JP2013177044A - Rolling bearing device for wheel - Google Patents

Rolling bearing device for wheel Download PDF

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Publication number
JP2013177044A
JP2013177044A JP2012041460A JP2012041460A JP2013177044A JP 2013177044 A JP2013177044 A JP 2013177044A JP 2012041460 A JP2012041460 A JP 2012041460A JP 2012041460 A JP2012041460 A JP 2012041460A JP 2013177044 A JP2013177044 A JP 2013177044A
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Prior art keywords
vehicle
outer ring
wheel
rolling bearing
bearing device
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Japanese (ja)
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Hiroshi Inukai
浩 犬飼
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JTEKT Corp
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JTEKT Corp
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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
    • 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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  • Gasket Seals (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a rolling bearing device for a wheel capable of improving sealing performance by preventing a foreign matter from infiltrating into a sliding part of a sealing device from between both connection surfaces where a vehicle fixing member and a flange part formed on an outer ring are connected.SOLUTION: A hub unit 1 includes: an outer ring 2 connected to a vehicle fixing member 10 at the vehicle inner side; an inner shaft 3 and an inner ring 4 connected to a wheel at the vehicle outer side; and a sealing device 7, which is fitted on the inner circumferential surface of the vehicle inner side end in the axial direction of the outer ring 2, has a sliding contact part 7d that slide-contacts on a slinger 7c, and seals the inner shaft 3 and the inner ring 4 and the outer ring 2 at the vehicle inner side. In this unit, the outer ring 2 has a knuckle fitting part 10b to which a knuckle 10 is fitted on the outer circumferential surface of the vehicle inner side end, and a flange part 2c which is formed protrusively outward in the radial direction from the vehicle outer side end of the knuckle fitting part 10b and fixed on the knuckles 10 at multiple portions in the circumferential direction. A rubber spacer 8 is interposed between both connection surfaces where the knuckle 10 and the flange part 2c are connected.

Description

本発明は、車輪用転がり軸受装置に関する。   The present invention relates to a wheel rolling bearing device.

車両の車輪に用いる車輪用転がり軸受装置は、外輪が車両インナ側の車両固定部材（例えば、ナックル）に接続され、内輪が車両アウタ側の車輪に接続されている。この車輪用転がり軸受装置は、雨水や泥水等（以下、総称して「異物」と記載する。）の影響を受けるような悪環境で使用されるため、外輪と内輪との間の環状空間を軸方向の両端で密封装置により密封している。車両インナ側に配置される密封装置は、外輪の軸方向の端部内周面に嵌合されて、内輪の外周に摺接して密封している。   In a rolling bearing device for a wheel used for a vehicle wheel, an outer ring is connected to a vehicle fixing member (for example, a knuckle) on the vehicle inner side, and an inner ring is connected to a wheel on the vehicle outer side. Since this wheel rolling bearing device is used in a bad environment affected by rainwater, muddy water, etc. (hereinafter collectively referred to as “foreign matter”), an annular space between the outer ring and the inner ring is formed. It is sealed with a sealing device at both axial ends. The sealing device disposed on the vehicle inner side is fitted to the inner peripheral surface of the end portion in the axial direction of the outer ring, and is slidably in contact with the outer periphery of the inner ring for sealing.

外輪は、車両インナ側の端部外周面に車両固定部材が嵌合される嵌合部と、この嵌合部の車両アウタ側の端部から径方向外向へ突出形成されるフランジ部とを備える。外輪と車両固定部材とは、外輪に車両固定部材が嵌合され、フランジ部の周方向の複数箇所に設けたボルト孔にボルトを挿通し、車両固定部材にボルトにて固定される。（例えば、特許文献１を参照）   The outer ring includes a fitting portion in which the vehicle fixing member is fitted to the outer peripheral surface of the end portion on the vehicle inner side, and a flange portion that is formed to project radially outward from the end portion on the vehicle outer side of the fitting portion. . The outer ring and the vehicle fixing member are fixed to the vehicle fixing member with bolts inserted into bolt holes provided at a plurality of locations in the circumferential direction of the flange portion. (For example, see Patent Document 1)

