JP4696397B2 - Wheel bearing unit and manufacturing method thereof - Google Patents

Wheel bearing unit and manufacturing method thereof Download PDF

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Publication number
JP4696397B2
JP4696397B2 JP2001158952A JP2001158952A JP4696397B2 JP 4696397 B2 JP4696397 B2 JP 4696397B2 JP 2001158952 A JP2001158952 A JP 2001158952A JP 2001158952 A JP2001158952 A JP 2001158952A JP 4696397 B2 JP4696397 B2 JP 4696397B2
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stud
outer ring
bearing unit
peripheral surface
flange
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JP2002347402A5 (en
JP2002347402A (en
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英男 大内
潤是 坂本
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NSK Ltd
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NSK Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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
    • F16C33/581—Raceways; Race rings integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels
    • 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
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Mounting Of Bearings Or Others (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、自動車の車輪並びにロータ或はドラム等の制動用回転体を支持する為の車輪用軸受ユニット、及び、この様な車輪用軸受ユニットの製造方法の改良に関する。
【０００２】
【従来の技術】
自動車の車輪を構成するホイール１及び制動装置であるディスクブレーキを構成するロータ２は、例えば図８に示す様な構造により、懸架装置を構成するナックル３に回転自在に支承している。即ち、このナックル３に形成した円形の支持孔４部分に、本発明の対象となる車輪用軸受ユニット５を構成する外輪６を、複数本のボルト７により固定している。一方、上記車輪用軸受ユニット５を構成するハブ８に上記ホイール１及びロータ２を、複数本のスタッド９とナット１０とにより結合固定している。
【０００３】
上記外輪６の内周面には複列の外輪軌道１１ａ、１１ｂを、外周面には固定側フランジ１２を、それぞれ形成している。この様な外輪６は、この固定側フランジ１２を上記ナックル３に、上記各ボルト７で結合する事により、このナックル３に対し固定している。
【０００４】
これに対して、上記ハブ８の外周面の一部で、上記外輪６の外端開口（軸方向に関して外とは、自動車への組み付け状態で幅方向外側となる部分を言い、図１、４、８の左側。反対に、自動車への組み付け状態で幅方向中央側となる、図１、４、８の右側を、軸方向に関する内と言う。）から突出した部分には、回転側フランジ１３を形成している。上記ホイール１及びロータ２はこの回転側フランジ１３の片側面（図示の例では外側面）に、上記各スタッド９とナット１０とにより、結合固定している。このうちのスタッド９の基端部外周面には、雄セレーション部３４を形成しており、この雄セレーション部３４を上記回転側フランジ１３に設けた取付孔２４に軸方向内側から軸方向外側に圧入する事により、上記各スタッド９をこの回転側フランジ１３に結合固定している。又、上記ハブ８の中間部外周面で、上記複列の外輪軌道１１ａ、１１ｂのうちの外側の外輪軌道１１ａに対向する部分には、内輪軌道１４ａを形成している。更に、上記ハブ８の内端部外周面に形成した小径段部１５に、上記ハブ８と共に回転部材２３を構成する、内輪１６を外嵌固定している。そして、この内輪１６の外周面に形成した内輪軌道１４ｂを、上記複列の外輪軌道１１ａ、１１ｂのうちの内側の外輪軌道１１ｂに対向させている。
【０００５】
これら各外輪軌道１１ａ、１１ｂと各内輪軌道１４ａ、１４ｂとの間には、それぞれが転動体である玉１７、１７を複数個ずつ、それぞれ保持器１８、１８により保持した状態で転動自在に設けている。この構成により、背面組み合わせである複列アンギュラ型の玉軸受を構成し、上記外輪６の内側に上記回転部材２３を、回転自在に、且つ、ラジアル荷重及びスラスト荷重を支承自在に支持している。尚、上記外輪６の両端部内周面と、上記ハブ８の中間部外周面及び上記内輪１６の内端部外周面との間には、それぞれシールリング１９ａ、１９ｂを設けて、上記各玉１７、１７を設けた内部空間と外部とを遮断している。更に、図示の例は、駆動輪（ＦＲ車及びＲＲ車の後輪、ＦＦ車の前輪、４ＷＤ車の全輪）用の車輪用軸受ユニット５である為、上記ハブ８の中心部に、スプライン孔２０を形成している。そして、このスプライン孔２０に、等速ジョイント２１のスプライン軸２２を挿入している。
【０００６】
上述の様な車輪用転がり軸受ユニット５の使用時には、図８に示す様に、外輪６をナックル３に固定すると共に、ハブ８の回転側フランジ１３に、図示しないタイヤを組み合わせたホイール１及び制動用回転体であるロータ２を固定する。又、このうちのロータ２と、上記ナックル３に固定した、図示しないサポート及びキャリパとを組み合わせて、制動用のディスクブレーキを構成する。制動時には、上記ロータ２を挟んで設けた１対のパッドを、このロータ２の制動用摩擦面である両側面に押し付ける。尚、本明細書中で制動用摩擦面とは、制動用回転体がロータである場合には、このロータの軸方向両側面を言い、制動用回転体がドラムブレーキを構成するドラムである場合には、このドラムの内周面を言う。
【０００７】
一方、自動車の制動時にしばしば、ジャダーと呼ばれる、不快な騒音を伴う振動が発生する事が知られている。この様な振動の原因としては、ロータ２の側面とパッドのライニングとの摩擦状態の不均一等、各種の原因が知られているが、上記ロータ２の振れも、大きな原因となる事が知られている。即ち、このロータ２の側面はこのロータ２の回転中心に対して、本来直角となるべきものであるが、不可避な製造誤差等により、完全に直角にする事は難しい。この結果、自動車の走行時に上記ロータ２の側面は、多少とは言え、回転軸方向（図８の左右方向）に振れる事が避けられない。この様な振れ（図８の左右方向への変位量）が大きくなると、制動の為に１対のパッドのライニングを上記ロータ２の両側面に押し付けた場合に、上記ジャダーが発生する。又、上記回転側フランジ１３の側面にドラムブレーキを構成するドラムを固定した場合には、このドラムの内周面がドラムの回転中心に対して完全に平行でなければ、シューをこのドラムの内周面に押し付けた場合に、やはりジャダーの如き振動が発生する。
【０００８】
この様な原因で発生するジャダーを抑える為には、上記ロータ２の側面の軸方向の振れ（アキシアル振れ）、又は上記ドラムの内周面の径方向の振れを抑える（向上させる）事が重要となる。そして、この振れを抑える為には、上記ハブ８の回転中心に対する回転側フランジ１３の取付面（上記回転側フランジ１３の片側面）の直角度を向上させる事が重要となる。米国特許明細書第６，０７１，１８０号には、この回転側フランジ１３の取付面の直角度を向上させる為の車輪用軸受ユニットの製造方法が記載されている。この明細書に記載された車輪用軸受ユニットの製造方法の場合、ハブの外周面に設けた回転側フランジの片側面を所定の形状及び寸法に加工する際に、先ず、この片側面を加工する前のハブを含む、車輪用軸受ユニットの各構成部材を組み立てる。次いで、外輪の外周面に設けた固定側フランジを加工装置の一部に固定してから、スピンドルにより上記ハブを回転させつつ、このハブの外周面に設けた回転側フランジの片側面に研削加工工具を突き当てて、この片側面を所定の形状及び寸法に仕上げる。この様な方法により車輪用軸受ユニットを製造した場合には、各構成部材の製造上不可避な寸法誤差や組み付け誤差に拘らず、上記ハブの回転中心に対する回転側フランジの片側面の直角度を向上させる事ができて、この片側面に固定するロータ等の回転制動体の振れを抑える事ができる。
【０００９】
【発明が解決しようとする課題】
