JP2005076729A - Rolling bearing device - Google Patents

Rolling bearing device Download PDF

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Publication number
JP2005076729A
JP2005076729A JP2003306998A JP2003306998A JP2005076729A JP 2005076729 A JP2005076729 A JP 2005076729A JP 2003306998 A JP2003306998 A JP 2003306998A JP 2003306998 A JP2003306998 A JP 2003306998A JP 2005076729 A JP2005076729 A JP 2005076729A
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stator
cover
outer ring
peripheral surface
inner peripheral
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JP2003306998A
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JP4238676B2 (en
Inventor
Hirotaka Matsuo
浩敬 松尾
Katsura Koyagi
桂 小八木
Masahiro Inoue
昌弘 井上
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Koyo Seiko Co Ltd
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Koyo Seiko Co 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
    • F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing device equipped with a resolver as a rotation sensor capable of precluding a drop of the sensing accuracy of the resolver by forming its stator as prevented from deformation. <P>SOLUTION: The rolling bearing device is structured so that a cover 9 to block the axial direction open end of its outer ring 1 has a cylindrical portion 91 to be fitted by pressure in the inside surface of the outer ring 1. The stator 13 of the resolver 10 is fitted in a running fit or transition fit in the inside surface of the cylindrical portion 91 of the cover 9 or in the inside surface of the outer ring 1 and is secured about the axial direction in such an arrangement as pinched by a step 11a for receiving the stator formed on the inside surface of the outer ring 1 and a part of the cylindrical portion 91 at its inner end. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、回転センサとしてレゾルバを備えた転がり軸受装置に関する。   The present invention relates to a rolling bearing device including a resolver as a rotation sensor.

鉄道車両や自動車においては、車軸を回転自在に支持するとともに、その車軸の回転数や回転速度等を検出するために、回転センサ付きの転がり軸受装置が使用されている。   In railway vehicles and automobiles, a rolling bearing device with a rotation sensor is used in order to rotatably support an axle and to detect the rotational speed and rotational speed of the axle.

従来、この種の転がり軸受装置では、円周方向に沿って多数の磁極を有するパルサーリングを被検出部として、このパルサーリングに対して、磁気センサを設けたものがある（特許文献１参照）。
特開平１１−１７４０６９号公報 Conventionally, in this type of rolling bearing device, there is a type in which a pulsar ring having a large number of magnetic poles along the circumferential direction is used as a detected portion and a magnetic sensor is provided for the pulsar ring (see Patent Document 1). .
Japanese Patent Laid-Open No. 11-174069

転がり軸受装置では、前記の磁気センサのほかに、回転センサとしてレゾルバを用いることが考えられるが、レゾルバによれば、非回転状態や、回転角度、回転方向も検出することができて、しかも分解能が高い。特に、バリアブル・リラクタンス型のレゾルバでは、被検出部には断面が非円形、もしくは偏心した円形のロータを設ければよく、実施が容易である。   In a rolling bearing device, it is conceivable to use a resolver as a rotation sensor in addition to the magnetic sensor described above. However, according to the resolver, a non-rotation state, a rotation angle, and a rotation direction can be detected, and resolution is also achieved. Is expensive. In particular, in a variable reluctance type resolver, it is only necessary to provide a non-circular or eccentric circular rotor in the section to be detected, which is easy to implement.

ところで、レゾルバの組み込みに当たっては、レゾルバのステータは、固定輪である外輪の側に取り付けられるが、その取り付け方は、一定しておらず、取り付け方によっては、ステータ、特にその鉄心が変形し応力が加わることがある。ステータに応力が加わると、透磁率が変化し、回転検出の精度に悪影響を及ぼす。   By the way, when the resolver is assembled, the resolver stator is attached to the outer ring side which is a fixed ring, but the attachment method is not constant, and depending on the attachment method, the stator, particularly its iron core, is deformed and stressed. May be added. When stress is applied to the stator, the permeability changes, which adversely affects the accuracy of rotation detection.

