JP4003446B2 - Bearing device - Google Patents

Bearing device Download PDF

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Publication number
JP4003446B2
JP4003446B2 JP2001359383A JP2001359383A JP4003446B2 JP 4003446 B2 JP4003446 B2 JP 4003446B2 JP 2001359383 A JP2001359383 A JP 2001359383A JP 2001359383 A JP2001359383 A JP 2001359383A JP 4003446 B2 JP4003446 B2 JP 4003446B2
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Japan
Prior art keywords
shaft body
flange
shaft
inner ring
press
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Expired - Fee Related
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JP2001359383A
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Japanese (ja)
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JP2003159904A (en
Inventor
哲明 沼田
孝爾 嶋
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JTEKT Corp
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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
    • F16C19/185—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 two raceways provided integrally on a part other than a race ring, e.g. a shaft or housing
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/588—Races of sheet metal
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)
  • Support Of The Bearing (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、車両用ハブユニットなど、軸体の外周に転がり軸受を装着してなる軸受装置に関する。
【０００２】
【従来の技術】
車両用のハブユニットは、一般に、ハブホイールの軸体の外周に、複列の転がり軸受が抜け止め状態で装着された構造を有する。
【０００３】
転がり軸受は、例えば内輪回転の場合、軸体の外周に装着した内輪、ステアリングナックルを介して車体に固定した外輪、内輪と外輪の間に配置した複列の転動体、転動体を保持した保持器、端部を閉蓋したシール部材等にて構成されている。
【０００４】
【発明が解決しようとする課題】
従来より、転がり軸受を取り付ける軸体は、軸受の負荷に耐え得るような高強度な材料を用いて、鍛造にて形成している。
【０００５】
しかし、鍛造の場合、加工に手間が掛かりコスト高になったり、重量も重くなる可能性があった。
【０００６】
この発明は、製造性に優れ、軽量で安価な軸受装置を提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明の軸受装置は、軸体と、前記軸体の外周面に装着した内輪と、前記内輪の外周に同心状に回転可能に配置した外輪と、前記内輪と前記外輪の間に介装した転動体とを備え、前記軸体が、深絞りプレス成形品にて形成されており、軸心方向に直線状に延びる軸部と、軸部の端部から径方向外向きに延びるフランジとからなり、前記軸体のフランジ側に、ブレーキディスクやホイール等を支持する深絞りプレス成形品にて形成された支持部材を、前記軸部から前記フランジに渡って内接させて圧入しており、 前記支持部材の反フランジ側に外周面にねじ溝を有した締結部を形成し、前記締結部にナットを螺合し内輪の軸方向端面に締結することにより、転動体に予圧を付与して前記内輪を軸体に固定したことを特徴とするものである。
【０００８】
なお、軸体のフランジを軸部より厚肉としたり、軸体のフランジの基部に断面略Ｓ字状に屈曲した屈曲部を形成してもよい。
【０００９】
また、軸体の反フランジ側に外周面にねじ溝を有した締結部を形成し、前記締結部にナットを螺合し内輪の軸方向端面に締結することにより、転動体に予圧を付与して前記内輪を前記軸体に固定してもよい。
【００１０】
本発明の軸受装置によると、軸体が深絞りプレス成形品にて形成されており、塑性加工を中心とした加工により容易に製造でき、製造コストの低減を図ることができる。しかも、プレス成形品であるため、中空で余肉を削減でき、軽量化が図れる。
【００１１】
