JPH115404A - Wheel supporting hub unit - Google Patents
Wheel supporting hub unitInfo
- Publication number
- JPH115404A JPH115404A JP9158878A JP15887897A JPH115404A JP H115404 A JPH115404 A JP H115404A JP 9158878 A JP9158878 A JP 9158878A JP 15887897 A JP15887897 A JP 15887897A JP H115404 A JPH115404 A JP H115404A
- Authority
- JP
- Japan
- Prior art keywords
- hub
- inner end
- caulking
- raceway
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/0078—Hubs characterised by the fixation of bearings
- B60B27/0084—Hubs characterised by the fixation of bearings caulking to fix inner race
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明に係る車輪支持用ハ
ブユニットは、自動車の駆動輪(FF車の前輪、FR車
及びRR車の後輪、4WD車の全輪)を懸架装置に対し
て回転自在に支持する為に利用する。BACKGROUND OF THE INVENTION A wheel supporting hub unit according to the present invention rotates a driving wheel of an automobile (a front wheel of an FF vehicle, a rear wheel of an FR vehicle and an RR vehicle, and all wheels of a 4WD vehicle) with respect to a suspension system. Use to support freely.
【0002】[0002]
【従来の技術】自動車の車輪は、車輪支持用ハブユニッ
トにより懸架装置に支持する。図4は、米国特許第54
90732号明細書に記載されている。自動車の従動輪
(FF車の後輪、FR車及びRR車の前輪)を懸架装置
に対して支持する為の車輪支持用ハブユニットの1例を
示している。この車輪支持用ハブユニット1は、ハブ2
と、1対の内輪3a、3bと、外輪4と、複数個の転動
体5、5とを備える。このうちの軸部材2の外周面の外
端部(外とは、自動車への組み付け状態で幅方向外寄り
となる側を言い、図4を含む各図の左側となる。反対に
幅方向中央寄りとなる側を内と言い、各図の右側とな
る。)には、車輪を支持する為のフランジ6を形成して
いる。又、このフランジ6の基端部で上記軸部材2の中
央寄り部分には、段部7を形成している。2. Description of the Related Art Wheels of a motor vehicle are supported on a suspension system by wheel supporting hub units. FIG. 4 shows US Pat.
No. 90732. 1 shows an example of a wheel supporting hub unit for supporting driven wheels of an automobile (rear wheels of an FF vehicle, front wheels of an FR vehicle and an RR vehicle) with respect to a suspension device. The hub unit 1 for supporting the wheel includes a hub 2
, A pair of inner races 3a, 3b, an outer race 4, and a plurality of rolling elements 5, 5. Of these, the outer end portion of the outer peripheral surface of the shaft member 2 (the “outside” refers to the side that is shifted outward in the width direction when assembled to an automobile, and is the left side in each of the drawings including FIG. 4. The side closer to the inner side is called the inner side, and is on the right side of each drawing.), A flange 6 for supporting the wheel is formed. A step 7 is formed at the base end of the flange 6 near the center of the shaft member 2.
【0003】上記1対の内輪3a、3bは、上記軸部材
2の中間部から内端部に亙って外嵌し、このうち外側の
内輪3aの外端面を上記段部7の段差面に、内側の内輪
3bの外端面を上記外側の内輪3aの内端面に、それぞ
れ突き当てている。上記軸部材2の内端部には円筒部8
を形成し、この円筒部8の先半部で上記内側の内輪3b
の内端面よりも内方に突出した部分を直径方向外方にか
しめ広げる事により、かしめ部9を形成している。そし
て、このかしめ部9と上記段部7の段差面との間で、上
記1対の内輪3a、3bを挟持している。The pair of inner races 3a and 3b are fitted over the shaft member 2 from the middle part to the inner end, and the outer end surface of the outer inner race 3a is fitted to the step surface of the step part 7. The outer end face of the inner inner ring 3b is abutted against the inner end face of the outer inner ring 3a. A cylindrical portion 8 is provided at the inner end of the shaft member 2.
And the inner half of the inner ring 3b is formed at the first half of the cylindrical portion 8.
The caulking portion 9 is formed by caulking and expanding a portion protruding inward from the inner end face in the radial direction outward. The pair of inner rings 3a and 3b are sandwiched between the caulking portion 9 and the step surface of the step portion 7.
【0004】又、上記外輪4の内周面に設けた1対の
(第一、第二の)外輪軌道10、10と、上記各内輪3
a、3bの外周面に設けた(第一、第二の)内輪軌道1
1、11との間には上記転動体5、5を、それぞれ複数
個ずつ設けている。尚、図示の例では、転動体5、5と
して玉を使用しているが、重量の嵩む自動車用の車輪支
持用ハブユニットの場合には、これら転動体としてテー
パころを使用する場合もある。又、前記フランジ6寄り
の(第一の)内輪軌道は、上記軸部材2の外周面に直接
形成して、外側の内輪3aを省略する場合もある。この
場合に上記段部7は、図4に示した外側の内輪3aの内
方に相当する位置に形成する。上述の様な車輪支持用ハ
ブユニット1を自動車に組み付けるには、上記外輪4の
外周面に形成した外向フランジ状の取付部12により、
この外輪4を懸架装置に固定し、上記フランジ6に車輪
を固定する。この結果、この車輪を懸架装置に対し回転
自在に支持する事ができる。A pair of (first and second) outer raceways 10 and 10 provided on the inner peripheral surface of the outer race 4 and each of the inner races 3 are provided.
(1st, 2nd) inner ring track 1 provided on the outer peripheral surface of a, 3b
A plurality of the rolling elements 5, 5 are provided between the rolling elements 1 and 11, respectively. Although balls are used as the rolling elements 5 and 5 in the illustrated example, tapered rollers may be used as these rolling elements in the case of a wheel supporting hub unit for a heavy automobile. In some cases, the (first) inner raceway near the flange 6 is formed directly on the outer peripheral surface of the shaft member 2 and the outer inner race 3a is omitted. In this case, the step 7 is formed at a position corresponding to the inside of the outer inner ring 3a shown in FIG. In order to assemble the wheel supporting hub unit 1 as described above to an automobile, an outward flange-shaped mounting portion 12 formed on the outer peripheral surface of the outer ring 4 is used.
