JP2008190688A - Bearing with sensor - Google Patents

Bearing with sensor Download PDF

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JP2008190688A
JP2008190688A JP2007028110A JP2007028110A JP2008190688A JP 2008190688 A JP2008190688 A JP 2008190688A JP 2007028110 A JP2007028110 A JP 2007028110A JP 2007028110 A JP2007028110 A JP 2007028110A JP 2008190688 A JP2008190688 A JP 2008190688A
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sensor
ring
stationary
sensor housing
bearing
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JP5018113B2 (en
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Tomoyuki Yanagisawa
知之 柳沢
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NSK Ltd
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NSK Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7859—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a further sealing element
    • F16C33/7863—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a further sealing element mounted to the inner race, e.g. a flinger to use centrifugal effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing with a sensor, having a sensor housing into which a sensor can be accurately positioned at a predetermined place and firmly fixed. <P>SOLUTION: The bearing 2 with the sensor comprises a rotary ring (an inner ring) 4 and a stationary ring (an outer ring) 6 arranged opposing each other in a relatively rotatable manner, and a plurality of rolling elements 8 incorporated between the rotary ring and the stationary ring, wherein the sensor housing 26 is fixed to the stationary ring for storing the sensor 12 which detects the rotated condition of the rotary ring. The sensor housing with one end 26a being fitted into a fixing portion 6a of the stationary ring is positioned in no contact with the rotary ring. One end of the sensor housing is fixed to the fixing portion with predetermined adhesive T filled in the fixing portion of the stationary ring. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、各種駆動系の回転状態(例えば、回転数、回転速度など)を測定するためのセンサ付き軸受に関する。   The present invention relates to a sensor-equipped bearing for measuring the rotational state (for example, rotational speed, rotational speed, etc.) of various drive systems.

従来、例えば産業用機械をはじめ各種の駆動系には、当該駆動系の回転状態を測定するためのセンサ付き軸受が用いられている。その一例として図３に示された軸受２は、相対回転可能に対向配置された内輪(回転輪)４及び外輪(静止輪)６と、内外輪4,6間に転動自在に組み込まれた複数の転動体８と、各転動体８を回転自在に保持する保持器１０とを備えており、外輪６に搭載されたセンサ１２によって内輪４の回転状態を測定できるようになっている(特許文献１参照)。   Conventionally, bearings with sensors for measuring the rotational state of the drive system have been used in various drive systems including industrial machines, for example. As an example, the bearing 2 shown in FIG. 3 is incorporated between an inner ring (rotating ring) 4 and an outer ring (stationary ring) 6 facing each other so as to be relatively rotatable, and between the inner and outer rings 4 and 6. A plurality of rolling elements 8 and a cage 10 that rotatably holds each rolling element 8 are provided, and the rotational state of the inner ring 4 can be measured by a sensor 12 mounted on the outer ring 6 (patent) Reference 1).

センサ１２は、内輪４に固定された環状の磁気エンコーダ１４に記録された符号化情報(磁気情報)を検出するためのセンサ素子１６と、センサ素子１６に接続された出力ケーブル(図示しない)などの複数のセンサ構成品を備えて構成されている。この構成において、各センサ構成品は、センサハウジング１８に支持されていると共に、当該センサハウジング１８は、ホルダ用芯金２０に嵌装されており、ホルダ用芯金２０は、外輪(静止輪)６に固定されている。   The sensor 12 includes a sensor element 16 for detecting encoded information (magnetic information) recorded in an annular magnetic encoder 14 fixed to the inner ring 4, an output cable (not shown) connected to the sensor element 16, and the like. A plurality of sensor components are provided. In this configuration, each sensor component is supported by the sensor housing 18, and the sensor housing 18 is fitted to the holder core 20, and the holder core 20 is an outer ring (stationary ring). 6 is fixed.