上述した米国特許明細書第６，０７１，１８０号に記載された車輪用軸受ユニットの製造方法の場合、上記回転側フランジの片側面にホイール及びロータを固定する為の構造に就いて、特に考えられていない。但し、実際の車輪用軸受ユニットの使用時には、上記回転側フランジの片側面に上記ホイール及びロータを固定すべく、前述の図８に示した従来構造の場合と同様に、回転側フランジ１３の円周方向複数個所にスタッド９、９の基端部を結合等する必要がある。そして、これら複数のスタッド９、９と、これら各スタッド９、９の先端寄り部分に結合した複数のナット１０、１０とにより、上記回転側フランジ１３の片側面にホイール１及びロータ２を固定する。
【００１０】
但し、上記米国特許明細書に記載された車輪用軸受ユニットの製造方法の様に、車輪用軸受ユニットの各構成部材を組み立てた後、回転側フランジの片側面を研削加工等により所定の形状及び寸法に仕上げる場合、この回転側フランジに各スタッドを結合する作業が相当面倒になる可能性がある。即ち、従来構造の場合には、車輪用軸受ユニットの各構成部材を組み立てた後に、回転側フランジに各スタッドを結合する事は考えられていなかった。この為、従来構造の場合には、一般的に、上記回転側フランジに設けた取付孔にスタッドを固定した状態で、このスタッドの頭部の外周面を軸方向内側に延長して成る仮想円筒面と、固定側フランジ等、外輪の一部とが干渉している。特に、車輪用軸受ユニットの寸法を特に大きくする事なく、しかも、外輪の径方向の厚さを十分に確保した構造では、上記仮想円筒面と外輪の一部とが干渉し易い。そして、この場合には上記各スタッドを、上記各取付孔の軸方向内端側からこれら各取付孔の内側に、これら各取付孔の軸方向に挿入する事ができなくなる。この為、上記回転側フランジに対する各スタッドの結合作業が相当面倒になるだけでなく、上記回転側フランジに対する各スタッドの結合作業を、自動組立装置等により自動化する事が難しくなる。そして、車輪用軸受ユニットの製造作業に要するコストが嵩む原因となる。
【００１１】
これに対して、上記回転側フランジに上記各スタッドの基端部を固定した後、この回転側フランジを含む車輪用軸受ユニットの各構成部材を組み立ててから、上記回転側フランジの片側面に仕上げ加工を施す事も考えられる。但し、この場合には、上記各スタッドの一部で、上記回転側フランジの片側面から突出した部分を避けつつ、この回転側フランジの片側面に仕上げ加工を施す必要がある。この様な仕上げ加工は相当面倒である為、やはり車輪用軸受ユニットの製造作業に要するコストが嵩む原因となる。
本発明の車輪用軸受ユニットとその製造方法は、この様な事情に鑑みて発明したものである。
【００１２】
【課題を解決するための手段】
本発明の車輪用軸受ユニットとその製造方法のうち、請求項１に記載した車輪用軸受ユニットは、前述した従来の車輪用軸受ユニットと同様に、外周面に車体に固定する為の固定側フランジを、内周面に外輪軌道を、それぞれ有し、使用時にも回転しない外輪と、外周面に内輪軌道を有し、使用時に回転する回転部材と、この内輪軌道と上記外輪軌道との間に設けられた複数個の転動体と、上記回転部材の外端部外周面に設けられて、使用状態でその側面に制動用回転体及び車輪を結合固定する回転側フランジとを備える。
【００１３】
特に、請求項１に記載した車輪用軸受ユニットに於いては、上記回転側フランジの一部に形成された取付孔と、この取付孔に挿入された状態で上記回転側フランジに結合固定されたスタッドと、上記外輪とスタッドとのうちの少なくとも一方の外周面の一部に形成された切り欠きとを備える。そして、上記スタッドは、上記外輪と回転部材と複数の転動体とを組み立てた後、上記回転側フランジの側面を所定の形状及び寸法に加工してから、上記切り欠きを上記スタッド又は外輪の外周面に整合させつつ、上記取付孔の軸方向内端側からこの取付孔に挿入して、上記回転側フランジに結合固定したものである。
【００１４】
更に、請求項２に記載した車輪用軸受ユニットの製造方法は、請求項１に記載した車輪用軸受ユニットの製造方法であって、上記外輪と回転部材と複数の転動体とを組み立てた後、上記回転部材を上記外輪に対し回転させつつ、制動用回転体及び車輪を結合固定する為の回転側フランジの側面を所定の形状及び寸法に加工してから、上記切り欠きを上記スタッド又は外輪の外周面に整合させつつ、上記スタッドを上記取付孔の軸方向内端側からこの取付孔に挿入して、上記スタッドを上記回転側フランジに結合固定する。
【００１５】
【作用】
上述の様に構成する本発明の車輪用軸受ユニットとその製造方法の場合、外輪と回転部材と複数の転動体とを組み立てた後に、上記回転部材の外周面に設けた、制動用回転体及び車輪を結合固定する為の回転側フランジの側面を所定の形状及び寸法に加工する。この為、各構成部材の製造上不可避な寸法誤差や組み付け誤差に拘らず、上記回転部材の回転中心に対する、上記回転側フランジの側面の直角度を高くして、この回転側フランジに固定した制動用回転体の振れを抑える事ができる。しかも、本発明の場合には、上記回転側フランジの側面を所定の形状及び寸法に加工した後に、この回転側フランジにスタッドを結合固定する為、この回転側フランジの側面の加工作業を容易に行なえる。又、この回転側フランジに上記スタッドを結合固定する際に、このスタッドを上記取付孔に、この取付孔の軸方向に挿入できる。この為、上記回転側フランジに対する上記スタッドの結合作業を容易に行なえて、車輪用軸受ユニットの製造作業に要するコストを低減できる。又、本発明によれば、上記回転側フランジに対する上記スタッドの結合作業を、自動組立装置等により自動化できて、車輪用軸受ユニットの製造作業に要するコストを、より低減できる。しかも、本発明の場合には、上記外輪とスタッドとのうちの少なくとも一方の外周面の一部に切り欠きを形成すると共に、上記取付孔に上記スタッドを挿入する際に、上記切り欠きを上記スタッド又は外輪の外周面に整合させる為、車輪用軸受ユニットの寸法が特に大きくなる事をなくして、しかも、上記外輪の径方向の厚さを十分に確保できる。
【００１６】
【発明の実施の形態】
図１〜３は、本発明の実施の形態の第１例を示している。本例の製造方法により造る車輪用軸受ユニット５ａは、外輪６の中間部外周面に、この外輪６をナックル３（図８）に結合固定する為の固定側フランジ１２を設けている。又、上記外輪６の内周面には、複列の外輪軌道１１ａ、１１ｂを形成している。そして、上記外輪６の中間部外周面で、上記固定側フランジ１２の内側面よりも軸方向内側に外れた部分に、上記ナックル３に設けた支持孔４（図８）に内嵌する為の円筒面部３２を形成している。
【００１７】
又、回転部材２３ａを構成するハブ８ａ及び内輪１６の外周面で、上記各外輪軌道１１ａ、１１ｂに対向する部分に内輪軌道１４ａ、１４ｂを、それぞれ設けている。即ち、上記ハブ８ａの中間部外周面に直接内輪軌道１４ａを形成すると共に、このハブ８ａの内端寄り部分に形成した小径段部１５に、その外周面に内輪軌道１４ｂを形成した内輪１６を外嵌している。そして、この内輪１６が上記小径段部１５から抜け出るのを防止する為に、上記ハブ８ａの内端部にかしめ部２５を形成している。即ち、上記小径段部１５に上記内輪１６を外嵌した後、上記ハブ８ａの内端部でこの内輪１６の内端面から突出した部分を径方向外方に塑性変形させて上記かしめ部２５を形成し、このかしめ部２５により上記内輪１６の内端面を抑え付けている。この構成により、この内輪１６は、上記ハブ８ａの内端部に外嵌固定される。
【００１８】
又、このハブ８ａの外周面の外端寄り部分で、上記外輪６の外端開口から突出した部分には、車輪を構成するホイール１及び制動用回転体であるロータ２（図８）或はドラムを固定する為の回転側フランジ１３を設けている。この回転側フランジ１３の円周方向複数個所で、上記ハブ８ａの回転中心をその中心とする同一円周上には、それぞれ取付孔２４を形成し、これら各取付孔２４の内側に複数のスタッド２６の基端部を、それぞれ圧入固定している。
【００１９】
又、上記各外輪軌道１１ａ、１１ｂと内輪軌道１４ａ、１４ｂとの間には、それぞれが転動体である複数個の玉１７、１７を、それぞれ保持器１８、１８により保持した状態で、転動自在に設けている。尚、上記外輪６の両端部内周面と、上記ハブ８ａの中間部外周面及び上記内輪１６の内端部外周面との間には、１対のシールリング１９ａ、１９ｂを設けて、上記各玉１７、１７を設けた内部空間２７と外部とを遮断し、この内部空間２７内に封入したグリースの漏洩防止と、この内部空間２７内への異物の進入防止とを図っている。
【００２０】
更に、本例の場合には、上記１対のシールリング１９ａ、１９ｂのうちの内側のシールリング１９ｂを構成し、前記内輪１６の内端部に外嵌固定した芯金２８の側面に、エンコーダ２９を固定している。このエンコーダ２９は、円周方向に亙ってＳ極とＮ極とを交互に配置したゴム磁石製である。即ち、このエンコーダ２９は、ゴム中にフェライト粉末を混入したゴム磁石を円輪状に形成したもので、軸方向に着磁している。着磁方向は、円周方向に亙って交互に且つ等間隔で変化させている。従って、このエンコーダ２９の内側面には、Ｓ極とＮ極とが、円周方向に亙って交互に且つ等間隔で配置されている。車輪用軸受ユニット５ａの使用時には、上記エンコーダ２９の内側面に、懸架装置の一部等、固定の部分に支持した図示しないセンサの検出部を、微小隙間を介して対向させる。そして、上記エンコーダ２９の回転速度に応じて変化する、上記センサの出力信号を取り出し自在とする。この様なエンコーダ２９とセンサとは、前記ハブ８ａに固定した車輪の回転速度を検出する為の回転速度検出装置を構成する。