The outer ring 4 is fixed to a suspension device, and the wheel is fixed to the flange 6. As a result, the wheels can be rotatably supported by the suspension device.
【0005】これに対して、図5は、上述の様なハブに
対して内輪を抑え付ける為のかしめ部を形成した構造
を、自動車の駆動輪を懸架装置に対して支持する為の車
輪支持用ハブユニットに適用したものである。この図5
に示した駆動輪用の車輪支持用ハブユニット1aの場合
には、ハブ13を円筒状に形成すると共に、このハブ1
3の内周面に雌スプライン部14を形成している。そし
て、この雌スプライン部14に、後述する等速ジョイン
ト15と共に駆動部材を構成し、外周面に雄スプライン
部を形成した駆動軸16を挿入している。そして、上記
駆動軸16の先端部に螺合したナット17の内端面を上
記ハブ13の外端面に、上記駆動軸16の基端部に形成
した段部18の段差面19を上記ハブ13の内端部に形
成したかしめ部9の内端面に、それぞれ当接させた状態
で上記ナット17を緊締する事により、上記ハブ13と
上記駆動軸16とを結合している。On the other hand, FIG. 5 shows a structure in which a caulking portion for holding the inner ring against the hub as described above is formed, and a wheel support for supporting the driving wheels of the automobile to the suspension system. This is applied to a hub unit for use. This figure 5
In the case of the wheel supporting hub unit 1a for driving wheels shown in FIG.
3, a female spline portion 14 is formed on the inner peripheral surface. A drive member is formed in the female spline portion 14 together with a constant velocity joint 15 described later, and a drive shaft 16 having a male spline portion formed on the outer peripheral surface is inserted. Then, the inner end surface of the nut 17 screwed to the distal end of the drive shaft 16 is provided on the outer end surface of the hub 13, and the step surface 19 of the step 18 formed on the base end of the drive shaft 16 is provided on the hub 13. The hub 13 and the drive shaft 16 are connected by tightening the nuts 17 in a state of being in contact with the inner end surfaces of the caulking portions 9 formed at the inner end portions.
【0006】尚、図5に示した駆動輪用の車輪支持用ハ
ブユニット1aの場合、上述の図4に示した従動輪用の
車輪支持用ハブユニット1の場合と異なり、ハブ13に
は外側の内輪3aを省略して、1対の内輪軌道11、1
1のうち外側の内輪軌道11は、このハブ13の外周面
に直接形成している。従って、前記段部7は、上記ハブ
13の内端部に形成している。又、上記ハブ13と駆動
軸16とを結合すべく、この駆動軸16をハブ13の内
側に挿通する際に、上記ハブ13の内端部内周面と上記
駆動軸の内端部外周面とが干渉しない様にする為、これ
ら両周面同士の間には全周に亙り隙間を形成している。
上述の様な駆動輪用の車輪支持用ハブユニット1aは、
上述した従動輪用の車輪支持用ハブユニット1と同様、
外輪4に設けた取付部12により懸架装置に固定する。
そして、自動車の走行時には、等速ジョイント15を介
して上記駆動軸16を回転駆動し、この回転駆動力によ
り上記ハブ13のフランジ6に固定した車輪を回転させ
る。The hub unit 1a for supporting wheels for driving wheels shown in FIG. 5 is different from the hub unit 1 for supporting wheels for driven wheels shown in FIG. Is omitted, and a pair of inner raceways 11, 1
The inner raceway 11 of the outer ring 1 is formed directly on the outer peripheral surface of the hub 13. Therefore, the step 7 is formed at the inner end of the hub 13. In order to connect the hub 13 and the drive shaft 16, when the drive shaft 16 is inserted inside the hub 13, the inner peripheral surface of the inner end of the hub 13 and the outer peripheral surface of the inner end of the drive shaft are In order not to interfere with each other, a gap is formed over the entire circumference between these two peripheral surfaces.
The wheel supporting hub unit 1a for driving wheels as described above is
Similar to the wheel supporting hub unit 1 for the driven wheel described above,
It is fixed to a suspension device by a mounting portion 12 provided on the outer race 4.
When the vehicle is running, the drive shaft 16 is rotationally driven via the constant velocity joint 15, and the wheel fixed to the flange 6 of the hub 13 is rotated by the rotational driving force.
【0007】[0007]
【発明が解決しようとする課題】ところが、図5に示し
た駆動輪用の車輪支持用ハブユニット1aの場合、上述
の様にハブ13と駆動軸16とを、ナット17の螺合・
緊締に基づいて結合すると、かしめ部9の内端面と上記
駆動軸16の基端部に形成した段部18の段差面19と
が全周に亙り線接触する。即ち、図6に詳示する様に、
上記かしめ部9の内端面の形状は、このかしめ部9を形
成すべく、上記ハブ13の内端部に形成した円筒部8の
内端部を直径方向外方に折り曲げる事に伴い、凸曲面に
なっている。従って、上述の様にナット17を螺合・緊
締した場合には、上記かしめ部9の内端面に形成された
凸曲面の頂部20と上記段差面19とが全周に亙り当接
し、これらかしめ部9の内端面と段差面19とが線接触
する。However, in the case of the wheel supporting hub unit 1a for driving wheels shown in FIG. 5, the hub 13 and the driving shaft 16 are screwed together with the nut 17 as described above.
When the connection is performed based on the tightening, the inner end surface of the caulked portion 9 and the step surface 19 of the step portion 18 formed at the base end portion of the drive shaft 16 are in line contact over the entire circumference. That is, as shown in detail in FIG.
