JP2000234624A - Bearing unit for wheel and manufacture thereof - Google Patents
Bearing unit for wheel and manufacture thereofInfo
- Publication number
- JP2000234624A JP2000234624A JP11038329A JP3832999A JP2000234624A JP 2000234624 A JP2000234624 A JP 2000234624A JP 11038329 A JP11038329 A JP 11038329A JP 3832999 A JP3832999 A JP 3832999A JP 2000234624 A JP2000234624 A JP 2000234624A
- Authority
- JP
- Japan
- Prior art keywords
- wheel
- hub
- mounting flange
- rotating
- peripheral surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Rolling Contact Bearings (AREA)
Abstract
Description
【０００１】[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。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel bearing unit for supporting a wheel of a motor vehicle and a rotating body for braking such as a rotor or a drum, and to an improvement in a method of manufacturing such a wheel bearing unit. .
【０００２】[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４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、静止輪で
ある外輪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。2. Description of the Related Art A wheel 1 constituting a wheel of an automobile and a rotor 2 constituting a disc brake which is a braking device.
Is rotatably supported by a knuckle 3 constituting a suspension device, for example, by a structure as shown in FIG. That is, an outer ring 6 which is a stationary wheel and constitutes a wheel bearing unit 5 to which the present invention is applied is fixed to a 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 connected and fixed to a hub 8 constituting the wheel bearing unit 5 by a plurality of studs 9 and nuts 10.
【０００３】上記外輪６の内周面には、それぞれが静止
側軌道面である複列の外輪軌道１１ａ、１１ｂを、外周
面には結合フランジ１２を、それぞれ形成している。こ
の様な外輪６は、この結合フランジ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。On the inner peripheral surface of the outer race 6, double rows of outer raceways 11a and 11b, each of which is a stationary raceway surface, are formed, and on the outer peripheral surface, a coupling flange 12 is formed. The outer ring 6 is fixed to the knuckle 3 by connecting the connecting flange 12 to the knuckle 3 with the bolts 7.
【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（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、各図の左側。反
対に、自動車への組み付け状態で幅方向中央側となる、
各部の右側を内と言う。）から突出した部分には、取付
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はこの取付フランジ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。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の内端部に形成した小径段部
１５に、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１１
ｂに対向させている。On the other hand, a part of the outer peripheral surface of the hub 8 is an outer end opening of the outer race 6 (the outer part is a part which is outward in the width direction when assembled to an automobile, and On the other hand, when it is assembled to a car, it will be the center in the width direction,
The right side of each part is called inside. A mounting flange 13 is formed at a portion protruding from the portion (1). The wheel 1 and the rotor 2 are connected and fixed to one side surface (outside surface in the illustrated example) of the mounting flange 13 by the studs 9 and the nuts 10. An inner ring raceway 14a is formed on the outer peripheral surface of the intermediate portion of the hub 8 at a portion facing the outer raceway 11a outside the double row outer raceways 11a and 11b. Further, an inner ring 16 is externally fixed to a small-diameter stepped portion 15 formed at the inner end of the hub 8. Then, the inner raceway 14b formed on the outer peripheral surface of the inner race 16 is replaced with the inner raceway 11 of the inner row of the double row outer raceways 11a and 11b.
b.
【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、１
８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の内側に上記ハブ８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を設けた空間と外部空間
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。[0005] Between each of the outer raceways 11a, 11b and each of the inner raceways 14a, 14b, a plurality of balls 17, 17 each of which is a rolling element, is provided with a plurality of cages 18, 1 respectively.
8 so that it can roll freely. With this configuration, a double-row angular contact type ball bearing as a rear combination is formed, and the hub 8 is supported inside the outer ring 6 so as to be rotatable and capable of supporting a radial load and a thrust load. In addition, an inner peripheral surface at both ends of the outer ring 6,
Seal rings 19a, 19b are provided between the outer peripheral surface of the intermediate portion of the hub 8 and the outer peripheral surface of the inner end of the inner ring 16, respectively.
Is provided to block the space in which the balls 17 and 17 are provided from the external space. Further, the illustrated example is a wheel bearing unit 5 for drive wheels (rear wheels of FR and RR vehicles, front wheels of FF vehicles, all wheels of 4WD vehicles). A hole 20 is formed. The spline shaft 22 of the constant velocity joint 21 is inserted into the spline hole 20.
【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４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の取付フランジ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の両側面に押し付ける。When the above-described rolling bearing unit 5 for a wheel is used, as shown in FIG. 4, the outer ring 6 is fixed to the knuckle 3 and the mounting flange 13 of the hub 8 is combined with a tire (not shown). And the rotor 2 is fixed. The rotor 2 is combined with a support and a caliper (not shown) fixed to the knuckle 3 to form a disc brake for braking. At the time of braking, a pair of pads provided so as to sandwich the rotor 2 is pressed against both side surfaces of the rotor 2.