【００２１】
特に、本発明の場合には、前記外輪６の外周面に設けた固定側フランジ１２及び前記円筒面部３２の円周方向一部で、自動車に組み付けた状態で自動車の前後方向に関して一端部（図２の右端部）となる位置に断面円弧形の切り欠き３０を、上記固定側フランジ１２から円筒面部３２まで連続させる状態で、軸方向（図１の左右方向、図２、３の裏表方向）に形成している。そして、本発明の場合には、上記切り欠き３０と上記各取付孔２４、２４との位置を、次述する所定の関係に規制している。先ず、車輪用軸受ユニット５ａの各構成部材を組み立てた状態で、上記ハブ８ａの回転側フランジ１３に設けた複数の取付孔２４、２４のうち、１個の取付孔２４と、上記切り欠き３０との回転方向に関する位相を一致させた状態を仮定する。そして、上記１個の取付孔２４に挿入すべき上記スタッド２６を、上記回転側フランジ１３よりも軸方向内側に、上記取付孔２４と同心に配置した状態を仮定する。そして、この状態で、上記スタッド２６とこのスタッド２６を取り付けるべき車輪用軸受ユニット５ａとを軸方向内側から見た場合に、上記スタッド２６の頭部３１と上記外輪６とが、互いに重畳しない様にしている。
【００２２】
本例の車輪用軸受ユニットを製造する場合には、上記外輪６を含む、車輪用軸受ユニット５ａの各構成部材の各部を、上記回転側フランジ１３の外側面（図１の左側面）を除いて、所定の形状及び寸法に加工する。又、この回転側フランジ１３の外側面は、おおまかな形状及び寸法に加工する。次いで、スタッド２６を除いた車輪用軸受ユニット５ａの各構成部材を、図１〜３に示す状態に組み立てる。即ち、上記外輪６の内周面に設けた外輪軌道１１ａ、１１ｂと上記ハブ８ａ及び内輪１６の外周面に設けた内輪軌道１４ａ、１４ｂとの間に、複数の玉１７、１７を設けた状態で、上記外輪６とハブ８ａと内輪１６と複数の玉１７、１７とを組み立てる。又、上記外輪６の両端部内周面と上記ハブ８ａ及び内輪１６の端部外周面との間に、１対のシールリング１９ａ、１９ｂを設ける。
【００２３】
そして、この状態で、上記回転側フランジ１３の外側面に旋削加工を施すべき車輪用軸受ユニット５ａを、図示しない旋削加工装置に設置する。この場合、例えば、上記外輪６の中間部外周面で、前記固定側フランジ１２の内側面よりも軸方向内側に外れた部分に設けた円筒面部３２を、上記旋削加工装置を構成するチャックの先端部により掴む。そして、上記ハブ８ａの中心部に設けたスプライン孔２０の内側に上記旋削加工装置に設けたスピンドルの先端部を、上記ハブ８ａの外端側から挿入し、このスピンドルの先端部外周面に設けた雄スプライン部と上記スプライン孔２０とをスプライン係合させる。次いで、上記スピンドルを回転駆動する事により、上記ハブ８ａをその中心軸を中心に回転させた状態で、上記回転側フランジ１３の外側面に図示しない精密加工バイトを突き当て、この外側面に旋削加工を施して、この外側面を所定の形状及び寸法に仕上げる。
【００２４】
この様な、回転側フランジ１３の外側面の旋削加工が終了したならば、上記車輪用軸受ユニット５ａを、上記旋削加工装置から取り外した後、前記各スタッド２６を上記回転側フランジ１３に結合させる為の、図示しない自動組立装置に装着する。この際、上記回転側フランジ１３に設けた複数の取付孔２４のうちの１個の取付孔２４と、前記切り欠き３０との位相を一致させた状態で、上記外輪６とハブ８ａとを図示しない治具に支持する。
【００２５】
そして、上記回転側フランジ１３よりも軸方向内側に、上記取付孔２４と同心に１本のスタッド２６を配置した状態で、このスタッド２６の頭部３１の端面に図示しない押圧部材を押し付け、このスタッド２６に上記取付孔２４に向かう方向の荷重を付与する。そして、上記外輪６の外周面に設けた切り欠き３０をスタッド２６の一部に整合させつつ、上記取付孔２４に、このスタッド２６の先半部に設けた雄ねじ部３３を挿入し、続いて、このスタッド２６の基端寄り部分に設けた雄セレーション部３４を上記取付孔２４に圧入する。更に、上記スタッド２６の頭部３１の片側面（図１の左側面）を、上記回転側フランジ１３の内側面に突き当てる。従って、上記スタッド２６は、上記取付孔２４の軸方向内端側からこの取付孔２４に、この取付孔２４の軸方向に挿入される。
【００２６】
この様にして１本のスタッド２６を１個の取付孔２４に圧入する作業は、残りのスタッド及び取付孔２４に就いても、同様にして行なう。即ち、上記外輪６に対し上記ハブ８ａを所定の角度ずつ回転させる事により、上記スタッド２６を挿入すべき取付孔２４と、前記固定側フランジ１２及び円筒面部３２の外周面に設けた切り欠き３０との位相を一致させた状態で、上記スタッド２６を上記取付孔２４に圧入する。そして、総ての取付孔２４に総てのスタッド２６を圧入する作業が終了したならば、車輪用軸受ユニット５ａを自動組立装置から取り外す。
【００２７】
上述の様に構成する本発明の車輪用軸受ユニットの製造方法とこの製造方法により得た車輪用軸受ユニットの場合、車輪用軸受ユニット５ａの各構成部材を組み立てた後に、ハブ８ａの外周面に設けた、ホイール１及びロータ２を結合固定する為の回転側フランジ１３の外側面に旋削加工を施して、所定の形状及び寸法に仕上げる。この為、上記各構成部材の製造上不可避な寸法誤差や組み付け誤差に拘らず、上記ハブ８ａの回転中心に対する、上記回転側フランジ１３の側面の直角度を高くして、この回転側フランジ１３に固定したロータ２の振れを抑える事ができる。
【００２８】
しかも、本発明の場合には、上記回転側フランジ１３の側面に旋削加工を施した後に、この回転側フランジ１３にスタッド２６を結合固定する為、この回転側フランジ１３の側面の加工作業を容易に行なえる。又、この回転側フランジ１３に上記スタッド２６を結合固定する際に、上記スタッド２６の一部で、上記取付孔２４に挿入すべき部分の全部を、上記取付孔２４の軸方向内端側からこの取付孔２４の内側に、この取付孔２４の軸方向に沿って挿入する。この為、上記回転側フランジ１３に対する上記スタッド２６の結合作業を容易に行なえて、車輪用軸受ユニット５ａの製造作業に要するコストを低減できる。又、本発明によれば、上記回転側フランジ１３に対するスタッド２６の結合作業を自動化できる為、車輪用軸受ユニット５ａの製造作業に要するコストを、より低減できる。しかも、本発明の場合には、上記外輪６の外周面の一部に切り欠き３０を形成すると共に、上記各取付孔２４に上記各スタッド２６を挿入する際に、上記切り欠き３０の内側を上記スタッド２６の一部に整合させる。この為、車輪用軸受ユニット５ａの寸法が特に大きくなる事をなくして、しかも、上記切り欠き３０から外れた部分での上記外輪６の径方向の厚さを十分に確保できる。
【００２９】
この様な、本発明の場合とは異なり、外輪に対してハブを如何に回転させても、車輪用軸受ユニットを軸方向内側から見た場合に、回転側フランジに設けた取付孔と上記外輪とが重畳する場合には、上記スタッドを上記取付孔に、この取付孔の軸方向に挿入できなくなる。この様な場合には、上記スタッドを上記取付孔に挿入する際に、このスタッドの先端寄り部分を上記取付孔に、互いの中心軸同士が不一致になった状態で或る程度迄挿入してから、上記スタッドと上記外輪との干渉を防止しつつ、上記スタッドと上記取付孔との中心軸同士を一致させてから、上記スタッドに設けたセレーション部を上記取付孔に圧入する必要がある。この様な圧入作業は、面倒であるだけでなく、自動組立装置により自動化する事が難しくなる。本発明の場合には、上記回転側フランジ１３に設けた取付孔２４に上記スタッド２６を、始めからこの取付孔２４の軸方向に挿入できる為、この様な不都合が生じる事はない。
【００３０】
更に、本例の場合には、上記外輪６の外周面と上記スタッド２６との干渉を防止すべく、上記外輪６の固定側フランジ１２及び円筒面部３２の外周面の円周方向一部で、自動車に組み付けた状態で自動車の前後方向に関して一端部となる位置に、断面円弧形の切り欠き３０を形成している。この為、上記外輪６の円周方向一部でこの切り欠き３０がその外周面に存在する部分の径方向に関する厚さは比較的小さくなるが、自動車に組み付けた状態で自動車の上下方向に関して両端部となる上記外輪の直径方向反対側２個所位置での径方向に関する厚さは十分に大きくできる。従って、本例の場合には、自動車の旋回時に上記外輪６に作用する曲げモーメントに関する断面二次モーメントに大きく影響する、上下方向に関する上記外輪６の径方向の厚さを十分に大きくできて、この外輪６の外周面の一部に切り欠き３０を形成するのにも拘らず、車輪用軸受ユニット５ａの耐久性を十分に確保できる。
【００３１】
尚、上記切り欠き３０は、本例の場合と異なり、上記固定側フランジ１２及び円筒面部３２の外周面の円周方向一部で、自動車に組み付けた状態で自動車の前後方向に関して他端部（図２の左端部）となる位置に形成する事もできる。又、上記外輪６を鍛造加工により造る場合には、鍛造加工に用いる金型の形状が、この金型の中心軸に関して著しく非対称であると、この金型に大きな曲げモーメントが作用して、この金型の寿命が短くなる可能性がある。本例の場合、上記外輪６の固定側フランジ１２及び円筒面部３２のそれぞれ円周方向１個所位置のみに切り欠き３０を形成している為、上記外輪６を鍛造加工により造る場合には、この鍛造加工に用いる金型の形状がこの金型の中心軸に関して非対称になる。従って、本発明を実施する場合で、上記外輪６を鍛造加工により造る場合には、この鍛造加工に用いる金型の寿命を長くする面から、好ましくは、上記切り欠き３０を、それぞれ上記外輪６の径方向に関して反対側２個所位置に形成して、上記金型の形状を中心軸に関して対称な形状に近づける。この様にすれば、上記外輪６の鍛造加工時に、上記金型に作用する曲げモーメントを十分に小さくできる為、この金型の寿命を長くして、車輪用軸受ユニット５ａの量産時の製造コストの低減を図れる。