The shape of the inner end surface of the caulked portion 9 is formed by bending the inner end of the cylindrical portion 8 formed at the inner end of the hub 13 radially outward to form the caulked portion 9. It has become. Therefore, when the nut 17 is screwed and tightened as described above, the top 20 of the convex curved surface formed on the inner end face of the caulking portion 9 and the step surface 19 abut on the entire circumference, and these caulking are performed. The inner end surface of the portion 9 and the step surface 19 are in line contact.
【0008】この様にかしめ部9の内端面と段差面19
とが線接触する場合、上記ナット17の緊締力に基づい
て上記かしめ部9の内端面に加えられる面圧が非常に大
きくなる。上記かしめ部9には、このかしめ部9を形成
する必要上、焼入れ等の硬化処理が施されていない為、
上述の様に大きな面圧が加わった場合には、上記かしめ
部9が塑性変形し易い。この様にかしめ部9が塑性変形
した場合には、上記駆動軸16の先端部に螺合・緊締し
たナット17が緩む可能性がある。上述の様な原因によ
る上記かしめ部9の塑性変形を防止すべく、上記駆動軸
16の段差面19に上記かしめ部9が進入自在な円環状
の凹溝を形成し、この段差面19と内輪3bの内端面と
を直接当接させる事も考えられるが、この場合には、等
速ジョイント15の段部18の形状が複雑になる事に伴
い、この等速ジョイントの製造コストが嵩む為、好まし
くない。本発明の車輪支持用ハブユニットは、この様な
事情に鑑みて、等速ジョイント15の形状を複雑にする
事なく、上記かしめ部の変形を防止すべく発明したもの
である。As described above, the inner end surface of the caulked portion 9 and the step surface 19
When a line contact is made, the surface pressure applied to the inner end surface of the caulked portion 9 based on the tightening force of the nut 17 becomes extremely large. Since the caulked portion 9 is not subjected to hardening treatment such as quenching due to the necessity of forming the caulked portion 9,
When a large surface pressure is applied as described above, the caulked portion 9 is easily plastically deformed. When the caulking portion 9 is plastically deformed in this manner, the nut 17 screwed and tightened to the tip of the drive shaft 16 may be loosened. In order to prevent plastic deformation of the caulked portion 9 due to the above-described causes, an annular concave groove into which the caulked portion 9 can enter is formed on the stepped surface 19 of the drive shaft 16, and the stepped surface 19 and the inner ring are formed. Although it is conceivable to directly contact the inner end surface of the constant velocity joint 3b, in this case, since the shape of the step portion 18 of the constant velocity joint 15 becomes complicated, the manufacturing cost of this constant velocity joint increases. Not preferred. In view of such circumstances, the wheel supporting hub unit of the present invention has been invented to prevent deformation of the caulked portion without complicating the shape of the constant velocity joint 15.
【0009】[0009]
【課題を解決するための手段】本発明の車輪支持用ハブ
ユニットは、前述の図5に示した従来の車輪支持用ハブ
ユニットと同様に、等速ジョイントと共に駆動部材を構
成する駆動軸により、使用時に回転駆動されるハブと、
このハブの外端部外周面に設けられ、このハブに車輪を
支持固定する為のフランジと、上記ハブの中間部外周面
に、直接又はこのハブとは別体の内輪を介して形成した
第一の内輪軌道と、上記ハブの内端部に形成された、こ
の第一の内輪軌道を形成した部分よりも外径寸法が小さ
くなった段部と、外周面に第二の内輪軌道を形成して上
記段部に外嵌された内輪と、内周面に上記第一の内輪軌
道に対向する第一の外輪軌道及び上記第二の内輪軌道に
対向する第二の外輪軌道を有し、使用時に回転しない外
輪と、この外輪を懸架装置に取り付けるべく、この外輪
の外周面に設けられた取付部と、上記第一、第二の内輪
軌道と上記第一、第二の外輪軌道との間に、それぞれ複
数個ずつ設けられた転動体とを備える。そして、上記段
部に外嵌した内輪は、上記ハブの内端部でこの段部に外
嵌した内輪よりも突出した部分に形成した円筒部を直径
方向外方にかしめ広げて形成したかしめ部により上記段
部の段差面に向け抑え付けた状態で、上記ハブに結合固
定している。又、上記ハブは、外端面を上記駆動軸の先
端部に螺合したナットの内端面に、上記かしめ部の内端
面を上記駆動軸の内端部に形成した段部の段差面に、そ
れぞれ当接させた状態で上記ナットを緊締する事によ
り、上記駆動軸に結合固定している。The hub unit for supporting a wheel according to the present invention comprises a driving shaft which forms a driving member together with a constant velocity joint, similarly to the conventional hub unit for supporting a wheel shown in FIG. A hub that is rotated when used,
A flange provided on the outer peripheral surface of the outer end portion of the hub for supporting and fixing wheels to the hub, and a second flange formed on the outer peripheral surface of the intermediate portion of the hub directly or through an inner ring separate from the hub. One inner raceway, a step formed at the inner end of the hub, the outer diameter of which is smaller than the portion forming the first inner raceway, and a second inner raceway on the outer peripheral surface An inner ring that is externally fitted to the step portion, and a first outer ring raceway facing the first inner raceway and a second outer raceway facing the second inner raceway on the inner peripheral surface, An outer ring that does not rotate during use, a mounting portion provided on the outer peripheral surface of the outer ring, and the first and second inner raceways and the first and second outer raceways to mount the outer race on a suspension device. A plurality of rolling elements are provided between them. The inner ring externally fitted to the step portion is formed by caulking and expanding a cylindrical portion formed at the inner end of the hub at a portion protruding from the inner ring externally fitted to the step portion in a radially outward direction. Thus, it is fixed to the hub in a state where it is pressed toward the step surface of the step portion. Further, the hub has an outer end face on an inner end face of a nut screwed to the tip end of the drive shaft, and an inner end face of the caulked portion on a step face of a step formed on the inner end of the drive shaft. The nut is tightened in the abutted state, so that the nut is connected and fixed to the drive shaft.
