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JP2011121584A - Rolling bearing unit for wheel - Google Patents

Rolling bearing unit for wheel Download PDF

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Publication number
JP2011121584A
JP2011121584A JP2011004114A JP2011004114A JP2011121584A JP 2011121584 A JP2011121584 A JP 2011121584A JP 2011004114 A JP2011004114 A JP 2011004114A JP 2011004114 A JP2011004114 A JP 2011004114A JP 2011121584 A JP2011121584 A JP 2011121584A
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Japan
Prior art keywords
cover member
outer ring
wheel
rolling bearing
cylindrical portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2011004114A
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Japanese (ja)
Inventor
Hiroshi Yano
広 矢野
Tomoyuki Aida
友之 合田
Katsutaka Tsumura
勝敬 津村
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JTEKT Corp
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JTEKT Corp
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Publication date
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Priority to JP2011004114A priority Critical patent/JP2011121584A/en
Publication of JP2011121584A publication Critical patent/JP2011121584A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
    • 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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

【課題】外輪部材に樹脂製のカバー部材を嵌合固定するのに、該嵌合を補強する補強部材がカバー部材との熱膨張、熱収縮の相違により、当該カバー部材から容易に抜け出さないようにすること。
【解決手段】本車輪用転がり軸受装置１は、外輪部材２の端部に嵌合固定されて当該車輪用転がり軸受装置の軸方向開口部を覆う樹脂製のカバー部材２５を備える。カバー部材は、外輪部材の端部の内周面に嵌合する円筒部２６と環状部２７とを備え、円筒部の内周側に金属製の環状部材３３が設けられている。この環状部材には、端部を径方向外方に折り曲げてなる突出部４６を備え、上記突出部は上記カバー部材に係合する。
【選択図】図４When a resin cover member is fitted and fixed to an outer ring member, a reinforcing member that reinforces the fitting does not easily come out of the cover member due to a difference in thermal expansion and contraction from the cover member. To do.
A rolling bearing device for a wheel according to the present invention includes a resin cover member that is fitted and fixed to an end of an outer ring member and covers an axial opening of the rolling bearing device for a wheel. The cover member includes a cylindrical portion 26 and an annular portion 27 that are fitted to the inner peripheral surface of the end portion of the outer ring member, and a metal annular member 33 is provided on the inner peripheral side of the cylindrical portion. The annular member is provided with a protruding portion 46 formed by bending an end portion radially outward, and the protruding portion engages with the cover member.
[Selection] Figure 4

Description

本発明は、自動車等の車輪を懸架装置に回転自在に支持する車輪用転がり軸受装置にかかり、より詳しくは、軸受内部に泥水などが侵入するのを防止するためのカバー部材を備えた車輪用転がり軸受装置に関する。   The present invention relates to a rolling bearing device for a wheel that rotatably supports a wheel of an automobile or the like on a suspension device, and more specifically, for a wheel provided with a cover member for preventing muddy water from entering the inside of the bearing. The present invention relates to a rolling bearing device.

車両のアンチロックブレーキシステム(ＡＢＳ)やトラクションコントロールシステム(ＴＣＳ)を制御するために、車輪の回転速度等を検出する必要がある。特許文献１に開示されている車輪用転がり軸受装置では、固定輪である外輪部材にカバー部材を介して回転検出装置が組み込まれている。   In order to control the anti-lock brake system (ABS) and the traction control system (TCS) of the vehicle, it is necessary to detect the rotational speed of the wheels. In the wheel rolling bearing device disclosed in Patent Document 1, a rotation detection device is incorporated into an outer ring member that is a fixed ring via a cover member.

特開２００３−１３９８２号JP2003-13982A

上記車輪用転がり軸受装置では、その使用中の振動や温度変動という苛酷な環境下でも、回転検出装置をカバー部材を介して外輪部材に確実に組み付ける必要がある。   In the rolling bearing device for a wheel described above, it is necessary to reliably assemble the rotation detecting device to the outer ring member via the cover member even under a severe environment such as vibration and temperature fluctuation during use.

