JP2008224441A - Bearing unit with rotational speed detector - Google Patents

Bearing unit with rotational speed detector Download PDF

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JP2008224441A
JP2008224441A JP2007063666A JP2007063666A JP2008224441A JP 2008224441 A JP2008224441 A JP 2008224441A JP 2007063666 A JP2007063666 A JP 2007063666A JP 2007063666 A JP2007063666 A JP 2007063666A JP 2008224441 A JP2008224441 A JP 2008224441A
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sensor
ring member
inner ring
pulse detection
detection sensor
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JP5103960B2 (en
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Yoshiaki Masuda
善紀 増田
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JTEKT Corp
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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
    • 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
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • 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
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
    • F16C33/7883—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring mounted to the inner race and of generally L-shape, the two sealing rings defining a sealing with box-shaped cross-section
    • 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

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  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing unit with a rotational speed detector that can prevent drop of a pulse detection sensor from a sensor holder even if it is used for a long time, does not require formation of a surface treatment layer on the sensor holder, and does not essentially cause a flaw, peeling or the like of the surface treatment layer by an impact or the like. <P>SOLUTION: The sensor holder 6 is made of stainless steel plate material of high corrosion resistance of the material itself. Therefore, the drop of the pulse detection sensor 12 from the sensor holder 6 can be prevented even when it is used for the long time, the formation of the surface treatment layer on the sensor holder 6 is not required, and a flaw, peeling or the like of the surface treatment layer by the impact or the like does not occur essentially. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、回転速度検出装置付き軸受装置に関する。   The present invention relates to a bearing device with a rotational speed detection device.

特開平６−３０８１４５号公報JP-A-6-308145 特開２００６−２０８０３８号公報JP 2006-208038 A

回転センサは光学式のロータリーエンコーダが広く使用されているが、自動車の足回り系統の回転検知には、汚れ付着等による誤検出を防止するために磁気式の回転センサが使用されることが多い。磁気式の回転センサには種々の方式があるが、検知対象物と共に回転する磁性被検知体に磁気ギャップを介して、磁気ヘッド、磁気抵抗効果素子あるいはホール素子といった磁界検出素子を配置し、磁性被検知体の回転に基づく磁気ギャップ内の磁界変動を測定し、その検出波形を用いて回転角度を算出する方式が、センサ構造が比較的簡便であり精度も高いことから広く使用されている。   Optical rotary encoders are widely used as rotation sensors, but magnetic rotation sensors are often used for detecting rotation of automobile undercarriage systems in order to prevent erroneous detection due to dirt adhesion and the like. . There are various types of magnetic rotation sensors. Magnetic field detection elements such as magnetic heads, magnetoresistive effect elements, or Hall elements are arranged through magnetic gaps on a magnetic object that rotates together with the object to be detected. A method of measuring the magnetic field fluctuation in the magnetic gap based on the rotation of the object to be detected and calculating the rotation angle using the detected waveform is widely used because the sensor structure is relatively simple and accurate.

近年、上記のような磁気式回転センサをアンチロックブレーキシステム（ＡＢＳ）等の制御に用いるため、車軸を支持する転がり軸受として、該多極着磁した永久磁石リングからなるパルサーリングとパルス検知センサとを取り付けた転がり軸受が採用されている（例えば、特許文献１，２）。この構成においてパルス検知センサは、外輪部材の端部外周面に嵌合されるセンサホルダにクリップオン式に挿し込み固定される。センサホルダは、車体インナー側にて外輪部材の端部外周面に嵌合するリング状の取付部と、パルス検知センサの装着方向先端部を挿し入れる枠形ポケット状のセンサ収容部とからなる。センサ収容部にはクリップ形態のセンサ付勢保持部が設けられ、センサ付勢保持部の弾性力によりパルス検知センサのヘッドをクリップオン式に装着できるようにしている。   In recent years, since the magnetic rotation sensor as described above is used for control of an anti-lock brake system (ABS) or the like, a pulser ring and a pulse detection sensor comprising a multi-pole magnetized permanent magnet ring as a rolling bearing for supporting an axle. Are used (for example, Patent Documents 1 and 2). In this configuration, the pulse detection sensor is inserted and fixed in a clip-on manner into a sensor holder fitted to the outer peripheral surface of the end portion of the outer ring member. The sensor holder includes a ring-shaped attachment portion that fits on the outer peripheral surface of the end portion of the outer ring member on the inner side of the vehicle body, and a frame-shaped pocket-shaped sensor housing portion into which the front end portion in the mounting direction of the pulse detection sensor is inserted. The sensor housing portion is provided with a clip-type sensor urging holding portion, and the head of the pulse detection sensor can be mounted in a clip-on manner by the elastic force of the sensor urging holding portion.

ところで、クリップオン式のセンサホルダは鋼鉄製であり、耐食性の向上のために、薄い電気亜鉛メッキが施されているが、長時間使用すると、特に、クリップ部が、腐食により破損し、パルス検知センサが車輪軸受装置から脱落する可能性がある。特許文献１にはこの問題を解消するために、鋼鉄製のセンサホルダに電着塗装を施す提案がなされているが、電着塗装工程が余分に必要となる欠点がある。特に、電着塗装は、被塗装部材を引っ掛け式の電極に装着して塗装浴内に保持する必要があり、バレルメッキ等のバッチ処理を行ないにくい難点もある。また、電着塗装層に、外部からの衝撃当により傷や剥離が発生すると内部の鋼材の錆が進行し、センサ装着部のばね保持力が経時劣化しやすい問題がある。   By the way, the clip-on type sensor holder is made of steel and is thinly electrogalvanized to improve corrosion resistance. However, when used for a long time, the clip part is damaged due to corrosion, and pulse detection is performed. The sensor may fall off the wheel bearing device. In order to solve this problem, Patent Document 1 proposes to apply electrodeposition coating to a steel sensor holder. However, there is a drawback that an electrodeposition coating process is required. In particular, electrodeposition coating requires that a member to be coated be mounted on a hook-type electrode and held in a coating bath, and there is a difficulty in performing batch processing such as barrel plating. In addition, when the electrodeposition coating layer is scratched or peeled off due to impact from the outside, rusting of the internal steel material proceeds, and there is a problem that the spring holding force of the sensor mounting portion is likely to deteriorate over time.