【0010】特に、本発明の車輪支持用ハブユニットに
於いては、上記駆動軸の内端部に形成した段部の段差面
と当接する部分である上記かしめ部の内端面には、上記
駆動軸の内端部に形成した段部の段差面と面接触自在な
平坦面を設けている。更に好ましくは、少なくともこの
平坦面の一部(外周寄り部)を、上記ハブの段部に外嵌
した内輪の内周面よりも直径方向外方に位置させる。[0010] In particular, in the wheel supporting hub unit of the present invention, the drive end is provided on the inner end surface of the caulked portion which is in contact with the step surface of the step formed on the inner end of the drive shaft. A flat surface is provided on the inner end of the shaft, the surface being freely contactable with the step surface of the step portion. More preferably, at least a part of the flat surface (the portion closer to the outer periphery) is positioned diametrically outward from the inner peripheral surface of the inner race fitted to the step of the hub.
【0011】[0011]
【作用】上述の様に構成する本発明の車輪支持用ハブユ
ニットにより、懸架装置に対して車輪を回転自在に支持
する作用自体は、前述の図4〜5に示した従来の車輪支
持用ハブユニットと同様である。特に、本発明の車輪支
持用ハブユニットによれば、この車輪支持用ハブユニッ
トを構成するハブと駆動部材を構成する駆動軸とを、こ
の駆動軸の先端部に設けたナットの螺合・緊締に基づき
結合した場合に、かしめ部の内端面と駆動軸の基端部に
形成した段部の段差面とが面接触する。従って、上記ナ
ットの緊締力に基づいて上記かしめ部の内端面に加えら
れる面圧を、小さくできる。The operation of the wheel supporting hub unit of the present invention configured as described above to rotatably support the wheel with respect to the suspension device itself is the same as the conventional wheel supporting hub shown in FIGS. Same as unit. In particular, according to the wheel supporting hub unit of the present invention, the hub constituting the wheel supporting hub unit and the driving shaft constituting the driving member are screwed and tightened with the nut provided at the tip of the driving shaft. In this case, the inner end surface of the caulked portion comes into surface contact with the step surface of the step formed at the base end of the drive shaft. Therefore, the surface pressure applied to the inner end surface of the caulked portion based on the tightening force of the nut can be reduced.
【0012】更に、上記かしめ部の内端面に形成する平
坦面の少なくとも一部(外周寄り部)を、上記ハブの段
部に外嵌した内輪の内周面よりも直径方向外方に位置さ
せた場合には、上記ナットの緊締に基づいて上記かしめ
部に加えられる軸方向荷重により、上記かしめ部の外周
寄り部分で上記平坦面を形成した部分を、内輪の内端面
と上記段差面との間で軸方向に亙り挟持する。この状態
で上記かしめ部の外周寄り部分には、圧縮荷重のみが加
わる為、上記軸方向荷重を効果的に支承できる。この
為、上記かしめ部の内端面にナットの緊締に基づいて大
きな軸方向荷重が加えられた場合でも、このかしめ部が
塑性変形する事は殆どない。尚、上述の様にかしめ部の
内端面に形成する平坦面の一部を、ハブの段部に外嵌し
た内輪の内周面よりも直径方向外方に位置させる事な
く、この平坦面の全体を上記内輪の内周面よりも直径方
向内方に位置させた場合には、上記ナットの緊締に基づ
き上記ハブの内端部に曲げ応力が発生する。そして、こ
の曲げ応力に基づいて、このハブの内端部に形成したか
しめ部が塑性変形する可能性がある。この為、本発明を
実施する場合に好ましくは、上記平坦面の少なくとも一
部を上記内輪の内周面(内輪の内端開口部に面取りが存
在する場合には、更にこの面取り)よりも直径方向外方
に位置させて、上記ハブの内端部に曲げ応力が発生する
事を防止し、この内端部に軸方向に亙る圧縮応力のみが
負荷される様にする。この様な好ましい構造を採用すれ
ば、上記かしめ部による内輪の抑え強度が低下したり、
或はハブの先端部に螺合・緊締したナットが緩む事はな
い。この為、信頼性の高い車輪支持用ハブユニットを提
供できる。Further, at least a part of the flat surface formed on the inner end surface of the caulked portion (outer peripheral portion) is positioned diametrically outward of the inner peripheral surface of the inner race fitted to the step of the hub. In this case, the portion where the flat surface is formed at the portion closer to the outer periphery of the caulked portion by the axial load applied to the caulked portion based on the tightening of the nut is formed between the inner end surface of the inner race and the step surface. Between them in the axial direction. In this state, only the compressive load is applied to the outer peripheral portion of the caulked portion, so that the axial load can be effectively supported. Therefore, even when a large axial load is applied to the inner end surface of the caulked portion based on the tightening of the nut, the caulked portion hardly undergoes plastic deformation. Note that, as described above, a part of the flat surface formed on the inner end surface of the caulked portion is not positioned diametrically outward than the inner peripheral surface of the inner ring fitted to the step portion of the hub, and this flat surface is When the entirety is positioned diametrically inward from the inner peripheral surface of the inner race, bending stress is generated at the inner end of the hub due to the tightening of the nut. Then, based on the bending stress, the swaged portion formed at the inner end of the hub may be plastically deformed. For this reason, when practicing the present invention, it is preferable that at least a part of the flat surface has a diameter larger than the inner peripheral surface of the inner race (if the inner end opening of the inner race has a chamfer, the chamfer is further formed). The hub is located outward in the direction to prevent a bending stress from being generated at the inner end of the hub, so that only an axial compressive stress is applied to the inner end. If such a preferable structure is adopted, the holding strength of the inner ring by the caulked portion is reduced,
Alternatively, the nut that is screwed and tightened to the tip of the hub does not come loose. Therefore, a highly reliable wheel supporting hub unit can be provided.