なお、図面上において、転動体８として玉を例示しているが、コロが適用される場合もある。また、センサ１２が配置された側とは反対側の軸受には、その内外輪4,6間に密封板２２が設けられているが、密封板２２としては、例えばシール、接触又は非接触シールドを適用することが可能である。図面では、密封板２２として接触シールドが例示されている。   In the drawing, a ball is illustrated as the rolling element 8, but a roller may be applied. Further, the bearing on the side opposite to the side where the sensor 12 is disposed is provided with a sealing plate 22 between the inner and outer rings 4 and 6. As the sealing plate 22, for example, a seal, contact or non-contact shield is provided. It is possible to apply. In the drawing, a contact shield is illustrated as the sealing plate 22.

ところで、上述したようなセンサ１２において、センサハウジング１８とホルダ用芯金２０とは別部材で構成されている。このため、ホルダ用芯金２０を外輪(静止輪)６に堅牢に固定しても、例えば軸受２の使用状態や使用環境において当該軸受２に大きな外力が働く場合があり、その外力の大きさの程度によっては、ホルダ用芯金２０に対してセンサハウジング１８が位置ずれしたり、或いは、ホルダ用芯金２０からセンサハウジング１８が脱落したりする虞がある。   By the way, in the sensor 12 as described above, the sensor housing 18 and the core metal 20 for holder are constituted by different members. For this reason, even if the holder core 20 is firmly fixed to the outer ring (stationary ring) 6, for example, a large external force may be applied to the bearing 2 in the usage state or usage environment of the bearing 2. Depending on the degree, the sensor housing 18 may be displaced with respect to the holder core 20 or the sensor housing 18 may fall off the holder core 20.

そして、センサハウジング１８の位置ずれや脱落が生じた場合には、これに応じて当該ハウジング１８に支持されたセンサ１２(即ち、各センサ構成品)も同様に位置ずれや脱落してしまうことになる。この場合、各センサ構成品の位置ずれや脱落の程度によっては、当該センサ構成品自体が損傷してしまう場合もある。特に、センサ素子１６は、高い検出精度が要求されるため、その損傷の程度によっては、磁気エンコーダ１４に記録された磁気情報を高精度に検出することが困難になってしまう虞がある。
特開２００５−７６７４７号公報 When the sensor housing 18 is displaced or dropped, the sensor 12 (that is, each sensor component) supported by the housing 18 is similarly displaced or dropped accordingly. Become. In this case, depending on the degree of displacement or dropout of each sensor component, the sensor component itself may be damaged. In particular, since the sensor element 16 is required to have high detection accuracy, depending on the degree of damage, it may be difficult to detect magnetic information recorded in the magnetic encoder 14 with high accuracy.
JP 2005-76747 A

本発明は、このような問題を解決するためになされており、その目的は、センサを所定位置に確実に位置決めして堅牢に固定することが可能なセンサハウジングを有するセンサ付き軸受を提供することにある。   The present invention has been made to solve such problems, and an object of the present invention is to provide a sensor-equipped bearing having a sensor housing capable of securely positioning and firmly fixing the sensor in a predetermined position. It is in.

このような目的を達成するために、本発明は、相対回転可能に対向配置された回転輪及び静止輪と、回転輪と静止輪との間に転動自在に組み込まれた複数の転動体とを備え、回転輪の回転状態を検出するセンサを収容可能なセンサハウジングが静止輪に固定されたセンサ付き軸受であって、センサハウジングには、その一端を静止輪に形成された固定部に嵌め込んだ状態で、回転輪に対して非接触に位置決めされており、当該センサハウジングの一端は、静止輪の固定部に充填された所定の接着剤によって、当該固定部に固定されている。   In order to achieve such an object, the present invention includes a rotating wheel and a stationary wheel that are opposed to each other so as to be relatively rotatable, and a plurality of rolling elements that are rotatably incorporated between the rotating wheel and the stationary wheel. A sensor housing in which a sensor housing capable of accommodating a sensor for detecting the rotation state of the rotating wheel is fixed to the stationary wheel, and one end of the sensor housing is fitted into a fixing portion formed on the stationary wheel. The sensor housing is positioned in a non-contact manner with respect to the rotating wheel, and one end of the sensor housing is fixed to the fixed portion by a predetermined adhesive filled in the fixed portion of the stationary wheel.