本発明による車輪用転がり軸受装置は、外輪部材の端部に嵌合固定されて当該車輪用転がり軸受装置の軸方向開口部を覆う樹脂製のカバー部材を備えた車輪用転がり軸受装置であって、上記カバー部材は、外輪部材の端部の内周面に嵌合する円筒部と、車両アウタ側端面が上記外輪部材の車両インナ側端面に軸方向において当接する環状部とを備え、上記円筒部の内周側に金属製の環状部材が設けられ、上記環状部材は、当該環状部材の端部を径方向外方に向けて折り曲げてなる突出部を備え、上記突出部は上記円筒部に埋設され、当該突出部の車両インナ側端面および車両アウタ側端面が上記円筒部に軸方向で係止されていることを特徴とするものである。   A wheel rolling bearing device according to the present invention is a wheel rolling bearing device provided with a resin cover member that is fitted and fixed to an end of an outer ring member and covers an axial opening of the wheel rolling bearing device. The cover member includes a cylindrical portion that is fitted to the inner peripheral surface of the end portion of the outer ring member, and an annular portion in which the vehicle outer side end surface is in contact with the vehicle inner side end surface of the outer ring member in the axial direction. An annular member made of metal is provided on the inner peripheral side of the part, and the annular member is provided with a protruding part formed by bending an end part of the annular member outward in the radial direction, and the protruding part is formed on the cylindrical part. It is embedded, and the vehicle inner side end surface and the vehicle outer side end surface of the projecting portion are locked to the cylindrical portion in the axial direction.

上記カバー部材は、その全体を樹脂製としたものだけに限定されるものではなく外輪部材との嵌合部である円筒部を樹脂製としたものを含む。   The cover member is not limited to one made entirely of resin, but includes one made of resin in a cylindrical portion that is a fitting portion with the outer ring member.

本発明によると、カバー部材を外輪部材の端部に嵌合固定した状態では、その嵌合部である円筒部の内周側に環状部材が設けられ、かつ、その環状部材の突出部がカバー部材に係合しているから、樹脂製であるカバー部材と金属製である環状部材との線膨張係数の相違による当該両者間に過大な熱膨張差や熱収縮差が生じても、環状部材がカバー部材から抜け出すおそれが無くなる。その結果、外輪部材に対するカバー部材の円筒部の嵌合力を高くしなくても、あるいはその嵌合力が低下してきても、カバー部材が外輪部材から容易に抜け出すことを効果的に防止することができる。   According to the present invention, in a state in which the cover member is fitted and fixed to the end portion of the outer ring member, the annular member is provided on the inner peripheral side of the cylindrical portion that is the fitting portion, and the protruding portion of the annular member covers Even if an excessive thermal expansion difference or thermal contraction difference occurs between the cover member made of resin and the annular member made of metal due to the difference in linear expansion coefficient, the annular member is engaged with the member. There is no possibility that the cover will come out of the cover member. As a result, even if the fitting force of the cylindrical portion of the cover member with respect to the outer ring member is not increased or the fitting force is reduced, the cover member can be effectively prevented from easily coming out of the outer ring member. .

上記環状部材の突出部を、径方向外向きに直線的に延びる突出部等により構成した場合では、環状部材を強固にカバー部材に係合させて当該カバー部材からの抜け出しを有効に防止することができる。   When the projecting portion of the annular member is configured by a projecting portion or the like that linearly extends radially outward, the annular member is firmly engaged with the cover member to effectively prevent the annular member from coming out of the cover member. Can do.

本発明によれば、カバー部材に環状部材の突出部に係合させて当該環状部材がカバー部材から抜け出すのを確実に防止することができる。   According to the present invention, it is possible to reliably prevent the annular member from coming out of the cover member by engaging the cover member with the protruding portion of the annular member.

参考の形態に係る車輪用転がり軸受装置の全体断面図Whole sectional view of rolling bearing device for wheels according to reference form 他の参考の形態の車輪用転がり軸受装置の全体断面図Whole sectional view of rolling bearing device for wheel of other reference form 同環状部材の拡大斜視図Enlarged perspective view of the annular member 本発明の最良の形態の車輪用転がり軸受装置の全体断面図Whole sectional view of rolling bearing device for wheel of the best form of the present invention

以下、参考の形態および本発明の最良の形態を、図面を参照して説明する。   Reference embodiments and the best mode of the present invention will be described below with reference to the drawings.