【0013】[0013]
【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。尚、本発明の特徴は、ハブ13
aに対して内輪3bを抑え付ける為のかしめ部9aが、
このハブ13aの先端部の雄ねじ部に螺合したナット1
7の緊締に基づく軸方向荷重に基づいて塑性変形しない
様にすべく、上記かしめ部9aの形状を工夫した点にあ
る。その他の部分の構造及び作用に就いては、前述の図
5に示した従来構造と同様であるから、重複する説明を
省略若しくは簡略にし、以下、本発明の特徴部分を中心
に説明する。1 and 2 show a first embodiment of the present invention. The feature of the present invention is that the hub 13
The caulking portion 9a for holding down the inner ring 3b with respect to a
Nut 1 screwed into the male thread at the tip of hub 13a
The point is that the shape of the caulking portion 9a is devised so as not to be plastically deformed based on the axial load based on the tightening of the step 7. The structure and operation of the other parts are the same as those of the conventional structure shown in FIG. 5 described above. Therefore, duplicate description will be omitted or simplified, and the following description will focus on features of the present invention.
【0014】上記ハブ13aの内端部に内輪3bを結合
固定すべく、このハブ13aの内端部に形成したかしめ
部9aの内端面には、コイニング加工或は旋削加工等を
施す事により、上記ハブ13aの中心軸に対して垂直
な、円輪状の平坦面21を形成している。この様な円輪
状の平坦面21は、少なくともこの平坦面21の一部
(外周寄り部分)を、上記ハブ13aの段部7に外嵌し
た上記内輪3bの内周面よりも直径方向外方に位置させ
た状態で形成する。更に好ましくは、上記平坦面21
と、上記内輪3bの内端面に形成した平坦面23とを、
軸方向に亙り互いに重畳させる。尚、これら両平坦面2
1、23は、互いに平行にする。そして、上記ハブ13
aと、等速ジョイント15と共に駆動部材を構成する駆
動軸16とを結合する場合には、上記かしめ部9aの内
端面である円輪状の平坦面21に、上記駆動軸16の基
端部、言い換えれば上記等速ジョンイント15の肩部に
形成した段部18の段差面19を突き当てる。そして、
この状態で、上記駆動軸16の先端部の雄ねじ部に螺合
したナット17を緊締する事により、これらナット17
と段部18との間で上記ハブ13aを挟持する。In order to couple and fix the inner race 3b to the inner end of the hub 13a, the inner end face of the caulking portion 9a formed at the inner end of the hub 13a is subjected to coining or turning. An annular flat surface 21 perpendicular to the center axis of the hub 13a is formed. Such an annular flat surface 21 has at least a part (a portion closer to the outer periphery) of the flat surface 21 diametrically outer than the inner peripheral surface of the inner ring 3b fitted to the step portion 7 of the hub 13a. It is formed in the state where it is located at. More preferably, the flat surface 21
And a flat surface 23 formed on the inner end surface of the inner ring 3b,
They overlap one another in the axial direction. In addition, these two flat surfaces 2
1, 23 are parallel to each other. And the hub 13
a and a drive shaft 16 that constitutes a drive member together with the constant velocity joint 15, the base end of the drive shaft 16 is attached to a flat annular surface 21 that is the inner end surface of the caulking portion 9 a. In other words, the stepped surface 19 of the step 18 formed on the shoulder of the constant velocity John Int 15 is abutted. And
In this state, the nut 17 screwed to the male screw portion at the tip end of the drive shaft 16 is tightened, so that the nut 17
The hub 13a is sandwiched between the step 13 and the step portion 18.
【0015】上述の様に構成される本例の車輪支持用ハ
ブユニットにより、懸架装置に対して車輪を回転自在に
支持する作用自体は、前述の図5に示した従来の車輪支
持用ハブユニット1aと同様である。特に、本例の車輪
支持用ハブユニットの場合、上述の様にハブ13aと駆
動軸16とを結合した状態では、かしめ部9aの内端面
と上記駆動軸16の基端部に形成した段部18の段差面
19とが全周に亙り面接触する。従って、上記ナット1
7の緊締力に基づいて上記かしめ部9aの内端面に加え
られる面圧を小さくできる。更に、上記ナット17の緊
締に基づいて上記かしめ部9aに加えられる軸方向荷重
を、上記円輪状の平坦面21のうちの上記内輪3bの内
周面よりも直径方向外方に存在する部分を、焼入れ等に
よる硬化処理を施された上記内輪3bの内端面に形成し
た平坦面23と上記段差面19との間で挟持する事によ
り、効果的に支承できる。この為、上記かしめ部9a
に、上記ナット17の緊締に基づいて大きな軸方向荷重
が加えられた場合でも、このかしめ部9aが塑性変形す
る事は殆どない。従って、かしめ部9aによる内輪3b
の抑え強度が低下したり、上記ハブ13aの先端部に螺
合・緊締したナット17が緩む事はない。この結果、信
頼性の高い車輪支持用ハブユニットを提供できる。The function of supporting the wheel rotatably with respect to the suspension device by the wheel supporting hub unit of the present embodiment configured as described above is the same as the conventional wheel supporting hub unit shown in FIG. Same as 1a. Particularly, in the case of the wheel supporting hub unit of the present embodiment, when the hub 13a and the drive shaft 16 are coupled as described above, the step formed on the inner end surface of the caulking portion 9a and the base end of the drive shaft 16 is performed. The stepped surface 19 of 18 comes into surface contact over the entire circumference. Therefore, the nut 1
7, the surface pressure applied to the inner end face of the caulked portion 9a can be reduced. Further, the axial load applied to the caulked portion 9a based on the tightening of the nut 17 is applied to the portion of the annular flat surface 21 that is located diametrically outward from the inner peripheral surface of the inner ring 3b. By sandwiching between the flat surface 23 formed on the inner end surface of the inner ring 3b that has been subjected to hardening treatment such as quenching and the step surface 19, the bearing can be effectively supported. For this reason, the caulking portion 9a
Even when a large axial load is applied due to the tightening of the nut 17, the caulked portion 9a hardly undergoes plastic deformation. Therefore, the inner ring 3b by the caulking portion 9a
Of the hub 13a, and the nut 17 screwed and tightened to the tip of the hub 13a is not loosened. As a result, a highly reliable wheel supporting hub unit can be provided.