このような発明において、静止輪の固定部には、ここに充填した接着剤が入り込んで硬化することで、当該接着剤の脱落を防止するための周溝が形成されている。また、固定部の周溝は、静止輪に沿って周方向に連続して或いは断続して形成されている。更に、固定部の周溝には、当該固定部からのセンサハウジングの脱落防止用の止め輪が嵌合されている。なお、センサハウジングは、樹脂材料で形成されている。   In such an invention, a circumferential groove for preventing the adhesive from falling off is formed in the stationary ring fixing portion by allowing the adhesive filled therein to enter and cure. Further, the circumferential groove of the fixed portion is formed continuously or intermittently in the circumferential direction along the stationary wheel. Further, a retaining ring for preventing the sensor housing from falling off from the fixed portion is fitted in the circumferential groove of the fixed portion. The sensor housing is made of a resin material.

本発明によれば、センサを所定位置に確実に位置決めして堅牢に固定することが可能なセンサハウジングを有するセンサ付き軸受を実現することができる。   ADVANTAGE OF THE INVENTION According to this invention, the sensor-equipped bearing which has a sensor housing which can position a sensor reliably in a predetermined position and can be fixed firmly is realizable.

以下、本発明の一実施の形態に係るセンサ付き軸受について、添付図面を参照して説明する。本実施の形態の説明に際し、上述したセンサ付き軸受(図３)と同一の構成には、添付図面において同一の参照符号を付すことで、その説明を省略する。なお、本実施の形態の軸受には、磁気エンコーダ１４(図３)に代えて、金属製トーンリング２４(図１)が適用されている。トーンリング２４は、これに形成された複数の凹凸(図示しない)の動きをセンサ１２で磁気変化の大きさとして検出することで、回転輪(内輪)４の回転状態を測定できるようになっている。   Hereinafter, a bearing with a sensor according to an embodiment of the present invention will be described with reference to the accompanying drawings. In the description of the present embodiment, the same components as those of the sensor-equipped bearing (FIG. 3) described above are denoted by the same reference numerals in the accompanying drawings, and the description thereof is omitted. Note that a metal tone ring 24 (FIG. 1) is applied to the bearing of the present embodiment instead of the magnetic encoder 14 (FIG. 3). The tone ring 24 can measure the rotational state of the rotating wheel (inner ring) 4 by detecting the movement of a plurality of irregularities (not shown) formed on the tone ring 24 as the magnitude of the magnetic change by the sensor 12. Yes.

図１(ａ),(ｂ)には、本実施の形態のセンサ付き軸受２の構成が示されており、回転輪(内輪)４の回転状態を検出するセンサ１２を収容可能なセンサハウジング２６が静止輪(外輪)６に固定されている。この場合、センサハウジング２６には、その一端２６ａを静止輪６に形成された固定部６ａに嵌め込んだ状態で、回転輪４に対して非接触に位置決めされており、当該センサハウジング２６の一端２６ａは、静止輪６の固定部６ａに充填された所定の接着剤Ｔによって、当該固定部６ａに固定されている。   1A and 1B show the configuration of the sensor-equipped bearing 2 of the present embodiment, and a sensor housing 26 that can accommodate a sensor 12 that detects the rotational state of the rotating wheel (inner ring) 4. Is fixed to a stationary ring (outer ring) 6. In this case, the sensor housing 26 is positioned in a non-contact manner with respect to the rotating wheel 4 with one end 26 a of the sensor housing 26 fitted in a fixed portion 6 a formed on the stationary wheel 6. 26 a is fixed to the fixed portion 6 a by a predetermined adhesive T filled in the fixed portion 6 a of the stationary wheel 6.

