JP6255194B2 - Wheel bearing device - Google Patents

Wheel bearing device Download PDF

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JP6255194B2
JP6255194B2 JP2013189231A JP2013189231A JP6255194B2 JP 6255194 B2 JP6255194 B2 JP 6255194B2 JP 2013189231 A JP2013189231 A JP 2013189231A JP 2013189231 A JP2013189231 A JP 2013189231A JP 6255194 B2 JP6255194 B2 JP 6255194B2
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carbon fiber
wheel
ring
bearing device
hub
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大槻　寿志
寿志 大槻
奈都子 永井
奈都子 永井
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NTN Corp
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Description

本発明は、自動車等の車輪を回転自在に支承する車輪用軸受装置、特に、軽量・コンパクト化を図りつつ、軸受寿命を確保した車輪用軸受装置に関するものである。   The present invention relates to a wheel bearing device that rotatably supports a wheel of an automobile or the like, and more particularly to a wheel bearing device that secures a bearing life while reducing the weight and size.

従来から自動車等の車輪を支持する車輪用軸受装置は、車輪を取り付けるためのハブ輪を転がり軸受を介して回転自在に支承するもので、駆動輪用と従動輪用とがある。構造上の理由から、駆動輪用では内輪回転方式が、従動輪用では内輪回転と外輪回転の両方式が一般的に採用されている。この車輪用軸受装置には、所望の軸受剛性を有し、ミスアライメントに対しても耐久性を発揮すると共に、燃費向上の観点から回転トルクが小さい複列アンギュラ玉軸受が多用されている。この複列アンギュラ玉軸受は、固定輪と回転輪との間に複数のボールを介在させ、このボールに所定の接触角を付与して固定輪および回転輪に接触させている。   2. Description of the Related Art Conventionally, a wheel bearing device for supporting a wheel of an automobile or the like is such that a hub wheel for mounting a wheel is rotatably supported via a rolling bearing, and there are a drive wheel and a driven wheel. For structural reasons, an inner ring rotation method is generally used for driving wheels, and an inner ring rotation method and an outer ring rotation method are generally used for driven wheels. As the wheel bearing device, a double-row angular ball bearing having a desired bearing rigidity, exhibiting durability against misalignment, and having a small rotational torque from the viewpoint of improving fuel efficiency is often used. In this double row angular contact ball bearing, a plurality of balls are interposed between a fixed ring and a rotating ring, and a predetermined contact angle is given to the balls so as to contact the fixed ring and the rotating ring.

また、車輪用軸受装置には、懸架装置を構成するナックルとハブ輪との間に複列アンギュラ玉軸受等からなる車輪用軸受を嵌合させた第１世代と称される構造から、外方部材の外周に直接車体取付フランジまたは車輪取付フランジが形成された第２世代構造、あるいは、ハブ輪の外周に一方の内側転走面が直接形成された第３世代構造とに大別されている。   Further, the wheel bearing device has a structure called a first generation in which a wheel bearing composed of a double row angular ball bearing or the like is fitted between a knuckle and a hub wheel constituting a suspension device. It is roughly classified into a second generation structure in which a body mounting flange or a wheel mounting flange is directly formed on the outer periphery of the member, or a third generation structure in which one inner rolling surface is directly formed on the outer periphery of the hub wheel. .

近年、こうした車輪用軸受装置において、耐久性の向上や低コスト化は無論のこと、燃費向上のために軽量化が進んでいる。例えば、図９に示す車輪用軸受装置５１は、内方部材５２と、外方部材５３と、複列のボール５４とを備えている。内方部材５２は、ハブ輪５５と、このハブ輪５５に固定された内輪５６とからなる。ハブ輪５５は、外周に車輪取付フランジ５５ａと、内側転走面５５ｂと、小径段部５５ｃとが形成されている。内輪５６は、外周に内側転走面５６ａが形成され、ハブ輪５５の小径段部５５ｃに圧入固定されている。   In recent years, in such wheel bearing devices, not only improvement in durability and cost reduction, but also weight reduction has been progressing in order to improve fuel efficiency. For example, the wheel bearing device 51 shown in FIG. 9 includes an inner member 52, an outer member 53, and double-row balls 54. The inner member 52 includes a hub ring 55 and an inner ring 56 fixed to the hub ring 55. The hub wheel 55 has a wheel mounting flange 55a, an inner rolling surface 55b, and a small-diameter step portion 55c formed on the outer periphery. The inner ring 56 has an inner rolling surface 56 a formed on the outer periphery, and is press-fitted and fixed to the small-diameter step portion 55 c of the hub ring 55.

外方部材５３は、内方部材５２の外方に配置され、図１０に示すように、取付部材５７と外輪５８とを備えている。取付部材５７は、略円筒状に形成され、アルミ二ウム合金またはマグネシウム合金等、鋼以外の軽量な材料により形成されている。これにより、外方部材５３を軽量化することが可能となる。   The outer member 53 is disposed outside the inner member 52 and includes an attachment member 57 and an outer ring 58 as shown in FIG. The attachment member 57 is formed in a substantially cylindrical shape, and is formed of a lightweight material other than steel, such as an aluminum alloy or a magnesium alloy. Thereby, the outer member 53 can be reduced in weight.

取付部材５７の外周面には、車体取付フランジ５９が形成され、この車体取付フランジ５９は、円筒状の基部５９ａと、ナックル取付部５９ｂとを有している。ナックル取付部５９ｂは、基部５９ａの外周面に等間隔で複数個形成され、ナックル取付部５９ｂには、図示しない車両の懸架装置（ナックル）が取付けられる。   A vehicle body attachment flange 59 is formed on the outer peripheral surface of the attachment member 57, and the vehicle body attachment flange 59 has a cylindrical base portion 59a and a knuckle attachment portion 59b. A plurality of knuckle attachment portions 59b are formed at equal intervals on the outer peripheral surface of the base portion 59a, and a vehicle suspension device (knuckle) (not shown) is attached to the knuckle attachment portion 59b.

外輪５８は、外周面が取付部材５７の内周面と接触した状態で、取付部材５７の内方に配置されている。外輪５８は、汎用軸受に用いられる軸受鋼を材料として、通常の焼入れによって硬化処理が施されている。そして、外輪５８の硬度は、転がり疲労寿命に必要な硬度として６５０Ｈｖ（ビッカース硬さ）以上に選定されている。   The outer ring 58 is disposed on the inner side of the mounting member 57 in a state where the outer peripheral surface is in contact with the inner peripheral surface of the mounting member 57. The outer ring 58 is hardened by ordinary quenching using bearing steel used for general-purpose bearings as a material. And the hardness of the outer ring | wheel 58 is selected as 650Hv (Vickers hardness) or more as hardness required for a rolling fatigue life.

外輪５８は、内周に複列の外側転走面５８ａ、５８ａが形成され、この外側転走面５８ａが形成されている部分における最小肉厚Ｗ（以下、最小肉厚Ｗとする）は、ボール５４の直径の１０％以上４０％以下に選定されている。好ましくは、最小肉厚Ｗは、ボール５４の直径の２０％以上３０％以下に選定される。これにより、外輪５８について、軽量化しつつ、適切な転がり疲労寿命を確保することが可能となる。   The outer ring 58 has double row outer rolling surfaces 58a, 58a formed on the inner periphery, and the minimum thickness W (hereinafter referred to as the minimum thickness W) in the portion where the outer rolling surfaces 58a are formed is: It is selected to be 10% or more and 40% or less of the diameter of the ball 54. Preferably, the minimum thickness W is selected to be 20% or more and 30% or less of the diameter of the ball 54. Thereby, it is possible to ensure an appropriate rolling fatigue life while reducing the weight of the outer ring 58.

外輪５８の厚肉部５８ｂの軸方向の略中央位置には、取付部材５７と外輪５８とが組み合わされた状態で、挿通孔６０と一連となる雌ねじ穴６１が形成されている。この雌ねじ穴６１にボルトからなる固定部材６２が締結されている。これにより、取付部材５７と外輪５８との間にクリープ現象が発生するのを抑制することが可能となる（例えば、特許文献１参照。）。   A female screw hole 61 is formed at a substantially central position in the axial direction of the thick part 58 b of the outer ring 58 in a state where the mounting member 57 and the outer ring 58 are combined with each other and the insertion hole 60. A fixing member 62 made of a bolt is fastened to the female screw hole 61. Thereby, it is possible to suppress the occurrence of a creep phenomenon between the attachment member 57 and the outer ring 58 (see, for example, Patent Document 1).

この従来の車輪用軸受装置５１では、軽量化を図りつつ、軸受寿命と耐クリープ性を確保することができるという特徴を備えている。然しながら、取付部材５７の材料として例示されているアルミ二ウム合金またはマグネシウム合金あるいは炭素繊維やガラス繊維入りの合成樹脂、所謂補強繊維強化プラスチックにおいて、例えば、アルミ二ウム合金は比重２．７で引張強度２６０Ｎ／ｍｍ２、マグネシウム合金では比重１．８で引張強度２４０Ｎ／ｍｍ２であり、炭素鋼材の比重７．７、引張強度７８０Ｎ／ｍｍ２と比較すると、比重は炭素鋼材を１００とした時、アルミ二ウム合金は３５、マグネシウム合金では２３であるが、引張強度は炭素鋼材を１００とした時、アルミ二ウム合金で３３、マグネシウム合金では３１となる。すなわち、炭素鋼材と同等の引張強度を得るには、いずれも略３倍の断面積を必要とするので、軽量化の効果は、アルミ二ウム合金ではほとんどなく、また、マグネシウム合金では略３０％で軽量・コンパクト化にはならない現状である。 This conventional wheel bearing device 51 has a feature that the bearing life and the creep resistance can be ensured while reducing the weight. However, in the aluminum alloy or magnesium alloy exemplified as the material of the mounting member 57, or a synthetic resin containing carbon fiber or glass fiber, so-called reinforced fiber reinforced plastic, for example, the aluminum alloy is pulled at a specific gravity of 2.7. strength 260 N / mm 2, the intensity 240 N / mm 2 tensile specific gravity 1.8 is magnesium alloy, the specific gravity 7.7 of carbon steel, when compared to the tensile strength 780N / mm 2, when the specific gravity is taken as 100 carbon steel The aluminum alloy is 35 and the magnesium alloy is 23. However, when the carbon steel material is 100, the tensile strength is 33 for the aluminum alloy and 31 for the magnesium alloy. That is, in order to obtain a tensile strength equivalent to that of carbon steel, all require a cross-sectional area approximately three times that of the aluminum alloy, so the effect of weight reduction is almost not that of an aluminum alloy, and that of a magnesium alloy is approximately 30%. However, it is not light and compact.

一方、ペレット状の材料を射出成形する炭素繊維強化プラスチック（ＣＦＲＰ）では、炭素繊維と樹脂の割合が５０％前後で比重２．０前後となるが、炭素繊維が短く裁断されるため、引張強度は期待できなく、合金と同様、断面積を大きくする必要があり、軽量・コンパクト化の実現は難しい。ここで、炭素繊維強化プラスチック（ＣＦＲＰ）とは、炭素繊維（ＣＦ）とエポキシ樹脂等の熱硬化性樹脂をバインダで積層した複合材料をいう。   On the other hand, in carbon fiber reinforced plastic (CFRP) in which a pellet-shaped material is injection-molded, the ratio of carbon fiber to resin is around 50% and the specific gravity is around 2.0. However, the carbon fiber is cut short, so the tensile strength Like the alloy, it is necessary to increase the cross-sectional area, and it is difficult to realize light weight and compactness. Here, the carbon fiber reinforced plastic (CFRP) refers to a composite material in which a carbon fiber (CF) and a thermosetting resin such as an epoxy resin are laminated with a binder.

こうした問題を解決すべく、例えば、図１１に示すような車輪用軸受装置が提案されている。この車輪用軸受装置は、ハブ輪６３や外方部材６４の車輪取付フランジ６５および車体取付フランジ６６の一部を、プリプレグ（の状態）を経て積層された炭素繊維複合材料で形成し、このフランジ部６５ａ、６６ａに、外周に凹凸形状を有する円筒状の金属製部材を介して固定ボルト６７が締結されるようにし、軽量化を図っている（例えば、特許文献２参照。）。ここで、プリプレグとはＣＦＲＰの中間体で、炭素繊維に熱硬化性樹脂を含浸させた半硬化状態のものをいい、プレスと熱により硬化させてＣＦＲＰになる。   In order to solve these problems, for example, a wheel bearing device as shown in FIG. 11 has been proposed. In this wheel bearing device, a part of the wheel mounting flange 65 and the vehicle body mounting flange 66 of the hub wheel 63 and the outer member 64 is formed of a carbon fiber composite material laminated through a prepreg. The fixing bolt 67 is fastened to the portions 65a and 66a via a cylindrical metal member having an uneven shape on the outer periphery to reduce the weight (for example, see Patent Document 2). Here, the prepreg is an intermediate of CFRP, which is a semi-cured state in which a carbon fiber is impregnated with a thermosetting resin, and is cured by pressing and heat to become CFRP.