また、軸体のフランジを軸部より厚肉としたり、軸体のフランジの基部に断面略Ｓ字状に屈曲した屈曲部を形成することで、フランジの曲げ剛性が向上する。
【００１５】
【発明の実施の形態】
（実施の形態１）
本発明の実施の形態１について、図１ないし図３を用いて説明する。
【００１６】
図１は、実施の形態１における車両用の従動輪側におけるハブユニットからなる内輪回転の軸受装置の断面図を示している。
【００１７】
図１において、１は車輪が取り付けられるハブホイールであり、ハブホイール１の環状の軸体２の外周面には、車両インナ側から圧入して複列の転がり軸受３が外嵌装着されている。
【００１８】
複列の転がり軸受３は内輪回転のアンギュラ玉軸受からなり、一対の内輪３１，３２、ステアリングナックルを介して車体に固定され内周面に一対の外輪軌道３４，３５を有した外輪３３、内輪３１，３２の軌道ならびに外輪軌道３４，３５に沿って配置した複列の転動体となる玉３６，３７、各列の玉３６，３７を保持した保持器３８、車両アウタ側端部を閉蓋したシール部材３９にて構成されている。
【００１９】
転がり軸受３は、軸体２の外周面に車両インナ側から圧入した後、軸体２にナット４０を螺合して車両インナ側の内輪３２の軸方向端面に締結し、さらに車両インナ側からカバー４１を被せる。このようにして、玉３６，３７に十分な予圧を付与して、転がり軸受３を軸体２に固定する。
【００２０】
次に、軸受装置の各部の構成について詳細に説明する。
【００２１】
まず、軸体２は、低炭素鋼等の平板を薄肉に深絞りプレス成形してなる。図２に示すように、軸体２は、軸心方向に直線状に延びる軸部２１と、軸部２１の車両アウタ側端部から径方向外向きに延びるフランジ２２と、軸部２１の車両インナ側に段部２３を介して形成され外周面にナット４０を螺合するねじ溝を有した締結部２４とから構成されている。
【００２２】
フランジ２２は、軸部２１に比べ厚肉に形成されており、かつ、軸部２１側の基部には略Ｓ字状に屈曲した屈曲部２５が形成されている。このように、屈曲部２５を形成すると共に、フランジ２２を厚肉に形成したことで、フランジ２２の曲げ剛性が向上する。
【００２３】
また、内輪３１，３２は、高炭素鋼等の平板をプレス成形してなり、軸方向に対称に形成されている。
【００２４】
さらに、外輪３３は鍛造にて形成され、回転検出用のナックル固定タイプのアクティブセンサからなるセンサ６１が貫通して設けられている。なお、回転を検出される内輪３１には、パルサリング６２が焼き付けによって設けられている。
【００２５】
次に、軸受装置の組立てについて説明する。
【００２６】
まず、軸体２の外周面に車両インナ側から転がり軸受３を圧入する。次に、ナット４０を軸体２の締結部２４に螺合し、内輪３２に締結する。内輪３１，３２が、フランジ２２とナット４０に挟まれ、玉３６，３７に十分な予圧が付与されて、転がり軸受３が軸体２に固定される。
【００２７】
さらに、軸体２の車両アウタ側に、ブレーキディスクやタイヤのホイール等を嵌合して位置決めするための支持部材５を設ける。支持部材５は、プレス成形品であり、軸体２の内面に圧入する圧入部５１と、ホイール等を支持する支持部５２とを有している。支持部材５は、軸体２の軸部２１からフランジ２２の屈曲部２５に渡って内接した状態で、圧入部５１を軸部２１に圧入して固定する。そして、軸体２に固定した支持部材５の支持部５２にホイール等を嵌合して位置決めし、当該支持部材５にて支持したホイール等をボルト６０にてフランジ２２に固定する。
【００２８】
なお、軸体２と内輪３１，３２が、互いに軸方向や周方向にずれるのを防止するために、軸体２と内輪３１，３２の界面を粗面として滑り止めを施したり、内輪３１，３２を軸体２にスプライン嵌合したり、ローレット加工を施したりしてもよい。
【００２９】
同様に、軸体２と支持部材５が、互いに軸方向や周方向にずれるのを防止するために、軸体２と支持部材５の界面を粗面として滑り止めを施したり、支持部材５を軸体２にスプライン嵌合したり、ローレット加工を施したりしてもよい。
【００３０】
このように構成された軸受装置によると、軸体２が深絞りプレス成形品にて形成されており、塑性加工を中心とした加工により容易に製造でき、製造コストの低減を図ることができる。しかも、プレス成形品であるため、中空で余肉を削減でき、軽量化が図れる。
【００３１】
また、軸体２のフランジ２２を軸部２１より厚肉としたり、軸体２のフランジ２２の基部に断面略Ｓ字状に屈曲した屈曲部２５を形成することで、フランジ２２の曲げ剛性が向上する。
【００３２】
また、軸体２がプレス成形品にて形成されているので、同容量の低炭素鋼等の平板を用いて各種形状に深絞りプレスすることができ、容易に軸体２のみを変更して、取り合いの異なる車両に対応した軸受装置を提供できる。その結果、大量生産が可能となり、製造コストの低減を図ることができる。
【００３３】
また、支持部材５が、軸体２の軸部２１からフランジ２２の屈曲部２５に渡って内接した状態で軸部２１に圧入されているので、支持部材５にて軸部２１を補強できる。
【００３４】
さらに、軸体２ならびに支持部材５を、それぞれプレス成形にて別々に製造して圧入固定するので、従来のように鍛造にて一体成形するのに比べ、製造が容易に行え、かつ、より一層の軽量化が図れる。
【００３５】
なお、支持部材５は、図１に示した構造のものに限らない。例えば、図３に示すように、ハイドロフォーム工法により、支持部５２の端面を閉塞し、曲げに対する剛性を向上させたものであってもよい。
【００３６】
また、転がり軸受３は、図１に示した構造のものに限らない。例えば、鍛造にて形成された内外輪の間に転動体を介装した転がり軸受等であってもよい。また、複列の転がり軸受に限らず、単列の転がり軸受でもよく、転動体も玉に限らず円すいころであってもよい。