特開２００１−１０７９７６号公報JP 2001-107976 A

しかしながら、上記の車輪用転がり軸受装置は、車両固定部材とフランジ部とが接続される両接続面が旋削加工された金属同士であることから、それぞれの面粗さによっては微少な隙間が生じることがある。そのため、車輪用転がり軸受装置は、異物が車両固定部材を伝わってこの隙間から侵入し、嵌合部、及び外輪の車両インナ側の端部を介して密封装置が内輪に摺接する摺接部に侵入する場合がある。その場合、摺接部の寿命が低下し密封性が低下することになる。特に、路面が悪環境であるときの泥水や寒冷地においての塩水などが侵入したときには、摺接部の寿命低下が著しい。そこで、車輪用転がり軸受装置は、異物が車両固定部材と外輪に形成したフランジ部とが接続される両接続面間から密封装置の摺接部に侵入するのを防止し、密封性を向上させることが課題となっていた。   However, in the above-described rolling bearing device for a wheel, since both connection surfaces to which the vehicle fixing member and the flange portion are connected are turned metal, a minute gap is generated depending on the surface roughness. There is. For this reason, in the rolling bearing device for a wheel, foreign matter enters the vehicle fixing member and enters through this gap, and the sealing device slides on the inner ring through the fitting part and the end of the outer ring on the vehicle inner side. Intrusion may occur. In that case, the life of the sliding contact portion is reduced and the sealing performance is lowered. In particular, when muddy water when the road surface is in a bad environment or salt water in a cold region or the like enters, the life of the sliding contact portion is significantly reduced. Therefore, the rolling bearing device for wheels prevents foreign matter from entering the sliding contact portion of the sealing device from between both connection surfaces where the vehicle fixing member and the flange portion formed on the outer ring are connected, and improves the sealing performance. It was an issue.

本発明は、このような課題を解決するためになされたものであって、異物が車両固定部材と外輪に形成したフランジ部とが接続される両接続面間から密封装置の摺接部に侵入するのを防止し、密封性を向上させることができる車輪用転がり軸受装置を提供することを目的とする。   The present invention has been made to solve such a problem, and a foreign object enters a sliding contact portion of a sealing device from between both connection surfaces where a vehicle fixing member and a flange portion formed on an outer ring are connected. An object of the present invention is to provide a rolling bearing device for a wheel that can prevent this from occurring and improve the sealing performance.

上記の課題を解決するため、請求項１に係る車輪用転がり軸受装置の構成上の特徴は、車両インナ側の車両固定部材に接続される外輪と、車両アウタ側の車輪に接続され前記外輪と相対回転する内輪と、前記外輪の軸方向の車両インナ側の端部内周面に嵌合され、前記内輪の外周に摺接する摺接部を有し、前記内輪と前記外輪との間を車両インナ側で密封する密封装置と、を備える車輪用転がり軸受装置において、前記外輪は、軸方向の車両インナ側の端部外周面に前記車両固定部材が嵌合される嵌合部と、この嵌合部の車両アウタ側の端部から径方向外向へ突出形成され前記車両固定部材に周方向の複数箇所で固定されるフランジ部を有し、前記車両固定部材と前記フランジ部とが接続される両接続面間に弾性体が介在することである。   In order to solve the above-mentioned problem, the structural features of the rolling bearing device for a wheel according to claim 1 include an outer ring connected to a vehicle fixing member on the vehicle inner side, and an outer ring connected to a wheel on the vehicle outer side. A relatively rotating inner ring and an inner peripheral surface of the outer ring in the axial direction of the outer side of the outer ring are fitted with a sliding contact portion that is in sliding contact with the outer periphery of the inner ring, and the vehicle inner is provided between the inner ring and the outer ring. A rolling device for a wheel comprising a sealing device for sealing on a side, wherein the outer ring has a fitting portion in which the vehicle fixing member is fitted to an outer peripheral surface of an end portion on the vehicle inner side in the axial direction, and the fitting A flange portion that protrudes radially outward from the end portion of the vehicle outer side of the portion and is fixed to the vehicle fixing member at a plurality of circumferential positions, and the vehicle fixing member and the flange portion are connected to each other. The elastic body is interposed between the connection surfaces.