【０００７】[0007]
【発明が解決しようとする課題】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、不可避的な製
造誤差により、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４の左右方向）に振れる事が避け
られない。この様な振れ（図４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。It is known that vibrations accompanied by unpleasant noise, called judder, often occur when a vehicle is braked. There are various known causes of such vibrations, such as uneven friction between the side surface of the rotor 2 and the lining of the pad. However, it is known that the runout of the rotor 2 is also a major cause. Have been. That is, the side surface of the rotor 2 should be at right angles to the center of rotation of the rotor 2, but it is difficult to make it completely at right angles 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 (the left-right direction in FIG. 4) when the vehicle is running. Such shake (the amount of displacement in the horizontal direction in FIG. 4)
Becomes larger, the judder is generated when the lining of a pair of pads is pressed against both side surfaces of the rotor 2 for braking.
【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の側面の軸方向に亙る振れ（アキ
シアル振れ）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
心に対する取付フランジ１３の取付面（上記取付フラン
ジ１３の片側面）の直角度と、この取付面自体の面精度
とを向上させる必要がある。これら直角度及び面精度に
影響を及ぼす要素は、それぞれ複数ずつ存在するが、特
に影響の大きい要素としては、直角度に関しては、上記
取付面と軌道面（外輪軌道１１ａ、１１ｂ及び内輪軌道
１４ａ、１４ｂ）との平行度が、面精度に就いては熱処
理変形がある。又、このうちの平行度を高める為には、
ハブ８の構成各部のうち、上記取付フランジ１３の片側
面と中間部外周面に形成した内輪軌道１４ａ及び内端部
に形成した小径段部１５との位置関係、並びにこれら各
部の形状及び寸法を、精度良く仕上げる事が必要であ
る。このうちの内輪軌道１４ａ及び小径段部１５の形状
及び寸法の精度を、上記取付面との関係で高めれば、こ
の取付面の上記ハブ８の回転中心に対する直角度を向上
させる事ができる。又、上記取付面から熱処理変形を取
り除けば、この取付面の面精度を向上させる事ができ
る。In order to suppress the judder generated due to such a cause, it is important to suppress (improve) the axial runout (axial runout) of the side surface of the rotor 2.
In order to suppress this run-out, it is necessary to improve the perpendicularity of the mounting surface of the mounting flange 13 (one side surface of the mounting flange 13) to the rotation center of the hub 8 and the surface accuracy of the mounting surface itself. is there. There are a plurality of elements each of which influences the squareness and the surface accuracy. Among the elements having a particularly large influence, the squareness and the mounting surface and the raceway surface (the outer raceways 11a and 11b and the inner raceway 14a, Regarding the parallelism with 14b), the surface accuracy is deformed by heat treatment. In order to increase the parallelism,
Among the constituent parts of the hub 8, the positional relationship between one side surface of the mounting flange 13, the inner raceway 14a formed on the outer peripheral surface of the intermediate part and the small-diameter stepped part 15 formed on the inner end, and the shape and dimensions of these parts are described. It is necessary to finish with high accuracy. If the accuracy of the shape and dimensions of the inner raceway 14a and the small-diameter step portion 15 is increased in relation to the mounting surface, the perpendicularity of the mounting surface to the rotation center of the hub 8 can be improved. Further, if the heat treatment deformation is removed from the mounting surface, the surface accuracy of the mounting surface can be improved.
【０００９】ロータ２の振れに結び付く、上記取付フラ
ンジ１３の振れを防止する為の技術としては、例えば特
開平１０−２１７００１号公報に記載されたものがあ
る。但し、この公報に記載された従来技術は、基準面と
して本来必要でない面を精密仕上する為、徒にコストが
嵩むだけでなく、構成各部を熱処理する事に就いての考
慮はなされていない。これに対して、上記内輪軌道１４
ａ及び小径段部１５には、表面を硬化させる為に、高周
波焼き入れ等の熱処理を施す必要がある。そして、これ
ら内輪軌道１４ａ及び小径段部１５の形状及び寸法は、
この様な熱処理に伴って多少なりとも変化する為、上記
公報に記載された従来技術では、上述の様に各部の精度
を十分に向上させる事は難しい。しかも、上記公報に記
載された発明の場合には、ハブの外周面に、それぞれが
このハブとは別体とされた１対の内輪を固定する構造で
ある為、これら各内輪の端面と内輪軌道との誤差等が、
取付フランジの取付面と内輪軌道との平行度の誤差とし
て入り込む。更には、ハブと内輪との当接部を、上記取
付フランジの取付面を基準として加工していない為、上
記取付面と内輪軌道との平行度を十分に向上させる事は
難しい。As a technique for preventing the mounting flange 13 from running, which is linked to the running of the rotor 2, there is a technique described in, for example, Japanese Patent Application Laid-Open No. Hei 10-217001. However, in the prior art described in this publication, since a surface which is not originally required as a reference surface is precisely finished, not only the cost is increased but also no consideration is given to heat treatment of each component. In contrast, the inner raceway 14
In order to harden the surface, heat treatment such as induction hardening or the like needs to be applied to a and the small-diameter stepped portion 15. The shapes and dimensions of the inner raceway 14a and the small-diameter step portion 15 are as follows.
As the heat treatment changes to some extent, it is difficult for the prior art described in the above publication to sufficiently improve the accuracy of each part as described above. In addition, in the case of the invention described in the above publication, a pair of inner rings, each of which is separate from the hub, is fixed to the outer peripheral surface of the hub. Error with the orbit,
It enters as an error in the degree of parallelism between the mounting surface of the mounting flange and the inner raceway. Furthermore, since the contact portion between the hub and the inner race is not machined with reference to the mounting surface of the mounting flange, it is difficult to sufficiently improve the parallelism between the mounting surface and the inner raceway.