本発明は、外輪の軸方向一端を閉塞するカバーと、このカバーの内側で内輪の回転検出を行うレゾルバとを備え、前記レゾルバのステータが前記外輪側に設けられるとともに、前記レゾルバのロータが前記内輪側に設けられている転がり軸受装置であって、前記カバーは、前記外輪の内周面に圧入により嵌着される円筒部を有し、前記ステータは、前記カバーの円筒部の内周面もしくは前記外輪の内周面に、すきまばめもしくは中間ばめにより嵌合され、かつ前記外輪の内周面に形成されたステータ受け止め用の段部と、前記カバーの円筒部の内端側の部分との間に挟まれて軸方向に固定されている。   The present invention includes a cover that closes one axial end of the outer ring, and a resolver that detects rotation of the inner ring inside the cover, a stator of the resolver is provided on the outer ring side, and a rotor of the resolver is In the rolling bearing device provided on the inner ring side, the cover has a cylindrical portion that is press-fitted to the inner peripheral surface of the outer ring, and the stator has an inner peripheral surface of the cylindrical portion of the cover Alternatively, a stator receiving step formed on the inner peripheral surface of the outer ring and fitted on the inner peripheral surface of the outer ring by clearance fit or intermediate fit, and on the inner end side of the cylindrical portion of the cover It is sandwiched between the parts and fixed in the axial direction.

上記の構成において、ステータと外輪もしくはカバーとの嵌合は、すきまばめもしくは中間ばめとしているから、ステータには外径側から過大な力が作用せず、変形することがない。したがって、ステータの変形に伴う検出精度の低下は生じない。   In the above configuration, since the stator and the outer ring or the cover are fitted with a clearance fit or an intermediate fit, an excessive force is not applied to the stator from the outer diameter side and the stator is not deformed. Therefore, the detection accuracy is not lowered due to the deformation of the stator.

この場合、ステータの外周面は、外輪等の内周面に強固に固定されないが、ステータの側面部は、外輪の受け止め用の段部と、カバーの円筒部の内端もしくは円筒部の内端側の段部との間に挟まれて軸方向に固定されるから、ステータの位置が所要の位置に確定する。   In this case, the outer peripheral surface of the stator is not firmly fixed to the inner peripheral surface of the outer ring or the like, but the side surface portion of the stator includes the step for receiving the outer ring and the inner end of the cylindrical portion of the cover or the inner end of the cylindrical portion. Since it is sandwiched between the step portion on the side and fixed in the axial direction, the position of the stator is fixed at a required position.

また、ステータの軸方向外側はカバーで閉塞されており、このカバーの円筒部と外輪とは金属どうしの嵌合であるから、長く使用しても両者間にすきまができるおそれがなく、水密性が高く、ステータに対する防水が確実である。   Also, the outer side of the stator in the axial direction is closed with a cover, and the cylindrical part of the cover and the outer ring are fitted with metal, so there is no risk of a gap between them even if used for a long time. Is high and waterproof against the stator is certain.

上記構成の転がり軸受装置の一実施形態として、カバーの円筒部の内周面の軸方向内端部に、内周面よりも大きな内径を有する大径部が形成され、この大径部に前記ステータが嵌合され、前記大径部と内周面との間に形成された段部と、外輪の前記受け止め用の段部との間でステータを軸方向に挟み、前記外輪の内周面における前記カバーのステータ嵌合位置の外周に相当する個所には、カバーの拡径を許容する環状の凹部が形成されている場合がある。この実施形態では、ステータは、外輪内周の受け止め用の段部とカバーの内周面の段部との間に挟まれて軸方向位置が固定されるから、取り付け位置が確定する。   As one embodiment of the rolling bearing device having the above-described configuration, a large-diameter portion having an inner diameter larger than the inner peripheral surface is formed at the axially inner end portion of the inner peripheral surface of the cylindrical portion of the cover. A stator is fitted, and the stator is axially sandwiched between a step formed between the large-diameter portion and the inner peripheral surface and the receiving step of the outer ring, and the inner peripheral surface of the outer ring. In some cases, an annular recess that allows the cover to expand in diameter is formed at a position corresponding to the outer periphery of the stator fitting position of the cover. In this embodiment, the stator is sandwiched between the receiving step on the inner periphery of the outer ring and the step on the inner peripheral surface of the cover, and the axial position is fixed, so the mounting position is fixed.

