JPS62234768A - Magnetic rotating body - Google Patents
Magnetic rotating bodyInfo
- Publication number
- JPS62234768A JPS62234768A JP7741486A JP7741486A JPS62234768A JP S62234768 A JPS62234768 A JP S62234768A JP 7741486 A JP7741486 A JP 7741486A JP 7741486 A JP7741486 A JP 7741486A JP S62234768 A JPS62234768 A JP S62234768A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- rotating body
- magnetic rotating
- groove
- body according
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 81
- 239000000126 substance Substances 0.000 claims abstract description 10
- 239000000696 magnetic material Substances 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims 2
- 239000010959 steel Substances 0.000 claims 2
- 238000001746 injection moulding Methods 0.000 claims 1
- 238000004663 powder metallurgy Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000005011 phenolic resin Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Regulating Braking Force (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、自動車のアンチロックブレーキシステムな
どに用いられる磁性回転体に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic rotating body used in anti-lock brake systems of automobiles.
［従来の技術］
自動車のアンチロックブレーキシステムには、車軸の回
転数を検知しパルス信号を発生するため、パルサギヤあ
るいはセンサロータなどと称せられるギヤ形状の磁性回
転体が用いられている。[Prior Art] An anti-lock brake system for an automobile uses a gear-shaped magnetic rotating body called a pulser gear or sensor rotor to detect the rotational speed of an axle and generate a pulse signal.
この磁性回転体の作用について説明するため、磁性回転
体と磁界センサの概略構成図を第４図に示す。第４図に
示す磁性回転体７は、従来の磁性回転体を示している。In order to explain the action of this magnetic rotating body, a schematic configuration diagram of the magnetic rotating body and the magnetic field sensor is shown in FIG. The magnetic rotating body 7 shown in FIG. 4 is a conventional magnetic rotating body.
該磁性回転体７の周面上には、磁性を有する複数の凸部
１が一定間隔をおいて設けられている。隣り合う該凸部
１の間には、溝２か形成されている。磁界センサ５は、
磁性回転体７の周面近傍で、凸部１の磁界の影響を受け
る位置に設置されている。A plurality of magnetic protrusions 1 are provided on the circumferential surface of the magnetic rotating body 7 at regular intervals. A groove 2 is formed between the adjacent convex portions 1. The magnetic field sensor 5 is
It is installed near the circumferential surface of the magnetic rotating body 7 at a position where it is affected by the magnetic field of the convex portion 1 .
磁性回転体７は、車軸に接続されており、車軸の回転と
ともに回転する。この磁性回転体７の回転により、凸部
１は、矢印で示すように、周面に沿って円運動するよう
に回転する。一方磁界センサ５は固定されており、該磁
界センサ５に凸部１が最も近づいた状態において、磁界
センサ５には最も強い磁界が働く。この状態から、凸部
１が遠ざかり溝２が近づくにつれて、磁界センサ５に与
えられる磁界は徐々に弱まる。溝２が磁界センサ５に最
も接近した状態において、磁界センサ５に与えられる磁
界は最も弱められる。この状態からさらに回転し隣接す
る他方の凸部１が近づくにつれて、再び磁界センサ５に
与えられる磁界が強められる。The magnetic rotating body 7 is connected to the axle and rotates as the axle rotates. Due to the rotation of the magnetic rotating body 7, the convex portion 1 rotates in a circular motion along the circumferential surface as shown by the arrow. On the other hand, the magnetic field sensor 5 is fixed, and when the protrusion 1 is closest to the magnetic field sensor 5, the strongest magnetic field acts on the magnetic field sensor 5. From this state, as the convex portion 1 moves away and the groove 2 approaches, the magnetic field applied to the magnetic field sensor 5 gradually weakens. When the groove 2 is closest to the magnetic field sensor 5, the magnetic field applied to the magnetic field sensor 5 is weakened the most. As the protrusion 1 rotates further from this state and approaches the other adjacent protrusion 1, the magnetic field applied to the magnetic field sensor 5 is strengthened again.