本発明の課題は、長時間使用してもパルス検知センサのセンサホルダからの脱落を防止でき、かつセンサホルダへの表面処理層の形成が不要で、衝撃等による表面処理層の傷や剥離等が本質的に生じない回転速度検出装置付き軸受装置を提供することにある。   The problem of the present invention is that the pulse detection sensor can be prevented from falling off from the sensor holder even when used for a long time, and it is not necessary to form a surface treatment layer on the sensor holder, and the surface treatment layer is scratched or peeled off due to impact or the like. It is an object of the present invention to provide a bearing device with a rotational speed detection device in which the above-mentioned is essentially not generated.

上記の課題を解決するための、本発明の回転速度検出装置付き軸受装置は、
アキシャル方向に配列する複数の軌道面が内周面に形成された外輪部材と、
軌道面の各々に対向する軌道面が外周面に形成された内輪部材と、
外輪部材と内輪部材との対向する軌道面間に介在する複列の転動体とを有し、
外輪部材と内輪部材のうち回転側部材となるもののアキシャル方向第一端側に同心的に取り付けられるパルサーリングと、
外輪部材と内輪部材のうち静止側部材となるもののアキシャル方向第一端側に、パルサーリングに対向する形で取り付けられるパルス検知センサと、
静止側部材への取付部と、パルス検知センサのセンシング面をパルサーリングへの対向方向に位置決めする静止側部材側の基準面に対し、パルス検知センサの対応する被当接面を当接させた状態でパルス検知センサを収容するセンサ収容部と、該センサ収容部に設けられ、パルス検知センサを被当接面とは反対側から静止側部材側の基準面に向けて押し付け付勢保持するセンサ付勢保持部とを、ステンレス鋼板材により一体形成したセンサホルダとを有したことを特徴とする。 In order to solve the above problems, the bearing device with a rotational speed detection device of the present invention is
An outer ring member in which a plurality of raceway surfaces arranged in the axial direction are formed on the inner peripheral surface;
An inner ring member formed on the outer circumferential surface with a raceway surface facing each of the raceway surfaces;
A double row rolling element interposed between the raceway surfaces facing the outer ring member and the inner ring member;
A pulsar ring that is concentrically attached to the first end side in the axial direction of the outer ring member and the inner ring member that becomes the rotation side member;
A pulse detection sensor attached to the first end side in the axial direction of the outer ring member and the inner ring member that is the stationary side member, in a form facing the pulsar ring,
The corresponding contacted surface of the pulse detection sensor is brought into contact with the reference surface on the stationary side member positioning the mounting surface to the stationary side member and the sensing surface of the pulse detection sensor in the direction facing the pulsar ring. Sensor housing portion for housing the pulse detection sensor in a state, and a sensor provided in the sensor housing portion for pressing and holding the pulse detection sensor from the opposite side to the contacted surface toward the reference surface on the stationary member side The urging holding part has a sensor holder integrally formed of a stainless steel plate material.

上記構成によると、センサホルダを素材自体の耐食性が良好なステンレス鋼板材により形成したので、長時間使用してもパルス検知センサのセンサホルダからの脱落を防止でき、かつセンサホルダへの表面処理層の形成が不要なので、衝撃等による表面処理層の傷や剥離等が本質的に生じることがない。   According to the above configuration, since the sensor holder is formed of a stainless steel plate material having good corrosion resistance of the material itself, the pulse detection sensor can be prevented from falling off from the sensor holder even when used for a long time, and the surface treatment layer on the sensor holder can be prevented. Therefore, the surface treatment layer is not damaged or peeled off due to impact or the like.

センサホルダは、ステンレス鋼板材の打抜き及び曲げ加工により取付部とセンサ収容部とセンサ付勢保持部とが一体形成されたものとすることができる。センサ付勢保持部は、この曲げ加工時に蓄積される歪（加工硬化）により弾性限が向上し、良好なばね保持力特性を生ずることとなる。そして、その材質をステンレス鋼とすることで、錆の進行が劇的に抑制され、センサ付勢保持部のばね保持力特性を長期に渡って良好に保つことができる。   In the sensor holder, the mounting portion, the sensor accommodating portion, and the sensor biasing holding portion can be integrally formed by punching and bending a stainless steel plate material. The sensor urging holding portion is improved in elastic limit due to strain (work hardening) accumulated at the time of bending, and produces good spring holding force characteristics. And by making the material into stainless steel, the progress of rust is dramatically suppressed, and the spring holding force characteristic of the sensor biasing holding portion can be kept good over a long period of time.

