JP2008163979A - Wheel bearing device - Google Patents

Wheel bearing device Download PDF

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Publication number
JP2008163979A
JP2008163979A JP2006351742A JP2006351742A JP2008163979A JP 2008163979 A JP2008163979 A JP 2008163979A JP 2006351742 A JP2006351742 A JP 2006351742A JP 2006351742 A JP2006351742 A JP 2006351742A JP 2008163979 A JP2008163979 A JP 2008163979A
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Japan
Prior art keywords
wheel
wheel bearing
bearing device
seal
outer member
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Pending
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JP2006351742A
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Japanese (ja)
Inventor
Kazuhisa Shigeoka
和寿 重岡
Kazunari Yamamoto
一成 山本
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2006351742A priority Critical patent/JP2008163979A/en
Priority to CN200780041384XA priority patent/CN101535664B/en
Priority to PCT/JP2007/001215 priority patent/WO2008056446A1/en
Priority to DE112007002599T priority patent/DE112007002599T5/en
Publication of JP2008163979A publication Critical patent/JP2008163979A/en
Priority to US12/436,205 priority patent/US8047722B2/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighter, compacter and more inexpensive wheel bearing device. <P>SOLUTION: The wheel bearing device having a wheel mounting flange 5 at one end comprises a hub ring 1 having a small diameter stepped portion 1b formed on the outer periphery, and a wheel bearing 2 pressed therein. The wheel bearing 2 consists of an outward member 7 having double-row outside rolling surfaces 7a formed on the inner periphery, a pair of inner rings 8, 9 having inside rolling surfaces 8a, 9a opposed to the double-row outside rolling surfaces 7a, double-row balls 11 stored between both rolling surfaces, and a pair of seals 15 mounted in opening portions between the outward member 7 and each of the inner rings 8, 9. The outward member 7 and the inner rings 8, 9 are formed from steel plates with plastic work, and a shoulder portion 14 is formed at one end of each of the inner rings 8, 9 extending outward to the radial direction. The seal 15 is integrally joined to the shoulder portion 14 with vulcanizing adhesion. Cylindrical portions 13 are formed at both ends of the outward member 7, and the seal 15 is put in sliding contact therewith. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、自動車等の車両の車輪を回転自在に支承する車輪用軸受装置、詳しくは、軽量・コンパクト化と共に、低コスト化を図った車輪用軸受装置に関するものである。   The present invention relates to a wheel bearing device that rotatably supports a wheel of a vehicle such as an automobile, and more particularly to a wheel bearing device that achieves a reduction in cost while being lightweight and compact.

従来から自動車等の車輪を支持する車輪用軸受装置は、車輪を取り付けるためのハブ輪を複列の転がり軸受を介して回転自在に支承するもので、駆動輪用と従動輪用とがある。構造上の理由から、駆動輪用では内輪回転方式が、従動輪用では内輪回転と外方部材回転の両方式が一般的に採用されている。この車輪用軸受装置には、懸架装置を構成するナックルとハブ輪との間に複列アンギュラ玉軸受等からなる車輪用軸受を嵌合させた第1世代と称される構造から、外方部材の外周に直接車体取付フランジまたは車輪取付フランジが形成された第2世代構造、また、ハブ輪の外周に一方の内側転走面が直接形成された第3世代構造、あるいは、ハブ輪と等速自在継手の外側継手部材の外周にそれぞれ内側転走面が直接形成された第4世代構造とに大別されている。   2. Description of the Related Art Conventionally, a wheel bearing device for supporting a wheel of an automobile or the like supports a hub wheel for mounting a wheel rotatably via a double row rolling bearing, and includes a drive wheel and a driven wheel. For structural reasons, an inner ring rotation method is generally used for driving wheels, and both an inner ring rotation method and an outer member rotation method are generally used for driven wheels. This wheel bearing device has a structure called a first generation in which a wheel bearing composed of a double-row angular ball bearing or the like is fitted between a knuckle and a hub wheel constituting a suspension device, and is an outer member. 2nd generation structure with body mounting flange or wheel mounting flange formed directly on the outer periphery of the wheel, 3rd generation structure with one inner rolling surface formed directly on the outer periphery of the hub wheel, or constant speed with the hub wheel It is roughly classified into a fourth generation structure in which the inner rolling surface is directly formed on the outer periphery of the outer joint member of the universal joint.

従来から、内輪および外輪(外方部材)が鋼板からプレス加工によって形成された構造のアンギュラ玉軸受が知られている。例えば、図5に示すアンギュラ玉軸受50は、磁気ハードディスク装置等に使用されるものであるが、外輪51および一対の内輪52、53は、ステンレス鋼板からプレス加工またはローリング加工によって形成されている。   Conventionally, an angular ball bearing having a structure in which an inner ring and an outer ring (outer member) are formed by pressing from a steel plate is known. For example, the angular ball bearing 50 shown in FIG. 5 is used in a magnetic hard disk device or the like, but the outer ring 51 and the pair of inner rings 52 and 53 are formed from a stainless steel plate by pressing or rolling.

外輪51は、内周面の略中間部に径方向内方に突出する環状凸部51aが形成され、この環状凸部51aの両側の内周面に外側転走面51b、51cが形成されている。この外輪51は、外周面がハウジング54の穴に嵌合され、一端部に形成されたフランジ51dがハウジング54の端面に当接されて、軸方向の位置決めが行われている。また、環状凸部51aにより、外輪51の外周面には環状凹部51eが形成され、この環状凹部51eに接着剤が充填されてハウジング54の穴に外輪51が固定されている。   The outer ring 51 is formed with an annular convex portion 51a protruding radially inward at a substantially middle portion of the inner peripheral surface, and outer rolling surfaces 51b and 51c are formed on inner peripheral surfaces on both sides of the annular convex portion 51a. Yes. The outer ring 51 has an outer peripheral surface fitted into a hole in the housing 54, and a flange 51 d formed at one end is brought into contact with the end surface of the housing 54 to perform axial positioning. An annular recess 51e is formed on the outer peripheral surface of the outer ring 51 by the annular protrusion 51a. The annular recess 51e is filled with an adhesive, and the outer ring 51 is fixed to the hole of the housing 54.