【００１０】又、従来から、取付フランジ１３の振れと
ロータ２自体の形状誤差に基づく振れとを相殺する為、
車輪用軸受ユニット５とロータ２とを選択して組み合わ
せたり、或は車輪用軸受ユニット５とロータ２とを組み
合わせた後、このロータ２の側面を加工する等を行なう
場合もあった。ところが、前者の場合には組み合わせの
為の選択作業が面倒になり、後者の場合には加工の為の
機械装置が複雑化、大型化する等、何れもコストが嵩む
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。Conventionally, in order to cancel the runout of the mounting flange 13 and the runout based on the shape error of the rotor 2 itself,
In some cases, the wheel bearing unit 5 and the rotor 2 are selected and combined, or after the wheel bearing unit 5 and the rotor 2 are combined, the side surface of the rotor 2 is processed. However, in the case of the former, the selection work for the combination is troublesome, and in the case of the latter, the mechanical device for the processing becomes complicated, and the size thereof becomes large. The wheel bearing unit and the method of manufacturing the same according to the present invention have been made in view of such circumstances.
【００１１】[0011]
【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、静止側周面に静止側軌道面を有し、使用状態で
懸架装置に支持固定される静止輪と、回転側周面にその
表面を熱処理硬化された回転側軌道面を有する回転輪
と、この回転側軌道面と上記静止側軌道面との間に設け
られた複数個の転動体と、上記回転輪の外周面に設けら
れて、使用状態でその側面に制動用回転体及び車輪を結
合固定する取付フランジを備える。In the wheel bearing unit and the method of manufacturing the same according to the present invention, the wheel bearing unit according to the first aspect of the present invention has a stationary side circumference similar to the above-described conventional wheel bearing unit. A stationary wheel having a stationary raceway surface on its surface and supported and fixed to a suspension device in use; a rotating wheel having a rotating raceway surface whose surface is heat-treated and hardened on the rotating peripheral surface; A plurality of rolling elements provided between the surface and the stationary-side raceway surface; and a mounting flange provided on the outer peripheral surface of the rotating wheel and connecting and fixing the braking rotary body and the wheel to the side surface in use. Is provided.
【００１２】特に、本発明の車輪用軸受ユニットに於い
ては、これら制動用回転体及び車輪を結合固定する為の
取付フランジの側面は、上記回転側軌道面を熱処理した
後に所定の形状に加工されたものである。又、上記回転
側軌道面は、上記取付フランジの側面を所定の形状に加
工した後に、この側面を基準として所定の形状及び寸法
に加工されたものである。In particular, in the wheel bearing unit of the present invention, the side surface of the mounting flange for connecting and fixing the rotating body for braking and the wheel is formed into a predetermined shape after heat treatment of the rotating side raceway surface. It was done. The rotation-side raceway surface is formed by processing a side surface of the mounting flange into a predetermined shape, and then processing the side surface of the mounting flange into a predetermined shape and dimensions based on the side surface.
【００１３】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、上記回転輪のうちで回転側軌道面部
分を熱処理硬化させた後、取付フランジの側面を所定の
形状に加工する。次いで、上記回転側軌道面を、この側
面を基準面として利用する事により、所定の形状及び寸
法に加工する。Further, in the method of manufacturing a bearing unit for a wheel according to a second aspect, after a heat-treating and hardening of a rotating raceway portion of the rotating wheel, the side surface of the mounting flange is processed into a predetermined shape. Next, the rotation-side raceway surface is processed into a predetermined shape and dimensions by using this side surface as a reference surface.
【００１４】[0014]
【作用】上述の様に構成する本発明の車輪用軸受ユニッ
トとその製造方法によれば、熱処理に伴う各部の変形に
関係なく、回転側軌道面と取付フランジの側面との関係
を、正規の関係にできる。この結果、回転輪の回転中心
に対する、この取付フランジの側面の直角度を高くし
て、この取付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。According to the wheel bearing unit and the method of manufacturing the same according to the present invention, the relationship between the rotating side raceway surface and the side surface of the mounting flange can be changed to a regular one regardless of the deformation of each part due to the heat treatment. Can be in a relationship. As a result, the perpendicularity of the side surface of the mounting flange with respect to the rotation center of the rotating wheel can be increased, and the vibration of the braking rotary body fixed to the mounting flange can be suppressed.
【００１５】[0015]
【発明の実施の形態】図１〜２は、本発明の実施の形態
の第１例を示している。静止輪である外輪６の外周面に
は、この外輪６をナックル３（図４）に結合固定する為
の結合フランジ１２を設けている。又、静止側周面であ
る、上記外輪６の内周面には、それぞれが静止側軌道面
である、複列の外輪軌道１１ａ、１１ｂを形成してい
る。これら各外輪軌道１１ａ、１１ｂを含む、上記外輪
６の中間部内周面で図１の上半部に斜格子で示す部分
は、高周波焼き入れにより、全周に亙り硬化させてい
る。1 and 2 show a first embodiment of the present invention. A coupling flange 12 for coupling and fixing the outer ring 6 to the knuckle 3 (FIG. 4) is provided on the outer peripheral surface of the outer ring 6 which is a stationary wheel. Further, on the inner peripheral surface of the outer ring 6 which is a stationary side peripheral surface, double rows of outer ring raceways 11a and 11b each being a stationary side raceway surface are formed. The portion of the inner peripheral surface of the outer race 6 including the outer raceways 11a and 11b, which is indicated by a diagonal lattice in the upper half of FIG. 1, is hardened over the entire periphery by induction hardening.