請求項１の車輪用転がり軸受装置によれば、接続面間に介在する弾性体が弾性変形することにより車両固定部材とフランジ部とが接続される両接続面間が密着するので、異物が両接続面間から密封装置の摺接部に侵入するのを防止できる。   According to the rolling bearing device for a wheel of claim 1, since the elastic body interposed between the connection surfaces is elastically deformed, the two connection surfaces where the vehicle fixing member and the flange portion are connected closely contact each other. Intrusion into the sliding contact portion of the sealing device from between the connection surfaces can be prevented.

請求項２に係る車輪用転がり軸受装置の構成上の特徴は、前記弾性体は、前記フランジ部の外周より全周に亘って径方向に大きいことである。   The structural feature of the rolling bearing device for a wheel according to claim 2 is that the elastic body is larger in the radial direction over the entire circumference than the outer circumference of the flange portion.

請求項２の車輪用転がり軸受装置によれば、接続面間に異物が溜まらないので、異物が車両固定部材とフランジ部とが接続される両接続面間から密封装置の摺接部に侵入するのを確実に防止できる。   According to the rolling bearing device for a wheel of claim 2, since foreign matter does not collect between the connection surfaces, the foreign matter enters the sliding contact portion of the sealing device from between both connection surfaces where the vehicle fixing member and the flange portion are connected. Can be surely prevented.

請求項３に係る車輪用転がり軸受装置の構成上の特徴は、前記弾性体は、前記フランジ部側の面に粘着層を有し、前記フランジ部に粘着されていることである。   A structural feature of the rolling bearing device for a wheel according to claim 3 is that the elastic body has an adhesive layer on the surface on the flange portion side and is adhered to the flange portion.

請求項３の車輪用転がり軸受装置によれば、外輪のフランジ部に弾性体が粘着されるので、車輪用転がり軸受装置を車両固定部材に接続する際に、弾性体がフランジ部の接続面形状からずれることなく合致している。これにより、車輪用転がり軸受装置は、異物が車両固定部材とフランジ部とが接続される両接続面間から密封装置の摺接部に侵入するのを確実に防止できる。   According to the rolling bearing device for a wheel of claim 3, the elastic body is adhered to the flange portion of the outer ring. Therefore, when the rolling bearing device for the wheel is connected to the vehicle fixing member, the elastic body has a connection surface shape of the flange portion. It matches without deviating from. Thereby, the rolling bearing device for wheels can reliably prevent foreign matter from entering the sliding contact portion of the sealing device from between both connection surfaces where the vehicle fixing member and the flange portion are connected.

本発明によれば、異物が車両固定部材と外輪に形成したフランジ部とが接続される両接続面間から密封装置の摺接部に侵入するのを防止し、密封性を向上させることができる車輪用転がり軸受装置を提供できる。   ADVANTAGE OF THE INVENTION According to this invention, it can prevent that a foreign material penetrate | invades into the sliding contact part of a sealing device from between the both connection surfaces where the vehicle fixing member and the flange part formed in the outer ring | wheel are connected, and can improve sealing performance. A rolling bearing device for a wheel can be provided.

第１実施形態：本発明の車輪用転がり軸受装置を適用したハブユニットの縦断面図である。1st Embodiment: It is a longitudinal cross-sectional view of the hub unit to which the rolling bearing device for wheels of this invention is applied. 第１実施形態：図１の要部拡大断面図である。1st Embodiment: It is a principal part expanded sectional view of FIG. 第１実施形態：図１のハブユニットを車両インナ側から見た図である。1st Embodiment: It is the figure which looked at the hub unit of FIG. 1 from the vehicle inner side. 第２実施形態：本発明の車輪用転がり軸受装置を適用したハブユニットの縦断面の要部拡大図である。2nd Embodiment: It is the principal part enlarged view of the longitudinal cross-section of the hub unit to which the rolling bearing device for wheels of this invention is applied.

以下、本発明の車輪用転がり軸受装置を具体化した実施形態について図面を参照しつつ説明する。
＜第１実施形態＞
先ず、本発明の第１実施形態に係る車輪用転がり軸受装置を図１に従って説明する。
図１は、第１実施形態の車輪用転がり軸受装置を適用したハブユニット１の縦断面図である。図１を参照しつつ説明する。なお、以下の説明において、車両インナ側とは図１における左側を示し、車両アウタ側とは図１における右側を示すものとする。 DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a rolling bearing device for wheels according to the present invention will be described with reference to the drawings.
<First Embodiment>
First, a wheel rolling bearing device according to a first embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a longitudinal sectional view of a hub unit 1 to which the wheel rolling bearing device of the first embodiment is applied. This will be described with reference to FIG. In the following description, the vehicle inner side indicates the left side in FIG. 1, and the vehicle outer side indicates the right side in FIG.