【００３２】
次に、図４〜７は、本発明の実施の形態の第２例を示している。本例の場合には、ハブ８ｂの中間部外周面に１対の内輪１６、１６を外嵌固定すると共に、これら各内輪１６、１６の外周面に内輪軌道１４ａ、１４ｂを形成している。又、複数の玉１７、１７を設けた内部空間２７を外部から密封する為の１対のシールリング１９ａ、１９ｂを、上記各内輪１６、１６の端部外周面と外輪６の両端部内周面との間に設けている。
【００３３】
特に、本例の場合には、上記ハブ８ｂの回転側フランジ１３に設けた複数の取付孔２４、２４に挿入する為の各スタッド２６の頭部３１の円周方向一部に、平面状の第二の切り欠き３５を形成している。又、外輪６に設けた固定側フランジ１２の外周面のみに、断面円弧形の切り欠き３０を形成している。本例の場合には、上述した第１例の場合と異なり、上記外輪６の外周面で、軸方向内端寄り部分に設けた円筒面部３２の外周面には、切り欠きを形成していない。従って、本例の場合には、上記固定側フランジ１２の外周面に形成した切り欠き３０の、上記外輪６の径方向に関する深さｄ30（図５）を、上述した第１例の場合よりも小さくできる。
【００３４】
そして、上記固定側フランジ１２に設けた切り欠き３０と上記各取付孔２４、２４との位置を、次述する所定の関係に規制している。先ず、車輪用軸受ユニット５ａの各構成部材を組み立てた状態で、上記ハブ８ｂの回転側フランジ１３に設けた複数の取付孔２４、２４のうち、１個の取付孔２４と、上記切り欠き３０との位相を一致させた状態を仮定する。そして、上記１個の取付孔２４に挿入すべき上記スタッド２６を、上記回転側フランジ１３よりも軸方向内側に、この取付孔２４と同心に配置した状態を仮定する。又、この場合に、上記スタッド２６の頭部３１に形成した第二の切り欠き３５を、上記固定側フランジ１２に形成した切り欠き３０の側に向けた状態とする。そして、この状態で、上記スタッド２６とこのスタッド２６を取り付けるべき車輪用軸受ユニット５ａとを軸方向内側から見た場合に、上記スタッド２６の頭部３１と上記外輪６とが重畳しない様にしている。
【００３５】
上述の様に構成する本例の車輪用軸受ユニットを製造する場合には、車輪用軸受ユニット５ａの各構成部材を組み立てた状態で、上記ハブ８ｂを回転させつつ、上記回転側フランジ１３の外側面に旋削加工を施して、この外側面を所定の形状及び寸法に仕上げる。次いで、車輪用軸受ユニット５ａを図示しない自動組立装置に、上記外輪６の外周面に形成した切り欠き３０と１個の取付孔２４との位相を一致させた状態で装着すると共に、上記回転側フランジ１３に関する軸方向内側に、上記取付孔２４と同心に１本のスタッド２６を配置する。この場合に、このスタッド２６の頭部３１に形成した第二の切り欠き３５は、上記外輪６の外周面に形成した切り欠き３０の側に向けた状態とする。そして、図示しない押圧装置により上記スタッド２６に荷重を付与する事により、上記第二の切り欠き３５の片側を上記切り欠き３０の内側に整合させつつ、上記スタッド２６を上記取付孔２４の内側に、この取付孔２４の軸方向に沿って圧入する。この様にして１本のスタッド２６を１個の取付孔２４に圧入する作業は、残りのスタッド２６及び取付孔２４に就いても、同様にして行なう。
【００３６】
この様な本例の場合にも、上述した第１例の場合と同様に、回転側フランジ１３の外側面の加工作業を容易に行なえると共に、この回転側フランジ１３に対するスタッド２６の結合作業を容易に行なえる。又、本例の場合には、各スタッド２６の頭部３１の円周方向一部に第二の切り欠き３５を形成している為、上記外輪６の軸方向内端寄り部分に設けた円筒面部３２に切り欠きを形成する事なく、しかも、上記固定側フランジ１２に設けた切り欠き３０の深さｄ30を比較的小さくした構造で、上記回転側フランジ１３に形成した取付孔２４、２４に上記各スタッド２６を圧入する作業を、容易に行なえる。
その他の構成及び作用に就いては、上述した第１例の場合と同様である為、重複する説明は省略する。
【００３７】
尚、本例の場合とは別に、回転側フランジ１３に設けた取付孔２４にスタッド２６を挿入する際に、このスタッド２６の頭部３１の円周方向一部に第二の切り欠き３５を形成するのみで、上記スタッド２６と外輪６との干渉を防止できるのであれば、上記外輪６の外周面に切り欠き３０（図４、５）を形成しなくても良い。
【００３８】
又、上述した各例に於いては、回転側フランジ１３の外側面に旋削加工を施して、この外側面を所定の形状及び寸法に仕上げる場合に就いて説明したが、本発明は、この様な場合に限定するものではない。本発明は、上記回転側フランジ１３の外側面に、砥石を用いた研削加工等により、この外側面を所定の形状及び寸法に仕上げる場合でも実施できる。
【００３９】
【発明の効果】
本発明の車輪用軸受ユニットとその製造方法は、以上に述べた通り構成され作用するので、制動時に発生する不快な騒音や振動を十分に抑制できる構造を、安価に得られる。
【図面の簡単な説明】
【図１】本発明の実施の形態の第１例を、回転側フランジに設けた複数の取付孔のうちの１個の取付孔に、１本のスタッドを挿入する直前の状態で示す、図２のＡ−Ｏ−Ｂ断面図。
【図２】回転側フランジに設けた取付孔にスタッドを挿入する前の状態で示す、図１の右方から見た図。
【図３】図２のＣ部拡大図。
【図４】本発明の実施の形態の第２例を示す、図１と同様の図。
【図５】同じく第２例を示す、図３と同様の図。
【図６】第２例の車輪用軸受ユニットに用いるスタッドを示す図。
【図７】図６の右方から見た図。
【図８】本発明の対象となる車輪用軸受ユニットの組み付け状態の１例を示す断面図。
【符号の説明】
１ ホイール
２ ロータ
３ ナックル
４ 支持孔
５、５ａ 車輪用軸受ユニット
６ 外輪
７ ボルト
８、８ａ、８ｂ ハブ
９ スタッド
１０ ナット
１１ａ、１１ｂ 外輪軌道
１２ 固定側フランジ
１３ 回転側フランジ
１４ａ、１４ｂ 内輪軌道
１５ 小径段部
１６ 内輪
１７ 玉
１８ 保持器
１９ａ、１９ｂ シールリング
２０ スプライン孔
２１ 等速ジョイント
２２ スプライン軸
２３、２３ａ 回転部材
２４ 取付孔
２５ かしめ部
２６ スタッド
２７ 内部空間
２８ 芯金
２９ エンコーダ
３０ 切り欠き
３１ 頭部
３２ 円筒面部
３３ 雄ねじ部
３４ 雄セレーション部
３５ 第二の切り欠き[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wheel bearing unit for supporting a vehicle wheel and a rotating rotor for braking such as a rotor or a drum, and an improvement in a method for manufacturing such a wheel bearing unit.
[0002]
[Prior art]
A wheel 1 constituting a wheel of an automobile and a rotor 2 constituting a disc brake as a braking device are rotatably supported on a knuckle 3 constituting a suspension device, for example, by a structure as shown in FIG. That is, the outer ring 6 constituting the wheel bearing unit 5 which is the subject of the present invention is fixed to the circular support hole 4 formed in the knuckle 3 by a plurality of bolts 7. On the other hand, the wheel 1 and the rotor 2 are coupled and fixed to a hub 8 constituting the wheel bearing unit 5 by a plurality of studs 9 and nuts 10.
[0003]
Double row outer ring raceways 11a and 11b are formed on the inner peripheral surface of the outer ring 6, and a fixed flange 12 is formed on the outer peripheral surface. Such an outer ring 6 is fixed to the knuckle 3 by connecting the fixed flange 12 to the knuckle 3 with the bolts 7.