一方、内輪52、53は、外輪51の複列の外側転走面51b、51cの内側に軸方向の両側からそれぞれ嵌合される。これら内輪52、53の軸方向外端外周には、湾曲肩部52a、53aが形成され、この湾曲肩部52a、53aに内側転走面52b、53bが形成されている。そして、複列のボール56、56がこれらの内側転走面52b、53bと外輪51の複列の外側転走面51b、51cとの間に配置され、保持器57、57により各列毎に保持されている。   On the other hand, the inner rings 52 and 53 are respectively fitted inside the double row outer raceway surfaces 51b and 51c of the outer ring 51 from both sides in the axial direction. Curved shoulder portions 52a and 53a are formed on the outer circumferences of the outer ends in the axial direction of the inner rings 52 and 53, and inner rolling surfaces 52b and 53b are formed on the curved shoulder portions 52a and 53a. The double rows of balls 56, 56 are arranged between the inner rolling surfaces 52b, 53b and the outer rolling surfaces 51b, 51c of the outer ring 51, and are retained by the cages 57, 57 for each row. Is retained.

内輪52、53の内周面には、軸部材55に隙間嵌めされる嵌合部52c、53cが形成されている。内輪52、53が軸部材55に軸方向から隙間嵌めされた後、一方の内輪52の湾曲肩部52aに重量が一定の円筒形の重錘59が乗せられ、この重錘59の重量により、内輪52、ボール56、外輪51、ボール56を経由して他方の内輪53が押圧され、湾曲肩部53aが軸部材55の鍔部55aに当接するまで嵌合される。これにより、アンギュラ玉軸受50に適正な予圧が設定される。   On the inner peripheral surfaces of the inner rings 52 and 53, fitting portions 52c and 53c that are fitted into the shaft member 55 with clearance are formed. After the inner rings 52, 53 are fitted into the shaft member 55 in the axial direction, a cylindrical weight 59 having a constant weight is placed on the curved shoulder 52 a of one inner ring 52, and the weight of the weight 59 The other inner ring 53 is pressed via the inner ring 52, the ball 56, the outer ring 51, and the ball 56, and the curved shoulder portion 53 a is fitted until it comes into contact with the flange portion 55 a of the shaft member 55. Thereby, an appropriate preload is set for the angular ball bearing 50.

この隙間嵌めが完了すると、一方の内輪52の湾曲肩部52aと軸部材55との間の隙間に接着剤60が充填され、この接着剤60で一方の内輪52の嵌め外れが防止されると共に、軸部材55の鍔部55aで他方の内輪53の嵌め外れが防止される。
実開平6−1835号公報
When this gap fitting is completed, the adhesive 60 is filled in the gap between the curved shoulder portion 52a of the one inner ring 52 and the shaft member 55, and this adhesive 60 prevents the one inner ring 52 from being fitted off. The flange portion 55a of the shaft member 55 prevents the other inner ring 53 from being fitted off.
Japanese Utility Model Publication No. 6-1835

然しながら、この種のプレス製のアンギュラ玉軸受を車輪用軸受として使用した場合、シール性を確保するためにシール装置(図示せず)を外輪51と内輪52、53との間に形成される環状空間の開口部に装着する必要があるが、部品点数が増えるだけでなく、シールスペースを確保するための構造変更が余儀なくされ、加工コストと共に組立工数が嵩んでコストアップは否めない。   However, when this type of angular contact ball bearing made of a press is used as a wheel bearing, a sealing device (not shown) is formed between the outer ring 51 and the inner rings 52 and 53 in order to ensure sealing performance. Although it is necessary to attach to the opening of the space, not only the number of parts increases, but also a structural change for securing the sealing space is unavoidable, and the number of assembly steps increases along with the processing cost, and the cost increase cannot be denied.

本発明は、このような事情に鑑みてなされたもので、軽量・コンパクト化と共に、低コスト化を図った車輪用軸受装置を提供することを目的としている。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a wheel bearing device that is reduced in cost and weight while being compact.

係る目的を達成すべく、本発明のうち請求項1に記載の発明は、内周に複列の外側転走面が形成された外方部材と、一端部に車輪取付フランジを一体に有し、この車輪取付フランジから軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に所定のシメシロを介して圧入された少なくとも一つの内輪からなる内方部材と、この内方部材と前記外方部材の両転走面間に収容された複列の転動体と、前記内方部材と外方部材との間に形成される環状空間の開口部に装着された一対のシールとを備えた車輪用軸受装置において、前記外方部材と内方部材が鋼板から塑性加工によって形成されると共に、前記一対のシールのうち少なくとも一方のシールが前記外方部材または内方部材のどちらか一方の部材に一体に接合されている。   In order to achieve such an object, the invention according to claim 1 of the present invention integrally has an outer member having a double row outer rolling surface formed on the inner periphery and a wheel mounting flange at one end. A hub wheel formed with a small-diameter step portion extending in the axial direction from the wheel mounting flange, and an inner member comprising at least one inner ring press-fitted into the small-diameter step portion of the hub wheel via a predetermined shimiro, A pair of rolling elements housed between both rolling surfaces of the inner member and the outer member, and a pair attached to an opening of an annular space formed between the inner member and the outer member The outer bearing member and the inner member are formed from a steel plate by plastic working, and at least one of the pair of seals is the outer member or the inner member. It is integrally joined to one of the members .

このように、一端部に車輪取付フランジを一体に有するハブ輪と、複列の転がり軸受で構成された第1乃至第3世代構造の車輪用軸受装置において、外方部材と内方部材が鋼板から塑性加工によって形成されると共に、一対のシールのうち少なくとも一方のシールが外方部材または内方部材のどちらか一方の部材に一体に接合されているので、部品点数が削減できると共に、組立工数が大幅に削減でき、低コスト化を図ることができる。   Thus, in the wheel bearing device of the 1st thru / or 3rd generation structure constituted by the hub wheel which has a wheel mounting flange in one end integrally, and a double row rolling bearing, an outer member and an inner member are steel plates. Since at least one of the pair of seals is integrally joined to either the outer member or the inner member, the number of parts can be reduced and the number of assembly steps can be reduced. Can be significantly reduced, and the cost can be reduced.