ハブユニット１（車輪用転がり軸受装置）は、例えば車両の駆動輪側の物であり、複列外向きのアンギュラ玉軸受構造とされている。具体的には、ハブユニット１は、車両側のナックル１０（車両固定部材）に固定される外輪２と、この外輪２の中心軸線０１と同軸に配置されて車輪（図示せず）に固定される内軸３（内輪）と、内軸３の車両インナ側端に一体形成された嵌め合い部３ａの外周面に嵌着される内輪４と、外輪２と内軸３及び内輪４との間にて周方向に配置される複列の玉５（転動体）とを備えている。   The hub unit 1 (wheel rolling bearing device) is, for example, an object on the drive wheel side of a vehicle, and has a double-row outward angular ball bearing structure. Specifically, the hub unit 1 is arranged coaxially with the outer ring 2 fixed to the knuckle 10 (vehicle fixing member) on the vehicle side and the central axis 01 of the outer ring 2 and fixed to a wheel (not shown). Between the inner ring 3 (inner ring), the inner ring 4 fitted to the outer peripheral surface of the fitting portion 3a formed integrally with the vehicle inner side end of the inner shaft 3, the outer ring 2, the inner shaft 3 and the inner ring 4 And a double row of balls 5 (rolling elements) arranged in the circumferential direction.

外輪２の内周面には、車両インナ側に配列された玉５用の外輪軌道面２ａと、車両アウタ側に配列された玉５用の外輪軌道面２ｂとが形成されている。   On the inner peripheral surface of the outer ring 2, an outer ring raceway surface 2a for the balls 5 arranged on the vehicle inner side and an outer ring raceway surface 2b for the balls 5 arranged on the vehicle outer side are formed.

内軸３の外周面には、外輪２の外輪軌道面２ｂに対向する内軸軌道面３ｂが形成され、内軸軌道面３ｂよりもさらに車両アウタ側には、径方向に突出形成された車輪取付フランジ部３ｃが形成されている。内軸３の内周面には、貫通孔３ｄが形成され、貫通孔３ｄにドライブシャフト１１が挿嵌される。   An inner shaft raceway surface 3b that faces the outer ring raceway surface 2b of the outer ring 2 is formed on the outer peripheral surface of the inner shaft 3, and a wheel that protrudes radially in the vehicle outer side from the inner shaft raceway surface 3b. A mounting flange portion 3c is formed. A through hole 3d is formed on the inner peripheral surface of the inner shaft 3, and the drive shaft 11 is inserted into the through hole 3d.

内輪４は、嵌め合い部３ａに外嵌圧入され、嵌め合い部３ａと一体化されている。内輪４の外周面には、外輪２の外輪軌道面２ａに対向する内輪軌道面４ａが形成されている。   The inner ring 4 is press-fitted into the fitting portion 3a and integrated with the fitting portion 3a. An inner ring raceway surface 4 a is formed on the outer circumferential surface of the inner ring 4 so as to face the outer ring raceway surface 2 a of the outer ring 2.

外輪２と内軸３及び内輪４との間には、転動体としての玉５を配置するための環状の軸受内部空間Ｓが形成される。この軸受内部空間Ｓは、車両アウタ側では密封装置６により、車両インナ側では密封装置７により、外輪２と内軸３及び内輪４とのそれぞれの相対回転を許容した状態で密封されている。   Between the outer ring 2, the inner shaft 3 and the inner ring 4, an annular bearing inner space S for arranging balls 5 as rolling elements is formed. The bearing internal space S is sealed by the sealing device 6 on the vehicle outer side and the sealing device 7 on the vehicle inner side in a state in which relative rotation between the outer ring 2 and the inner shaft 3 and the inner ring 4 is allowed.