ステンレス鋼板材はフェライト系ステンレス鋼又はオーステナイト系ステンレス鋼にて構成することができる。フェライト系ステンレス鋼又はオーステナイト系ステンレス鋼は加工性が良好であり、特に冷間曲げ加工によりセンサ付勢保持部に良好なばね保持力を付与できる。また、オーステナイト系ステンレス鋼は耐食性が特に良好である。一方、ステンレス鋼板材は、曲げ加工後に焼入れ処理されたマルテンサイト系ステンレス鋼にて構成することができる。マルテンサイト系ステンレス鋼は焼き鈍し状態にて加工性が良好であり、最終的な打抜／曲げ加工後に焼入れ処理することで鋼の硬さが大幅に増大するので、一層強力なばね保持力をセンサ付勢保持部に付与できる。なお、センサ保持に関与しない取付部については、むしろ取付時の締結力等により過剰な応力が付与されても割れ等が生じにくいように焼入れ処理せず、センサ付勢保持部のみ高周波焼入等により局所的に硬化させることも有効である。   The stainless steel plate material can be composed of ferritic stainless steel or austenitic stainless steel. Ferritic stainless steel or austenitic stainless steel has good workability, and in particular, a good spring holding force can be imparted to the sensor biasing holding portion by cold bending. Austenitic stainless steel has particularly good corrosion resistance. On the other hand, the stainless steel plate material can be composed of martensitic stainless steel that has been quenched after bending. Martensitic stainless steel has good workability in the annealed state, and the hardness of the steel is greatly increased by quenching after the final punching / bending process. It can be given to the urging holding part. For mounting parts that are not involved in sensor holding, rather than quenching so that cracks and the like are not easily generated even if excessive stress is applied due to the fastening force at the time of mounting, only the sensor biasing holding part is induction hardened, etc. It is also effective to harden locally.

本発明に採用可能なステンレス鋼は、日本工業規格Ｇ４３０４（１９８７）に記載された各種ステンレス鋼が採用できる。オーステナイト系ステンレス鋼としては、ＳＵＳ２０１、ＳＵＳ２０２、ＳＵＳ３０１、ＳＵＳ３０１Ｊ、ＳＵＳ３０２、ＳＵＳ３０２Ｂ、ＳＵＳ３０４、ＳＵＳ３０４Ｌ、ＳＵＳ３０４Ｎ１、ＳＵＳ３０４Ｎ２、ＳＵＳ３０４ＬＮ、ＳＵＳ３０５、ＳＵＳ３０９Ｓ、ＳＵＳ３１０Ｓ、ＳＵＳ３１６、ＳＵＳ３１６Ｌ、ＳＵＳ３１６Ｎ、ＳＵＳ３１６ＬＮ、ＳＵＳ３１６Ｊ１、ＳＵＳ３１６Ｊ１Ｌ、ＳＵＳ３１７、ＳＵＳ３１７Ｌ、ＳＵＳ３１７Ｊ１、ＳＵＳ３２１、ＳＵＳ３４７、ＳＵＳＸＭ１５Ｊ１等を例示できる。また、オーステナイト−フェライト系ステンレス鋼として、ＳＵＳ３２９Ｊ１、ＳＵＳ３２９Ｊ２Ｌ等を例示できる。フェライト系ステンレス鋼としては、ＳＵＳ４０５、ＳＵＳ４１０Ｌ、ＳＵＳ４２９、ＳＵＳ４３０、ＳＵＳ４３０ＬＸ、ＳＵＳ４３４、ＳＵＳ４３６Ｌ、ＳＵＳ４４４、ＳＵＳ４４７Ｊ１、ＳＵＳＸＭ２７等を例示できる。マルテンサイト系ステンレス鋼としては、ＳＵＳ４０３、ＳＵＳ４１０、ＳＵＳ４１０Ｓ、ＳＵＳ４２０Ｊ１、ＳＵＳ４２０Ｊ２、ＳＵＳ４２９Ｊ１、ＳＵＳ４４０Ａ等を例示できる。   As the stainless steel that can be used in the present invention, various stainless steels described in Japanese Industrial Standard G4304 (1987) can be used. As austenitic stainless steel, SUS201, SUS202, SUS301, SUS301J, SUS302, SUS302B, SUS304, SUS304L, SUS304N1, SUS304N2, SUS304LN, SUS305, SUS309S, SUS310S, SUS3L, SUS316L, SUS316L, SUS316L, SUS316L, SUS316L, SUS316L, SUS316L. SUS317J1, SUS321, SUS347, SUSXM15J1, and the like. Examples of the austenite-ferritic stainless steel include SUS329J1, SUS329J2L, and the like. Examples of ferritic stainless steel include SUS405, SUS410L, SUS429, SUS430, SUS430LX, SUS434, SUS436L, SUS444, SUS447J1, and SUSXM27. Examples of martensitic stainless steel include SUS403, SUS410, SUS410S, SUS420J1, SUS420J2, SUS429J1, and SUS440A.

