JP2005138653A - Bearing device for wheel - Google Patents

Bearing device for wheel Download PDF

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Publication number
JP2005138653A
JP2005138653A JP2003375236A JP2003375236A JP2005138653A JP 2005138653 A JP2005138653 A JP 2005138653A JP 2003375236 A JP2003375236 A JP 2003375236A JP 2003375236 A JP2003375236 A JP 2003375236A JP 2005138653 A JP2005138653 A JP 2005138653A
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Prior art keywords
wheel
inner ring
ring
hub
outer periphery
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JP2003375236A
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JP4152863B2 (en
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Koji Kametaka
晃司 亀高
Hisashi Otsuki
寿志 大槻
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • F16C35/0635—Fixing them on the shaft the bore of the inner ring being of special non-cylindrical shape which co-operates with a complementary shape on the shaft, e.g. teeth, polygonal sections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/527—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to vibration and noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for a wheel, capable of preventing fretting wear on an inner ring width surface of an inside member or the occurrence of bearing backlash, and preventing stick slip sound generated at the time of sudden acceleration, while having a gear for switching drive. <P>SOLUTION: The bearing device for the wheel comprises an outside member 1, the inner side member 2, and a rolling element 3 interposed between a double-row raceway surfaces 1a, 2a of both members 1, 2. The inside member 2 is provided with an inner ring 6 formed with the raceway surface 2a on an in-board side of the double-row raceway surfaces 2a, on an outer periphery of a hub ring 4 having a flange 4a for attaching a wheel on an outer periphery. An outer periphery at the in-board side end of the inner ring 6 is formed on a gear portion 6a. A spline-shaped portion 6b is formed into on an inner periphery of the inner ring 6. The spline-shaped portion 6b is engaged with a spline-shaped portion 4b provided on the outer periphery at the in-board side end of the hub ring 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、自動車等における車輪用軸受装置に関し、特に車輪を駆動・非駆動に切替えるクラッチ機能を有する車輪用軸受装置に関する。   The present invention relates to a wheel bearing device in an automobile or the like, and more particularly to a wheel bearing device having a clutch function for switching a wheel between driving and non-driving.

４輪駆動の自動車には、前輪または後輪を、車輪用軸受装置に備えられたクラッチ機能で選択的に従動輪に切り替え可能としたものがある。このようなクラッチ機能付きの車輪用軸受装置の従来例を図４に示す。この車輪用軸受装置は、車体側に取付けられる外方部材３１と、この外方部材３１の内周の複列の軌道面３１ａに対向する軌道面３２ａを有する内方部材３２と、対向する軌道面３１ａ、３２ａ間に介在した複列の転動体３３とからなる。内方部材３２は、車輪取付用のフランジ３４ａを有するハブ輪３４と、このハブ輪３４の外周に軸方向に並んで嵌合する２つの内輪３５，３６とで構成され、各内輪３５，３６はその外周に各列の軌道面３２ａを有する。   In some four-wheel drive vehicles, a front wheel or a rear wheel can be selectively switched to a driven wheel by a clutch function provided in a wheel bearing device. FIG. 4 shows a conventional example of such a wheel bearing device with a clutch function. The wheel bearing device includes an outer member 31 attached to the vehicle body side, an inner member 32 having a raceway surface 32a facing the double-row raceway surface 31a on the inner periphery of the outer member 31, and an opposing raceway. It consists of a double row rolling element 33 interposed between the surfaces 31a and 32a. The inner member 32 includes a hub ring 34 having a wheel mounting flange 34a, and two inner rings 35, 36 that are fitted to the outer periphery of the hub ring 34 in the axial direction. Has an orbital surface 32a of each row on its outer periphery.

ハブ輪３４の内周には、駆動軸となる等速ジョイント外輪（図示せず）の軸部が、軸受３８，３９を介して回転自在に支持される。ハブ輪３４のインボード側端の外周にはリングギヤ４０がスプライン状部４０ｂで、相対回転が生じないように嵌合されており、等速ジョイント外輪の軸部大径部外周に形成されたギヤ部４２に噛み合うスライドギヤ４３が軸方向にスライドすることにより、このスライドギヤ４３を介してハブ輪３４のリングギヤ４０と等速ジョイント外輪のギヤ部４２とが選択的に連結される。すなわち、連結時には等速ジョイント外輪がハブ輪３４と一体となって、等速ジョイントの回転トルクがハブ輪を介して車輪に伝達される。したがって、ハブ輪３４に取付けられる車輪が駆動輪となる。また、非連結時には等速ジョイント外輪に対してハブ輪３４は回転自在となって、ハブ輪３４に取付けられる車輪は従動輪となる。
このように車輪用軸受装置にクラッチ機能を持たせた場合、エンジンに近い部分にクラッチを設けたものに比べて、従動輪とした場合における車輪の回転が駆動伝達系の余分な箇所まで伝わらず、燃費が優れたものとなる。
米国特許第５９８４４２２号明細書 A shaft portion of a constant velocity joint outer ring (not shown) serving as a drive shaft is rotatably supported on the inner periphery of the hub ring 34 via bearings 38 and 39. A ring gear 40 is fitted on the outer periphery of the inboard side end of the hub wheel 34 by a spline-like portion 40b so as not to cause relative rotation, and a gear formed on the outer periphery of the large-diameter portion of the shaft portion of the constant velocity joint outer ring. When the slide gear 43 meshing with the portion 42 slides in the axial direction, the ring gear 40 of the hub wheel 34 and the gear portion 42 of the constant velocity joint outer ring are selectively connected via the slide gear 43. That is, at the time of connection, the constant velocity joint outer ring is integrated with the hub wheel 34, and the rotational torque of the constant velocity joint is transmitted to the wheel via the hub wheel. Therefore, the wheel attached to the hub wheel 34 becomes a drive wheel. Further, when not connected, the hub wheel 34 is rotatable with respect to the constant velocity joint outer wheel, and the wheel attached to the hub wheel 34 is a driven wheel.
In this way, when the wheel bearing device is provided with a clutch function, the rotation of the wheel in the case of a driven wheel is not transmitted to an extra portion of the drive transmission system, compared with a clutch provided near the engine. , Fuel economy will be excellent.
US Pat. No. 5,984,422