この場合、ステータを保持しているカバーの円筒部を、外輪の内周面内に圧入する際、カバーの円筒部からステータには大きな力が作用するが、カバーの円筒部を所定位置まで圧入した状態では、円筒部の内端は、外径側に拡径変形しうるから、ステータには過大な力が作用せず、ステータが変形するおそれはない。   In this case, when the cylindrical portion of the cover holding the stator is pressed into the inner peripheral surface of the outer ring, a large force acts on the stator from the cylindrical portion of the cover, but the cylindrical portion of the cover is pressed into a predetermined position. In this state, the inner end of the cylindrical portion can be expanded and deformed to the outer diameter side, so that an excessive force does not act on the stator and there is no possibility that the stator will be deformed.

また、上記構成では、組み立てに際して、まず、カバーの円筒部の内周にある大径部にステータを嵌合し、そのステータのリード線の接続等、必要な配線処理をすべてカバーの側で済ませてから、そのステータ付きのカバーを外輪の内周面にはめ込めばよく、ステータとカバーとを各別に外輪に取り付ける場合に比べ、組み立て作業を効率よく行える。   In the above configuration, when assembling, first, the stator is fitted to the large diameter portion on the inner periphery of the cylindrical portion of the cover, and all necessary wiring processing such as connection of the lead wires of the stator is completed on the cover side. Then, it is only necessary to fit the cover with the stator to the inner peripheral surface of the outer ring, and the assembly work can be performed more efficiently than when the stator and the cover are separately attached to the outer ring.

本発明によれば、外輪の内周側にレゾルバのステータを取り付けるにもかかわらず、ステータには外径側から過大な力が作用せず、ステータが変形することがなく、ステータの変形と伴う検出精度の低下を防止することができる。   According to the present invention, although the resolver stator is attached to the inner peripheral side of the outer ring, an excessive force does not act on the stator from the outer diameter side, the stator is not deformed, and is accompanied by deformation of the stator. A decrease in detection accuracy can be prevented.

以下、本発明の詳細を図面に基づいて説明すると、図１ないし図３は、本発明の最良の実施形態に係り、図１は転がり軸受装置の軸方向に沿った断面図、図２は、図１の（２）−（２）線での断面図、図３は、図１の要部の拡大断面図である。   Hereinafter, the details of the present invention will be described with reference to the drawings. FIGS. 1 to 3 relate to the best embodiment of the present invention, FIG. 1 is a sectional view along the axial direction of a rolling bearing device, and FIG. 1 is a cross-sectional view taken along line (2)-(2) in FIG. 1, and FIG. 3 is an enlarged cross-sectional view of the main part of FIG.

図１において、左側が車両アウタ側(車輪側)で、右側が車両インナ側(反車輪側)である。本実施形態の転がり軸受装置は、自動車の従動輪を支持する複列アンギュラ玉軸受タイプの転がり軸受装置であって、外輪１と、内軸２と、内輪３と、複数の玉からなる転動体４，５と、二つの保持器６，７と、単一のシール８と、カバー９と、回転センサとしてのレゾルバ１０とを含むものである。   In FIG. 1, the left side is the vehicle outer side (wheel side), and the right side is the vehicle inner side (counter wheel side). The rolling bearing device of the present embodiment is a double-row angular ball bearing type rolling bearing device that supports a driven wheel of an automobile, and is a rolling element including an outer ring 1, an inner shaft 2, an inner ring 3, and a plurality of balls. 4 and 5, two cages 6, 7, a single seal 8, a cover 9, and a resolver 10 as a rotation sensor.

外輪１は、キャリアのような車体側の部材に非回転に固定されるもので、内周に複列に軌道部１ａ，１ｂを有する。内軸２は、車両アウタ側にインロー部２１と車輪取り付け用のフランジ部２２とを有し、このフランジ部２２より車両インナ側の外周面に、外輪１の車両アウタ側の軌道部１ａに対応する軌道部２ａが形成されている。フランジ部２２には、これを貫通する状態で、車輪やブレーキ用のディスクロータ（いずれも図示せず）を固定するためのボルト１１が圧入固定されている。   The outer ring 1 is non-rotatably fixed to a member on the vehicle body side such as a carrier, and has raceways 1a and 1b in double rows on the inner periphery. The inner shaft 2 has an inlay portion 21 and a wheel mounting flange portion 22 on the vehicle outer side, and corresponds to a track portion 1 a on the vehicle outer side of the outer ring 1 on the outer peripheral surface on the vehicle inner side from the flange portion 22. A track portion 2a is formed. A bolt 11 for fixing a wheel or a brake disk rotor (both not shown) is press-fitted and fixed to the flange portion 22 in a state of passing through the flange portion 22.