好ましくは、請求項2に記載の発明のように、前記シールがエラストマーからなり、加硫接着により接合されて対向する他方の部材に摺接されていれば、所望のシール性を確保することができる。   Preferably, as in the invention described in claim 2, if the seal is made of an elastomer and is joined by vulcanization adhesion and is slidably contacted with the other member facing, the desired sealability can be secured. it can.

また、請求項3に記載の発明のように、前記内輪の一端部に径方向外方に延びる肩部が形成され、この肩部に前記シールが接合されると共に、前記外方部材の両端部に円筒部が形成され、この円筒部に前記シールが摺接されていても良いし、また、請求項4に記載の発明のように、前記外方部材の両端部に径方向内方に延びる肩部が形成され、この肩部に前記シールが接合されると共に、前記内輪の一端部に軸方向に延びる円筒状の肩部が形成され、この肩部に前記シールが摺接されていても良い。   According to a third aspect of the present invention, a shoulder portion extending radially outward is formed at one end portion of the inner ring, the seal is joined to the shoulder portion, and both end portions of the outer member are formed. A cylindrical portion may be formed on the cylindrical portion, and the seal may be slidably contacted with the cylindrical portion, and may extend radially inward at both ends of the outer member as in the invention according to claim 4. A shoulder is formed, and the seal is joined to the shoulder, and a cylindrical shoulder extending in the axial direction is formed at one end of the inner ring, and the seal is in sliding contact with the shoulder. good.

また、請求項5に記載の発明のように、前記ハブ輪の外周に前記複列の外側転走面に対向する一方の内側転走面が直接形成され、この内側転走面から肩部を介して前記小径段部が形成されると共に、前記内輪が外周に前記複列の外側転走面に対向する他方の内側転走面が形成され、その小径側端面が前記肩部に突合せ状態で衝合されていれば、ハブ輪の強度・剛性を高めると共に、装置の軽量・コンパクト化を図ることができる。   Further, as in the invention according to claim 5, one inner rolling surface facing the outer rolling surface of the double row is directly formed on the outer periphery of the hub wheel, and a shoulder portion is formed from the inner rolling surface. The inner diameter of the inner ring is formed on the outer periphery of the inner ring, the other inner rolling surface facing the outer rolling surface of the double row is formed, and the end surface on the small diameter side is in contact with the shoulder. If it is abutted, the strength and rigidity of the hub wheel can be increased, and the device can be reduced in weight and size.

本発明に係る車輪用軸受装置は、内周に複列の外側転走面が形成された外方部材と、一端部に車輪取付フランジを一体に有し、この車輪取付フランジから軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に所定のシメシロを介して圧入された少なくとも一つの内輪からなる内方部材と、この内方部材と前記外方部材の両転走面間に収容された複列の転動体と、前記内方部材と外方部材との間に形成される環状空間の開口部に装着された一対のシールとを備えた車輪用軸受装置において、前記外方部材と内方部材が鋼板から塑性加工によって形成されると共に、前記一対のシールのうち少なくとも一方のシールが前記外方部材または内方部材のどちらか一方の部材に一体に接合されているので、生産性が向上すると共に、歩溜まりが良く、また、部品点数が削減できると共に、組立工数が大幅に削減でき、低コスト化を図ることができる。   The wheel bearing device according to the present invention integrally has an outer member having a double row outer raceway formed on the inner periphery and a wheel mounting flange at one end, and extends in an axial direction from the wheel mounting flange. A hub ring formed with a small-diameter step portion, an inner member comprising at least one inner ring press-fitted into the small-diameter step portion of the hub ring via a predetermined shimeshiro, and both the inner member and the outer member A wheel bearing device comprising: a double row of rolling elements housed between rolling surfaces; and a pair of seals attached to an opening of an annular space formed between the inner member and the outer member. The outer member and the inner member are formed from a steel plate by plastic working, and at least one of the pair of seals is integrally joined to either the outer member or the inner member. As productivity increases, May accumulate step, also, the number of parts can be reduced, assembling steps can be greatly reduced, it is possible to reduce the cost.

一端部に車輪取付フランジを一体に有し、この車輪取付フランジから軸方向に延びる小径段部が形成されたハブ輪と、このハブ輪の小径段部に圧入された複列の転がり軸受からなる車輪用軸受とを備え、この車輪用軸受が、内周に複列の外側転走面が形成された外方部材と、前記複列の外側転走面に対向する内側転走面が形成された一対の内輪と、前記両転走面間に収容された複列の転動体と、前記外方部材と内輪との間に形成される環状空間の開口部に装着された一対のシールとを備えた車輪用軸受装置において、前記内輪の一端部に径方向外方に延びる肩部が形成され、この肩部に前記シールが加硫接着により一体に接合されると共に、前記外方部材の両端部に円筒部が形成され、この円筒部に前記シールが摺接されている。   It consists of a hub wheel integrally formed with a wheel mounting flange at one end, a small diameter step portion extending in the axial direction from the wheel mounting flange, and a double row rolling bearing press-fitted into the small diameter step portion of the hub ring. A wheel bearing, wherein the wheel bearing is formed with an outer member having a double-row outer rolling surface formed on an inner periphery and an inner rolling surface opposed to the double-row outer rolling surface. A pair of inner rings, a double row rolling element housed between the rolling surfaces, and a pair of seals mounted in an opening of an annular space formed between the outer member and the inner ring. In the wheel bearing device provided, a shoulder portion extending radially outward is formed at one end portion of the inner ring, and the seal is integrally joined to the shoulder portion by vulcanization bonding, and both ends of the outer member A cylindrical portion is formed on the portion, and the seal is in sliding contact with the cylindrical portion.

