JP2002340921A - Magnetic encoder and bearing for wheel provided with it - Google Patents
Magnetic encoder and bearing for wheel provided with itInfo
- Publication number
- JP2002340921A JP2002340921A JP2001143033A JP2001143033A JP2002340921A JP 2002340921 A JP2002340921 A JP 2002340921A JP 2001143033 A JP2001143033 A JP 2001143033A JP 2001143033 A JP2001143033 A JP 2001143033A JP 2002340921 A JP2002340921 A JP 2002340921A
- Authority
- JP
- Japan
- Prior art keywords
- elastic member
- magnetic encoder
- magnetic
- core
- plate
- 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
Landscapes
- Rolling Contact Bearings (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、車輪等の回転体
の回転速度を検出する回転検出装置を構成する磁気エン
コーダ、およびこれを具備する車輪用軸受に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic encoder constituting a rotation detecting device for detecting a rotation speed of a rotating body such as a wheel, and a wheel bearing provided with the magnetic encoder.
【０００２】[0002]
【従来の技術と発明が解決しようとする課題】自動車の
車輪等の回転体の回転速度を検出する回転検出装置とし
て、周方向に磁極を交互に形成した磁気エンコーダと、
この磁気エンコーダに所定のエアギャップを介して対面
配置されるセンサとで構成したものがある。また、この
種の回転検出装置において、センサを取り外し自在とす
ることにより、補修時にセンサのみを交換できるように
したものが知られている（特開２０００−２２１２０２
号公報）。2. Description of the Related Art As a rotation detecting device for detecting a rotation speed of a rotating body such as a wheel of an automobile, a magnetic encoder having magnetic poles alternately formed in a circumferential direction;
There is a magnetic encoder that includes a sensor that is arranged to face a predetermined air gap. Further, in this type of rotation detection device, there is known a rotation detection device in which only the sensor can be replaced at the time of repair by making the sensor detachable (Japanese Patent Laid-Open No. 2000-221202).
No.).
【０００３】しかし、前記回転検出装置において、磁気
エンコーダにおける磁極形成面はゴム製とされるのが一
般的であり、磁気エンコーダとセンサとの間のエアギャ
ップに飛び石やダストが噛み込んだような場合に、セン
サが破損するのは稀であり、ゴム製の磁気エンコーダが
破損する。このような場合、回転速度が検出できなくな
り、補修をする必要が生じるが、センサを交換しても補
修できず、磁気エンコーダを交換する必要が生じる。磁
気エンコーダは、車輪用軸受の内輪等の回転側部材に圧
入されているが、磁気エンコーダのみを市場で新品と交
換することは難しく、特に磁気エンコーダが、次に示す
従来例のようにシール装置の一部を成している場合は交
換が不可能である。However, in the above-mentioned rotation detecting device, the magnetic pole forming surface of the magnetic encoder is generally made of rubber, so that stepping stones or dust may bite into the air gap between the magnetic encoder and the sensor. In such cases, the sensor is rarely damaged, and the rubber magnetic encoder is damaged. In such a case, the rotation speed cannot be detected and repair is required. However, even if the sensor is replaced, repair cannot be performed, and the magnetic encoder needs to be replaced. The magnetic encoder is press-fitted into the rotating side member such as the inner ring of the wheel bearing, but it is difficult to replace only the magnetic encoder with a new one on the market. In particular, the magnetic encoder has a sealing device as in the following conventional example. If they are part of a, they cannot be exchanged.
【０００４】図１７は、磁気エンコーダをシール装置の
一部として組み込んだ車輪用軸受の部分断面図を示す。
この軸受では、転動体１０３を介して転接する内方部材
１０１および外方部材１０２間にシール装置１０５を設
けている。シール装置１０５は、各々断面Ｌ字状とされ
た第１，第２のシール板１０７，１０８を内方部材１０
１および外方部材１０２にそれぞれ嵌合させたものであ
る。第１のシール板１０７は、スリンガと呼ばれる。磁
気エンコーダ１０６は、磁性体粉が混入された弾性部材
１１０を、第１のシール板１０７に加硫接着して構成さ
れている。弾性部材１１０は、円周方向に交互に磁極が
形成され、その磁極を、対面配置されたセンサ１１１で
検出することにより回転速度を検出するようにされてい
る。このように、シール装置１０５に磁気エンコーダ１
０６を構成することにより、磁気エンコーダ１０６をコ
ンパクトに構成でき、また組立が簡単となる。FIG. 17 is a partial sectional view of a wheel bearing in which a magnetic encoder is incorporated as a part of a sealing device.
In this bearing, a sealing device 105 is provided between an inner member 101 and an outer member 102 which are in rolling contact with each other via a rolling element 103. The sealing device 105 couples the first and second sealing plates 107 and 108 each having an L-shaped cross section to the inner member 10.
1 and the outer member 102 respectively. The first seal plate 107 is called a slinger. The magnetic encoder 106 is configured by vulcanizing and bonding an elastic member 110 mixed with a magnetic substance powder to a first seal plate 107. The elastic member 110 has magnetic poles formed alternately in the circumferential direction, and the rotational speed is detected by detecting the magnetic poles with the sensor 111 disposed facing the magnetic pole. As described above, the magnetic encoder 1 is attached to the sealing device 105.
By configuring 06, the magnetic encoder 106 can be compactly configured and the assembly is simplified.
【０００５】しかし、このようにシール装置１０５の一
部として構成された磁気エンコーダ１０６では、補修の
ための交換は不可能である。そこで、このような場合、
従来においては、磁気エンコーダ１０６とともに軸受を
セット状態で交換している。このため、交換費用だけで
なく、交換作業に多大な工数がかかるという問題点を有
する。However, the magnetic encoder 106 configured as a part of the sealing device 105 cannot be replaced for repair. So, in such a case,
Conventionally, the bearings are replaced together with the magnetic encoder 106 in a set state. Therefore, there is a problem that not only the replacement cost but also a large number of steps are required for the replacement work.
【０００６】この発明の目的は、破損しても簡単に補修
できる磁気エンコーダ、およびこれを具備する車輪用軸
受を提供することを目的とする。An object of the present invention is to provide a magnetic encoder which can be easily repaired even if it is damaged, and a wheel bearing provided with the magnetic encoder.
【０００７】[0007]
【課題を解決するための手段】この発明の磁気エンコー
ダは、鋼板からなる環状の芯金と、この芯金に磁性体粉
を混入した弾性部材とを有し、この弾性部材の周方向に
交互に磁極を形成してなる磁気エンコーダであって、上
記弾性部材を芯金に対して着脱自在に装着したことを特
徴とする。この構成によると、弾性部材を芯金に対して
着脱自在に装着したため、弾性部材が破損したときに、
芯金に対して弾性部材を取り外して交換できる。そのた
め磁気エンコーダの損傷し易い弾性部材の補修を簡単に
行うことができる。A magnetic encoder according to the present invention has an annular core made of a steel plate and an elastic member in which a magnetic powder is mixed into the core, and is alternately arranged in a circumferential direction of the elastic member. A magnetic encoder having a magnetic pole formed thereon, wherein the elastic member is detachably mounted on a cored bar. According to this configuration, since the elastic member is detachably attached to the cored bar, when the elastic member is damaged,
The elastic member can be removed from the mandrel and replaced. Therefore, it is possible to easily repair the easily damaged elastic member of the magnetic encoder.
【０００８】この発明において、上記弾性部材の周縁に
係止部を設けても良い。このように弾性部材の周縁に係
止部を設けて芯金に係合させるようにした場合、芯金に
特別な加工が不要で芯金の構成，製造が簡単で済み、ま
た芯金の周縁での係脱作業となるため、弾性部材の係脱
が容易である。In the present invention, a locking portion may be provided on a peripheral edge of the elastic member. When the engaging portion is provided on the peripheral edge of the elastic member to engage with the metal core, no special processing is required for the metal core, the configuration and manufacture of the metal core are simple, and the peripheral edge of the metal core is also provided. Therefore, it is easy to engage and disengage the elastic member.