特開２０１１−１４９４７８号公報JP2011-149478A 特開２０１２−５１３８３号公報JP 2012-51383 A

然しながら、この従来の車輪用軸受装置では、ハブ輪６３や外方部材６４のフランジ部６５ａ、６６ａのみをプリプレグを経て積層された炭素繊維複合材料で構成しているため、軽量化には限界があり大きな効果が期待できない。   However, in this conventional wheel bearing device, since only the flange portions 65a and 66a of the hub wheel 63 and the outer member 64 are made of the carbon fiber composite material laminated through the prepreg, there is a limit to weight reduction. There is no big effect.

本発明は、このような事情に鑑みてなされたもので、転動体が転走する軌道面やシールが摺動する摺動面を金属製部材とし、最大限この金属製部材の占める割合を減らし、その他の部位をプリプレグを経て積層された炭素繊維複合材料で構成することに着想し、軽量・コンパクト化を図りつつ、軸受寿命を確保した車輪用軸受装置を提供することを目的としている。   The present invention has been made in view of such circumstances. The raceway surface on which the rolling elements roll and the sliding surface on which the seal slides are made of metal members, and the proportion of the metal members is reduced to the maximum. Another object is to provide a wheel bearing device that ensures a bearing life while reducing the weight and size while conceiving that other parts are made of a carbon fiber composite material laminated through a prepreg.

係る目的を達成すべく、本発明のうち請求項１記載の発明は、内周に複列の外側転走面が一体に形成された外方部材と、外周に前記複列の外側転走面に対向する複列の内側転走面が形成された内方部材と、この内方部材と前記外方部材の両転走面間に保持器を介して転動自在に収容された複列の転動体と、前記外方部材と内方部材の間に形成された環状空間の開口部に装着されたシールと、を備え、前記外方部材と内方部材のうち回転側となる部材のアウター側の端部に車輪を取り付けるための車輪取付フランジが一体に形成された車輪用軸受装置において、前記外方部材が、前記転走面が形成された軌道部材と、前記シールが摺動する部位が金属部材からなり、その他の部位が、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料で構成され、前記内方部材が、ハブ輪と、このハブ輪に固定された少なくとも一つの内輪からなり、前記ハブ輪が前記車輪取付フランジを一体に有し、成形後の外周形状に倣う凹状の型に、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料を巻き付けて円筒状に形成され、クロス状に編み込んだ炭素繊維で覆い合成樹脂で固化され、前記車輪取付フランジのインナー側の肩部を介して軸方向に延びる円筒状の小径段部を備えると共に、この小径段部に前記内輪が圧入されている。 In order to achieve the object, the invention according to claim 1 of the present invention includes an outer member in which a double row outer rolling surface is integrally formed on the inner periphery, and an outer rolling surface of the double row on the outer periphery. An inner member in which a double row inner rolling surface facing the inner member is formed, and a double row of the inner member and the outer member that are accommodated so as to roll freely between the rolling surfaces of the inner member and the outer member. A rolling element, and a seal attached to an opening of an annular space formed between the outer member and the inner member, and an outer member of the outer member and the inner member on the rotating side. in the wheel bearing apparatus of the wheel mounting flange is formed integrally for attaching a wheel to the end of the side, the outer member comprises a track member, wherein the rolling run surface is formed, the seal slides The part is made of a metal member, the other part is mainly carbon fiber, and the carbon is molded with synthetic resin Consists of Wei composite material, wherein the inner member is a hub wheel, this is fixed to the wheel hub was made from at least one of the inner ring, the hub wheel integrally includes the wheel mounting flange, the outer peripheral shape of the molded Is formed in a cylindrical shape by winding a carbon fiber composite material mainly composed of carbon fiber and molded with a synthetic resin as a binder, and covered with a carbon fiber knitted into a cross shape, and solidified with a synthetic resin. A cylindrical small-diameter step portion extending in the axial direction via the inner shoulder portion of the mounting flange is provided, and the inner ring is press-fitted into the small-diameter step portion .

このように、第１乃至３世代構造の車輪用軸受装置において、外方部材が、転走面が形成された軌道部材と、シールが摺動する部位が金属部材からなり、その他の部位が、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料で構成され、内方部材が、ハブ輪と、このハブ輪に固定された少なくとも一つの内輪からなり、ハブ輪が車輪取付フランジを一体に有し、成形後の外周形状に倣う凹状の型に、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料を巻き付けて円筒状に形成され、クロス状に編み込んだ炭素繊維で覆い合成樹脂で固化され、車輪取付フランジのインナー側の肩部を介して軸方向に延びる円筒状の小径段部を備えると共に、この小径段部に内輪が圧入されているので、金属製部材の占める割合を最大限に減らし、軽量・コンパクト化を図りつつ、軸受寿命を確保した車輪用軸受装置を提供することができる。 Thus, in the wheel bearing apparatus of the first to third generation type, the outer member is a race member rolling run surface is formed, the site of the seal slides are made of a metal member, and other sites , Composed of carbon fiber composite material mainly composed of carbon fiber and molded with synthetic resin as binder , inner member consists of hub ring and at least one inner ring fixed to this hub ring, which is wheel-mounted It is formed into a cylindrical shape by wrapping a carbon fiber composite material mainly composed of carbon fiber and molded with synthetic resin as a binder around a concave mold that has an integrated flange and follows the outer peripheral shape after molding, and knitted in a cross shape Since it is covered with carbon fiber and solidified with synthetic resin, it has a cylindrical small-diameter stepped portion extending in the axial direction via the shoulder on the inner side of the wheel mounting flange, and the inner ring is press-fitted into this small-diameter stepped portion. Made parts The percentage decrease in maximum, while reducing the weight and size, it is possible to provide a wheel bearing apparatus that ensures the bearing life.

好ましくは、請求項２に記載の発明のように、前記外方部材の軌道部材が炭素鋼から塑性加工によって形成されていれば、生産性が向上して歩溜まりが良く低コスト化ができると共に、従来の鍛造、削り出しの軸受と同等の軸受精度を確保することができる。   Preferably, as in the invention described in claim 2, if the raceway member of the outer member is formed from carbon steel by plastic working, productivity is improved, yield is improved, and cost can be reduced. The same bearing accuracy as that of conventional forged and machined bearings can be ensured.

また、請求項３に記載の発明のように、前記内方部材が、前記軌道部材となるハブ輪と、このハブ輪に固定された内輪を備え、前記ハブ輪が炭素鋼から塑性加工によって形成され、アウター側の端部に径方向外方に延びるフランジ基部を一体に有し、外周にアウター側の内側転走面と、この内側転走面から軸方向に延び、外周にインナー側の内側転走面が形成された内輪が圧入される円筒状の小径段部が形成されていれば、生産性が向上して歩溜まりが良く低コスト化ができると共に、従来の鍛造、削り出しの軸受と同等の軸受精度を確保することができる。   According to a third aspect of the present invention, the inner member includes a hub ring serving as the raceway member and an inner ring fixed to the hub ring, and the hub ring is formed from carbon steel by plastic working. A flange base that extends radially outward at the outer end, and an outer inner rolling surface on the outer periphery and an axially extending from the inner rolling surface, and an inner inner surface on the outer periphery. If a cylindrical small-diameter stepped portion into which the inner ring on which the rolling surface is formed is press-fitted is formed, productivity can be improved, yield can be reduced, and costs can be reduced. Conventional forged and machined bearings The bearing accuracy equivalent to can be ensured.

また、請求項４に記載の発明のように、前記ハブ輪の小径段部のインナー側の端部を径方向外方に塑性変形させて形成した加締部によって所定の軸受予圧が付与された状態で当該ハブ輪に対して前記内輪が軸方向に固定されていても良い。   Further, as in the invention according to claim 4, a predetermined bearing preload is applied by a caulking portion formed by plastically deforming an inner side end portion of the small-diameter step portion of the hub wheel radially outward. In the state, the inner ring may be fixed in the axial direction with respect to the hub ring.

また、請求項５に記載の発明のように、前記外方部材が、前記軌道部材の外周面側に配置され、外周にナックルに取り付けられるための車体取付フランジを一体に有する外殻部材を備え、この外殻部材が、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料で構成され、前記軌道部材の外周面に沿って巻き付けや貼り付けて合成樹脂で固めて接合された炭素繊維を主として樹脂によって成形された炭素繊維複合材料で構成されていれば、強度・剛性を確保しつつ軽量化を図ることができる。   According to a fifth aspect of the present invention, the outer member includes an outer shell member that is disposed on the outer peripheral surface side of the raceway member and integrally includes a vehicle body mounting flange that is attached to a knuckle on the outer periphery. The outer shell member is composed of a carbon fiber composite material mainly composed of carbon fiber and formed of a synthetic resin as a binder, and is wound and pasted along the outer peripheral surface of the raceway member to be solidified and bonded with the synthetic resin. If the carbon fiber is composed of a carbon fiber composite material formed mainly from a resin, the weight can be reduced while ensuring the strength and rigidity.

また、請求項６に記載の発明のように、前記内方部材が、前記軌道部材の内周面側に配置され、前記車輪取付フランジを一体に有する内殻部材を備え、この内殻部材が、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料で構成され、前記軌道部材の内周面に沿って巻き付けや貼り付けて合成樹脂で固めて接合された炭素繊維を主として樹脂によって成形された炭素繊維複合材料で構成されていれば、強度・剛性を確保しつつ軽量化を図ることができる。   According to a sixth aspect of the present invention, the inner member includes an inner shell member that is disposed on the inner peripheral surface side of the track member and integrally includes the wheel mounting flange. The carbon fiber is mainly composed of a carbon fiber composite material formed of a synthetic resin as a binder and is formed of a synthetic resin as a binder. If it is comprised with the carbon fiber composite material shape | molded by this, weight reduction can be achieved, ensuring intensity | strength and rigidity.

また、請求項７に記載の発明のように、前記ハブ輪が、そのインナー側の端部にインサート成形され、炭素鋼から塑性加工によってカップ状に形成された加締部材を備え、この加締部材のインナー側の端部を径方向外方に塑性変形させて形成した加締部によって所定の軸受予圧が付与された状態で当該ハブ輪に対して前記内輪が軸方向に固定されていれば、軽量化を図りつつ、簡単な構成で軸受を固定することができる。 According to a seventh aspect of the present invention, the hub wheel includes a crimping member that is insert-molded at an end portion on the inner side thereof and formed into a cup shape from carbon steel by plastic working. If the inner ring is fixed in the axial direction with respect to the hub ring in a state where a predetermined bearing preload is applied by a caulking portion formed by plastically deforming the end portion on the inner side of the member radially outward The bearing can be fixed with a simple configuration while reducing the weight.

また、請求項８に記載の発明のように、前記外方部材が、前記軌道部材の外周面側に配置され、外周にナックルに取り付けられるための車体取付フランジが固定された円環状の取付部材と、炭素鋼からなる外輪を備え、前記取付部材が、成形後の内周形状に倣う凸状の型に、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料を巻き付けて円筒状に形成され、クロス状に編み込んだ炭素繊維で覆い合成樹脂で固化され、内周に円筒状の嵌合面と、この嵌合面のインナー側の端部に鍔部と、アウター側の端部に環状の止め輪溝が一体に形成されると共に、当該嵌合面に前記外輪が圧入され、前記止め輪溝に装着される止め輪と前記鍔部によって軸方向に位置決め固定されていれば、車輪用軸受装置の軽量化を図りつつ、標準仕様の軸受を適用することができ、低コスト化を図ることができる。また、軽量化を図るためにナックルをアルミ合金製とした場合でも、鋼製の外輪と軽合金製のナックルとの組み合せによってナックルに電食が発生するのを防止し、信頼性を向上させることができる。 It is preferable as defined in claim 8, wherein the outer member is, the track member is disposed on the outer peripheral surface of the mounting of annular car body mounting flange is fixed to attached to the knuckle on the outer periphery A member and an outer ring made of carbon steel, and the mounting member is formed by winding a carbon fiber composite material formed mainly of carbon fiber and formed of a synthetic resin as a binder around a convex mold that follows the inner peripheral shape after molding. It is formed in a cylindrical shape, covered with carbon fibers knitted in a cross shape, solidified with synthetic resin, a cylindrical fitting surface on the inner periphery, a flange on the inner side end of this fitting surface, and an outer side An annular retaining ring groove is integrally formed at the end, and the outer ring is press-fitted into the fitting surface, and is positioned and fixed in the axial direction by a retaining ring and the flange that are mounted in the retaining ring groove. For example, while reducing the weight of the wheel bearing device, Can be applied to the bearing specifications, it is possible to reduce the cost. Even if the knuckle is made of an aluminum alloy to reduce the weight, the combination of a steel outer ring and a light alloy knuckle prevents the occurrence of electrolytic corrosion on the knuckle and improves reliability. Can do.