以上のようにして、磁界センサ５に与えられる磁界が変
化し、該磁界センサ５内では交流電流のサイン波信号が
発生する。このようにして発生したサイン波信号を成形
回路によりパルス信号に変換し、アンチロックブレーキ
システムの制御信号とする。As described above, the magnetic field applied to the magnetic field sensor 5 changes, and a sine wave signal of alternating current is generated within the magnetic field sensor 5. The sine wave signal thus generated is converted into a pulse signal by a shaping circuit and used as a control signal for the anti-lock brake system.
ところで、このような作用を示す磁性回転体の使用され
る環境は、土砂や水がかかり、腐食されやすく傷つけら
れやすい環境である。したがって、耐食性を高める必要
があり、材質としてステンレス鋼材を用い切削加工した
り、あるいは鉄系の材質に亜鉛めっきやニッケルめっき
等の表面処理を施したりすることにより製造されている
。By the way, the environment in which a magnetic rotating body exhibiting such an effect is used is an environment where it is exposed to dirt and water, and is easily corroded and damaged. Therefore, it is necessary to improve corrosion resistance, and they are manufactured by cutting stainless steel or by subjecting iron-based materials to surface treatment such as zinc plating or nickel plating.
［発明が解決しようとする問題点〕
しかしながら、このような従来の磁性回転体では、凸部
の間の溝に水分や他の部品の錆びた液等が溜まり腐食が
促進されるため、充分な耐食性が得られなかった。また
、小石等が溝に食い込んで凸部を傷つけたり、表面処理
の膜を剥がしたりする場合もあった。さらに、このよう
な従来の磁性回転体はコストが高くつくという問題もあ
った。[Problems to be solved by the invention] However, in such conventional magnetic rotating bodies, moisture and rusted liquid from other parts accumulate in the grooves between the convex parts, accelerating corrosion. Corrosion resistance could not be obtained. In addition, there have been cases where pebbles or the like dig into the grooves and damage the convex portions or peel off the surface treatment film. Furthermore, there is a problem in that such conventional magnetic rotating bodies are expensive.
これに対処するため、磁性回転体に泥避はガードを付け
たり、あるいは車輪の内に磁性回転体を組み込むなどの
方法が考えられるが、部品の形状や機構が複雑となるた
め、さらにコストが高まるという問題がある。To deal with this, methods such as attaching a mud guard to the magnetic rotating body or incorporating the magnetic rotating body inside the wheel are considered, but the shapes and mechanisms of the parts are complicated, which increases the cost. There is a problem of increasing
それゆえに、この発明の目的は、簡易な構造で耐食性が
改善された磁性回転体を提供することにある。Therefore, an object of the present invention is to provide a magnetic rotating body with a simple structure and improved corrosion resistance.
［問題点を解決するための手段］
この発明の磁性回転体では、少なくとも隣り合う凸部の
間で形成される溝の表面部分を非磁性物質で覆っている
。[Means for Solving the Problems] In the magnetic rotating body of the present invention, at least the surface portion of the groove formed between adjacent convex portions is covered with a non-magnetic material.
［作用コ
この発明の磁性回転体は、溝の表面部分が非磁性物質で
覆われているため、水分や他の部品の錆びた液等が直接
溝の表面部分に接することはない。[Operation] In the magnetic rotating body of the present invention, the surface portion of the groove is covered with a non-magnetic material, so that moisture, rusted liquid from other parts, etc. do not come into direct contact with the surface portion of the groove.
また、小石等による傷の発生も、この非磁性物質の波膜
より有効に防ぐことができる。Furthermore, scratches caused by pebbles and the like can be effectively prevented by using the wave film made of this non-magnetic material.
さらに非磁性物質であるため、凸部の磁性にほとんど影
響を当ることがない。Furthermore, since it is a non-magnetic material, it hardly affects the magnetism of the convex portion.