[0004]
On the other hand, in a part of the outer peripheral surface of the hub 8, the outer end opening of the outer ring 6 (outside with respect to the axial direction means a portion that is on the outer side in the width direction when assembled to an automobile, , 8 On the contrary, the right side of FIGS. 1, 4 and 8, which is the center in the width direction when assembled to the automobile, is said to be the inside in the axial direction. Is forming. The wheel 1 and the rotor 2 are coupled and fixed to one side surface (outer surface in the illustrated example) of the rotation side flange 13 by the studs 9 and the nuts 10. A male serration portion 34 is formed on the outer peripheral surface of the proximal end portion of the stud 9, and the male serration portion 34 is inserted into the mounting hole 24 provided in the rotation side flange 13 from the axially inner side to the axially outer side. The studs 9 are coupled and fixed to the rotation side flange 13 by press-fitting. Further, an inner ring raceway 14a is formed on the outer peripheral surface of the intermediate portion of the hub 8 at a portion of the double row outer ring raceways 11a and 11b that faces the outer outer raceway 11a. Further, an inner ring 16 that constitutes a rotating member 23 together with the hub 8 is externally fitted and fixed to a small diameter step portion 15 formed on the outer peripheral surface of the inner end portion of the hub 8. The inner ring raceway 14b formed on the outer peripheral surface of the inner ring 16 is opposed to the inner outer ring raceway 11b of the double row outer ring raceways 11a and 11b.
[0005]
Between each of the outer ring raceways 11a and 11b and each of the inner ring raceways 14a and 14b, a plurality of balls 17 and 17 each serving as a rolling element can be rolled while being held by cages 18 and 18, respectively. Provided. With this configuration, a double-row angular type ball bearing which is a rear combination is configured, and the rotating member 23 is supported on the inner side of the outer ring 6 so as to be rotatable and to support a radial load and a thrust load. . Seal rings 19a and 19b are provided between the inner peripheral surface of both ends of the outer ring 6, the outer peripheral surface of the intermediate part of the hub 8 and the outer peripheral surface of the inner end of the inner ring 16, respectively. , 17 is isolated from the internal space and the outside. Further, since the illustrated example is a wheel bearing unit 5 for driving wheels (rear wheels of FR and RR vehicles, front wheels of FF vehicles, all wheels of 4WD vehicles), a spline is provided at the center of the hub 8. A hole 20 is formed. The spline shaft 22 of the constant velocity joint 21 is inserted into the spline hole 20.
[0006]
When the wheel rolling bearing unit 5 as described above is used, as shown in FIG. 8, the outer ring 6 is fixed to the knuckle 3, and the wheel 1 in which the unillustrated tire is combined with the rotating side flange 13 of the hub 8 and braking. The rotor 2 which is a rotating body for use is fixed. A brake disc brake is configured by combining the rotor 2 and the support and caliper (not shown) fixed to the knuckle 3. At the time of braking, a pair of pads provided with the rotor 2 interposed therebetween are pressed against both side surfaces which are the frictional surfaces for braking of the rotor 2. In this specification, the braking friction surface refers to both axial side surfaces of the rotor when the braking rotator is a rotor, and the braking rotator is a drum constituting a drum brake. Says the inner surface of this drum.
[0007]
On the other hand, it is known that vibration with unpleasant noise, called judder, is often generated when a vehicle is braked. There are various known causes of such vibration, such as uneven friction between the side surface of the rotor 2 and the lining of the pad. However, it is known that the vibration of the rotor 2 is also a major cause. It has been. That is, the side surface of the rotor 2 should be perpendicular to the rotation center of the rotor 2, but it is difficult to make it completely perpendicular due to inevitable manufacturing errors. As a result, it is inevitable that the side surface of the rotor 2 swings in the direction of the rotation axis (left-right direction in FIG. 8), although it is somewhat, when the automobile is running. When such deflection (the amount of displacement in the left-right direction in FIG. 8) increases, the judder occurs when the lining of a pair of pads is pressed against both side surfaces of the rotor 2 for braking. In addition, when the drum constituting the drum brake is fixed to the side surface of the rotation side flange 13, the shoe is fixed inside the drum unless the inner peripheral surface of the drum is completely parallel to the rotation center of the drum. When pressed against the circumferential surface, vibration like judder is also generated.
[0008]
In order to suppress judder caused by such a cause, it is important to suppress (improve) axial runout (axial runout) of the side surface of the rotor 2 or radial runout of the inner peripheral surface of the drum. It becomes. In order to suppress this deflection, it is important to improve the perpendicularity of the mounting surface of the rotation side flange 13 (one side surface of the rotation side flange 13) with respect to the rotation center of the hub 8. U.S. Pat. No. 6,071,180 describes a method for manufacturing a wheel bearing unit for improving the perpendicularity of the mounting surface of the rotating flange 13. In the case of the wheel bearing unit manufacturing method described in this specification, when processing one side surface of the rotation side flange provided on the outer peripheral surface of the hub into a predetermined shape and size, first, this one side surface is processed. Assemble each component of the wheel bearing unit including the front hub. Next, the fixed flange provided on the outer peripheral surface of the outer ring is fixed to a part of the processing apparatus, and then the hub is rotated by the spindle, and grinding is performed on one side of the rotary flange provided on the outer peripheral surface of the hub. The tool is abutted and the one side surface is finished to a predetermined shape and size. When a wheel bearing unit is manufactured by such a method, the perpendicularity of one side surface of the rotation side flange with respect to the rotation center of the hub is improved regardless of the dimensional errors and assembly errors that are unavoidable in manufacturing each component. Therefore, it is possible to suppress the shake of a rotating braking body such as a rotor fixed to one side surface.
[0009]
[Problems to be solved by the invention]
In the case of the manufacturing method of the wheel bearing unit described in the above-mentioned US Pat. No. 6,071,180, the structure for fixing the wheel and the rotor to one side surface of the rotation side flange is particularly considered. It is not done. However, when the actual wheel bearing unit is used, in order to fix the wheel and the rotor to one side surface of the rotation side flange, the circle of the rotation side flange 13 is the same as in the case of the conventional structure shown in FIG. It is necessary to connect the base end portions of the studs 9 and 9 to a plurality of locations in the circumferential direction. Then, the wheel 1 and the rotor 2 are fixed to one side surface of the rotation side flange 13 by the plurality of studs 9 and 9 and the plurality of nuts 10 and 10 coupled to the front end portions of the studs 9 and 9. .
[0010]
However, like the method for manufacturing a wheel bearing unit described in the above-mentioned U.S. Patent Specification, after assembling each component of the wheel bearing unit, one side of the rotation side flange is formed into a predetermined shape and ground by grinding or the like. When finishing to dimensions, the work of connecting each stud to the rotating flange can be quite cumbersome. That is, in the case of the conventional structure, it has not been considered to connect each stud to the rotation side flange after assembling each component of the wheel bearing unit. For this reason, in the case of the conventional structure, generally, a virtual cylinder formed by extending the outer peripheral surface of the head of the stud inward in the axial direction in a state where the stud is fixed to the mounting hole provided in the rotation side flange. The surface and a part of the outer ring such as the fixed side flange interfere with each other. Particularly, in the structure in which the dimension of the wheel bearing unit is not particularly increased and the radial thickness of the outer ring is sufficiently secured, the virtual cylindrical surface and a part of the outer ring are likely to interfere with each other. In this case, the studs cannot be inserted in the axial direction of the mounting holes from the inner end side in the axial direction of the mounting holes to the inner side of the mounting holes. For this reason, not only does the operation of joining the studs to the rotation side flange become considerably troublesome, but also it becomes difficult to automate the operation of joining the studs to the rotation side flange by an automatic assembly device or the like. And the cost which the manufacturing operation of the wheel bearing unit requires increases.
[0011]
On the other hand, after fixing the base end portion of each stud to the rotating flange, the components of the wheel bearing unit including the rotating flange are assembled, and then finished on one side of the rotating flange. It is also possible to apply processing. However, in this case, it is necessary to finish the one side surface of the rotation side flange while avoiding a portion protruding from one side surface of the rotation side flange at a part of each stud. Since such a finishing process is considerably troublesome, the cost required for manufacturing the wheel bearing unit is also increased.
The wheel bearing unit and the manufacturing method thereof according to the present invention have been invented in view of such circumstances.
[0012]
[Means for Solving the Problems]
Of the wheel bearing unit and the manufacturing method thereof according to the present invention, the wheel bearing unit according to claim 1 is, like the conventional wheel bearing unit described above, a fixed flange for fixing to the vehicle body on the outer peripheral surface. Each having an outer ring raceway on the inner peripheral surface and not rotating during use, a rotating member having an inner ring raceway on the outer peripheral surface and rotating during use, and between the inner ring raceway and the outer ring raceway. A plurality of rolling elements provided, and a rotation-side flange that is provided on the outer peripheral surface of the outer end portion of the rotating member and that couples and fixes a braking rotator and wheels to the side surface in use.
[0013]
In particular, in the wheel bearing unit according to claim 1, the mounting hole formed in a part of the rotation side flange, and the coupling is fixed to the rotation side flange while being inserted into the mounting hole. A stud, and a notch formed in a part of an outer peripheral surface of at least one of the outer ring and the stud. Then, after assembling the outer ring, the rotating member, and a plurality of rolling elements, the stud is processed into a predetermined shape and dimensions on the side surface of the rotating flange, and then the notch is formed on the outer periphery of the stud or the outer ring. It is inserted into the mounting hole from the axially inner end side of the mounting hole while being aligned with the surface, and is coupled and fixed to the rotation side flange.