【０００９】この発明において、上記芯金の周縁部に凹
凸部を形成し、この凹凸部における凹部に弾性的に係合
する凸部を上記弾性部材に一体形成しても良い。このよ
うに構成した場合、芯金の周縁部の凹凸部の凹部に、弾
性部材の凸部を弾性的に係合させることで、弾性部材を
芯金に堅固に装着できる。そのため弾性部材の着脱を容
易に行うことができる。In the present invention, an uneven portion may be formed on a peripheral portion of the core metal, and a convex portion elastically engaged with a concave portion of the uneven portion may be integrally formed with the elastic member. In the case of such a configuration, the elastic member can be firmly attached to the core metal by elastically engaging the convex portion of the elastic member with the concave portion of the uneven portion on the peripheral edge of the core metal. Therefore, the attachment and detachment of the elastic member can be easily performed.
【００１０】この発明において、上記弾性部材に凸部を
一体形成し、この凸部を上記芯金に形成した通孔に弾性
的に装着しても良い。芯金の外径部のみに弾性部材を係
合させると、弾性部材の内径側が浮き上がり、検出精度
に影響を及ぼす恐れがあるが、このように芯金に通孔を
形成し、この通孔に弾性部材に凸部を装着すると、芯金
の内外径の中間部分で弾性部材を固定できるため、弾性
部材の芯金からの浮き上がりが防止される。In the present invention, a projection may be integrally formed on the elastic member, and the projection may be elastically attached to a through hole formed in the cored bar. When the elastic member is engaged only with the outer diameter portion of the core bar, the inner diameter side of the elastic member is lifted up, which may affect the detection accuracy. When the protrusion is attached to the elastic member, the elastic member can be fixed at an intermediate portion between the inner and outer diameters of the core bar, so that the elastic member is prevented from rising from the core bar.
【００１１】この発明において、上記弾性部材に、この
弾性部材の被検出面を覆う非磁性体からなる薄板を固着
しても良い。このように構成した場合、磁気エンコーダ
とセンサとの間に異物が噛み込んでも、弾性部材は非磁
性体からなる薄板で被覆されているので、噛み込んだ異
物で弾性部材が破損することがを防止される。弾性部材
を被覆する薄板は非磁性体からなるので、多極磁化され
た磁気エンコーダの磁気センサによる検出機能が損なわ
れることがない。In the present invention, a thin plate made of a non-magnetic material may be fixed to the elastic member so as to cover the surface to be detected of the elastic member. With this configuration, even if a foreign substance is caught between the magnetic encoder and the sensor, the elastic member is covered with a thin plate made of a non-magnetic material. Is prevented. Since the thin plate that covers the elastic member is made of a non-magnetic material, the detection function of the magnetic sensor of the multipolar magnetized magnetic encoder is not impaired.
【００１２】この発明の車輪用軸受は、上記発明の磁気
エンコーダを具備するものである。この構成によると、
磁気エンコーダを補修するとき、軸受全体を交換するこ
となく、磁気エンコーダの弾性部材を芯金に対して交換
することにより、磁気エンコーダだけの交換が可能とな
り、磁気エンコーダの補修を簡単に行うことができる。A wheel bearing according to the present invention includes the magnetic encoder according to the present invention. According to this configuration,
When repairing a magnetic encoder, it is possible to replace only the magnetic encoder by replacing the elastic member of the magnetic encoder with the core metal without replacing the entire bearing, making it possible to easily repair the magnetic encoder. it can.
【００１３】この発明において、上記車輪用軸受が、複
列の転走面を内周面に形成した外方部材と、この外方部
材の転走面と対向する転走面および車輪取付けフランジ
を形成した内方部材と、これら両転走面間に介在された
複列の転動体とを備え、車体に対して車輪を回転自在に
支持する車輪用軸受であって、上記外方部材と内方部材
との環状空間を密封するシール装置を設け、このシール
装置は、断面Ｌ字状をなし、上記外方部材または内方部
材のうちの回転側部材に嵌合される第１のシール板と、
この第１のシール板に対向し、上記外方部材の端部に嵌
合される断面Ｌ字状の第２のシール板とからなり、上記
第１のシール板の立板部に摺接するサイドリップ、およ
び円筒部に摺接するラジアルリップが上記第２のシール
板に加硫接着され、上記第１のシール板が上記芯金とな
り、その立板部に磁気エンコーダが形成されたものであ
っても良い。この構成の場合、軸受のシール装置の一部
として磁気エンコーダを組み込むことができるので、組
立性良くコンパクトに磁気エンコーダを設置できる。シ
ール装置は、第１，第２のシール板が対向し、サイドリ
ップおよびラジアルリップが摺接するため、密封性能が
優れたものとなる。通常では、このようにシール装置の
一部として磁気エンコーダを設けると、磁気エンコーダ
の損傷時の交換が難しいが、この発明によると、弾性部
材を芯金に対して着脱自在としたため、弾性部材の損傷
時に車輪用軸受に対して弾性部材だけを新品と交換する
ことができ、弾性部材を着脱自在とした効果が有効に発
揮される。In the present invention, the wheel bearing includes an outer member having a double-row rolling surface formed on an inner peripheral surface, a rolling surface facing the rolling surface of the outer member, and a wheel mounting flange. A wheel bearing for supporting a wheel rotatably with respect to a vehicle body, comprising a formed inner member and a double row of rolling elements interposed between the two rolling surfaces; A sealing device for sealing an annular space with the first member, the sealing device having an L-shaped cross section, and a first sealing plate fitted to a rotation-side member of the outer member or the inner member; When,
A second seal plate having an L-shaped cross section, which is fitted to an end of the outer member and faces the first seal plate, and which slides on an upright portion of the first seal plate; A lip and a radial lip slidingly contacting the cylindrical portion are vulcanized and bonded to the second seal plate, the first seal plate serves as the core metal, and a magnetic encoder is formed on the upright portion thereof; Is also good. In this configuration, the magnetic encoder can be incorporated as a part of the bearing sealing device, so that the magnetic encoder can be installed compactly with good assemblability. The sealing device has excellent sealing performance because the first and second sealing plates face each other and the side lip and the radial lip are in sliding contact with each other. Usually, if the magnetic encoder is provided as a part of the sealing device, it is difficult to replace the magnetic encoder when it is damaged. However, according to the present invention, the elastic member is detachable from the core metal, so that the elastic member At the time of damage, only the elastic member can be replaced with a new one for the wheel bearing, and the effect of making the elastic member detachable is effectively exhibited.
【００１４】[0014]
【発明の実施の形態】この発明の第１の実施形態を図１
ないし図４と共に説明する。図１はこの実施形態の磁気
エンコーダを具備する車輪用軸受の断面図を示す。この
車輪用軸受は、内方部材１および外方部材２と、これら
の内外の部材１，２間に収容される複数の転動体３と、
内外の部材１，２間の端部環状空間を密封するシール装
置５，１３とを備える。一端のシール装置５は、アキシ
アル型の磁気エンコーダ２０を有するものである。内方
部材１および外方部材２は、転動体３の転走面１ａ，２
ａを有しており、各転走面１ａ，２ａは溝状に形成され
ている。内方部材１および外方部材２は、各々転動体３
を介して互いに回転自在となった内周側の部材および外
周側の部材のことであり、軸受内輪および軸受外輪の単
独であっても良い。また、内方部材１は、軸であっても
良い。転動体３は、ボールまたはころからなり、この例
ではボールが用いられている。FIG. 1 shows a first embodiment of the present invention.
4 will be described with reference to FIG. FIG. 1 is a cross-sectional view of a wheel bearing provided with the magnetic encoder of this embodiment. The wheel bearing includes an inner member 1 and an outer member 2, a plurality of rolling elements 3 housed between the inner and outer members 1 and 2,
Sealing devices 5 and 13 for sealing an annular space at the end between the inner and outer members 1 and 2 are provided. The sealing device 5 at one end has an axial type magnetic encoder 20. The inner member 1 and the outer member 2 are formed by the rolling surfaces 1a, 2 of the rolling element 3.
a, and each of the rolling surfaces 1a and 2a is formed in a groove shape. The inner member 1 and the outer member 2 each include a rolling element 3
And the members on the inner peripheral side and the outer peripheral side that are rotatable with each other via the inner ring. The inner ring of the bearing and the outer ring of the bearing may be independent. Further, the inner member 1 may be a shaft. The rolling element 3 is formed of a ball or a roller. In this example, a ball is used.