以下、本発明の実施の形態を図面に基いて詳細に説明する。
図1は、本発明に係る車輪用軸受装置の第1の実施形態を示す縦断面図、図2(a)は図1の外方部材単体を示す縦断面図、(b)は、内輪単体を示す縦断面図である。なお、以下の説明では、車両に組み付けた状態で車両の外側寄りとなる側をアウター側(図面左側)、中央寄り側をインナー側(図面右側)という。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention, FIG. 2 (a) is a longitudinal sectional view showing a single outer member of FIG. 1, and FIG. 1 (b) is a single inner ring. FIG. In the following description, the side closer to the outer side of the vehicle in a state assembled to the vehicle is referred to as the outer side (left side in the drawing), and the side closer to the center is referred to as the inner side (right side in the drawing).

この車輪用軸受装置は第1世代構造をなし、ハブ輪1と、このハブ輪1に装着される車輪用軸受2とを備えている。ハブ輪1には等速自在継手3がトルク伝達自在に内嵌され、固定ナット4を介してハブ輪1と等速自在継手3が分離可能に一体化されている。   This wheel bearing device has a first generation structure, and includes a hub wheel 1 and a wheel bearing 2 attached to the hub wheel 1. A constant velocity universal joint 3 is fitted into the hub wheel 1 so as to be able to transmit torque, and the hub wheel 1 and the constant velocity universal joint 3 are detachably integrated via a fixing nut 4.

ハブ輪1は、アウター側の一端部に車輪(図示せず)を取り付けるための車輪取付フランジ5を有し、外周にこの車輪取付フランジ5から肩部1aを介して軸方向に延びる円筒状の小径段部1bが形成され、内周にトルク伝達用のセレーション(またはスプライン)1cが形成されている。このハブ輪1はS53C等の炭素0.40〜0.80wt%を含む中高炭素鋼で形成され、肩部1aから小径段部1bに亙って高周波焼入れによって表面硬さを58〜64HRCの範囲に硬化処理されている。   The hub wheel 1 has a wheel mounting flange 5 for mounting a wheel (not shown) at one end portion on the outer side, and a cylindrical shape extending from the wheel mounting flange 5 to the outer periphery in the axial direction via a shoulder portion 1a. A small-diameter step portion 1b is formed, and a serration (or spline) 1c for torque transmission is formed on the inner periphery. This hub wheel 1 is made of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and the surface hardness is in the range of 58 to 64 HRC by induction hardening from the shoulder 1a to the small diameter step 1b. Has been cured.

車輪用軸受2は、ナックル6に内嵌され、内周に複列の外側転走面7a、7aが形成された外方部材7と、外周にこれら複列の外側転走面7a、7aに対向する内側転走面8a、9aが形成された一対の内輪8、9と、両転走面間に保持器10、10を介して転動自在に収容された複列の転動体(ボール)11、11とを備えている。そして、内輪8、9の小径(正面)側の端面8b、9bが突合せ状態で衝合し、所謂背面合せタイプの複列のアンギュラ玉軸受を構成している。   The wheel bearing 2 is fitted into the knuckle 6, the outer member 7 is formed with double row outer rolling surfaces 7 a, 7 a on the inner periphery, and the outer surface 7 a, 7 a of these double rows is formed on the outer periphery. A pair of inner rings 8 and 9 formed with opposed inner rolling surfaces 8a and 9a, and double row rolling elements (balls) accommodated between the rolling surfaces via cages 10 and 10 so as to roll freely. 11 and 11. The end faces 8b and 9b on the small diameter (front) side of the inner rings 8 and 9 abut each other in a butted state to constitute a so-called back-to-back type double row angular ball bearing.

外方部材7および内輪8、9は、炭素量が比較的少ないSCr420やSCM415等の浸炭鋼からなる鋼板をプレス加工あるいはローリング加工(以下、塑性加工と言う)によって形成されている。そして、浸炭焼入れによって表面硬さを50〜64HRCの範囲に硬化処理されている。外方部材7および内輪8、9の材質としてこれ以外にも、SCM440や冷間圧延鋼鈑(JIS規格のSPCC系等)やS45C等の炭素鋼を例示することができる。冷間圧延鋼鈑や炭素鋼の場合、少なくとも外方部材7においては複列の外側転走面7a、7a、内輪8、9においては内側転走面8a、9aが高周波焼入れによって表面硬さを50〜64HRCの範囲に硬化処理が施され、転がり疲労寿命を向上させている。なお、これらの転走面は、必要に応じて研削、超仕上げ加工が施される。   The outer member 7 and the inner rings 8 and 9 are formed by pressing or rolling (hereinafter referred to as plastic working) a steel plate made of carburized steel such as SCr420 and SCM415 having a relatively small amount of carbon. And the surface hardness is hardened in the range of 50 to 64 HRC by carburizing and quenching. Other examples of the material of the outer member 7 and the inner rings 8, 9 include carbon steel such as SCM440, cold rolled steel plate (JIS standard SPCC system, etc.), S45C, and the like. In the case of cold rolled steel or carbon steel, at least the outer member 7 has double-row outer rolling surfaces 7a and 7a, and inner rings 8 and 9 have inner rolling surfaces 8a and 9a having surface hardness by induction hardening. Curing treatment is performed in the range of 50 to 64 HRC to improve the rolling fatigue life. In addition, these rolling surfaces are subjected to grinding and superfinishing as necessary.

次に、図2を用いて、外方部材7および内輪8、9の構成について詳細に説明する。
外方部材7は、圧延鋼板を所定の外径からなる円板形の素材に打ち抜くと共に、この素材が深絞り加工によってカップ状に形成され、その後、底部を打ち抜くことによって円筒状に形成される。そして、(a)に示すように、この円筒状の素材の内周面に塑性加工により、径方向内方に突出する環状凸部12が形成される。さらに、この環状凸部12の両側に複列の外側転走面7a、7aが塑性加工により形成されると共に、両端部に後述するシール14のシールランド部となる円筒部13、13が形成される。
Next, the configuration of the outer member 7 and the inner rings 8, 9 will be described in detail with reference to FIG.
The outer member 7 is formed into a cylindrical shape by punching a rolled steel plate into a disk-shaped material having a predetermined outer diameter, and this material is formed into a cup shape by deep drawing, and then punching out the bottom. . And as shown to (a), the cyclic | annular convex part 12 which protrudes to a radial inside is formed in the internal peripheral surface of this cylindrical raw material by plastic working. Further, double-row outer rolling surfaces 7a and 7a are formed on both sides of the annular convex portion 12 by plastic working, and cylindrical portions 13 and 13 serving as seal land portions of a seal 14 described later are formed on both ends. The

