, it is manufactured by cutting to form an annular groove 13 and leaving the magnetic path forming member 6 behind.
このように、磁路形成部材６は、削り出して形成するも
のであり、その製造コストは高くなり、閉磁路構造体２
は高価となる。In this way, the magnetic path forming member 6 is formed by cutting out, and the manufacturing cost is high, and the closed magnetic path structure 2
is expensive.
本発明は、切削加工を不要として製造コストの低廉化を
可能とした回転ポジショナを提供することを目的とする
。SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary positioner that does not require cutting and can reduce manufacturing costs.
本発明は、永久磁石と該永久磁石と組合わされ磁路を形
成する磁性材料製の磁路形成部材とよりなり閉磁路を形
成する閉磁路構造体と、該閉磁路構造体からの漏洩磁界
を検知する磁気検出器とよりなり、上記閉磁構造体と磁
気検知器との相対的回動角度位置を検出する回転ポジシ
ョナにおいて、上記閉磁路構造体を、上記磁路形成部材
が、実質上Ｕ字形状で且つ全長に亘って断面形状が実質
上同一であり、上記磁路形成部材と上記永久磁石とが、
該永久磁石が上記磁路形成部材の両端の間に組み込まれ
た状態で成形された成形合成樹脂体により固定された構
造としてなる。The present invention provides a closed magnetic path structure that forms a closed magnetic path, which is made up of a permanent magnet and a magnetic path forming member made of a magnetic material that is combined with the permanent magnet to form a magnetic path, and a closed magnetic path structure that prevents leakage magnetic fields from the closed magnetic path structure. In a rotation positioner that includes a magnetic detector and detects a relative rotational angular position between the closed magnetic structure and the magnetic detector, the magnetic path forming member connects the closed magnetic path structure to a substantially U-shaped positioner. The shape and the cross-sectional shape are substantially the same over the entire length, and the magnetic path forming member and the permanent magnet are
The permanent magnet is fixed between both ends of the magnetic path forming member by a molded synthetic resin body.
磁路形成部材と永久磁石とを成形合成樹脂体により一体
化する構造は、切削加工を不要とする。The structure in which the magnetic path forming member and the permanent magnet are integrated using a molded synthetic resin body eliminates the need for cutting.
磁路形成部材が、厚さ及び幅が実質上一定である形状は
、合成樹脂成形によっても磁路形成部材に変形が生じな
い。If the magnetic path forming member has a substantially constant thickness and width, the magnetic path forming member will not be deformed even by synthetic resin molding.
第１図及び第２図は夫々本発明の一実施例の回転ポジシ
ョナ２０を示す。1 and 2 each illustrate a rotary positioner 20 according to an embodiment of the present invention.
２１は閉磁路構造体であり、磁性材料製があり、全長に
亘って幅Ｗ１及び厚さｔｌが等しいＵ字状の磁路形成部
材２２と、この部材２２の両側の端部２２ａ、２２ｂと
の間に配され両端に磁極を有する棒状の永久磁石２３と
が、ホルダ２４上で内周側と外周側とを成形合成樹脂体
２５により囲まれて一体化され、最外周を磁気シールド
部材２６により囲まれた構造である。Reference numeral 21 denotes a closed magnetic path structure, which is made of a magnetic material and includes a U-shaped magnetic path forming member 22 having the same width W1 and thickness tl over the entire length, and end portions 22a and 22b on both sides of this member 22. A rod-shaped permanent magnet 23 disposed between the holder 24 and having magnetic poles at both ends is integrated with the inner circumferential side and outer circumferential side of the holder 24 surrounded by a molded synthetic resin body 25, and the outermost circumference is surrounded by a magnetic shielding member 26. It is a structure surrounded by
この閉磁路構造体２１は、ホルダ２４の中心の軸２７に
より回転可能に支持されている。This closed magnetic circuit structure 21 is rotatably supported by a shaft 27 at the center of the holder 24 .
磁路形成部材２２の円弧部分２２ｃは、上記軸２７を中
心とする円弧２８に一致している。The circular arc portion 22c of the magnetic path forming member 22 corresponds to the circular arc 28 centered on the axis 27.
この円弧部分２２Ｇの内周側に、扇状に、凹部２９が形
成しである。A fan-shaped recess 29 is formed on the inner peripheral side of the arc portion 22G.
３０は磁気検知器３０であり、回転ポジショナ２０の本
体く図示せず）に固定されて設けてあり、上記凹部２９
内に配されている。Reference numeral 30 denotes a magnetic detector 30, which is fixed to the main body of the rotary positioner 20 (not shown), and is provided in the recess 29.
It is placed inside.
Ｕ字状の磁路形成部材２２の端部２２ａ。End portion 22a of U-shaped magnetic path forming member 22.
２２ｂの間の距離１は長く、永久磁石２３はサイズが大
きくなり、ＢＨＩの小さい「ｅ −ＣｒＣＯ製でもよい
。The distance 1 between the magnets 22b is long, and the permanent magnet 23 has a large size, and may be made of e-CrCO with a small BHI.
