JP2004211841A - Bearing device with sensor - Google Patents

Bearing device with sensor Download PDF

Info

Publication number
JP2004211841A
JP2004211841A JP2003001159A JP2003001159A JP2004211841A JP 2004211841 A JP2004211841 A JP 2004211841A JP 2003001159 A JP2003001159 A JP 2003001159A JP 2003001159 A JP2003001159 A JP 2003001159A JP 2004211841 A JP2004211841 A JP 2004211841A
Authority
JP
Japan
Prior art keywords
sensor
holding member
bearing device
cover
positioning pins
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
Application number
JP2003001159A
Other languages
Japanese (ja)
Other versions
JP4304983B2 (en
Inventor
Mamoru Aoki
護 青木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NSK Ltd
Original Assignee
NSK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NSK Ltd filed Critical NSK Ltd
Priority to JP2003001159A priority Critical patent/JP4304983B2/en
Priority to PCT/JP2003/013649 priority patent/WO2004038426A1/en
Priority to EP20030775816 priority patent/EP1557676B1/en
Priority to EP15159870.3A priority patent/EP2913679B1/en
Priority to US10/532,985 priority patent/US7249891B2/en
Publication of JP2004211841A publication Critical patent/JP2004211841A/en
Priority to US11/812,114 priority patent/US20080101740A1/en
Application granted granted Critical
Publication of JP4304983B2 publication Critical patent/JP4304983B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively provide a bearing device with a sensor of high detecting accuracy by easily positioning a sensor with high accuracy without performing the complicated processing such as insert molding of resin and the like. <P>SOLUTION: This bearing device 10 with the sensor is constituted by fitting a sensor main body 22 of the sensor 20 to a sensor mounting groove 21a formed on a specific position along the circumferential direction in a sensor holding member 21 with predetermined fastening margin by elastic deformation of the sensor holding member 21. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、センサ付軸受装置に関し、詳しくは回転体の支持と同時に回転体の回転速度や位相状態を検出するためのセンサ付軸受装置の改良に関する。
【０００２】
【従来の技術】
従来、図５及び図６に示すようなセンサ付軸受装置が知られている。図５は、センサ付軸受装置の全体断面図を示し、図６は、図５のセンサ付軸受装置のＡ−Ａ線断面図を示している。センサ付軸受装置３０は、センサ４０の一端部４１を静止側軌道輪３１の基準面３１ａに直接接触させるとともに、センサ４０の面取り部４２をセンサ保持要素３２の切欠面３３で固定することにより、センサ４０を位置決めするものが記載されている（例えば、特開平１０−３１１７４０号公報）。
【０００３】
【特許文献１】
特開平１０−３１１７４０号公報
【０００４】
【発明が解決しようとする課題】
上述した従来の情報センサ付き転がり軸受３０では、接続出力部３４や導体３５に外部から力が加わり、又は振動が加わることによって、センサ４０が円周方向に位置ずれしてしまうという問題があった。このとき、センサ４０の円周方向の位置ずれに起因して、センサ４０の出力誤差が発生する可能性があった。
【０００５】
そこで上記公報には、センサ保持要素３２と静止側軌道輪３１の基準面３１ａとの間に樹脂をインサート成形することにより、センサ４０の円周方向の位置ずれを抑制することも記載されている。しかし、樹脂のインサート成形等によると、複雑な加工を必要とするため、製造工数及びコスト増大を招くという点で改善の余地があった。
【０００６】
本発明は、上記事情に鑑みてなされたもので、その目的は、樹脂のインサート成形等の複雑な加工を必要とすることなく、センサを容易かつ高精度に位置決めすることができ、これにより低コストで高い検出精度を有するセンサ付軸受装置を提供することにある。
【０００７】
【課題を解決するための手段】
本発明の上記目的は、保持器に保持された複数の転動体を一対の軌道輪間に転動自在に組み込まれてなる転がり軸受において、支持する回転軸の状態又は転がり軸受の状態を検出するセンサと、固定側軌道輪の軸方向一端面に固定される環状のセンサカバーと、センサカバーに固定された環状のセンサ保持部材とを備え、センサが、センサ保持部材における円周方向に沿う所定の位置に設けられたセンサ取付溝に、センサ保持部材の弾性変形によって所定の締め代で嵌合されることを特徴とするセンサ付軸受装置によって達成される。
【０００８】
上記のセンサ付軸受装置によれば、センサは、センサ保持部材に設けられたセンサ取付溝に、締め代がセンサ保持部材の弾性変形を受けることで、センサ保持部材に固定される。このため、センサを固定するために樹脂のインサートや接着等を用いる必要がない。したがって、容易かつ高精度に位置決めされる。
【０００９】
上記センサ付軸受装置は、センサ保持部材が、センサカバーの内方に所定のすきまをもって嵌合されることが好ましい。こうすれば、温度変化によるセンサ保持部材の膨張収縮によるセンサカバーの変形を防止することができ、センサカバーが固定側軌道輪（例えば、外輪）から脱落したり、固定側軌道輪を変形させることを防止することができる。
【００１０】
上記センサ付軸受装置は、センサ保持部材には、複数の位置決めピンが円周方向に所定の間隔をあけて、それぞれ軸方向に沿って突出するように形成され、かつ、センサカバーの、複数の位置決めピンに対応するそれぞれの位置には、複数の嵌合孔が形成され、複数の位置決めピンがそれぞれ対応する複数の嵌合孔に嵌挿されることにより、センサカバーとセンサ保持部材とが位置決めされることが好ましい。
こうすれば、各位置決めピンを対応する嵌合孔にそれぞれ嵌挿すると、インサート成形等の複雑な加工を必要とすることなく、センサカバーとセンサ保持部材とが高精度に位置決めすることができる。
【００１１】
上記のセンサ付軸受装置は、複数の位置決めピンが、複数の嵌合孔にそれぞれ挿通され、複数の嵌合孔を貫通した複数の位置決めピンの先端部がそれぞれ塑性変形されることにより、センサカバーとセンサ保持部材とが固定されることが好ましい。
ここで、塑性変形の具体例としては、加熱による熱変形、レーザ溶着、超音波溶着等が挙げられる。
こうすれば、塑性変形された箇所によって位置決めピンが嵌合孔から脱落することが防止される。したがって、上記のセンサ付軸受装置は、振動等の外力が加わった場合でも、センサの脱落や位置ずれが確実に防止できる。
【００１２】
上記のセンサ付軸受装置は、複数の嵌合孔の周縁部が、センサ保持部材側に突出する突部を形成し、突部でのみ、センサカバーとセンサ保持部材とが係合されることが好ましい。
こうすれば、各嵌合孔周囲の係合圧が高く保持され、位置決めピンの機能が高められる。
【００１３】
上記のセンサ付軸受装置は、センサカバーとセンサ保持部材との間には、センサの回路基板が挟持されており、センサ保持部材の複数の位置決めピンが、回路基板における対応する位置に設けられた貫通孔を貫通して、各嵌合孔に嵌挿されることが好ましい。
こうすれば、センサカバーとセンサ保持部材とが位置決めされるとともに、回路基板に形成された貫通孔に位置決めピンが挿通されるため、回路基板が、センサカバーとセンサ保持部材との間に高精度に位置決めされ、保持される。