【0016】尚、上述の円輪状の平坦面21のうち、上
記内輪3bの内周面よりも直径方向外方に位置させる部
分(円輪状の平坦面21の外周寄り部分)は、上記ナッ
ト17の緊締に基づいて上記かしめ部9aに加えられる
軸方向荷重をより効果的に支承すべく、できるだけ大き
く形成する事が好ましい。この為、本例の場合には、上
記円輪状の平坦面21のうち、内周寄りの一部を除く大
部分を、上記内輪3bの内周面よりも直径方向外方に位
置させている。又、本例の車輪支持用ハブユニットの場
合も、前述の図4に示した従来の車輪支持用ハブユニッ
ト1の場合と同様、上記ハブ13aの外周面に設ける外
側の内輪軌道11(第一の内輪軌道)は、このハブ13
aの中間部外周面に直接形成する代わりに、別体の内輪
3a(図3参照)を介して形成しても良い。The portion of the above-mentioned annular flat surface 21 that is located diametrically outward from the inner peripheral surface of the inner ring 3b (the portion of the annular flat surface 21 closer to the outer periphery) is the nut 17 In order to more effectively support the axial load applied to the caulked portion 9a based on the tightening of the above, it is preferable to form as large as possible. For this reason, in the case of this example, most of the above-mentioned annular flat surface 21 except for a part close to the inner periphery is located radially outward of the inner peripheral surface of the inner ring 3b. . Also, in the case of the wheel supporting hub unit of the present embodiment, similarly to the case of the conventional wheel supporting hub unit 1 shown in FIG. 4, the outer inner raceway 11 (the first inner raceway 11) provided on the outer peripheral surface of the hub 13a. Inner ring track) of the hub 13
Instead of being formed directly on the outer peripheral surface of the intermediate portion of a, it may be formed via a separate inner ring 3a (see FIG. 3).
【0017】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13aの内端部
でこのハブ13aに外嵌した内輪3bの内端面よりも内
方に突出した部分に、スぺーサリング22を外嵌してい
る。そして、上記ハブ13aの内端部で上記スぺーサリ
ング22の内側に存在する円筒部8を直径方向外方にか
しめ広げる事により、上記スぺーサリング22を上記内
輪3bの内端面に向け抑え付けて、この内輪3bを上記
ハブ13aに結合固定している。本例の場合、この様な
スぺーサリング22を設ける事により、上記円筒部8を
かしめ広げる際のかしめ強度を十分に大きくした場合で
も、上記内輪3bが直径方向外方に弾性変形する事を防
止している。FIG. 3 shows a second embodiment of the present invention.
An example is shown. In the case of this example, the spacer ring 22 is externally fitted to a portion of the inner end of the hub 13a projecting inward from the inner end surface of the inner ring 3b externally fitted to the hub 13a. Then, the cylindrical portion 8 existing inside the spacer ring 22 at the inner end portion of the hub 13a is diametrically outwardly expanded to hold the spacer ring 22 toward the inner end surface of the inner ring 3b. The inner ring 3b is fixedly connected to the hub 13a. In the case of this example, by providing such a spacer ring 22, even when the caulking strength when caulking and expanding the cylindrical portion 8 is sufficiently increased, the inner ring 3 b is elastically deformed radially outward. Preventing.
【0018】即ち、本例の場合には、上記円筒部8をか
しめ広げる際に加わる直径方向外方に向いた力は、ハブ
13aに外嵌したスぺーサリング22が受ける。従っ
て、上記円筒部8をかしめ広げる作業に伴って、上記内
輪3bの直径が変化する事を防止できる。尚、本例の場
合、ナット17(図1)の緊締に基づいてかしめ部9a
に加えられる軸方向荷重は、このかしめ部9aの内端面
に形成した円輪状の平坦面21のうちの上記内輪3bの
内周面よりも直径方向外方に存在する部分と、焼入れ等
による硬化処理を施された上記スぺーサリング22の内
端面との間部分で効果的に支承する。スぺーサリング2
2を設けた点以外の構成及び作用は、上述した第1例の
場合と同様である。That is, in the case of this embodiment, the radially outward force applied when the cylindrical portion 8 is swaged is received by the spacer ring 22 fitted to the hub 13a. Therefore, it is possible to prevent the diameter of the inner ring 3b from changing with the work of caulking and widening the cylindrical portion 8. In the case of this example, the swaged portion 9a is formed based on the tightening of the nut 17 (FIG. 1).
Of the annular flat surface 21 formed on the inner end surface of the caulked portion 9a, the portion existing diametrically outward from the inner peripheral surface of the inner ring 3b, and hardening due to quenching or the like. The spacer is effectively supported at a portion between the spacer and the inner end surface of the treated spacer 22. Spacer 2
The configuration and operation other than the provision of 2 are the same as those of the first example described above.
【0019】[0019]
【発明の効果】本発明の車輪支持用ハブユニットは、以
上に述べた通り構成され作用するので、ハブに対して内
輪を抑え付ける為のかしめ部が、ナットの緊締に基づい
て塑性変形する事を防止して、このナットが緩む事を防
止できる。この為、信頼性の高い車輪支持用ハブユニッ
トを提供できる。Since the wheel supporting hub unit of the present invention is constructed and operates as described above, the caulking portion for holding down the inner ring against the hub is plastically deformed based on the tightening of the nut. To prevent the nut from loosening. Therefore, a highly reliable wheel supporting hub unit can be provided.
【図1】本発明の実施の形態の第1例を示す半部断面
図。FIG. 1 is a half sectional view showing a first example of an embodiment of the present invention.
【図2】図1の要部拡大図。FIG. 2 is an enlarged view of a main part of FIG.