また、請求項９に記載の発明のように、前記取付部材の嵌合面のインナー側の端部に肩部と、この肩部から径方向内方に延び、前記内方部材のインナー側の端部を閉塞する底部が一体に形成され、前記止め輪と肩部によって前記外輪が軸方向に位置決め固定されていれば、軸受部の密封性を向上させることができる。 Further, as in the ninth aspect of the present invention, a shoulder portion is provided at an inner end portion of the fitting surface of the mounting member, and extends radially inward from the shoulder portion. If the bottom portion that closes the end portion is integrally formed and the outer ring is positioned and fixed in the axial direction by the retaining ring and the shoulder portion, the sealability of the bearing portion can be improved.

また、請求項１０に記載の発明のように、前記外方部材が、前記軌道部材の外周面側に配置され、外周にナックルに取り付けられるための車体取付フランジを備え、この車体取付フランジと前記車輪取付フランジが、炭素繊維を主とし、バインダとして合成樹脂で成形したものをクロス状に編み込んだ炭素繊維を予めフランジ外周の輪郭形状に成形して合成樹脂で固めた板材を軸方向に複数枚積層させた炭素繊維を主として樹脂によって成形された炭素繊維複合材料で構成されていれば、軽量化を図りつつ、強度面でも従来の金属部材を上まることができる。 According to a tenth aspect of the present invention, the outer member includes a vehicle body mounting flange that is disposed on the outer peripheral surface side of the track member and is attached to a knuckle on the outer periphery. The wheel mounting flange is made mainly of carbon fiber, and a plurality of plates in the axial direction are made of carbon fiber, which is made of synthetic resin as a binder and knitted into a cross shape in advance, and then molded into the contour shape of the flange outer periphery and hardened with synthetic resin If the laminated carbon fiber is composed of a carbon fiber composite material formed mainly from a resin, the conventional metal member can be increased in terms of strength while reducing the weight.

本発明に係る車輪用軸受装置は、内周に複列の外側転走面が一体に形成された外方部材と、外周に前記複列の外側転走面に対向する複列の内側転走面が形成された内方部材と、この内方部材と前記外方部材の両転走面間に保持器を介して転動自在に収容された複列の転動体と、前記外方部材と内方部材の間に形成された環状空間の開口部に装着されたシールと、を備え、前記外方部材と内方部材のうち回転側となる部材のアウター側の端部に車輪を取り付けるための車輪取付フランジが一体に形成された車輪用軸受装置において、前記外方部材が、前記転走面が形成された軌道部材と、前記シールが摺動する部位が金属部材からなり、その他の部位が、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料で構成され、前記内方部材が、ハブ輪と、このハブ輪に固定された少なくとも一つの内輪からなり、前記ハブ輪が前記車輪取付フランジを一体に有し、成形後の外周形状に倣う凹状の型に、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料を巻き付けて円筒状に形成され、クロス状に編み込んだ炭素繊維で覆い合成樹脂で固化され、前記車輪取付フランジのインナー側の肩部を介して軸方向に延びる円筒状の小径段部を備えると共に、この小径段部に前記内輪が圧入されているので、金属製部材の占める割合を最大限に減らし、軽量・コンパクト化を図りつつ、軸受寿命を確保した車輪用軸受装置を提供することができる。 The wheel bearing device according to the present invention includes an outer member in which a double row outer rolling surface is integrally formed on an inner periphery, and a double row inner rolling that faces the outer rolling surface of the double row on an outer periphery. An inner member having a surface formed thereon, a double row rolling element housed between the rolling surfaces of the inner member and the outer member via a cage, and the outer member; A seal mounted in an opening of an annular space formed between the inner members, and for attaching a wheel to the outer end of the outer member and the inner member on the rotating side of the member in the wheel mounting flange of the bearing device for a wheel formed integrally, the outer member has a raceway member in which the rolling run surface is formed, the site where the seal slides are made of a metal member, other sites, mainly carbon fiber, composed of carbon fiber composite material obtained by molding a synthetic resin as a binder, before The inner member is composed of a hub wheel and at least one inner ring fixed to the hub wheel, and the hub wheel has the wheel mounting flange integrally and is formed into a concave mold following the outer peripheral shape after molding. A carbon fiber composite material mainly composed of fibers and formed of a synthetic resin as a binder is wound around and formed into a cylindrical shape, covered with a carbon fiber knitted into a cloth shape, solidified with a synthetic resin, and the shoulder on the inner side of the wheel mounting flange A cylindrical small-diameter step portion extending in the axial direction via the inner ring, and the inner ring is press-fitted into the small-diameter step portion, so that the proportion of the metal member is reduced to the maximum, and light weight and compactness are achieved. In addition, a wheel bearing device having a long bearing life can be provided.

本発明に係る車輪用軸受装置の第１の実施形態を示す縦断面図である。It is a longitudinal section showing a 1st embodiment of a bearing device for wheels concerning the present invention. 図１の内殻部材と外殻部材を構成する炭素繊維帯を示す説明図である。It is explanatory drawing which shows the carbon fiber band which comprises the inner shell member and outer shell member of FIG. （ａ）は、図１の車輪取付フランジと車体取付フランジを構成する炭素繊維板を示す説明図、（ｂ）は、（ａ）の炭素繊維板を積層した状態を示す説明図である。(A) is explanatory drawing which shows the carbon fiber board which comprises the wheel attachment flange and vehicle body attachment flange of FIG. 1, (b) is explanatory drawing which shows the state which laminated | stacked the carbon fiber board of (a). 本発明に係る車輪用軸受装置の第２の実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows 2nd Embodiment of the wheel bearing apparatus which concerns on this invention. 本発明に係る車輪用軸受装置の第３の実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows 3rd Embodiment of the wheel bearing apparatus which concerns on this invention. 本発明に係る車輪用軸受装置の第４の実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows 4th Embodiment of the wheel bearing apparatus which concerns on this invention. 本発明に係る車輪用軸受装置の第５の実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows 5th Embodiment of the wheel bearing apparatus which concerns on this invention. 本発明に係る車輪用軸受装置の第６の実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows 6th Embodiment of the wheel bearing apparatus which concerns on this invention. 従来の車輪用軸受装置を示す縦断面図である。It is a longitudinal cross-sectional view which shows the conventional wheel bearing apparatus. 図９の外方部材を示す縦断面図である。It is a longitudinal cross-sectional view which shows the outward member of FIG. 他の従来の車輪用軸受装置を示す縦断面図である。It is a longitudinal cross-sectional view which shows the other conventional wheel bearing apparatus.

外周にナックルに取り付けられるための車体取付フランジを有し、内周に複列の外側転走面が一体に形成された外方部材と、アウター側の端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に前記複列の外側転走面の一方に対向する内側転走面と、この内側転走面から軸方向に延びる円筒状の小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に所定のシメシロを介して圧入され、外周に前記複列の外側転走面の他方に対向する内側転走面が形成された内輪からなる内方部材と、この内方部材と前記外方部材の両転走面間に保持器を介して転動自在に収容された複列の転動体と、前記外方部材と内方部材の間に形成される環状空間の開口部に装着されたシールと、を備えた車輪用軸受装置において、前記外方部材が、炭素鋼から塑性加工によって形成された外側軌道部材と、この外側軌道部材の外周面側に配置された外殻部材とを備え、この外殻部材が、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料で構成され、前記外側軌道部材の外周面に沿ってそれぞれ巻き付けや貼り付けて合成樹脂で固めて接合されると共に、前記車体取付フランジが、炭素繊維を主とし、バインダとして合成樹脂で成形したものをクロス状に編み込んだ炭素繊維を予めフランジ外周の輪郭形状に成形して合成樹脂で固めた板材を軸方向に複数枚積層させて固定した後、表層をクロス状に編み込んだ帯状の炭素繊維で覆い合成樹脂で固化して形成されている。   An outer member having a vehicle body mounting flange to be attached to a knuckle on the outer periphery, a double row outer rolling surface formed integrally on the inner periphery, and a wheel mounting flange for mounting a wheel to an end portion on the outer side A hub ring formed on the outer periphery with an inner rolling surface facing one of the outer rolling surfaces of the double row, and a cylindrical small diameter step portion extending in the axial direction from the inner rolling surface, And an inner member formed of an inner ring that is press-fitted into a small-diameter step portion of the hub ring through a predetermined shimoshiro and has an inner rolling surface facing the other of the outer rolling surfaces of the double row on the outer periphery, An annular space formed between the outer member and the inner member, and a double row rolling element accommodated between the rolling surfaces of the inner member and the outer member via a cage. And a seal mounted on the opening of the wheel bearing device, wherein the outer member is An outer race member formed by plastic working from carbon steel, and an outer shell member disposed on the outer peripheral surface side of the outer race member, the outer shell member is mainly made of carbon fiber and is made of synthetic resin as a binder. It is composed of a molded carbon fiber composite material, and is wound and affixed along the outer peripheral surface of the outer race member and joined with a synthetic resin, and the vehicle body mounting flange is mainly composed of carbon fiber as a binder. After carbon fiber knitted in a synthetic resin is knitted into a cross shape, a plurality of plate materials that have been molded into a contour shape around the flange in advance and hardened with synthetic resin are laminated and fixed in the axial direction, and then the surface layer is knitted in a cross shape Covered with strip-shaped carbon fiber and solidified with synthetic resin.

以下、本発明の実施の形態を図面に基づいて詳細に説明する。
図１は、本発明に係る車輪用軸受装置の第１の実施形態を示す縦断面図、図２は、図１の内殻部材と外殻部材を構成する炭素繊維帯を示す説明図、図３（ａ）は、図１の車輪取付フランジと車体取付フランジを構成する炭素繊維板を示す説明図、（ｂ）は、（ａ）の炭素繊維板を積層した状態を示す説明図である。なお、以下の説明では、車両に組み付けた状態で車両の外側寄りとなる側をアウター側（図１の左側）、中央寄り側をインナー側（図１の右側）という。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention. FIG. 2 is an explanatory view showing a carbon fiber band constituting the inner shell member and the outer shell member of FIG. 3 (a) is an explanatory view showing a carbon fiber plate constituting the wheel attachment flange and the vehicle body attachment flange of FIG. 1, and (b) is an explanatory view showing a state in which the carbon fiber plates of (a) are laminated. In the following description, the side closer to the outer side of the vehicle when assembled to the vehicle is referred to as the outer side (left side in FIG. 1), and the side closer to the center is referred to as the inner side (right side in FIG. 1).

この車輪用軸受装置は第３世代と呼称される従動輪用であって、内方部材１と、この内方部材１に複列の転動体（ボール）３を介して外挿された外方部材２とを備えている。内方部材１は、ハブ輪４と、このハブ輪４に固定された内輪５とからなる。   This wheel bearing device is for a driven wheel called a third generation, and is an outer member 1 and an outer member externally inserted into the inner member 1 through double-row rolling elements (balls) 3. And a member 2. The inner member 1 includes a hub ring 4 and an inner ring 5 fixed to the hub ring 4.