また、センサカバーとセンサ保持部材又は回路基板とが嵌合孔の周縁部の突部においてのみ係合する構成である。このため、回路基板とセンサカバーとが互いに接触する部位を、例えば回路基板の回路以外の部位に限定することが可能となる。したがって、回路基板の回路とセンサカバーとの接触による短絡を確実に防止できる。
【００１４】
【発明の実施の形態】
以下、図示実施形態により、本発明を説明する。
図１は、本発明の一実施形態であるセンサ付軸受装置を示す断面図であり、図２は、図１のセンサ付軸受装置の要部拡大断面図、図３は、図１のセンサ付軸受装置のセンサカバー、センサ保持部材及び回路基板を示す分解斜視図、図４は、センサ保持部材のセンサ取付溝付近を示す要部拡大斜視図である。
【００１５】
図１に示すように、センサ付軸受装置１０は、保持器１４にそれぞれ保持された複数の転動体１１を、回転側軌道輪である内輪１２及び固定側軌道輪である外輪１３間に組み込まれて構成される。センサ付軸受装置１０における軸方向一端面側（図１中右端面側）には、センサ２０が設けられる。
【００１６】
センサ２０は、円環状のセンサ保持部材２１に支持されたセンサ本体２２と、後述する回路基板２３と、磁性材からなる芯金２４を介して内輪（可動側の軌道輪）１２に固定された多極マグネット（エンコーダ）２５とを備えており、センサカバー２６内に収容されている。
多極マグネット２５は、内輪１２と一体的に回転する。センサ本体２２は、多極マグネット２５の回転方向の移動と回転数が検出可能となるように２つのホールＩＣが所定の角度を持って取り付けられている。なお、２つのホールＩＣの角度は出力波形の位相が電気角で９０°になるように設置するのが好ましい。
【００１７】
図２に示すように、センサカバー２６は、例えば磁性材である金属板を板金加工して成形されており、内方にセンサ２０を収容可能な環状部２６ａと、環状部２６ａの軸方向一端側（図２中左側）に設けられたフランジ部２６ｂと、環状部２６ａの軸方向他端側（図２中右側）に設けられた側面部２６ｃとから構成されている。センサカバー２６は、フランジ部２６ｂを転がり軸受１０の外輪（固定側の軌動輪）１３の外周縁部に嵌合されることにより、外輪１３に固定される。
【００１８】
センサ保持部材２１は、例えば合成樹脂からなり、所定の弾性を有し、センサカバー２６の内方に嵌合される。このとき、センサ保持部材２１の外径面がセンサカバー２６の内周面に所定のすきまを持って嵌合する。センサ保持部材２１には、図４に示すように、センサ取付溝２１ａが、円周方向に沿う所定の位置に設けられる。センサ取付溝２１ａには、センサ本体２２の軸方向位置を制限する段部２１ｃが設けられている。センサ取付溝２１ａには、センサ本体２２が、センサ保持部材２１の弾性変形により、所定の締め代をもって嵌合（スナップ係合）される。センサ本体２２は、底面２２ｂ、側面２２ｃ及び傾斜面２２ｄを、センサ取付溝２１ａのそれぞれ対応する面に係合するように嵌合された状態で取り付けられる。このとき、センサ本体２２は、先端面２２ａがセンサ保持部材２１におけるセンサ取付溝２１ａ縁部の面２１ｂより僅かに突出するように取り付けられている。このため、図１に示すように、センサ２２の先端面２２ａが径方向において内輪１２の多極マグネット２５側に近づくので、センサ２２の検出精度がより一層向上する。
【００１９】
図１から図３に示すように、センサ保持部材２１には、複数の位置決めピン２７が、円周方向に所定の間隔をあけて、それぞれ軸方向に沿って突出するように設けられている。センサカバー２６には、複数の嵌合孔２６ｄが円周方向に所定の間隔をあけて設けられている。各位置決めピン２７は、対応する嵌合孔２６ｄにそれぞれ嵌挿される。そして、各位置決めピン２７が各嵌合孔２６ｄを貫通することにより、センサカバー２６とセンサ保持部材２１とが位置決めされる。また、各嵌合孔２６ｄに貫通された各位置決めピン２７の先端部（図２中右端部）がそれぞれ塑性変形されることにより、センサカバー２６とセンサ保持部材２１とが互いに固定される。
なお、各位置決めピン２７の先端部はそれぞれ、塑性変形により平面部２７ａを有する半球状となる。このとき、平面部２７ａは、センサカバー２６の側面部２６ｃより僅かに内側（図２中左側）に位置する。また、塑性変形の具体例としては、加熱による熱変形、レーザ溶着、超音波溶着等が挙げられる。
【００２０】
各嵌合孔２６ｄはそれぞれ、センサカバー２６における各位置決めピン２７に対応する位置に、軸方向（図１中左右方向）に沿って複数穿設されている。センサカバー２６における各嵌合孔２６ｄの周縁部は、センサ保持部材２１側（図１中左側）に突出する突部２６ｅを形成する。この突部２６ｅにおいて、センサカバー２６とセンサ保持部材２１又は回路基板２３とが係合し、突部２６ｅ以外の箇所に接触しないように構成される。
【００２１】
また図１及び図３を参照すると、回路基板２３は、センサカバー２６の嵌合孔２６ｄに嵌挿されるセンサ保持部材２１の位置決めピン２７を、対応する位置に穿設された貫通孔２３ａに貫通され、センサカバー２６とセンサ保持部材２１との間に挟持される。回路基板２３には、センサ本体２２による検出信号を処理する電子回路（図示しない）が実装されている。回路基板２３とセンサカバー２６との接触部位は、センサカバー２６における各嵌合孔２６ｄの周縁部に形成された突部２６ｅによって、回路基板２３の電子回路以外の部位に限定されている。これにより、回路基板２３の電子回路とセンサカバー２６との接触による短絡が防止される。
【００２２】
本実施形態のセンサ付軸受装置の作用を説明する。
センサ２０のセンサ本体２２は、センサ保持部材２１における円周方向に沿う所定の位置に設けられたセンサ取付溝２１ａに、センサ保持部材２１の弾性変形に伴って所定の締め代を以って嵌合され、容易かつ高精度に位置決めされる。センサ保持部材は、センサカバーの内方に、所定のすきまをもって嵌合されている。
また、センサ保持部材２１の各位置決めピン２７が、対応するセンサカバー２６の嵌合孔２６ｄにそれぞれ嵌挿され、インサート成形等の複雑な加工を必要とすることなく、センサカバー２６とセンサ保持部材２１とが高精度に位置決めされる。
さらに、センサ保持部材２１の各位置決めピン２７が、センサカバー２６の各嵌合孔２６ｄにそれぞれ嵌挿された状態で各嵌合孔２６ｄを貫通しており、かつ、貫通した各位置決めピン２７の先端部がそれぞれ塑性変形される。したがって、振動等の外力が加わった場合でも、センサ本体２２の脱落や位置ずれが確実に防止される。
【００２３】
センサ保持部材２１の各位置決めピン２７は、回路基板２３における対応する位置に設けられた貫通孔２３ａを貫通して、センサカバー２６の対応する各嵌合孔２６ｄに嵌挿される。したがって回路基板２３が、センサカバー２６とセンサ保持部材２１との間に高精度に位置決めされ、保持される。
また、センサカバー２６における各嵌合孔２６ｄの周縁部が、センサ保持部材２１側に突出する突部２６ｅを形成し、該突部２６ｅでのみ、センサカバー２６とセンサ保持部材２１又は回路基板２３とが係合される。したがって、センサカバー２６と回路基板２３との接触部位は、回路基板２３の電子回路以外の部位に限定される。これにより、回路基板２３の電子回路とセンサカバー２６との接触による短絡が確実に防止される。
【００２４】
本実施形態のセンサ付軸受装置１０において、センサ２０のセンサ本体２２が、センサ保持部材２１における円周方向に沿う所定の位置に設けられたセンサ取付溝２１ａに、センサ保持部材２１の弾性変形により、所定の締め代で嵌合される。したがって、樹脂のインサート成形等の複雑な加工を必要とすることなく、センサ本体２２を容易かつ高精度に位置決めすることができ、これにより低コストで高い検出精度を有するセンサ付軸受装置１０を提供することができる。
【００２５】
【発明の効果】
以上説明したように、本発明によれば、樹脂のインサート成形等の複雑な加工を必要とすることなく、センサを容易かつ高精度に位置決めすることができ、これにより低コストで高い検出精度を有するセンサ付軸受装置を提供することができる。
【図面の簡単な説明】
【図１】本発明の一実施形態であるセンサ付軸受装置を示す断面図である。
【図２】図１のセンサ付軸受装置の要部拡大断面図である。
【図３】図１のセンサ付軸受装置のセンサカバー、センサ保持部材及び回路基板を示す分解斜視図である。
【図４】センサ保持部材のセンサ取付溝付近を示す要部拡大斜視図である。
【図５】従来のセンサ付軸受装置を示す断面図である。
【図６】図５のセンサ付軸受装置のＡ―Ａ線断面図である。
【符号の説明】
１０ センサ付軸受装置
１１ 転動体
１２ 可動側の軌道輪（内輪）
１３ 固定側の軌道輪（外輪）
１４ 保持器
２０ センサ
２１ センサ保持部材
２１ａ センサ取付溝
２１ｂ 縁部の面
２１ｃ 段部
２２ センサ本体
２２ａ 先端面
２２ｂ 底面
２２ｃ 側面
２２ｄ 傾斜面
２３ 回路基板
２４ 芯金
２５ 多極マグネット
２６ センサカバー
２６ａ 環状部
２６ｂ フランジ部
２６ｃ 側面部
２６ｄ 嵌合孔
２６ｅ 凸状部
２７ 位置決めピン
２７ａ 平面部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bearing device with a sensor, and more particularly to an improvement of a bearing device with a sensor for detecting a rotation speed and a phase state of a rotating body while supporting the rotating body.
[0002]
[Prior art]