【００１５】この車輪用軸受は、複列の転がり軸受、詳
しくは複列のアンギュラ玉軸受とされていて、その軸受
内輪は、ハブ輪６と、このハブ輪６の端部外径に嵌合し
た別体の内輪１Ａとで構成される。これらハブ輪６およ
び別体内輪１Ａに各転動体列の転走面１ａが形成されて
いる。The wheel bearing is a double row rolling bearing, more specifically, a double row angular contact ball bearing. The inner ring of the bearing is fitted to the hub wheel 6 and the outer diameter of the end of the hub wheel 6. And a separate inner ring 1A. A rolling surface 1a of each rolling element row is formed on the hub wheel 6 and the separate inner ring 1A.
【００１６】ハブ輪６には、等速自在継手７の一端（例
えば外輪）が連結され、ハブ輪６のフランジ部６ａに車
輪（図示せず）がボルト８で取付けられる。等速自在継
手７は、その他端（例えば内輪）が駆動軸（図示せず）
に連結される。外方部材２は、フランジ２ｂを有する軸
受外輪からなり、ナックル等からなるハウジング１０に
取付けられる。外方部材２は、両転動体列の軌道面２
ａ，２ａを有するものとされている。転動体３は各列毎
に保持器４で保持されている。内方部材１と外方部材２
の間の環状空間は、一端、つまり車軸中央側の端部が上
記のシール装置５で密封されている。外方部材２とハブ
輪６との間の環状空間の端部は、別のシール装置１３で
密封される。One end (for example, an outer ring) of a constant velocity universal joint 7 is connected to the hub wheel 6, and a wheel (not shown) is attached to a flange portion 6 a of the hub wheel 6 with a bolt 8. The other end (for example, inner ring) of the constant velocity universal joint 7 has a drive shaft (not shown).
Linked to The outer member 2 is formed of a bearing outer ring having a flange 2b, and is attached to a housing 10 formed of a knuckle or the like. The outer member 2 is a raceway surface 2 of both rolling element rows.
a, 2a. The rolling elements 3 are held by a holder 4 for each row. Inner member 1 and outer member 2
Is closed at one end, that is, the end on the center side of the axle, by the seal device 5 described above. The end of the annular space between the outer member 2 and the hub wheel 6 is sealed with another sealing device 13.
【００１７】図３は、シール装置５を拡大して示す。こ
のシール装置５は、内方部材１と外方部材２に各々取付
けられた第１および第２の環状のシール板１１，１２を
有する。これらシール板１１，１２は鋼板製で、各々内
方部材１および外方部材２に圧入状態に嵌合させること
で取付けられている。両シール板１１，１２は、各々円
筒部１１ａ，１２ａと立板部１１ｂ，１２ｂとでなる断
面Ｌ字状に形成されて互いに対向する。第１のシール板
１１は、内方部材１および外方部材２のうちの回転側の
部材である内方部材１に嵌合され、スリンガとなる。第
１のシール板１１は磁性体である。第１のシール板１１
の立板部１１ｂは、軸受外方側に配され、その外方側の
側面に、磁性体粉の混入された弾性部材１４が装着され
ている。この弾性部材１４は、第１のシール板１１を芯
金としてアキシアル型の磁気エンコーダ２０を構成する
ものであり、周方向に交互に磁極Ｎ，Ｓ（図２）が形成
され、例えばゴム磁石とされている。磁極Ｎ，Ｓは、ピ
ッチ円直径（ＰＣＤ）において、所定のピッチｐとなる
ように形成されている。この磁気エンコーダ２０の弾性
部材１４にアキシャル方向から対面して、同図のように
所定のエアギャップＧを介してセンサ１５を配置するこ
とにより、車輪回転速度の検出用の回転検出装置が構成
される。センサ１５は、車体に取付けられる。センサ１
５の出力は、例えばアンチロックブレーキシステムの制
御に用いられる。FIG. 3 shows the sealing device 5 in an enlarged manner. The seal device 5 has first and second annular seal plates 11 and 12 attached to the inner member 1 and the outer member 2, respectively. These seal plates 11 and 12 are made of a steel plate, and are attached to the inner member 1 and the outer member 2 by being fitted in a press-fit state. The two seal plates 11 and 12 are formed in an L-shaped cross section including the cylindrical portions 11a and 12a and the upright plates 11b and 12b, and face each other. The first seal plate 11 is fitted to the inner member 1 of the inner member 1 and the outer member 2 which is a member on the rotation side, and serves as a slinger. The first seal plate 11 is a magnetic material. First seal plate 11
The vertical plate portion 11b is disposed on the outer side of the bearing, and the elastic member 14 mixed with the magnetic powder is mounted on the outer side surface. The elastic member 14 constitutes an axial type magnetic encoder 20 using the first seal plate 11 as a core metal, and has magnetic poles N and S (FIG. 2) alternately formed in the circumferential direction. Have been. The magnetic poles N and S are formed to have a predetermined pitch p in a pitch circle diameter (PCD). By arranging a sensor 15 via the predetermined air gap G as shown in FIG. 1 so as to face the elastic member 14 of the magnetic encoder 20 in the axial direction, a rotation detecting device for detecting the wheel rotation speed is configured. You. The sensor 15 is mounted on a vehicle body. Sensor 1
The output of 5 is used, for example, for controlling an antilock brake system.
【００１８】第２のシール板１２は、第１のシール板１
１の立板部１１ｂに摺接するサイドリップ１６ａと円筒
部１１ａに摺接するラジアルリップ１６ｂ，１６ｃとを
一体に有する。これらリップ１６ａ〜１６ｃは、第２の
シール板１２に加硫接着された弾性部材１６の一部とし
て設けられている。第２のシール板１２は、固定側部材
である外方部材２との嵌合部に弾性部材１６を抱持した
ものである。第２のシール板１２の円筒部１２ａと第１
のシール板１１の立板部１１ｂの先端とは僅かな径方向
隙間をもって対峙させ、その隙間でラビリンスシール１
７を構成している。The second seal plate 12 is a first seal plate 1
One side lip 16a slidingly contacting the upright plate portion 11b and radial lips 16b and 16c slidingly contacting the cylindrical portion 11a are integrally provided. These lips 16a to 16c are provided as a part of the elastic member 16 which is vulcanized and bonded to the second seal plate 12. The second seal plate 12 has an elastic member 16 held at a fitting portion with the outer member 2 which is a fixed-side member. The cylindrical portion 12a of the second seal plate 12 and the first
Of the sealing plate 11 with a slight radial gap, and the labyrinth seal 1
7.
【００１９】磁気エンコーダ２０において、弾性部材１
４の芯金である第１のシール板１１への装着は、図４に
拡大して示すように、弾性部材１４の周縁に一体に設け
た係止部１８をシール板１１の立板部１１ｂの周縁に弾
性的に係止させることで、着脱自在となるように行われ
ている。係止部１８は、弾性部材１４の外周縁から裏面
側へ突出したかぎ型の部分であり、自然状態では同図に
鎖線で示すようにシール板立板部１１ｂの外周縁を抱持
する形状となる。係止部１８は、弾性部材１４の全周に
続くものであっても、また周方向の１か所または複数箇
所でスリット等により分割されて弾性部材１４の略全周
に設けられたものであっても、周方向の複数箇所に離し
て設けられたものであっても良い。弾性部材１４の装着
時は、係止部１８を同図に実線で示すように捲り上げ、
立板部１１ｂが嵌まり込む状態としてから係止部１８を
離すことにより、弾性部材１４が弾性で復元し、係止部
１８が立板部１１ｂの外周縁に係合する。In the magnetic encoder 20, the elastic member 1
As shown in an enlarged view in FIG. 4, the first seal plate 11, which is a metal core of the fourth embodiment, is provided with a locking portion 18 provided integrally on the peripheral edge of the elastic member 14 by an upright plate portion 11b of the seal plate 11. It is made to be detachable by elastically engaging with the peripheral edge of. The locking portion 18 is a hook-shaped portion protruding from the outer peripheral edge of the elastic member 14 to the rear surface side. In a natural state, the engaging portion 18 has a shape that embraces the outer peripheral edge of the seal plate standing plate portion 11b as shown by a chain line in FIG. Become. The locking portion 18 may be continuous with the entire periphery of the elastic member 14 or may be divided at one or more positions in the circumferential direction by a slit or the like and provided on substantially the entire periphery of the elastic member 14. Even if they are provided, they may be provided separately at a plurality of locations in the circumferential direction. When the elastic member 14 is mounted, the locking portion 18 is turned up as shown by a solid line in FIG.