【００３７】
例えば、図４に示すように、内輪３１，３２が鍛造にて形成された転がり軸受３を、プレス成形品の軸体２の外周に装着したものであってもよい。なお、その他の構成は図１に示した軸受装置と同様であり、同一部分には同一符号を付してその説明を省略する。
（実施の形態２）
本発明の実施の形態２について、図５を用いて説明する。なお、図１に示した実施の形態１と同一部分は、同一符号を付してその説明を省略する。
【００３８】
この実施の形態２は、支持部材５の圧入部５１を車両インナ側に延ばし、当該延設部の外周面にナット４０を螺合するねじ溝を形成して締結部５３としたことを特徴とするものである。
【００３９】
また、支持部材５に締結部５３を形成したことにより、軸体２の車両インナ側には締結部を形成せず、軸部２１の車両インナ側端部は内輪３２の車両インナ側の端部より若干短く形成する。これにより、締結部５３にナット４０を螺合した際に、ナット４０が内輪３２の端部に締結され、玉３６，３７に十分な予圧が付与される。
【００４０】
このように構成された軸受装置によると、実施の形態１に記載の効果に加え、支持部材５を軸体２の軸部２１の内周面に沿って車両インナ側に延ばしたことにより、支持部材５にて軸体２の補強が行え、軸受強度が向上するという効果が得られる。
（実施の形態３）
本発明の実施の形態３について、図６を用いて説明する。なお、図１に示した実施の形態１と同一部分は、同一符号を付してその説明を省略する。
【００４１】
この実施の形態３は、軸体２のフランジ２２を厚肉とせず、フランジ２２の車両アウタ側面に補助部材２６を設けたことを特徴とするものである。
【００４２】
すなわち、補助部材２６は、低炭素鋼等の平板を薄肉に深絞りプレス成形してなる環状の部材であり、フランジ２２の車両アウタ側面に接するフランジ部２７と、支持部材５の外面に接するリブ２８とからなる。
【００４３】
そして、補助部材２６を支持部材５の外面に圧入し、軸体２のフランジ２２とフランジ部２７とで厚肉のフランジを構成し、ホイール等をボルト６０にて固定する。
【００４４】
このように構成された軸受装置においても、実施の形態１に記載の効果と同様の効果が得られる。
（実施の形態４）
本発明の実施の形態４について、図７を用いて説明する。なお、図１に示した実施の形態１と同一部分は、同一符号を付してその説明を省略する。
【００４５】
この実施の形態４は、ハブユニットからなる外輪回転の軸受装置であって、軸体２の車両インナ側に、ステアリングナックルを介して車体に固定するフランジ２２を有したことを特徴とするものである。
【００４６】
軸体２は、低炭素鋼等の平板を薄肉に深絞りプレス成形してなり、軸心方向に直線状に延びる軸部２１と、軸部２１の車両インナ側端部から径方向外向きに延びる厚肉のフランジ２２と、軸部２１の車両アウタ側に段部２３を介して形成され外周面にナット４０を螺合するねじ溝を有した締結部２４とから構成されている。
【００４７】
また、転がり軸受３は、鍛造製の内外輪３１，３２，３３と、内輪３１，３２と外輪３３の軌道３４，３５との間に介装され保持器３８にて保持された玉３６，３７と、両端を閉蓋したシール部材３９にて構成されている。
【００４８】
さらに、軸体２の軸部２１ならびに内輪３１，３２を貫通して回転検出用のセンサ６１が設けられており、かつ、回転を検出される外輪３３には、パルサリング６２が設けられている。なお、センサ６１は、ナックル固定タイプのアクティブセンサであり、軸体２に圧入したプレス品の取付板７０に取付けられている。また、パルサリング６２は、外輪３３の内周面に圧入してかしめ固定されている。また、フランジ２２の車両インナ側面には、ナックルを嵌合して位置決めする爪７１が数箇所に塑性加工にて形成されている。
【００４９】
このように構成された軸受装置によると、実施の形態１に記載の効果に加え、センサ６１が軸体２の内部に収納されているため、センサ６１が軸体２にて保護され、、センサ６１の破損や断線等を防止できる。さらに、センサ６１を固定する取付板７０は軽量のプレス品であり、かつ、取付板７０にて軸体２の開口端を閉蓋でき、軸体２内に異物等が侵入するのを防止でき、センサ６１の寿命が向上するという効果が得られる。
【００５０】
図８に、実施の形態４の軸受装置の変形例を示す。
【００５１】
この軸受装置は、センサ６１を取り付けるプレス品の取付板７２に、ナックルを嵌合して位置決めする爪７３を一体に形成したものであり、その他の構成は図７の例と同様であり、同一部分には同一符号を付してその説明を省略する。
【００５２】
なお、本発明は、上述の各実施の形態に示すように、ハブユニットからなる車軸用の軸受装置に限るものではなく、各種軸受装置に適用してもよい。
【００５３】
【発明の効果】
本発明の軸受装置によれば、製造性に優れ、軽量で安価であるという効果が得られる。
【図面の簡単な説明】
【図１】本発明の実施の形態１における軸受装置の断面図である。
【図２】本発明の実施の形態１における軸受装置の軸体の断面図である。
【図３】本発明の実施の形態１における軸受装置の支持部材の変形例の断面図である。
【図４】本発明の実施の形態１における軸受装置の変形例の断面図である。
【図５】本発明の実施の形態２における軸受装置の断面図である。
【図６】本発明の実施の形態３における軸受装置の断面図である。
【図７】本発明の実施の形態４における軸受装置の断面図である。
【図８】本発明の実施の形態４における軸受装置の変形例の断面図である。
【符号の説明】
１ ハブホイール
２ 軸体