例えば、静止側部材を外輪部材とし、回転側部材を内輪部材とする場合、以下のように構成することができる。すなわち、それら外輪部材と内輪部材とは、アキシャル方向第一端側に位置する転動体列よりも延出した延出部を有するものとする。該延出部同士が対向して形成する隙間のアキシャル方向開口の内側にて、内輪部材の外周面にＬ字型断面を有する内輪側スリンガを取り付け、これと対向する位置にて外輪部材の内周面に逆Ｌ字型断面を有する外輪側スリンガを取り付ける。それら内輪側スリンガと外輪側スリンガとの対向面には、隙間から転動体列側に侵入しようとする異物を遮断するための弾性シール部材が、外輪側スリンガの内面に固着される形で内輪側スリンガの内面上を回転摺動可能に取り付けられる。パルサーリングは、内輪側スリンガの、内輪部材の内周面から開口を遮蔽する形でラジアル方向に立ち上がるラジアル方向壁部の外面に固着される。センサホルダは、外輪部材の外周面のアキシャル方向第一端縁部に外嵌するリング状に取付部が形成され、センサ収容部が、リング状の取付部のアキシャル方向第一端縁からラジアル方向内側に延出するとともに、装着されるパルス検知センサのセンシング面を露出させる窓部が形成された第一部分と、該第一部分の先端から、パルス検知センサのラジアル方向先端面に沿ってアキシャル方向に曲げ返される第二部分と、該第二部分の先端からパルス検知センサのセンシング面の裏側にまわり込む形でラジアル方向外側に延出する第三部分とを有する曲げ加工部とされ、パルス検知センサは第一部分と第三部分が形成するラジアル方向外側の装着開口から、第二部分の弾性変形により、該第三部分の第一部分に対する対向間隔を拡大しつつ該センサ収容部に押し込み装着される。上記の構成によると、センサ収容部を、板材のラジアル方向へ段階的な曲げ加工により簡単に形成できる。   For example, when the stationary member is an outer ring member and the rotating member is an inner ring member, it can be configured as follows. In other words, the outer ring member and the inner ring member have an extended portion that extends from the rolling element row located on the first end side in the axial direction. An inner ring-side slinger having an L-shaped cross section is attached to the outer circumferential surface of the inner ring member inside the axial opening of the gap formed by the extending portions facing each other, and the inner ring member is positioned at a position facing the inner ring side slinger. An outer ring side slinger having an inverted L-shaped cross section is attached to the peripheral surface. On the opposing surfaces of the inner ring side slinger and the outer ring side slinger, an elastic seal member for blocking foreign matter entering the rolling element row side from the gap is fixed to the inner surface of the outer ring side slinger. Attached so as to be slidable on the inner surface of the slinger. The pulsar ring is fixed to the outer surface of the radial wall portion that rises in the radial direction so as to shield the opening from the inner peripheral surface of the inner ring member of the inner ring side slinger. The sensor holder has a mounting portion formed in a ring shape that is fitted on the first end edge in the axial direction of the outer peripheral surface of the outer ring member, and the sensor housing portion extends radially from the first end edge in the axial direction of the ring-shaped mounting portion. A first portion that extends inward and has a window portion that exposes the sensing surface of the mounted pulse detection sensor, and an axial direction from the tip of the first portion along the radial tip surface of the pulse detection sensor. A pulse detection sensor having a second portion bent back and a third portion extending outward in the radial direction from the tip of the second portion to the back side of the sensing surface of the pulse detection sensor. From the mounting opening on the radially outer side formed by the first part and the third part, the opposing distance of the third part to the first part is increased by elastic deformation of the second part. Push the capacitors housing part is mounted. According to said structure, a sensor accommodating part can be easily formed by a stepwise bending process to the radial direction of a board | plate material.

図１は、駆動輪用の車輪軸受装置を示す。車輪軸受装置１は自動車用のハブユニット（ここでは、駆動輪用）として構成され、内周に複数の軌道面を有する外輪部材２と、前記軌道面の各々に対向する軌道面を有する内輪部材３（一方の軌道面は、別体の内輪３ａの嵌着により形成されている）と、外輪部材２と内輪部材３の対向する軌道面間に介在し、保持器４ａで保持された複列の転動体４とを有する。外輪部材２と内輪部材３とは相対回転可能であり、内輪部材３にはアキシャル方向に車軸挿通孔３ｃを貫通形成している。前記外輪部材２と内輪部材３の転動体配置用の空間は、アキシャル方向における車体アウター側（第二端部側）にて弾性シール５により密封され、同じく車体インナー側（第二端部側）はシール部材１３により密封されている。   FIG. 1 shows a wheel bearing device for a drive wheel. The wheel bearing device 1 is configured as a hub unit for an automobile (here, for a drive wheel), and an outer ring member 2 having a plurality of raceway surfaces on the inner periphery, and an inner ring member having a raceway surface facing each of the raceway surfaces. 3 (one raceway surface is formed by fitting a separate inner ring 3a) and a double row that is interposed between opposed raceway surfaces of the outer ring member 2 and the inner ring member 3 and held by the cage 4a. Rolling elements 4. The outer ring member 2 and the inner ring member 3 are rotatable relative to each other, and an axle insertion hole 3c is formed through the inner ring member 3 in the axial direction. The space for disposing the rolling elements of the outer ring member 2 and the inner ring member 3 is sealed with an elastic seal 5 on the outer side of the vehicle body (second end side) in the axial direction, and also on the inner side of the vehicle body (second end side). Is sealed by a seal member 13.

一方、内輪部材３のアウター側端部の外周に設けた車輪取付けフランジ１０にハブボルト１１で車輪（図示せず）が固定され、外輪部材２が車体側の懸架装置（図示せず）に固定される構造になっている。また、内輪部材３のインナー側端部は、内輪３ａに対してかしめ固定され、転動体４に予圧を与えている。符号３ｂは加締め部分を示している。   On the other hand, a wheel (not shown) is fixed by a hub bolt 11 to a wheel mounting flange 10 provided on the outer periphery of the outer side end of the inner ring member 3, and the outer ring member 2 is fixed to a suspension device (not shown) on the vehicle body side. It has a structure. Further, the inner side end portion of the inner ring member 3 is caulked and fixed to the inner ring 3 a to apply a preload to the rolling elements 4. Reference numeral 3b indicates a caulking portion.