センサハウジング２６には、例えばトーンリング２４の磁気変化を検出するためのセンサ素子(例えばホールＩＣや磁気抵抗素子など)１６や、センサ素子１６に接続されるケーブル２８などの複数のセンサ構成品が保持されている。ここで、センサ素子１６とケーブル２８との接続は、センサハウジング２６内に各センサ構成品(センサ素子１６、ケーブル２８)を収容した状態で行っても良いし、先にセンサ素子１６とケーブル２８とを接続した後にセンサハウジング２６に収容しても良い。この場合、接続方法としては、センサ素子１６の各リード１６ｔと各ケーブル２８の接続端２８ｔとを例えばレーザ溶接、はんだ付け、圧着端子などにより相互に接続させれば良い。   The sensor housing 26 includes a plurality of sensor components such as a sensor element (for example, a Hall IC or a magnetoresistive element) 16 for detecting a magnetic change of the tone ring 24 and a cable 28 connected to the sensor element 16. Is retained. Here, the sensor element 16 and the cable 28 may be connected in a state where each sensor component (sensor element 16 and cable 28) is accommodated in the sensor housing 26, or the sensor element 16 and the cable 28 are first connected. May be accommodated in the sensor housing 26. In this case, as a connection method, the leads 16t of the sensor element 16 and the connection ends 28t of the cables 28 may be connected to each other by, for example, laser welding, soldering, or crimping terminals.

また、センサ素子１６には、所定の磁石(永久磁石)３０が接着され一体化されている。磁石３０の接着方法や接着剤について特に制限されることは無いが、接着剤としては、エポキシ系接着剤や、取り扱いが比較的容易な一液型のシリコン系接着剤を適用することが好ましい。これに対して、磁石３０の接着方向については、センサ素子１６の感受面１６ｓに対して垂直に磁束が通る方向に設定する。図面では一例として、センサ素子１６とトーンリング２４とは、軸受２のアキシアル方向に対向配置されている。この場合、トーンリング２４は、回転輪(内輪)４に固定された状態でラジアル方向に延出し、その延出端が静止輪(外輪)６に対して非接触状態に位置決めされており、センサ素子１６は、その感受面１６ｓをトーンリング２４に対向させるように配置されている。   A predetermined magnet (permanent magnet) 30 is bonded and integrated with the sensor element 16. Although there are no particular limitations on the method of bonding the magnet 30 and the adhesive, it is preferable to apply an epoxy adhesive or a one-pack silicone adhesive that is relatively easy to handle. On the other hand, the bonding direction of the magnet 30 is set to a direction in which the magnetic flux passes perpendicularly to the sensing surface 16 s of the sensor element 16. In the drawing, as an example, the sensor element 16 and the tone ring 24 are opposed to each other in the axial direction of the bearing 2. In this case, the tone ring 24 extends in the radial direction while being fixed to the rotating wheel (inner ring) 4, and its extending end is positioned in a non-contact state with respect to the stationary wheel (outer ring) 6. The element 16 is arranged so that the sensitive surface 16 s faces the tone ring 24.

また、センサハウジング２６の材質については、例えば６６ナイロン(登録商標)や、ＰＰＳ、ＰＢＴなどのエンジニアリングプラスチック及びその他の樹脂材料を適用することが可能であり、これを射出成型することにより例えば図１(ａ)に示すような形状に構成することができる。なお、これ以外の樹脂材料であっても良い。   As the material of the sensor housing 26, for example, 66 nylon (registered trademark), engineering plastics such as PPS and PBT, and other resin materials can be applied. By injection molding, for example, FIG. It can comprise in the shape as shown to (a). Other resin materials may be used.