上記構成の車輪用軸受装置では、リングギヤ４０がインボード側の内輪３６の幅面とハブ輪３４のインボード側端の加締部３４ｃとで挟まれて軸方向に固定されているが、リングギヤ４０に等速ジョイントからの駆動力が負荷されるとハブ輪３４が捩じれ、内輪３６とリングギヤ４０とが相互に微小に動いて両部材４０，３６の接触面に摩耗が生じる恐れがある。この摩耗が生じると、内輪３６をクランプする軸力が無くなり、軸受予圧が減少してガタが発生する。また、急発進時には、内輪３６とリングギヤ４０との接触面にスティックスリップが生じ、かん高い異音が発生することがある。   In the wheel bearing device configured as described above, the ring gear 40 is sandwiched between the width surface of the inner ring 36 on the inboard side and the crimping portion 34c at the end of the inboard side of the hub ring 34 and is fixed in the axial direction. When the driving force from the constant velocity joint is applied, the hub ring 34 is twisted, and the inner ring 36 and the ring gear 40 may move minutely to cause wear on the contact surfaces of the members 40 and 36. When this wear occurs, there is no axial force for clamping the inner ring 36, the bearing preload is reduced, and play occurs. Further, at the time of sudden start, stick slip occurs on the contact surface between the inner ring 36 and the ring gear 40, and an unusual noise may occur.

この発明の目的は、駆動切替え用のギヤを有しながら、内方部材の内輪幅面でのフレッティング摩耗や、軸受ガタの発生を防止でき、急発進時に発生するスティックスリップ音も防止できる車輪用軸受装置を提供することである。   The object of the present invention is for a wheel that can prevent fretting wear and bearing play on the inner ring width surface of the inner member and prevent stick-slip noise that occurs at the time of sudden start, while having a drive switching gear. It is to provide a bearing device.

この発明の車輪用軸受装置は、内周に複列の軌道面を有する外方部材と、これら軌道面に対向する軌道面を有する内方部材と、対向する軌道面間に介在した複列の転動体とを備え、車体に対して車輪を回転自在に支持する車輪用軸受装置において、上記内方部材は、外周に車輪取付用のフランジを有するハブ輪の外周に、上記複列の軌道面のうちのインボード側の軌道面を形成した内輪を有し、この内輪のインボード側端の外周をギヤ部に形成し、かつ内周にスプライン状部を形成し、上記ハブ輪のインボード側端の外周にスプライン状部を形成して内輪のスプライン状部と噛み合わせたことを特徴とする。上記スプライン状部は、例えばセレーションであっても良い。
この構成によると、内輪の外周にギヤ部を形成し、内輪をスプライン状部でハブ輪に噛み合わせたため、上記ギヤ部から内方部材に回転を伝達することができ、上記ギヤ部を駆動切替えのための噛み合いクラッチの構成部分として利用することができる。また、専用のリングギヤを設けたものと異なり、内輪に一体にギヤ部を設けたため、内輪の幅面にフレッティング摩耗が生じることがない。そのため、内輪をハブ輪にクランプする軸力の低下が生じず、軸受ガタの発生を防止できる。また急発進時に従来例のように内輪からスティックスリップ音が発生することも防止できる。 The wheel bearing device of the present invention includes an outer member having a double-row raceway surface on the inner periphery, an inner member having a raceway surface facing these raceway surfaces, and a double-row interposed between the opposing raceway surfaces. In the wheel bearing device comprising a rolling element and rotatably supporting a wheel with respect to the vehicle body, the inner member is arranged on the outer periphery of a hub wheel having a wheel mounting flange on the outer periphery, and the double row raceway surface. An inner ring having a raceway surface on the inboard side of the inner ring, the outer periphery of the end of the inboard side of the inner ring is formed in the gear portion, and the spline-like portion is formed in the inner periphery. A spline-like portion is formed on the outer periphery of the side end and meshed with the spline-like portion of the inner ring. The spline-like portion may be serrations, for example.
According to this configuration, the gear portion is formed on the outer periphery of the inner ring, and the inner ring is engaged with the hub wheel by the spline-like portion, so that the rotation can be transmitted from the gear portion to the inner member, and the gear portion is driven and switched. It can be used as a component part of the meshing clutch for Further, unlike the case where a dedicated ring gear is provided, since the gear portion is provided integrally with the inner ring, fretting wear does not occur on the width surface of the inner ring. Therefore, the axial force for clamping the inner ring to the hub ring does not decrease, and the occurrence of bearing play can be prevented. In addition, it is possible to prevent the occurrence of stick-slip noise from the inner ring as in the conventional example when suddenly starting.