内輪３は、外輪１の車両インナ側の軌道部１ｂに対応する軌道部３ｂを有するもので、内軸２の車両インナ側に形成された小径部２３の外周に嵌着されて、小径部２３より車両インナ側に形成されたねじ部２４に螺合されたナット１２の締め付けにより、内軸２に対して固定されている。転動体４，５は、複数の玉からなり、外輪１の一方の軌道部１ａと内軸２の軌道部２ａとの間、および外輪１の他方の軌道部１ｂと内輪３の軌道部３ｂとの間に、それぞれ介装されて、保持器６，７により転動自在に保持されている。シール８は、外輪１の車両アウタ側端部と内軸２との間に設けられている。   The inner ring 3 has a track part 3 b corresponding to the track part 1 b on the vehicle inner side of the outer ring 1, and is fitted on the outer periphery of a small diameter part 23 formed on the vehicle inner side of the inner shaft 2. The nut 12 is fastened to the inner shaft 2 by tightening the nut 12 screwed into the screw portion 24 formed on the vehicle inner side. The rolling elements 4 and 5 are composed of a plurality of balls, between one raceway portion 1a of the outer ring 1 and the raceway portion 2a of the inner shaft 2, and between the other raceway portion 1b of the outer ring 1 and the raceway portion 3b of the inner ring 3. And are held by the cages 6 and 7 so as to be freely rotatable. The seal 8 is provided between the vehicle outer side end of the outer ring 1 and the inner shaft 2.

カバー９は、有底円筒形の形状により外輪１の車両インナ側の開放部を閉塞するもので、その円筒部９１が、外輪１の車両インナ側に円筒状に形成された突出部１１の内周に圧入により嵌着されている。   The cover 9 closes the open part of the outer ring 1 on the vehicle inner side by a bottomed cylindrical shape, and the cylindrical part 91 is an inner part of the projecting part 11 formed in a cylindrical shape on the vehicle inner side of the outer ring 1. It is fitted around the circumference by press-fitting.

レゾルバ１０は、ブラシレスタイプの１種であるバリアブル・リラクタンス型（磁気抵抗変化型）で、ステータ１３とロータ１４とからなり、カバー９の内側で内輪３の回転検出を行うよう、ステータ１３が固定輪である外輪１の内周側に設けられ、ロータ１４が回転輪である内輪３の側に設けられている。ステータ１３は、図２に示すように、リング状で内径側に多数の極歯１３１ａを有する鉄心１３１と、鉄心１３１の各極歯１３１ａに巻装したコイル１３２とから構成されたもので、各コイル１３２は、励磁用の巻線部１３２ａと検出用の巻線部１３２ｂとからなる。   The resolver 10 is a variable reluctance type (magnetic resistance change type), which is one type of brushless type, and includes a stator 13 and a rotor 14. The stator 13 is fixed so that the rotation of the inner ring 3 is detected inside the cover 9. It is provided on the inner peripheral side of the outer ring 1 that is a ring, and the rotor 14 is provided on the side of the inner ring 3 that is a rotating wheel. As shown in FIG. 2, the stator 13 includes a ring-shaped iron core 131 having a large number of pole teeth 131 a on the inner diameter side, and coils 132 wound around the pole teeth 131 a of the iron core 131. The coil 132 includes a winding part 132a for excitation and a winding part 132b for detection.

本発明では、転がり軸受装置へのレゾルバ１０の組み込み方、特に、ステータ１３の外輪１への取り付け方に特徴がある。   The present invention is characterized by the manner in which the resolver 10 is incorporated into the rolling bearing device, in particular, the manner in which the stator 13 is attached to the outer ring 1.