ここで、上述したようなセンサハウジング２６の一端２６ａを静止輪６の固定部６ａに固定する方法について説明する。
まず、センサハウジング２６の一端２６ａを静止輪６に形成された固定部６ａに嵌め込んで、回転輪４に対して非接触に位置決めする。なお、固定部６ａは、静止輪６の内周外縁をセンサハウジング２６の一端２６ａの外形輪郭に沿って掘り込み形成した空間領域を指す。この場合、当該固定部６ａに一端２６ａを嵌め込む(或いは、圧入)ことで、当該センサハウジング２６を回転輪４に対して非接触に位置決めすることができる。 Here, a method for fixing the one end 26a of the sensor housing 26 to the fixing portion 6a of the stationary wheel 6 will be described.
First, one end 26 a of the sensor housing 26 is fitted into a fixed portion 6 a formed on the stationary wheel 6 and positioned in a non-contact manner with respect to the rotating wheel 4. The fixed portion 6 a indicates a space region formed by digging the inner and outer edges of the stationary wheel 6 along the outer contour of the one end 26 a of the sensor housing 26. In this case, the sensor housing 26 can be positioned in a non-contact manner with respect to the rotating wheel 4 by fitting one end 26a into the fixing portion 6a (or press-fitting).

続いて、センサハウジング２６の一端２６ａが嵌め込まれた静止輪６の固定部６ａに所定の接着剤Ｔを充填する。この場合、接着剤Ｔは、例えばエポキシ系接着剤や、取り扱いが比較的容易な一液型のシリコン系接着剤など各種の接着剤を適用することができるが、これ以外の接着剤でも良い。また、磁石３０とセンサ素子１６との接着に使用する接着剤と共用できる場合は、接着剤を複数準備する必要がなくなるため、生産性の向上と低コスト化が期待できる。なお、固定部６ａに充填する接着剤Ｔの充填量は、当該固定部６ａにセンサハウジング２６の一端２６ａを嵌め込んだ状態で残留している空間領域に応じて任意に設定されるため、ここでは特に限定しないが、図面に例示したように、充填した接着剤Ｔが静止輪６の側面を越えない程度に調整することが好ましい。   Subsequently, a predetermined adhesive T is filled in the fixing portion 6a of the stationary ring 6 into which the one end 26a of the sensor housing 26 is fitted. In this case, as the adhesive T, for example, various adhesives such as an epoxy adhesive and a one-pack type silicon adhesive that is relatively easy to handle can be applied, but other adhesives may be used. Moreover, when it can share with the adhesive agent used for adhesion | attachment with the magnet 30 and the sensor element 16, since it becomes unnecessary to prepare several adhesive agents, improvement of productivity and cost reduction can be anticipated. In addition, since the filling amount of the adhesive T filling the fixing portion 6a is arbitrarily set according to the space area remaining in a state where the one end 26a of the sensor housing 26 is fitted in the fixing portion 6a, Then, although not particularly limited, as illustrated in the drawing, it is preferable to adjust the filled adhesive T so that it does not exceed the side surface of the stationary ring 6.

そして、固定部６ａに充填した接着剤Ｔを硬化させることで、センサハウジング２６を静止輪６に堅牢に固定することができる。この場合、静止輪６の固定部６ａに周溝６ｇを形成し、ここに充填した接着剤Ｔが入り込んで硬化することで、当該接着剤Ｔの脱落を防止するように構成しても良い。これにより、硬化した接着剤Ｔが一種の止め輪のような役割を果たすことになるため、センサハウジング２６と静止輪６との固定状態を飛躍的に強化することができる。   The sensor housing 26 can be firmly fixed to the stationary wheel 6 by curing the adhesive T filled in the fixing portion 6a. In this case, a circumferential groove 6g may be formed in the fixed portion 6a of the stationary ring 6, and the adhesive T filled therein may enter and be cured to prevent the adhesive T from falling off. Thereby, since the hardened adhesive T plays a role as a kind of retaining ring, the fixing state of the sensor housing 26 and the stationary ring 6 can be remarkably strengthened.

