JP4936712B2 - Wheel bearing device - Google Patents

Wheel bearing device Download PDF

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JP4936712B2
JP4936712B2 JP2005343083A JP2005343083A JP4936712B2 JP 4936712 B2 JP4936712 B2 JP 4936712B2 JP 2005343083 A JP2005343083 A JP 2005343083A JP 2005343083 A JP2005343083 A JP 2005343083A JP 4936712 B2 JP4936712 B2 JP 4936712B2
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wheel
mounting flange
hub
bolt insertion
bearing device
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JP2007145203A (en
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清武 柴田
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NTN Corp
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NTN 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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

Description

本発明は、自動車等の車輪を懸架装置に対して回転自在に支承する車輪用軸受装置、特に、装置の軽量・コンパクト化と共に、低コスト化を図った車輪用軸受装置に関するものである。   The present invention relates to a wheel bearing device that rotatably supports a wheel of an automobile or the like with respect to a suspension device, and more particularly, to a wheel bearing device that achieves a reduction in cost while reducing the weight and size of the device.

近年、省資源あるいは公害等の面から燃費向上に対する要求は厳しいものがある。自動車部品において、中でも車輪軸受装置の軽量化はこうした要求に応える要因として注目され、強く望まれて久しい。特に、自動車等の車両の中でも軽四輪あるいはスモールカーをはじめとした軽車両においては、この軽量化に対する要求は益々増大してきている。従来から軽量化を図った車輪用軸受装置に関する提案は種々のものがあるが、それと共に低コスト化を図ることも重要な要因となっている。   In recent years, demands for improving fuel efficiency have been severe from the viewpoint of resource saving or pollution. In automobile parts, the weight reduction of wheel bearing devices has been attracting attention as a factor to meet such demands and has been strongly desired for a long time. In particular, light vehicles such as light four-wheel vehicles or small cars among vehicles such as automobiles have been increasingly demanded for weight reduction. There have been various proposals related to wheel bearing devices that have been reduced in weight, and at the same time, cost reduction is also an important factor.

図７は、自動車に用いられ、軽量化を図った車輪用軸受装置の一例である。この車輪用軸受装置は駆動輪側に使用される代表的な構造で、ハブ輪５１と複列の転がり軸受５２とがユニット化して構成されている。   FIG. 7 shows an example of a wheel bearing device that is used in an automobile and is reduced in weight. This wheel bearing device has a typical structure used on the drive wheel side, and includes a hub wheel 51 and a double row rolling bearing 52 formed as a unit.

車輪用軸受装置のハブ輪５１は鍛造により形成されて中空構造をなし、図示しない車輪を取り付けるための車輪取付フランジ５３を一体に有し、その外周に複列の転がり軸受５２の一方の内側転走面５１ａと、この内側転走面５１ａから軸方向に延びる円筒状の小径段部５１ｂが形成され、内周にトルク伝達用のスプライン５４が形成されている。   The hub wheel 51 of the wheel bearing device is formed by forging to form a hollow structure, and integrally has a wheel mounting flange 53 for mounting a wheel (not shown), and one inward rolling of the double row rolling bearing 52 on the outer periphery thereof. A running surface 51a and a cylindrical small diameter step portion 51b extending in the axial direction from the inner rolling surface 51a are formed, and a torque transmission spline 54 is formed on the inner periphery.

前記小径段部５１ｂには、複列の転がり軸受５２の他方の内側転走面５５ａが外周に形成された別体の内輪５５が圧入されている。そして、小径段部５１ｂの端部を径方向外方に塑性変形させて加締部５６が形成され、この加締部５６によって内輪５５がハブ輪５１に対して軸方向に固定されている。   A separate inner ring 55 in which the other inner rolling surface 55a of the double row rolling bearing 52 is formed on the outer periphery is press-fitted into the small diameter step portion 51b. The end portion of the small diameter step portion 51 b is plastically deformed radially outward to form a crimped portion 56, and the inner ring 55 is fixed to the hub wheel 51 in the axial direction by the crimped portion 56.