この発明において、上記内方部材は、外周に車輪取付用のフランジを有するハブ輪の外周に、アウトボード側の軌道面を形成した内輪を嵌合させ、インボード側の内輪に上記ギヤ部およびスプライン状部を形成したものとしても良い。すなわち、第２世代、または第１世代型の車輪用軸受装置であっても良い。
また、上記内方部材は、外周に車輪取付用のフランジを有するハブ輪のインボード側端の外周に、上記複列の軌道面のうちのアウトボード側の軌道面をハブ輪に直接形成したものであっても良い。すなわち、第３世代型の車輪用軸受装置であっても良い。
この発明の上記各構成ものにおいて、上記転動体は、ボールの他に、例えば円すいころであっても良い。 In this invention, the inner member is formed by fitting an inner ring formed with a raceway surface on the outboard side to the outer periphery of a hub wheel having a wheel mounting flange on the outer periphery, and the gear portion and the inner ring on the inboard side. A spline-like portion may be formed. That is, it may be a second generation or first generation type wheel bearing device.
In addition, the inner member is formed by directly forming the outboard side raceway surface of the double row raceway surface in the hub wheel on the outer periphery of the inboard side end of the hub wheel having a wheel mounting flange on the outer periphery. It may be a thing. That is, it may be a third generation type wheel bearing device.
In each of the above configurations of the present invention, the rolling element may be, for example, a tapered roller in addition to the ball.

この発明において、上記ハブ輪のインボード側端の外周に、内輪のインボード側の幅面を押し付けるフランジ状の加締部を設け、この加締部により内輪をハブ輪に対して軸方向に固定しても良い。
加締部で内輪をハブ輪に固定する構成は、内輪を簡単な構成，作業で固定できる反面、ナット固定に比べると、軸方向の締め付けの確実性に劣るが、このような簡素な加締部を用いても、この発明の内輪にギヤを設けた構成であると、内輪幅面でのフレッティング摩耗や、軸受ガタの発生等が防止される。 In the present invention, a flange-shaped caulking portion that presses the inboard side width surface of the inner ring is provided on the outer periphery of the inboard side end of the hub wheel, and the inner ring is fixed to the hub wheel in the axial direction by the caulking portion. You may do it.
The structure where the inner ring is fixed to the hub ring by the caulking part is simple in structure and can be fixed by work, but it is less reliable in tightening in the axial direction than the nut fixing. Even if the portion is used, if the gear is provided on the inner ring of the present invention, fretting wear on the inner ring width surface, generation of bearing play, and the like are prevented.

この発明における上記各構成において、上記内輪の材質を、炭素含有量が０．３〜０．８％の炭素鋼、浸炭鋼、または軸受鋼であって、軌道面、幅面、内径面、ギヤ部、およびスプライン状部の表面に硬化層を設け、またはずぶ焼入れを施すことで、表面硬さを５８ＨＲＣ以上としても良い。
内輪の軌道面の表面硬さを５８ＨＲＣ以上と硬くすることで、転動寿命が向上する。また、ギヤ部やスプライン状部は、ギヤ部から入力される駆動を伝達する部位であって、接触圧が高く作用し、内輪における他の各表面部分においても、内輪のギヤ部に駆動力が負荷されてハブ輪が捩じれることにより、ハブ輪に対して内輪に微小な動きが起き、強い接触圧で擦れ合うことになる。このようなハブ輪に捩じれ等が生じても、各部の表面硬さが５８ＨＲＣ以上と高くされているため、内輪の摩耗を小さく抑えることができ、軸受ガタの発生をより確実に防止できる。 In each of the above-described configurations according to the present invention, the material of the inner ring is carbon steel, carburized steel, or bearing steel having a carbon content of 0.3 to 0.8%, and includes a raceway surface, a width surface, an inner diameter surface, and a gear portion. The surface hardness may be set to 58 HRC or more by providing a hardened layer on the surface of the spline-like portion or by performing quenching.
By making the surface hardness of the raceway surface of the inner ring as hard as 58 HRC or more, the rolling life is improved. Further, the gear part and the spline-like part are parts that transmit the drive input from the gear part, and the contact pressure acts high, and the driving force is also applied to the gear part of the inner ring at each of the other surface portions of the inner ring. When the hub wheel is loaded and twisted, a slight movement occurs in the inner ring with respect to the hub wheel, and the hub wheel is rubbed with a strong contact pressure. Even when such a hub ring is twisted, the surface hardness of each part is increased to 58 HRC or more, so that wear of the inner ring can be suppressed to a small extent, and the occurrence of bearing play can be prevented more reliably.

また、この発明における上記各構成の場合に、上記ハブ輪のインボード側端の外周に、内輪のインボード側の幅面を押し付けるフランジ状の加締部を設け、この加締部により内輪をハブ輪に対して軸方向に固定し、ハブ輪の材質を、炭素含有量が０．３〜０．８％の炭素鋼、浸炭鋼、または軸受鋼とし、フランジの基部からインボード側端のスプライン状部までの部分に表面硬さが５８ＨＲＣ以上の硬化層を設け、上記加締部は硬化層の未形成部分として母材硬さを２５ＨＲＣ以下としても良い。
ハブ輪においても、そのフランジの基部からインボード側端のスプライン状部までの部分の表面硬さを５８ＨＲＣ以上と硬くすることで、接触に対する摩耗や、剛性向上の面で好ましい。上記加締部は、２５ＨＲＣ以下と柔らかいことが、加締作業の容易性や、加締時の亀裂防止等のために好ましい。 In addition, in the case of each of the above-described configurations of the present invention, a flange-shaped caulking portion that presses the inboard side width surface of the inner ring is provided on the outer periphery of the inboard side end of the hub wheel, and the inner ring is hubped by the caulking portion. The hub ring is made of carbon steel, carburized steel, or bearing steel with a carbon content of 0.3 to 0.8%. The spline extends from the base of the flange to the inboard side end. A hardened layer having a surface hardness of 58 HRC or more may be provided in a portion up to the shape part, and the base material hardness may be 25 HRC or less as an unformed portion of the hardened layer.
Also in the hub wheel, by making the surface hardness of the portion from the base of the flange to the spline-like portion at the inboard side end as 58 HRC or more, it is preferable in terms of wear against contact and improvement of rigidity. The caulking portion is preferably as soft as 25 HRC or less for ease of caulking work, prevention of cracks during caulking, and the like.