２１ 軸部
２２ フランジ
２４，５３ 締結部
２５ 屈曲部
３ 転がり軸受
３１，３２ 内輪
３３ 外輪
３４，３５ 外輪軌道
３６，３７ 玉（転動体）
４０ ナット
５ 支持部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bearing device in which a rolling bearing is mounted on the outer periphery of a shaft body such as a vehicle hub unit.
[0002]
[Prior art]
A hub unit for a vehicle generally has a structure in which a double-row rolling bearing is mounted on the outer periphery of a shaft body of a hub wheel so as to prevent the hub wheel from coming off.
[0003]
For example, in the case of inner ring rotation, the rolling bearing includes an inner ring mounted on the outer periphery of the shaft body, an outer ring fixed to the vehicle body via a steering knuckle, a double row rolling element disposed between the inner ring and the outer ring, and holding the rolling element. And a sealing member with a closed end.
[0004]
[Problems to be solved by the invention]
Conventionally, a shaft body to which a rolling bearing is attached is formed by forging using a high-strength material that can withstand the load of the bearing.
[0005]
However, in the case of forging, there is a possibility that processing takes time and costs are increased, and the weight is also increased.
[0006]
An object of the present invention is to provide a lightweight and inexpensive bearing device that is excellent in manufacturability.
[0007]
[Means for Solving the Problems]
A bearing device according to the present invention includes a shaft body, an inner ring mounted on the outer peripheral surface of the shaft body, an outer ring disposed concentrically on the outer periphery of the inner ring, and interposed between the inner ring and the outer ring. A rolling element, and the shaft body is formed of a deep drawing press-molded product, and includes a shaft portion extending linearly in the axial direction and a flange extending radially outward from an end portion of the shaft portion. And, on the flange side of the shaft body, a support member formed of a deep-drawing press-molded product that supports a brake disk, a wheel, etc. is press-fitted inwardly across the flange from the shaft portion, wherein the outer peripheral surface in the counter-flange side of the support member to form a fastening section having a thread groove, by fastening the nuts to the fastening part in the axial end face of the screwed inner ring, and applying a preload to the rolling elements The inner ring is fixed to a shaft body.