By releasing the locking portion 18 after the upright portion 11b is fitted, the elastic member 14 is restored elastically, and the locking portion 18 engages with the outer peripheral edge of the upright portion 11b.
【００２０】このように、この磁気エンコーダ２０で
は、弾性部材１４の周縁に設けた係止部１８を、芯金で
ある第１のシール板１１の立板部１１ｂに係止させて装
着するようにしているので、立板部１１ｂに対する弾性
部材１４の着脱を簡単に行うことができる。その結果、
この磁気エンコーダ２０と前記センサ１５との間に異物
が噛み込むなどして、弾性部材１４が破損したような場
合にも、軸受全体を交換するといった面倒な作業を要す
ることなく、第１のシール板１１の立板部１１ｂに対し
て弾性部材１４を交換するだけで、簡単に磁気エンコー
ダ２０を補修することができる。As described above, in the magnetic encoder 20, the engaging portion 18 provided on the peripheral edge of the elastic member 14 is attached to the upright plate portion 11b of the first seal plate 11, which is a metal core, while being engaged therewith. Therefore, the elastic member 14 can be easily attached to and detached from the upright portion 11b. as a result,
Even when the elastic member 14 is damaged due to a foreign object biting between the magnetic encoder 20 and the sensor 15, the first seal can be replaced without troublesome work such as replacing the entire bearing. The magnetic encoder 20 can be easily repaired simply by replacing the elastic member 14 with the upright portion 11b of the plate 11.
【００２１】また、上記構成の車輪用軸受では、軸受の
端部のシール装置５の一部として磁気エンコーダ２０が
組み込まれているので、コンパクトに磁気エンコーダ２
０を設置できる。シール装置５は、第１，第２のシール
板１１，１２が対向し、サイドリップ１６ａおよびラジ
アルリップ１６ｂが摺接するため、密封性能が優れたも
のとなる。In the wheel bearing having the above structure, the magnetic encoder 20 is incorporated as a part of the seal device 5 at the end of the bearing.
0 can be set. The sealing device 5 has excellent sealing performance because the first and second sealing plates 11 and 12 face each other and the side lip 16a and the radial lip 16b are in sliding contact.
【００２２】図５，図６は、アキシアル型の磁気エンコ
ーダ２０の他の実施形態を示す。この磁気エンコーダ２
０は、図５（Ｂ）に示すように、芯金である第１のシー
ル板１１の立板部１１ｂの周縁部に、凹凸部１９ａ，１
９ｂを形成すると共に、図６に示すように、弾性部材１
４の周縁部の裏面側に周方向に並ぶ複数の凸部１４ａを
一体形成し、これら凸部１４ａを図５（Ａ）のように立
板部１１ｂの各凹部１９ｂに弾性的に圧入状態に係合さ
せることで、立板部１１ｂへの弾性部材１４の装着が着
脱自在に行われている。凹凸部１９ａ，１９ｂは、ギヤ
状のものとしてある。FIGS. 5 and 6 show another embodiment of the axial type magnetic encoder 20. FIG. This magnetic encoder 2
0, as shown in FIG. 5 (B), the uneven portions 19a, 1 are formed on the peripheral portion of the upright portion 11b of the first seal plate 11, which is a metal core.
9b, and as shown in FIG.
A plurality of protrusions 14a arranged in the circumferential direction are integrally formed on the back surface side of the peripheral edge portion of No. 4 and these protrusions 14a are elastically pressed into the respective recesses 19b of the standing plate portion 11b as shown in FIG. The engagement allows the elastic member 14 to be detachably attached to the upright portion 11b. The uneven portions 19a and 19b are gear-shaped.
【００２３】これにより、ゴム磁石である弾性部材１４
を、芯金である第１のシール部材１１に対して堅固にか
つ着脱自在に装着できる。そのため、弾性部材１４を交
換するだけで、簡単に磁気エンコーダ２０を補修するこ
とができる。なお、凹凸部１９ａ，１９ｂを設ける代わ
りに、芯金、つまりシール板１１の外径縁における周方
向の複数箇所に切欠を設けても良い。その場合、弾性部
材１４に設けた凸部１４ａをその切欠に弾性的に圧入状
態に係合させる。Thus, the elastic member 14 which is a rubber magnet
Can be firmly and detachably attached to the first seal member 11 which is a metal core. Therefore, the magnetic encoder 20 can be easily repaired only by replacing the elastic member 14. Instead of providing the concave and convex portions 19a and 19b, notches may be provided at a plurality of positions in the circumferential direction at the outer peripheral edge of the core metal, that is, the seal plate 11. In this case, the protrusion 14a provided on the elastic member 14 is elastically engaged with the notch in a press-fit state.
【００２４】図７は、アキシアル型の磁気エンコーダ２
０のさらに他の実施形態を示す。この磁気エンコーダ２
０は、図５および図６に示す実施形態において、弾性部
材１４の周縁部の凸部１４ａに抜止爪１４ａａを設けた
ものである。その他の構成は図５および図６に示す実施
形態と同じである。FIG. 7 shows an axial type magnetic encoder 2.
0 shows yet another embodiment. This magnetic encoder 2
Reference numeral 0 denotes the embodiment shown in FIGS. 5 and 6 in which a retaining claw 14aa is provided on the protrusion 14a on the peripheral edge of the elastic member 14. Other configurations are the same as those of the embodiment shown in FIGS.
【００２５】これにより、立板部１１ｂの周縁部の凹部
１９ｂに弾性係合した弾性部材１４の凸部１４ａが凹部
１９ｂから脱落するのを、凸部１４ａの抜止爪１４ａａ
で確実に阻止することができ、立板部１１ｂに対して弾
性部材１４をより堅固に装着することができる。As a result, the protrusion 14a of the elastic member 14, which is elastically engaged with the recess 19b at the peripheral edge of the upright portion 11b, is prevented from dropping from the recess 19b.
Thus, the elastic member 14 can be more firmly attached to the upright portion 11b.
【００２６】図８は、アキシアル型の磁気エンコーダ２
０のさらに他の実施形態を示す。この磁気エンコーダ２
０は、芯金である第１のシール板１１の立板部１１ｂに
複数の通孔２１を形成すると共に、ゴム磁石である弾性
部材１４の裏面に、前記通孔２１に対応する複数の凸部
１４ｂを一体形成し、これらの凸部１４ｂを前記立板部
１１ｂの対応する通孔２１に弾性装着させることで、立
板部１１ｂへの弾性部材１４の装着が着脱自在に行われ
ている。弾性部材１４の凸部１４ｂには通孔２１に嵌合
させる部分よりも大径の抜止部１４ｂｂが設けられてお
り、これにより弾性部材１４の凸部１４ｂが立板部１１
ｂの通孔２１から脱落するのを阻止している。FIG. 8 shows an axial type magnetic encoder 2.
0 shows yet another embodiment. This magnetic encoder 2
Reference numeral 0 denotes a plurality of through holes 21 formed in the upright plate portion 11b of the first seal plate 11 as the core metal, and a plurality of protrusions corresponding to the through holes 21 on the back surface of the elastic member 14 as the rubber magnet. The protrusions 14b are integrally formed, and these protrusions 14b are elastically mounted in the corresponding through holes 21 of the upright portion 11b, so that the elastic member 14 is detachably attached to the upright portion 11b. . The convex portion 14b of the elastic member 14 is provided with a retaining portion 14bb having a diameter larger than that of the portion to be fitted into the through hole 21, so that the convex portion 14b of the elastic member 14
b is prevented from dropping out of the through hole 21.