外輪１の突出部１１の内周には、図３に拡大して示すように、ステータ１３に対応して、受け止め用段部１１ａが円周方向に沿って形成されている。この段部１１ａに受け止められる状態で、ステータ１３は、外輪１の突出部１１の内周に、すきまばめもしくは中間ばめにより嵌合されている。前記したカバー９は、このステータ１３より軸方向外方で、外輪１の突出部１１の内周に圧入により嵌着されている。そして、ステータ１３は、外輪１の受け止め用の段部１１ａと、カバー９の円筒部９１の内端部との間に挟み込まれて、その挟持により軸方向位置が固定されている。ステータ１３のコイル１３２からのリード線１３２ｃは、カバー９に形成された孔９ａから外部に引き出されるか、カバー９の前記孔９ａに設けたコネクタに接続される。   On the inner periphery of the protruding portion 11 of the outer ring 1, as shown in an enlarged view in FIG. 3, a receiving step portion 11 a is formed along the circumferential direction corresponding to the stator 13. The stator 13 is fitted to the inner periphery of the protruding portion 11 of the outer ring 1 by a clearance fit or an intermediate fit while being received by the stepped portion 11a. The above-described cover 9 is fitted to the inner periphery of the protruding portion 11 of the outer ring 1 by press-fitting on the outer side in the axial direction from the stator 13. The stator 13 is sandwiched between the step 11 a for receiving the outer ring 1 and the inner end of the cylindrical portion 91 of the cover 9, and the axial position is fixed by the sandwiching. A lead wire 132c from the coil 132 of the stator 13 is drawn out from a hole 9a formed in the cover 9 or connected to a connector provided in the hole 9a of the cover 9.

レゾルバ１０のロータ１４は、内輪３の肩部を径方向断面が偏心した円形もしくは非円形になるよう切削することにより、内輪３に一体に設けられている。   The rotor 14 of the resolver 10 is provided integrally with the inner ring 3 by cutting the shoulder portion of the inner ring 3 into a circular shape or a non-circular shape in which the radial cross section is eccentric.

上記の構成において、ステータ１３と外輪１との嵌合は、すきまばめもしくは中間ばめとなっているから、外輪１からステータ１３には過大な力が作用せず、変形することがない。したがって、ステータ１３の変形に伴う検出精度の低下は防止される。   In the above configuration, since the fitting between the stator 13 and the outer ring 1 is a clearance fit or an intermediate fit, an excessive force is not applied to the stator 13 from the outer ring 1 and the stator 13 is not deformed. Therefore, a decrease in detection accuracy due to the deformation of the stator 13 is prevented.

この場合、ステータ１３の側面部（軸方向内外に向く面部）は、外輪１の受け止め用の段部１１ａと、カバー９の円筒部９１の内端との間に挟まれるから、ステータ１３は軸方向に固定され、取り付け位置が確定する。   In this case, since the side surface portion (surface portion facing inward and outward in the axial direction) of the stator 13 is sandwiched between the stepped portion 11a for receiving the outer ring 1 and the inner end of the cylindrical portion 91 of the cover 9, the stator 13 has a shaft It is fixed in the direction and the mounting position is fixed.

また、ステータ１３の軸方向外側を覆うカバー９は、外輪１の突出部１１の内周に嵌合しており、カバー９と外輪１とは金属どうしの嵌合であるから、長く使用しても両者間にすきまができるおそれがなく、ステータ１３に対する防水が確実である。   Further, the cover 9 covering the outer side of the stator 13 in the axial direction is fitted to the inner periphery of the protruding portion 11 of the outer ring 1, and the cover 9 and the outer ring 1 are fitted with metal, so that they are used for a long time. However, there is no possibility that a gap will be formed between them, and the stator 13 is reliably waterproofed.

図４および図５は、本発明の他の実施形態に係り、図４は、他の実施形態に係る転がり軸受装置の軸方向に沿った半断面図、図５は、図４の要部の拡大断面図である。   4 and 5 relate to another embodiment of the present invention, FIG. 4 is a half sectional view along the axial direction of a rolling bearing device according to another embodiment, and FIG. It is an expanded sectional view.

この実施形態でも、レゾルバ１０は、カバー９の内側で内輪３の回転検出を行うよう、ステータ１３が外輪１の内周側に設けられ、ロータ１４が内輪２の側に設けられるが、ステータ１３は、カバー９を介して外輪１の突出部１１の内周側に取り付けられている。   Also in this embodiment, in the resolver 10, the stator 13 is provided on the inner peripheral side of the outer ring 1 and the rotor 14 is provided on the inner ring 2 side so that the rotation of the inner ring 3 is detected inside the cover 9. Is attached to the inner peripheral side of the protruding portion 11 of the outer ring 1 through a cover 9.