[0008]
Note that the shaft body flange may be thicker than the shaft portion, or a bent portion that is bent in a substantially S-shaped cross section may be formed at the base portion of the shaft body flange.
[0009]
In addition, a fastening portion having a thread groove on the outer peripheral surface is formed on the opposite side of the shaft body, and a nut is screwed onto the fastening portion and fastened to the end surface in the axial direction of the inner ring. The inner ring may be fixed to the shaft body.
[0010]
According to the bearing device of the present invention, the shaft body is formed of a deep drawing press-molded product, which can be easily manufactured by processing centering on plastic processing, and the manufacturing cost can be reduced. In addition, since it is a press-molded product, it is hollow and can reduce the surplus thickness and can be reduced in weight.
[0011]
Moreover, the bending rigidity of a flange improves by making the flange of a shaft body thicker than a shaft part, or forming the bending part bent in the substantially S-shaped cross section in the base part of the flange of a shaft body.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1)
Embodiment 1 of the present invention will be described with reference to FIGS.
[0016]
FIG. 1 shows a cross-sectional view of a bearing device for rotating an inner ring comprising a hub unit on the side of a vehicle driven wheel in the first embodiment.
[0017]
In FIG. 1, reference numeral 1 denotes a hub wheel to which a wheel is attached, and a double row rolling bearing 3 is fitted on the outer peripheral surface of an annular shaft body 2 of the hub wheel 1 by press-fitting from the vehicle inner side. .
[0018]
The double-row rolling bearing 3 is composed of an inner ring rotating angular ball bearing. Balls 36 and 37 serving as double-row rolling elements arranged along the raceways 31 and 32 and the outer ring raceways 34 and 35, a cage 38 holding the balls 36 and 37 in each row, and a vehicle outer side end closed. The sealing member 39 is used.
[0019]
The rolling bearing 3 is press-fitted into the outer peripheral surface of the shaft body 2 from the vehicle inner side, and then a nut 40 is screwed into the shaft body 2 to be fastened to the axial end surface of the inner ring 32 on the vehicle inner side, and further from the vehicle inner side. Cover the cover 41. In this way, a sufficient preload is applied to the balls 36 and 37 to fix the rolling bearing 3 to the shaft body 2.
[0020]
Next, the configuration of each part of the bearing device will be described in detail.
[0021]
First, the shaft body 2 is formed by deep drawing press forming a flat plate of low carbon steel or the like into a thin wall. As shown in FIG. 2, the shaft body 2 includes a shaft portion 21 that extends linearly in the axial direction, a flange 22 that extends radially outward from a vehicle outer side end portion of the shaft portion 21, and a vehicle having the shaft portion 21. The fastening portion 24 is formed on the inner side through a step portion 23 and has a thread groove in which a nut 40 is screwed onto the outer peripheral surface.
[0022]
The flange 22 is formed thicker than the shaft portion 21, and a bent portion 25 bent in a substantially S shape is formed at the base portion on the shaft portion 21 side. Thus, the bending rigidity of the flange 22 is improved by forming the bent portion 25 and forming the flange 22 thick.
[0023]
The inner rings 31 and 32 are formed by press-molding a flat plate made of high carbon steel or the like, and are formed symmetrically in the axial direction.
[0024]
Further, the outer ring 33 is formed by forging, and a sensor 61 made of a knuckle-fixing type active sensor for detecting rotation is provided therethrough. A pulsar ring 62 is provided on the inner ring 31 whose rotation is detected by baking.
[0025]
Next, assembly of the bearing device will be described.
[0026]
First, the rolling bearing 3 is press-fitted into the outer peripheral surface of the shaft body 2 from the vehicle inner side. Next, the nut 40 is screwed into the fastening portion 24 of the shaft body 2 and fastened to the inner ring 32. The inner rings 31 and 32 are sandwiched between the flange 22 and the nut 40, and sufficient preload is applied to the balls 36 and 37, so that the rolling bearing 3 is fixed to the shaft body 2.