図２は、第１実施形態の図１の要部拡大断面図である。図３は、第１実施形態の図１のハブユニット１を車両インナ側から見た図である。図１及び図２を参照しつつ説明する。なお、以下の説明において、車両インナ側とは図２における左側を示し、車両アウタ側とは図２における右側を示すものとする。   FIG. 2 is an enlarged cross-sectional view of a main part of FIG. 1 according to the first embodiment. FIG. 3 is a view of the hub unit 1 of FIG. 1 of the first embodiment viewed from the vehicle inner side. This will be described with reference to FIGS. In the following description, the vehicle inner side indicates the left side in FIG. 2, and the vehicle outer side indicates the right side in FIG.

密封装置７は、内輪４に圧入嵌合されるスリンガ７ｃと、外輪２に圧入嵌合される芯金７ａとを備える。   The sealing device 7 includes a slinger 7c that is press-fitted to the inner ring 4 and a cored bar 7a that is press-fitted to the outer ring 2.

スリンガ７ｃは、内輪４の外周の車両インナ側端部に嵌合される円筒状の円筒部７ｃ１と、円筒部７ｃ１の車両インナ側の端部から径方向外方へ延在する円板部７ｃ２とからなり、断面が略Ｌ字形に形成されている。スリンガ７ｃの材料としては、例えば、ステンレス鋼のＳＵＳ４３０が用いられる。   The slinger 7c includes a cylindrical cylindrical portion 7c1 fitted to a vehicle inner side end portion of the outer periphery of the inner ring 4, and a disc portion 7c2 extending radially outward from the end portion of the cylindrical portion 7c1 on the vehicle inner side. The cross section is formed in a substantially L shape. As a material of the slinger 7c, for example, stainless steel SUS430 is used.

芯金７ａは、外輪２の内周の車両インナ側端部に嵌合され円筒部７ｃ１に対向配置される円筒状の芯金円筒部７ａ１と、芯金円筒部７ａ１の車両アウナ側の端部から径方向内方へ延在し円板部７ｃ２に対向配置される芯金円板部７ａ２とからなり、断面が略Ｌ字形に形成されている。芯金７ａの材料としては、例えば、防錆処理された冷延鋼板のＳＰＣＣが用いられる。   The cored bar 7a is a cylindrical cored bar cylindrical part 7a1 that is fitted to a vehicle inner side end part of the inner periphery of the outer ring 2 and is disposed to face the cylindrical part 7c1, and an end part of the cored bar cylindrical part 7a1 on the vehicle inner side. And a cored bar part 7a2 extending radially inward and disposed opposite to the disk part 7c2, and having a substantially L-shaped cross section. As a material of the cored bar 7a, for example, SPCC of a cold-rolled steel sheet that has been rust-proofed is used.

芯金円板部７ａ２には、弾性部材からなる環状のシールリップ７ｂが加硫接着されて一体化されている。シールリップ７ｂは、円板部７ｃ２の車両アウタ側に摺接するアキシャルリップ７ｂ１と、円筒部７ｃ１の外周面の２箇所に摺接するラジアルリップ７ｂ２とを備える。密封装置７は、これらのリップがスリンガ７ｃに摺接する摺接部７ｄを形成して、軸受内部空間Ｓを車両インナ側にて密封している。リップの材料としては、例えば、ニトリルゴムが用いられる。   An annular seal lip 7b made of an elastic member is vulcanized and integrated with the metal core disc portion 7a2. The seal lip 7b includes an axial lip 7b1 slidably in contact with the vehicle outer side of the disc portion 7c2, and a radial lip 7b2 slidably in contact with two locations on the outer peripheral surface of the cylindrical portion 7c1. The sealing device 7 forms a sliding contact portion 7d in which these lips are in sliding contact with the slinger 7c, and seals the bearing inner space S on the vehicle inner side. As the lip material, for example, nitrile rubber is used.

外輪２は、車両インナ側の端部外周面にナックル１０が嵌合される嵌合部２ｅと、嵌合部２ｅの車両アウタ側の端部から径方向外向へ突出する車両取付フランジ部２ｃと、車両取付フランジ部２ｃの車両インナ側端面にナックル１０が接続されるフランジ接続面２ｄ（接続面）とを有する。   The outer ring 2 includes a fitting portion 2e in which the knuckle 10 is fitted to the outer peripheral surface of the end portion on the vehicle inner side, and a vehicle mounting flange portion 2c that protrudes radially outward from the end portion on the vehicle outer side of the fitting portion 2e. And a flange connection surface 2d (connection surface) to which the knuckle 10 is connected to the vehicle inner side end surface of the vehicle mounting flange portion 2c.