この発明の車輪用軸受装置は、内周に複列の軌道面を有する外方部材と、これら軌道面に対向する軌道面を有する内方部材と、対向する軌道面間に介在した複列の転動体とを備え、車体に対して車輪を回転自在に支持する車輪用軸受装置において、上記内方部材が、外周に車輪取付用のフランジを有するハブ輪の外周に、上記複列の軌道面のうちのインボード側の軌道面を形成した内輪を有し、この内輪のインボード側端の外周をギヤ部に形成し、かつ内周にスプライン状部を形成し、上記ハブ輪のインボード側端の外周にスプライン状部を形成して上記内輪のスプライン状部とかみ合わせたため、駆動切替え用のギヤを有しながら、内方部材の内輪幅面でのフレッティング摩耗や、軸受ガタの発生を防止でき、急発進時に発生するスティックスリップ音も防止することができる。   The wheel bearing device of the present invention includes an outer member having a double-row raceway surface on the inner periphery, an inner member having a raceway surface facing these raceway surfaces, and a double-row interposed between the opposing raceway surfaces. In the wheel bearing device comprising a rolling element and rotatably supporting a wheel with respect to the vehicle body, the inner member is arranged on the outer periphery of a hub wheel having a wheel mounting flange on the outer periphery, and the double row raceway surface An inner ring having a raceway surface on the inboard side of the inner ring, the outer periphery of the end of the inboard side of the inner ring is formed in the gear portion, and the spline-like portion is formed in the inner periphery. Since the spline-shaped part is formed on the outer periphery of the side end and meshed with the spline-shaped part of the inner ring, fretting wear on the inner ring width surface of the inner member and bearing backlash are generated while having a drive switching gear. This is a sticker that can be prevented It is also possible to prevent slip sound.

この発明の第１の実施形態を図１と共に説明する。なお、この明細書において、車輪に組み付けた状態で車両の外側寄りとなる側をアウトボード側といい、車両の中央寄りとなる側をインボード側という。この実施形態の車輪用軸受装置は、車輪を駆動・非駆動に切り替えるクラッチ機能のためのギヤ付きのものであって、第２世代に分類されるものである。この車輪用軸受装置は、内周に複列の軌道面１ａを有する外方部材１と、これら軌道面１ａにそれぞれ対向する軌道面２ａを有する内方部材２と、これら複列の軌道面１ａ，２ａ間に介在した複列の転動体３とを備え、車体に対して車輪を回転自在に支持する。転動体３は円すいころからなり、各列毎に保持器７で保持されている。軌道面１ａ，２ａは、接触角が背面合わせとなるように形成されている。外方部材１は固定側の部材となるものであって、外周に車体取付フランジ１ｂを有する一体の部材である。内方部材２は回転側の部材となるものであって、外周のアウトボード側端に車輪取付フランジ４ａを有するハブ輪４と、このハブ輪４の外周に軸方向に並べて嵌合された２個の内輪５，６とを有する。これら内輪５，６の外周には、上記各列の軌道面２ａが形成されている。ハブ輪４の車輪取付フランジ４ａには、車輪（図示せず）がボルト１８で取付けられる。ハブ輪４の内周には、等速ジョイント外輪（図示せず）の軸部が軸受８，９を介して回転自在に支持される。内外の部材２，１間に形成される環状空間の両端は一対のシール部材１０，１１で密封されている。   A first embodiment of the present invention will be described with reference to FIG. In this specification, the side closer to the outer side of the vehicle in a state assembled to the wheels is referred to as the outboard side, and the side closer to the center of the vehicle is referred to as the inboard side. The wheel bearing device of this embodiment is equipped with a gear for a clutch function for switching a wheel between driving and non-driving, and is classified as a second generation. The wheel bearing device includes an outer member 1 having double-row raceway surfaces 1a on the inner periphery, an inner member 2 having raceway surfaces 2a facing the raceway surfaces 1a, and these double-row raceway surfaces 1a. , 2a and a double-row rolling element 3 interposed between the two wheels 2a and 2b, and rotatably supports the wheel relative to the vehicle body. The rolling element 3 is formed of a tapered roller and is held by a cage 7 for each row. The raceway surfaces 1a and 2a are formed so that the contact angles are aligned with the back surface. The outer member 1 is a member on the fixed side, and is an integral member having a vehicle body mounting flange 1b on the outer periphery. The inner member 2 is a member on the rotation side, and is a hub wheel 4 having a wheel mounting flange 4a at an outer board end on the outer periphery, and 2 fitted side by side in the axial direction on the outer periphery of the hub wheel 4. The inner rings 5 and 6 are provided. On the outer peripheries of the inner rings 5 and 6, the raceway surfaces 2a of the respective rows are formed. A wheel (not shown) is attached to the wheel attachment flange 4 a of the hub wheel 4 with bolts 18. A shaft portion of a constant velocity joint outer ring (not shown) is rotatably supported via bearings 8 and 9 on the inner periphery of the hub wheel 4. Both ends of the annular space formed between the inner and outer members 2 and 1 are sealed with a pair of seal members 10 and 11.