ハブ輪４は、金属部材からなる内側軌道部材６と、この内側軌道部材６の内周面側に配置された内殻部材７と、内側軌道部材６の外周面側に配置された外殻部材８とで構成されている。内側軌道部材６は、ＳＵＪ２等の高炭素クロム軸受鋼からなるパイプ材を焼鈍した後、プレス加工または冷間のローリング加工（以下、塑性加工という）によって形成され、アウター側の端部に径方向外方に延びるフランジ基部９を一体に有し、外周に一方（アウター側）の内側転走面６ａと、この内側転走面６ａから軸方向に延びる円筒状の小径段部６ｂが形成されている。そして、後述するアウター側のシール２２のランド部となる肩部１０と内側転走面６ａが高周波焼入れによって表面硬さを５０〜６５ＨＲＣの範囲に硬化層（図中クロスハッチングにて示す）１１が形成されている。これにより、生産性が向上して歩溜まりが良く低コスト化ができると共に、従来の鍛造、削り出しの軸受と同等の軸受精度を確保することができる。なお、内側軌道部材６の材質としてこれ以外にも、Ｓ５０Ｃ〜Ｓ５５Ｃや冷間圧延鋼板（ＪＩＳ規格のＳＰＣＣ系等）等の炭素鋼あるいはＳＣｒ４２０やＳＣＭ４４０等の浸炭鋼を例示することができる。この場合、浸炭焼入れによって表面硬さを５０〜６５ＨＲＣの範囲に硬化処理が施される。   The hub ring 4 includes an inner race member 6 made of a metal member, an inner shell member 7 disposed on the inner peripheral surface side of the inner race member 6, and an outer shell member disposed on the outer peripheral surface side of the inner race member 6. 8. The inner race member 6 is formed by annealing a pipe material made of a high carbon chrome bearing steel such as SUJ2 and then pressing or cold rolling (hereinafter referred to as plastic working), and is radially formed at the outer end. A flange base portion 9 extending outward is integrally formed, and one (outer side) inner rolling surface 6a and a cylindrical small diameter step portion 6b extending in the axial direction from the inner rolling surface 6a are formed on the outer periphery. Yes. And the shoulder part 10 used as the land part of the outer side seal | sticker 22 mentioned later, and the inner side rolling surface 6a are the hardened layers (it shows by cross-hatching) 11 in the range of 50-65HRC surface hardness by induction hardening. Is formed. As a result, the productivity is improved, the yield is good, the cost can be reduced, and the bearing accuracy equivalent to that of conventional forged and machined bearings can be secured. Other examples of the material of the inner race member 6 include carbon steel such as S50C to S55C and cold-rolled steel plate (JIS standard SPCC system), and carburized steel such as SCr420 and SCM440. In this case, the hardening process is performed in the range of 50 to 65 HRC by carburizing and quenching.

内輪５はＳＵＪ２等の高炭素クロム軸受鋼からなり、外周に他方（インナー側）の内側転走面５ａが形成され、ズブ焼入れによって芯部まで５８〜６５ＨＲＣの範囲に硬化処理されている。そして、内側軌道部材６の小径段部６ｂに後述する外殻部材８を介して所定のシメシロで圧入され、この小径段部６ｂの端部を径方向外方に塑性変形させて形成した加締部６ｃによって所定の軸受予圧が付与された状態でハブ輪４に対して軸方向に固定されている。なお、加締部６ｃは未焼入れ部とされ、加締加工によって微小クラック等が発生するのを防止している。また、転動体３はＳＵＪ２等の高炭素クロム軸受鋼からなり、ズブ焼入れによって芯部まで５８〜６５ＨＲＣの範囲に硬化処理されている。   The inner ring 5 is made of a high carbon chrome bearing steel such as SUJ2, and the other (inner side) inner rolling surface 5a is formed on the outer periphery. The inner ring 5 is hardened in the range of 58 to 65 HRC up to the core portion by quenching. Then, a caulking formed by press-fitting into the small-diameter step portion 6b of the inner race member 6 with a predetermined squeeze through an outer shell member 8 to be described later and plastically deforming the end portion of the small-diameter step portion 6b radially outward. The portion 6c is fixed in the axial direction with respect to the hub wheel 4 in a state where a predetermined bearing preload is applied. The caulking portion 6c is an unquenched portion and prevents the occurrence of microcracks or the like due to caulking. Moreover, the rolling element 3 consists of high carbon chromium bearing steels, such as SUJ2, and is hardened in the range of 58-65HRC to a core part by submerged hardening.

内殻部材７はプリプレグを経て積層された炭素繊維複合材料で構成され、具体的には、図２に模式的に示すように、炭素繊維を主とし、バインダとして合成樹脂で成形したものをクロス状に編み込んだ炭素繊維帯、すなわち、炭素繊維を主として樹脂によって成形された炭素繊維複合材料で構成され、内側軌道部材６の内周面に沿って巻き付けや貼り付け、その後、合成樹脂で固めて接合されたもので、内側軌道部材６のフランジ基部９のアウター側の側面から軸方向に延び、図示しない車輪およびブレーキロータが嵌合される円筒状のパイロット部７ａと、内側軌道部材６の小径段部６ｂの端部を閉塞する底部７ｂを備えている。なお、炭素繊維に予め合成樹脂を含浸させ、それを加熱して固めるようにしても良い。   The inner shell member 7 is composed of a carbon fiber composite material laminated through a prepreg. Specifically, as schematically shown in FIG. 2, a carbon fiber is mainly used as a binder and is molded with a synthetic resin. It is made of a carbon fiber band knitted into a shape, that is, a carbon fiber composite material in which carbon fibers are mainly formed of a resin, and is wound or pasted along the inner peripheral surface of the inner race member 6, and then hardened with a synthetic resin. A cylindrical pilot portion 7a that is joined and extends in an axial direction from the outer side surface of the flange base portion 9 of the inner race member 6 and is fitted with a wheel and a brake rotor (not shown), and a small diameter of the inner race member 6 The bottom part 7b which obstruct | occludes the edge part of the step part 6b is provided. Carbon fibers may be impregnated with a synthetic resin in advance and then heated to be hardened.

炭素繊維を結束させるための合成樹脂として、ＰＡ（ポリアミド）６６、ＰＰＡ（ポリフタルアミド）、ＰＢＴ（ポリブチレンテレフタレート）等の所謂エンジニアリングプラスチックと呼称される熱可塑性の合成樹脂を例示することができる。なお、これ以外にもポリフェニレンサルファイド（ＰＰＳ）、ポリエーテルエーテルケトン（ＰＥＥＫ）、ポリアミドイミド（ＰＡＩ）等の所謂スーパーエンジニアリングプラスチックと呼称される熱可塑性の合成樹脂、あるいは、フェノール樹脂（ＰＦ）、エポキシ樹脂（ＥＰ）、ポリイミド樹脂（ＰＩ）等の熱硬化性の合成樹脂であっても良い。また、環境負荷を軽減する生分解性の合成樹脂であっても良い。この生分解性の合成樹脂の成分としては、ポリ乳酸、ポリカプロラクトン、ポリグリコール酸、変性ポリビニルアルコール、カゼイン等を例示することができる。なお、外殻部材８は内殻部材７と同様の材質からなり、内側軌道部材６の小径段部６ｂの外周部に接合されている。   Examples of synthetic resins for binding carbon fibers include thermoplastic synthetic resins called engineering plastics such as PA (polyamide) 66, PPA (polyphthalamide), PBT (polybutylene terephthalate), and the like. . In addition to this, thermoplastic synthetic resins called super engineering plastics such as polyphenylene sulfide (PPS), polyether ether ketone (PEEK), polyamide imide (PAI), or the like, or phenol resin (PF), epoxy Thermosetting synthetic resins such as resin (EP) and polyimide resin (PI) may be used. Further, it may be a biodegradable synthetic resin that reduces the environmental load. Examples of the components of this biodegradable synthetic resin include polylactic acid, polycaprolactone, polyglycolic acid, modified polyvinyl alcohol, and casein. The outer shell member 8 is made of the same material as the inner shell member 7 and is joined to the outer peripheral portion of the small diameter step portion 6 b of the inner race member 6.

ここで、内側軌道部材６のフランジ基部９に車輪（図示せず）を取り付けるための車輪取付フランジ１２が一体に固着されている。この車輪取付フランジ１２はプリプレグを経て積層された炭素繊維複合材料で構成され、具体的には、図３（ａ）に示すように、クロス状に編み込んだ炭素繊維を予めフランジ外周の輪郭形状に成形して合成樹脂で固めた板材１２ｂ、１２ｃ、１２ｄ、１２ｅを、（ｂ）に示すように、軸方向に複数枚（ここでは、４枚）積層させたもので構成されている。なお、板材１２ｂ、１２ｃ、・・は、１ｍｍ以上に板厚で構成され、クロス状に編み込んだ当該炭素繊維は、線径５〜２０μｍを帯状に織り込んだもので、比重１．５〜１．７、引張強度が９００〜３０００Ｎ／ｍｍ２からなるものが用いられている。これにより、軽量化を図りつつ、強度面でも従来の金属部材を上まることができる。 Here, a wheel attachment flange 12 for attaching a wheel (not shown) to the flange base portion 9 of the inner race member 6 is integrally fixed. The wheel mounting flange 12 is made of a carbon fiber composite material laminated through a prepreg. Specifically, as shown in FIG. 3A, carbon fibers knitted in a cross shape are preliminarily formed into a contour shape on the outer periphery of the flange. As shown in (b), the plate members 12b, 12c, 12d, and 12e that are molded and hardened with a synthetic resin are formed by laminating a plurality of plates (here, four) in the axial direction. The plate members 12b, 12c,... Are configured with a plate thickness of 1 mm or more, and the carbon fibers knitted in a cross shape are woven in a strip shape with a wire diameter of 5 to 20 μm, and have a specific gravity of 1.5 to 1. 7. Those having a tensile strength of 900 to 3000 N / mm 2 are used. Thereby, the conventional metal member can be raised also in terms of strength while achieving weight reduction.

車輪取付フランジ１２は、図１に示すように、ハブボルト１２ａを挿通させるためのボルト孔１３が周方向等配に穿設され、このボルト孔１３に金属製のインサート部材１４が嵌着されている。このインサート部材１４は円筒状に形成され、外周に雄ねじ部を有し、その螺旋方向は、ハブボルト１２ａにハブナット（図示せず）を締結する際に緩まないように、適宜右ねじか左ねじかに選択されている。そして、このインサート部材１４にハブボルト１２ａがナール（凹凸）を介して圧入固定されている。なお、外周の雄ねじ部に代えてセレーション等の凹凸部であっても良い。   As shown in FIG. 1, the wheel mounting flange 12 has bolt holes 13 through which the hub bolts 12 a are inserted at equal intervals in the circumferential direction, and a metal insert member 14 is fitted into the bolt holes 13. . This insert member 14 is formed in a cylindrical shape and has an external thread portion on the outer periphery. The spiral direction of the insert member 14 is right or left as appropriate so as not to loosen when a hub nut (not shown) is fastened to the hub bolt 12a. Is selected. A hub bolt 12a is press-fitted and fixed to the insert member 14 via a knurl (unevenness). In addition, it may replace with the external thread part of an outer periphery, and may be uneven | corrugated | grooved parts, such as a serration.

外方部材２は、金属部材からなる外側軌道部材１５と、この外側軌道部材１５の外周面側に配置された外殻部材１６で構成されている。外側軌道部材１５は、ＳＵＪ２等の高炭素クロム軸受鋼からなるパイプ材を焼鈍した後、塑性加工によって形成されている。この外側軌道部材１５は、内周に径方向内方に突出する環状凸部１７と、この環状凸部１７の両側に複列の円弧状の外側転走面１５ａ、１５ａが一体に形成されている。   The outer member 2 includes an outer race member 15 made of a metal member, and an outer shell member 16 disposed on the outer peripheral surface side of the outer race member 15. The outer race member 15 is formed by plastic working after annealing a pipe material made of high carbon chromium bearing steel such as SUJ2. The outer race member 15 has an annular protrusion 17 projecting radially inward on the inner periphery, and double-row arc-shaped outer rolling surfaces 15a and 15a formed integrally on both sides of the annular protrusion 17. Yes.

ここで、外側転走面１５ａから環状凸部１７の肩高さを適切に確保するために、外側軌道部材１５の塑性加工時、環状凸部１７の内径がフラット形状に形成されると共に、外側軌道部材１５の中央部を凹ませて環状凹部１８が形成され、外側転走面１５ａの肩部１９に素材が充足するようにされている。これにより、肩部１９に亀裂が発生するのを防止し、かつ、旋回モーメント負荷時にボールの接触楕円が肩部１９を乗り上げてエッジロードが発生するのを防止することができ、軸受の耐久性を向上させることができる。なお、塑性加工でバリが発生する端面は加工後に旋削加工される。また、必要に応じて研削加工が施される。これら複列の外側転走面１５ａは高周波焼入れによって表面硬さを５０〜６５ＨＲＣの範囲に硬化層（図中クロスハッチングにて示す）２０が形成されている。これにより、生産性が向上して歩溜まりが良く低コスト化ができると共に、従来の鍛造、削り出しの軸受と同等の軸受精度を確保することができる。   Here, in order to appropriately secure the shoulder height of the annular convex portion 17 from the outer rolling surface 15a, the inner diameter of the annular convex portion 17 is formed in a flat shape during the plastic processing of the outer race member 15, and the outer side An annular recess 18 is formed by denting the central portion of the track member 15, and the shoulder 19 of the outer rolling surface 15a is filled with the material. Thereby, it is possible to prevent the shoulder 19 from cracking, and to prevent the contact ellipse of the ball from climbing over the shoulder 19 when a turning moment is applied, thereby preventing an edge load from being generated. Can be improved. In addition, the end surface where a burr | flash generate | occur | produces by plastic processing is turned after processing. Moreover, a grinding process is given as needed. A hardened layer (shown by cross-hatching in the figure) 20 is formed on the outer rolling surfaces 15a of these double rows by induction hardening so that the surface hardness is in the range of 50 to 65 HRC. As a result, the productivity is improved, the yield is good, the cost can be reduced, and the bearing accuracy equivalent to that of conventional forged and machined bearings can be secured.