外輪２のナックル１０への固定は、ナックル１０の径方向の内周に形成されるナックル嵌合部１０ｂが、嵌合部２ｅに嵌合する。そして、ナックル１０の接続面であるナックル接続面１０ａ（接続面）とフランジ接続面２ｄとの間に、弾性部材からなる環状のゴムスペーサ８（弾性体）を介在して、周方向の複数箇所（本実施形態では、４箇所）でボルトにより固定される。ゴムスペーサ８の材料としては、例えば、ニトリルゴムで、厚さが０．５ｍｍのものが用いられる。ゴムスペーサ８の外形は、周方向にフランジ接続面２ｄの外周に沿って形成され、全周に亘って径方向外方へ寸法Ｂ（例えば、０．５ｍｍ）突出している。   For fixing the outer ring 2 to the knuckle 10, a knuckle fitting portion 10b formed on the inner periphery in the radial direction of the knuckle 10 is fitted to the fitting portion 2e. Then, an annular rubber spacer 8 (elastic body) made of an elastic member is interposed between the knuckle connection surface 10a (connection surface) that is the connection surface of the knuckle 10 and the flange connection surface 2d, so that a plurality of circumferential locations are provided. It is fixed with bolts (in this embodiment, four locations). As a material of the rubber spacer 8, for example, a nitrile rubber having a thickness of 0.5 mm is used. The outer shape of the rubber spacer 8 is formed along the outer periphery of the flange connection surface 2d in the circumferential direction, and projects a dimension B (for example, 0.5 mm) outward in the radial direction over the entire circumference.

これらの構成により、ハブユニット１は、ゴムスペーサ８が弾性変形することによりナックル接続面１０ａとフランジ接続面２ｄとが密着する。そのため、ハブユニット１は、異物が矢印Ａのようにナックル１０を伝わって、これら両接続面間から密封装置７の摺接部７ｄに侵入するのを確実に防止できる。   With these configurations, in the hub unit 1, the knuckle connection surface 10a and the flange connection surface 2d are brought into close contact with each other when the rubber spacer 8 is elastically deformed. Therefore, the hub unit 1 can reliably prevent foreign matters from being transmitted through the knuckle 10 as indicated by the arrow A and entering the sliding contact portion 7d of the sealing device 7 from between these connection surfaces.

以上のように、第１実施形態に係るハブユニット１によれば、異物が、ナックル１０とフランジ部２ｃとが接続されるナックル接続面１０ａとフランジ接続面２ｄとの間から、密封装置７の摺接部７ｄに侵入するのを確実に防止し、密封性を向上させることができる。   As described above, according to the hub unit 1 according to the first embodiment, foreign matter is generated between the knuckle connection surface 10a and the flange connection surface 2d where the knuckle 10 and the flange portion 2c are connected. It is possible to reliably prevent the sliding contact portion 7d from entering and improve the sealing performance.

＜第２実施形態＞
次に、本発明の第２実施形態に係る車輪用転がり軸受装置を図４に従って説明する。
図４は、第２実施形態の車輪用転がり軸受装置を適用したハブユニット１００の縦断面の要部拡大図である。なお、以下の説明において、車両インナ側とは図４における左側を示し、車両アウタ側とは図４における右側を示すものとする。図１に示す第１実施形態のハブユニット１との違いは、ゴムスペーサ８に粘着剤８ａ１が塗付されて、フランジ接続面２ｄに粘着されていることである。 Second Embodiment
Next, a wheel rolling bearing device according to a second embodiment of the present invention will be described with reference to FIG.
FIG. 4 is an enlarged view of a main part of a longitudinal section of the hub unit 100 to which the wheel rolling bearing device of the second embodiment is applied. In the following description, the vehicle inner side indicates the left side in FIG. 4, and the vehicle outer side indicates the right side in FIG. The difference from the hub unit 1 of the first embodiment shown in FIG. 1 is that an adhesive 8a1 is applied to the rubber spacer 8 and is adhered to the flange connection surface 2d.