Conventionally, a bearing device with a sensor as shown in FIGS. 5 and 6 is known. FIG. 5 is an overall sectional view of the bearing device with a sensor, and FIG. 6 is a sectional view taken along line AA of the bearing device with the sensor of FIG. The sensor-equipped bearing device 30 makes the one end 41 of the sensor 40 directly contact the reference surface 31a of the stationary raceway 31 and fixes the chamfered portion 42 of the sensor 40 with the cutout surface 33 of the sensor holding element 32. A device for positioning the sensor 40 is described (for example, JP-A-10-31740).
[0003]
[Patent Document 1]
JP 10-31740 A
[Problems to be solved by the invention]
In the conventional rolling bearing 30 with an information sensor described above, there is a problem that the sensor 40 is displaced in the circumferential direction due to external force or vibration applied to the connection output portion 34 and the conductor 35. . At this time, there is a possibility that an output error of the sensor 40 occurs due to a circumferential displacement of the sensor 40.
[0005]
Therefore, the above-mentioned publication also describes that the resin 40 is insert-molded between the sensor holding element 32 and the reference surface 31a of the stationary raceway 31 to suppress the displacement of the sensor 40 in the circumferential direction. . However, according to resin insert molding or the like, since complicated processing is required, there is room for improvement in that the number of manufacturing steps and costs are increased.
[0006]
The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to position a sensor easily and with high accuracy without requiring complicated processing such as resin insert molding. An object of the present invention is to provide a sensor-equipped bearing device having high detection accuracy at a low cost.
[0007]
[Means for Solving the Problems]
An object of the present invention is to detect a state of a rotating shaft to be supported or a state of a rolling bearing in a rolling bearing in which a plurality of rolling elements held by a cage are rollably incorporated between a pair of races. A sensor, an annular sensor cover fixed to one axial end surface of the fixed raceway, and an annular sensor holding member fixed to the sensor cover, wherein the sensor has a predetermined shape along a circumferential direction of the sensor holding member. This is achieved by a sensor-equipped bearing device characterized in that it is fitted into a sensor mounting groove provided at a predetermined position by a predetermined interference by elastic deformation of a sensor holding member.
[0008]
According to the above-described bearing device with a sensor, the sensor is fixed to the sensor holding member by receiving the interference in the sensor mounting groove provided in the sensor holding member by elastic deformation of the sensor holding member. For this reason, it is not necessary to use a resin insert or an adhesive for fixing the sensor. Therefore, positioning is performed easily and with high accuracy.
[0009]
In the bearing device with a sensor, it is preferable that the sensor holding member is fitted inside the sensor cover with a predetermined clearance. With this configuration, it is possible to prevent the sensor cover from being deformed due to expansion and contraction of the sensor holding member due to a temperature change. Can be prevented.
[0010]
In the sensor-equipped bearing device, a plurality of positioning pins are formed on the sensor holding member so as to protrude along the axial direction at predetermined intervals in the circumferential direction, and a plurality of sensor covers are provided. A plurality of fitting holes are formed at respective positions corresponding to the positioning pins, and the sensor cover and the sensor holding member are positioned by fitting the plurality of positioning pins into the corresponding plurality of fitting holes. Preferably.
With this configuration, when each positioning pin is inserted into the corresponding fitting hole, the sensor cover and the sensor holding member can be positioned with high accuracy without requiring complicated processing such as insert molding.
[0011]