一方、複列の転がり軸受５２を構成する外方部材５７は、懸架装置を構成するナックル５８に固定するための車体取付フランジ５７ｂを一体に有し、内周に前記内側転走面５１ａ、５５ａに対向する複列の外側転走面５７ａ、５７ａが形成されている。このように、複列の転がり軸受５２は、ハブ輪５１と内輪５５と外方部材５７、および両転走面５１ａ、５７ａ、５５ａ、５７ａ間に転動自在に収容された複列のボール５９、５９を備えている。   On the other hand, the outer member 57 constituting the double-row rolling bearing 52 integrally has a vehicle body mounting flange 57b for fixing to the knuckle 58 constituting the suspension device, and the inner rolling surfaces 51a, 55a are arranged on the inner periphery. Double row outer rolling surfaces 57a and 57a are formed opposite to each other. As described above, the double row rolling bearing 52 includes the hub wheel 51, the inner ring 55, the outer member 57, and the double row balls 59 accommodated so as to roll between the rolling surfaces 51a, 57a, 55a, 57a. , 59.

ハブ輪５１において、車輪取付フランジ５３の円周４箇所等配にハブボルト５３ａが植設され、ブレーキロータ６０および車輪が締結される。このハブ輪５１は、図８に示すように、車輪取付フランジ５３に、ハブボルト５３ａが固定されるボルト挿通孔６１が形成され、このボルト挿通孔６１の周辺を避けて、各ボルト挿通孔６１間において、車輪取付フランジ５３の外周にＲ形状の切欠き部６２が形成されている。   In the hub wheel 51, hub bolts 53a are implanted at four equal locations around the wheel mounting flange 53, and the brake rotor 60 and the wheel are fastened. As shown in FIG. 8, the hub wheel 51 has a bolt insertion hole 61 in which a hub bolt 53 a is fixed to the wheel mounting flange 53, and avoids the periphery of the bolt insertion hole 61. , An R-shaped notch 62 is formed on the outer periphery of the wheel mounting flange 53.

切欠き部６２は、ボルト挿通孔６１のピッチ円直径Ａより内径側で、かつ隣接するボルト挿通孔６１の中心を結ぶ弦Ｂにその最深部６２ａが近接するように形成されている。さらに、車輪取付フランジ５３は、各ボルト挿通孔６１の外周近傍の肉厚が薄くされた薄肉部６３が形成されると共に、各ボルト挿通孔６１を含んで内周側の肉厚は薄くせず、充分な曲げ剛性が得られるように通常の厚肉部６４とされている。これにより、軽量化を図りながらも、車輪取付フランジ５３の曲げ剛性が低下するのを防止している。
特開２００３−９４９０５号公報 The notch 62 is formed so that the deepest portion 62 a is close to the string B connecting the center of the adjacent bolt insertion hole 61 on the inner diameter side of the pitch circle diameter A of the bolt insertion hole 61. Further, the wheel mounting flange 53 is formed with a thin portion 63 in which the thickness in the vicinity of the outer periphery of each bolt insertion hole 61 is reduced, and the inner peripheral side including the bolt insertion holes 61 is not reduced in thickness. The normal thick portion 64 is used so that sufficient bending rigidity can be obtained. This prevents a reduction in the bending rigidity of the wheel mounting flange 53 while reducing the weight.
JP 2003-94905 A

このような従来の車輪用軸受装置では、軽量化を狙って車輪取付フランジ５３のハブボルト５３ａ間の外周部分を排除して花形形状に形成されると共に、ハブ輪５１のスリム化を図りつつ車輪取付フランジ５３の曲げ剛性が低下するのを防止している。また、図９（ａ）に示すように、ハブ輪５１の鍛造工程では、車輪取付フランジ５３が平坦に形成できるような金型構造になっている。すなわち、車輪取付フランジ５３の外周まで鍛造素材が流動し易いよう、上型６５と下型６６とが、車輪取付フランジ５３の側面６７の位置で僅かな空洞部を介して衝合するように構成されている。その結果、（ｂ）に示すように、車輪取付フランジ５３の外周にバリ６８が発生する。そして、（ｃ）に示すように、鍛造の最終工程にこのバリ６８が型抜き除去されている。   In such a conventional wheel bearing device, the outer peripheral portion between the hub bolts 53a of the wheel mounting flange 53 is eliminated to reduce the weight, and the wheel mounting is performed while the hub wheel 51 is slimmed. The bending rigidity of the flange 53 is prevented from being lowered. Moreover, as shown to Fig.9 (a), in the forge process of the hub wheel 51, it has a metal mold | die structure which can form the wheel mounting flange 53 flatly. That is, the upper die 65 and the lower die 66 are configured to abut each other through a slight cavity at the side surface 67 of the wheel mounting flange 53 so that the forging material easily flows to the outer periphery of the wheel mounting flange 53. Has been. As a result, as shown in (b), burrs 68 are generated on the outer periphery of the wheel mounting flange 53. Then, as shown in (c), the burrs 68 are removed by die cutting in the final process of forging.