すなわち、カバー９の円筒部９１の内端側の内周面には、円筒部９１を内径側から薄肉に切削することにより、ステータ１３嵌合用で円筒部９１内周面の他の部分より大径の大径部９１ａが形成され、この大径部部９１ａの軸方向外側には、ステータ挟持用の段部９１ｂが形成されている。そして、カバー９の大径部９１ａの内周に、ステータ１３がすきまばめもしくは中間ばめにより嵌合されている。ステータ１３のコイル１３２からのリード線１３２ｃは、カバー９に設けたコネクタ１５に接続されている。ステータ１３、リード線１３２ｃ、およびコネクタ１５のうち、少なくともリード線１３２ｃは、樹脂１６で被覆され、カバー９の内面に対して固定されている。   That is, the cylindrical portion 91 is cut into a thin wall from the inner diameter side on the inner peripheral surface of the cylindrical portion 91 of the cover 9 so that it is larger than other portions of the inner peripheral surface of the cylindrical portion 91 for fitting the stator 13. A large-diameter portion 91a having a diameter is formed, and a step portion 91b for holding the stator is formed outside the large-diameter portion 91a in the axial direction. The stator 13 is fitted to the inner periphery of the large-diameter portion 91a of the cover 9 by a clearance fit or an intermediate fit. A lead wire 132 c from the coil 132 of the stator 13 is connected to a connector 15 provided on the cover 9. Of the stator 13, the lead wire 132 c, and the connector 15, at least the lead wire 132 c is covered with the resin 16 and fixed to the inner surface of the cover 9.

一方、外輪１の突出部１１の内周には、図５に拡大して示すように、ステータ１３に対応して、受け止め用段部１１ａが円周方向に沿って形成されるとともに、この段部１１ａより軸方向外側には、環状の凹部１１ｂが形成されている。   On the other hand, on the inner periphery of the protruding portion 11 of the outer ring 1, as shown in an enlarged view in FIG. 5, a receiving step portion 11 a is formed along the circumferential direction corresponding to the stator 13. An annular recess 11b is formed on the outer side in the axial direction from the portion 11a.

カバー９は、その円筒部９１の内周にステータ１３を保持する状態で、外輪１の突出部１１の内周に所定深さまで圧入により嵌着されている。カバー９が外輪１の内周に所定深さまで圧入された状態では、ステータ１３は、外輪１の受け止め用段部１１ａに受け止められ、この受け止め用段部１１ａと、カバー９の挟持用の段部９１ｂとの間に挟まれて、軸方向位置が固定されている。   The cover 9 is fitted to the inner periphery of the protruding portion 11 of the outer ring 1 by press-fitting to a predetermined depth while holding the stator 13 on the inner periphery of the cylindrical portion 91. In a state in which the cover 9 is press-fitted to the inner circumference of the outer ring 1 to a predetermined depth, the stator 13 is received by the receiving step 11 a of the outer ring 1, and the receiving step 11 a and the step 9 for holding the cover 9 are held. It is sandwiched between 91b and the position in the axial direction is fixed.

また、カバー９が外輪１の内周に所定深さまで圧入された状態では、カバー９のステータ嵌合用の大径部９１ａの外周には、環状の凹部１１ｂが臨むようになっている。この環状の凹部１１ｂは、カバー９の大径部９１ａの外径側への拡径変形を許容する部分である。他の構成は、図１ないし図３の実施形態のものと変わりがないので、共通する部分には同一の符号を付して、その説明は省略する。   When the cover 9 is press-fitted to the inner periphery of the outer ring 1 to a predetermined depth, an annular recess 11b faces the outer periphery of the large-diameter portion 91a for stator fitting of the cover 9. The annular recess 11b is a part that allows the diameter-enlargement deformation of the large-diameter portion 91a of the cover 9 toward the outer diameter side. Since other configurations are the same as those of the embodiment of FIGS. 1 to 3, common portions are denoted by the same reference numerals and description thereof is omitted.