【００２７】このように芯金となる第１のシール板１１
に通孔２１を設け、この通孔２１に弾性部材１４の凸部
１４ｂを弾性的に圧入した場合、弾性部材１４を外周部
だけで取付ものと異なり、弾性部材１４がシール板１１
から浮き上がり、検出精度に影響することが防止され
る。凸部１４ｂの先端に抜止部１４ｂｂを設けた場合
は、弾性部材１４が確実に装着でき、外れる恐れがなく
なる。The first seal plate 11 serving as a core metal as described above
When the convex portion 14b of the elastic member 14 is elastically press-fitted into the through hole 21, the elastic member 14 is different from the one in which the elastic member 14 is attached only at the outer peripheral portion.
From rising and affecting the detection accuracy. In the case where the retaining portion 14bb is provided at the tip of the convex portion 14b, the elastic member 14 can be securely attached and there is no possibility that the elastic member 14 will come off.
【００２８】図９は、アキシアル型の磁気エンコーダ２
０のさらに他の実施形態を示す。この磁気エンコーダ２
０は、芯金である第１のシール板１１の立板部１１ｂに
複数の通孔２１を形成すると共に、ゴム磁石である弾性
部材１４の周縁に図４の例と同じ係止部１８を設け、か
つ弾性部材１４の裏面に前記通孔２１に対応する複数の
凸部１４ｂを一体形成してある。弾性部材１４の係止部
１８を立板部１１ｂの周縁に係止させ、弾性部材１４の
凸部１４ｂを立板部１１ｂの通孔２１に弾性装着させる
ことで、立板部１１ｂへの弾性部材１４の装着が着脱自
在に行われる。弾性部材１４の凸部１４ｂに抜止部１４
ｂｂが設けられることは図８の実施形態と同じである。FIG. 9 shows an axial type magnetic encoder 2.
0 shows yet another embodiment. This magnetic encoder 2
Reference numeral 0 designates a plurality of through holes 21 formed in the upright plate portion 11b of the first seal plate 11 which is a metal core, and the same locking portion 18 as the example of FIG. A plurality of projections 14b corresponding to the through holes 21 are integrally formed on the back surface of the elastic member 14. The locking portion 18 of the elastic member 14 is locked to the peripheral edge of the upright portion 11b, and the protrusion 14b of the elastic member 14 is elastically attached to the through hole 21 of the upright portion 11b. The mounting of the member 14 is performed detachably. The retaining portion 14 is provided on the convex portion 14b of the elastic member 14.
bb is provided as in the embodiment of FIG.
【００２９】この構成の磁気エンコーダ２０では、弾性
部材１４の周縁が係止部１８で立板部１１ｂの周縁に係
止されるうえ、弾性部材１４の周縁より内径側の部分が
凸部１４ｂで立板部１１ｂの通孔２１に弾性装着される
ので、弾性部材１４を芯金であるシール板１１に確実に
装着でき、また弾性部材１４の浮き上がりも防止するこ
とができる。In the magnetic encoder 20 having this configuration, the peripheral edge of the elastic member 14 is retained by the retaining portion 18 on the peripheral edge of the standing plate portion 11b, and the portion on the inner diameter side of the peripheral edge of the elastic member 14 is retained by the convex portion 14b. Since the elastic member 14 is elastically attached to the through hole 21 of the upright portion 11b, the elastic member 14 can be securely attached to the seal plate 11 which is a metal core, and the elastic member 14 can be prevented from floating.
【００３０】図１０は、アキシアル型の磁気エンコーダ
２０のさらに他の実施形態を示す。この磁気エンコーダ
２０は、図８に示す実施形態において、ゴム磁石である
弾性部材１４の表面つまりセンサ対向面に、非磁性体か
らなる薄板２２が固着されている。薄板２２は、弾性部
材１４よりも硬質の部材であり、例えば非磁性体の金属
板、またはプラスチック板が用いられる。その他の構成
は、図８の実施形態と同じである。FIG. 10 shows still another embodiment of the axial type magnetic encoder 20. In the magnetic encoder 20, in the embodiment shown in FIG. 8, a thin plate 22 made of a non-magnetic material is fixed to the surface of the elastic member 14, which is a rubber magnet, that is, the sensor-facing surface. The thin plate 22 is a member harder than the elastic member 14, and for example, a nonmagnetic metal plate or a plastic plate is used. Other configurations are the same as the embodiment of FIG.
【００３１】この構成の磁気エンコーダ２０では、弾性
部材１４のセンサ対向面が非磁性体からなる薄板２２で
被覆されているので、磁気エンコーダ２０とセンサ１５
（図１）の間のエアギャップＧに異物が噛み込んだよう
な場合でも、その異物によって弾性部材１４が破損する
ことを、薄板２２で保護することができる。また、保護
材である薄板２２が非磁性体からなるので、磁気エンコ
ーダ２０の機能が低下することもない。In the magnetic encoder 20 having this configuration, the sensor facing surface of the elastic member 14 is covered with the thin plate 22 made of a non-magnetic material.
Even in the case where a foreign matter is caught in the air gap G between (FIG. 1), the thin plate 22 can protect the elastic member 14 from being damaged by the foreign matter. In addition, since the thin plate 22 serving as a protective material is made of a nonmagnetic material, the function of the magnetic encoder 20 does not decrease.
【００３２】なお、弾性部材１４への薄板２２の固着
は、図４〜図７，図９に示した各実施形態に適用しても
良く、その場合にも上記と同様に弾性部材１４の損傷を
防止することができる。The fixing of the thin plate 22 to the elastic member 14 may be applied to each of the embodiments shown in FIGS. 4 to 7 and FIG. Can be prevented.
【００３３】図１１は、ラジアル型とした実施形態の磁
気エンコーダ７０を具備する車輪用軸受を示す。この車
輪用軸受は、内方部材５１および外方部材５２と、これ
ら内外の部材５１，５２間に収容される複数の転動体５
３と、内外の部材５１，５２間の端部環状空間を密封す
るシール装置５５，６３とを備え、一端にシール装置５
５とは別の磁気エンコーダ７０が設けられている。内方
部材５１および外方部材５２は、転動体５３の転走面を
有し、各転走面は溝状に形成されている。FIG. 11 shows a wheel bearing provided with a magnetic encoder 70 of a radial type embodiment. The wheel bearing includes an inner member 51 and an outer member 52, and a plurality of rolling elements 5 housed between the inner and outer members 51 and 52.
3 and sealing devices 55 and 63 for sealing an end annular space between the inner and outer members 51 and 52, and a sealing device 5 at one end.
A magnetic encoder 70 different from 5 is provided. The inner member 51 and the outer member 52 have rolling surfaces of the rolling elements 53, and each rolling surface is formed in a groove shape.
【００３４】内方部材５１は、一対の分割型の内輪５１
Ａ，５１Ｂと、これら内輪５１Ａ，５１Ｂの内径面に嵌
合する固定の車軸（図示せず）とからなる。外方部材５
２は回転輪となるものであり、一体のハブ輪兼用の軸受
外輪からなる。The inner member 51 comprises a pair of split inner rings 51.
A, 51B, and a fixed axle (not shown) fitted to the inner diameter surfaces of the inner rings 51A, 51B. Outer member 5
Reference numeral 2 denotes a rotating wheel, which is an integral bearing outer ring that also serves as a hub wheel.