例示した外側軌道部材１５の材質としてこれ以外にも、Ｓ５０Ｃ〜Ｓ５５Ｃや冷間圧延鋼板等の炭素鋼あるいはＳＣｒ４２０やＳＣＭ４４０等の浸炭鋼を例示することができる。この場合、浸炭焼入れによって表面硬さを５０〜６５ＨＲＣの範囲に硬化処理が施される。そして、複列の転動体３、３がこれら転走面１５ａ、６ａと転走面１５ａ、５ａ間にそれぞれ収容され、保持器２１、２１によって転動自在に保持されている。   In addition to this, carbon materials such as S50C to S55C and cold rolled steel plates, or carburized steel such as SCr420 and SCM440 can be exemplified as the material of the illustrated outer race member 15. In this case, the hardening process is performed in the range of 50 to 65 HRC by carburizing and quenching. And the double row rolling elements 3 and 3 are accommodated between these rolling surfaces 15a and 6a and rolling surfaces 15a and 5a, respectively, and are hold | maintained freely by the holder | retainers 21 and 21 so that rolling is possible.

外殻部材１６は、前述したハブ輪４の内殻部材７や外殻部材８と同様、プリプレグを経て積層された炭素繊維複合材料で構成され、アウター側の端部にシール２２が圧入されるシール嵌合部１６ａと、インナー側の端部に軸方向に延び、ナックル（図示せず）が外嵌される円筒状のパイロット部１６ｂを備えている。   Similar to the inner shell member 7 and the outer shell member 8 of the hub wheel 4 described above, the outer shell member 16 is made of a carbon fiber composite material laminated through a prepreg, and a seal 22 is press-fitted into an end portion on the outer side. A seal fitting portion 16a and a cylindrical pilot portion 16b extending in the axial direction at an end portion on the inner side and fitted with a knuckle (not shown) are provided.

ここで、外側軌道部材１５のインナー側の外周にナックルに取り付けられるための車体取付フランジ２３が一体に固着されている。この車体取付フランジ２３は、前述したハブ輪４の車輪取付フランジ１２と同様、プリプレグを経て積層された炭素繊維複合材料で構成され、固定ボルト（図示せず）を挿通させるためのボルト孔２４が周方向等配に穿設され、このボルト孔２４に金属製のインサート部材２５が嵌着されている。このインサート部材２５は円筒状に形成され、外周に雄ねじ部と、内周に雌ねじ部をそれぞれ有している。なお、外周の雄ねじ部に代えてセレーション等の凹凸部であっても良い。   Here, a vehicle body attachment flange 23 for being attached to the knuckle is integrally fixed to the outer periphery of the outer race member 15 on the inner side. Like the wheel mounting flange 12 of the hub wheel 4 described above, the vehicle body mounting flange 23 is made of a carbon fiber composite material laminated through a prepreg, and has a bolt hole 24 through which a fixing bolt (not shown) is inserted. The holes are equally spaced in the circumferential direction, and metal insert members 25 are fitted into the bolt holes 24. The insert member 25 is formed in a cylindrical shape, and has a male screw portion on the outer periphery and a female screw portion on the inner periphery. In addition, it may replace with the external thread part of an outer periphery, and may be uneven | corrugated | grooved parts, such as a serration.

また、外方部材２と内方部材１との間に形成された環状空間の両側開口部にはシール２２、２２が装着され、軸受内部に封入された潤滑グリースの漏洩と、外部から雨水やダスト等が軸受内部に侵入するのを防止している。   Further, seals 22 and 22 are attached to the opening portions on both sides of the annular space formed between the outer member 2 and the inner member 1, and leakage of the lubricating grease sealed inside the bearing, rainwater and Dust and the like are prevented from entering the bearing.

本実施形態では、内方部材１を構成するハブ輪４が、金属部材からなる内側軌道部材６と、この内側軌道部材６の内周面側に配置され、プリプレグを経て積層された炭素繊維複合材料からなる内殻部材７と、内側軌道部材６の外周面側に配置され、プリプレグを経て積層された炭素繊維複合材料からなる外殻部材８とで構成されると共に、外方部材２が、金属部材からなる外側軌道部材１５と、この外側軌道部材１５の外周面側に配置され、プリプレグを経て積層された炭素繊維複合材料からなる外殻部材１６で構成されているので、所望の強度・剛性を確保し、車輪用軸受装置の重量（２〜５ｋｇ）の略５０％の軽量化と、略１０％のコンパクト化を図りつつ、軸受寿命を確保した車輪用軸受装置を提供することができる。   In the present embodiment, the hub ring 4 constituting the inner member 1 is arranged on the inner race member 6 made of a metal member, and on the inner peripheral surface side of the inner race member 6, and is laminated through a prepreg. The outer shell 2 is composed of an inner shell member 7 made of a material and an outer shell member 8 made of a carbon fiber composite material disposed on the outer peripheral surface side of the inner race member 6 and laminated through a prepreg. Since the outer race member 15 made of a metal member and the outer shell member 16 made of a carbon fiber composite material disposed on the outer peripheral surface side of the outer race member 15 and laminated through a prepreg, the desired strength / It is possible to provide a wheel bearing device that ensures the bearing life while ensuring rigidity and reducing the weight of the wheel bearing device (about 2 to 5 kg) by about 50% and reducing the weight by about 10%. .

図４は、本発明に係る車輪用軸受装置の第２の実施形態を示す縦断面図である。なお、この第２の実施形態は、前述した実施形態（図１）と基本的にはハブ輪の構成が異なるだけで、その他同一部位同一部品あるいは同一の機能を有する部品や部位には同じ符号を付けてその詳細な説明を省略する。   FIG. 4 is a longitudinal sectional view showing a second embodiment of the wheel bearing device according to the present invention. The second embodiment basically differs from the above-described embodiment (FIG. 1) only in the configuration of the hub wheel, and the same reference numerals are given to other parts and parts having the same parts or the same functions. The detailed description is omitted.

この車輪用軸受装置は第３世代と呼称される駆動輪用であって、内方部材２６と、この内方部材２６に複列の転動体３を介して外挿された外方部材２とを備えている。内方部材２６は、ハブ輪２７と、このハブ輪２７に固定された内輪５とからなる。   This wheel bearing device is for a drive wheel called a third generation, and includes an inner member 26, and an outer member 2 externally inserted into the inner member 26 via double-row rolling elements 3. It has. The inner member 26 includes a hub ring 27 and an inner ring 5 fixed to the hub ring 27.

ハブ輪２７は、金属部材からなる内側軌道部材２８と、この内側軌道部材２８の内周面側に配置された内殻部材２９とで構成されている。内側軌道部材２８は、ＳＵＪ２等の高炭素クロム軸受鋼からなるパイプ材を焼鈍した後、塑性加工によって形成され、アウター側の端部に径方向外方に延びるフランジ基部９を一体に有し、外周に一方の内側転走面６ａと、この内側転走面６ａから軸方向に延びる円筒状の小径段部２８ａが形成されている。そして、内側転走面６ａをはじめアウター側のシール２２のランド部となる肩部１０から小径段部２８ａに亙って高周波焼入れによって表面硬さを５０〜６５ＨＲＣの範囲に硬化層（図中クロスハッチングにて示す）３０が形成されている。内輪５は、内側軌道部材２８の小径段部２８ａに所定のシメシロで圧入され、所定の軸受予圧が付与された状態でハブ輪２７に対して軸方向に固定されている。   The hub ring 27 includes an inner race member 28 made of a metal member and an inner shell member 29 disposed on the inner peripheral surface side of the inner race member 28. The inner race member 28 is integrally formed with a flange base portion 9 formed by plastic working after annealing a pipe material made of high carbon chrome bearing steel such as SUJ2, and extending radially outward at the outer end portion, One inner rolling surface 6a and a cylindrical small-diameter step portion 28a extending in the axial direction from the inner rolling surface 6a are formed on the outer periphery. Then, the surface hardness is set to a range of 50 to 65 HRC by induction quenching from the inner rolling surface 6a to the small diameter step portion 28a from the shoulder portion 10 which is the land portion of the outer seal 22 to the hardened layer (cross in the figure). 30) (shown by hatching). The inner ring 5 is press-fitted into the small-diameter step portion 28a of the inner race member 28 with a predetermined squeeze, and is fixed in the axial direction with respect to the hub ring 27 in a state where a predetermined bearing preload is applied.

内殻部材２９は、前述した内殻部材７と同様、炭素繊維を主とし、バインダとして合成樹脂で成形したものをクロス状に編み込んだ炭素繊維帯で構成され、内側軌道部材２８の内周面に沿って巻き付けや貼り付け、その後、合成樹脂で固めて接合されたもので、内側軌道部材２８のフランジ基部９のアウター側の側面から軸方向に延び、図示しない車輪およびブレーキロータが嵌合される円筒状のパイロット部７ａと、トルク伝達用のセレーション（またはスプライン）２９ａを備えている。   Similar to the inner shell member 7 described above, the inner shell member 29 is composed of a carbon fiber band mainly made of carbon fibers and woven from a synthetic resin as a binder, and is woven into a cross shape. And then joined with a synthetic resin, extending in the axial direction from the outer side surface of the flange base portion 9 of the inner race member 28, and fitted with a wheel and a brake rotor (not shown). A cylindrical pilot portion 7a and a torque transmission serration (or spline) 29a.

本実施形態では、内方部材２６を構成するハブ輪２７が、金属部材からなる内側軌道部材２８と、この内側軌道部材２８の内周面側に配置され、プリプレグを経て積層された炭素繊維複合材料からなる内殻部材２９とで構成されると共に、外方部材２が、金属部材からなる外側軌道部材１５と、この外側軌道部材１５の外周面側に配置され、プリプレグを経て積層された炭素繊維複合材料からなる外殻部材１６で構成されているので、車輪用軸受装置の軽量・コンパクト化を図りつつ、軸受寿命を確保することができる。   In the present embodiment, the hub ring 27 constituting the inner member 26 is arranged on the inner race member 28 made of a metal member, and on the inner peripheral surface side of the inner race member 28, and is laminated through a prepreg. The inner shell member 29 made of a material, and the outer member 2 is arranged on the outer raceway member 15 made of a metal member and on the outer peripheral surface side of the outer raceway member 15, and is laminated through a prepreg. Since the outer shell member 16 is made of a fiber composite material, it is possible to ensure the bearing life while reducing the weight and size of the wheel bearing device.

図５は、本発明に係る車輪用軸受装置の第３の実施形態を示す縦断面図である。なお、この第３の実施形態は、前述した第１の実施形態（図１）と基本的には軸受部の形式（外輪回転タイプ）が異なるだけで、その他同一部位同一部品あるいは同一の機能を有する部品や部位には同じ符号を付けてその詳細な説明を省略する。   FIG. 5 is a longitudinal sectional view showing a third embodiment of the wheel bearing device according to the present invention. The third embodiment is basically the same as the first embodiment (FIG. 1) described above except that the type of the bearing portion (outer ring rotation type) is the same, and the same parts and functions are the same. The parts and parts that have the same reference numerals are assigned with the same reference numerals, and detailed description thereof is omitted.

この車輪用軸受装置は第２世代と呼称される従動輪用であって、回転側部材となる外方部材３１と、この外方部材３１に複列の転動体３を介して内挿され、内方部材を構成する一対の内輪５、５とを備えている。   This wheel bearing device is for a driven wheel referred to as a second generation, and is inserted into the outer member 31 serving as a rotation side member and the outer member 31 via the double-row rolling elements 3, A pair of inner rings 5 and 5 constituting an inner member is provided.

外方部材３１は、金属部材からなる外側軌道部材３２と、この外側軌道部材３２の外周面側に配置された外殻部材３３で構成されている。外側軌道部材３２は、ＳＵＪ２等の高炭素クロム軸受鋼からなるパイプ材を焼鈍した後、塑性加工によって形成されている。この外側軌道部材３２は、アウター側の端部に径方向外方に延びるフランジ基部９を一体に有し、内周に径方向内方に突出する環状凸部１７と、この環状凸部１７の両側に複列の円弧状の外側転走面１５ａ、１５ａが一体に形成されている。   The outer member 31 includes an outer race member 32 made of a metal member and an outer shell member 33 disposed on the outer peripheral surface side of the outer race member 32. The outer race member 32 is formed by plastic working after annealing a pipe material made of high carbon chromium bearing steel such as SUJ2. The outer race member 32 integrally has a flange base 9 extending radially outward at the outer end, an annular protrusion 17 projecting radially inward on the inner periphery, and the annular protrusion 17. Double-sided arc-shaped outer rolling surfaces 15a and 15a are integrally formed on both sides.