［実施例］
第１図は、この発明の一実施例を示す正面図である。磁
性回転体４の周面上には、一定の間隔をおいて複数の凸
部１が設けられている。隣り合う凸部１の間には、溝２
が形成されている。該溝２を埋めるように、非磁性物質
３が設けられており、該非磁性物質３により溝２の表面
部分が覆われている。[Embodiment] FIG. 1 is a front view showing an embodiment of the present invention. A plurality of convex portions 1 are provided on the circumferential surface of the magnetic rotating body 4 at regular intervals. A groove 2 is formed between adjacent convex portions 1.
is formed. A non-magnetic material 3 is provided to fill the groove 2, and the surface portion of the groove 2 is covered with the non-magnetic material 3.
第２図は、この発明の他の実施例を示す正面図である。FIG. 2 is a front view showing another embodiment of the invention.
第２図おいては、溝２の部分だけではなく、磁性回転体
全体が非磁性物質３で覆われている。この発明では、こ
のように、溝の表面部分だけてなく、磁性回転体全体を
非磁性物質で覆うこともできる。また、このように全体
を非磁性物質で覆う方が、製造しやすい場合もある。In FIG. 2, not only the groove 2 but also the entire magnetic rotating body is covered with the non-magnetic material 3. According to the present invention, not only the surface portion of the groove but also the entire magnetic rotating body can be covered with the non-magnetic material. Additionally, it may be easier to manufacture if the entire device is covered with a non-magnetic material like this.
また、第１図の実施例では、溝を埋めるように非磁性物
質で覆っているが、必ずしもこのように完全に溝を埋め
る必要はなく、溝の表面部分を所定の厚みで被覆するだ
けでもよい。しかしながら、第１図の実施例のように、
溝部分を非磁性物質で埋めると、小石等が溝に食い込む
のを完全に防止できる。In addition, in the embodiment shown in Fig. 1, the grooves are covered with a non-magnetic material so as to fill them, but it is not necessary to completely fill the grooves in this way, and it is also possible to just cover the surface portions of the grooves with a predetermined thickness. good. However, as in the embodiment of FIG.
Filling the grooves with non-magnetic material can completely prevent pebbles from digging into the grooves.
以下、具体的な実験例について示す。Specific experimental examples will be shown below.
実験例１
焼結により製造したギヤ状の磁性回転体（外径５７ｍｍ
；内径４６ｍｍ；モジュール１．Ｏ；凸部数５５）に通
常の表面処理をした後、その溝部分に、第１図のように
して、フェノール樹脂を充填し、溝部表面を被覆した。Experimental Example 1 Gear-shaped magnetic rotating body manufactured by sintering (outer diameter 57 mm)
;Inner diameter 46mm;Module 1. After the usual surface treatment was carried out on the grooves (O; number of protrusions: 55), the grooves were filled with phenol resin to cover the groove surfaces as shown in FIG.
このようにして得られた磁性回転体について、塩水噴霧
テストを行なった。この結果を第１表に示す。A salt spray test was conducted on the magnetic rotating body thus obtained. The results are shown in Table 1.
また、比較として、フェノール樹脂を充填していない磁
性回転体についても、同様の塩水噴霧テストを行ない、
第１表に併せて示した（比較例１）第 １ 表
Ｏ：赤錆の発生が認められなかった
Ｘ：赤錆の発生が認められた
実験例２
焼結により製造したギヤ状の磁性回転体（外径２８．１
ｍｍ；内径１２ｍｍ；凸部数２４）に通常の表面処理を
した後、第２図のように、磁性回転体全体をワックスで
被覆した。このようにして得られた磁性回転体を、第３
図に示すように、全く処理を施していない別体のギヤ６
と接触させて塩水噴霧テストを行なった。この結果を、
第２表に示す。For comparison, we also conducted a similar salt spray test on a magnetic rotating body that was not filled with phenolic resin.