この場合、固定部６ａの周溝６ｇは、静止輪６に沿って周方向に連続して形成しても良いし、或いは所定間隔で断続して形成しても良い。この場合、周溝６ｇの形状や大きさ及び深さは、例えば静止輪６の形状や大きさ、或いは固定部６ａの形状や大きさに応じて任意に設定されるため、ここでは特に限定しない。なお、図面には一例として、矩形状の周溝６ｇが示されているが、例えば円形、楕円形、三角形など各種の形状を適宜選択することが可能である。   In this case, the circumferential groove 6g of the fixed portion 6a may be formed continuously in the circumferential direction along the stationary wheel 6, or may be formed intermittently at a predetermined interval. In this case, the shape, size, and depth of the circumferential groove 6g are arbitrarily set depending on, for example, the shape and size of the stationary ring 6 or the shape and size of the fixed portion 6a, and are not particularly limited here. . In the drawing, a rectangular circumferential groove 6g is shown as an example, but various shapes such as a circle, an ellipse, and a triangle can be appropriately selected.

以上、本実施の形態によれば、センサハウジング２６の一端２６ａを静止輪６の固定部６ａに接着剤Ｔによって固定したことで、例えば軸受２の使用状態や使用環境において当該軸受２に大きな外力が働いた場合でも当該センサハウジング２６が静止輪６に対して位置ずれしたり、或いは、脱落したりすることは無い。これにより、センサハウジング２６に収容したセンサ１２を所定位置に確実に位置決めして堅牢に固定することができる。この場合、センサ素子１６とトーンリング２４との位置関係が一定に維持され、その結果、トーンリング２４の磁気変化を高精度に検出することが可能となり、回転輪(内輪)４の回転状態を正確に測定することができる。   As described above, according to the present embodiment, the one end 26a of the sensor housing 26 is fixed to the fixing portion 6a of the stationary ring 6 with the adhesive T, so that a large external force is applied to the bearing 2 in the usage state or usage environment of the bearing 2, for example. Even when the sensor housing 26 is operated, the sensor housing 26 is not displaced from the stationary wheel 6 or dropped off. Thereby, the sensor 12 accommodated in the sensor housing 26 can be reliably positioned and fixed firmly at a predetermined position. In this case, the positional relationship between the sensor element 16 and the tone ring 24 is maintained constant. As a result, the magnetic change of the tone ring 24 can be detected with high accuracy, and the rotation state of the rotating wheel (inner ring) 4 can be determined. It can be measured accurately.

また、樹脂製のセンサハウジング２６の一端２６ａを静止輪６の固定部６ａに圧入固定した場合、当該センサハウジング２６がクリープすることで、その一端２６ａの固定状態が緩んでしまう場合がある。この場合でも、固定部６ａに接着剤Ｔを充填したり、更に固定部６ａに周溝６ｇを形成し、ここに接着剤Ｔを入り込ませて固定するなどにより、センサハウジング２６と静止輪６とを堅牢に固定することができる。   Moreover, when the one end 26a of the resin-made sensor housing 26 is press-fitted and fixed to the fixing portion 6a of the stationary wheel 6, the sensor housing 26 may creep, and the fixed state of the one end 26a may be loosened. Even in this case, the sensor housing 26 and the stationary wheel 6 can be fixed by filling the fixing portion 6a with the adhesive T, further forming the circumferential groove 6g in the fixing portion 6a, and fixing the adhesive T by inserting the adhesive T therein. Can be fixed firmly.

なお、上述した実施の形態の変形例として、例えば図２(ａ),(ｂ)に示すように、固定部６ａの周溝６ｇに、当該固定部６ａからのセンサハウジング２６の脱落を防止するための止め輪３２を嵌合するようにしても良い。この場合、止め輪３２の嵌合方法は、センサハウジング２６の一端２６ａを静止輪６に形成された固定部６ａに嵌め込んだ後に、固定部６ａの周溝６ｇに止め輪３２を嵌合し、その状態で接着剤Ｔを充填すれば良い。   As a modification of the above-described embodiment, for example, as shown in FIGS. 2A and 2B, the sensor housing 26 is prevented from falling off from the fixing portion 6a in the circumferential groove 6g of the fixing portion 6a. A retaining ring 32 may be fitted. In this case, the retaining ring 32 is fitted by fitting the retaining ring 32 into the circumferential groove 6g of the stationary part 6a after fitting the one end 26a of the sensor housing 26 into the stationary part 6a formed on the stationary ring 6. In this state, the adhesive T may be filled.