【００３５】外方部材５２の一端の外周に、上記磁気エ
ンコーダ７０が嵌合している。この磁気エンコーダ７０
は、図１２に拡大して示すように、外方部材５２の外周
に嵌合した鋼板製の環状の芯金６２と、この芯金６２を
芯金としてその外周に設けられた弾性部材６４とからな
る。芯金６２は、その円筒部分の一端に外向きのフラン
ジ６２ａを形成して、強度アップが図られている。弾性
部材６４は、アキシャル方向の幅に比べてラジアル方向
の厚さが薄いリング状とされている。弾性部材６４は、
第１の実施形態と同じく、周方向に交互に磁極Ｎ，Ｓが
形成され、例えばゴム磁石とされている。ただし、磁極
Ｎ，Ｓの磁束の発生方向は、弾性部材６４のラジアル方
向である。弾性部材６４の材質は、第１の実施形態にお
ける弾性部材１４と同じである。センサ７５は、磁気エ
ンコーダ７０に対して所定のエアギャップＧを介してラ
ジアル方向に対面して、固定側の部材に設けられる。The magnetic encoder 70 is fitted around one end of the outer member 52. This magnetic encoder 70
As shown in an enlarged view in FIG. 12, an annular metal core 62 made of a steel plate fitted on the outer circumference of the outer member 52, and an elastic member 64 provided on the outer circumference of the metal core 62 using the metal core 62 as a metal core. Consists of The core metal 62 is formed with an outward flange 62a at one end of the cylindrical portion to increase the strength. The elastic member 64 is formed in a ring shape whose thickness in the radial direction is smaller than the width in the axial direction. The elastic member 64
As in the first embodiment, magnetic poles N and S are formed alternately in the circumferential direction, and are, for example, rubber magnets. However, the direction in which the magnetic fluxes of the magnetic poles N and S are generated is the radial direction of the elastic member 64. The material of the elastic member 64 is the same as the elastic member 14 in the first embodiment. The sensor 75 is provided on a fixed member facing the magnetic encoder 70 in the radial direction via a predetermined air gap G.
【００３６】磁気エンコーダ７０におけるゴム磁石であ
る弾性部材６４の芯金６２への装着は、次のように着脱
自在に行われる。芯金６２のフランジ６２ａに、図１３
に示すようにギア状の凹凸部７９ａ，７９ｂを形成する
と共に、図１４に示すように弾性部材１４の一側部に周
方向に並ぶ複数の凸部６４ａを一体形成する。これら凸
部６４ａを図１２のように芯金６２のフランジ６２ａの
各凹部７９ｂに弾性的に圧入状態に係合させることによ
り、芯金６２への弾性部材６４の装着が着脱自在に行わ
れる。The attachment of the elastic member 64, which is a rubber magnet, to the core metal 62 in the magnetic encoder 70 is performed detachably as follows. 13 is attached to the flange 62a of the metal core 62.
As shown in FIG. 14, gear-shaped uneven portions 79a and 79b are formed, and a plurality of convex portions 64a arranged in the circumferential direction are integrally formed on one side of the elastic member 14 as shown in FIG. The elastic members 64 are removably attached to the metal core 62 by engaging these convex portions 64a with the respective concave portions 79b of the flange 62a of the metal core 62 in a press-fit state as shown in FIG.
【００３７】このように、この磁気エンコーダ７０で
は、弾性部材６４の一側部に一体形成した凸部６４ａ
を、芯金である芯金６２のフランジ６２ａの凹部７９ｂ
に弾性係合させて装着するようにしているので、芯金６
２に対する弾性部材６４の着脱を簡単に行うことができ
る。その結果、この磁気エンコーダ７０と前記センサ７
５との間に異物が噛み込む等して、弾性部材６４が破損
したような場合にも、軸受全体を交換するといった面倒
な作業を要することなく、芯金６２に対して弾性部材６
４を交換するだけで、簡単に磁気エンコーダ７０を補修
することができる。As described above, in the magnetic encoder 70, the protrusion 64a integrally formed on one side of the elastic member 64 is provided.
The concave portion 79b of the flange 62a of the metal core 62 as the metal core.
Is attached by elastically engaging with the metal core 6.
The elastic member 64 can be easily attached to and detached from the second member 2. As a result, the magnetic encoder 70 and the sensor 7
Even when the elastic member 64 is damaged due to a foreign object biting into the space between the core member 62 and the elastic member 64, the elastic member 6 does not need to be replaced by a troublesome operation such as replacing the entire bearing.
The magnetic encoder 70 can be easily repaired simply by replacing the magnetic encoder 70.
【００３８】図１５は、ラジアル型の磁気エンコーダ７
０の他の実施形態を示す。この磁気エンコーダ７０は、
芯金６２に複数の通孔７６を形成すると共に、ゴム磁石
である弾性部材６４の裏面に前記通孔７６に対応する複
数の凸部６４ｂを一体形成し、これらの凸部６４ｂを芯
金６２の対応する通孔７６に弾性装着させることで、芯
金６２への弾性部材６４の装着が着脱自在に行われてい
る。FIG. 15 shows a radial type magnetic encoder 7.
0 shows another embodiment. This magnetic encoder 70
A plurality of through holes 76 are formed in the metal core 62, and a plurality of convex portions 64 b corresponding to the through holes 76 are integrally formed on the back surface of the elastic member 64, which is a rubber magnet, and these convex portions 64 b are connected to the core metal 62. The elastic member 64 is detachably attached to the cored bar 62 by elastically attaching the corresponding through hole 76 to the core member 62.
【００３９】この磁気エンコーダ２０の場合、ゴム磁石
である弾性部材６４を、芯金６２に対して回り止めされ
る状態で堅固にかつ着脱自在に装着できるので、弾性部
材６４を交換するだけで、簡単に磁気エンコーダ７０を
補修することができる。In the case of the magnetic encoder 20, the elastic member 64, which is a rubber magnet, can be firmly and removably attached to the cored bar 62 in a state where it is prevented from rotating. The magnetic encoder 70 can be easily repaired.
【００４０】図１６は、ラジアル型の磁気エンコーダ７
０のさらに他の実施形態を示す。この磁気エンコーダ７
０は、図１５に示す実施形態において、ゴム磁石である
弾性部材６４の表面つまりセンサ対向面に、非磁性体か
らなる薄板７２が固着されている。薄板７２の材質は、
図１０の実施形態の薄板と同じである。その他の構成
は、図１５の実施形態と同じである。FIG. 16 shows a radial type magnetic encoder 7.
0 shows yet another embodiment. This magnetic encoder 7
In the embodiment shown in FIG. 15, a thin plate 72 made of a non-magnetic material is fixed to the surface of the elastic member 64 which is a rubber magnet, that is, the sensor-facing surface in the embodiment shown in FIG. The material of the thin plate 72 is
This is the same as the thin plate of the embodiment of FIG. Other configurations are the same as the embodiment of FIG.
【００４１】この構成の磁気エンコーダ７０では、弾性
部材６４のセンサ対向面が非磁性体からなる薄板７２で
被覆されているので、磁気エンコーダ７０とセンサ７５
（図１２）の間のエアギャップＧに異物が噛み込んだよ
うな場合でも、その異物によって弾性部材６４が破損す
るのを前記薄板７２で保護することができる。また、保
護材である薄板７２が非磁性体からなるので、磁気エン
コーダ７０の検出機能が低下することもない。In the magnetic encoder 70 having this configuration, since the sensor-facing surface of the elastic member 64 is covered with the thin plate 72 made of a non-magnetic material, the magnetic encoder 70 and the sensor 75
Even in the case where a foreign matter is caught in the air gap G between (FIG. 12), the thin plate 72 can protect the elastic member 64 from being damaged by the foreign matter. Further, since the thin plate 72 serving as a protective material is made of a non-magnetic material, the detection function of the magnetic encoder 70 does not decrease.
【００４２】なお、弾性部材６４への薄板７２の固着
は、図１２〜図１４に示した実施形態に適用しても良
く、この場合にも同様に弾性部材６４の損傷を防止する
ことができる。The fixing of the thin plate 72 to the elastic member 64 may be applied to the embodiment shown in FIGS. 12 to 14. In this case, the elastic member 64 can be similarly prevented from being damaged. .