図１は参考の形態に係る車輪用転がり軸受装置の縦断面図である。同図において、右側は車輪用転がり軸受装置の車両アウタ側(車輪側)、左側は車両インナ側（反車輪側）を示す。同図を参照して、１は車輪用転がり軸受装置を示し、この車輪用転がり軸受装置１は、自動車の従動車輪を支持するタイプの複列外向きアンギュラ玉軸受として、外輪部材２と、ハブ軸３と、内輪４と、複数の転動体５，６と、二つの保持器７，８と、シール９とを備える。ハブ軸３と内輪４とにより、外輪部材２の内周側に配置する内輪部材を構成する。外輪部材２は、内周に設けられた複列の軌道部１０，１１と、外周の軸方向中間に径方向外向きに延設された車体固定用フランジ部１５と、このフランジ部１５よりも車両インナ側に設けられたインロー部１７とを備えている。フランジ部１５の円周方向複数箇所に軸方向に貫通するボルト孔１５ａが形成されている。インロー部１７は車体側に組付けられたナックル（図示していない）の内周面に嵌合され、フランジ部１５は上記ナックルにボルトで固定される。これにより外輪部材２は車体であるナックルに非回転に固定される。   FIG. 1 is a longitudinal sectional view of a rolling bearing device for a wheel according to a reference embodiment. In the figure, the right side shows the vehicle outer side (wheel side) of the wheel rolling bearing device, and the left side shows the vehicle inner side (counter wheel side). Referring to FIG. 1, reference numeral 1 denotes a wheel rolling bearing device. The wheel rolling bearing device 1 is a double row outward angular ball bearing of a type that supports a driven wheel of an automobile, and an outer ring member 2 and a hub. A shaft 3, an inner ring 4, a plurality of rolling elements 5 and 6, two cages 7 and 8, and a seal 9 are provided. The hub shaft 3 and the inner ring 4 constitute an inner ring member disposed on the inner peripheral side of the outer ring member 2. The outer ring member 2 includes double-row track portions 10 and 11 provided on the inner periphery, a vehicle body fixing flange portion 15 extending radially outwardly in the middle of the outer periphery in the axial direction, and more than the flange portion 15. And an inlay portion 17 provided on the vehicle inner side. Bolt holes 15 a penetrating in the axial direction are formed at a plurality of locations in the circumferential direction of the flange portion 15. The inlay portion 17 is fitted to the inner peripheral surface of a knuckle (not shown) assembled on the vehicle body side, and the flange portion 15 is fixed to the knuckle with a bolt. Thereby, the outer ring member 2 is fixed to the knuckle which is the vehicle body in a non-rotating manner.