一方、内輪8(9)は、外方部材7と同様、圧延鋼板を所定の外径からなる円板形の素材に打ち抜くと共に、この素材が深絞り加工によってカップ状に形成され、その後、底部を打ち抜くことによって円筒状に形成される。そして、(b)に示すように、この円筒状の素材の外周面に塑性加工により、内側転走面8a(9a)と、この内側転走面8a(9a)から径方向外方に延びる肩部14が形成される。   On the other hand, the inner ring 8 (9), like the outer member 7, is formed by punching a rolled steel sheet into a disk-shaped material having a predetermined outer diameter, and this material is formed into a cup shape by deep drawing. Is formed into a cylindrical shape. And as shown in (b), the outer peripheral surface of this cylindrical raw material is plastically processed to the inner rolling surface 8a (9a) and the shoulder extending radially outward from the inner rolling surface 8a (9a). Part 14 is formed.

内輪8、9の肩部14、14はハブ輪1の肩部1aと等速自在継手3に当接され、これらの肩部1aと等速自在継手3に挟持された状態でハブ輪1の小径段部1bに圧入固定されている。そして、固定ナット4を所定の締付トルクで緊締することにより、所定の軸受予圧が付与されている。   The shoulder portions 14, 14 of the inner rings 8, 9 are in contact with the shoulder portion 1 a of the hub wheel 1 and the constant velocity universal joint 3, and the hub wheel 1 is held between the shoulder portions 1 a and the constant velocity universal joint 3. It is press-fitted and fixed to the small diameter step 1b. A predetermined bearing preload is applied by tightening the fixing nut 4 with a predetermined tightening torque.

ここで、本実施形態では、内輪8、9の肩部14にシール15が一体に接合されている。すなわち、シール15はニトリルゴム等からなるエラストマーからなり、一対のラジアルリップを備え、加硫接着により肩部14に一体に接合されている。そして、図1に示すように、外方部材7の円筒部13に摺接して軸受内部に封入されたグリースの漏洩と、外部から雨水やダスト等の異物が軸受内部に侵入するのを防止している。これにより、所望のシール性を確保して部品点数が削減できると共に、組立工数が大幅に削減でき、低コスト化を図ることができる。   Here, in this embodiment, the seal 15 is integrally joined to the shoulder portions 14 of the inner rings 8 and 9. That is, the seal 15 is made of an elastomer made of nitrile rubber or the like, has a pair of radial lips, and is integrally joined to the shoulder portion 14 by vulcanization adhesion. As shown in FIG. 1, leakage of grease sealed inside the bearing in sliding contact with the cylindrical portion 13 of the outer member 7 and prevention of foreign matter such as rainwater and dust from entering the bearing from the outside are prevented. ing. As a result, the desired sealing performance can be secured and the number of parts can be reduced, and the number of assembling steps can be greatly reduced, and the cost can be reduced.

また、本実施形態では、外方部材7および内輪8、9が塑性加工で形成され、実質的に機械加工なしに製造されているので生産性が向上すると共に、歩溜まりが良く低コスト化ができる。なお、ここでは、車輪用軸受2として転動体9にボールを使用した複列アンギュラ玉軸受を例示したが、これに限らず転動体に円すいころを使用した複列円すいころ軸受であっても良い。   Further, in the present embodiment, the outer member 7 and the inner rings 8, 9 are formed by plastic working and are manufactured substantially without machining, so that productivity is improved and yield is improved and cost reduction is achieved. it can. Here, the double-row angular contact ball bearing using balls as the rolling elements 9 is illustrated as the wheel bearing 2, but the present invention is not limited thereto, and a double-row tapered roller bearing using tapered rollers as the rolling elements may be used. .

図3は、本発明に係る車輪用軸受装置の第2の実施形態を示す縦断面図である。なお、この実施形態は、前述した第1の実施形態とハブ輪の構成が一部異なるだけで、その他同一部品同一部位あるいは同一機能を有する部位には同じ符号を付して詳細な説明を省略する。   FIG. 3 is a longitudinal sectional view showing a second embodiment of the wheel bearing device according to the present invention. In this embodiment, only the configuration of the hub wheel is partially different from that of the first embodiment described above, and other parts having the same parts or the same functions are denoted by the same reference numerals and detailed description thereof is omitted. To do.

この車輪用軸受装置は第3世代構造をなし、外方部材7と、ハブ輪16およびこのハブ輪16に圧入固定された内輪9からなる内方部材17とを備えている。ハブ輪16には等速自在継手3がトルク伝達自在に内嵌され、固定ナット4を介してハブ輪16と等速自在継手3が分離可能に一体化されている。   This wheel bearing device has a third generation structure, and includes an outer member 7 and an inner member 17 including a hub ring 16 and an inner ring 9 press-fitted and fixed to the hub ring 16. A constant velocity universal joint 3 is fitted into the hub wheel 16 so as to be able to transmit torque, and the hub wheel 16 and the constant velocity universal joint 3 are detachably integrated via a fixing nut 4.

ハブ輪16は、アウター側の一端部に車輪(図示せず)を取り付けるための車輪取付フランジ5を有し、外周に複列の外側転走面7a、7aのうちアウター側の外側転走面7aに対向する内側転走面16aと、この内側転走面16aから軸方向に延びる円筒状の小径段部16bが形成され、内周にトルク伝達用のセレーション(またはスプライン)1cが形成されている。このハブ輪16はS53C等の炭素0.40〜0.80wt%を含む中高炭素鋼で形成され、後述するアウター側のシール18のシールランド部となるフランジ基部5aから内側転走面16aおよび小径段部16bに亙って高周波焼入れによって表面硬さを58〜64HRCの範囲に硬化処理されている。   The hub wheel 16 has a wheel mounting flange 5 for attaching a wheel (not shown) to one end portion on the outer side, and the outer side outer rolling surface of the double row outer rolling surfaces 7a and 7a on the outer periphery. An inner rolling surface 16a opposite to 7a and a cylindrical small diameter step portion 16b extending in the axial direction from the inner rolling surface 16a are formed, and a serration (or spline) 1c for torque transmission is formed on the inner periphery. Yes. The hub wheel 16 is made of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C and the like, and from the flange base portion 5a serving as a seal land portion of the outer seal 18 described later, to the inner rolling surface 16a and the small diameter. The surface hardness is hardened to a range of 58 to 64 HRC by induction hardening over the stepped portion 16b.