然しながら、車輪取付フランジ５３の側面６７を旋削加工する際、側面６７の外周縁にバリが発生して側面６７側に捲くれ込まないように、別途側面６７の外周縁のバリを除去する必要があった。さらに、車輪取付フランジ５３が花形形状であるが故に、このバリ６８を除去する旋削加工が断続加工となり、工程増しに加えサイクルタイムが長くなって製造コストが高騰する要因となっていた。   However, when turning the side surface 67 of the wheel mounting flange 53, it is necessary to separately remove the burr on the outer peripheral edge of the side surface 67 so that a burr is generated on the outer peripheral edge of the side surface 67 and does not creep into the side surface 67 side. there were. Further, since the wheel mounting flange 53 has a flower shape, the turning process for removing the burr 68 is an intermittent process, which increases the cycle time and increases the manufacturing cost.

本発明は、このような従来の問題に鑑みてなされたもので、強度・剛性を確保しつつ軽量・コンパクト化を図ると共に、低コスト化を図った車輪用軸受装置を提供することを目的とする。   The present invention has been made in view of such a conventional problem, and an object thereof is to provide a wheel bearing device that achieves light weight and compactness while ensuring strength and rigidity and at the same time lowers the cost. To do.

係る目的を達成すべく、本発明のうち請求項１に記載の発明は、内周に複列の外側転走面が形成された外方部材と、アウトボード側の端部に車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪とからなり、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、前記両転走面間に転動自在に収容された複列の転動体とを備えた車輪用軸受装置において、前記車輪取付フランジの外周縁に、鍛造加工により所定の面取り部が形成され、この面取り部が当該車輪取付フランジの外周の両端部に形成されている。
In order to achieve such an object, the invention described in claim 1 of the present invention includes an outer member having a double row outer raceway formed on the inner periphery, and a wheel mounting flange at an end on the outboard side. A hub wheel integrally formed and having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub wheel, and outer rolling of the double row on the outer periphery. In a wheel bearing device comprising: an inner member in which a double-row inner rolling surface facing the surface is formed; and a double-row rolling element that is slidably accommodated between the both rolling surfaces; A predetermined chamfered portion is formed on the outer peripheral edge of the wheel mounting flange by forging, and the chamfered portions are formed at both ends of the outer periphery of the wheel mounting flange .

このように、一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するハブ輪を備えた車輪用軸受装置において、車輪取付フランジの外周縁に、鍛造加工により所定の面取り部が形成され、この面取り部が当該車輪取付フランジの外周の両端部に形成されているので、車輪取付フランジのアウター側の側面を旋削工程で所望の形状・寸法に形成しても、側面の外周縁にバリが発生して側面側に捲くれ込むことはなく、旋削工程におけるバリ除去が不要となる。したがって、強度・剛性を確保しつつ軽量・コンパクト化を図ると共に、工数削減によって低コスト化を図ることができる。
Thus, in the wheel bearing apparatus provided with a hub wheel integrally having a wheel mounting flange for mounting a wheel at one end, the outer periphery of the wheel mounting flange, a predetermined chamfered portion is formed by forging, the Since the chamfered parts are formed at both ends of the outer periphery of the wheel mounting flange, even if the outer side surface of the wheel mounting flange is formed into the desired shape and dimensions in the turning process, burrs are generated on the outer peripheral edge of the side surface. As a result, no burrs are removed in the turning process. Therefore, while ensuring strength and rigidity, it is possible to reduce the cost by reducing the number of steps while reducing the weight and size.

好ましくは、請求項２に記載の発明のように、前記面取り部の軸方向寸法が１〜５ｍｍの範囲に設定されていれば、側面が旋削加工によって削り取られても外周縁に面取り部が残り、バリが発生するのを防止すると共に、外周面がエッジになることなく平坦部が確保できる。   Preferably, as in the invention described in claim 2, if the axial dimension of the chamfered portion is set in the range of 1 to 5 mm, the chamfered portion remains on the outer peripheral edge even if the side surface is scraped off by turning. In addition to preventing the occurrence of burrs, a flat portion can be secured without the outer peripheral surface becoming an edge.