【図3】本発明の実施の形態の第2例を示す、図2と同
様の図。FIG. 3 is a view similar to FIG. 2, showing a second example of the embodiment of the present invention;
【図4】従来構造の第1例として、従動輪用の車輪支持
用ハブユニットを示す断面図。FIG. 4 is a sectional view showing a wheel supporting hub unit for a driven wheel as a first example of a conventional structure.
【図5】従来構造の第2例として、本発明の対象となる
駆動輪用の車輪支持用ハブユニットを示す断面図。FIG. 5 is a cross-sectional view showing a wheel supporting hub unit for driving wheels according to a second embodiment of the present invention.
【図6】図5のA部拡大図。FIG. 6 is an enlarged view of a portion A in FIG. 5;
1、1a 車輪支持用ハブユニット 2 ハブ 3a、3b 内輪 4 外輪 5 転動体 6 フランジ 7 段部 8 円筒部 9、9a かしめ部 10 外輪軌道 11 内輪軌道 12 取付部 13、13a ハブ 14 雌スプライン部 15 等速ジョイント 16 駆動軸 17 ナット 18 段部 19 段差面 20 頂部 21 平坦面 22 スぺーサリング 23 平坦面 DESCRIPTION OF SYMBOLS 1, 1a Wheel support hub unit 2 Hub 3a, 3b Inner ring 4 Outer ring 5 Rolling element 6 Flange 7 Step 8 Cylindrical part 9, 9a Caulking part 10 Outer ring raceway 11 Inner ring raceway 12 Mounting part 13, 13a Hub 14 Female spline part 15 Constant velocity joint 16 Drive shaft 17 Nut 18 Step 19 Step surface 20 Top 21 Flat surface 22 Spacer 23 Flat surface
Claims (1)
ハブと、このハブの外端部外周面に設けられ、この軸部
材に車輪を支持固定する為のフランジと、上記ハブの中
間部外周面に、直接又はこのハブとは別体の内輪を介し
て形成した第一の内輪軌道と、上記ハブの内端部に形成
された、この第一の内輪軌道を形成した部分よりも外径
寸法が小さくなった段部と、外周面に第二の内輪軌道を
形成して上記段部に外嵌された内輪と、内周面に上記第
一の内輪軌道に対向する第一の外輪軌道及び上記第二の
内輪軌道に対向する第二の外輪軌道を有し、使用時に回
転しない外輪と、この外輪を懸架装置に取り付けるべ
く、この外輪の外周面に設けられた取付部と、上記第
一、第二の内輪軌道と上記第一、第二の外輪軌道との間
に、それぞれ複数個ずつ設けられた転動体とを備え、上
記段部に外嵌した内輪は、上記ハブの内端部でこの段部
に外嵌した内輪よりも内方に突出した部分に形成した円
筒部を直径方向外方にかしめ広げて形成したかしめ部に
より上記段部の段差面に向け抑え付けた状態で上記ハブ
に結合固定しており、このハブは外端面を上記駆動部材
の先端部に螺合したナットの内端面に、上記かしめ部の
内端面を上記駆動部材の内端部に形成した段部の段差面
に、それぞれ当接させた状態で上記ナットを緊締する事
により上記駆動部材に結合固定する車輪支持用ハブユニ
ットに於いて、上記駆動部材の内端部に形成した段部の
段差面と当接する部分である上記かしめ部の内端面に
は、上記駆動部材の内端部に形成した段部の段差面と面
接触自在な平坦面を設けている事を特徴とする車輪支持
用ハブユニット。A hub which is rotatably driven by a driving member during use; a flange provided on an outer peripheral surface of the outer end of the hub for supporting and fixing a wheel to the shaft member; and an outer peripheral surface of an intermediate portion of the hub. A first inner raceway formed directly or through an inner race separate from the hub, and an outer diameter dimension formed at an inner end portion of the hub, which is larger than a portion forming the first inner raceway. Is reduced, the inner ring is formed on the outer peripheral surface to form a second inner raceway, and the inner race is externally fitted to the step, and the first outer raceway facing the first inner raceway on the inner peripheral surface and An outer ring having a second outer ring raceway opposed to the second inner raceway and not rotating during use; an attaching portion provided on an outer peripheral surface of the outer ring to attach the outer ring to a suspension; Between the second inner raceway and the first and second outer raceways, respectively. Provided with a rolling element provided, wherein the inner ring externally fitted to the step portion has a cylindrical portion formed in a portion protruding inward from the inner ring externally fitted to the step portion at the inner end of the hub in a diametrical direction. A nut which is screwed and fixed to the hub in a state where it is pressed down toward the step surface of the step portion by a caulking portion formed by caulking and spreading outward, and the hub has an outer end surface screwed to a tip portion of the drive member. And the inner end surface of the caulked portion is in contact with the stepped surface of the step formed at the inner end portion of the drive member, and the nut is tightened in a state of being in contact with the drive member, thereby being fixedly connected to the drive member. In the wheel supporting hub unit, a step formed at the inner end of the driving member is provided at an inner end surface of the caulking portion, which is a portion that contacts a step surface of a step formed at the inner end of the driving member. It is characterized by providing a flat surface that can make surface contact with the step surface of the part For supporting the wheel hub unit.