[0027]
Further, a support member 5 for fitting and positioning a brake disk, a tire wheel, or the like is provided on the vehicle outer side of the shaft body 2. The support member 5 is a press-molded product, and includes a press-fit portion 51 that is press-fitted into the inner surface of the shaft body 2 and a support portion 52 that supports a wheel or the like. The support member 5 press-fits the press-fit portion 51 into the shaft portion 21 and is fixed in a state where it is inscribed from the shaft portion 21 of the shaft body 2 to the bent portion 25 of the flange 22. Then, a wheel or the like is fitted and positioned on the support portion 52 of the support member 5 fixed to the shaft body 2, and the wheel or the like supported by the support member 5 is fixed to the flange 22 by the bolt 60.
[0028]
In order to prevent the shaft body 2 and the inner rings 31 and 32 from shifting in the axial direction or the circumferential direction, the interface between the shaft body 2 and the inner rings 31 and 32 is roughened to prevent slipping, 32 may be spline-fitted to the shaft body 2 or knurled.
[0029]
Similarly, in order to prevent the shaft body 2 and the support member 5 from deviating from each other in the axial direction or the circumferential direction, the interface between the shaft body 2 and the support member 5 is roughened to prevent slipping, or the support member 5 is The shaft body 2 may be spline-fitted or knurled.
[0030]
According to the bearing device configured as described above, the shaft body 2 is formed of a deep drawing press-molded product, which can be easily manufactured by processing centering on plastic processing, and the manufacturing cost can be reduced. In addition, since it is a press-molded product, it is hollow and can reduce the surplus thickness and can be reduced in weight.
[0031]
Further, the flange 22 of the shaft body 2 is thicker than the shaft portion 21, or the bent portion 25 bent in a substantially S-shaped cross section is formed at the base of the flange 22 of the shaft body 2, so that the bending rigidity of the flange 22 is increased. improves.
[0032]
Moreover, since the shaft body 2 is formed of a press-molded product, it can be deep-drawn into various shapes using a flat plate of the same capacity, such as low carbon steel, and only the shaft body 2 can be easily changed. Thus, it is possible to provide a bearing device corresponding to a vehicle having a different relationship. As a result, mass production becomes possible, and the manufacturing cost can be reduced.
[0033]
Further, since the support member 5 is press-fitted into the shaft portion 21 while being inscribed from the shaft portion 21 of the shaft body 2 to the bent portion 25 of the flange 22, the shaft portion 21 can be reinforced by the support member 5. .
[0034]
Further, since the shaft body 2 and the support member 5 are separately manufactured by press molding and press-fitted and fixed, the manufacturing can be performed more easily and compared to the case of integrally forming by forging as in the past. Can be reduced in weight.
[0035]
The support member 5 is not limited to the structure shown in FIG. For example, as shown in FIG. 3, the end face of the support portion 52 may be closed by a hydroforming method to improve the rigidity against bending.
[0036]
Further, the rolling bearing 3 is not limited to the structure shown in FIG. For example, a rolling bearing having a rolling element interposed between inner and outer rings formed by forging may be used. Moreover, not only a double row rolling bearing but a single row rolling bearing may be sufficient, and a rolling element may be not only a ball but a tapered roller.
[0037]
For example, as shown in FIG. 4, a rolling bearing 3 in which inner rings 31 and 32 are formed by forging may be mounted on the outer periphery of a shaft body 2 of a press-formed product. Other configurations are the same as those of the bearing device shown in FIG. 1, and the same portions are denoted by the same reference numerals and the description thereof is omitted.
(Embodiment 2)
A second embodiment of the present invention will be described with reference to FIG. In addition, the same part as Embodiment 1 shown in FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description.
[0038]
The second embodiment is characterized in that the press-fit portion 51 of the support member 5 is extended to the vehicle inner side, and a screw groove for screwing the nut 40 is formed on the outer peripheral surface of the extended portion to form the fastening portion 53. To do.
[0039]
Further, since the fastening portion 53 is formed on the support member 5, no fastening portion is formed on the vehicle inner side of the shaft body 2, and the vehicle inner side end portion of the shaft portion 21 is the end portion of the inner ring 32 on the vehicle inner side. Form slightly shorter. Thereby, when the nut 40 is screwed into the fastening portion 53, the nut 40 is fastened to the end portion of the inner ring 32, and sufficient preload is applied to the balls 36 and 37.