また、請求項３に記載の発明は、前記車輪取付フランジが、アウター側の側面に円周等配に穿設されたハブボルト挿通孔の周辺を避けて該ハブボルト挿通孔間に、このハブボルト挿通孔のピッチ円直径より内径側まで切欠きを有する花形形状に形成されていれば、ハブ輪の強度・剛性を損なうことなく軽量化を達成することができる。   According to a third aspect of the present invention, in the hub bolt insertion hole, the wheel mounting flange is disposed between the hub bolt insertion holes while avoiding the periphery of the hub bolt insertion hole formed on the outer side surface at a uniform circumference. If it is formed in a flower shape having a notch from the pitch circle diameter to the inner diameter side, weight reduction can be achieved without impairing the strength and rigidity of the hub wheel.

また、請求項４に記載の発明のように、前記車輪取付フランジが、円板状に形成されて周方向等配にハブボルトが圧入されるハブボルト挿通孔が穿設され、これらハブボルト挿通孔を含んで、鍛造加工によりフランジ基部から放射状に延びて肉厚が厚くされたリブ部が形成されると共に、当該リブ部の端部に所定の面取り部が形成されていれば、リブ部の側面を旋削工程で所望の形状・寸法に形成しても、側面の外周縁にバリが発生して側面側に捲くれ込むことはなく、旋削工程におけるバリ除去が不要となる。したがって、ハブ輪の強度・剛性を確保しつつ軽量・コンパクト化を図ると共に、工数削減によって低コスト化を図ることができる。   According to a fourth aspect of the present invention, the wheel mounting flange is formed in a disc shape, and is provided with hub bolt insertion holes into which hub bolts are press-fitted in a circumferentially uniform manner, including these hub bolt insertion holes. Thus, if a rib portion extending radially from the flange base portion and being thickened is formed by forging and a predetermined chamfered portion is formed at the end portion of the rib portion, the side surface of the rib portion is turned. Even if it is formed in a desired shape and size in the process, burrs are not generated on the outer peripheral edge of the side surface and are not curled up on the side surface side, and burrs need not be removed in the turning process. Therefore, while ensuring the strength and rigidity of the hub wheel, the weight and size can be reduced, and the cost can be reduced by reducing the number of steps.

また、請求項５に記載の発明は、前記外方部材が、外周に懸架装置に取り付けられる車体取付フランジを一体に有し、この車体取付フランジが、この外周部に複数のボルト挿通孔が穿設され、鍛造加工により当該ボルト挿通孔の近傍を除く部分を切欠いて、各ボルト挿通孔の形成部分だけが外径側に放射状に突出する形状に形成されていると共に、前記車体取付フランジの外周縁に、所定の面取り部が形成されていれば、外方部材の強度・剛性を損なうことなく軽量化を達成することができると共に、車体取付フランジの側面を旋削工程で所望の形状・寸法に形成する時、側面の外周縁にバリが発生して側面側に捲くれ込むことはなく、旋削工程におけるバリ除去が不要となる。したがって、強度・剛性を確保しつつ軽量・コンパクト化を図ると共に、工数削減によって低コスト化を図ることができる。   According to a fifth aspect of the present invention, the outer member integrally has a vehicle body mounting flange attached to the suspension device on the outer periphery, and the vehicle body mounting flange has a plurality of bolt insertion holes formed in the outer peripheral portion. The part except for the vicinity of the bolt insertion hole is notched by forging, and only the formation part of each bolt insertion hole is formed in a shape projecting radially to the outer diameter side. If a predetermined chamfered portion is formed on the periphery, weight reduction can be achieved without impairing the strength and rigidity of the outer member, and the side surface of the vehicle body mounting flange can be made into a desired shape and size by a turning process. When forming, burrs are not generated on the outer peripheral edge of the side surface and are not curled up on the side surface, and burrs are not removed in the turning process. Therefore, while ensuring strength and rigidity, it is possible to reduce the cost by reducing the number of steps while reducing the weight and size.