Priority Applications (14)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15887897A JP3533883B2 (en) | 1997-06-16 | 1997-06-16 | Hub unit for wheel support |
EP98300221A EP0854303B1 (en) | 1997-01-17 | 1998-01-14 | Rolling bearing unit for supporting vehicle wheel |
DE69831102T DE69831102T2 (en) | 1997-01-17 | 1998-01-14 | Bearing unit for a vehicle wheel suspension |
DE69831515T DE69831515T2 (en) | 1997-01-17 | 1998-01-14 | Bearing unit for a vehicle wheel suspension |
DE69819217T DE69819217T2 (en) | 1997-01-17 | 1998-01-14 | Rolling bearing unit for a vehicle wheel |
DE69831434T DE69831434T2 (en) | 1997-01-17 | 1998-01-14 | Bearing unit for a vehicle wheel suspension |
EP03001091A EP1319854B1 (en) | 1997-01-17 | 1998-01-14 | Bearing unit for vehicle wheel support |
EP03001090A EP1312821B1 (en) | 1997-01-17 | 1998-01-14 | Bearing unit for vehicle wheel support |
EP03004632A EP1314903B1 (en) | 1997-01-17 | 1998-01-14 | Bearing unit for vehicle wheel support |
US09/005,716 US6280096B1 (en) | 1997-01-17 | 1998-01-16 | Rolling bearing unit for supporting vehicle wheel |
US09/641,863 US6422758B1 (en) | 1997-01-17 | 2000-08-18 | Rolling bearing unit for supporting vehicle wheel |
US09/916,420 US6524011B2 (en) | 1997-01-17 | 2001-07-27 | Rolling bearing unit for supporting vehicle wheel |
US10/113,879 US6672770B2 (en) | 1997-01-17 | 2002-04-01 | Rolling bearing unit for supporting vehicle wheel |
US10/341,826 US6761486B2 (en) | 1997-01-17 | 2003-01-14 | Rolling bearing unit for supporting vehicle wheel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15887897A JP3533883B2 (en) | 1997-06-16 | 1997-06-16 | Hub unit for wheel support |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH115404A true JPH115404A (en) | 1999-01-12 |
JP3533883B2 JP3533883B2 (en) | 2004-05-31 |
Family
ID=15681375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15887897A Expired - Lifetime JP3533883B2 (en) | 1997-01-17 | 1997-06-16 | Hub unit for wheel support |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3533883B2 (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002070881A (en) * | 2000-08-31 | 2002-03-08 | Koyo Seiko Co Ltd | Bearing device for vehicle |
WO2002078979A1 (en) * | 2001-03-29 | 2002-10-10 | Ntn Corporation | Bearing device for drive wheel |
US6782622B2 (en) | 2000-11-29 | 2004-08-31 | Nsk Ltd. | Method for manufacturing wheel-supporting hub unit and pressing mold for manufacturing same hub unit |
EP1621364A1 (en) * | 2004-07-27 | 2006-02-01 | Ntn Corporation | Bearing apparatus for a driving wheel of vehicle |
US7118182B2 (en) | 2000-04-05 | 2006-10-10 | Nsk, Ltd. | Axle unit for driving wheel |
KR100695720B1 (en) * | 2000-09-29 | 2007-03-15 | 닛본 세이고 가부시끼가이샤 | Bearing Unit for Wheel Drive |
JP2007205577A (en) * | 2007-04-26 | 2007-08-16 | Jtekt Corp | Hub unit |
JP2007211990A (en) * | 2007-05-14 | 2007-08-23 | Jtekt Corp | Method of manufacturing bearing device |
JP2007276764A (en) * | 2006-03-13 | 2007-10-25 | Ntn Corp | Bearing device for drive wheel |
JP2007276780A (en) * | 2007-06-06 | 2007-10-25 | Jtekt Corp | Vehicle bearing device |
US7665900B2 (en) | 2006-02-21 | 2010-02-23 | Ntn Corporation | Vehicle wheel bearing apparatus |
JP2011006064A (en) * | 2010-07-26 | 2011-01-13 | Jtekt Corp | Hub unit |
JP4940529B2 (en) * | 2000-08-21 | 2012-05-30 | 株式会社ジェイテクト | Bearing device and manufacturing method thereof |
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US7118182B2 (en) | 2000-04-05 | 2006-10-10 | Nsk, Ltd. | Axle unit for driving wheel |
JP4940529B2 (en) * | 2000-08-21 | 2012-05-30 | 株式会社ジェイテクト | Bearing device and manufacturing method thereof |
JP2002070881A (en) * | 2000-08-31 | 2002-03-08 | Koyo Seiko Co Ltd | Bearing device for vehicle |
KR100695720B1 (en) * | 2000-09-29 | 2007-03-15 | 닛본 세이고 가부시끼가이샤 | Bearing Unit for Wheel Drive |
US6782622B2 (en) | 2000-11-29 | 2004-08-31 | Nsk Ltd. | Method for manufacturing wheel-supporting hub unit and pressing mold for manufacturing same hub unit |
EP2189304A2 (en) | 2001-03-29 | 2010-05-26 | Ntn Corporation | Bearing device for drive wheel |
CN1309582C (en) * | 2001-03-29 | 2007-04-11 | Ntn株式会社 | Bearing device for drive wheel |
EP1375196A1 (en) * | 2001-03-29 | 2004-01-02 | Ntn Corporation | Bearing device for drive wheel |
WO2002078979A1 (en) * | 2001-03-29 | 2002-10-10 | Ntn Corporation | Bearing device for drive wheel |
EP1375196A4 (en) * | 2001-03-29 | 2007-09-19 | Ntn Toyo Bearing Co Ltd | Bearing device for drive wheel |
EP2189304A3 (en) * | 2001-03-29 | 2010-09-22 | NTN Corporation | Bearing device for drive wheel |
EP1621364A1 (en) * | 2004-07-27 | 2006-02-01 | Ntn Corporation | Bearing apparatus for a driving wheel of vehicle |
US7665900B2 (en) | 2006-02-21 | 2010-02-23 | Ntn Corporation | Vehicle wheel bearing apparatus |
JP2007276764A (en) * | 2006-03-13 | 2007-10-25 | Ntn Corp | Bearing device for drive wheel |
JP2007205577A (en) * | 2007-04-26 | 2007-08-16 | Jtekt Corp | Hub unit |
JP2007211990A (en) * | 2007-05-14 | 2007-08-23 | Jtekt Corp | Method of manufacturing bearing device |
JP2007276780A (en) * | 2007-06-06 | 2007-10-25 | Jtekt Corp | Vehicle bearing device |
JP2011006064A (en) * | 2010-07-26 | 2011-01-13 | Jtekt Corp | Hub unit |
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