このように止め輪３２全体を接着剤Ｔで硬化させることで、センサハウジング２６と静止輪６とを更に堅牢に固定することができる。これにより、静止輪６からの、センサハウジング２６の脱落を確実に防止することが可能となり、その結果、より信頼性の高いセンサ付き軸受２を実現することができる。なお、止め輪３２の形状や大きさは、例えば周溝６ｇの形状や大きさに応じて任意に設定されるため、ここでは特に限定しない。また、止め輪３２の材質は、例えばバネ鋼やステンレス鋼など軸受２の使用目的や使用環境に応じて任意に設定することが可能である。   In this way, by hardening the entire retaining ring 32 with the adhesive T, the sensor housing 26 and the stationary ring 6 can be more firmly fixed. Thereby, it is possible to reliably prevent the sensor housing 26 from falling off the stationary wheel 6, and as a result, it is possible to realize the sensor-equipped bearing 2 with higher reliability. In addition, since the shape and magnitude | size of the retaining ring 32 are arbitrarily set, for example according to the shape and magnitude | size of the circumferential groove 6g, it does not specifically limit here. The material of the retaining ring 32 can be arbitrarily set according to the purpose of use and the usage environment of the bearing 2 such as spring steel or stainless steel.

また、上述した実施の形態及び変形例では、センサ素子１６とトーンリング２４とを軸受２のアキシアル方向に対向配置した構成を想定したが、これに代えて、センサ素子１６とトーンリング２４とを軸受２のラジアル方向に対向配置した構成にしても上記同様の効果を得ることができることは言うまでも無い。   Further, in the above-described embodiment and modification, it is assumed that the sensor element 16 and the tone ring 24 are arranged opposite to each other in the axial direction of the bearing 2, but instead the sensor element 16 and the tone ring 24 are provided. It goes without saying that the same effect as described above can be obtained even when the bearing 2 is arranged opposite to the radial direction.

(ａ)は、本発明の一実施の形態に係るセンサ付き軸受の構成を示す断面図、(ｂ)は、同図(ａ)のセンサ付き軸受の一部を拡大して示す断面図。(a) is sectional drawing which shows the structure of the bearing with a sensor which concerns on one embodiment of this invention, (b) is sectional drawing which expands and shows a part of bearing with a sensor of the figure (a). (ａ)は、本発明の変形例に係るセンサ付き軸受の構成を示す斜視図、(ｂ)は、同図(ａ)のセンサ付き軸受の一部を拡大して示す断面図。(a) is a perspective view which shows the structure of the bearing with a sensor which concerns on the modification of this invention, (b) is sectional drawing which expands and shows a part of bearing with a sensor of the figure (a). 従来のセンサ付き軸受の構成を示す断面図。Sectional drawing which shows the structure of the conventional bearing with a sensor.

符号の説明Explanation of symbols

２ センサ付き軸受
４ 回転輪(内輪)
６ 静止輪(外輪)
６ａ 固定部
８ 転動体
１２ センサ
２６ センサハウジング
２６ａ センサハウジングの一端
Ｔ 接着剤 2 Bearing with sensor 4 Rotating wheel (inner ring)
6 Stationary wheel (outer ring)
6a Fixed part 8 Rolling body 12 Sensor 26 Sensor housing 26a One end T of sensor housing Adhesive

Claims (5)