ハブ輪４の外周の２個の内輪５，６のうち、インボード側の内輪６は、インボード側端の外周がギヤ部６ａに形成され、かつ内周のインボード側端の部分にスプライン状部６ｂが形成されている。ハブ輪４のインボード側端の外周にはスプライン状部４ｂが形成され、このスプライン状部４ｂに上記内輪６のスプライン状部６ｂが噛み合わされる。ハブ輪４のインボード側端は、内輪６の幅面を押し付けるフランジ状の加締部４ｃとされ、この加締部４ｃにより内輪６がハブ輪４に対して軸方向に締め付け固定される。内輪６のギヤ部６ａには、等速ジョイント外輪の軸部大径部に形成されたギヤ部１２と噛み合うリング状のスライドギヤ１３が、軸方向へのスライドによって選択的に噛み合う。スライドギヤ１３を介して、内輪６のギヤ部６ａと等速ジョイント外輪のギヤ部１２とが連結された状態で、駆動力が等速ジョイント外輪から内輪６およびハブ輪４を介して車輪に伝達される。すなわち、このときハブ輪４に支持される車輪は駆動輪となる。スライドギヤ１３が内輪６のギヤ部６ａに噛み合わない状態では、駆動力が車輪に伝達されず、このときハブ輪４に支持される車輪は従動輪となる。   Of the two inner rings 5, 6 on the outer periphery of the hub wheel 4, the inner ring 6 on the inboard side has an outer periphery on the inboard side end formed in the gear portion 6a, and splines on the inner periphery on the inboard side end portion. A shaped portion 6b is formed. A spline-like portion 4b is formed on the outer periphery of the inboard side end of the hub wheel 4, and the spline-like portion 6b of the inner ring 6 is engaged with the spline-like portion 4b. The inboard side end of the hub wheel 4 is a flange-shaped caulking portion 4c that presses the width surface of the inner ring 6, and the inner ring 6 is clamped and fixed to the hub wheel 4 in the axial direction by the caulking portion 4c. A ring-shaped slide gear 13 that meshes with the gear portion 12 formed on the large-diameter portion of the shaft portion of the constant velocity joint outer ring is selectively meshed with the gear portion 6a of the inner ring 6 by sliding in the axial direction. A driving force is transmitted from the constant velocity joint outer ring to the wheels via the inner ring 6 and the hub wheel 4 in a state where the gear portion 6a of the inner ring 6 and the gear portion 12 of the constant velocity joint outer ring are connected via the slide gear 13. Is done. That is, the wheel supported by the hub wheel 4 at this time becomes a driving wheel. In a state where the slide gear 13 is not meshed with the gear portion 6a of the inner ring 6, the driving force is not transmitted to the wheel, and the wheel supported by the hub wheel 4 at this time is a driven wheel.

ハブ輪４の外周の２個の内輪５，６のうち、アウトボード側の内輪５のインボード側端の外周には、環状のパルサリング１４が装着され、外方部材１には上記パルサリング１４に対峙する回転センサ１５が外周から内周に貫通して設置されている。パルサリング１４は、例えば円周方向に並べて磁極Ｎ，Ｓを設けた多極磁石からなる。回転センサ１５はホール素子等からなり、内方部材２の回転に伴うパルサリング１４の磁極変化を検出してセンサ信号として出力する。   Of the two inner rings 5 and 6 on the outer periphery of the hub wheel 4, an annular pulsar ring 14 is mounted on the outer periphery of the inboard side end of the inner ring 5 on the outboard side, and the outer member 1 is attached to the pulsar ring 14. Opposing rotation sensors 15 are installed so as to penetrate from the outer periphery to the inner periphery. The pulsar ring 14 is composed of, for example, a multipolar magnet provided with magnetic poles N and S arranged in the circumferential direction. The rotation sensor 15 is composed of a Hall element or the like, and detects a change in the magnetic pole of the pulsar ring 14 accompanying the rotation of the inner member 2 and outputs it as a sensor signal.

内輪５，６およびハブ輪４の材質は、いずれも、炭素含有量が０．３〜０．８％の炭素鋼、浸炭鋼、または軸受鋼とされる。特に、インボード側の内輪６は、その軌道面２ａ、幅面、内径面、ギヤ部６ａ、およびスプライン状部６ｂの表面に硬化層１６が設けられ、これにより表面硬さが５８ＨＲＣ以上とされている。硬化層１６を設けるのに代えて、ずぶ焼入れを施して、表面硬さを５８ＨＲＣ以上としても良い。また、ハブ輪４における車輪取付フランジ４ａの基部からインボード側端のスプライン状部４ｂまでの部分にも、表面硬さが５８ＨＲＣ以上の硬化層１７が設けられている。ハブ輪４の加締部４ｃは、硬化層１７の未形成部分とし、その母材の硬さは２５ＨＲＣ以下とされている。   The inner rings 5 and 6 and the hub ring 4 are all made of carbon steel, carburized steel, or bearing steel having a carbon content of 0.3 to 0.8%. In particular, the inner ring 6 on the inboard side is provided with the hardened layer 16 on the surfaces of the raceway surface 2a, the width surface, the inner diameter surface, the gear portion 6a, and the spline-like portion 6b, and thereby the surface hardness is 58 HRC or more. Yes. Instead of providing the hardened layer 16, the surface hardness may be set to 58 HRC or more by performing quenching. Further, a hardened layer 17 having a surface hardness of 58 HRC or more is also provided in a portion from the base portion of the wheel mounting flange 4 a to the spline-like portion 4 b at the inboard side end in the hub wheel 4. The caulking portion 4c of the hub wheel 4 is an unformed portion of the hardened layer 17, and the base material has a hardness of 25 HRC or less.