In the above bearing device with a sensor, the plurality of positioning pins are respectively inserted into the plurality of fitting holes, and the distal ends of the plurality of positioning pins penetrating through the plurality of fitting holes are each plastically deformed, so that the sensor cover is provided. And the sensor holding member are preferably fixed.
Here, specific examples of the plastic deformation include thermal deformation by heating, laser welding, ultrasonic welding, and the like.
This prevents the positioning pin from dropping out of the fitting hole due to the plastically deformed portion. Therefore, the above-described bearing device with a sensor can reliably prevent the sensor from falling off or being displaced even when an external force such as vibration is applied.
[0012]
In the bearing device with a sensor described above, the periphery of the plurality of fitting holes may form a protrusion protruding toward the sensor holding member, and the sensor cover and the sensor holding member may be engaged only with the protrusion. preferable.
In this case, the engagement pressure around each fitting hole is kept high, and the function of the positioning pin is enhanced.
[0013]
In the above bearing device with a sensor, the circuit board of the sensor is sandwiched between the sensor cover and the sensor holding member, and a plurality of positioning pins of the sensor holding member are provided at corresponding positions on the circuit board. It is preferable to pass through the through hole and be fitted into each fitting hole.
With this configuration, the sensor cover and the sensor holding member are positioned, and the positioning pins are inserted into the through holes formed in the circuit board. Is positioned and held.
Further, the sensor cover and the sensor holding member or the circuit board are configured to engage with each other only at the protrusion at the peripheral edge of the fitting hole. For this reason, the part where the circuit board and the sensor cover contact each other can be limited to, for example, a part other than the circuit of the circuit board. Therefore, a short circuit due to contact between the circuit of the circuit board and the sensor cover can be reliably prevented.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described with reference to the illustrated embodiments.
FIG. 1 is a sectional view showing a bearing device with a sensor according to an embodiment of the present invention. FIG. 2 is an enlarged sectional view of a main part of the bearing device with a sensor of FIG. 1, and FIG. FIG. 4 is an exploded perspective view showing a sensor cover, a sensor holding member, and a circuit board of the bearing device. FIG. 4 is an enlarged perspective view of a main part showing the vicinity of a sensor mounting groove of the sensor holding member.
[0015]
As shown in FIG. 1, in a bearing device with a sensor 10, a plurality of rolling elements 11 each held by a retainer 14 are incorporated between an inner ring 12 as a rotating raceway and an outer race 13 as a fixed raceway ring. It is composed. The sensor 20 is provided on one axial end face side (the right end face side in FIG. 1) of the sensor-equipped bearing device 10.
[0016]
The sensor 20 is fixed to the inner ring (movable-side race ring) 12 via a sensor main body 22 supported by an annular sensor holding member 21, a circuit board 23 described later, and a core metal 24 made of a magnetic material. A multi-pole magnet (encoder) 25 is provided and housed in a sensor cover 26.
The multi-pole magnet 25 rotates integrally with the inner ring 12. The sensor main body 22 has two Hall ICs attached at a predetermined angle so that the movement of the multipolar magnet 25 in the rotation direction and the number of rotations can be detected. It is preferable that the two Hall ICs are installed such that the phase of the output waveform is 90 electrical degrees.
[0017]
As shown in FIG. 2, the sensor cover 26 is formed by sheet metal processing of a metal plate, for example, a magnetic material, and has an annular portion 26 a capable of accommodating the sensor 20 inward, and one axial end of the annular portion 26 a. It is composed of a flange portion 26b provided on the side (left side in FIG. 2) and a side surface portion 26c provided on the other axial side (right side in FIG. 2) of the annular portion 26a. The sensor cover 26 is fixed to the outer ring 13 by fitting the flange portion 26 b to the outer peripheral edge of the outer ring (the fixed-side track wheel) 13 of the rolling bearing 10.