ハブ軸３は、径方向外向きに延設されて車輪やブレーキディスクロータを取付けるための車輪取付用フランジ部１６と、このフランジ部１６から車両アウタ側に延設されたインロー部１９と、フランジ部１６の車両インナ側に形成されて外輪部材２の車両アウタ側の軌道部１１に対向する軌道部１３と、この軌道部１３よりも車両インナ側の位置に設けられた小径円筒部２０とを備えてなる。ハブ軸３のフランジ部１６には、円周方向複数箇所に軸方向に貫通するボルト孔２１が設けられ、このボルト孔２１にボルト２２が圧入により嵌合固定されている。このボルト２２に車輪やブレーキディスクロータに設けた孔が通されるとともに、その孔から突出するボルト２２にナットが装着されて、車輪やブレーキディスクロータがフランジ部１６に固定される。内輪４はハブ軸３の小径円筒部２０に外嵌され、内輪４の外周に外輪部材２の車両インナ側軌道部１０に対向する軌道部１２が形成されている。小径円筒部２０の端部は内輪４の車両インナ側端部の径方向外向きへのローリングかしめされ、これにより軸受に所要の予圧が付与され、かつ内輪４がハブ軸３から抜け止めされた状態で一体的に結合されている。転動体５，６は、外輪部材２の両軌道部１０，１１とハブ軸３と内輪４それぞれの両軌道部１２，１３との間に、介装されるとともに、保持器７，８によりそれぞれ転動自在に保持されている。シール９は、外輪部材２の車両アウタ側端部とハブ軸３との間に配置され、これらの間の環状空間Ａを外部から密封して、かつ環状空間Ａに封入したグリース等の潤滑剤が外部へ漏れ出ることを防止している。   The hub shaft 3 includes a wheel mounting flange portion 16 that extends outward in the radial direction to mount a wheel and a brake disc rotor, an inlay portion 19 that extends from the flange portion 16 toward the vehicle outer side, and a flange. A track portion 13 formed on the vehicle inner side of the portion 16 and facing the track portion 11 on the vehicle outer side of the outer ring member 2, and a small diameter cylindrical portion 20 provided at a position closer to the vehicle inner side than the track portion 13. Prepare. The flange portion 16 of the hub shaft 3 is provided with bolt holes 21 penetrating in the axial direction at a plurality of locations in the circumferential direction, and bolts 22 are fitted and fixed to the bolt holes 21 by press-fitting. A hole provided in the wheel or the brake disc rotor is passed through the bolt 22, and a nut is attached to the bolt 22 protruding from the hole, so that the wheel or the brake disc rotor is fixed to the flange portion 16. The inner ring 4 is externally fitted to the small-diameter cylindrical portion 20 of the hub shaft 3, and a track portion 12 is formed on the outer periphery of the inner ring 4 so as to face the vehicle inner side track portion 10 of the outer ring member 2. The end of the small-diameter cylindrical portion 20 is caulked in the radially outward direction of the end of the inner ring 4 on the inner side of the vehicle, whereby a required preload is applied to the bearing and the inner ring 4 is prevented from coming off from the hub axle 3. They are connected together in a state. The rolling elements 5 and 6 are interposed between both raceway portions 10 and 11 of the outer ring member 2 and both raceway portions 12 and 13 of the hub shaft 3 and the inner ring 4, and are respectively held by the cages 7 and 8. It is held freely rolling. The seal 9 is disposed between the vehicle outer side end of the outer ring member 2 and the hub shaft 3, and a lubricant such as grease that seals the annular space A between them from the outside and encloses the annular space A in the annular space A. Is prevented from leaking outside.

以上の構成を備えた車輪用転がり軸受装置1においては、外輪部材２の車両インナ側端部であるインロー部１７の開口を覆うカバー部材２５を備えている。カバー部材２５は、外輪部材２のインロー部１７の内周面１７ａに内嵌する円筒部２６と、外輪部材２の車両インナ側端面２ａに軸方向から当接する環状部２７と、インロー部１７の開口を塞ぐ円板部３０とを備える。カバー部材２の円板部３０には、簡略に示す回転検出装置３１を装着するための両端開口の円筒部３２が形成されている。カバー部材２５の円筒部２６は、外輪部材２の端部の内周側との嵌合部を構成し、該円筒部２６の内周面には金属製の環状部材３３が設けられている。カバー部材２５の円筒部２６は、環状部材３３に射出成形することで一体的に形成され、直径は、インロー部１７の内径に比べてわずかに大きく設定されている。   The wheel rolling bearing device 1 having the above-described configuration includes a cover member 25 that covers the opening of the spigot portion 17 that is the vehicle inner side end portion of the outer ring member 2. The cover member 25 includes a cylindrical portion 26 fitted into the inner peripheral surface 17a of the inlay portion 17 of the outer ring member 2, an annular portion 27 that abuts the vehicle inner side end surface 2a of the outer ring member 2 from the axial direction, And a disk portion 30 that closes the opening. The disc part 30 of the cover member 2 is formed with a cylindrical part 32 having openings at both ends for mounting a simplified rotation detection device 31. The cylindrical portion 26 of the cover member 25 constitutes a fitting portion with the inner peripheral side of the end portion of the outer ring member 2, and a metal annular member 33 is provided on the inner peripheral surface of the cylindrical portion 26. The cylindrical part 26 of the cover member 25 is integrally formed by injection molding on the annular member 33, and the diameter is set slightly larger than the inner diameter of the spigot part 17.