図４に示すように、ゴムスペーサ８には、フランジ接続面２ｄ側の面に粘着剤８ａ１（粘着層）が塗付されている。このゴムスペーサ８が、フランジ部２ｃのフランジ接続面２ｄに粘着される。
そして、この組み立てられたハブユニット１００は、車両組立工場などにおいてナックル１０に、フランジ接続面２ｄとナックル接続面１０ａとがゴムスペーサ８を介在して接続されて、固定される。
これにより、ハブユニット１００が、ナックル１０に固定される際に、ゴムスペーサ８がフランジ接続面２ｄの面形状からずれることなく合致している。 As shown in FIG. 4, the rubber spacer 8 is coated with an adhesive 8a1 (adhesive layer) on the surface on the flange connection surface 2d side. The rubber spacer 8 is adhered to the flange connection surface 2d of the flange portion 2c.
The assembled hub unit 100 is fixed to the knuckle 10 by connecting the flange connection surface 2d and the knuckle connection surface 10a with the rubber spacer 8 interposed therebetween in a vehicle assembly factory or the like.
Thereby, when the hub unit 100 is fixed to the knuckle 10, the rubber spacer 8 is matched without deviating from the surface shape of the flange connection surface 2d.

以上のように、第２実施形態に係るハブユニット１００によれば、異物が、ナックル１０とフランジ部２ｃとが接続されるナックル接続面１０ａとフランジ接続面２ｄとの間から、密封装置７の摺接部７ｄに侵入するのを確実に防止し、密封性を向上させることができる。   As described above, according to the hub unit 100 according to the second embodiment, the foreign matter is removed from between the knuckle connection surface 10a and the flange connection surface 2d where the knuckle 10 and the flange portion 2c are connected. It is possible to reliably prevent the sliding contact portion 7d from entering and improve the sealing performance.

また、ハブユニット１００は、車両組立工場において、ゴムスペーサ８をフランジ接続面２ｄの面形状に合わせる作業が必要ないので、ハブユニット１００をナックル１０に固定する組立作業が簡素化できる。   Further, the hub unit 100 does not require an operation for matching the rubber spacer 8 to the surface shape of the flange connection surface 2d in the vehicle assembly plant, so that the assembly operation for fixing the hub unit 100 to the knuckle 10 can be simplified.

なお、第１、第２実施形態では、駆動輪の構成について説明したが、本発明は従動輪においても、もちろん適用できるものである。   In the first and second embodiments, the configuration of the drive wheel has been described. However, the present invention is naturally applicable to a driven wheel.

また、第１、第２実施形態では、シールリップ７ｂは、スリンガ７ｃに摺接するとした。しかし、それに限るものではなく、例えば、内輪４の外周に摺接する構成に適用してもよい。   In the first and second embodiments, the seal lip 7b is in sliding contact with the slinger 7c. However, the present invention is not limited to this. For example, the present invention may be applied to a configuration that is in sliding contact with the outer periphery of the inner ring 4.

また、第１、第２実施形態では、ゴムスペーサ８の外形は、周方向にフランジ接続面２ｄの外周より径方向外方へ突出（大きい）しているとした。しかし、それに限るものではなく、例えば、フランジ接続面２ｄの外周と同一、又は、フランジ接続面２ｄの外周より小さい構成に適用してもよい。   In the first and second embodiments, the outer shape of the rubber spacer 8 is projected (larger) outward in the radial direction than the outer periphery of the flange connection surface 2d in the circumferential direction. However, the present invention is not limited to this. For example, the present invention may be applied to a configuration that is the same as the outer periphery of the flange connection surface 2d or smaller than the outer periphery of the flange connection surface 2d.