Also shown in Table 1 (Comparative Example 1) Table 1 O: No occurrence of red rust was observed X: Occurrence of red rust was observed Experimental Example 2 A gear-shaped magnetic rotating body manufactured by sintering ( Outer diameter 28.1
mm; inner diameter 12 mm; number of protrusions 24) was subjected to normal surface treatment, and then the entire magnetic rotating body was coated with wax as shown in FIG. The magnetic rotating body thus obtained was transferred to the third
As shown in the figure, a separate gear 6 that has not been processed at all
A salt spray test was conducted in contact with This result,
Shown in Table 2.
また、比較として、ワックスで被覆していない磁性回転
体を同様に、全く処理を施してしいギヤと接触させて塩
水噴霧テストを行ない、その結果を第２表に併せて示し
た（比較例２）。In addition, for comparison, a salt spray test was conducted in which a magnetic rotating body that was not coated with wax was brought into contact with a completely untreated gear, and the results are also shown in Table 2 (Comparative Example 2). ).
第２表
Ｏ：赤錆の発生が認められなかった
×：赤錆の発生が認められた
以上の実験例から明らかなようにこの発明の磁性回転体
は、錆が発生しに＜＜、耐食性の向上が認めらだ。Table 2 O: No occurrence of red rust was observed. ×: Occurrence of red rust was observed. As is clear from the above experimental examples, the magnetic rotating body of the present invention has improved corrosion resistance without the occurrence of rust. is recognized.
実験例では、非磁性物質としてフェノール樹脂およびワ
ックスを用いたが、この発明の非磁性物質はこれらの物
質に限定されることなく、強磁性を譬しない物質であれ
ばいずれも用いることができる。例えば、フッ素化樹脂
等の熱可塑性樹脂やゴムなども用いることができる。In the experimental examples, phenol resin and wax were used as non-magnetic substances, but the non-magnetic substances of the present invention are not limited to these substances, and any substance that is not ferromagnetic can be used. For example, thermoplastic resins such as fluorinated resins, rubber, etc. can also be used.
また、この実施例では磁性回転体としてギヤ形状のもの
示したが、この発明の磁性回転体はこれらの形状のもの
に限定さないことは言うまでもない。Further, in this embodiment, a gear-shaped magnetic rotating body is shown, but it goes without saying that the magnetic rotating body of the present invention is not limited to these shapes.
［発明の効果］
以上説明したように、この発明の磁性回転体は、溝の表
面部分が非磁性物質で覆われているため、溝の表面部分
に水分や他の部品の錆びた液等が直接に接することはな
い。したがって、従来の磁性回転体に比べ、著しく耐食
性が向上する。また、非磁性物質の波膜により小石等に
よる傷の発生も有効に防止される。[Effects of the Invention] As explained above, in the magnetic rotating body of the present invention, the surface portions of the grooves are covered with a non-magnetic material, so moisture and rusted liquid from other parts do not accumulate on the surface portions of the grooves. There is no direct contact. Therefore, corrosion resistance is significantly improved compared to conventional magnetic rotating bodies. Furthermore, the wave film made of non-magnetic material effectively prevents scratches caused by small stones and the like.