環状部材３３はその一部が径方向外側に半円弧状に突出しており、その半円弧状の突出部（係合部）３３ａの外径Ｄ１は、カバー部材２５の円筒部２６の内径Ｄ２に比べて大径に形成されており、この構成によって環状部材３３Ｂの車輪インナ側端面３３ａ，車輪アウタ側端面３３ｂが、それぞれ円筒部２６に軸方向で係止されている。環状部材３３の材料として、例えばＪＩＳ規格ＳＰＣＣなどの冷間圧延鋼板が好適に用いられる。カバー部材２５の素材として、外輪部材２の素材に近い線膨張係数を有する樹脂が好ましく、例えばポリアミド（ＰＡ）、ポリフェニレンサルファイド（ＰＰＳ）、ポリブチレンテレフタレート（ＰＢＴ）などの樹脂が挙げられる。   A part of the annular member 33 protrudes radially outward in a semicircular arc shape, and the outer diameter D1 of the semicircular arc-shaped protruding portion (engagement portion) 33a is equal to the inner diameter D2 of the cylindrical portion 26 of the cover member 25. The wheel inner side end surface 33a and the wheel outer side end surface 33b of the annular member 33B are respectively locked to the cylindrical portion 26 in the axial direction. As a material of the annular member 33, for example, a cold rolled steel plate such as JIS standard SPCC is preferably used. As the material of the cover member 25, a resin having a linear expansion coefficient close to that of the outer ring member 2 is preferable, and examples thereof include resins such as polyamide (PA), polyphenylene sulfide (PPS), and polybutylene terephthalate (PBT).

以上の構成を備えた車輪用転がり軸受装置１では、車輪の回転に伴なって、車体側に非回転に支持されている外輪部材２に玉５，６を介してハブ軸３が軸心回りに回転する。この回転数を回転検出装置３１でもって検出し、その検出結果に基づいてアンチロックブレーキシステムやトラクションコントロールシステムを制御することとなる。カバー部材２５は、回転検出装置３１を支持する機能と、外輪部材２のインロー部１７の開放部を覆う機能とを有する部材として兼用される。このようなカバー部材２５をインロー部１７に組付けるにあたり、カバー部材２５をインロー部１７に軸方向から装着する。この場合、カバー部材２５の円筒部２６の外径はインロー部１７の内径に比べてわずかに大きく設定されているが、カバー部材２５は、その円筒部２６の弾性により、インロー部１７の内周面１７ａに装着可能となる。カバー部材２５をさらに軸方向に押込んで、その環状部２７の車両アウタ側端面２７ｂを外輪部材２の車両インナ側端面２ａに軸方向から当接させる。また、カバー部材２５の円筒部２６の外径はインロー部１７の内径に比べてわずかに大きく設定されているから、該円筒部２６はその弾性によってわずかに撓みながら挿入されるが、円筒部２６の内周面には環状部材３３が固着されているから、この環状部材３３の剛性により円筒部２６の弾性撓み分の一部が支持される。   In the wheel rolling bearing device 1 having the above-described configuration, the hub axle 3 rotates around the center axis of the outer ring member 2 supported non-rotatingly on the vehicle body via balls 5 and 6 as the wheel rotates. Rotate to. This rotational speed is detected by the rotation detection device 31, and the antilock brake system and the traction control system are controlled based on the detection result. The cover member 25 is also used as a member having a function of supporting the rotation detection device 31 and a function of covering the open part of the spigot part 17 of the outer ring member 2. In assembling such a cover member 25 to the spigot portion 17, the cover member 25 is attached to the spigot portion 17 from the axial direction. In this case, the outer diameter of the cylindrical portion 26 of the cover member 25 is set to be slightly larger than the inner diameter of the spigot portion 17, but the cover member 25 has the inner periphery of the spigot portion 17 due to the elasticity of the cylindrical portion 26. It can be attached to the surface 17a. The cover member 25 is further pushed in the axial direction, and the vehicle outer side end surface 27b of the annular portion 27 is brought into contact with the vehicle inner side end surface 2a of the outer ring member 2 from the axial direction. Further, since the outer diameter of the cylindrical portion 26 of the cover member 25 is set slightly larger than the inner diameter of the spigot portion 17, the cylindrical portion 26 is inserted while being slightly bent due to its elasticity. Since the annular member 33 is fixed to the inner peripheral surface of this, a part of the elastic deformation of the cylindrical portion 26 is supported by the rigidity of the annular member 33.