この構成の車輪用軸受装置によると、ハブ輪４の外周にスプライン嵌合される内輪６のインボード側端の外周に、等速ジョイント外輪のギヤ部１２に噛み合うスライドギヤ１３と噛合可能なギヤ部６ａを形成しているので、ギヤ部６ａへのスライドギヤ１３の噛み合いの有無により、クラッチ機能を持たせることができる。また、このギヤ部６ａは、内輪６に一体に設けているため、従来の内輪の幅面にリングギヤが接するものと異なり、フレッティング摩耗が生じることがない。このため、内輪６をハブ輪４にクランプする軸力を十分に確保できて軸受ガタの発生を防止できる。また、急発進時に従来例のように内輪６からスティックスリップ音が発生するのも防止できる。   According to the wheel bearing device of this configuration, the gear that can mesh with the slide gear 13 that meshes with the gear portion 12 of the constant velocity joint outer ring on the outer periphery of the inboard side end of the inner ring 6 that is spline-fitted to the outer periphery of the hub wheel 4. Since the portion 6a is formed, a clutch function can be provided depending on whether or not the slide gear 13 is engaged with the gear portion 6a. Further, since the gear portion 6a is provided integrally with the inner ring 6, fretting wear does not occur unlike a conventional ring gear in contact with the width surface of the inner ring. For this reason, the axial force which clamps the inner ring | wheel 6 to the hub ring | wheel 4 can fully be ensured, and generation | occurrence | production of a bearing play can be prevented. Further, it is possible to prevent the stick-slip noise from being generated from the inner ring 6 as in the prior art when suddenly starting.

内輪６は、ハブ輪４に対して加締部４ｃにより固定しているが、このような簡素な固定構造であっても、内輪６にギヤ部６ａを一体に設けているため、ギヤ部６ａの負荷にかかわらず、内輪６の確実な固定が行える。   The inner ring 6 is fixed to the hub wheel 4 by the caulking portion 4c. However, even with such a simple fixing structure, the gear portion 6a is provided integrally with the inner ring 6 and thus the gear portion 6a. The inner ring 6 can be reliably fixed regardless of the load.

内輪６は、その材質を、炭素含有量が０．３〜０．８％の炭素鋼、浸炭鋼、または軸受鋼とし、軌道面２ａ、幅面、内径面、ギヤ部６ａ、およびスプライン状部６ｂの表面に硬化層１６を設けるか、またはずぶ焼入れを施することで、表面硬さを５８ＨＲＣとしているので、転動寿命および各部の耐摩耗性の面で優れたものとなる。すなわち、軌道面２ａにおける転動寿命に優れ、また内輪６のギヤ部６ａに駆動力が負荷されてハブ輪４が捩じれることにより内輪６に微小な動きが起きても、内輪６の摩耗が小さく抑えられ、軸受ガタの発生をより確実に防止できる。   The inner ring 6 is made of carbon steel, carburized steel, or bearing steel having a carbon content of 0.3 to 0.8%, and the raceway surface 2a, width surface, inner diameter surface, gear portion 6a, and spline-like portion 6b. Since the surface hardness is set to 58 HRC by providing the hardened layer 16 on the surface of the steel plate or by quenching it, it is excellent in terms of rolling life and wear resistance of each part. That is, it has an excellent rolling life on the raceway surface 2a, and even if a minute movement occurs in the inner ring 6 due to the driving force being applied to the gear portion 6a of the inner ring 6 and the hub ring 4 being twisted, the inner ring 6 is worn away. It is possible to suppress the bearing play more reliably.

また、ハブ輪４の材質も、炭素含有量が０．３〜０．８％の炭素鋼、浸炭鋼、または軸受鋼とし、車輪取付フランジ４ａの基部からインボード側端のスプライン状部４ｂまでの部分に表面硬さが５８ＨＲＣ以上の硬化層１７を設けているので、内輪５，６の微小な動きに起因するハブ輪４の摩耗も抑えることができ、軸受ガタの発生をより確実に防止できる。ハブ輪４の加締部４ｃは硬化層１７の未形成部分としているので、ハブ輪４のインボード側端を加締めて加締部４ｃとする処理を容易に行うことができる。   The hub wheel 4 is also made of carbon steel, carburized steel, or bearing steel having a carbon content of 0.3 to 0.8%, from the base of the wheel mounting flange 4a to the spline-like part 4b on the inboard side end. Since the hardened layer 17 having a surface hardness of 58 HRC or more is provided in this portion, it is possible to suppress wear of the hub ring 4 caused by minute movements of the inner rings 5 and 6, and to prevent bearing play more reliably. it can. Since the caulking portion 4c of the hub wheel 4 is an unformed portion of the hardened layer 17, it is possible to easily perform the process of caulking the inboard side end of the hub wheel 4 to form the caulking portion 4c.