[0040]
According to the bearing device configured as described above, in addition to the effects described in the first embodiment, the support member 5 is extended to the vehicle inner side along the inner peripheral surface of the shaft portion 21 of the shaft body 2. The shaft body 2 can be reinforced by the member 5, and the effect that the bearing strength is improved is obtained.
(Embodiment 3)
A third embodiment of the present invention will be described with reference to FIG. In addition, the same part as Embodiment 1 shown in FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description.
[0041]
The third embodiment is characterized in that the auxiliary member 26 is provided on the vehicle outer side surface of the flange 22 without making the flange 22 of the shaft body 2 thick.
[0042]
That is, the auxiliary member 26 is an annular member formed by thinly drawing a flat plate of low carbon steel or the like into a thin wall, and includes a flange portion 27 in contact with the vehicle outer side surface of the flange 22 and a rib in contact with the outer surface of the support member 5. 28.
[0043]
Then, the auxiliary member 26 is press-fitted into the outer surface of the support member 5, the flange 22 and the flange portion 27 of the shaft body 2 constitute a thick flange, and the wheel or the like is fixed with the bolt 60.
[0044]
Also in the bearing device configured as described above, the same effects as those described in the first embodiment can be obtained.
(Embodiment 4)
Embodiment 4 of the present invention will be described with reference to FIG. In addition, the same part as Embodiment 1 shown in FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description.
[0045]
The fourth embodiment is a bearing device for rotating an outer ring comprising a hub unit, and is characterized by having a flange 22 fixed to the vehicle body via a steering knuckle on the vehicle inner side of the shaft body 2. is there.
[0046]
The shaft body 2 is formed by deep drawing press forming a thin plate of low carbon steel or the like into a thin wall, and a shaft portion 21 extending linearly in the axial direction and a radially inner side end portion of the shaft portion 21 from the vehicle inner side. A thick flange 22 that extends, and a fastening portion 24 that is formed on the vehicle outer side of the shaft portion 21 via a step portion 23 and has a thread groove into which the nut 40 is screwed on the outer peripheral surface.
[0047]
Further, the rolling bearing 3 includes balls 36 and 37 that are interposed between forged inner and outer rings 31, 32, and 33 and between the inner rings 31 and 32 and the raceways 34 and 35 of the outer ring 33 and are held by a cage 38. And a seal member 39 with both ends closed.
[0048]
Further, a rotation detection sensor 61 is provided through the shaft portion 21 and the inner rings 31 and 32 of the shaft body 2, and a pulsar ring 62 is provided on the outer ring 33 whose rotation is detected. The sensor 61 is a knuckle-fixed type active sensor, and is attached to a press attachment plate 70 press-fitted into the shaft body 2. The pulsar ring 62 is press-fitted into the inner peripheral surface of the outer ring 33 and fixed by caulking. Further, on the vehicle inner side surface of the flange 22, claws 71 for fitting and positioning the knuckle are formed at several locations by plastic working.
[0049]
According to the bearing device configured as described above, in addition to the effects described in the first embodiment, since the sensor 61 is housed in the shaft body 2, the sensor 61 is protected by the shaft body 2, 61 can be prevented from being broken or disconnected. Furthermore, the mounting plate 70 for fixing the sensor 61 is a lightweight press product, and the mounting plate 70 can close the opening end of the shaft body 2, thereby preventing foreign matter and the like from entering the shaft body 2. The effect that the lifetime of the sensor 61 is improved is obtained.
[0050]
FIG. 8 shows a modification of the bearing device according to the fourth embodiment.
[0051]
In this bearing device, a claw 73 for fitting and positioning a knuckle is integrally formed on an attachment plate 72 of a press product to which the sensor 61 is attached, and the other configuration is the same as the example of FIG. Parts are denoted by the same reference numerals, and description thereof is omitted.
[0052]
Note that the present invention is not limited to the axle bearing device including the hub unit as shown in the above-described embodiments, and may be applied to various bearing devices.
[0053]
【The invention's effect】
According to the bearing device of the present invention, it is possible to obtain the effects of excellent manufacturability, light weight and low cost.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a bearing device according to a first embodiment of the present invention.