本発明に係る車輪用軸受装置は、内周に複列の外側転走面が形成された外方部材と、アウトボード側の端部に車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪とからなり、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、前記両転走面間に転動自在に収容された複列の転動体とを備えた車輪用軸受装置において、前記車輪取付フランジの外周縁に、鍛造加工により所定の面取り部が形成され、この面取り部が当該車輪取付フランジの外周の両端部に形成されているので、車輪取付フランジのアウター側の側面を旋削工程で所望の形状・寸法に形成する時、側面の外周縁にバリが発生して側面側に捲くれ込むことはなく、旋削工程におけるバリ除去が不要となる。したがって、強度・剛性を確保しつつ軽量・コンパクト化を図ると共に、工数削減によって低コスト化を図ることができる。 The wheel bearing device according to the present invention has an outer member in which a double row outer rolling surface is formed on the inner periphery, and a wheel mounting flange at the end on the outboard side, and the outer periphery in the axial direction. A hub ring formed with a small-diameter step that extends, and at least one inner ring press-fitted into the small-diameter step of the hub ring. In a wheel bearing device comprising an inner member having a surface formed therein and a double row rolling element that is slidably accommodated between both rolling surfaces, a forging process is performed on an outer peripheral edge of the wheel mounting flange. A predetermined chamfered part is formed by this, and this chamfered part is formed at both ends of the outer periphery of the wheel mounting flange. , Burrs occur on the outer peripheral edge of the side surface and creep into the side surface Never, burr removal is unnecessary in the turning process. Therefore, while ensuring strength and rigidity, it is possible to reduce the cost by reducing the number of steps while reducing the weight and size.

外周に懸架装置に取り付けられる車体取付フランジを一体に有し、内周に複列の外側転走面が形成された外方部材と、アウトボード側の端部に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に対向する一方の内側転走面と、この内側転走面から軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入され、外周に前記複列の外側転走面に対向する他方の内側転走面が形成された内輪とからなる内方部材と、前記両転走面間に転動自在に収容された複列の転動体とを備えた車輪用軸受装置において、前記車輪取付フランジが、鍛造加工によりアウター側の側面に円周等配に穿設されたハブボルト挿通孔の周辺を避けて該ハブボルト挿通孔間に、このハブボルト挿通孔のピッチ円直径より内径側まで切欠きを有する花形形状に形成されると共に、当該車輪取付フランジの外周縁に、軸方向寸法が１〜５ｍｍの範囲に設定された面取り部が形成されている。   It has a vehicle body mounting flange that is attached to the suspension system on the outer periphery, an outer member with a double row outer rolling surface formed on the inner periphery, and a wheel mounting flange that is integrated on the end on the outboard side. A hub wheel having one inner rolling surface facing the outer rolling surface of the double row on the outer periphery, a small-diameter step portion extending in the axial direction from the inner rolling surface, and a small-diameter step portion of the hub wheel An inner member comprising an inner ring formed on the outer periphery and formed with the other inner rolling surface facing the outer rolling surface of the double row on the outer periphery, and accommodated in a freely rollable manner between the both rolling surfaces. A wheel bearing device comprising a double row rolling element, wherein the wheel mounting flange avoids the periphery of a hub bolt insertion hole that is perforated at a uniform circumference on a side surface on the outer side by forging. In between, the notch from the pitch circle diameter of this hub bolt insertion hole to the inner diameter side Is formed in a flower shape having a outer peripheral edge of the wheel mounting flange, chamfer axial dimension is set in the range of 1~5mm is formed.

以下、本発明の実施の形態を図面に基いて詳細に説明する。
図１は、本発明に係る車輪用軸受装置の第１の実施形態を示す縦断面図、図２は、図１の側面図、図３（ａ）〜（ｃ）は、ハブ輪の鍛造工程を示す説明図、図４（ａ）は、ハブ輪単体を示す正面図、（ｂ）は、（ａ）のＩＶ−ＩＶ線に沿った拡大横断面図、図５は、外方部材の鍛造工程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（図面左側）、中央寄り側をインナー側（図面右側）という。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention, FIG. 2 is a side view of FIG. 1, and FIGS. 3A to 3C are forging steps of a hub wheel. FIG. 4A is a front view showing a single hub wheel, FIG. 4B is an enlarged cross-sectional view taken along line IV-IV in FIG. 5A, and FIG. 5 is forging of the outer member. It is explanatory drawing which shows a process. In the following description, the side closer to the outer side of the vehicle in a state assembled to the vehicle is referred to as the outer side (left side in the drawing), and the side closer to the center is referred to as the inner side (right side in the drawing).

この車輪用軸受装置は、従動輪を回転自在に支承する第３世代と称され、内方部材１と外方部材２、および両部材１、２間に転動自在に収容された複列の転動体（ボール）３、３とを備えている。ここで、内方部材１は、ハブ輪４と、このハブ輪４に圧入された内輪５とを指す。   This wheel bearing device is referred to as a third generation for rotatably supporting the driven wheel, and is composed of a double row of the inner member 1, the outer member 2, and the two members 1 and 2 accommodated so as to roll freely. Rolling elements (balls) 3 and 3 are provided. Here, the inner member 1 indicates a hub ring 4 and an inner ring 5 press-fitted into the hub ring 4.