【００１６】又、回転輪に相当するハブ８と内輪１６と
の外周面で、上記各外輪軌道１１ａ、１１ｂに対向する
部分には、それぞれが回転側軌道面に相当する内輪軌道
１４ａ、１４ｂを設けている。即ち、上記ハブ８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８の内端部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を外嵌固定してい
る。この内輪１６は、ＳＵＪ２の如き軸受鋼等の硬質金
属により造り、心部まで焼き入れ硬化させている。又、
上記ハブ８の中間部外端寄り部分で、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４）或はドラムを
固定する為の取付フランジ１３を設けている。On the outer peripheral surfaces of the hub 8 and the inner race 16 corresponding to the rotating wheels, portions of the outer raceways 11a and 11b opposed to the outer raceways 11a and 11b are respectively provided with inner raceways 14a and 14b corresponding to the rotating raceways. Provided. That is, the inner raceway 14a is formed directly on the outer peripheral surface of the intermediate portion of the hub 8, and the inner race 16 having the inner raceway 14b formed on the outer peripheral surface thereof is formed on the small-diameter step portion 15 formed on the inner end of the hub 8. It is fitted and fixed. The inner ring 16 is made of a hard metal such as bearing steel such as SUJ2, and is hardened and hardened to the core. or,
A portion of the hub 8 near the middle outer end protruding from the outer end opening of the outer ring 6 includes a wheel 1 constituting a wheel.
And a mounting flange 13 for fixing the rotor 2 (FIG. 4) or the drum, which is a rotating body for braking.
【００１７】この取付フランジ１３の円周方向複数個所
で、上記ハブ８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２３を形成し、この取付孔２３
に、それぞれスタッド２４の基端部を内嵌固定してい
る。このスタッド２４は、その基端面に鍔部２５を、中
間部外周面の基端寄り部分にセレーション部２６を、そ
れぞれ形成している。この様なスタッド２４は上記取付
孔２３に、内側から外側（図１の右から左）に挿通し、
上記セレーション部２６を上記取付孔２３に圧入すると
共に、上記鍔部２５を上記取付フランジ１３の内側面に
突き当てる。尚、この様に上記スタッド２４を上記取付
フランジ１３に固定した状態で、図１に鎖線αで示す、
上記セレーション部２６の幅方向中心位置は、同図に鎖
線βで示す、上記取付フランジ１３の厚さ方向中心位置
よりも内方に位置する。この理由は、次の通りである。At a plurality of positions in the circumferential direction of the mounting flange 13, mounting holes 23 are formed on the same circumference centered on the rotation center of the hub 8.
, The base ends of the studs 24 are internally fitted and fixed. The stud 24 has a flange portion 25 formed on the base end surface thereof and a serration portion 26 formed on a portion near the base end of the outer peripheral surface of the intermediate portion. Such a stud 24 is inserted through the mounting hole 23 from inside to outside (from right to left in FIG. 1),
The serrations 26 are press-fitted into the mounting holes 23 and the flanges 25 abut against the inner surface of the mounting flange 13. In this state, the stud 24 is fixed to the mounting flange 13 in this manner, and is indicated by a chain line α in FIG.
The center position in the width direction of the serration portion 26 is located more inward than the center position in the thickness direction of the mounting flange 13 indicated by a chain line β in FIG. The reason is as follows.