[0014]
Furthermore, the manufacturing method of the wheel bearing unit according to claim 2 is the manufacturing method of the wheel bearing unit according to claim 1, wherein the outer ring, the rotating member, and the plurality of rolling elements are assembled. While rotating the rotating member with respect to the outer ring, the side surface of the rotating side flange for coupling and fixing the braking rotor and the wheel is processed into a predetermined shape and size, and then the notch is formed on the stud or the outer ring. The stud is inserted into the mounting hole from the axially inner end side of the mounting hole while being aligned with the outer peripheral surface, and the stud is coupled and fixed to the rotation side flange.
[0015]
[Action]
In the case of the wheel bearing unit of the present invention configured as described above and the manufacturing method thereof, after assembling the outer ring, the rotating member, and a plurality of rolling elements, a braking rotating body provided on the outer peripheral surface of the rotating member, and The side surface of the rotation side flange for coupling and fixing the wheel is processed into a predetermined shape and size. For this reason, regardless of dimensional errors and assembly errors that are unavoidable in manufacturing each component member, the perpendicularity of the side surface of the rotation side flange with respect to the rotation center of the rotation member is increased, and the brake fixed to the rotation side flange is fixed. The runout of the rotating body can be suppressed. In addition, in the case of the present invention, after processing the side surface of the rotating side flange into a predetermined shape and size, a stud is coupled and fixed to the rotating side flange. Yes. Further, when the stud is coupled and fixed to the rotation side flange, the stud can be inserted into the mounting hole in the axial direction of the mounting hole. For this reason, it is possible to easily perform the operation of joining the stud to the rotation side flange, and to reduce the cost required for the manufacturing operation of the wheel bearing unit. Further, according to the present invention, the operation of joining the stud to the rotation side flange can be automated by an automatic assembling apparatus or the like, and the cost required for manufacturing the wheel bearing unit can be further reduced. In addition, in the case of the present invention, a notch is formed in a part of the outer peripheral surface of at least one of the outer ring and the stud, and the notch is inserted when the stud is inserted into the mounting hole. In order to align with the outer peripheral surface of the stud or the outer ring, the dimension of the wheel bearing unit is not particularly increased, and the radial thickness of the outer ring can be sufficiently secured.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show a first example of an embodiment of the present invention. The wheel bearing unit 5a manufactured by the manufacturing method of this example is provided with a fixed-side flange 12 for fixing the outer ring 6 to the knuckle 3 (FIG. 8) on the outer peripheral surface of the intermediate part of the outer ring 6. Further, double-row outer ring raceways 11 a and 11 b are formed on the inner peripheral surface of the outer ring 6. And in the outer peripheral surface of the intermediate part of the outer ring 6, it is fitted into the support hole 4 (FIG. 8) provided in the knuckle 3 in a part that is axially inward from the inner surface of the fixed flange 12. A cylindrical surface portion 32 is formed.
[0017]
Further, inner ring raceways 14a and 14b are respectively provided on the outer peripheral surfaces of the hub 8a and the inner ring 16 constituting the rotating member 23a at portions facing the outer ring raceways 11a and 11b. That is, the inner ring raceway 14a is directly formed on the outer peripheral surface of the intermediate portion of the hub 8a, and the inner ring 16 having the inner ring raceway 14b formed on the outer peripheral surface thereof is formed on the small diameter step portion 15 formed near the inner end of the hub 8a. It is fitted. In order to prevent the inner ring 16 from slipping out of the small diameter step portion 15, a caulking portion 25 is formed at the inner end portion of the hub 8a. That is, after the inner ring 16 is externally fitted to the small-diameter step portion 15, the portion protruding from the inner end surface of the inner ring 16 at the inner end portion of the hub 8a is plastically deformed radially outward to form the caulking portion 25. The inner end surface of the inner ring 16 is held down by the caulking portion 25. With this configuration, the inner ring 16 is externally fitted and fixed to the inner end portion of the hub 8a.
[0018]
Further, a portion near the outer end of the outer peripheral surface of the hub 8a and a portion protruding from the outer end opening of the outer ring 6 includes a wheel 1 constituting a wheel and a rotor 2 (FIG. 8) that is a rotating body for braking. A rotation side flange 13 for fixing the drum is provided. A plurality of mounting holes 24 are formed on the same circumference around the center of rotation of the hub 8a at a plurality of locations in the circumferential direction of the rotation side flange 13, and a plurality of studs are formed inside the mounting holes 24. The base end portions of 26 are press-fitted and fixed, respectively.
[0019]
Further, between the outer ring raceways 11a and 11b and the inner ring raceways 14a and 14b, a plurality of balls 17 and 17 each of which is a rolling element are rolled while being held by cages 18 and 18, respectively. It is provided freely. A pair of seal rings 19a and 19b are provided between the inner peripheral surfaces of both ends of the outer ring 6, the intermediate outer peripheral surface of the hub 8a and the inner end outer peripheral surface of the inner ring 16, and The internal space 27 provided with the balls 17 and 17 is shut off from the outside to prevent leakage of grease sealed in the internal space 27 and to prevent foreign matters from entering the internal space 27.
[0020]
Further, in the case of this example, an inner seal ring 19b of the pair of seal rings 19a and 19b is configured, and an encoder is attached to the side surface of the cored bar 28 fitted and fixed to the inner end portion of the inner ring 16. 29 is fixed. The encoder 29 is made of a rubber magnet in which S poles and N poles are alternately arranged in the circumferential direction. That is, the encoder 29 is a rubber magnet in which ferrite powder is mixed in rubber and formed in a ring shape, and is magnetized in the axial direction. The magnetization direction is changed alternately and at equal intervals over the circumferential direction. Accordingly, on the inner surface of the encoder 29, the S poles and the N poles are alternately arranged at equal intervals over the circumferential direction. When the wheel bearing unit 5a is used, a detection unit of a sensor (not shown) supported by a fixed part such as a part of a suspension device is opposed to the inner surface of the encoder 29 via a minute gap. Then, the output signal of the sensor, which changes according to the rotation speed of the encoder 29, can be taken out freely. Such an encoder 29 and sensor constitute a rotational speed detection device for detecting the rotational speed of the wheel fixed to the hub 8a.
[0021]
In particular, in the case of the present invention, one end of the fixed-side flange 12 provided on the outer peripheral surface of the outer ring 6 and the cylindrical surface portion 32 in the circumferential direction, with respect to the front-rear direction of the vehicle in a state assembled to the vehicle (see FIG. 2 in the axial direction (the left-right direction in FIG. 1, the back-and-front direction in FIGS. 2 and 3) in a state where a notch 30 having a circular arc cross section is continuously provided from the fixed flange 12 to the cylindrical surface portion 32. ). In the case of the present invention, the positions of the notch 30 and the mounting holes 24 and 24 are restricted to a predetermined relationship described below. First, in a state in which the constituent members of the wheel bearing unit 5a are assembled, Hub 8a Of the plurality of mounting holes 24, 24 provided in the rotation-side flange 13, a state is assumed in which the phase in the rotation direction of one mounting hole 24 and the notch 30 is matched. Then, it is assumed that the stud 26 to be inserted into the one mounting hole 24 is disposed concentrically with the mounting hole 24 on the inner side in the axial direction than the rotation side flange 13. In this state, when the stud 26 and the wheel bearing unit 5a to which the stud 26 is to be attached are viewed from the inside in the axial direction, the head 31 of the stud 26 and the outer ring 6 do not overlap each other. I have to.
[0022]
When manufacturing the wheel bearing unit of this example, each part of each component of the wheel bearing unit 5a including the outer ring 6 is excluded from the outer side surface (the left side surface in FIG. 1) of the rotation side flange 13. Then, it is processed into a predetermined shape and size. Further, the outer surface of the rotation side flange 13 is processed into a rough shape and size. Next, each component of the wheel bearing unit 5a excluding the stud 26 is assembled in the state shown in FIGS. That is, a state in which a plurality of balls 17, 17 are provided between the outer ring raceways 11a, 11b provided on the inner peripheral surface of the outer ring 6 and the inner ring raceways 14a, 14b provided on the outer peripheral surfaces of the hub 8a and the inner ring 16. Thus, the outer ring 6, the hub 8a, the inner ring 16, and the plurality of balls 17, 17 are assembled. A pair of seal rings 19a and 19b is provided between the inner peripheral surfaces of both ends of the outer ring 6 and the outer peripheral surfaces of the hub 8a and the inner ring 16.
[0023]
In this state, the wheel bearing unit 5a to be turned on the outer surface of the rotation side flange 13 is installed in a turning device (not shown). In this case, for example, a cylindrical surface portion 32 provided on a portion of the outer peripheral surface of the outer ring 6 that is axially inward from the inner surface of the fixed flange 12 is used as a tip of a chuck constituting the turning device. Grab by part. Then, the tip of the spindle provided in the turning device is inserted from the outer end side of the hub 8a inside the spline hole 20 provided in the center of the hub 8a, and is provided on the outer peripheral surface of the tip of the spindle. The male spline portion and the spline hole 20 are spline engaged. Next, by rotating the spindle, a precision cutting tool (not shown) is abutted against the outer surface of the rotating flange 13 while the hub 8a is rotated about its central axis, and turning is performed on the outer surface. Processing is performed to finish the outer surface to a predetermined shape and size.