上記扇状凹部２９には、磁路形成部材２２から漏洩した
磁束による磁界が所定の分布で形成されている。A magnetic field due to magnetic flux leaking from the magnetic path forming member 22 is formed in the fan-shaped recess 29 in a predetermined distribution.
軸２７が回動すると、磁気検知器３０が上記磁界の強さ
の変化を検知し、この出力から軸２７の回動角度が検出
される。When the shaft 27 rotates, the magnetic detector 30 detects a change in the strength of the magnetic field, and the rotation angle of the shaft 27 is detected from this output.
次に、上記閉磁路構造体２１の製造方法について、第３
図を参照して説明する。Next, regarding the manufacturing method of the closed magnetic circuit structure 21, the third
This will be explained with reference to the figures.
第３図に示すように、ホルダ２４上において、Ｕ字状の
磁路形成部材２２の端部２２ａ、２２ｂの間に永久磁石
２３を組み込み、この状態で成形金型（図示せず〉にセ
ットする。As shown in FIG. 3, a permanent magnet 23 is installed between the ends 22a and 22b of the U-shaped magnetic path forming member 22 on the holder 24, and set in a mold (not shown) in this state. do.
この状態で合成樹脂による射出成形を行う。In this state, injection molding using synthetic resin is performed.
これにより、第４図に示すように、磁路形成部材２２と
永久磁石２３とが内周側及び外周側より成形合成樹脂体
２５により固定された状態とされる。As a result, as shown in FIG. 4, the magnetic path forming member 22 and the permanent magnet 23 are fixed by the molded synthetic resin body 25 from the inner and outer circumferential sides.
この後、磁気シールド部材２６を組み付けて、閉磁路構
造体２１ば完成する。Thereafter, the magnetic shield member 26 is assembled, and the closed magnetic circuit structure 21 is completed.
ここで、上記の成形合成樹脂体２５が凝固する過程で、
磁路形成部材２２及び永久磁石２３にこれを変形させる
力を作用させる。特に磁路形成部材２２がこの力により
変形され易い。これが部分的に変形すると、凹部２９内
の漏洩磁界の分布が変化し、ひいては、回転ポジショナ
２０の回動角度検出精度に悪影響を及ぼす。Here, in the process of solidifying the molded synthetic resin body 25,
A force is applied to the magnetic path forming member 22 and the permanent magnet 23 to deform them. In particular, the magnetic path forming member 22 is easily deformed by this force. If this partially deforms, the distribution of the leakage magnetic field within the recess 29 changes, which in turn adversely affects the rotation angle detection accuracy of the rotary positioner 20.
しかし、上記実施例では、磁路形成部材２２は全長に亘
って同一断面あり、特に強度的に弱い部分はなく、磁路
形成部材２２に部分的な変形は起きない。従って、回転
ポジショナ２０の回動角度検出精度は何ら損なわれない
。However, in the above embodiment, the magnetic path forming member 22 has the same cross section over its entire length, and there is no particularly weak part in terms of strength, so that the magnetic path forming member 22 does not undergo partial deformation. Therefore, the rotational angle detection accuracy of the rotational positioner 20 is not impaired in any way.
また、Ｕ字状の磁路形成部材２２を鉄系粉末とエポキシ
樹脂との混合体を成形して製造することもできる。Further, the U-shaped magnetic path forming member 22 can also be manufactured by molding a mixture of iron-based powder and epoxy resin.
この場合には、最初に成形により磁路形成部材２２を形
成し、これに永久磁石２３を組み付け、この後合成樹脂
により成形して、成形合成樹脂体２５を形成する手順で
製造される。In this case, the magnetic path forming member 22 is first formed by molding, the permanent magnet 23 is assembled thereto, and then the molded synthetic resin body 25 is formed by molding with synthetic resin.
第５図は本発明の別の実施例の回転ポジショナ４０を示
す。FIG. 5 shows a rotary positioner 40 of another embodiment of the invention.
この回転ポジショナ４０は、扇状凹部２９Ａを閉磁路構
造体２１Ａの外側に設けた構造である。This rotary positioner 40 has a structure in which a fan-shaped recess 29A is provided outside a closed magnetic path structure 21A.
第５図中、第２図に示す構成部分と実質上対応する部分
には、添字Ａを付した同一符号を付しその説明は省略す
る。In FIG. 5, parts that substantially correspond to those shown in FIG. 2 are designated by the same reference numerals with the suffix A, and their explanations will be omitted.
この閉磁路構造体２１Ａも、前記実施例１の閉磁路構造
体２１の場合と同様に、Ｕ字状の磁路形成部材２２Ａと
永久磁石２３Ａとを組み合わせた状態で合成樹脂により
一体化される。Similar to the closed magnetic path structure 21 of Example 1, this closed magnetic path structure 21A is also a combination of a U-shaped magnetic path forming member 22A and a permanent magnet 23A, which are integrated using synthetic resin. .