次に、上記前記車輪軸受装置１には回転速度検出装置が組み込まれている。具体的には、内輪３ａのインナー側端部に、図５に示すように、内輪側スリンガ１４を介して装着されたパルサーリング８と、このパルサーリング８に対向するように外輪部材２にセンサホルダ６を介して装着したパルス検知センサ１２とで形成されている。そして、図１に示す外輪部材２の車体インナー側の端部には、パルス検知センサ１２を挿し込み固定するための、図２及び図３に示すステンレス鋼板材からなるセンサホルダ６が装着されている。   Next, the wheel bearing device 1 incorporates a rotational speed detection device. Specifically, as shown in FIG. 5, a pulsar ring 8 mounted on an inner side end of the inner ring 3 a via an inner ring side slinger 14, and a sensor connected to the outer ring member 2 so as to face the pulsar ring 8. It is formed by a pulse detection sensor 12 mounted via a holder 6. A sensor holder 6 made of a stainless steel plate material shown in FIGS. 2 and 3 for inserting and fixing the pulse detection sensor 12 is attached to the end of the outer ring member 2 shown in FIG. 1 on the inner side of the vehicle body. Yes.

図５に示すように、外輪部材２と内輪部材３とは、アキシャル方向第一端側に位置する転動体列よりも延出した延出部２ｅ，３ｅを有する。該延出部２ｅ，３ｅ同士が対向して形成する隙間のアキシャル方向開口の内側にて内輪部材３の外周面に、Ｌ字型断面を有するリング状の内輪側スリンガ１４が取り付けられている。内輪側スリンガ１４は、鋼板材のプレス成形によって形成されたＬ字状断面の環状部材であり、内輪３ａのインナー側端部の外径に圧入して固定されるアキシャル方向壁部１４ａと、このアキシャル方向壁部１４ａの外径側へ屈曲するラジアル方向壁部１４ｂとを有する。   As shown in FIG. 5, the outer ring member 2 and the inner ring member 3 have extension portions 2 e and 3 e that extend from the rolling element row located on the first end side in the axial direction. A ring-shaped inner ring side slinger 14 having an L-shaped cross section is attached to the outer peripheral surface of the inner ring member 3 inside the axial opening of the gap formed by the extending portions 2e and 3e facing each other. The inner ring side slinger 14 is an annular member having an L-shaped cross section formed by press forming of a steel plate material, and an axial direction wall 14a that is press-fitted and fixed to the outer diameter of the inner side end of the inner ring 3a. A radial wall 14b that bends toward the outer diameter side of the axial wall 14a.

また、内輪側スリンガ１４と対向する位置にて外輪部材２の内周面に、逆Ｌ字型断面を有するリング状の外輪側スリンガ１３が取り付けられている。そして、それら内輪側スリンガ１４と外輪側スリンガ１３との対向面には、隙間から転動体列側に侵入しようとする水や異物を遮断するための弾性シール部材１５が、外輪側スリンガ１３の内面に固着される形で内輪側スリンガ１４の内面上を回転摺動可能に取り付けられている。   Further, a ring-shaped outer ring side slinger 13 having an inverted L-shaped cross section is attached to the inner peripheral surface of the outer ring member 2 at a position facing the inner ring side slinger 14. Further, an elastic seal member 15 for blocking water and foreign matters that try to enter the rolling element row side through the gap is provided on the inner surface of the outer ring side slinger 13 on the opposing surface of the inner ring side slinger 14 and the outer ring side slinger 13. Are attached to the inner ring side slinger 14 so as to be able to rotate and slide.

パルサーリング８は、内輪側スリンガ１４の、内輪部材３の内周面から開口を遮蔽する形でラジアル方向に立ち上がるラジアル方向壁部１４ｂの外面に固着されている。パルサーリング８としては、Ｎ極とＳ極を周方向に一定の間隔で多極着磁したゴム磁石、圧延磁石あるいは焼結磁石の他、多数の窓孔や切り欠きを周方向に一定の間隔で設けたものを使用することができる。   The pulsar ring 8 is fixed to the outer surface of the radial wall 14b that rises in the radial direction so as to shield the opening from the inner peripheral surface of the inner ring member 3 of the inner ring side slinger 14. As the pulsar ring 8, in addition to a rubber magnet, a rolled magnet, or a sintered magnet in which the N pole and the S pole are multipolarly magnetized at regular intervals in the circumferential direction, a number of window holes and notches are spaced at regular intervals in the circumferential direction. Can be used.