[0018]
The sensor holding member 21 is made of, for example, a synthetic resin, has a predetermined elasticity, and is fitted inside the sensor cover 26. At this time, the outer diameter surface of the sensor holding member 21 is fitted to the inner peripheral surface of the sensor cover 26 with a predetermined clearance. As shown in FIG. 4, the sensor holding member 21 is provided with a sensor mounting groove 21a at a predetermined position along the circumferential direction. The sensor mounting groove 21a is provided with a step 21c for limiting the axial position of the sensor body 22. The sensor main body 22 is fitted (snap-engaged) into the sensor mounting groove 21a with a predetermined interference by the elastic deformation of the sensor holding member 21. The sensor main body 22 is mounted in a state where the bottom surface 22b, the side surface 22c, and the inclined surface 22d are fitted so as to engage with the corresponding surfaces of the sensor mounting groove 21a. At this time, the sensor main body 22 is mounted such that the front end surface 22a slightly protrudes from the surface 21b of the edge of the sensor mounting groove 21a in the sensor holding member 21. For this reason, as shown in FIG. 1, the tip end surface 22a of the sensor 22 approaches the multi-pole magnet 25 side of the inner race 12 in the radial direction, so that the detection accuracy of the sensor 22 is further improved.
[0019]
As shown in FIGS. 1 to 3, a plurality of positioning pins 27 are provided on the sensor holding member 21 so as to protrude along the axial direction at predetermined intervals in the circumferential direction. A plurality of fitting holes 26d are provided in the sensor cover 26 at predetermined intervals in the circumferential direction. Each positioning pin 27 is inserted into a corresponding fitting hole 26d. The sensor cover 26 and the sensor holding member 21 are positioned by the positioning pins 27 passing through the fitting holes 26d. In addition, the sensor cover 26 and the sensor holding member 21 are fixed to each other by plastically deforming the tip end (the right end in FIG. 2) of each positioning pin 27 penetrated through each fitting hole 26d.
The tip of each positioning pin 27 becomes a hemisphere having a flat portion 27a due to plastic deformation. At this time, the flat portion 27a is located slightly inside (the left side in FIG. 2) from the side surface portion 26c of the sensor cover 26. Specific examples of the plastic deformation include thermal deformation by heating, laser welding, ultrasonic welding, and the like.
[0020]
A plurality of fitting holes 26d are respectively formed in the sensor cover 26 at positions corresponding to the positioning pins 27 along the axial direction (the left-right direction in FIG. 1). A peripheral portion of each fitting hole 26d in the sensor cover 26 forms a protrusion 26e protruding toward the sensor holding member 21 (left side in FIG. 1). The sensor cover 26 and the sensor holding member 21 or the circuit board 23 are engaged with each other at the protrusion 26e, and are configured so as not to come into contact with a portion other than the protrusion 26e.
[0021]
1 and 3, the circuit board 23 passes the positioning pins 27 of the sensor holding member 21 inserted into the fitting holes 26d of the sensor cover 26 through the through holes 23a formed at corresponding positions. Then, it is sandwiched between the sensor cover 26 and the sensor holding member 21. An electronic circuit (not shown) for processing a detection signal from the sensor main body 22 is mounted on the circuit board 23. The contact portion between the circuit board 23 and the sensor cover 26 is limited to a portion other than the electronic circuit of the circuit board 23 by a protrusion 26e formed on the periphery of each fitting hole 26d in the sensor cover 26. As a result, a short circuit caused by contact between the electronic circuit of the circuit board 23 and the sensor cover 26 is prevented.
[0022]
The operation of the sensor-equipped bearing device of the present embodiment will be described.