外側転走面１５ａから環状凸部１７の肩高さを適切に確保するために、外側軌道部材３２の塑性加工時、環状凸部１７の内径がフラット形状に形成されると共に、外側軌道部材３２の中央部を凹ませて環状凹部１８が形成され、外側転走面１５ａの肩部１９に素材が充足するようにされている。なお、塑性加工でバリが発生する端面は加工後に旋削加工される。また、必要に応じて研削加工が施される。これら複列の外側転走面１５ａは高周波焼入れによって表面硬さを５０〜６５ＨＲＣの範囲に硬化層（図中クロスハッチングにて示す）２０が形成されている。そして、複列の転動体３、３がこれら外側転走面１５ａ、１５ａと内側転走面５ａ、５ａ間にそれぞれ収容され、保持器２１、２１によって転動自在に保持されている。   In order to appropriately secure the shoulder height of the annular protrusion 17 from the outer rolling surface 15a, the inner diameter of the annular protrusion 17 is formed in a flat shape when the outer race member 32 is plastically processed, and the outer race member 32 is formed. An annular recess 18 is formed by recessing the central portion of the material, and the shoulder 19 of the outer rolling surface 15a is filled with the material. In addition, the end surface where a burr | flash generate | occur | produces by plastic processing is turned after processing. Moreover, a grinding process is given as needed. A hardened layer (shown by cross-hatching in the figure) 20 is formed on the outer rolling surfaces 15a of these double rows by induction hardening so that the surface hardness is in the range of 50 to 65 HRC. The double-row rolling elements 3 and 3 are accommodated between the outer rolling surfaces 15a and 15a and the inner rolling surfaces 5a and 5a, respectively, and are held by the cages 21 and 21 so as to be freely rollable.

外殻部材３３は、前述した外郭部材１６と同様、炭素繊維を主とし、バインダとして合成樹脂で成形したものをクロス状に編み込んだ炭素繊維帯で構成され、外側軌道部材３２の外周面に沿って巻き付けや貼り付け、その後、合成樹脂で固めて接合されている。そして、外側軌道部材３２のフランジ基部９のアウター側の側面から軸方向に延びる円筒状のパイロット部７ａを備えている。   The outer shell member 33 is composed of a carbon fiber band mainly made of carbon fiber and formed of a synthetic resin as a binder and woven in a cross shape like the outer member 16 described above, and extends along the outer peripheral surface of the outer race member 32. Then, they are wound and pasted, then hardened with synthetic resin and joined. And the cylindrical pilot part 7a extended in an axial direction from the side surface of the outer side of the flange base 9 of the outer track member 32 is provided.

また、外方部材３１と一対の内輪５、５との間に形成された環状空間の両側開口部にはシール３４、３４が装着され、軸受内部に封入された潤滑グリースの漏洩と、外部から雨水やダスト等が軸受内部に侵入するのを防止している。   Further, seals 34 and 34 are attached to both side openings of the annular space formed between the outer member 31 and the pair of inner rings 5 and 5, and leakage of the lubricating grease sealed inside the bearing and from the outside Rain water and dust are prevented from entering the bearing.

本実施形態では、外方部材３１が、金属部材からなる外側軌道部材３２と、この外側軌道部材３２の外周面側に配置され、プリプレグを経て積層された炭素繊維複合材料からなる外殻部材３３とで構成されているので、車輪用軸受装置の軽量・コンパクト化を図りつつ、軸受寿命を確保することができる。   In the present embodiment, the outer member 31 is an outer race member 32 made of a metal member, and an outer shell member 33 made of a carbon fiber composite material disposed on the outer peripheral surface side of the outer race member 32 and laminated via a prepreg. Therefore, it is possible to ensure the bearing life while reducing the weight and size of the wheel bearing device.

図６は、本発明に係る車輪用軸受装置の第４の実施形態を示す縦断面図である。なお、この第４の実施形態は、前述した第１の実施形態（図１）と基本的には軸受部の構成が異なるだけで、その他同一部位同一部品あるいは同一の機能を有する部品や部位には同じ符号を付けてその詳細な説明を省略する。   FIG. 6 is a longitudinal sectional view showing a fourth embodiment of the wheel bearing device according to the present invention. The fourth embodiment is basically different from the first embodiment (FIG. 1) described above except that the configuration of the bearing portion is different, and the same parts or parts having the same functions are used. Are given the same reference numerals and their detailed description is omitted.

この車輪用軸受装置は第１世代と呼称される従動輪用であって、内方部材３５と、ナックル（図示せず）に取り付けられる外方部材３６と、これら内方部材３５と外方部材３６との間に圧入され、ナックルに対して内方部材３５を回転自在に支承する車輪用軸受３７と、を主たる構成としている。内方部材３５は、ハブ輪３８と、このハブ輪３８に圧入固定された一対の内輪５、５とからなる。また、外方部材３６は、円環状の取付部材（外殻部材）３９と、この取付部材３９に圧入固定された外輪（外側軌道部材）４０からなる。   This wheel bearing device is for a driven wheel referred to as a first generation, and includes an inner member 35, an outer member 36 attached to a knuckle (not shown), the inner member 35 and the outer member. And a wheel bearing 37 which is press-fitted between the inner member 35 and rotatably supports the inner member 35 with respect to the knuckle. The inner member 35 includes a hub ring 38 and a pair of inner rings 5 and 5 that are press-fitted and fixed to the hub ring 38. The outer member 36 includes an annular mounting member (outer shell member) 39 and an outer ring (outer raceway member) 40 press-fitted and fixed to the mounting member 39.

車輪用軸受３７は、外輪４０と、この外輪４０に内挿された一対の内輪５、５と、これら内輪５、５および外輪４０との間に収容された複列の転動体３、３とを備えている。外輪４０は、内輪５と同様、ＳＵＪ２等の高炭素クロム軸受鋼からなり、内周に一対の内輪５、５の内側転走面５ａ、５ａに対向する複列の外側転走面４０ａ、４０ａが一体に形成され、ズブ焼入れによって芯部まで５８〜６５ＨＲＣの範囲に硬化処理されている。   The wheel bearing 37 includes an outer ring 40, a pair of inner rings 5, 5 inserted in the outer ring 40, and double-row rolling elements 3, 3 accommodated between the inner rings 5, 5 and the outer ring 40. It has. The outer ring 40 is made of high carbon chrome bearing steel such as SUJ2 like the inner ring 5, and the double-row outer rolling surfaces 40a, 40a facing the inner rolling surfaces 5a, 5a of the pair of inner rings 5, 5 on the inner periphery. Are integrally formed and hardened in the range of 58 to 65 HRC up to the core part by quenching.

外輪４０と一対の内輪５、５との間に形成された環状空間の両側開口部にはシール３４、３４が装着され、軸受内部に封入された潤滑グリースの漏洩と、外部から雨水やダスト等が軸受内部に侵入するのを防止している。   Seals 34, 34 are attached to both side openings of the annular space formed between the outer ring 40 and the pair of inner rings 5, 5, leakage of lubricating grease sealed inside the bearing, rainwater, dust, etc. from the outside Is prevented from entering the inside of the bearing.

取付部材３９は、成形後の内周形状に倣う凸状の型に、炭素繊維を主とし、バインダとして合成樹脂で成形したものをクロス状に編み込んだ帯状の炭素繊維を巻き付けて円筒状に形成されると共に、クロス状に編み込んだ帯状の炭素繊維が固化された１ｍｍ以上の板材で予め車体取付フランジ４１の円周方向の輪郭形状に成形し、これを複数枚積層させて車体取付フランジ４１として固定した後、表層をクロス状に編み込んだ帯状の炭素繊維で覆い合成樹脂で固化して形成されている。そして、内周に外輪４０が嵌合される円筒状の嵌合面３９ａが形成されている。   The mounting member 39 is formed in a cylindrical shape by winding a belt-shaped carbon fiber knitted in a cross shape, which is mainly made of carbon fiber and formed of a synthetic resin as a binder, on a convex mold following the inner peripheral shape after molding. At the same time, a belt-shaped carbon fiber braided in a cross-like shape is preliminarily molded into a contour shape in the circumferential direction of the vehicle body mounting flange 41, and a plurality of these are laminated to form the vehicle body mounting flange 41. After fixing, the surface layer is covered with a band-like carbon fiber knitted in a cloth shape and solidified with a synthetic resin. And the cylindrical fitting surface 39a with which the outer ring | wheel 40 is fitted by the inner periphery is formed.

取付部材３９の嵌合面３９ａのインナー側の端部には鍔部３９ｂが一体に形成されると共に、嵌合面３９ａのアウター側の端部には環状の止め輪溝３９ｃが形成されている。そして、この止め輪溝３９ｃに装着される止め輪４２と鍔部３９ｂによって外輪４０が挟持された状態で軸方向に位置決め固定されている。   A flange 39b is integrally formed at the inner end of the fitting surface 39a of the mounting member 39, and an annular retaining ring groove 39c is formed at the outer end of the fitting surface 39a. . Then, the outer ring 40 is positioned and fixed in the axial direction in a state where the outer ring 40 is sandwiched between the retaining ring 42 and the flange 39b attached to the retaining ring groove 39c.

一方、ハブ輪３８は、金属部材からなる加締部材４３と、この加締部材４３のアウター側に配置されたハブ本体（内殻部材）４４で構成されている。加締部材４３は、Ｓ５０Ｃ〜Ｓ５５Ｃや冷間圧延鋼板等の炭素鋼から塑性加工によってカップ状に形成されている。   On the other hand, the hub wheel 38 includes a caulking member 43 made of a metal member and a hub main body (inner shell member) 44 disposed on the outer side of the caulking member 43. The caulking member 43 is formed in a cup shape by plastic working from carbon steel such as S50C to S55C or a cold rolled steel plate.

ハブ本体４４は、成形後の外周形状に倣う凹状の型に、炭素繊維を主とし、バインダとして合成樹脂で成形したものをクロス状に編み込んだ帯状の炭素繊維を巻き付けて円筒状に形成されると共に、クロス状に編み込んだ帯状の炭素繊維が固化された１ｍｍ以上の板材で予め車輪取付フランジ４５の円周方向の輪郭形状に成形し、これを複数枚積層させて車体取付フランジ４５として固定した後、表層をクロス状に編み込んだ帯状の炭素繊維で覆い、合成樹脂で固化して形成されている。そして、車輪取付フランジ４５のインナー側の基部に肩部４４ａと、この肩部４４ａを介して一対の内輪５、５が嵌合される円筒状の小径段部４４ｂが形成されると共に、車輪取付フランジ４５のアウター側の基部から軸方向に延びる円筒状のパイロット部７ａと、小径段部４４ｂの軸方向中央部に底部４４ｃが形成されている。この底部４４ｃに加締部材４３が一体にインサート成形されている。   The hub main body 44 is formed in a cylindrical shape by winding a belt-shaped carbon fiber in which a carbon fiber is mainly formed and a synthetic resin as a binder is knitted in a cross shape around a concave mold that follows the outer peripheral shape after molding. At the same time, the belt-shaped carbon fiber braided into a cross-like shape is preliminarily molded into a contour shape in the circumferential direction of the wheel mounting flange 45, and a plurality of these are laminated and fixed as the vehicle body mounting flange 45. Thereafter, the surface layer is formed by covering with a band-like carbon fiber knitted in a cross shape and solidifying with a synthetic resin. A shoulder portion 44a and a cylindrical small-diameter step portion 44b into which the pair of inner rings 5, 5 are fitted via the shoulder portion 44a are formed at the base portion on the inner side of the wheel mounting flange 45, and wheel mounting A cylindrical pilot portion 7a extending in the axial direction from the base portion on the outer side of the flange 45 and a bottom portion 44c are formed at the axially central portion of the small diameter step portion 44b. The caulking member 43 is integrally formed with the bottom portion 44c by insert molding.

一対の内輪５、５は、ハブ本体４４の小径段部４４ｂに所定のシメシロで圧入され、アウター側の内輪５をハブ本体４４の肩部４４ａに衝合させると共に、加締部材４３の端部を径方向外方に塑性変形させて形成した加締部４３ａによって所定の軸受予圧が付与された状態でハブ輪３８対して軸方向に固定されている。なお、加締部材４３は未焼入れとされ、加締加工によって微小クラック等が発生するのを防止している。   The pair of inner rings 5 and 5 are press-fitted into the small-diameter step portion 44 b of the hub main body 44 with a predetermined squeeze to abut the inner ring 5 on the outer side with the shoulder portion 44 a of the hub main body 44, and end portions of the caulking member 43. Is fixed in the axial direction with respect to the hub wheel 38 in a state in which a predetermined bearing preload is applied by a caulking portion 43a formed by plastically deforming the outer ring in the radial direction. The caulking member 43 is not quenched and prevents the occurrence of microcracks or the like due to caulking.