図２はこの発明の第２の実施形態を示す。この車輪用軸受装置は第３世代に分類されるものである。この実施形態の場合、図１に示す第１の実施形態において、２つの内輪５，６のうちアウトボード側の内輪５が省略されて、内方部材２はハブ輪４と内輪６とで構成される。内方部材２のアウトボード側の軌道面２ａは、ハブ輪４の外周に直接形成し、インボード側の軌道面２ａは内輪６の外周にそれぞれ形成される。その他の構成，効果は第１の実施形態の場合と同じである。   FIG. 2 shows a second embodiment of the present invention. This wheel bearing device is classified as a third generation. In the case of this embodiment, in the first embodiment shown in FIG. 1, the inner ring 5 on the outboard side of the two inner rings 5 and 6 is omitted, and the inner member 2 is constituted by the hub ring 4 and the inner ring 6. Is done. The outboard side raceway surface 2 a of the inner member 2 is directly formed on the outer periphery of the hub wheel 4, and the inboard side raceway surface 2 a is formed on the outer periphery of the inner ring 6. Other configurations and effects are the same as those in the first embodiment.

なお、上記各実施形態では、ハブ輪４に対してインボード側の内輪６を軸方向に固定するのに、ハブ輪４の外周のインボード側端に設けた加締部４ｃを内輪６の幅面に押し付けているが、これに代えて図３に示すように、ハブ輪４の外周のインボード側端に形成した雄ねじ部１９にナット２０を螺合させ、このナット２０の締め付けにより、内輪６をハブ輪４に軸方向に固定しても良い。   In each of the above embodiments, in order to fix the inner ring 6 on the inboard side to the hub wheel 4 in the axial direction, the crimping portion 4 c provided on the inboard side end of the outer periphery of the hub wheel 4 is provided on the inner ring 6. Although pressed against the width surface, instead of this, as shown in FIG. 3, a nut 20 is screwed into a male screw portion 19 formed on the inboard side end of the outer periphery of the hub wheel 4, and the inner ring is tightened by tightening the nut 20. 6 may be fixed to the hub wheel 4 in the axial direction.

この発明の第１の実施形態にかかる車輪用軸受装置の断面図である。It is sectional drawing of the wheel bearing apparatus concerning 1st Embodiment of this invention. この発明の第２の実施形態にかかる車輪用軸受装置の断面図である。It is sectional drawing of the wheel bearing apparatus concerning 2nd Embodiment of this invention. ハブ輪に対する内輪の軸方向の固定構造の他の例を示す部分断面図である。It is a fragmentary sectional view which shows the other example of the fixing structure of the axial direction of the inner ring with respect to a hub ring. 従来例の断面図である。It is sectional drawing of a prior art example.

符号の説明Explanation of symbols

１…外方部材
２…内方部材
１ａ，２ａ…軌道面
３…転動体
４…ハブ輪
４ａ…車輪取付フランジ
４ｂ…スプライン状部
４ｃ…加締部
５，６…内輪
６ａ…ギヤ部
６ｂ…スプライン状部
１６，１７…硬化層 DESCRIPTION OF SYMBOLS 1 ... Outer member 2 ... Inner member 1a, 2a ... Raceway surface 3 ... Rolling element 4 ... Hub wheel 4a ... Wheel mounting flange 4b ... Spline-like part 4c ... Clamping part 5, 6 ... Inner ring 6a ... Gear part 6b ... Spline-like parts 16, 17 ... hardened layer

Claims (7)

内周に複列の軌道面を有する外方部材と、これら軌道面に対向する軌道面を有する内方部材と、対向する軌道面間に介在した複列の転動体とを備え、車体に対して車輪を回転自在に支持する車輪用軸受装置において、
上記内方部材は、外周に車輪取付用のフランジを有するハブ輪の外周に、上記複列の軌道面のうちのインボード側の軌道面を形成した内輪を有し、この内輪のインボード側端の外周をギヤ部に形成し、かつ内周にスプライン状部を形成し、上記ハブ輪のインボード側端の外周にスプライン状部を形成して上記内輪のスプライン状部と噛み合わせたことを特徴とする車輪用軸受装置。 An outer member having a double-row raceway surface on the inner periphery, an inner member having a raceway surface facing these raceway surfaces, and a double-row rolling element interposed between the opposing raceway surfaces, In the wheel bearing device for rotatably supporting the wheel,
The inner member has an inner ring in which an inboard side raceway surface of the double row raceway surfaces is formed on the outer circumference of a hub wheel having a wheel mounting flange on the outer circumference. The outer periphery of the end is formed in the gear portion, the spline-shaped portion is formed on the inner periphery, the spline-shaped portion is formed on the outer periphery of the inboard side end of the hub wheel, and meshed with the spline-shaped portion of the inner ring. A wheel bearing device characterized by the above. 請求項１において、上記内方部材は、外周に車輪取付用のフランジを有するハブ輪の外周に、アウトボード側の軌道面を形成した内輪を嵌合させ、インボード側の内輪に上記ギヤ部およびスプライン状部を形成した車輪用軸受装置。   2. The inner member according to claim 1, wherein the inner ring is formed by fitting an inner ring formed with a raceway surface on the outboard side to an outer circumference of a hub ring having a wheel mounting flange on the outer circumference, and the inner ring on the inboard side. And a wheel bearing device in which a spline-like portion is formed. 請求項１において、上記内方部材は、外周に車輪取付用のフランジを有するハブ輪のインボード側端の外周に、上記複列の軌道面のうちのアウトボード側の軌道面をハブ輪に直接形成したものである車輪用軸受装置。   2. The inner member according to claim 1, wherein the inner ring has an outer periphery on an inboard side end of a hub wheel having a wheel mounting flange on an outer periphery, and an outboard side track surface of the double-row track surface is a hub ring. A bearing device for wheels that is formed directly. 請求項１ないし請求項３のいずれかにおいて、上記ハブ輪のインボード側端の外周に、内輪のインボード側の幅面を押し付けるフランジ状の加締部を設け、この加締部により内輪をハブ輪に対して軸方向に固定した車輪用軸受装置。   4. A flange-shaped caulking portion that presses a width surface on the inboard side of the inner ring is provided on an outer periphery of the inboard side end of the hub wheel according to any one of claims 1 to 3. Wheel bearing device fixed in the axial direction with respect to the wheel. 請求項１ないし請求項４のいずれかにおいて、上記転動体が円すいころである車輪用軸受装置。   5. The wheel bearing device according to claim 1, wherein the rolling element is a tapered roller. 請求項１ないし請求項５のいずれかにおいて、上記内輪の材質を、炭素含有量が０．３〜０．８％の炭素鋼、浸炭鋼、または軸受鋼であって、軌道面、幅面、内径面、ギヤ部、およびスプライン状部の表面に硬化層を設け、またはずぶ焼入れを施すことで、表面硬さを５８ＨＲＣ以上とした車輪用軸受装置。   The material of the inner ring according to any one of claims 1 to 5, wherein the inner ring is made of carbon steel, carburized steel, or bearing steel having a carbon content of 0.3 to 0.8%, the raceway surface, the width surface, and the inner diameter. A wheel bearing device having a surface hardness of 58 HRC or more by providing a hardened layer on the surfaces of the surface, the gear portion, and the spline-like portion, or by performing quenching. 請求項１ないし請求項６のいずれかにおいて、上記ハブ輪のインボード側端の外周に、内輪のインボード側の幅面を押し付けるフランジ状の加締部を設け、この加締部により内輪をハブ輪に対して軸方向に固定し、ハブ輪の材質を、炭素含有量が０．３〜０．８％の炭素鋼、浸炭鋼、または軸受鋼とし、フランジの基部からインボード側端のスプライン状部までの部分に表面硬さが５８ＨＲＣ以上の硬化層を設け、上記加締部は硬化層の未形成部分として母材硬さを２５ＨＲＣ以下とした車輪用軸受装置。   7. The flange according to claim 1, wherein a flange-shaped caulking portion that presses the inboard side width surface of the inner ring is provided on an outer periphery of the inboard side end of the hub wheel, and the inner ring is hubped by the caulking portion. The hub ring is made of carbon steel, carburized steel, or bearing steel with a carbon content of 0.3 to 0.8%. The spline extends from the base of the flange to the inboard side end. A wheel bearing device in which a hardened layer having a surface hardness of 58 HRC or more is provided in a portion up to the shape portion, and the base material hardness is 25 HRC or less as a portion in which the hardened layer is not formed.
JP2003375236A 2003-11-05 2003-11-05 Wheel bearing device Expired - Fee Related JP4152863B2 (en)