上記の構成において、ステータ１３とカバー９との嵌合は、すきまばめもしくは中間ばめとなっており、しかも、カバー９の大径部９１ａは、拡径変形が許容されているから、カバー９からステータ１３には過大な力が作用せず、ステータ１３が変形することがない。この場合、ステータ１３は、外輪１の受け止め用の段部１１ａと、カバー９の挟持用の段部９１ｂとの間に挟まれるから、軸方向に固定され、取り付け位置に確定する。さらに、ステータ１３の軸方向外側を覆うカバー９は、外輪１と金属どうしのはめあいとなるから、長く使用しても、両者間に水が浸入するすきまができるおそれがない。   In the above configuration, the fitting between the stator 13 and the cover 9 is a clearance fit or an intermediate fit, and the large-diameter portion 91a of the cover 9 is allowed to undergo a diameter expansion deformation. No excessive force acts on the stator 13 from 9 and the stator 13 is not deformed. In this case, since the stator 13 is sandwiched between the step 11a for receiving the outer ring 1 and the step 91b for holding the cover 9, it is fixed in the axial direction and fixed at the mounting position. Furthermore, since the cover 9 covering the outer side in the axial direction of the stator 13 fits between the outer ring 1 and the metal, there is no possibility that there will be a gap for water to enter between the two even if used for a long time.

組み立てに際しては、まず、カバー９の円筒部９１の内周面にステータ１３を嵌合し、そのステータ１３のリード線１３２ｃの接続等、必要な配線処理をすべてカバー９の側で済ませてから、そのステータ１３付きのカバー９を外輪１の内周面に圧入すればよく、ステータ１３とカバー９とを各別に外輪１に取り付ける場合に比べ、組み立て作業を効率よく行える。   When assembling, first, the stator 13 is fitted to the inner peripheral surface of the cylindrical portion 91 of the cover 9, and all necessary wiring processing such as connection of the lead wires 132c of the stator 13 is completed on the cover 9 side. The cover 9 with the stator 13 may be press-fitted into the inner peripheral surface of the outer ring 1, and assembly work can be performed more efficiently than when the stator 13 and the cover 9 are separately attached to the outer ring 1.

上記の各実施形態では、内輪３の肩部を切削することにより、ロータ１４を内輪３と一体に設けたが、ロータ１４を内輪３とは別部材として構成し、これを内輪３に取り付けるようにしてもよい。また、各実施形態では、内軸２のねじ部２４に螺合されるナット１２の締め付けで、内輪３を内軸２に固定したが、内軸２の一部を外径側にかしめることで、内輪３を内軸２に固定するようにしてもよく、また、内軸２の中心部を貫通するねじ軸と、これに螺合するナットとで、内輪３を内軸２に固定するようにしてもよい。さらに、転動体は玉に限らず、円すいころであってもよい。   In each of the above embodiments, the rotor 14 is provided integrally with the inner ring 3 by cutting the shoulder of the inner ring 3. However, the rotor 14 is configured as a separate member from the inner ring 3 and is attached to the inner ring 3. It may be. Further, in each embodiment, the inner ring 3 is fixed to the inner shaft 2 by tightening the nut 12 screwed into the threaded portion 24 of the inner shaft 2, but a part of the inner shaft 2 is caulked to the outer diameter side. Thus, the inner ring 3 may be fixed to the inner shaft 2, and the inner ring 3 is fixed to the inner shaft 2 with a screw shaft that passes through the central portion of the inner shaft 2 and a nut that is screwed to the screw shaft. You may do it. Further, the rolling elements are not limited to balls, but may be tapered rollers.

このほか、本発明は、内軸２の外周に単列の内輪３を設けるタイプの転がり軸受装置に限らず、内軸の外周に内輪を複列に設けるタイプの転がり軸受装置にも実施することができる。   In addition, the present invention is not limited to a type of rolling bearing device in which a single row of inner rings 3 is provided on the outer periphery of the inner shaft 2, but is also applied to a type of rolling bearing device in which inner rings are provided in a double row on the outer periphery of the inner shaft. Can do.

本発明の最良の実施形態に係る転がり軸受装置の軸方向に沿った断面図Sectional drawing along the axial direction of the rolling bearing apparatus which concerns on best embodiment of this invention. 図１の（２）−（２）線での断面図Sectional view taken along line (2)-(2) in FIG. 図１の要部の拡大断面図1 is an enlarged cross-sectional view of the main part of FIG. 本発明の他の実施形態に係る転がり軸受装置の軸方向に沿った半断面図Half sectional view along the axial direction of a rolling bearing device according to another embodiment of the present invention. 図４の要部の拡大断面図4 is an enlarged cross-sectional view of the main part of FIG.