【００４３】[0043]
【発明の効果】この発明の磁気エンコーダは、鋼板から
なる環状の芯金と、この芯金に磁性体粉を混入した弾性
部材とを有し、この弾性部材の周方向に交互に磁極を形
成してなる磁気エンコーダにおいて、上記弾性部材を芯
金に対して着脱自在に装着したため、弾性部材が損傷し
たときに、芯金に対して弾性部材を取り外して交換でき
るので、磁気エンコーダの補修を簡単に行うことができ
る。弾性部材の周縁に係止部を設けた場合は、係止部に
より、弾性部材を芯金に簡単にかつ堅固に装着できる。
芯金の周縁部に凹凸部を形成し、この凹部に弾性的に係
合する凸部を弾性部材に一体形成した場合は、芯金の周
縁部の凹凸部の凹部に、弾性部材の凸部を弾性係合させ
ることで、弾性部材を芯金に堅固に装着できる。弾性部
材に凸部を一体形成し、この凸部を芯金に形成した通孔
に弾性装着した場合は、弾性部材の芯金からの浮き上が
りが防止できる。弾性部材に非磁性体からなる薄板を固
着した場合は、磁気エンコーダとセンサとの間に異物が
噛み込んでも、その異物で弾性部材が破損するのを防止
できる。薄板は非磁性体からなるので、磁気エンコーダ
の機能が損なわれることがない。この発明の車輪用軸受
は、この発明の磁気エンコーダを具備するものとしたた
め、磁気エンコーダを補修するときに、軸受全体を交換
することなく、磁気エンコーダの弾性部材を芯金に対し
て交換することにより、磁気エンコーダだけの交換が可
能となり、磁気エンコーダの補修を簡単に行うことがで
きる。この発明の車輪用軸受において、上記車輪用軸受
が、複列の転走面を内周面に形成した外方部材と、この
外方部材の転走面と対向する転走面および車輪取付けフ
ランジを形成した内方部材と、これら両転走面間に介在
された複列の転動体とを備え、車体に対して車輪を回転
自在に支持する車輪用軸受であって、上記外方部材と内
方部材との環状空間を密封するシール装置を設け、この
シール装置は、断面Ｌ字状をなし、上記外方部材または
内方部材のうちの回転側部材に嵌合される第１のシール
板と、この第１のシール板に対向し、上記外方部材の端
部に嵌合される断面Ｌ字状の第２のシール板とからな
り、上記第１のシール板の立板部に摺接するサイドリッ
プ、および円筒部に摺接するラジアルリップを上記第２
のシール板に加硫接着され、上記第１のシール板が上記
芯金となり、その立板部に磁気エンコーダが形成される
場合は、シール装置の一部として磁気エンコーダを組み
込むことができて、軸受の組立性、コンパクト化を向上
させ、かつ優れたシール性能が得ながら、シール装置の
一部として磁気エンコーダを設けたことによる不利益を
解消し、弾性部材の損傷時の補修を容易に行うことがで
きる。The magnetic encoder of the present invention has an annular core made of a steel plate and an elastic member in which a magnetic powder is mixed into the core, and magnetic poles are formed alternately in the circumferential direction of the elastic member. In the magnetic encoder, the elastic member is detachably attached to the core, so that when the elastic member is damaged, the elastic member can be removed from the core and replaced, thereby simplifying the repair of the magnetic encoder. Can be done. When the locking portion is provided on the periphery of the elastic member, the locking member allows the elastic member to be easily and firmly attached to the cored bar.
When an uneven portion is formed on the peripheral portion of the metal core and a convex portion elastically engaging with the concave portion is formed integrally with the elastic member, the convex portion of the elastic member is formed on the concave portion of the uneven portion on the peripheral portion of the core metal. Is elastically engaged, the elastic member can be firmly attached to the cored bar. When the convex portion is formed integrally with the elastic member, and the convex portion is elastically attached to the through hole formed in the metal core, the elastic member can be prevented from floating from the metal core. In the case where a thin plate made of a non-magnetic material is fixed to the elastic member, it is possible to prevent the foreign material from damaging the elastic member even if the foreign matter is caught between the magnetic encoder and the sensor. Since the thin plate is made of a non-magnetic material, the function of the magnetic encoder is not impaired. Since the wheel bearing according to the present invention includes the magnetic encoder according to the present invention, when repairing the magnetic encoder, the elastic member of the magnetic encoder is replaced with the core metal without replacing the entire bearing. Accordingly, only the magnetic encoder can be replaced, and the magnetic encoder can be easily repaired. In the wheel bearing of the present invention, the wheel bearing includes an outer member having a double-row rolling surface formed on an inner peripheral surface, a rolling surface facing the rolling surface of the outer member, and a wheel mounting flange. A wheel bearing that includes an inner member formed with a double-row rolling element interposed between these two rolling surfaces, and that rotatably supports the wheel with respect to the vehicle body. A sealing device for sealing an annular space with the inner member is provided. The sealing device has an L-shaped cross section, and is a first seal fitted to the rotating member of the outer member or the inner member. And a second seal plate having an L-shaped cross section, which is opposed to the first seal plate and is fitted to the end of the outer member. The upright plate portion of the first seal plate The side lip that slides and the radial lip that slides on the cylindrical portion
In the case where the first seal plate is the cored bar and the magnetic encoder is formed on the standing plate portion, the magnetic encoder can be incorporated as a part of the seal device, While improving the assemblability and compactness of the bearing and achieving excellent sealing performance, it eliminates the disadvantages of providing a magnetic encoder as a part of the sealing device and easily repairs damaged elastic members. be able to.
【図１】この発明の第１の実施形態にかかるアキシアル
型の磁気エンコーダを具備する車輪用軸受を設置した車
輪支持装置の断面図である。FIG. 1 is a cross-sectional view of a wheel support device provided with a wheel bearing having an axial magnetic encoder according to a first embodiment of the present invention.
【図２】その磁気エンコーダにおける弾性部材の部分正
面図である。FIG. 2 is a partial front view of an elastic member in the magnetic encoder.
【図３】同車輪用軸受の部分断面図である。FIG. 3 is a partial sectional view of the wheel bearing.
【図４】同磁気エンコーダにおける芯金への弾性部材の
装着作業の説明図である。FIG. 4 is an explanatory diagram of an operation of attaching an elastic member to a core metal in the magnetic encoder.
【図５】（Ａ）は同磁気エンコーダにおける芯金の要部
正面図、（Ｂ）は同磁性エンコーダにおける芯金の要部
正面図である。FIG. 5A is a front view of a main part of a core in the magnetic encoder, and FIG. 5B is a front view of a main part of a core in the magnetic encoder.
【図６】同磁気エンコーダにおける弾性部材の要部裏面
図である。FIG. 6 is a rear view of a main part of an elastic member in the magnetic encoder.
【図７】この発明の他の実施形態にかかる磁気エンコー
ダの部分断面図である。FIG. 7 is a partial sectional view of a magnetic encoder according to another embodiment of the present invention.
【図８】この発明のさらに他の実施形態にかかる磁気エ
ンコーダの部分断面図である。FIG. 8 is a partial sectional view of a magnetic encoder according to still another embodiment of the present invention.
【図９】この発明のさらに他の実施形態にかかる磁気エ
ンコーダの部分断面図である。FIG. 9 is a partial cross-sectional view of a magnetic encoder according to still another embodiment of the present invention.
【図１０】この発明のさらに他の実施形態にかかる磁気
エンコーダの部分断面図である。FIG. 10 is a partial sectional view of a magnetic encoder according to still another embodiment of the present invention.
【図１１】この発明のさらに他の実施形態にかかるラジ
アル型の磁気エンコーダを具備する車輪用軸受を設置し
た車輪支持装置の断面図である。FIG. 11 is a cross-sectional view of a wheel support device provided with a wheel bearing having a radial magnetic encoder according to still another embodiment of the present invention.
【図１２】同磁気エンコーダの部分拡大断面図である。FIG. 12 is a partially enlarged cross-sectional view of the magnetic encoder.
【図１３】同磁気エンコーダにおける芯金の部分正面図
である。FIG. 13 is a partial front view of a core in the magnetic encoder.
【図１４】同磁気エンコーダにおける弾性部材の部分平
面図である。FIG. 14 is a partial plan view of an elastic member in the magnetic encoder.
【図１５】この発明のさらに他の実施形態にかかる磁気
エンコーダの部分断面図である。FIG. 15 is a partial sectional view of a magnetic encoder according to still another embodiment of the present invention.
【図１６】この発明のさらに他の実施形態にかかる磁気
エンコーダの部分断面図である。FIG. 16 is a partial sectional view of a magnetic encoder according to still another embodiment of the present invention.
【図１７】従来の磁気エンコーダを具備する車輪用軸受
の部分拡大断面図である。FIG. 17 is a partially enlarged cross-sectional view of a bearing for a wheel including a conventional magnetic encoder.