ハブ輪４は、外周のアウター側の端部に放射状に延びる４つに分割された車輪取付フランジ（以下、車輪取付アームと言う）６を一体に有し、この車輪取付アーム６の円周等配位置には車輪を締結するためのハブボルト６ａが植設されている。車輪取付アーム６は、ハブボルト挿通孔６ｂの近傍を除く部分を切欠いて、各ハブボルト挿通孔６ｂの形成部分と略同じ幅でもって、環状の基部、すなわち、ブレーキパイロット部６ｃから放射状に突出して形成されている。これにより、外方部材２をナックルに締結する際に、この車輪取付アーム６に邪魔されることなく、締付工具等にて容易にナックルボルトを締結することができ、組立作業を簡便化することができる。   The hub wheel 4 integrally has a wheel mounting flange (hereinafter referred to as a wheel mounting arm) 6 that is divided into four radially extending at the outer end of the outer periphery, and the circumference of the wheel mounting arm 6 or the like. Hub bolts 6a for fastening the wheels are planted at the arrangement positions. The wheel mounting arm 6 is formed by notching a portion except the vicinity of the hub bolt insertion hole 6b and having a width substantially the same as that of each hub bolt insertion hole 6b and projecting radially from the annular base, that is, the brake pilot portion 6c. Has been. As a result, when the outer member 2 is fastened to the knuckle, the knuckle bolt can be easily fastened with a tightening tool or the like without being obstructed by the wheel mounting arm 6, thereby simplifying the assembling work. be able to.

ハブ輪４の外周には、一方（アウター側）の内側転走面４ａと、この内側転走面４ａから軸方向に延びる小径段部４ｂが形成され、この小径段部４ｂに内輪５が所定のシメシロを介して圧入されている。内輪５の外周には他方（インナー側）の内側転走面５ａが形成されている。そして、小径段部４ｂの端部を径方向外方に塑性変形させて加締部４ｃが形成されている。内輪５はこの加締部４ｃによってハブ輪４に対して軸方向に固定され、所謂セルフリテイン構造をなしている。したがって、ハブ輪４の強度・剛性を確保しつつ、軽量・コンパクト化を図ることができる。また、従来のように内輪をナット等で強固に緊締して予圧量を管理する必要がないため、車両への組込性を簡便にすることができ、長期間その予圧量を維持することができると共に、部品点数を大幅に削減でき、組込性の向上と相俟って低コスト化を達成することができる。なお、本発明に係る車輪用軸受においては、例示した第３世代構造に限らず、例えば、図示はしないが、ハブ輪の小径段部に一対の内輪が圧入される第１または第２世代構造であっても良い。   On the outer periphery of the hub wheel 4, one (outer side) inner rolling surface 4a and a small-diameter step portion 4b extending in the axial direction from the inner rolling surface 4a are formed, and an inner ring 5 is predetermined on the small-diameter step portion 4b. It is press-fitted through a shimeshiro. The other (inner side) inner rolling surface 5 a is formed on the outer periphery of the inner ring 5. And the crimping part 4c is formed by carrying out the plastic deformation of the edge part of the small diameter step part 4b to radial direction outward. The inner ring 5 is fixed in the axial direction with respect to the hub wheel 4 by the caulking portion 4c, and has a so-called self-retaining structure. Therefore, it is possible to reduce the weight and size while securing the strength and rigidity of the hub wheel 4. Moreover, since it is not necessary to control the preload amount by tightening the inner ring firmly with a nut or the like as in the prior art, it is possible to simplify the incorporation into the vehicle and maintain the preload amount for a long time. In addition, the number of parts can be greatly reduced, and the cost can be reduced in combination with the improvement of the incorporation. The wheel bearing according to the present invention is not limited to the illustrated third generation structure. For example, although not illustrated, the first or second generation structure in which a pair of inner rings are press-fitted into the small-diameter step portion of the hub wheel. It may be.