１，１００：ハブユニット（車輪用転がり軸受装置）、 ２：外輪、 ２a，２ｂ：外輪軌道面、 ２ｃ：フランジ部、 ２ｄ：フランジ接続面（接続面）、 ２ｅ：嵌合部、 ３：内軸（内輪）、 ３ａ：嵌め合い部、 ３ｂ：内軸軌道面、 ３ｃ：車輪取付フランジ部、 ３ｄ：貫通孔、 ４：内輪、 ４ａ：内輪軌道面、 ５：玉、 ６，７：密封装置、 ７ａ:芯金、 ７a１:
芯金円筒部、 ７a２: 芯金円板部、 ７ｂ：シールリップ、 ７ｂ１:アキシャルリップ、 ７ｂ２:ラジアルリップ、 ７ｃ:スリンガ、 ７ｃ１: 円筒部、 ７ｃ２:
円板部、 ７ｄ：摺接部、 ８：ゴムスペーサ（弾性体）、 ８ａ１：粘着剤（粘着層）、 １０：ナックル（車両固定部材）、 １０ａ：ナックル接続面（接続面）、 １０ｂ：ナックル嵌合部、 １１：ドライブシャフト DESCRIPTION OF SYMBOLS 1,100: Hub unit (rolling bearing apparatus for wheels), 2: Outer ring, 2a, 2b: Outer ring raceway surface, 2c: Flange part, 2d: Flange connection surface (connection surface), 2e: Fitting part, 3: Inner Shaft (inner ring), 3a: fitting part, 3b: inner shaft raceway surface, 3c: wheel mounting flange part, 3d: through hole, 4: inner ring, 4a: inner ring raceway surface, 5: ball, 6, 7: sealing device 7a: Core, 7a1:
Core metal cylindrical part, 7a2: Metal core disk part, 7b: Seal lip, 7b1: Axial lip, 7b2: Radial lip, 7c: Slinger, 7c1: Cylindrical part, 7c2:
Disc part, 7d: sliding contact part, 8: rubber spacer (elastic body), 8a1: adhesive (adhesive layer), 10: knuckle (vehicle fixing member), 10a: knuckle connection surface (connection surface), 10b: knuckle Mating part 11: Drive shaft

Claims (3)

車両インナ側の車両固定部材に接続される外輪と、車両アウタ側の車輪に接続され前記外輪と相対回転する内輪と、前記外輪の軸方向の車両インナ側の端部内周面に嵌合され、
前記内輪の外周に摺接する摺接部を有し、前記内輪と前記外輪との間を車両インナ側で密封する密封装置と、を備える車輪用転がり軸受装置において、
前記外輪は、軸方向の車両インナ側の端部外周面に前記車両固定部材が嵌合される嵌合部と、この嵌合部の車両アウタ側の端部から径方向外向へ突出形成され前記車両固定部材に周方向の複数箇所で固定されるフランジ部を有し、
前記車両固定部材と前記フランジ部とが接続される両接続面間に弾性体が介在することを特徴とする車輪用転がり軸受装置。 An outer ring connected to a vehicle fixing member on the vehicle inner side, an inner ring connected to a wheel on the vehicle outer side and rotating relative to the outer ring, and an end inner peripheral surface on the vehicle inner side in the axial direction of the outer ring,
A rolling bearing device for a wheel, comprising: a sliding contact portion that is in sliding contact with the outer periphery of the inner ring;
The outer ring is formed to protrude outward in the radial direction from a fitting portion in which the vehicle fixing member is fitted to an outer peripheral surface of an end portion on the vehicle inner side in the axial direction, and an end portion on the vehicle outer side of the fitting portion. Having a flange portion fixed to the vehicle fixing member at a plurality of locations in the circumferential direction;
A rolling bearing device for wheels, wherein an elastic body is interposed between both connection surfaces to which the vehicle fixing member and the flange portion are connected. 前記弾性体は、前記フランジ部の外周より全周に亘って径方向に大きいことを特徴とする請求項１に記載の車輪用転がり軸受装置。   The rolling bearing device for a wheel according to claim 1, wherein the elastic body is larger in the radial direction over the entire circumference than the outer circumference of the flange portion. 前記弾性体は、前記フランジ部側の面に粘着層を有し、前記フランジ部に粘着されていることを特徴とする請求項１又は請求項２に記載の車輪用転がり軸受装置。   The wheel rolling bearing device according to claim 1 or 2, wherein the elastic body has an adhesive layer on a surface on the flange portion side, and is adhered to the flange portion.
JP2012041460A 2012-02-28 2012-02-28 Rolling bearing device for wheel Pending JP2013177044A (en)

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