内輪9はハブ輪16の小径段部16bに圧入され、その小径側端面9bがハブ輪16の肩部16cに突合せ状態で衝合して背面合せタイプの複列のアンギュラ玉軸受を構成している。そして、内輪9の肩部14はハブ輪16の肩部16cと等速自在継手3に当接され、肩部1aと等速自在継手3に挟持された状態で、固定ナット4を所定の締付トルクで緊締することにより、所定の軸受予圧が付与されている。   The inner ring 9 is press-fitted into the small-diameter step portion 16b of the hub ring 16, and the small-diameter side end surface 9b collides with the shoulder portion 16c of the hub ring 16 in abutting state to form a back-to-back type double row angular ball bearing. Yes. The shoulder 14 of the inner ring 9 is in contact with the shoulder 16c of the hub wheel 16 and the constant velocity universal joint 3, and the fixing nut 4 is tightened to a predetermined level while being sandwiched between the shoulder 1a and the constant velocity universal joint 3. A predetermined bearing preload is applied by tightening with the applied torque.

ここで、本実施形態では、内輪9の肩部14にシール15が一体に接合されると共に、外方部材7のアウター側の円筒部13にエラストマー製のシール18が装着されている。これらのシール15、18は、外方部材7のインナー側の円筒部13とフランジ基部5aにそれぞれ摺接して軸受内部に封入されたグリースの漏洩と、外部から雨水やダスト等の異物が軸受内部に侵入するのを防止している。これにより、ハブ輪16の強度・剛性を高めると共に、所望のシール性を確保して装置の軽量・コンパクト化を図ることができる。   Here, in this embodiment, a seal 15 is integrally joined to the shoulder portion 14 of the inner ring 9, and an elastomer seal 18 is attached to the outer cylindrical portion 13 of the outer member 7. These seals 15 and 18 are formed in such a manner that grease that is slidably brought into contact with the inner cylindrical portion 13 and the flange base portion 5a of the outer member 7 and leaked inside the bearing and that foreign matters such as rainwater and dust from the outside are inside the bearing. To prevent intrusion. As a result, the strength and rigidity of the hub wheel 16 can be increased, and a desired sealing property can be ensured to reduce the weight and size of the device.

図4は、本発明に係る車輪用軸受装置の第3の実施形態を示す縦断面図である。なお、前述した実施形態と同一部品同一部位あるいは同一機能を有する部位には同じ符号を付して詳細な説明を省略する。   FIG. 4 is a longitudinal sectional view showing a third embodiment of the wheel bearing device according to the present invention. In addition, the same code | symbol is attached | subjected to the component same site | part or the site | part which has the same function as embodiment mentioned above, and detailed description is abbreviate | omitted.

この車輪用軸受装置は第1世代構造をなし、ハブ輪1と、このハブ輪1に装着される車輪用軸受19とを備えている。車輪用軸受19は、内周に複列の外側転走面7a、7aが形成された外方部材20と、外周にこれら複列の外側転走面7a、7aに対向する内側転走面8a、9aが形成された一対の内輪21、22と、両転走面間に保持器10、10を介して転動自在に収容された複列の転動体11、11とを備えている。   This wheel bearing device has a first generation structure, and includes a hub wheel 1 and a wheel bearing 19 attached to the hub wheel 1. The wheel bearing 19 includes an outer member 20 having double row outer rolling surfaces 7a, 7a formed on the inner periphery, and an inner rolling surface 8a facing the double row outer rolling surfaces 7a, 7a on the outer periphery. , 9a, and a pair of inner rings 21, 22 and double row rolling elements 11, 11 accommodated between the rolling surfaces via the cages 10, 10, respectively.

外方部材20および内輪21、22は、炭素量が比較的少ないSCr420やSCM415等の浸炭鋼からなる鋼板を塑性加工によって形成されている。そして、浸炭焼入れによって表面硬さを50〜64HRCの範囲に硬化処理されている。なお、これらの転走面は、必要に応じて研削、超仕上げ加工が施される。   The outer member 20 and the inner rings 21 and 22 are formed by plastic working of steel plates made of carburized steel such as SCr420 and SCM415 having a relatively small amount of carbon. And the surface hardness is hardened in the range of 50 to 64 HRC by carburizing and quenching. In addition, these rolling surfaces are subjected to grinding and superfinishing as necessary.

外方部材20は、内周面に複列の外側転走面7a、7aが形成されると共に、これら複列の外側転走面7a、7aの外端側に径方向内方に延びる肩部23が塑性加工により形成されている。そして、これら肩部23にエラストマー製のシール24、24が加硫接着により一体に接合されている。なお、肩部23は機械加工により段差部23aが形成され、ナックル6の鍔部6aに係合して位置決めされている。   The outer member 20 has double rows of outer rolling surfaces 7a, 7a formed on the inner peripheral surface thereof, and a shoulder portion extending radially inward to the outer end side of the double rows of outer rolling surfaces 7a, 7a. 23 is formed by plastic working. Elastomeric seals 24, 24 are integrally joined to these shoulder portions 23 by vulcanization adhesion. The shoulder portion 23 is formed with a stepped portion 23a by machining, and is positioned by engaging with the collar portion 6a of the knuckle 6.