The sensor main body 22 of the sensor 20 is fitted in a sensor mounting groove 21 a provided at a predetermined position along the circumferential direction of the sensor holding member 21 with a predetermined interference with the elastic deformation of the sensor holding member 21. Combined and positioned easily and with high precision. The sensor holding member is fitted inside the sensor cover with a predetermined clearance.
Further, the respective positioning pins 27 of the sensor holding member 21 are respectively fitted into fitting holes 26d of the corresponding sensor cover 26, and the sensor cover 26 and the sensor holding member can be inserted without requiring complicated processing such as insert molding. 21 are positioned with high accuracy.
Further, each positioning pin 27 of the sensor holding member 21 penetrates each fitting hole 26d in a state of being fitted into each fitting hole 26d of the sensor cover 26, respectively. The tips are each plastically deformed. Therefore, even when an external force such as vibration is applied, the sensor main body 22 is reliably prevented from falling off or displaced.
[0023]
Each positioning pin 27 of the sensor holding member 21 passes through a through hole 23 a provided at a corresponding position on the circuit board 23, and is inserted into a corresponding fitting hole 26 d of the sensor cover 26. Therefore, the circuit board 23 is positioned and held between the sensor cover 26 and the sensor holding member 21 with high accuracy.
Further, a peripheral portion of each fitting hole 26d in the sensor cover 26 forms a protrusion 26e protruding toward the sensor holding member 21, and the sensor cover 26 and the sensor holding member 21 or the circuit board 23 are formed only by the protrusion 26e. Are engaged. Therefore, a contact portion between the sensor cover 26 and the circuit board 23 is limited to a portion of the circuit board 23 other than the electronic circuit. As a result, a short circuit caused by contact between the electronic circuit of the circuit board 23 and the sensor cover 26 is reliably prevented.
[0024]
In the sensor-equipped bearing device 10 of the present embodiment, the sensor main body 22 of the sensor 20 is inserted into the sensor mounting groove 21 a provided at a predetermined position along the circumferential direction of the sensor holding member 21 by elastic deformation of the sensor holding member 21. Are fitted with a predetermined interference. Therefore, the sensor main body 22 can be positioned easily and with high precision without requiring complicated processing such as insert molding of resin, thereby providing a bearing device 10 with a sensor having high detection accuracy at low cost. can do.
[0025]
【The invention's effect】
As described above, according to the present invention, the sensor can be positioned easily and with high accuracy without requiring complicated processing such as insert molding of a resin, thereby achieving high detection accuracy at low cost. A bearing device with a sensor having the above can be provided.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a bearing device with a sensor according to an embodiment of the present invention.
FIG. 2 is an enlarged sectional view of a main part of the bearing device with a sensor of FIG. 1;
FIG. 3 is an exploded perspective view showing a sensor cover, a sensor holding member, and a circuit board of the bearing device with a sensor of FIG. 1;
FIG. 4 is an enlarged perspective view of a main part showing the vicinity of a sensor mounting groove of a sensor holding member.
FIG. 5 is a sectional view showing a conventional bearing device with a sensor.
FIG. 6 is a sectional view taken along line AA of the bearing device with a sensor of FIG. 5;
[Explanation of symbols]
Reference Signs List 10 bearing device with sensor 11 rolling element 12 raceway ring (inner ring) on the movable side
13 Fixed side bearing ring (outer ring)
14 Cage 20 Sensor 21 Sensor holding member 21a Sensor mounting groove 21b Edge surface 21c Step 22 Sensor body 22a Tip surface 22b Bottom surface 22c Side surface 22d Inclined surface 23 Circuit board 24 Metal core 25 Multipole magnet 26 Sensor cover 26a Annular portion 26b Flange 26c Side 26d Fitting hole 26e Convex 27 Positioning pin 27a Flat