符号の説明Explanation of symbols

１ 外輪 １１ａ 外輪の受け止め用段部
２ 内軸 ３ 内輪
９ カバー ９１ カバーの円筒部
１０ レゾルバ １３ ステータ １４ ロータ DESCRIPTION OF SYMBOLS 1 Outer ring 11a Step part for receiving outer ring 2 Inner shaft 3 Inner ring 9 Cover 91 Cylindrical part of cover 10 Resolver 13 Stator 14 Rotor

Claims (2)

外輪の軸方向一端を閉塞するカバーと、このカバーの内側で内輪の回転検出を行うレゾルバとを備え、前記レゾルバのステータが前記外輪側に設けられるとともに、前記レゾルバのロータが前記内輪側に設けられている転がり軸受装置であって、
前記カバーは、前記外輪の内周面に圧入により嵌着される円筒部を有し、前記ステータは、前記カバーの円筒部の内周面もしくは前記外輪の内周面に、すきまばめもしくは中間ばめにより嵌合され、かつ前記外輪の内周面に形成されたステータ受け止め用の段部と、前記カバーの円筒部の内端側の部分との間に挟まれて軸方向に固定されている、転がり軸受装置。 A cover that closes one end of the outer ring in the axial direction; and a resolver that detects rotation of the inner ring inside the cover. A stator of the resolver is provided on the outer ring side, and a rotor of the resolver is provided on the inner ring side. A rolling bearing device,
The cover has a cylindrical portion that is press-fitted to the inner peripheral surface of the outer ring, and the stator has a clearance fit or intermediate fit on the inner peripheral surface of the cylindrical portion of the cover or the inner peripheral surface of the outer ring. Fitted with a fit and sandwiched between a stator receiving step formed on the inner peripheral surface of the outer ring and a portion on the inner end side of the cylindrical portion of the cover and fixed in the axial direction Rolling bearing device. 請求項１に記載の転がり軸受装置において、
前記カバーの円筒部の内周面の軸方向内端部に、内周面よりも大きな内径を有する大径部が形成され、この大径部に前記ステータが嵌合され、前記大径部と内周面との間に形成された段部と、外輪の前記受け止め用の段部との間でステータを軸方向に挟み、前記外輪の内周面における前記カバーのステータ嵌合位置の外周に相当する個所には、カバーの拡径を許容する環状の凹部が形成されている、転がり軸受装置。


The rolling bearing device according to claim 1,
A large-diameter portion having an inner diameter larger than the inner peripheral surface is formed at an axially inner end portion of the inner peripheral surface of the cylindrical portion of the cover, and the stator is fitted to the large-diameter portion, The stator is axially sandwiched between a step formed between the inner peripheral surface and the receiving step of the outer ring, and on the outer periphery of the cover on the inner peripheral surface of the outer ring at the stator fitting position. A rolling bearing device in which an annular recess that allows the cover to expand in diameter is formed at a corresponding portion.


JP2003306998A 2003-08-29 2003-08-29 Rolling bearing device Expired - Fee Related JP4238676B2 (en)

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Applications Claiming Priority (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1764521A3 (en) * 2005-09-14 2008-11-26 JTEKT Corporation Sensor-equipped rolling bearing assembly
DE112007001983T5 (en) 2006-08-25 2009-07-02 Ntn Corp. Wheel bearing assembly equipped with a rotary sensor
JP2011240769A (en) * 2010-05-17 2011-12-01 Ntn Corp In-wheel motor drive device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1764521A3 (en) * 2005-09-14 2008-11-26 JTEKT Corporation Sensor-equipped rolling bearing assembly
DE112007001983T5 (en) 2006-08-25 2009-07-02 Ntn Corp. Wheel bearing assembly equipped with a rotary sensor
US8378665B2 (en) 2006-08-25 2013-02-19 Ntn Corporation Rotation sensor-equipped bearing device for wheel
JP2011240769A (en) * 2010-05-17 2011-12-01 Ntn Corp In-wheel motor drive device

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