一方、内輪21(22)は、外方部材20と同様、外周面に塑性加工により、内側転走面8a(9a)と、この内側転走面8aから軸方向に延びる円筒状の肩部25が形成される。そして、内輪21、22の肩部25、25はハブ輪1の肩部1aと等速自在継手3に当接され、これらの肩部1aと等速自在継手3に挟持された状態でハブ輪1の小径段部1bに圧入固定されている。そして、固定ナット4を所定の締付トルクで緊締することにより、所定の軸受予圧が付与されている。   On the other hand, the inner ring 21 (22) has an inner rolling surface 8a (9a) and a cylindrical shoulder 25 extending in the axial direction from the inner rolling surface 8a by plastic working on the outer peripheral surface, like the outer member 20. Is formed. The shoulder portions 25, 25 of the inner rings 21, 22 are in contact with the shoulder portion 1 a of the hub wheel 1 and the constant velocity universal joint 3, and the hub wheel is held between these shoulder portions 1 a and the constant velocity universal joint 3. It is press-fitted and fixed to one small diameter step 1b. A predetermined bearing preload is applied by tightening the fixing nut 4 with a predetermined tightening torque.

ここで、本実施形態では、外方部材20の肩部23、23にシール24、24が一体に接合され、これらのシール24、24が内輪21、22の肩部25、25に摺接して軸受内部に封入されたグリースの漏洩と、外部から雨水やダスト等の異物が軸受内部に侵入するのを防止している。これにより、部品点数が削減できると共に、組立工数が大幅に削減でき、低コスト化を図ることができる。   Here, in this embodiment, the seals 24 and 24 are integrally joined to the shoulder portions 23 and 23 of the outer member 20, and these seals 24 and 24 are in sliding contact with the shoulder portions 25 and 25 of the inner rings 21 and 22. It prevents leakage of grease sealed inside the bearing and foreign matter such as rainwater and dust from the outside. As a result, the number of parts can be reduced, the number of assembling steps can be greatly reduced, and the cost can be reduced.

以上、本発明の実施の形態について説明を行ったが、本発明はこうした実施の形態に何等限定されるものではなく、あくまで例示であって、本発明の要旨を逸脱しない範囲内において、さらに種々なる形態で実施し得ることは勿論のことであり、本発明の範囲は、特許請求の範囲の記載によって示され、さらに特許請求の範囲に記載の均等の意味、および範囲内のすべての変更を含む。   The embodiment of the present invention has been described above, but the present invention is not limited to such an embodiment, and is merely an example, and various modifications can be made without departing from the scope of the present invention. Of course, the scope of the present invention is indicated by the description of the scope of claims, and further, the equivalent meanings described in the scope of claims and all modifications within the scope of the scope of the present invention are included. Including.

本発明に係る車輪用軸受装置は、一端部に車輪取付フランジを一体に有するハブ輪と、このハブ輪に圧入された内輪とを備えた第1乃至第3世代構造の車輪用軸受装置に適用できる。   The wheel bearing device according to the present invention is applied to a wheel bearing device having a first to third generation structure including a hub wheel integrally having a wheel mounting flange at one end and an inner ring press-fitted into the hub wheel. it can.

本発明に係る車輪用軸受装置の第1の実施形態を示す縦断面図である。It is a longitudinal section showing a 1st embodiment of a bearing device for wheels concerning the present invention. (a)は、図1の外方部材単体を示す縦断面図である。 (b)は、同上、内輪単体を示す縦断面図である。(A) is a longitudinal cross-sectional view which shows the outer member single-piece | unit of FIG. (B) is the longitudinal cross-sectional view which shows an inner ring single-piece | unit as above. 本発明に係る車輪用軸受装置の第2の実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows 2nd Embodiment of the wheel bearing apparatus which concerns on this invention. 本発明に係る車輪用軸受装置の第3の実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows 3rd Embodiment of the wheel bearing apparatus which concerns on this invention. 従来の内・外輪がプレス加工によって形成された構造のアンギュラ玉軸受を示す縦断面図である。It is a longitudinal cross-sectional view which shows the angular contact ball bearing of the structure where the conventional inner and outer ring | wheel was formed by press work.

符号の説明Explanation of symbols

1、16・・・・・・・・・・・・・ハブ輪
1a、14、16c、23、25・・肩部
1b、16b・・・・・・・・・・・小径段部
1c・・・・・・・・・・・・・・・セレーション
2、19・・・・・・・・・・・・・車輪用軸受
3・・・・・・・・・・・・・・・・等速自在継手
4・・・・・・・・・・・・・・・・固定ナット
5・・・・・・・・・・・・・・・・車輪取付フランジ
5a・・・・・・・・・・・・・・・フランジ基部
6・・・・・・・・・・・・・・・・ナックル
6a・・・・・・・・・・・・・・・鍔部
7、20・・・・・・・・・・・・・外方部材
7a・・・・・・・・・・・・・・・外側転走面
8、9、21、22・・・・・・・・内輪
8a、9a・・・・・・・・・・・・内側転走面
8b、9b・・・・・・・・・・・・小径側端面
10・・・・・・・・・・・・・・・保持器
11・・・・・・・・・・・・・・・転動体
12・・・・・・・・・・・・・・・環状凸部
13・・・・・・・・・・・・・・・円筒部
15、18、24・・・・・・・・・シール
17・・・・・・・・・・・・・・・内方部材
50・・・・・・・・・・・・・・・アンギュラ玉軸受
51・・・・・・・・・・・・・・・外輪
51a・・・・・・・・・・・・・・環状凸部
51b、51c・・・・・・・・・・複列の外側転走面
51d・・・・・・・・・・・・・・フランジ
51e・・・・・・・・・・・・・・環状凹部
52、53・・・・・・・・・・・・内輪
52a、53a・・・・・・・・・・湾曲肩部
52b、53b・・・・・・・・・・内側転走面
52c、53c・・・・・・・・・・嵌合部
54・・・・・・・・・・・・・・・ハウジング
55・・・・・・・・・・・・・・・軸部材
55a・・・・・・・・・・・・・・鍔部
56・・・・・・・・・・・・・・・ボール
57・・・・・・・・・・・・・・・保持器
59・・・・・・・・・・・・・・・重錘
60・・・・・・・・・・・・・・・接着剤
1, 16 ·························································· Shoulder portions 1b, 16b・ ・ ・ ・ ・ ・ ・ ・ ・ Serrations 2 and 19 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Wheel bearings 3 ・ ・ ・ ・ ・ ・・ Constant velocity universal joint 4 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Fixing nut 5 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Wheel mounting flange 5a ・ ・ ・............ Flange base 6 ......... Knuckle 6a ... 20 ... Outer member 7a ... Outer rolling surface 8, 9, 21, 22, ...・ ・ Inner rings 8a, 9a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner rolling surfaces 8b, 9b ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ Small diameter side end face 10 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Retainer 11 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rolling element 12 ··············································································· Seal 17 .... Inner member 50 .... Angular contact ball bearing 51 ... Outer ring 51a ································· 51・ ・ ・ ・ Flange 51e ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Ring recess 52, 53 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner ring 52a, 53a ・ ・ ・ ・ ・ ・ ・ ・ ・・ Curved shoulders 52b, 53b .... Inner rolling surfaces 52c, 53 ····························································· ·························· 56 59 ... Weight 60 ... Adhesive