Claims (6)

保持器に保持された複数の転動体を一対の軌道輪間に転動自在に組み込まれてなる転がり軸受おいて、
支持する回転軸の状態又は転がり軸受の状態を検出するセンサと、
固定側軌道輪の軸方向一端面に固定される環状のセンサカバーと、
前記センサカバーに固定された環状のセンサ保持部材とを備え、
前記センサが、前記センサ保持部材における円周方向に沿う所定の位置に設けられたセンサ取付溝に、前記センサ保持部材の弾性変形によって所定の締め代で嵌合されることを特徴とするセンサ付軸受装置。In a rolling bearing in which a plurality of rolling elements held by a retainer are rollably incorporated between a pair of races,
A sensor for detecting the state of the rotating shaft to be supported or the state of the rolling bearing;
An annular sensor cover fixed to one axial end surface of the fixed side race,
An annular sensor holding member fixed to the sensor cover,
The sensor is provided, wherein the sensor is fitted into a sensor mounting groove provided at a predetermined position along a circumferential direction of the sensor holding member with a predetermined interference by elastic deformation of the sensor holding member. Bearing device. 前記センサ保持部材が、前記センサカバーの内方に該センサカバーの弾性変形により、所定のすきまをもって嵌合されることを特徴とする請求項１に記載のセンサ付軸受装置。The sensor-equipped bearing device according to claim 1, wherein the sensor holding member is fitted inside the sensor cover with a predetermined clearance by elastic deformation of the sensor cover. 前記センサ保持部材には、複数の位置決めピンが円周方向に所定の間隔をあけて、それぞれ軸方向に沿って突出するように形成され、かつ、前記センサカバーの、前記複数の位置決めピンに対応するそれぞれの位置には、複数の嵌合孔が形成され、
前記複数の位置決めピンがそれぞれ対応する前記複数の嵌合孔に嵌挿されることにより、前記センサカバーと前記センサ保持部材とが位置決めされることを特徴とする請求項１又は２に記載のセンサ付軸受装置。A plurality of positioning pins are formed on the sensor holding member so as to protrude along the axial direction at predetermined intervals in a circumferential direction, and correspond to the plurality of positioning pins of the sensor cover. At each position, a plurality of fitting holes are formed,
The sensor with the sensor according to claim 1, wherein the sensor cover and the sensor holding member are positioned by fitting the plurality of positioning pins into the corresponding plurality of fitting holes. Bearing device. 前記複数の位置決めピンが、前記複数の嵌合孔にそれぞれ挿通され、該複数の嵌合孔を貫通した前記複数の位置決めピンの先端部がそれぞれ塑性変形されることにより、前記センサカバーと前記センサ保持部材とが固定されることを特徴とする請求項３に記載のセンサ付軸受装置。The plurality of positioning pins are respectively inserted through the plurality of fitting holes, and the tip ends of the plurality of positioning pins that have passed through the plurality of fitting holes are each plastically deformed, so that the sensor cover and the sensor The bearing device with a sensor according to claim 3, wherein the holding member is fixed. 前記複数の嵌合孔の周縁部が、前記センサ保持部材側に突出する突部を形成し、該突部でのみ、前記センサカバーと前記センサ保持部材とが係合されることを特徴とする請求項３又は４に記載のセンサ付軸受装置。A peripheral portion of the plurality of fitting holes forms a protrusion protruding toward the sensor holding member, and the sensor cover and the sensor holding member are engaged only with the protrusion. The bearing device with the sensor according to claim 3. 前記センサカバーと前記センサ保持部材との間には、前記センサの回路基板が挟持されており、前記センサ保持部材の前記複数の位置決めピンが、前記回路基板における対応する位置に設けられた貫通孔を貫通して、各嵌合孔に嵌挿されることを特徴とする請求項３から５のいずれか１つに記載のセンサ付軸受装置。A circuit board of the sensor is sandwiched between the sensor cover and the sensor holding member, and the plurality of positioning pins of the sensor holding member are provided at corresponding positions in the circuit board. The bearing device with the sensor according to any one of claims 3 to 5, wherein the bearing device is inserted through the fitting hole into each fitting hole.
JP2003001159A 2002-10-28 2003-01-07 Bearing device with sensor Expired - Fee Related JP4304983B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2003001159A JP4304983B2 (en) 2003-01-07 2003-01-07 Bearing device with sensor
PCT/JP2003/013649 WO2004038426A1 (en) 2002-10-28 2003-10-24 Bearing device with sensor and rolling bearing with sensor
EP20030775816 EP1557676B1 (en) 2002-10-28 2003-10-24 Rolling bearing with sensor
EP15159870.3A EP2913679B1 (en) 2002-10-28 2003-10-24 Bearing apparatus with sensor and rolling bearing with sensor
US10/532,985 US7249891B2 (en) 2002-10-28 2003-10-24 Bearing device with sensor and rolling bearing with sensor
US11/812,114 US20080101740A1 (en) 2002-10-28 2007-06-15 Bearing device with sensor and rolling bearing with sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003001159A JP4304983B2 (en) 2003-01-07 2003-01-07 Bearing device with sensor