【００１８】本例の場合、上記取付フランジ１３の外側
面２７（図１〜２の左側面）を、上記ホイール１及びロ
ータ２を取り付けるべき取付面としている。従って、上
記外側面２７の形状精度が悪化する事を極力防止する必
要がある。これに対して、上記スタッド２４のセレーシ
ョン部２６を上記取付孔２３に圧入すると、上記取付フ
ランジ１３がこの取付孔２３の近傍部分で多少なりとも
変形する。この変形が、上記取付フランジ１３の外側面
２７にまで及び、この外側面が凸方向に変形すると、こ
の外側面に対し結合固定した、上記ロータ２の振れが大
きくなりがちになる。そこで、上記取付孔２３と上記セ
レーション部２６との嵌合部を、極力内方に寄せて設け
る事により、上記変形に基づき上記外側面２７が凸方向
に変形する事がない様にしている。勿論、上記セレーシ
ョン部２６の幅Ｗ26は、十分な嵌合強度を確保できる範
囲で、上記取付フランジ１３の厚さＴ13よりも十分に小
さく（Ｗ26≪Ｔ13）している。図示の例では、上記取付
孔２３の端部で、上記外側面２７側開口部に、座ぐり加
工或は旋削加工等により、面取り状の大径部を形成して
いるので、上記セレーション部２６の圧入に基づく、上
記外側面２７の凸方向への変形を、より確実に防止でき
る。更には、殆ど必要はないと考えられるが、上記セレ
ーション部２６の圧入後、上記外側面２７の加工を再度
行なえば、この外側面２７の歪みを確実になくせる。In the case of the present embodiment, the outer surface 27 (the left side surface in FIGS. 1 and 2) of the mounting flange 13 is a mounting surface on which the wheel 1 and the rotor 2 are mounted. Therefore, it is necessary to prevent the accuracy of the shape of the outer surface 27 from deteriorating as much as possible. On the other hand, when the serration portion 26 of the stud 24 is press-fitted into the mounting hole 23, the mounting flange 13 is slightly deformed in the vicinity of the mounting hole 23. This deformation extends to the outer surface 27 of the mounting flange 13. If the outer surface is deformed in a convex direction, the run-out of the rotor 2 fixed to the outer surface tends to increase. Therefore, by providing the fitting portion between the mounting hole 23 and the serration portion 26 as inwardly as possible, the outer surface 27 is prevented from being deformed in the convex direction due to the deformation. Of course, the width W 26 of the serration portion 26 is sufficiently smaller than the thickness T 13 of the mounting flange 13 (W 26 ≪T 13 ) as long as a sufficient fitting strength can be ensured. In the example shown in the drawing, a large-diameter portion having a chamfered shape is formed at the end of the mounting hole 23 at the opening on the outer surface 27 side by, for example, spot facing or turning. , The deformation of the outer side surface 27 in the convex direction can be more reliably prevented. Further, although it is thought that there is almost no need, if the outer surface 27 is processed again after the press-fitting of the serration portion 26, the distortion of the outer surface 27 can be surely eliminated.
【００１９】又、上記ハブ８の外周面で図１の上半部に
斜格子で示す部分は、高周波焼き入れにより、全周に亙
り硬化させている。このうち、上記取付フランジ１３の
基端部分は、走行時にこの取付フランジ１３に加わる大
きなモーメントに拘らず、この基端部分が塑性変形する
のを防止する為に硬化させる。又、上記内輪軌道１４ａ
部分は、次述する玉１７、１７との当接部に加わる大き
な面圧に拘らず、この内輪軌道１４ａに圧痕が形成され
るのを防止する為に硬化させる。又、上記小径段部１５
は、上記内輪１６から加わる大きなラジアル荷重に拘ら
ず、この小径段部１５が塑性変形するのを防止する為に
硬化させる。更には、この小径段部１５と上記内輪軌道
１４ａとの間部分は、走行時に加わる大きなモーメント
荷重やスラスト荷重に拘らず、この間部分が塑性変形す
るのを防止する為に硬化させる。The portion of the outer peripheral surface of the hub 8 indicated by the oblique lattice in the upper half of FIG. 1 is hardened over the entire periphery by induction hardening. The base end of the mounting flange 13 is hardened to prevent the base end from being plastically deformed irrespective of a large moment applied to the mounting flange 13 during traveling. Also, the inner ring raceway 14a
The portion is hardened in order to prevent the formation of an indentation on the inner raceway 14a irrespective of the large surface pressure applied to the contact portion with the balls 17, 17 described below. Also, the small diameter step 15
Is hardened in order to prevent the small-diameter stepped portion 15 from being plastically deformed irrespective of the large radial load applied from the inner ring 16. Further, the portion between the small-diameter step portion 15 and the inner raceway 14a is hardened in order to prevent the portion from being plastically deformed irrespective of a large moment load or a thrust load applied during traveling.
【００２０】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。この構
成により、前記外輪６の内径側に前記ハブ８を回転自在
に支持し、ナックル３に対してホイール１を含む車輪及
びロータ２を回転自在に支持できる様にする。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、１
７を設けた空間と外部空間とを遮断し、この空間内に封
入したグリースの漏洩防止と、この空間内への異物の進
入防止とを図っている。Between the outer raceways 11a, 11b and the inner raceways 14a, 14b, a plurality of balls 17, 17 each of which is a rolling element, are provided with a cage 18, 18, respectively.
It is provided so that it can roll freely while being held by. With this configuration, the hub 8 is rotatably supported on the inner diameter side of the outer ring 6, and the wheel including the wheel 1 and the rotor 2 can be rotatably supported on the knuckle 3. Seal rings 19a and 19b are provided between the inner peripheral surfaces of both ends of the outer ring 6 and the outer peripheral surface of the intermediate portion of the hub 8 and the inner peripheral portion of the inner ring 16, respectively. , 1
The space in which the space 7 is provided and the external space are shut off to prevent leakage of the grease sealed in the space and to prevent foreign substances from entering the space.
【００２１】上述の様な車輪用軸受ユニット５に於い
て、上記ホイール１及びロータ２を結合固定する為の、
前記取付フランジ１３の外側面２７は、図１の上半部に
斜格子で示した、上記ハブ８の中間部外周面を熱処理の
一種である高周波焼き入れ処理により硬化させた後に、
所定の形状に加工している。即ち、上記斜格子部分に高
周波熱処理を施して、この斜格子部分を硬化させると共
に、上記ハブ８に熱処理に基づく変形が生じた後に、上
記外側面２７に旋削等の機械加工を施し、この外側面２
７を平坦面とする。In the wheel bearing unit 5 as described above, the wheel 1 and the rotor 2 are connected and fixed.