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Cited By (12)

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WO2005085665A1 (en) * 2004-03-03 2005-09-15 Nsk Ltd. Hub unit for wheel
JP2005257012A (en) * 2004-03-12 2005-09-22 Nsk Ltd Bearing device for wheel
JP2007153105A (en) * 2005-12-05 2007-06-21 Ntn Corp Wheel bearing device, and its manufacturing method
JP2008039106A (en) * 2006-08-08 2008-02-21 Ntn Corp Bearing device for wheel
JP2008144832A (en) * 2006-12-08 2008-06-26 Ntn Corp Bearing device for wheel
US8210752B2 (en) 2007-09-26 2012-07-03 Jtekt Corporation Wheel supporting device
US8221004B2 (en) 2007-01-17 2012-07-17 Ntn Corporation Method of making wheel support bearing
JP2013154697A (en) * 2012-01-27 2013-08-15 Ntn Corp Bearing device for wheel, and method for manufacturing the same
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US8745874B2 (en) 2005-12-05 2014-06-10 Ntn Corporation Method of manufacturing wheel support bearing assembly
WO2024128842A1 (en) * 2022-12-14 2024-06-20 주식회사 일진글로벌 Vehicle wheel bearing

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005085665A1 (en) * 2004-03-03 2005-09-15 Nsk Ltd. Hub unit for wheel
US7677807B2 (en) 2004-03-03 2010-03-16 Nsk Ltd. Hub unit for wheel
JP4538844B2 (en) * 2004-03-12 2010-09-08 日本精工株式会社 Wheel bearing device
JP2005257012A (en) * 2004-03-12 2005-09-22 Nsk Ltd Bearing device for wheel
JP2007153105A (en) * 2005-12-05 2007-06-21 Ntn Corp Wheel bearing device, and its manufacturing method
US8745874B2 (en) 2005-12-05 2014-06-10 Ntn Corporation Method of manufacturing wheel support bearing assembly
JP2008039106A (en) * 2006-08-08 2008-02-21 Ntn Corp Bearing device for wheel
US8142081B2 (en) 2006-08-08 2012-03-27 Ntn Corporation Wheel support bearing assembly
JP2008144832A (en) * 2006-12-08 2008-06-26 Ntn Corp Bearing device for wheel
US8221004B2 (en) 2007-01-17 2012-07-17 Ntn Corporation Method of making wheel support bearing
US8210752B2 (en) 2007-09-26 2012-07-03 Jtekt Corporation Wheel supporting device
EP2503165A3 (en) * 2011-03-24 2013-11-06 JTEKT Corporation Vehicle bearing device
JP2013154697A (en) * 2012-01-27 2013-08-15 Ntn Corp Bearing device for wheel, and method for manufacturing the same
JP2014020404A (en) * 2012-07-13 2014-02-03 Ntn Corp Wheel bearing device
WO2024128842A1 (en) * 2022-12-14 2024-06-20 주식회사 일진글로벌 Vehicle wheel bearing

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