Publications (2)

Publication Number Publication Date
JP2004211841A true JP2004211841A (en) 2004-07-29
JP4304983B2 JP4304983B2 (en) 2009-07-29

Family

ID=32819256

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003001159A Expired - Fee Related JP4304983B2 (en) 2002-10-28 2003-01-07 Bearing device with sensor

Country Status (1)

Country Link
JP (1) JP4304983B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006189101A (en) * 2005-01-06 2006-07-20 Nsk Ltd Bearing device with sensor
WO2006122915A1 (en) * 2005-05-16 2006-11-23 Aktiebolaget Skf A device for assembling and disassembling a sensor in a bearing unit
JP2008190689A (en) * 2007-02-07 2008-08-21 Nsk Ltd Bearing with sensor
JP2017009042A (en) * 2015-06-23 2017-01-12 日本精工株式会社 Roller bearing with sensor, motor, vehicle and machinery device
JP2017015221A (en) * 2015-07-06 2017-01-19 日本精工株式会社 Rolling bearing with sensor, motor, vehicle and machine device
JP2017053389A (en) * 2015-09-08 2017-03-16 株式会社ジェイテクト Bering device for wheel

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006189101A (en) * 2005-01-06 2006-07-20 Nsk Ltd Bearing device with sensor
WO2006122915A1 (en) * 2005-05-16 2006-11-23 Aktiebolaget Skf A device for assembling and disassembling a sensor in a bearing unit
US8763227B2 (en) 2005-05-16 2014-07-01 Aktiebolaget Skf Device for assembling and disassembling a sensor in a bearing unit
JP2008190689A (en) * 2007-02-07 2008-08-21 Nsk Ltd Bearing with sensor
JP2017009042A (en) * 2015-06-23 2017-01-12 日本精工株式会社 Roller bearing with sensor, motor, vehicle and machinery device
JP2017015221A (en) * 2015-07-06 2017-01-19 日本精工株式会社 Rolling bearing with sensor, motor, vehicle and machine device
JP2017053389A (en) * 2015-09-08 2017-03-16 株式会社ジェイテクト Bering device for wheel

Also Published As

Publication number Publication date
JP4304983B2 (en) 2009-07-29

Similar Documents

Publication Publication Date Title
JP5085568B2 (en) Shaft support device for electric motor and its mounting method
JP2004257557A (en) Rolling bearing device with measuring function, its detecting assembly, and electric motor equipped therewith
US7290351B2 (en) Mounting bracket, rolling bearing and corresponding assembly method
WO2003044381A1 (en) Sensor-equipped rolling bearing, and rotation state detecting device
JP2009281788A (en) Rotation angle detector
US20120099811A1 (en) Bearing assembly with rotation sensor
JP2012186988A (en) Resolver and rolling bearing device with resolver
JP2006258542A (en) Bearing device having rotation sensor
JP4304983B2 (en) Bearing device with sensor
JP2003156060A (en) Rolling bearing with sensor
JP6728793B2 (en) Bearing device with sensor
JP2006207750A (en) Bearing with sensor and bearing device
JP2000142341A (en) Rotation supporting device with rotating speed detecting device
JP2002295465A (en) Rolling bearing with rotation sensor
JP4241069B2 (en) Bearing device with sensor
JP5321115B2 (en) Rolling bearing with rotation sensor
JP4443252B2 (en) Bearing with rotation sensor
JP2004361362A (en) Rolling bearing with rotation sensor
JP4385594B2 (en) Bearing device with sensor
JP2004218684A (en) Bearing device with sensor
JP4288990B2 (en) Bearing device with sensor
JP7106051B2 (en) Rotation detection device and method for manufacturing rotation detection device
JP2009186393A (en) State quantity measuring device for rolling bearing unit
JP2005188554A (en) Bearing with rotary sensor
JP2023059707A (en) Rolling bearing with rotary sensor

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20051202

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20060325

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20071128

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20081224

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20090217

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20090407

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20090420

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 4304983

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120515

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130515

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130515

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140515

Year of fee payment: 5

LAPS Cancellation because of no payment of annual fees