[0024]
When the turning of the outer surface of the rotation side flange 13 is completed, the wheel bearing unit 5a is removed from the turning device, and then the studs 26 are coupled to the rotation side flange 13. For this purpose, it is mounted on an automatic assembly device (not shown). At this time, the outer ring 6 and the hub 8a are illustrated in a state in which the phase of the one mounting hole 24 of the plurality of mounting holes 24 provided in the rotation side flange 13 and the notch 30 is matched. Do not support the jig.
[0025]
Then, in the state where one stud 26 is disposed concentrically with the mounting hole 24 on the inner side in the axial direction than the rotation side flange 13, a pressing member (not shown) is pressed against the end surface of the head portion 31 of the stud 26. A load in a direction toward the mounting hole 24 is applied to the stud 26. Then, while aligning the notch 30 provided on the outer peripheral surface of the outer ring 6 with a part of the stud 26, the male screw portion 33 provided in the front half of the stud 26 is inserted into the mounting hole 24, and subsequently The stud 26 is provided near the base end. Male serration club 34 is press-fitted into the mounting hole 24. Further, one side surface (the left side surface in FIG. 1) of the head portion 31 of the stud 26 is abutted against the inner surface of the rotation side flange 13. Therefore, the stud 26 is inserted into the mounting hole 24 from the axially inner end side of the mounting hole 24 in the axial direction of the mounting hole 24.
[0026]
The operation of press-fitting one stud 26 into one mounting hole 24 in this manner is performed in the same manner for the remaining studs and mounting holes 24. That is, by rotating the hub 8a by a predetermined angle with respect to the outer ring 6, the mounting hole 24 into which the stud 26 is to be inserted, and the notch 30 provided on the outer peripheral surface of the fixed flange 12 and the cylindrical surface portion 32. The stud 26 is press-fitted into the mounting hole 24 in a state in which the phase is matched. When all the studs 26 are press-fitted into all the mounting holes 24, the wheel bearing unit 5a is removed from the automatic assembly apparatus.
[0027]
In the case of the wheel bearing unit manufacturing method of the present invention configured as described above and the wheel bearing unit obtained by this manufacturing method, after assembling the constituent members of the wheel bearing unit 5a, the outer peripheral surface of the hub 8a is assembled. The outer surface of the rotation side flange 13 for connecting and fixing the wheel 1 and the rotor 2 is turned to finish it into a predetermined shape and size. For this reason, regardless of the dimensional errors and assembly errors that are unavoidable in manufacturing the respective components, the squareness of the side surface of the rotation side flange 13 with respect to the rotation center of the hub 8a is increased to The vibration of the fixed rotor 2 can be suppressed.
[0028]
In addition, in the case of the present invention, after turning the side surface of the rotation side flange 13, the stud 26 is coupled and fixed to the rotation side flange 13, so that the side surface of the rotation side flange 13 can be easily processed. It can be done. Further, when the stud 26 is coupled and fixed to the rotation side flange 13, all of the portion of the stud 26 to be inserted into the mounting hole 24 is moved from the axially inner end side of the mounting hole 24. The inner side of the mounting hole 24 is inserted along the axial direction of the mounting hole 24. For this reason, the operation of connecting the stud 26 to the rotating flange 13 can be easily performed, and the cost required for the manufacturing operation of the wheel bearing unit 5a can be reduced. Further, according to the present invention, since the connecting operation of the stud 26 to the rotating side flange 13 can be automated, the cost required for the manufacturing operation of the wheel bearing unit 5a can be further reduced. In addition, in the case of the present invention, the notch 30 is formed in a part of the outer peripheral surface of the outer ring 6, and when the studs 26 are inserted into the mounting holes 24, the inner side of the notch 30 is formed. Align with a part of the stud 26. For this reason, the dimension of the wheel bearing unit 5a does not become particularly large, and the thickness of the outer ring 6 in the radial direction at the portion removed from the notch 30 can be sufficiently secured.
[0029]
Unlike the case of the present invention, when the hub is rotated with respect to the outer ring, the mounting hole provided in the rotation side flange and the outer ring when the wheel bearing unit is viewed from the inner side in the axial direction. Are superimposed, the stud cannot be inserted into the mounting hole in the axial direction of the mounting hole. In such a case, when the stud is inserted into the mounting hole, the portion near the tip of the stud is inserted into the mounting hole to a certain extent with the center axes of the studs being inconsistent. Therefore, it is necessary to press-fit the serration portion provided in the stud into the mounting hole after the center axes of the stud and the mounting hole coincide with each other while preventing interference between the stud and the outer ring. Such press-fitting work is not only troublesome but also difficult to automate with an automatic assembly device. In the case of the present invention, since the stud 26 can be inserted into the mounting hole 24 provided in the rotation side flange 13 from the beginning in the axial direction of the mounting hole 24, such inconvenience does not occur.
[0030]
Furthermore, in the case of this example, in order to prevent interference between the outer peripheral surface of the outer ring 6 and the stud 26, a part of the outer peripheral surface of the fixed side flange 12 and the cylindrical surface portion 32 of the outer ring 6 in the circumferential direction, A cutout 30 having an arc-shaped cross section is formed at a position that becomes one end in the front-rear direction of the automobile when assembled in the automobile. For this reason, the thickness in the radial direction of the portion of the outer ring 6 in the circumferential direction where the notch 30 is present on the outer circumferential surface is relatively small. The thickness in the radial direction at the two positions on the opposite side in the radial direction of the outer ring as the part can be made sufficiently large. Therefore, in the case of this example, the radial thickness of the outer ring 6 in the vertical direction can be sufficiently increased, which greatly affects the secondary moment of inertia related to the bending moment acting on the outer ring 6 when the vehicle turns. Despite the formation of the notch 30 in a part of the outer peripheral surface of the outer ring 6, the durability of the wheel bearing unit 5a can be sufficiently ensured.
[0031]
Unlike the case of this example, the notch 30 is a part of the outer peripheral surface of the fixed flange 12 and the cylindrical surface portion 32 in the circumferential direction, and the other end portion in the front-rear direction of the automobile when assembled to the automobile ( It can also be formed at a position that becomes the left end portion in FIG. Further, when the outer ring 6 is made by forging, if the shape of the die used for forging is extremely asymmetric with respect to the central axis of the die, a large bending moment acts on the die. Mold life may be shortened. In the case of this example, the notch 30 is formed only at one position in the circumferential direction of each of the stationary flange 12 and the cylindrical surface portion 32 of the outer ring 6. The shape of the mold used for forging is asymmetric with respect to the central axis of the mold. Therefore, when the outer ring 6 is manufactured by forging in the case of carrying out the present invention, preferably, the notch 30 is respectively formed on the outer ring 6 from the viewpoint of extending the life of the mold used for the forging. Are formed at two positions opposite to each other in the radial direction, and the shape of the mold is brought close to a symmetrical shape with respect to the central axis. In this way, the bending moment acting on the mold during the forging of the outer ring 6 can be made sufficiently small, so that the life of the mold can be extended and the manufacturing cost for mass production of the wheel bearing unit 5a can be increased. Can be reduced.
[0032]
Next, FIGS. 4 to 7 show a second example of the embodiment of the present invention. In the case of this example, a pair of inner rings 16, 16 are fitted and fixed to the outer peripheral surface of the intermediate portion of the hub 8b, and inner ring raceways 14a, 14b are formed on the outer peripheral surfaces of the inner rings 16, 16. Also, a pair of seal rings 19a and 19b for sealing the internal space 27 provided with the plurality of balls 17 and 17 from the outside are provided with outer peripheral surfaces at the ends of the inner rings 16 and 16 and inner peripheral surfaces at both ends of the outer ring 6. Between.
[0033]
In particular, in the case of this example, a planar shape is formed on a part of the circumferential direction of the head 31 of each stud 26 to be inserted into the plurality of mounting holes 24, 24 provided in the rotation side flange 13 of the hub 8b. A second notch 35 is formed. Further, a notch 30 having a circular arc cross section is formed only on the outer peripheral surface of the fixed flange 12 provided on the outer ring 6. In the case of this example, unlike the case of the first example described above, notches are not formed on the outer peripheral surface of the outer ring 6 on the outer peripheral surface of the cylindrical surface portion 32 provided near the inner end in the axial direction. . Therefore, in the case of this example, the depth d of the notch 30 formed on the outer peripheral surface of the fixed-side flange 12 in the radial direction of the outer ring 6. 30 (FIG. 5) can be made smaller than in the case of the first example described above.
[0034]
And the position of the notch 30 provided in the said fixed side flange 12 and each said attachment hole 24, 24 is controlled to the predetermined relationship mentioned below. First, in a state in which the constituent members of the wheel bearing unit 5a are assembled, Hub 8b Of the plurality of mounting holes 24, 24 provided in the rotation-side flange 13 is assumed to be in a state where the phases of one mounting hole 24 and the notch 30 are matched. Then, it is assumed that the stud 26 to be inserted into the one mounting hole 24 is arranged concentrically with the mounting hole 24 on the inner side in the axial direction than the rotation side flange 13. In this case, the second notch 35 formed in the head portion 31 of the stud 26 is directed toward the notch 30 formed in the fixed flange 12. In this state, when the stud 26 and the wheel bearing unit 5a to which the stud 26 is to be attached are viewed from the inside in the axial direction, the head 31 of the stud 26 and the outer ring 6 are not overlapped. Yes.