車輪用転がり軸受装置１は、カバー部材２５をインロー部１７に組込んだ後に、インロー部１７を車体側のナックルに組付けられるものであり、この状態で上記のようにして使用されると、外輪部材２の温度が上昇し、その熱がカバー部材２５の円筒部２６に伝わる。また、車両が停止した場合は外輪部材２が冷える。このように、車輪用転がり軸受装置１ではその温度変化がカバー部材２５に伝わる。ここで、樹脂の線膨張係数は比較的大きいから、上記のような素材を用いてもカバー部材２５の円筒部２６を樹脂のみから形成すれば、温度変化に適合することが難しく、カバー部材２５はインロー部１７に対する所定の抜け力を失いやすい。そこで、カバー部材２５の円筒部２６の内径側に膨張係数の小さな環状部材３３を設け、温度変化に対しても所定の抜け力を確保する構成としている。   The wheel rolling bearing device 1 is a device in which the inlay portion 17 is assembled to the knuckle on the vehicle body side after the cover member 25 is assembled to the inlay portion 17, and when used in this state as described above, The temperature of the outer ring member 2 rises and the heat is transmitted to the cylindrical portion 26 of the cover member 25. Further, when the vehicle stops, the outer ring member 2 cools. Thus, in the wheel rolling bearing device 1, the temperature change is transmitted to the cover member 25. Here, since the linear expansion coefficient of the resin is relatively large, even if the material as described above is used, if the cylindrical portion 26 of the cover member 25 is formed only from the resin, it is difficult to adapt to the temperature change. Tends to lose a predetermined pulling force against the spigot part 17. Therefore, an annular member 33 having a small expansion coefficient is provided on the inner diameter side of the cylindrical portion 26 of the cover member 25 so as to ensure a predetermined pulling force against temperature changes.

さらに、環状部材３３はその一部が円弧状の突出部３３ａに形成され、該突出部３３ａの外径Ｄ１はカバー部材２５の円筒部２６の内径Ｄ２に比べて大径に形成されて、カバー部材２５の円筒部２６に軸方向で係止されている構成としている。これによって、上記のような温度変化が繰返されたとしても、環状部材３３Ｂがカバー部材２５から軸方向に外れるといった状態を効果的に回避することができ、長期に亙って所定の抜け力を確保することが可能となる。   Further, a part of the annular member 33 is formed in an arc-shaped protruding portion 33a, and the outer diameter D1 of the protruding portion 33a is formed larger than the inner diameter D2 of the cylindrical portion 26 of the cover member 25. The cylindrical portion 26 of the member 25 is locked in the axial direction. Thereby, even if the temperature change as described above is repeated, it is possible to effectively avoid the state in which the annular member 33B is detached from the cover member 25 in the axial direction. It can be secured.

(他の参考形態）
環状部材３３の形状やカバー部材２５の円筒部２６との一体化のための手段として、上記以外にも種々考えられる。具体的に図２および図３に示す場合を説明する。これらの図では、車輪用転がり軸受装置１の環状部材３３の形状として、単純な環状本体４０の周方向途中に、複数の貫通孔（係合部）４１を形成している。このような構成の環状部材３３をカバー部材２５の円筒部２６に埋設することで貫通孔４１にも樹脂を充填させて一体化し、環状部材３３を軸方向に移動不可能に固定している。特に環状部材３３の車輪インナ側端面３３ａ，車輪アウタ側端面３３ｂがカバー部材２５の円筒部２６に軸方向で係止されることで、確実に軸方向への脱落を防止することができる。他の構成は上記図１の形態に示した場合と同様であるので、同一の符号を付してその説明を省略する。 (Other reference forms)
Various means other than the above are conceivable as means for integrating the shape of the annular member 33 and the cylindrical portion 26 of the cover member 25. The case shown in FIGS. 2 and 3 will be specifically described. In these drawings, as a shape of the annular member 33 of the rolling bearing device 1 for wheels, a plurality of through holes (engagement portions) 41 are formed in the middle of the simple annular main body 40 in the circumferential direction. By embedding the annular member 33 having such a configuration in the cylindrical portion 26 of the cover member 25, the through-hole 41 is filled with resin and integrated, and the annular member 33 is fixed so as not to move in the axial direction. In particular, since the wheel inner side end surface 33a and the wheel outer side end surface 33b of the annular member 33 are locked in the axial direction to the cylindrical portion 26 of the cover member 25, it is possible to reliably prevent the axial member from falling off. Since the other configuration is the same as that shown in the embodiment of FIG. 1, the same reference numerals are given and the description thereof is omitted.