FIG. 2 is a sectional view of a shaft body of the bearing device according to the first embodiment of the present invention.
FIG. 3 is a cross-sectional view of a modified example of the support member of the bearing device according to the first embodiment of the present invention.
FIG. 4 is a cross-sectional view of a modified example of the bearing device according to the first embodiment of the present invention.
FIG. 5 is a sectional view of a bearing device according to a second embodiment of the present invention.
FIG. 6 is a sectional view of a bearing device according to a third embodiment of the present invention.
FIG. 7 is a sectional view of a bearing device according to a fourth embodiment of the present invention.
FIG. 8 is a cross-sectional view of a modified example of the bearing device according to the fourth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hub wheel 2 Shaft body 21 Shaft part 22 Flange 24, 53 Fastening part 25 Bending part 3 Rolling bearing 31, 32 Inner ring 33 Outer ring 34, 35 Outer ring track 36, 37 Ball (rolling element)
40 Nut 5 Support member

Claims (1)

軸体と、前記軸体の外周面に装着した内輪と、前記内輪の外周に同心状に回転可能に配置した外輪と、前記内輪と前記外輪の間に介装した転動体とを備え、前記軸体が、深絞りプレス成形品にて形成されており、軸心方向に直線状に延びる軸部と、軸部の端部から径方向外向きに延びるフランジとからなり、前記軸体のフランジ側に、ブレーキディスクやホイール等を支持する深絞りプレス成形品にて形成された支持部材を、前記軸部から前記フランジに渡って内接させて圧入しており、
前記支持部材の反フランジ側に外周面にねじ溝を有した締結部を形成し、前記締結部にナットを螺合し内輪の軸方向端面に締結することにより、転動体に予圧を付与して前記内輪を軸体に固定したことを特徴とする軸受装置。 A shaft body, an inner ring attached to the outer peripheral surface of the shaft body, an outer ring disposed concentrically on the outer periphery of the inner ring, and a rolling element interposed between the inner ring and the outer ring, The shaft body is formed of a deep drawing press-molded product, and includes a shaft portion extending linearly in the axial direction and a flange extending radially outward from the end portion of the shaft portion, and the flange of the shaft body On the side, a support member formed of a deep-drawing press-molded product that supports a brake disk, a wheel, etc. is press-fitted while being inscribed across the flange from the shaft portion,
Wherein the outer peripheral surface in the counter-flange side of the support member to form a fastening section having a thread groove, by fastening the nuts to the fastening part in the axial end face of the screwed inner ring, and applying a preload to the rolling elements Bearing device characterized in that fixed to the inner ring to the shaft member.
JP2001359383A 2001-11-26 2001-11-26 Bearing device Expired - Fee Related JP4003446B2 (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
JP2001359383A JP4003446B2 (en) 2001-11-26 2001-11-26 Bearing device

Related Child Applications (1)

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Cited By (1)

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EP1745972B1 (en) 2004-01-29 2010-12-22 Yanmar Co. Ltd. Tractor
JP4352927B2 (en) 2004-02-20 2009-10-28 日本精工株式会社 Method for manufacturing race ring member constituting hub unit for supporting wheel
JP4986116B2 (en) * 2006-06-13 2012-07-25 Ｎｔｎ株式会社 Wheel bearing device
JP5052847B2 (en) * 2006-09-07 2012-10-17 Ｎｔｎ株式会社 Wheel bearing device
DE112007002599T5 (en) 2006-11-07 2010-01-14 Ntn Corp. Wheel bearing device for a vehicle
JP4205752B2 (en) * 2006-11-07 2009-01-07 Ｎｔｎ株式会社 Wheel bearing device
JP5641705B2 (en) * 2009-04-02 2014-12-17 Ntn株式会社 Wheel bearing device
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WO2012011297A1 (en) * 2010-07-22 2012-01-26 日本精工株式会社 Rolling bearing unit with encoder for supporting drive wheel
CN102481806A (en) * 2010-07-22 2012-05-30 日本精工株式会社 Rolling bearing unit with encoder for supporting drive wheel
US8882358B2 (en) 2010-07-22 2014-11-11 Nsk Ltd. Rolling bearing unit with encoder for supporting wheel
US9091303B2 (en) 2010-07-22 2015-07-28 Nsk Ltd. Rolling bearing unit with encoder for supporting wheel
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