本実施形態では、金属部材からなる車輪用軸受３７が、プリプレグを経て積層された炭素繊維複合材料からなる取付部材３９とハブ輪３８間に圧入されているので、車輪用軸受装置の軽量化を図りつつ、標準仕様の軸受を適用することができ、低コスト化を図ることができる。また、軽量化を図るためにナックルをアルミ合金製とした場合でも、鋼製の外輪と軽合金製のナックルとの組み合せによってナックルに電食が発生するのを防止し、信頼性を向上させることができる。   In this embodiment, since the wheel bearing 37 made of a metal member is press-fitted between the mounting member 39 made of a carbon fiber composite material laminated through a prepreg and the hub wheel 38, the weight of the wheel bearing device can be reduced. A standard bearing can be applied while achieving cost reduction. Even if the knuckle is made of an aluminum alloy to reduce the weight, the combination of a steel outer ring and a light alloy knuckle prevents the occurrence of electrolytic corrosion on the knuckle and improves reliability. Can do.

図７は、本発明に係る車輪用軸受装置の第５の実施形態を示す縦断面図である。なお、この第５の実施形態は、前述した第４の実施形態（図６）と基本的にはハブ輪の構成が一部異なるだけで、その他同一部位同一部品あるいは同一の機能を有する部品や部位には同じ符号を付けてその詳細な説明を省略する。   FIG. 7 is a longitudinal sectional view showing a fifth embodiment of the wheel bearing device according to the present invention. The fifth embodiment basically differs from the above-described fourth embodiment (FIG. 6) only in part of the configuration of the hub wheel, and other parts having the same parts or the same functions. Parts are denoted by the same reference numerals and detailed description thereof is omitted.

この車輪用軸受装置は第１世代と呼称される駆動輪用であって、内方部材４６と外方部材３６、およびこれら内方部材４６と外方部材３６との間に圧入され、ナックルに対して内方部材４６を回転自在に支承する車輪用軸受３７と、を主たる構成としている。内方部材４６は、ハブ輪４７と、このハブ輪４７に圧入固定された一対の内輪５、５とからなる。   This wheel bearing device is for a drive wheel called the first generation, and is press-fitted between the inner member 46 and the outer member 36, and between the inner member 46 and the outer member 36, and is attached to the knuckle. On the other hand, a wheel bearing 37 that rotatably supports the inner member 46 is mainly configured. The inner member 46 includes a hub ring 47 and a pair of inner rings 5 and 5 that are press-fitted and fixed to the hub ring 47.

ハブ輪４７は、前述したハブ本体４４と同様、成形後の外周形状に倣う凹状の型に、炭素繊維を主とし、バインダとして合成樹脂で成形したものをクロス状に編み込んだ帯状の炭素繊維を巻き付けて円筒状に形成されると共に、クロス状に編み込んだ帯状の炭素繊維が固化された１ｍｍ以上の板材で予め車輪取付フランジ４５の円周方向の輪郭形状に成形し、これを複数枚積層させて車体取付フランジ４５として固定した後、表層をクロス状に編み込んだ帯状の炭素繊維で覆い合成樹脂で固化して形成されている。そして、車輪取付フランジ４５のインナー側の基部に肩部４４ａと、この肩部４４ａを介して一対の内輪５、５が嵌合される円筒状の小径段部４４ｂが形成されると共に、車輪取付フランジ４５のアウター側の基部から軸方向に延びる円筒状のパイロット部７ａと、内周にトルク伝達用のセレーション（またはスプライン）２９ａが形成されている。   The hub wheel 47 is similar to the hub main body 44 described above, and is formed of a carbon fiber in a concave mold following the outer peripheral shape after molding, and a band-shaped carbon fiber obtained by knitting a synthetic resin as a binder into a cross shape. It is formed into a cylindrical shape by wrapping, and it is formed in advance in the circumferential shape of the wheel mounting flange 45 with a plate material of 1 mm or more obtained by solidifying a band-like carbon fiber knitted into a cross shape, and a plurality of these are laminated. After fixing as the vehicle body mounting flange 45, the surface layer is covered with a band-like carbon fiber knitted in a cross shape and solidified with a synthetic resin. A shoulder portion 44a and a cylindrical small-diameter step portion 44b into which the pair of inner rings 5, 5 are fitted via the shoulder portion 44a are formed at the base portion on the inner side of the wheel mounting flange 45, and wheel mounting A cylindrical pilot portion 7a extending in the axial direction from a base portion on the outer side of the flange 45, and a serration (or spline) 29a for torque transmission are formed on the inner periphery.

一対の内輪５、５は、ハブ輪４７の小径段部４４ｂに所定のシメシロで圧入され、アウター側の内輪５をハブ本体４４の肩部４４ａに衝合させた状態で軸方向に固定されている。   The pair of inner rings 5 and 5 is press-fitted into the small-diameter step portion 44 b of the hub wheel 47 with a predetermined scissors, and is fixed in the axial direction with the inner ring 5 on the outer side abutting against the shoulder portion 44 a of the hub body 44. Yes.

本実施形態では、前述した実施形態と同様、金属部材からなる車輪用軸受３７が、プリプレグを経て積層された炭素繊維複合材料からなる取付部材３９とハブ輪４７間に圧入されているので、車輪用軸受装置の軽量化を図りつつ、標準仕様の軸受を適用することができ、低コスト化を図ることができる。   In the present embodiment, the wheel bearing 37 made of a metal member is press-fitted between the mounting member 39 made of a carbon fiber composite material laminated through a prepreg and the hub wheel 47, as in the above-described embodiment. Standard bearings can be applied while reducing the weight of the bearing device for use, and the cost can be reduced.

図８は、本発明に係る車輪用軸受装置の第６の実施形態を示す縦断面図である。なお、この第６の実施形態は、前述した第４の実施形態（図６）と基本的には取付部材の構成が一部異なるだけで、その他同一部位同一部品あるいは同一の機能を有する部品や部位には同じ符号を付けてその詳細な説明を省略する。   FIG. 8 is a longitudinal sectional view showing a sixth embodiment of the wheel bearing device according to the present invention. The sixth embodiment is basically different from the above-described fourth embodiment (FIG. 6) only in part of the configuration of the mounting member, and other parts having the same parts or the same functions. Parts are denoted by the same reference numerals and detailed description thereof is omitted.

この車輪用軸受装置は第１世代と呼称される従動輪用であって、内方部材３５と、ナックル（図示せず）に取り付けられる外方部材４８と、これら内方部材３５と外方部材４８との間に圧入され、ナックルに対して内方部材３５を回転自在に支承する車輪用軸受３７と、を主たる構成としている。外方部材４８は、円環状の取付部材（外殻部材）４９と、この取付部材４９に圧入固定された外輪４０からなる。   This wheel bearing device is for a driven wheel referred to as a first generation, and includes an inner member 35, an outer member 48 attached to a knuckle (not shown), and these inner member 35 and outer member. A wheel bearing 37 that is press-fitted between the inner member 35 and the inner member 35 is rotatably supported with respect to the knuckle. The outer member 48 includes an annular mounting member (outer shell member) 49 and an outer ring 40 press-fitted and fixed to the mounting member 49.

取付部材４９は、前述した取付部材３９と同様、成形後の内周形状に倣う凸状の型に、炭素繊維を主とし、バインダとして合成樹脂で成形したものをクロス状に編み込んだ帯状の炭素繊維を巻き付けて円筒状に形成されると共に、クロス状に編み込んだ帯状の炭素繊維が固化された１ｍｍ以上の板材で予め車体取付フランジ４１の円周方向の輪郭形状に成形し、これを複数枚積層させて車体取付フランジ４１として固定した後、表層をクロス状に編み込んだ帯状の炭素繊維で覆い合成樹脂で固化して形成されている。そして、内周に外輪４０が嵌合される円筒状の嵌合面４９ａが形成されている。   As with the mounting member 39 described above, the mounting member 49 is a belt-shaped carbon obtained by knitting a carbon fiber as a binder and molding a synthetic resin as a binder into a convex shape following the inner peripheral shape after molding. It is formed into a cylindrical shape by wrapping the fibers, and is formed into a contour shape in the circumferential direction of the body mounting flange 41 in advance by using a plate material of 1 mm or more obtained by solidifying band-like carbon fibers knitted into a cross shape, and a plurality of these After being laminated and fixed as the vehicle body mounting flange 41, the surface layer is covered with a band-like carbon fiber knitted in a cross shape and solidified with a synthetic resin. A cylindrical fitting surface 49a on which the outer ring 40 is fitted is formed on the inner periphery.

取付部材４９の嵌合面４９ａのインナー側の端部には肩部４９ｂが一体に形成されると共に、嵌合面４９ａのアウター側の端部には環状の止め輪溝４９ｃが形成されている。そして、この止め輪溝４９ｃに装着される止め輪５０と肩部４９ｂによって外輪４０が挟持された状態で軸方向に位置決め固定されている。本実施形態では、取付部材４９の肩部４９ｂから径方向内方に延び、内方部材３５のインナー側の端部を閉塞する底部４９ｄが形成されている。   A shoulder 49b is integrally formed at the inner end of the fitting surface 49a of the mounting member 49, and an annular retaining ring groove 49c is formed at the outer end of the fitting surface 49a. . The outer ring 40 is positioned and fixed in the axial direction while the outer ring 40 is sandwiched between the retaining ring 50 and the shoulder portion 49b attached to the retaining ring groove 49c. In the present embodiment, a bottom portion 49 d that extends radially inward from the shoulder portion 49 b of the attachment member 49 and closes the inner side end of the inner member 35 is formed.

なお、止め輪５０は、外輪４０のアウター側の外周端部に装着され、外径側に突出する複数の爪５０ａを弾性変形させながらこの外輪４０を取付部材４９に嵌合していくことにより、爪５０ａは取付部材４９に形成されたテーパ状の止め輪溝４９ｃの位置で弾性復元し、止め輪溝４９ｃの壁面に弾性接触させている。これにより、組立作業性が向上するだけでなく、取付部材４９と外輪４０との軸方向のすきまを詰めることができ、ガタなく車輪用軸受３７を位置決め固定することができる。   The retaining ring 50 is attached to the outer peripheral end portion of the outer ring 40 on the outer side, and the outer ring 40 is fitted to the mounting member 49 while elastically deforming a plurality of claws 50a protruding to the outer diameter side. The claw 50a is elastically restored at the position of a tapered retaining ring groove 49c formed in the mounting member 49, and is elastically brought into contact with the wall surface of the retaining ring groove 49c. Thus, not only the assembly workability is improved, but also the axial clearance between the mounting member 49 and the outer ring 40 can be reduced, and the wheel bearing 37 can be positioned and fixed without play.

本実施形態では、前述した実施形態と同様、金属部材からなる車輪用軸受３７が、プリプレグを経て積層された炭素繊維複合材料からなる取付部材４９とハブ輪３８間に圧入されているので、車輪用軸受装置の軽量化を図りつつ、低コスト化を図ることができると共に、底部４９ｄを一体に備えた取付部材４９によって軸受部の密封性を向上させることができる。   In the present embodiment, the wheel bearing 37 made of a metal member is press-fitted between the mounting member 49 made of a carbon fiber composite material laminated through a prepreg and the hub wheel 38, as in the above-described embodiment. The weight of the bearing device can be reduced, the cost can be reduced, and the sealing performance of the bearing portion can be improved by the mounting member 49 integrally provided with the bottom portion 49d.

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

本発明に係る車輪用軸受装置は、駆動輪用、従動輪用に拘わらず、第１乃至第３世代構造の車輪用軸受装置に適用することができる。   The wheel bearing device according to the present invention can be applied to a wheel bearing device having a first to third generation structure regardless of whether it is for driving wheels or driven wheels.