図４及び図５に示すように、センサホルダ６は、外輪部材２の外周面のアキシャル方向第一端縁部に外嵌するリング状の取付部７を有する。図３に示すように、取付部７の外輪部材２に対する嵌合側開口と反対側に位置するアキシャル方向端縁には、ラジアル方向内向きに張り出す補強フランジ７ｆが形成されている。センサ収容部９は、リング状の取付部７のアキシャル方向第一端縁からラジアル方向内側に延出するとともに、装着されるパルス検知センサ１２のセンシング面１２ｓを露出させる窓部９ｗが形成された第一部分９ｘ（補強フランジ７ｆに一体化されている）と、該第一部分９ｘの先端から、パルス検知センサ１２のラジアル方向先端面に沿ってアキシャル方向に曲げ返される第二部分９ｙと、該第二部分９ｙの先端からパルス検知センサ１２のセンシング面１２ｓの裏側にまわり込む形でラジアル方向外側に延出する第三部分９ｚとを有する曲げ加工部とされている。そして、パルス検知センサ１２は第一部分９ｘと第三部分９ｚが形成するラジアル方向外側の装着開口１２ｔから、第二部分９ｙの弾性変形により、該第三部分９ｚの第一部分９ｘに対する対向間隔を拡大しつつ該センサ収容部９に押し込み装着される。   As shown in FIGS. 4 and 5, the sensor holder 6 has a ring-shaped attachment portion 7 that fits around the first end edge in the axial direction of the outer peripheral surface of the outer ring member 2. As shown in FIG. 3, a reinforcing flange 7 f that protrudes inward in the radial direction is formed on the end edge in the axial direction that is located on the opposite side of the fitting-side opening of the mounting portion 7 with respect to the outer ring member 2. The sensor housing portion 9 is formed with a window portion 9w that extends radially inward from the first end edge in the axial direction of the ring-shaped attachment portion 7 and exposes the sensing surface 12s of the mounted pulse detection sensor 12. A first portion 9x (integrated with the reinforcing flange 7f), a second portion 9y bent in the axial direction along the radial front end surface of the pulse detection sensor 12 from the tip of the first portion 9x, The bending portion has a third portion 9z extending outward in the radial direction so as to wrap around from the tip of the second portion 9y to the back side of the sensing surface 12s of the pulse detection sensor 12. The pulse detection sensor 12 expands the distance between the third portion 9z and the first portion 9x by elastic deformation of the second portion 9y from the radially outer mounting opening 12t formed by the first portion 9x and the third portion 9z. However, it is pushed into the sensor housing 9 and attached.

これにより、図５に示すように、パルス検知センサ１２のセンシング面１２ｓは、そのラジアル方向外側の延長面を被当接面として、外輪４のアキシャル方向端面（基準面）に当て止めされ、パルサーリング８との間に所定のエアギャップを形成した状態で位置決めされる。   As a result, as shown in FIG. 5, the sensing surface 12s of the pulse detection sensor 12 is abutted against the axial end surface (reference surface) of the outer ring 4 with the extended surface on the radially outer side as a contact surface. Positioning is performed with a predetermined air gap formed between the ring 8 and the ring 8.

装着されるパルス検知センサ１２には、図４に示すように、両側面にガイド溝１２ａと、前面に係止溝１２ｂが形成されている。センサ収容部９は枠形であり、その第一部分９ｘには、窓部９ｗの両側縁から内側に張り出す形で、パルス検知センサ１２のヘッドに形成されたガイド溝１２ａに係合するガイド部９ａが曲げ起こしにより形成されている。また、図５に示すように、第三部分９の先端側には、パルス検知センサ１２の裏面側に形成された係止溝１２ｂに嵌合するセンサ付勢保持部９ｂが曲げ形成されている。パルス検知センサ１２の裏面先端側には上り勾配形態のガイドテーパ面１２ｊが形成され、係止溝１２ｂはこのガイドテーパ面１２ｊに続く形で形成されている。装着開口１２ｔからパルス検知センサ１２を装着する際には、係止溝１２ｂに対応する凸状に形成されたセンサ付勢保持部９ｂが、センサ収容部９の第二部分９ｙを弾性的に撓み変形させながらガイドテーパ面１２ｊ上に乗り上げ、係止溝１２ｂ位置までたどり着くと弾性復帰して係止溝１２ｂにはまり込み装着状態となる。この状態で、センサ付勢保持部９ｂは、パルス検知センサ１２を被当接面とは反対側から基準面に向けて押し付け付勢保持する働きを担う。   As shown in FIG. 4, the mounted pulse detection sensor 12 has guide grooves 12a on both side surfaces and locking grooves 12b on the front surface. The sensor accommodating portion 9 has a frame shape, and the first portion 9x has a guide portion that protrudes inward from both side edges of the window portion 9w and engages with a guide groove 12a formed in the head of the pulse detection sensor 12. 9a is formed by bending. Further, as shown in FIG. 5, a sensor urging holding portion 9 b that fits into a locking groove 12 b formed on the back surface side of the pulse detection sensor 12 is formed at the distal end side of the third portion 9 by bending. . An upwardly inclined guide taper surface 12j is formed on the front end side of the back surface of the pulse detection sensor 12, and the locking groove 12b is formed following the guide taper surface 12j. When the pulse detection sensor 12 is mounted from the mounting opening 12t, the sensor biasing holding portion 9b formed in a convex shape corresponding to the locking groove 12b elastically bends the second portion 9y of the sensor housing portion 9. When it gets on the guide taper surface 12j while being deformed and reaches the position of the locking groove 12b, it elastically recovers and is fitted into the locking groove 12b. In this state, the sensor urging holding portion 9b functions to press and hold the pulse detection sensor 12 from the side opposite to the contacted surface toward the reference surface.

センサホルダ６が、素材自体の耐食性が良好なステンレス鋼板材により形成されていることで、長時間使用してもパルス検知センサ１２のセンサホルダからの脱落を防止でき、かつセンサホルダ６への表面処理層の形成が不要なので、衝撃等による表面処理層の傷や剥離等が本質的に生じることがない。   Since the sensor holder 6 is formed of a stainless steel plate material having good corrosion resistance of the material itself, the pulse detection sensor 12 can be prevented from falling off from the sensor holder even when used for a long time, and the surface to the sensor holder 6 can be prevented. Since the formation of the treatment layer is unnecessary, the surface treatment layer is not essentially damaged or peeled off by impact or the like.