[0035]
When manufacturing the wheel bearing unit of the present example configured as described above, the hub 8b is rotated while the components of the wheel bearing unit 5a are assembled, and the outer side of the rotation side flange 13 is rotated. The side surface is turned to finish the outer surface into a predetermined shape and size. Next, the wheel bearing unit 5a is mounted on an automatic assembly device (not shown) in a state where the notches 30 formed on the outer peripheral surface of the outer ring 6 are in phase with one mounting hole 24, and the rotation side One stud 26 is arranged concentrically with the mounting hole 24 on the axially inner side with respect to the flange 13. In this case, the second notch 35 formed in the head portion 31 of the stud 26 is directed to the notch 30 formed on the outer peripheral surface of the outer ring 6. Then, by applying a load to the stud 26 by a pressing device (not shown), the stud 26 is placed inside the mounting hole 24 while aligning one side of the second notch 35 with the inside of the notch 30. , And press-fit along the axial direction of the mounting hole 24. The operation of press-fitting one stud 26 into one mounting hole 24 in this manner is performed in the same manner for the remaining studs 26 and mounting holes 24.
[0036]
In the case of this example as well, as in the case of the first example described above, the outer surface of the rotation side flange 13 can be easily processed, and the stud 26 can be joined to the rotation side flange 13. It can be done easily. In the case of this example, since the second notch 35 is formed in a part in the circumferential direction of the head portion 31 of each stud 26, the cylinder provided in the axial direction inner end portion of the outer ring 6 is provided. The depth d of the notch 30 provided in the fixed-side flange 12 without forming a notch in the surface portion 32. 30 Thus, the operation of press-fitting the studs 26 into the mounting holes 24 and 24 formed in the rotation side flange 13 can be easily performed.
Since other configurations and operations are the same as in the case of the first example described above, a duplicate description is omitted.
[0037]
In addition, when the stud 26 is inserted into the mounting hole 24 provided in the rotation side flange 13 separately from the case of this example, the second notch 35 is formed in a part of the circumferential direction of the head 31 of the stud 26. If the interference between the stud 26 and the outer ring 6 can be prevented only by forming, the notch 30 (FIGS. 4 and 5) does not have to be formed on the outer peripheral surface of the outer ring 6.
[0038]
In each of the above-described examples, the case has been described where the outer surface of the rotation side flange 13 is turned to finish the outer surface to a predetermined shape and size. It is not limited to the case. The present invention can be carried out even when the outer side surface of the rotating flange 13 is finished to a predetermined shape and size by grinding using a grindstone or the like.
[0039]
【The invention's effect】
Since the wheel bearing unit and the manufacturing method thereof according to the present invention are configured and operate as described above, a structure capable of sufficiently suppressing unpleasant noise and vibration generated during braking can be obtained at low cost.
[Brief description of the drawings]
FIG. 1 is a diagram showing a first example of an embodiment of the present invention in a state immediately before one stud is inserted into one mounting hole among a plurality of mounting holes provided in a rotation side flange; 2 is a cross-sectional view taken along line A-O-B.
2 is a view from the right side of FIG. 1, showing a state before a stud is inserted into a mounting hole provided in a rotation side flange.
FIG. 3 is an enlarged view of a portion C in FIG.
FIG. 4 is a view similar to FIG. 1, showing a second example of the embodiment of the present invention.
FIG. 5 is a view similar to FIG. 3, showing a second example.
FIG. 6 is a view showing a stud used in a wheel bearing unit of a second example.
7 is a view from the right side of FIG. 6;
FIG. 8 is a cross-sectional view showing an example of an assembled state of a wheel bearing unit that is an object of the present invention.
[Explanation of symbols]
1 wheel
2 Rotor
3 Knuckles
4 Support holes
5, 5a Wheel bearing unit
6 Outer ring
7 volts
8, 8a, 8b hub
9 Stud
10 nuts
11a, 11b Outer ring raceway
12 Fixed flange
13 Rotating flange
14a, 14b Inner ring raceway
15 Small diameter step
16 Inner ring
17 balls
18 Cage
19a, 19b Seal ring
20 Spline hole
21 Constant velocity joint
22 Spline shaft
23, 23a Rotating member
24 Mounting hole
25 Caulking part
26 Stud
27 Internal space
28 cored bar
29 Encoder
30 notches
31 head
32 Cylindrical surface
33 Male thread
34 Male Serration Club
35 Second cutout

Claims (2)

外周面に車体に固定する為の固定側フランジを、内周面に外輪軌道を、それぞれ有し、使用時にも回転しない外輪と、外周面に内輪軌道を有し、使用時に回転する回転部材と、この内輪軌道と上記外輪軌道との間に設けられた複数個の転動体と、上記回転部材の外端部外周面に設けられて、使用状態でその側面に制動用回転体及び車輪を結合固定する回転側フランジとを備えた車輪用軸受ユニットに於いて、上記回転側フランジの一部に形成された取付孔と、この取付孔に挿入された状態で上記回転側フランジに結合固定されたスタッドと、上記外輪とスタッドとのうちの少なくとも一方の外周面の一部に形成された切り欠きとを備え、上記スタッドは、上記外輪と回転部材と複数の転動体とを組み立てた後、上記回転側フランジの側面を所定の形状及び寸法に加工してから、上記切り欠きを上記スタッド又は外輪の外周面に整合させつつ、上記取付孔の軸方向内端側からこの取付孔に挿入して、上記回転側フランジに結合固定したものである事を特徴とする車輪用軸受ユニット。  A fixed flange for fixing to the vehicle body on the outer peripheral surface, an outer ring raceway on the inner peripheral surface, and an outer ring that does not rotate during use, and a rotating member that has an inner ring raceway on the outer peripheral surface and rotates during use. A plurality of rolling elements provided between the inner ring raceway and the outer ring raceway, and provided on the outer peripheral surface of the outer end portion of the rotating member, and a braking rotator and a wheel are coupled to the side surface in use. In a wheel bearing unit provided with a rotating side flange to be fixed, a mounting hole formed in a part of the rotating side flange, and coupled and fixed to the rotating side flange while being inserted into the mounting hole. A stud and a notch formed in a part of an outer peripheral surface of at least one of the outer ring and the stud, and the stud is assembled after the outer ring, the rotating member, and a plurality of rolling elements are assembled. Place the side of the rotating flange The notch is inserted into the mounting hole from the axially inner end side of the mounting hole while being aligned with the outer peripheral surface of the stud or outer ring, and coupled to the rotating flange. Wheel bearing unit characterized by being fixed. 請求項１に記載した車輪用軸受ユニットの製造方法であって、外輪と回転部材と複数の転動体とを組み立てた後、上記回転部材を上記外輪に対し回転させつつ、制動用回転体及び車輪を結合固定する為の回転側フランジの側面を所定の形状及び寸法に加工してから、切り欠きをスタッド又は外輪の外周面に整合させつつ、このスタッドを上記取付孔の軸方向内端側からこの取付孔に挿入して、上記スタッドを上記回転側フランジに結合固定する、車輪用軸受ユニットの製造方法。  The wheel bearing unit manufacturing method according to claim 1, wherein after the outer ring, the rotating member, and the plurality of rolling elements are assembled, the rotating member and the wheel for braking are rotated while rotating the rotating member with respect to the outer ring. After processing the side surface of the rotation side flange for fixing and fixing to a predetermined shape and size, align the notch with the outer peripheral surface of the stud or outer ring, and connect the stud from the axial inner end side of the mounting hole. A method for manufacturing a wheel bearing unit, wherein the stud is coupled and fixed to the rotation-side flange by being inserted into the mounting hole.
JP2001158952A 2001-05-28 2001-05-28 Wheel bearing unit and manufacturing method thereof Expired - Fee Related JP4696397B2 (en)

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JP4936712B2 (en) * 2005-11-29 2012-05-23 Ｎｔｎ株式会社 Wheel bearing device
JP4943019B2 (en) * 2006-02-24 2012-05-30 Ｎｔｎ株式会社 Manufacturing method of wheel bearing device
JP5088658B2 (en) * 2006-09-25 2012-12-05 株式会社ジェイテクト Hub unit
JP5030082B2 (en) * 2006-08-28 2012-09-19 Ｎｔｎ株式会社 Wheel bearing device
ITTO20121056A1 (en) * 2012-12-07 2014-06-08 Skf Ab FLANGED BEARING RING FOR THE HUB OF THE WHEEL OF A MOTOR VEHICLE
JP2015017674A (en) * 2013-07-11 2015-01-29 日本精工株式会社 Rolling bearing unit for wheel support with seal ring
JP2016027967A (en) 2014-07-10 2016-02-25 株式会社ジェイテクト Hub unit
JP6912860B2 (en) * 2016-02-19 2021-08-04 Ntn株式会社 Bearing device for wheels
WO2017051886A1 (en) 2015-09-25 2017-03-30 Ntn株式会社 Bearing device for vehicle wheel
JP6725993B2 (en) * 2016-02-19 2020-07-22 Ntn株式会社 Wheel bearing device

Family Cites Families (1)

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Publication number Priority date Publication date Assignee Title
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