Claims (5)

内周に複列の外側転走面が形成された外方部材と、
一端部に車輪取付フランジを一体に有し、この車輪取付フランジから軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に所定のシメシロを介して圧入された少なくとも一つの内輪からなる内方部材と、
この内方部材と前記外方部材の両転走面間に収容された複列の転動体と、
前記内方部材と外方部材との間に形成される環状空間の開口部に装着された一対のシールとを備えた車輪用軸受装置において、
前記外方部材と内方部材が鋼板から塑性加工によって形成されると共に、前記一対のシールのうち少なくとも一方のシールが前記外方部材または内方部材のどちらか一方の部材に一体に接合されていることを特徴とする車輪用軸受装置。
An outer member having a double row outer raceway formed on the inner periphery;
A hub wheel integrally having a wheel mounting flange at one end and a small-diameter step portion extending in the axial direction from the wheel mounting flange, and at least a small-diameter step portion of the hub wheel press-fitted through a predetermined squeezing An inner member consisting of one inner ring,
A double row rolling element housed between both rolling surfaces of the inner member and the outer member;
In a wheel bearing device comprising a pair of seals mounted in an opening of an annular space formed between the inner member and the outer member,
The outer member and the inner member are formed from a steel plate by plastic working, and at least one of the pair of seals is integrally joined to either the outer member or the inner member. A wheel bearing device characterized by comprising:
前記シールがエラストマーからなり、加硫接着により接合されて対向する他方の部材に摺接されている請求項1に記載の車輪用軸受装置。   The wheel bearing device according to claim 1, wherein the seal is made of an elastomer, and is slidably contacted with the other member facing and bonded by vulcanization adhesion. 前記内輪の一端部に径方向外方に延びる肩部が形成され、この肩部に前記シールが接合されると共に、前記外方部材の両端部に円筒部が形成され、この円筒部に前記シールが摺接されている請求項1または2に記載の車輪用軸受装置。   A shoulder portion extending radially outward is formed at one end portion of the inner ring, and the seal is joined to the shoulder portion, and cylindrical portions are formed at both end portions of the outer member, and the seal portion is formed on the cylindrical portion. The wheel bearing device according to claim 1, wherein is in sliding contact. 前記外方部材の両端部に径方向内方に延びる肩部が形成され、この肩部に前記シールが接合されると共に、前記内輪の一端部に軸方向に延びる円筒状の肩部が形成され、この肩部に前記シールが摺接されている請求項1または2に記載の車輪用軸受装置。   A shoulder portion extending radially inward is formed at both ends of the outer member, and the seal is joined to the shoulder portion, and a cylindrical shoulder portion extending in the axial direction is formed at one end portion of the inner ring. The wheel bearing device according to claim 1, wherein the seal is in sliding contact with the shoulder portion. 前記ハブ輪の外周に前記複列の外側転走面に対向する一方の内側転走面が直接形成され、この内側転走面から肩部を介して前記小径段部が形成されると共に、前記内輪が外周に前記複列の外側転走面に対向する他方の内側転走面が形成され、その小径側端面が前記肩部に突合せ状態で衝合されている請求項1乃至4いずれかに記載の車輪用軸受装置。   One inner rolling surface facing the outer rolling surface of the double row is directly formed on the outer periphery of the hub wheel, and the small diameter step portion is formed from the inner rolling surface via a shoulder, The inner ring is formed with the other inner rolling surface facing the outer rolling surface of the double row on the outer periphery, and the small-diameter side end surface is abutted against the shoulder portion in a butted state. The wheel bearing device described.
JP2006351742A 2006-11-07 2006-12-27 Wheel bearing device Pending JP2008163979A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2006351742A JP2008163979A (en) 2006-12-27 2006-12-27 Wheel bearing device
CN200780041384XA CN101535664B (en) 2006-11-07 2007-11-06 Bearing device for wheel
PCT/JP2007/001215 WO2008056446A1 (en) 2006-11-07 2007-11-06 Bearing device for wheel
DE112007002599T DE112007002599T5 (en) 2006-11-07 2007-11-06 Wheel bearing device for a vehicle
US12/436,205 US8047722B2 (en) 2006-11-07 2009-05-06 Wheel bearing apparatus for a vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006351742A JP2008163979A (en) 2006-12-27 2006-12-27 Wheel bearing device

Publications (1)

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JP2008163979A true JP2008163979A (en) 2008-07-17

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JP2006351742A Pending JP2008163979A (en) 2006-11-07 2006-12-27 Wheel bearing device

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Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010047057A (en) * 2008-08-19 2010-03-04 Ntn Corp Wheel bearing device and axle module
JP2010047058A (en) * 2008-08-19 2010-03-04 Ntn Corp Wheel bearing device and axle module
JP2010241188A (en) * 2009-04-02 2010-10-28 Ntn Corp Bearing device for wheel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010047057A (en) * 2008-08-19 2010-03-04 Ntn Corp Wheel bearing device and axle module
JP2010047058A (en) * 2008-08-19 2010-03-04 Ntn Corp Wheel bearing device and axle module
JP2010241188A (en) * 2009-04-02 2010-10-28 Ntn Corp Bearing device for wheel

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