上記のセンサホルダ６は、ステンレス鋼板材の打抜き及び曲げ加工により、取付部７とセンサ収容部９（センサ付勢保持部９ｂを含む）とが一体形成されたものであり、例えばステンレス鋼板材としてＳＵＳ４０５等のフェライト系ステンレス鋼板材や、ＳＵＳ３０４等のオーステナイト形成ステンレス鋼板材を用いる場合は、まず、該板材から、取付部７、ガイド部９ａ及びセンサ収容部９となるべき部分を形成したリング状の加工素形状板材を冷間により打ち抜く。次いで、取付部７とガイド部９ａとを冷間プレス成形により形成し、最後に、ラジアル方向内向きに舌状に伸びているセンサ収容部用の被加工部分を、冷間曲げ加工（センサ付勢保持部９ｂは冷間加締め加工による）により順次ラジアル方向外向きに曲げ返してセンサ収容部９となす。センサ収容部９（及びセンサ付勢保持部９ｂ）は、この曲げ加工時に蓄積される歪（加工硬化）により弾性限（降伏点）が向上し、良好なばね保持力特性が付与される。   The sensor holder 6 is formed by integrally forming the mounting portion 7 and the sensor housing portion 9 (including the sensor biasing holding portion 9b) by punching and bending a stainless steel plate material. When a ferritic stainless steel plate material such as SUS405 or an austenite-formed stainless steel plate material such as SUS304 is used, first, a ring shape in which portions to be the mounting portion 7, the guide portion 9a, and the sensor housing portion 9 are formed from the plate material. The processed raw material shape plate material is punched out cold. Next, the mounting portion 7 and the guide portion 9a are formed by cold press forming, and finally, the portion to be processed for the sensor housing portion extending in a radial shape inward in the radial direction is subjected to cold bending processing (with sensor) The force holding portion 9b is bent back outward in the radial direction sequentially by cold caulking) to form the sensor housing portion 9. The sensor accommodating portion 9 (and the sensor biasing holding portion 9b) has an elastic limit (yield point) improved by strain (work hardening) accumulated at the time of bending, and is provided with good spring holding force characteristics.

一方、ステンレス鋼板材としてＳＵＳ４０３等のマルテンサイト系ステンレス鋼板材を用いる場合は、焼きなました板材に上記と同様の加工を施し、その後、焼入れ・焼き戻し処理することにより硬化処理を行なう。この場合、通電加熱等による局所加熱を用いて、センサ収容部９（センサ付勢保持部９ｂ）に選択的に高周波焼入を施し、これを局所的に硬化させることもできる。   On the other hand, when a martensitic stainless steel plate material such as SUS403 is used as the stainless steel plate material, the annealed plate material is processed in the same manner as described above, and then hardened by tempering and tempering. In this case, it is also possible to selectively harden the sensor housing portion 9 (sensor urging holding portion 9b) by using local heating such as energization heating and to harden it locally.

本発明の回転速度検出装置付き軸受装置を、自動車用の駆動輪側ハブユニットして構成した例を示す縦断側面図である。It is a vertical side view which shows the example which comprised the bearing apparatus with a rotational speed detection apparatus of this invention as a driving wheel side hub unit for motor vehicles. センサホルダの正面図。The front view of a sensor holder. センサホルダの縦断側面図。The vertical side view of a sensor holder. 図２のセンサ収容部を、パルス検知センサの装着状態にて拡大して示す部分正面図。The partial front view which expands and shows the sensor accommodating part of FIG. 2 in the mounting state of a pulse detection sensor. 同じく部分縦断側面図。Similarly a partial longitudinal side view.

符号の説明Explanation of symbols

１ 車輪軸受装置
２ 外輪部材
３ 内輪部材
３ａ 内輪
６ センサホルダ
７ 取付部
８ パルサーリング DESCRIPTION OF SYMBOLS 1 Wheel bearing apparatus 2 Outer ring member 3 Inner ring member 3a Inner ring 6 Sensor holder 7 Mounting part 8 Pulsar ring

Claims (3)