The outer surface 27 of the mounting flange 13 is hardened by an induction hardening process, which is a kind of heat treatment, on the outer peripheral surface of the intermediate portion of the hub 8 shown in the upper half of FIG.
It is processed into a predetermined shape. That is, the oblique lattice portion is subjected to high-frequency heat treatment to harden the oblique lattice portion, and after the hub 8 is deformed based on the heat treatment, the outer surface 27 is subjected to machining such as turning. Side 2
7 is a flat surface.
【００２２】更に、上記ハブ８の中間部外周面に直接形
成した内輪軌道１４ａ、及びこのハブ８の内端部に形成
した小径段部１５の外周面及び段差面は、上記取付フラ
ンジ１３の外側面２７を平坦面に加工した後に、図２に
示す様に、この外側面２７を基準として所定の形状及び
寸法に加工する。即ち、この外側面２７にバッキングプ
レート２８を突き当てると共に、このバッキングプレー
ト２８と上記取付フランジ１３とを、磁気吸着力等によ
り結合させる。そして、このバッキングプレート２８を
回転させる事により上記ハブ８を回転させる。この際、
このハブ８の回転中心は、上記外側面２７に対し直交す
る軸となる。そこで、図示しないシューを上記ハブ８の
外周面に摺接させ、このハブ８のラジアル方向に亙る位
置決めを図りつつ、図２に破線を付した、上記内輪軌道
１４ａと小径段部１５の外周面及び段差面とに、研削加
工或は精密旋削加工の如き、これら各面の形状を所望に
する為の機械加工を施す。Furthermore, the inner raceway 14a formed directly on the outer peripheral surface of the intermediate portion of the hub 8 and the outer peripheral surface and the step surface of the small-diameter step portion 15 formed on the inner end of the hub 8 are outside the mounting flange 13. After processing the side surface 27 into a flat surface, as shown in FIG. 2, the side surface 27 is processed into a predetermined shape and dimensions based on the outer side surface 27. That is, the backing plate 28 is abutted against the outer side surface 27, and the backing plate 28 and the mounting flange 13 are coupled by magnetic attraction or the like. Then, the hub 8 is rotated by rotating the backing plate 28. On this occasion,
The center of rotation of the hub 8 is an axis orthogonal to the outer surface 27. Therefore, a shoe (not shown) is brought into sliding contact with the outer peripheral surface of the hub 8, and the outer peripheral surface of the inner raceway 14a and the small-diameter step portion 15 indicated by a broken line in FIG. And, the step surface is subjected to a machining process such as a grinding process or a precision turning process to make the shape of each surface desired.
【００２３】この様な機械加工は、上記外側面２７に対
し直交する軸を回転中心としつつ行なうので、この外側
面２７と、上記ハブ８の中間部外周面に直接形成した内
輪軌道１４ａ及び上記小径段部１５に外嵌した内輪１６
（図１）の外周面の内輪軌道１４ｂとの位置関係が、上
記高周波焼き入れ処理に基づく熱変形に拘らず、正規な
ものとなる。この結果、図１に示す様な車輪用軸受ユニ
ット５を組み立てた状態で、上記外側面２７の振れを僅
少に抑える事が可能になる。Since such machining is performed while using the axis orthogonal to the outer surface 27 as the center of rotation, the outer surface 27 and the inner raceway 14a formed directly on the outer peripheral surface of the intermediate portion of the hub 8 and the above-mentioned inner ring track 14a are formed. Inner ring 16 externally fitted to small diameter step 15
The positional relationship between the outer peripheral surface of FIG. 1 and the inner raceway 14b is normal regardless of the thermal deformation based on the induction hardening process. As a result, in a state where the wheel bearing unit 5 as shown in FIG. 1 is assembled, it is possible to slightly suppress the runout of the outer side surface 27.
【００２４】次に、図３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８の外周面に設
けた取付フランジ１３の外側面２７を平坦面に仕上げた
後、このハブ８の外端部をチャック３０により把持した
状態で、このハブ８の中間部外周面に直接形成した内輪
軌道１４ａ、及びこのハブ８の内端部に形成した小径段
部１５の外周面及び段差面を、所定の形状及び寸法に加
工する。この際、上記チャック３０の軸方向片面（図３
の右端面）は上記外側面２７に突き当てて、この外側面
２７を加工の為の基準面として利用する。又、上記チャ
ック３０の内周面は、上記ハブ８の外端部に形成した円
筒部３１の外周面に当接させて、このハブ８のラジアル
方向に亙る変位を抑える。この様な本例の場合には、上
記ハブ８の中間部外周面に直接形成した内輪軌道１４ａ
及びこのハブ８の内端部に形成した小径段部１５の外周
面のラジアル方向位置をより厳密に規制できる。この結
果、ホイール１及びロータ２（図４）のラジアル方向に
亙る変位を抑えて、自動車の走行時の振動を抑える事が
できる。その他の構成及び作用は、上述した第１例の場
合と同様であるから、同等部分に関する図示並びに説明
は省略する。FIG. 3 shows a second embodiment of the present invention.