相対回転可能に対向配置された回転輪及び静止輪と、回転輪と静止輪との間に転動自在に組み込まれた複数の転動体とを備え、回転輪の回転状態を検出するセンサを収容可能なセンサハウジングが静止輪に固定されたセンサ付き軸受であって、
センサハウジングには、その一端を静止輪に形成された固定部に嵌め込んだ状態で、回転輪に対して非接触に位置決めされており、当該センサハウジングの一端は、静止輪の固定部に充填された所定の接着剤によって、当該固定部に固定されていることを特徴とするセンサ付き軸受。 A rotating wheel and a stationary wheel that are opposed to each other so as to be relatively rotatable, and a plurality of rolling elements that are rotatably incorporated between the rotating wheel and the stationary wheel, and that contains a sensor that detects the rotational state of the rotating wheel. A possible sensor housing is a bearing with a sensor fixed to a stationary ring,
The sensor housing is positioned in a non-contact manner with respect to the rotating wheel with one end of the sensor housing fitted into a stationary part formed on the stationary ring, and one end of the sensor housing fills the stationary part of the stationary wheel. A sensor-equipped bearing, wherein the bearing is fixed to the fixed portion with a predetermined adhesive. 静止輪の固定部には、ここに充填した接着剤が入り込んで硬化することで、当該接着剤の脱落を防止するための周溝が形成されていることを特徴とする請求項１に記載のセンサ付き軸受。   The peripheral portion for preventing the adhesive from falling off is formed in the fixed portion of the stationary ring by the adhesive filled therein entering and curing. Bearing with sensor. 固定部の周溝は、静止輪に沿って周方向に連続して或いは断続して形成されていることを特徴とする請求項２に記載のセンサ付き軸受。   The sensor-equipped bearing according to claim 2, wherein the circumferential groove of the fixed portion is formed continuously or intermittently in the circumferential direction along the stationary wheel. 固定部の周溝には、当該固定部からのセンサハウジングの脱落防止用の止め輪が嵌合されていることを特徴とする請求項２又は３に記載のセンサ付き軸受。   The bearing with a sensor according to claim 2 or 3, wherein a retaining ring for preventing the sensor housing from falling off from the fixed portion is fitted in the circumferential groove of the fixed portion. センサハウジングは、樹脂材料で形成されていることを特徴とする請求項１に記載のセンサ付き軸受。   The sensor-equipped bearing according to claim 1, wherein the sensor housing is made of a resin material.
JP2007028110A 2007-02-07 2007-02-07 Bearing with sensor Expired - Fee Related JP5018113B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2492529A4 (en) * 2009-10-22 2016-04-20 Ntn Toyo Bearing Co Ltd Bearing with sensor
CN110553841A (en) * 2019-08-08 2019-12-10 浙江西密克轴承股份有限公司 Sound ring detection machine

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Publication number Priority date Publication date Assignee Title
JP2002295465A (en) * 2001-03-28 2002-10-09 Ntn Corp Rolling bearing with rotation sensor
JP2002339996A (en) * 2001-05-22 2002-11-27 Nsk Ltd Bearing device
JP2002543357A (en) * 1999-04-28 2002-12-17 エスケイエフ フランス Rolling bearing device
JP2003344102A (en) * 2002-05-31 2003-12-03 Koyo Seiko Co Ltd Pulser and sensing apparatus
JP2005256880A (en) * 2004-03-10 2005-09-22 Ntn Corp Bearing with sensor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002543357A (en) * 1999-04-28 2002-12-17 エスケイエフ フランス Rolling bearing device
JP2002295465A (en) * 2001-03-28 2002-10-09 Ntn Corp Rolling bearing with rotation sensor
JP2002339996A (en) * 2001-05-22 2002-11-27 Nsk Ltd Bearing device
JP2003344102A (en) * 2002-05-31 2003-12-03 Koyo Seiko Co Ltd Pulser and sensing apparatus
JP2005256880A (en) * 2004-03-10 2005-09-22 Ntn Corp Bearing with sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2492529A4 (en) * 2009-10-22 2016-04-20 Ntn Toyo Bearing Co Ltd Bearing with sensor
CN110553841A (en) * 2019-08-08 2019-12-10 浙江西密克轴承股份有限公司 Sound ring detection machine

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