アキシャル方向に配列する複数の軌道面が内周面に形成された外輪部材と、
前記軌道面の各々に対向する軌道面が外周面に形成された内輪部材と、
前記外輪部材と前記内輪部材との対向する軌道面間に介在する複列の転動体とを有し、
前記外輪部材と前記内輪部材のうち回転側部材となるもののアキシャル方向第一端側に同心的に取り付けられるパルサーリングと、
前記外輪部材と前記内輪部材のうち静止側部材となるもののアキシャル方向第一端側に、前記パルサーリングに対向する形で取り付けられるパルス検知センサと、
前記静止側部材への取付部と、前記パルス検知センサのセンシング面を前記パルサーリングへの対向方向に位置決めする前記静止側部材側の基準面に対し、前記パルス検知センサの対応する被当接面を当接させた状態で前記パルス検知センサを収容するセンサ収容部と、該センサ収容部に設けられ、前記パルス検知センサを前記被当接面とは反対側から前記静止側部材側の基準面に向けて押し付け付勢保持するセンサ付勢保持部とを、ステンレス鋼板材により一体形成したセンサホルダと、
を有したことを特徴とする回転速度検出装置付き軸受装置。 An outer ring member in which a plurality of raceway surfaces arranged in the axial direction are formed on the inner peripheral surface;
An inner ring member having a raceway surface facing each of the raceway surfaces formed on an outer peripheral surface;
A double row rolling element interposed between the raceways facing the outer ring member and the inner ring member;
A pulsar ring that is concentrically attached to the first end side in the axial direction of the outer ring member and the inner ring member that becomes the rotation side member;
A pulse detection sensor attached to the first end side in the axial direction of the outer ring member and the inner ring member that is a stationary side member, facing the pulsar ring,
The corresponding contacted surface of the pulse detection sensor with respect to the reference surface on the stationary member side for positioning the mounting portion to the stationary member and the sensing surface of the pulse detection sensor in the direction facing the pulsar ring A sensor housing portion for housing the pulse detection sensor in a state where the pulse detection sensor is in contact, and a reference surface on the stationary side member side provided on the sensor housing portion from the side opposite to the contacted surface A sensor urging holding portion that is pressed and held toward the sensor holder integrally formed of a stainless steel plate material; and
A bearing device with a rotational speed detector. 前記センサホルダは、前記ステンレス鋼板材の打抜き及び曲げ加工により前記取付部と前記センサ収容部と前記センサ付勢保持部とが一体形成されたものである請求項１記載の回転速度検出装置付き軸受装置。   The bearing with a rotation speed detecting device according to claim 1, wherein the sensor holder is formed by integrally forming the attachment portion, the sensor housing portion, and the sensor biasing holding portion by punching and bending the stainless steel plate material. apparatus. 前記静止側部材が前記外輪部材とされ、前記回転側部材が前記内輪部材とされるとともに、
それら外輪部材と内輪部材とは、前記アキシャル方向第一端側に位置する転動体列よりも延出した延出部を有し、該延出部同士が対向して形成する隙間のアキシャル方向開口の内側にて、前記内輪部材の外周面にＬ字型断面を有する内輪側スリンガが取り付けられ、これと対向する位置にて前記外輪部材の内周面に逆Ｌ字型断面を有する外輪側スリンガが取り付けられ、それら内輪側スリンガと外輪側スリンガとの対向面には、前記隙間から前記転動体列側に侵入しようとする異物を遮断するための弾性シール部材が、前記外輪側スリンガの内面に固着される形で前記内輪側スリンガの内面上を回転摺動可能に取り付けられ、
前記パルサーリングは、前記内輪側スリンガの、前記内輪部材の内周面から前記開口を遮蔽する形でラジアル方向に立ち上がるラジアル方向壁部の外面に固着され、
前記センサホルダは、前記外輪部材の外周面の前記アキシャル方向第一端縁部に外嵌するリング状に前記取付部が形成され、前記センサ収容部が、前記リング状の取付部の前記アキシャル方向第一端縁からラジアル方向内側に延出するとともに、装着される前記パルス検知センサの前記センシング面を露出させる窓部が形成された第一部分と、該第一部分の先端から、前記パルス検知センサのラジアル方向先端面に沿ってアキシャル方向に曲げ返される第二部分と、該第二部分の先端から前記パルス検知センサの前記センシング面の裏側にまわり込む形でラジアル方向外側に延出する第三部分とを有する曲げ加工部とされ、前記パルス検知センサは前記第一部分と前記第三部分が形成するラジアル方向外側の装着開口から、前記第二部分の弾性変形により、該第三部分の前記第一部分に対する対向間隔を拡大しつつ該センサ収容部に押し込み装着される請求項１又は請求項２に記載の回転速度検出装置付き軸受装置。 The stationary side member is the outer ring member, the rotation side member is the inner ring member,
The outer ring member and the inner ring member each have an extending portion extending from the rolling element row located on the first end side in the axial direction, and an axial opening of a gap formed by the extending portions facing each other. An inner ring side slinger having an L-shaped cross section is attached to the outer peripheral surface of the inner ring member on the inner side of the inner ring member, and an outer ring side slinger having an inverted L-shaped cross section on the inner peripheral surface of the outer ring member at a position facing the inner ring side slinger. And an elastic seal member for blocking foreign matter entering the rolling element row side from the gap is formed on the inner surface of the outer ring side slinger on the opposing surfaces of the inner ring side slinger and the outer ring side slinger. Attached so as to be able to rotate and slide on the inner surface of the inner ring side slinger in a fixed form,
The pulsar ring is fixed to the outer surface of the radial wall portion that rises in the radial direction so as to shield the opening from the inner peripheral surface of the inner ring member of the inner ring side slinger,
The sensor holder has the attachment portion formed in a ring shape that is fitted around the first end edge in the axial direction of the outer peripheral surface of the outer ring member, and the sensor housing portion is in the axial direction of the ring-shaped attachment portion. A first portion that extends inward in the radial direction from the first end edge and that has a window portion that exposes the sensing surface of the mounted pulse detection sensor, and a tip of the first portion, A second portion bent back in the axial direction along the radial front end surface, and a third portion extending outward in the radial direction from the front end of the second portion to the back side of the sensing surface of the pulse detection sensor The pulse detection sensor has a second portion elastic from a mounting opening on the radially outer side formed by the first portion and the third portion. Deformed by the rotational speed detector equipped bearing assembly according to claim 1 or claim 2 expanding the facing distance for said first portion of said third portion is mounted pushed into the sensor housing portion.
JP2007063666A 2007-03-13 2007-03-13 Bearing device with rotational speed detector Expired - Fee Related JP5103960B2 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004211832A (en) * 2003-01-07 2004-07-29 Ntn Corp Bearing device corresponding to sensor
JP2005241351A (en) * 2004-02-25 2005-09-08 Ntn Corp Bearing device with rotational speed detector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004211832A (en) * 2003-01-07 2004-07-29 Ntn Corp Bearing device corresponding to sensor
JP2005241351A (en) * 2004-02-25 2005-09-08 Ntn Corp Bearing device with rotational speed detector

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