１、２６、３５、４６ 内方部材
２、３１、３６、４８ 外方部材
３ 転動体
４、２７、３８、４７ ハブ輪
５ 内輪
５ａ、６ａ 内側転走面
６、２８ 内側軌道部材
６ｂ、２８ａ、４４ｂ 小径段部
６ｃ、４３ａ 加締部
７、２９ 内殻部材
７ａ、１６ｂ パイロット部
７ｂ、４４ｃ、４９ｄ 底部
８、１６、３３ 外殻部材
９ フランジ基部
１０、１９、４４ａ、４９ｂ 肩部
１１、２０、３０ 硬化層
１２、４５ 車輪取付フランジ
１２ａ ハブボルト
１３、２４ ボルト孔
１４、２５ インサート部材
１５、３２ 外側軌道部材
１５ａ、４０ａ 外側転走面
１６ａ シール嵌合部
１７ 環状凸部
１８ 環状凹部
２１ 保持器
２２、３４ シール
２３、４１ 車体取付フランジ
２９ａ セレーション
３７ 車輪用軸受
３９、４９ 取付部材
３９ａ、４９ａ 嵌合面
３９ｂ 鍔部
３９ｃ、４９ｃ 止め輪溝
４０ 外輪
４２、５０ 止め輪
４３ 加締部材
４４ ハブ本体
５０ａ 爪
５１ 車輪用軸受装置
５２ 内方部材
５３ 外方部材
５４ ボール
５５ ハブ輪
５５ａ 車輪取付フランジ
５５ｂ、５６ａ 内側転走面
５５ｃ 小径段部
５６ 内輪
５７ 取付部材
５８ 外輪
５８ａ 外側転走面
５８ｂ 厚肉部
５９ 車体取付フランジ
５９ａ 基部
５９ｂ ナックル取付部
６０ 挿通孔
６１ 雌ねじ穴
６２ 固定部材
６３ ハブ輪
６４ 外方部材
６５ 車輪取付フランジ
６５ａ、６６ａ フランジ部
６６ 車体取付フランジ
６７ 固定ボルト 1, 26, 35, 46 Inner member 2, 31, 36, 48 Outer member 3 Rolling elements 4, 27, 38, 47 Hub wheel 5 Inner ring 5a, 6a Inner rolling surface 6, 28 Inner track member 6b, 28a 44b Small diameter step portion 6c, 43a Clamping portion 7, 29 Inner shell member 7a, 16b Pilot portion 7b, 44c, 49d Bottom portion 8, 16, 33 Outer shell member 9 Flange base portion 10, 19, 44a, 49b Shoulder portion 11, 20, 30 Hardened layer 12, 45 Wheel mounting flange 12a Hub bolt 13, 24 Bolt hole 14, 25 Insert member 15, 32 Outer race member 15a, 40a Outer rolling surface 16a Seal fitting part 17 Annular convex part 18 Annular concave part 21 Holding 22 and 34 Seals 23 and 41 Car body mounting flange 29a Serration 37 Wheel bearings 39 and 49 Mounting members 39a and 49a Fitting surface 39b Gutter 39c 49c Retaining ring groove 40 Outer ring 42, 50 Retaining ring 43 Caulking member 44 Hub body 50a Claw 51 Wheel bearing device 52 Inner member 53 Outer member 54 Ball 55 Hub wheel 55a Wheel mounting flange 55b, 56a Inner rolling surface 55c Small diameter step part 56 Inner ring 57 Mounting member 58 Outer ring 58a Outer rolling surface 58b Thick part 59 Car body mounting flange 59a Base part 59b Knuckle mounting part 60 Insertion hole 61 Female screw hole 62 Fixing member 63 Hub wheel 64 Outer member 65 Wheel mounting flange 65a , 66a Flange portion 66 Car body mounting flange 67 Fixing bolt

Claims (10)

内周に複列の外側転走面が一体に形成された外方部材と、
外周に前記複列の外側転走面に対向する複列の内側転走面が形成された内方部材と、
この内方部材と前記外方部材の両転走面間に保持器を介して転動自在に収容された複列の転動体と、
前記外方部材と内方部材の間に形成された環状空間の開口部に装着されたシールと、を備え、
前記外方部材と内方部材のうち回転側となる部材のアウター側の端部に車輪を取り付けるための車輪取付フランジが一体に形成された車輪用軸受装置において、
前記外方部材が、前記転走面が形成された軌道部材と、前記シールが摺動する部位が金属部材からなり、その他の部位が、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料で構成され、
前記内方部材が、ハブ輪と、このハブ輪に固定された少なくとも一つの内輪からなり、前記ハブ輪が前記車輪取付フランジを一体に有し、成形後の外周形状に倣う凹状の型に、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料を巻き付けて円筒状に形成され、クロス状に編み込んだ炭素繊維で覆い合成樹脂で固化され、前記車輪取付フランジのインナー側の肩部を介して軸方向に延びる円筒状の小径段部を備えると共に、この小径段部に前記内輪が圧入されていることを特徴とする車輪用軸受装置。 An outer member in which a double row outer rolling surface is integrally formed on the inner periphery;
An inner member in which a double row inner rolling surface facing the outer row rolling surface of the double row is formed on the outer periphery;
A double row rolling element housed between the rolling surfaces of the inner member and the outer member so as to be freely rollable via a cage;
A seal attached to an opening of an annular space formed between the outer member and the inner member,
In the wheel bearing device in which the wheel mounting flange for mounting the wheel to the outer end of the outer member and the inner member on the outer side is integrally formed,
It said outer member comprises a track member, wherein the rolling run surface is formed, the site where the seal slides are made of a metal member, and other sites, mainly carbon fiber, and a synthetic resin as a binder Composed of carbon fiber composite material ,
The inner member includes a hub wheel and at least one inner ring fixed to the hub wheel, the hub wheel integrally including the wheel mounting flange, and a concave mold following the outer peripheral shape after molding. A carbon fiber composite material mainly made of carbon fiber and a carbon fiber composite material molded with a synthetic resin as a binder is wound, formed into a cylindrical shape, covered with a carbon fiber knitted in a cross shape, solidified with a synthetic resin, and the shoulder on the inner side of the wheel mounting flange A wheel bearing device comprising a cylindrical small-diameter step portion extending in the axial direction through a portion, and the inner ring being press-fitted into the small-diameter step portion . 前記外方部材の軌道部材が炭素鋼から塑性加工によって形成されている請求項１に記載の車輪用軸受装置。   The wheel bearing device according to claim 1, wherein the outer race member is formed of carbon steel by plastic working. 前記内方部材が、前記軌道部材となるハブ輪と、このハブ輪に固定された内輪を備え、前記ハブ輪が炭素鋼から塑性加工によって形成され、アウター側の端部に径方向外方に延びるフランジ基部を一体に有し、外周にアウター側の内側転走面と、この内側転走面から軸方向に延び、外周にインナー側の内側転走面が形成された内輪が圧入される円筒状の小径段部が形成されている請求項１に記載の車輪用軸受装置。   The inner member includes a hub ring serving as the raceway member and an inner ring fixed to the hub ring. The hub ring is formed of carbon steel by plastic working, and radially outward at an outer end portion. A cylinder that has a flange base that extends integrally, an outer ring-side inner rolling surface on the outer periphery, and an inner ring that extends in the axial direction from the inner rolling surface and has an inner-side inner rolling surface formed on the outer periphery. The wheel bearing device according to claim 1, wherein a shaped small-diameter step portion is formed. 前記ハブ輪の小径段部のインナー側の端部を径方向外方に塑性変形させて形成した加締部によって所定の軸受予圧が付与された状態で当該ハブ輪に対して前記内輪が軸方向に固定されている請求項３に記載の車輪用軸受装置。   The inner ring is axially oriented with respect to the hub wheel in a state where a predetermined bearing preload is applied by a caulking portion formed by plastically deforming the inner side end of the small-diameter step portion of the hub ring radially outward. The wheel bearing device according to claim 3, wherein the wheel bearing device is fixed to the wheel. 前記外方部材が、前記軌道部材の外周面側に配置され、外周にナックルに取り付けられるための車体取付フランジを一体に有する外殻部材を備え、この外殻部材が、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料で構成され、前記軌道部材の外周面に沿って巻き付けや貼り付けて合成樹脂で固めて接合された炭素繊維を主として樹脂によって成形された炭素繊維複合材料で構成されている請求項１または２に記載の車輪用軸受装置。   The outer member is disposed on the outer peripheral surface side of the track member, and includes an outer shell member integrally including a vehicle body mounting flange for being attached to a knuckle on the outer periphery, the outer shell member mainly including carbon fiber, A carbon fiber composite material, which is formed of a carbon fiber composite material formed of a synthetic resin as a binder, and is mainly formed of a resin by bonding the carbon fiber wound and pasted along the outer peripheral surface of the raceway member and solidified with a synthetic resin. The wheel bearing device according to claim 1 or 2, comprising the following. 前記内方部材が、前記軌道部材の内周面側に配置され、前記車輪取付フランジを一体に有する内殻部材を備え、この内殻部材が、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料で構成され、前記軌道部材の内周面に沿って巻き付けや貼り付けて合成樹脂で固めて接合された炭素繊維を主として樹脂によって成形された炭素繊維複合材料で構成されている請求項１または３に記載の車輪用軸受装置。   The inner member is disposed on the inner peripheral surface side of the track member, and includes an inner shell member that integrally includes the wheel mounting flange. The inner shell member is mainly made of carbon fiber, and is molded from a synthetic resin as a binder. Made of carbon fiber composite material, and made of carbon fiber composite material mainly formed of resin, which is formed by wrapping or pasting along the inner peripheral surface of the raceway member and solidifying and bonding with a synthetic resin. The wheel bearing device according to claim 1 or 3. 前記ハブ輪が、そのインナー側の端部にインサート成形され、炭素鋼から塑性加工によってカップ状に形成された加締部材を備え、この加締部材のインナー側の端部を径方向外方に塑性変形させて形成した加締部によって所定の軸受予圧が付与された状態で当該ハブ輪に対して前記内輪が軸方向に固定されている請求項１に記載の車輪用軸受装置。 The hub ring includes a crimping member that is insert-molded at an end portion on the inner side and is formed into a cup shape from carbon steel by plastic working, and the end portion on the inner side of the crimping member is radially outward. The wheel bearing device according to claim 1 , wherein the inner ring is fixed in the axial direction with respect to the hub wheel in a state where a predetermined bearing preload is applied by a caulking portion formed by plastic deformation. 前記外方部材が、前記軌道部材の外周面側に配置され、外周にナックルに取り付けられるための車体取付フランジが固定された円環状の取付部材と、炭素鋼からなる外輪を備え、前記取付部材が、成形後の内周形状に倣う凸状の型に、炭素繊維を主とし、バインダとして合成樹脂で成形した炭素繊維複合材料を巻き付けて円筒状に形成され、クロス状に編み込んだ炭素繊維で覆い合成樹脂で固化され、内周に円筒状の嵌合面と、この嵌合面のインナー側の端部に鍔部と、アウター側の端部に環状の止め輪溝が一体に形成されると共に、当該嵌合面に前記外輪が圧入され、前記止め輪溝に装着される止め輪と前記鍔部によって軸方向に位置決め固定されている請求項１に記載の車輪用軸受装置。 The outer member has said is disposed on the outer peripheral surface of the raceway member comprises an annular mounting member vehicle body mounting flange for being mounted to the knuckle is fixed to the outer periphery, the outer ring made of carbon steel, the mounting Carbon fiber is formed into a cylindrical shape by wrapping a carbon fiber composite material mainly composed of carbon fiber and molded with synthetic resin as a binder around a convex mold that follows the inner peripheral shape after molding It is solidified with synthetic resin, and has a cylindrical fitting surface on the inner periphery, a flange on the inner end of this fitting surface, and an annular retaining ring groove on the outer end. The wheel bearing device according to claim 1, wherein the outer ring is press-fitted into the fitting surface, and is positioned and fixed in the axial direction by a retaining ring mounted in the retaining ring groove and the flange portion. 前記取付部材の嵌合面のインナー側の端部に肩部と、この肩部から径方向内方に延び、前記内方部材のインナー側の端部を閉塞する底部が一体に形成され、前記止め輪と肩部によって前記外輪が軸方向に位置決め固定されている請求項８に記載の車輪用軸受装置。 A shoulder on the inner side end of the fitting surface of the mounting member and a bottom that extends radially inward from the shoulder and closes the inner side end of the inner member are integrally formed, The wheel bearing device according to claim 8 , wherein the outer ring is positioned and fixed in the axial direction by a retaining ring and a shoulder portion. 前記外方部材が、前記軌道部材の外周面側に配置され、外周にナックルに取り付けられるための車体取付フランジを備え、この車体取付フランジと前記車輪取付フランジが、炭素繊維を主とし、バインダとして合成樹脂で成形したものをクロス状に編み込んだ炭素繊維を予めフランジ外周の輪郭形状に成形して合成樹脂で固めた板材を軸方向に複数枚積層させた炭素繊維を主として樹脂によって成形された炭素繊維複合材料で構成されている請求項１に記載の車輪用軸受装置。 The outer member is disposed on the outer peripheral surface side of the track member, and includes a vehicle body mounting flange for being attached to a knuckle on the outer periphery. The vehicle body mounting flange and the wheel mounting flange are mainly made of carbon fiber and used as a binder. Carbon fiber, which is mainly made of resin, is a carbon fiber made of synthetic resin molded into a cross shape in a cross shape. The wheel bearing device according to claim 1, which is made of a fiber composite material.
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