An example is shown. In the case of this example, after finishing the outer surface 27 of the mounting flange 13 provided on the outer peripheral surface of the hub 8 to a flat surface, the outer end portion of the hub 8 is gripped by the chuck 30 and the hub 8 is The inner raceway 14a formed directly on the outer peripheral surface of the intermediate portion, and the outer peripheral surface and the step surface of the small-diameter step portion 15 formed on the inner end of the hub 8 are processed into predetermined shapes and dimensions. At this time, one surface in the axial direction of the chuck 30 (FIG. 3)
(The right end face) is brought into contact with the outer side face 27, and this outer side face 27 is used as a reference plane for processing. The inner peripheral surface of the chuck 30 is brought into contact with the outer peripheral surface of the cylindrical portion 31 formed at the outer end of the hub 8 to suppress the displacement of the hub 8 in the radial direction. In this case, the inner ring raceway 14a formed directly on the outer peripheral surface of the intermediate portion of the hub 8 is used.
In addition, the radial position of the outer peripheral surface of the small-diameter step portion 15 formed at the inner end of the hub 8 can be more strictly regulated. As a result, the displacement of the wheel 1 and the rotor 2 (FIG. 4) in the radial direction can be suppressed, and the vibration of the automobile during traveling can be suppressed. Other configurations and operations are the same as those of the above-described first example, and illustration and description of the equivalent parts are omitted.
【００２５】[0025]
【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の抑制を、特にコストを
高くする事なく行なえる。Since the wheel bearing unit and the method of manufacturing the same according to the present invention are constructed and operated as described above, it is possible to suppress unpleasant noise and vibration generated during braking without increasing the cost. You.
【図１】本発明の実施の形態の第１例を示す断面図。FIG. 1 is a sectional view showing a first example of an embodiment of the present invention.
【図２】第１例でハブの外周面を加工する状態を示す断
面図。FIG. 2 is a sectional view showing a state in which the outer peripheral surface of the hub is machined in the first example.
【図３】本発明の実施の形態の第２例でハブの外周面を
加工する状態を示す断面図。FIG. 3 is a sectional view showing a state in which the outer peripheral surface of the hub is machined in a second example of the embodiment of the present invention.
【図４】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。FIG. 4 is a sectional view showing an example of an assembled state of a wheel bearing unit to which the present invention is applied.
１ ホイール ２ ロータ ３ ナックル ４ 支持孔 ５ 車輪用軸受ユニット ６ 外輪 ７ ボルト ８ ハブ ９ スタッド １０ ナット １１ａ、１１ｂ 外輪軌道 １２ 結合フランジ １３ 取付フランジ 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 取付孔 ２４ スタッド ２５ 鍔部 ２６ セレーション部 ２７ 外側面 ２８ バッキングプレート ２９ 大径部 ３０ チャック ３１ 円筒部 Reference Signs List 1 wheel 2 rotor 3 knuckle 4 support hole 5 wheel bearing unit 6 outer ring 7 bolt 8 hub 9 stud 10 nut 11a, 11b outer ring track 12 connecting flange 13 mounting flange 14a, 14b inner ring track 15 small diameter step 16 inner ring 17 ball 18 holding Containers 19a, 19b Seal ring 20 Spline hole 21 Constant velocity joint 22 Spline shaft 23 Mounting hole 24 Stud 25 Flange 26 Serration part 27 Outer surface 28 Backing plate 29 Large diameter part 30 Chuck 31 Cylindrical part
フロントページの続き (72)発明者 川瀬 安徳 滋賀県大津市晴嵐一丁目16番１号 日本精 工株式会社内 Ｆターム(参考） 3J101 AA02 AA32 AA43 AA54 AA62 BA53 BA77 DA01 FA01 FA44 GA02 GA03 Continued on the front page (72) Inventor Yasunori Kawase 1-16-1 Hararashi, Otsu-shi, Shiga F-term in NSK Ltd. (reference) 3J101 AA02 AA32 AA43 AA54 AA62 BA53 BA77 DA01 FA01 FA44 GA02 GA03
Claims (2)
状態で懸架装置に支持固定される静止輪と、回転側周面
にその表面を熱処理硬化された回転側軌道面を有する回
転輪と、この回転側軌道面と上記静止側軌道面との間に
設けられた複数個の転動体と、上記回転輪の外周面に設
けられて、使用状態でその側面に制動用回転体及び車輪
を結合固定する取付フランジとを備えた車輪用軸受ユニ
ットに於いて、これら制動用回転体及び車輪を結合固定
する為の取付フランジの側面は、上記回転側軌道面を熱
処理した後に所定の形状に加工されたものであり、上記
回転側軌道面は、上記取付フランジの側面を所定の形状
に加工した後に、この側面を基準として所定の形状及び
寸法に加工されたものである事を特徴とする車輪用軸受
ユニット。1. A stationary wheel having a stationary raceway surface on a stationary peripheral surface and supported and fixed to a suspension device in use, and a rotating raceway surface whose surface is heat-hardened on a rotating peripheral surface. A rotating wheel, a plurality of rolling elements provided between the rotating-side raceway surface and the stationary-side raceway surface, and a braking rotary body provided on an outer peripheral surface of the rotating wheel and provided on a side surface thereof in use. And a mounting flange for connecting and fixing the wheel, the side surface of the mounting flange for connecting and fixing the rotating body for braking and the wheel has a predetermined shape after heat-treating the rotating side raceway surface. The rotation-side raceway surface is formed by processing a side surface of the mounting flange into a predetermined shape, and then processing the side surface of the mounting flange into a predetermined shape and dimensions based on the side surface. And bearing unit for wheels.