１…内方部材 ２…外方部材 １ａ，２ａ…転走面 ３…転動体 ５…シール装置 ６ａ…フランジ １１…第１のシール板（芯金） １２…第２のシール板 １１ａ，１２ａ…円筒部 １１ｂ，１２ｂ…立板部 １４…弾性部材 １４ａ，１４ｂ…凸部 １６…弾性部材 １６ａ…サイドリップ １６ｂ，１６ｃ…ラジアルリップ １８…係止部 １９ａ…凸部 １９ｂ…凹部 ２０…磁気エンコーダ ２１…通孔 ２２…薄板 ６２…芯金 ６４…弾性部材 ６４ａ，６４ｂ…凸部 ６４ｂ…凸部 ７０…磁気エンコーダ ７２…薄板 ７６…通孔 ７９ａ…凸部 ７９ｂ…凹部 DESCRIPTION OF SYMBOLS 1 ... Inner member 2 ... Outer member 1a, 2a ... Rolling surface 3 ... Roller element 5 ... Seal device 6a ... Flange 11 ... First seal plate (core metal) 12 ... Second seal plate 11a, 12a ... Cylindrical part 11b, 12b standing plate part 14 elastic member 14a, 14b convex part 16 elastic member 16a side lip 16b, 16c radial lip 18 locking part 19a convex part 19b concave part 20 magnetic encoder 21 ... Through hole 22 ... Thin plate 62 ... Core bar 64 ... Elastic member 64a, 64b ... Convex portion 64b ... Convex portion 70 ... Magnetic encoder 72 ... Thin plate 76 ... Through hole 79a ... Convex portion 79b ... Concave portion
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｆ１６Ｃ 33/78 Ｆ１６Ｃ 33/78 Ｚ // Ｇ０１Ｄ 5/245 Ｇ０１Ｄ 5/245 Ｖ Ｆターム(参考） 2F077 AA46 NN02 NN09 NN18 PP05 VV23 VV31 3J016 AA01 BB03 CA01 3J101 AA01 AA32 AA43 AA54 AA62 BA53 BA54 BA56 BA64 BA73 BA77 EA01 EA49 EA74 EA77 FA23 FA48 GA03 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) F16C 33/78 F16C 33/78 Z // G01D 5/245 G01D 5/245 VF term (reference) 2F077 AA46 NN02 NN09 NN18 PP05 VV23 VV31 3J016 AA01 BB03 CA01 3J101 AA01 AA32 AA43 AA54 AA62 BA53 BA54 BA56 BA64 BA73 BA77 EA01 EA49 EA74 EA77 FA23 FA48 GA03
Claims (7)
磁性体粉を混入した弾性部材とを有し、この弾性部材の
周方向に交互に磁極を形成してなる磁気エンコーダにお
いて、上記弾性部材を芯金に対して着脱自在に装着した
ことを特徴とする磁気エンコーダ。1. A magnetic encoder comprising: an annular core made of a steel plate; and an elastic member in which a magnetic powder is mixed with the core, wherein magnetic poles are alternately formed in a circumferential direction of the elastic member. A magnetic encoder, wherein the elastic member is detachably attached to a cored bar.
求項１に記載の磁気エンコーダ。2. The magnetic encoder according to claim 1, wherein a locking portion is provided on a peripheral edge of said elastic member.
の凹凸部における凹部に弾性的に係合する凸部を上記弾
性部材に一体形成した請求項２に記載の磁気エンコー
ダ。3. The magnetic encoder according to claim 2, wherein an uneven portion is formed on a peripheral portion of the core bar, and a convex portion elastically engaging with a concave portion in the uneven portion is formed integrally with the elastic member.
凸部を上記芯金に形成した通孔に弾性的に圧入した請求
項１ないし請求項３のいずれかに記載の磁気エンコー
ダ。4. The magnetic encoder according to claim 1, wherein a convex portion is formed integrally with the elastic member, and the convex portion is elastically press-fitted into a through hole formed in the cored bar.
面を覆う非磁性体からなる薄板を固着した請求項１ない
し請求項４のいずれかに記載の磁気エンコーダ。5. The magnetic encoder according to claim 1, wherein a thin plate made of a non-magnetic material that covers a detection surface of the elastic member is fixed to the elastic member.
載の磁気エンコーダを具備する車輪用軸受。6. A wheel bearing comprising the magnetic encoder according to claim 1.
面に形成した外方部材と、この外方部材の転走面と対向
する転走面および車輪取付けフランジを形成した内方部
材と、これら両転走面間に介在された複列の転動体とを
備え、車体に対して車輪を回転自在に支持する車輪用軸
受であって、 上記外方部材と内方部材との環状空間を密封するシール
装置を設け、このシール装置は、断面Ｌ字状をなし、上
記外方部材または内方部材のうちの回転側部材に嵌合さ
れる第１のシール板と、この第１のシール板に対向し、
上記外方部材の端部に嵌合される断面Ｌ字状の第２のシ
ール板とからなり、上記第１のシール板の立板部に摺接
するサイドリップ、および円筒部に摺接するラジアルリ
ップが上記第２のシール板に加硫接着され、上記第１の
シール板が上記芯金となり、その立板部に磁気エンコー
ダが形成される請求項６に記載の車輪用軸受。7. The wheel bearing includes an outer member having a double-row rolling surface formed on an inner peripheral surface, a rolling surface facing the rolling surface of the outer member, and a wheel mounting flange. A wheel bearing comprising an inner member and a double row of rolling elements interposed between the two rolling surfaces, the wheel bearing rotatably supporting the wheel with respect to the vehicle body, wherein the outer member and the inner member A sealing device that seals an annular space with the first sealing plate, the sealing device has an L-shaped cross section, and is fitted to a rotation-side member of the outer member or the inner member; Facing the first seal plate,
A side lip sliding on an upright portion of the first seal plate and a radial lip sliding on a cylindrical portion, the second lip comprising a second sealing plate having an L-shaped cross section fitted to an end of the outer member; 7. The wheel bearing according to claim 6, wherein the first seal plate is vulcanized and bonded to the second seal plate, the first seal plate serves as the core bar, and a magnetic encoder is formed on an upright portion thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001143033A JP2002340921A (en) | 2001-05-14 | 2001-05-14 | Magnetic encoder and bearing for wheel provided with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001143033A JP2002340921A (en) | 2001-05-14 | 2001-05-14 | Magnetic encoder and bearing for wheel provided with it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002340921A true JP2002340921A (en) | 2002-11-27 |
Family
ID=18989238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001143033A Pending JP2002340921A (en) | 2001-05-14 | 2001-05-14 | Magnetic encoder and bearing for wheel provided with it |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002340921A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007032640A (en) * | 2005-07-25 | 2007-02-08 | Nsk Ltd | Bearing unit for wheel |
| JP2007270992A (en) * | 2006-03-31 | 2007-10-18 | Nok Corp | Sealing device |
| WO2008053663A1 (en) * | 2006-11-01 | 2008-05-08 | Ntn Corporation | Magnetic encoder and rolling bearing |
| DE112006003635T5 (en) | 2006-01-11 | 2008-11-27 | Uchiyama Manufacturing Corp. | Pole wheel and method for its production |
-
2001
- 2001-05-14 JP JP2001143033A patent/JP2002340921A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007032640A (en) * | 2005-07-25 | 2007-02-08 | Nsk Ltd | Bearing unit for wheel |
| DE112006003635T5 (en) | 2006-01-11 | 2008-11-27 | Uchiyama Manufacturing Corp. | Pole wheel and method for its production |
| JP2007270992A (en) * | 2006-03-31 | 2007-10-18 | Nok Corp | Sealing device |
| WO2007122919A1 (en) * | 2006-03-31 | 2007-11-01 | Nok Corporation | Sealing device |
| US8087673B2 (en) | 2006-03-31 | 2012-01-03 | Nok Corporation | Sealing device |
| US8353519B2 (en) | 2006-03-31 | 2013-01-15 | Nok Corporation | Sealing device |
| KR101364677B1 (en) | 2006-03-31 | 2014-02-19 | 엔오케이 가부시키가이샤 | Sealing device |
| WO2008053663A1 (en) * | 2006-11-01 | 2008-05-08 | Ntn Corporation | Magnetic encoder and rolling bearing |
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