外方部材２の内周には、内方部材１の複列の内側転走面４ａ、５ａに対向する複列の外側転走面２ａ、２ａが形成され、これら両転走面２ａ、４ａおよび２ａ、５ａ間に保持器７を介して複列の転動体３、３が転動自在に収容されている。また、外方部材２のアウター側の端部にはシール８が装着され、外方部材２と内方部材１との間に形成される環状空間の開口部を密封している。一方、外方部材２のインナー側の端部には、カップ状のシールキャップ（図示せず）が装着され、外方部材２の開口部を閉塞している。これらシール８およびシールキャップにより、軸受内部に封入された潤滑グリースの外部への漏洩と、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。   On the inner periphery of the outer member 2, double-row outer rolling surfaces 2a, 2a are formed opposite to the double-row inner rolling surfaces 4a, 5a of the inner member 1, and both the rolling surfaces 2a, 4a are formed. And the double row rolling elements 3 and 3 are accommodated so that rolling is possible via the holder | retainer 7 between 2a and 5a. Further, a seal 8 is attached to the outer end of the outer member 2 to seal the opening of the annular space formed between the outer member 2 and the inner member 1. On the other hand, a cup-shaped seal cap (not shown) is attached to the inner end of the outer member 2 to close the opening of the outer member 2. The seal 8 and the seal cap prevent leakage of lubricating grease sealed inside the bearing and intrusion of rainwater, dust, and the like from the outside into the bearing.

また、外方部材２は、外周に懸架装置を構成するナックル（図示せず）に取り付けられる車体取付フランジ２ｂを一体に有し、この車体取付フランジ２ｂの外周部に複数のボルト挿通孔９が穿設されている。この車体取付フランジ２ｂは、その外周部のうちボルト挿通孔９の近傍を除く部分を切欠いて、各ボルト挿通孔９の形成部分だけが外径側に放射状に突出する形状に形成されている。すなわち、車体取付フランジ２ｂは、円周方向に離れた複数の部分フランジ１０に分割されている。そして、ボルト挿通孔９に貫通するナックルボルト（図示せず）によりナックルに固定される。さらに、外方部材２のインナー側の端部には、前記車体取付フランジ２ｂから軸方向に延びる円筒状のナックルパイロット部２ｃが形成され、このナックルパイロット部２ｃの外径面にナックルが嵌合される。   Further, the outer member 2 integrally has a vehicle body mounting flange 2b attached to a knuckle (not shown) constituting a suspension device on the outer periphery, and a plurality of bolt insertion holes 9 are formed on the outer periphery of the vehicle body mounting flange 2b. It has been drilled. The vehicle body mounting flange 2b is formed in a shape in which a portion excluding the vicinity of the bolt insertion hole 9 in the outer peripheral portion thereof is cut out, and only a portion where each bolt insertion hole 9 is formed projects radially to the outer diameter side. That is, the vehicle body mounting flange 2b is divided into a plurality of partial flanges 10 separated in the circumferential direction. And it is fixed to the knuckle by a knuckle bolt (not shown) that penetrates the bolt insertion hole 9. Further, a cylindrical knuckle pilot portion 2c extending in the axial direction from the vehicle body mounting flange 2b is formed at the inner end of the outer member 2, and the knuckle is fitted to the outer diameter surface of the knuckle pilot portion 2c. Is done.

このように、外方部材２は、外周に放射状に延びる複数の部分フランジ１０からなる車体取付フランジ２ｂが形成されているので、外方部材２の強度・剛性を損なうことなく軽量化を達成することができる。なお、前記ナックルパイロット部２ｃが、その円周方向の複数箇所に切欠きが設けられ、断続して突片状に形成されていても良い。これにより、外方部材２の剛性を低下させることなくさらに軽量化を図ることができる。   Thus, the outer member 2 is formed with the vehicle body mounting flange 2b composed of a plurality of partial flanges 10 extending radially on the outer periphery, so that weight reduction can be achieved without impairing the strength and rigidity of the outer member 2. be able to. The knuckle pilot portion 2c may be provided with notches at a plurality of locations in the circumferential direction, and may be intermittently formed in a protruding piece shape. Thereby, further weight reduction can be achieved without reducing the rigidity of the outer member 2.

ハブ輪４は、Ｓ５３Ｃ等の炭素０．４０〜０．８０ｗｔ％を含む中炭素鋼で形成され、車輪取付アーム６のインボード側の基部および小径段部４ｂに亙り高周波焼入れによって表面硬さを５８〜６４ＨＲＣの範囲に硬化処理されている。なお、加締部４ｃは、鍛造後の素材表面硬さ２５ＨＲＣ以下の未焼入れ部としている。これにより、ハブ輪４の強度・剛性を確保すると共に、内輪５との嵌合面のフレッティング摩耗を防止することができ、ハブ輪４の耐久性が向上する。また、加締部４ｃを塑性変形させる時の加工性が向上し、加工時におけるクラック等の発生を防止して品質の信頼性を向上させることができる。   The hub wheel 4 is formed of medium carbon steel containing carbon of 0.40 to 0.80 wt% such as S53C, and the surface hardness is increased by induction hardening on the inboard side base portion and the small diameter step portion 4b of the wheel mounting arm 6. Curing treatment is performed in the range of 58 to 64 HRC. The caulking portion 4c is an unquenched portion having a surface hardness of 25HRC or less after forging. As a result, the strength and rigidity of the hub wheel 4 can be secured, and fretting wear of the fitting surface with the inner ring 5 can be prevented, and the durability of the hub wheel 4 is improved. In addition, workability when the caulking portion 4c is plastically deformed can be improved, and generation of cracks or the like during processing can be prevented to improve quality reliability.