第１図は、この発明の一実施例を示す正面図である。第
２図は、この発明の他の実施例を示す正面図である。第
３図は、この発明の実施例の１つである磁性回転体を無
処理のギヤと接触させた実験例２の状態を示す斜視図で
ある。第４図は、従来の磁性回転体と磁界センサとの作
用を説明するための概略構成図である。
図において、１は凸部、２は溝、３は非磁性物質、４は
磁性回転体を示す。
代理人弁理士深見久部′）゛、ハ）
入−θ゛・１
（ほか２名） −”−Ｑ゛□′
／：凸部 ３：Ｑノ煮仇＠％FIG. 1 is a front view showing an embodiment of the present invention. FIG. 2 is a front view showing another embodiment of the invention. FIG. 3 is a perspective view showing a state of Experimental Example 2 in which a magnetic rotating body, which is one of the embodiments of the present invention, is brought into contact with an untreated gear. FIG. 4 is a schematic configuration diagram for explaining the operation of a conventional magnetic rotating body and a magnetic field sensor. In the figure, 1 is a convex portion, 2 is a groove, 3 is a non-magnetic material, and 4 is a magnetic rotating body. Representative Patent Attorney Fukami Kube') ゛, C) Enter-θ゛・1 (and 2 others) −”-Q゛□′ /: Convex part 3: Q no stew @%
Claims (10)
面上に設け、該周面に沿って該凸部が円運動をするよう
に回転させることにより、該周面近傍に固定された磁界
センサに該凸部が近接し離隔して磁界の変化を与える磁
性回転体であって、少なくとも、隣り合う凸部の間で形
成される溝の表面部分を非磁性物質で覆うことを特徴と
する、磁性回転体。(1) A plurality of magnetic protrusions are provided on the circumferential surface at regular intervals, and fixed near the circumferential surface by rotating the protrusions in a circular motion along the circumferential surface. The magnetic rotating body is a magnetic rotating body in which the convex portion approaches and separates from a magnetic field sensor, and changes the magnetic field. Features a magnetic rotating body.
により、該溝の表面部分を非磁性物質で覆うことを特徴
とする、特許請求の範囲第１項記載の磁性回転体。(2) The magnetic rotating body according to claim 1, characterized in that the surface portion of the groove is covered with the non-magnetic material by filling the groove with the non-magnetic material.
特許請求の範囲第１項または第２項記載の磁性回転体。(3) The non-magnetic substance is a resin,
A magnetic rotating body according to claim 1 or 2.
特許請求の範囲第１項または第２項記載の磁性回転体。(4) the non-magnetic substance is rubber;
A magnetic rotating body according to claim 1 or 2.
る、特許請求の範囲第１項または第２項記載の磁性回転
体。(5) The magnetic rotating body according to claim 1 or 2, wherein the non-magnetic substance is wax.
れたものであることを特徴とする、特許請求の範囲第１
〜５項のいずれか１項に記載の磁性回転体。(6) Claim 1, wherein the convex portion is formed by cutting a magnetic steel material.
The magnetic rotating body according to any one of items 1 to 5.
る、特許請求の範囲第６項記載の磁性回転体。(7) The magnetic rotating body according to claim 6, wherein the steel material is a stainless steel material.
であることを特徴とする、特許請求の範囲第１〜５項の
いずれか１項に記載の磁性回転体。(8) The magnetic rotating body according to any one of claims 1 to 5, wherein the convex portion is made of magnetic pure iron.
ることを特徴とする、特許請求の範囲第１〜５項のいず
れか１項に記載の磁性回転体。(9) The magnetic rotating body according to any one of claims 1 to 5, wherein the convex portion is formed by a powder metallurgy method.
部分を覆うように形成されていることを特徴とする、特
許請求の範囲第１〜９項のいずれか１項に記載の磁性回
転体。(10) The magnetic rotating body according to any one of claims 1 to 9, wherein the non-magnetic material is formed by injection molding so as to cover the surface portion of the groove. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7741486A JPS62234768A (en) | 1986-04-02 | 1986-04-02 | Magnetic rotating body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7741486A JPS62234768A (en) | 1986-04-02 | 1986-04-02 | Magnetic rotating body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62234768A true JPS62234768A (en) | 1987-10-15 |
Family
ID=13633277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7741486A Pending JPS62234768A (en) | 1986-04-02 | 1986-04-02 | Magnetic rotating body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62234768A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0672298A (en) * | 1992-05-19 | 1994-03-15 | Skf Ind Spa | Railway vehicle axle having detector for rotational speed incorporated therein |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS494675B1 (en) * | 1967-05-11 | 1974-02-02 |
-
1986
- 1986-04-02 JP JP7741486A patent/JPS62234768A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS494675B1 (en) * | 1967-05-11 | 1974-02-02 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0672298A (en) * | 1992-05-19 | 1994-03-15 | Skf Ind Spa | Railway vehicle axle having detector for rotational speed incorporated therein |
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