以上説明した様に、本発明によれば、閉磁路構造体は、
切削加工を不要として製造しつる構成であるため、回転
ポジショナの製造コストの低下を図ることが出来る。As explained above, according to the present invention, the closed magnetic path structure is
Since the rotary positioner is manufactured without the need for cutting and has a hanging configuration, it is possible to reduce the manufacturing cost of the rotary positioner.
第１図は本発明の一実施例の回転ボジシコナの斜視図、
第２図は第１図の回転ポジショナの平面図、第３図はＵ
字状磁路形成部材への棒状の永久磁石の組み込みを説明
する図、
第４図は成形合成樹脂体による磁路形成部材と永久磁石
との固定を説明する図、
第５図は本発明の別の実施例の回転ポジショナの平面図
、
第６図は従来の回転ポジショナの１例を示す図、第７図
は第６図中Ｖｌｌ−Ｖｌ線に沿う断面図、第８図は第６
図中の閉磁路構造体の製造を説明する図である。
図において、
２０．４０は回転ボジシ」す、
２１は閉磁路ｔＩ４造休１
之２はＵ字状の磁路形成部材、
２２ａ、２２ｂは端部、
２２ｃは円弧部分、
２３は永久磁石、
２４はホルダ、
２５は成形合成樹脂体、
２６は磁気シールド部材、
２７は軸、
２８は円弧、
２９は扇状凹部、
３０は磁気検知器
を示す。FIG. 1 is a perspective view of a rotating positioner according to an embodiment of the present invention, FIG. 2 is a plan view of the rotating positioner of FIG. 1, and FIG. 3 is a U
FIG. 4 is a diagram illustrating the fixing of the permanent magnet to the magnetic path forming member by a molded synthetic resin body. FIG. FIG. 6 is a plan view of a rotary positioner according to another embodiment; FIG. 6 is a diagram showing an example of a conventional rotary positioner; FIG. 7 is a sectional view taken along the line Vll-Vl in FIG.
It is a figure explaining manufacture of the closed magnetic circuit structure in a figure. In the figure, 20.40 is a rotating position, 21 is a closed magnetic path, 2 is a U-shaped magnetic path forming member, 22a, 22b are ends, 22c is an arc portion, 23 is a permanent magnet, 24 25 is a molded synthetic resin body, 26 is a magnetic shielding member, 27 is a shaft, 28 is an arc, 29 is a fan-shaped recess, and 30 is a magnetic detector.
Claims (1)
材料製の磁路形成部材とよりなり閉磁路を形成する閉磁
路構造体と、該閉磁路構造体からの漏洩磁界を検知する
磁気検出器とよりなり、上記閉磁路構造体と磁気検知器
との相対的回動角度位置を検出する回転ポジショナにお
いて、 上記閉磁路構造体（２１）を、上記磁路形成部材（２２
）が、実質上Ｕ字形状で且つ全長に亘って断面形状が実
質上同一であり、上記磁路形成部材（２２）と上記永久
磁石（２３）とが、該永久磁石（２３）が上記磁路形成
部材（２２）の両端（２２ａ、２２ｂ）の間に組み込ま
れた状態で成形された成形合成樹脂体（２５）により固
定された構造としてなることを特徴とする回転ポジシヨ
ナ。[Scope of Claims] A closed magnetic path structure that forms a closed magnetic path including a permanent magnet and a magnetic path forming member made of a magnetic material that is combined with the permanent magnet to form a magnetic path, and leakage from the closed magnetic path structure. In a rotary positioner that includes a magnetic detector that detects a magnetic field and detects a relative rotation angle position between the closed magnetic path structure and the magnetic detector, the closed magnetic path structure (21) is connected to the magnetic path forming member. (22
) is substantially U-shaped and has substantially the same cross-sectional shape over its entire length, and the magnetic path forming member (22) and the permanent magnet (23) are arranged so that the permanent magnet (23) is A rotary positioner characterized in that it has a structure fixed by a molded synthetic resin body (25) that is molded while being assembled between both ends (22a, 22b) of a path forming member (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7150390A JPH03269318A (en) | 1990-03-20 | 1990-03-20 | Rotational positioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7150390A JPH03269318A (en) | 1990-03-20 | 1990-03-20 | Rotational positioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03269318A true JPH03269318A (en) | 1991-11-29 |
Family
ID=13462547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7150390A Pending JPH03269318A (en) | 1990-03-20 | 1990-03-20 | Rotational positioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03269318A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007041001A (en) * | 2005-08-02 | 2007-02-15 | Siemens Vdo Automotive Corp | Noncontact hall effect angle position sensor |
| JP2013500484A (en) * | 2009-07-28 | 2013-01-07 | マーレ インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング | Position sensor and linear actuator |
-
1990
- 1990-03-20 JP JP7150390A patent/JPH03269318A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007041001A (en) * | 2005-08-02 | 2007-02-15 | Siemens Vdo Automotive Corp | Noncontact hall effect angle position sensor |
| JP2013500484A (en) * | 2009-07-28 | 2013-01-07 | マーレ インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング | Position sensor and linear actuator |
| US9057628B2 (en) | 2009-07-28 | 2015-06-16 | Mahle International Gmbh | Position sensor and linear actuator |
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