の製造方法であって、回転輪のうちで回転側軌道面部分
を熱処理硬化させた後、取付フランジの側面を所定の形
状に加工し、次いで、上記回転側軌道面を、この側面を
基準面として利用する事により、所定の形状及び寸法に
加工する、車輪用軸受ユニットの製造方法。2. The method for manufacturing a bearing unit for a wheel according to claim 1, wherein a rotating raceway surface portion of the rotating wheel is heat-treated and hardened, and then a side surface of the mounting flange is processed into a predetermined shape. Then, a method for manufacturing a bearing unit for a wheel, wherein the rotating side raceway surface is processed into a predetermined shape and dimensions by using the side surface as a reference surface.
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11038329A JP2000234624A (en) | 1999-02-17 | 1999-02-17 | Bearing unit for wheel and manufacture thereof |
| DE60031180T DE60031180T2 (en) | 1999-02-17 | 2000-02-14 | Wheel bearing unit and method for its production |
| EP00301105A EP1029709B1 (en) | 1999-02-17 | 2000-02-14 | Bearing unit for wheel and manufacturing method thereof |
| EP04075547A EP1424218B1 (en) | 1999-02-17 | 2000-02-14 | Bearing unit for wheel and manufacturing method thereof |
| DE60042711T DE60042711D1 (en) | 1999-02-17 | 2000-02-14 | Wheel bearing unit and method for its production |
| EP06016921A EP1736326B1 (en) | 1999-02-17 | 2000-02-14 | Bearing unit for wheel and manufacturing method thereof |
| DE60016062T DE60016062T2 (en) | 1999-02-17 | 2000-02-14 | Rolling bearing unit for wheel and method of manufacture |
| US09/505,190 US6523909B1 (en) | 1999-02-17 | 2000-02-16 | Bearing unit for wheel and manufacturing method thereof |
| US10/335,891 US6880898B2 (en) | 1999-02-17 | 2003-01-03 | Bearing unit for wheel and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11038329A JP2000234624A (en) | 1999-02-17 | 1999-02-17 | Bearing unit for wheel and manufacture thereof |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006040417A Division JP4360372B2 (en) | 2006-02-17 | 2006-02-17 | Manufacturing method of wheel bearing unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000234624A true JP2000234624A (en) | 2000-08-29 |
| JP2000234624A5 JP2000234624A5 (en) | 2006-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11038329A Pending JP2000234624A (en) | 1999-02-17 | 1999-02-17 | Bearing unit for wheel and manufacture thereof |
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| Country | Link |
|---|---|
| JP (1) | JP2000234624A (en) |
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| WO2003064185A1 (en) * | 2002-01-30 | 2003-08-07 | Nsk Ltd. | Bearing unit for vehicle wheel |
| WO2003064184A1 (en) * | 2002-01-30 | 2003-08-07 | Nsk Ltd. | Bearing unit for vehicle wheel |
| WO2004067296A1 (en) | 2003-01-29 | 2004-08-12 | Nsk Ltd. | Wheel bearing unit and method of manufacturing the bearing unit |
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| WO2003064185A1 (en) * | 2002-01-30 | 2003-08-07 | Nsk Ltd. | Bearing unit for vehicle wheel |
| US7267487B2 (en) | 2002-10-25 | 2007-09-11 | Nsk Ltd. | Bearing unit for wheel |
| WO2004067296A1 (en) | 2003-01-29 | 2004-08-12 | Nsk Ltd. | Wheel bearing unit and method of manufacturing the bearing unit |
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| JP2007237332A (en) * | 2006-03-08 | 2007-09-20 | Ntn Corp | Brake rotor machining method of bearing unit for drive wheel |
| JP2007308080A (en) * | 2006-05-22 | 2007-11-29 | Jtekt Corp | Manufacturing method of rolling bearing device for wheel |
| JP4661686B2 (en) * | 2006-05-22 | 2011-03-30 | 株式会社ジェイテクト | Manufacturing method of rolling bearing device for wheel |
| JP2008064268A (en) * | 2006-09-11 | 2008-03-21 | Nsk Ltd | Rolling bearing unit for wheel support |
| JP2009083521A (en) * | 2007-09-27 | 2009-04-23 | Jtekt Corp | Bearing device for wheel |
| US8661679B2 (en) | 2007-09-27 | 2014-03-04 | Jtekt Coporation | Bearing device for vehicle and method of manufacturing the same |
| JP2009085254A (en) * | 2007-09-28 | 2009-04-23 | Nsk Ltd | Bearing unit for wheel support and its manufacturing method |
| JP2009191907A (en) * | 2008-02-13 | 2009-08-27 | Ntn Corp | Wheel bearing device |
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