（本発明の最良の形態）
図４に環状部材３３の最良の実施形態を示す。この環状部材３３は、車両インナ側端部を径方向外方に向けて折曲げてなる突出部４６を備え、この突出部４６をカバー部材２５の円筒部２６に埋設した形状となっている。環状部材３３の突出部４６の車両インナ側端面４６ａおよび車両アウタ側端面４６ｂがカバー部材２５の円筒部２６に軸方向で係止し、確実に軸方向への脱落を防止することができる。他の構成は上記図１の形態に示した場合と同様であるので、同一の符号を付してその説明を省略する。 (Best Mode of the Invention)
FIG. 4 shows the best embodiment of the annular member 33. The annular member 33 includes a protruding portion 46 formed by bending a vehicle inner side end portion radially outward, and the protruding portion 46 is embedded in the cylindrical portion 26 of the cover member 25. The vehicle inner side end surface 46a and the vehicle outer side end surface 46b of the projecting portion 46 of the annular member 33 are axially locked to the cylindrical portion 26 of the cover member 25, and can be reliably prevented from falling off in the axial direction. Since the other configuration is the same as that shown in the embodiment of FIG. 1, the same reference numerals are given and description thereof is omitted.

１…車輪用転がり軸受装置
２…外輪部材
２５…カバー部材
２６…円筒部（外輪部材２との嵌合部）
３３…環状部材
３３ａ…突出部（カバー部材２５との係合部） DESCRIPTION OF SYMBOLS 1 ... Rolling bearing apparatus 2 for wheels ... Outer ring member 25 ... Cover member 26 ... Cylindrical part (Fitting part with the outer ring member 2)
33 ... annular member 33a ... projecting part (engagement part with cover member 25)

Claims (1)

外輪部材の端部に嵌合固定されて当該車輪用転がり軸受装置の軸方向開口部を覆う樹脂製のカバー部材を備えた車輪用転がり軸受装置であって、
上記カバー部材は、外輪部材の端部の内周面に嵌合する円筒部と、車両アウタ側端面が上記外輪部材の車両インナ側端面に軸方向において当接する環状部とを備え、
上記円筒部の内周側に金属製の環状部材が設けられ、
上記環状部材は、当該環状部材の端部を径方向外方に向けて折り曲げてなる突出部を備え、
上記突出部は上記円筒部に埋設され、当該突出部の車両インナ側端面および車両アウタ側端面が上記円筒部に軸方向で係止されている、ことを特徴とする車輪用転がり軸受装置。 A wheel rolling bearing device including a resin cover member that is fitted and fixed to an end of an outer ring member and covers an axial opening of the wheel rolling bearing device.
The cover member includes a cylindrical portion that is fitted to the inner peripheral surface of the end portion of the outer ring member, and an annular portion in which the vehicle outer side end surface is in contact with the vehicle inner side end surface of the outer ring member in the axial direction.
A metal annular member is provided on the inner peripheral side of the cylindrical portion,
The annular member includes a protrusion formed by bending an end of the annular member outward in the radial direction,
The rolling bearing device for a wheel according to claim 1, wherein the protruding portion is embedded in the cylindrical portion, and a vehicle inner side end surface and a vehicle outer side end surface of the protruding portion are axially locked to the cylindrical portion.
JP2011004114A 2011-01-12 2011-01-12 Rolling bearing unit for wheel Pending JP2011121584A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5367603U (en) * 1976-11-11 1978-06-07
JP2004052832A (en) * 2002-07-17 2004-02-19 Koyo Seiko Co Ltd Rolling bearing device
WO2004081401A1 (en) * 2003-03-13 2004-09-23 Koyo Seiko Co. Ltd. Rolling bearing unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5367603U (en) * 1976-11-11 1978-06-07
JP2004052832A (en) * 2002-07-17 2004-02-19 Koyo Seiko Co Ltd Rolling bearing device
WO2004081401A1 (en) * 2003-03-13 2004-09-23 Koyo Seiko Co. Ltd. Rolling bearing unit

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