また、外方部材２は、ハブ輪４と同様、Ｓ５３Ｃ等の炭素０．４０〜０．８０ｗｔ％を含む中炭素鋼で形成され、複列の外側転走面２ａ、２ａが高周波焼入れによって表面硬さを５８〜６４ＨＲＣの範囲に硬化処理されている。一方、内輪５は、ＳＵＪ２等の高炭素クロム軸受鋼からなり、ズブ焼入れにより芯部まで５８〜６４ＨＲＣの範囲で硬化処理されている。なお、ここでは、転動体３、３をボールとした複列アンギュラ玉軸受を例示したが、これに限らず転動体に円錐ころを使用した複列円錐ころ軸受であっても良い。   The outer member 2 is formed of medium carbon steel containing 0.40 to 0.80 wt% of carbon, such as S53C, like the hub wheel 4, and the double row outer rolling surfaces 2a and 2a are surfaced by induction hardening. Hardening is performed in the range of 58 to 64 HRC. On the other hand, the inner ring 5 is made of high carbon chrome bearing steel such as SUJ2, and is hardened in the range of 58 to 64 HRC up to the core part by quenching. In addition, although the double row angular contact ball bearing which used the rolling elements 3 and 3 as a ball | bowl was illustrated here, it is not restricted to this, The double row tapered roller bearing which uses a tapered roller for a rolling element may be sufficient.

ここで、本実施形態では、ハブ輪４は、図３に示すような鍛造工程によって製造されている。すなわち、ハブ輪４’は、（ａ）に示すように、内側転走面をはじめ所望の形状の外周面に合致した内周面を有する上型１１ａと、この上型１１ａと軸方向に対向し、所望の形状を有する下型１１ｂとからなる鍛造金型１１によって形成されている。そして、車輪取付アーム６’の外周まで鍛造素材が流動し易いよう、これら上型１１ａと下型１１ｂは、車輪取付アーム６’の外周面で、環状の空洞部１２を介して互いに衝合するように構成されている。これにより、（ｂ）に示すように、ハブ輪４’の車輪取付アーム６’の外周にはヒレ状のバリ１３が形成される。このバリ１３は、（ｃ）に示す最終工程で、抜き型１４によってせん断除去されるが、このような鍛造工程で製造された車輪取付アーム６’の外周の両端部には所定の曲率半径ｒからなる面取り部１５が形成されている。   Here, in the present embodiment, the hub wheel 4 is manufactured by a forging process as shown in FIG. That is, as shown in FIG. 4A, the hub wheel 4 ′ has an upper die 11a having an inner peripheral surface that matches the outer peripheral surface of a desired shape including the inner rolling surface, and is opposed to the upper die 11a in the axial direction. And it is formed with the forge metal mold | die 11 which consists of the lower mold | type 11b which has a desired shape. And these upper mold | type 11a and lower mold | type 11b collide with each other via the annular cavity part 12 by the outer peripheral surface of wheel mounting arm 6 'so that a forging raw material may flow easily to the outer periphery of wheel mounting arm 6'. It is configured as follows. As a result, as shown in (b), a fin-like burr 13 is formed on the outer periphery of the wheel mounting arm 6 'of the hub wheel 4'. The burrs 13 are sheared and removed by the punching die 14 in the final step shown in FIG. 4C, and a predetermined radius of curvature r is provided at both ends of the outer periphery of the wheel mounting arm 6 ′ manufactured by the forging step. A chamfered portion 15 is formed.

このような鍛造工程で製造されたハブ輪４’は、図４に示すように、外周面をはじめ車輪取付アーム６’のアウター側の側面６ｄが旋削工程で所望の形状・寸法に形成される。この時、外周の両端部に面取り部１５が形成されているため、側面６ｄの外周縁にバリが発生し、側面６ｄ側に捲くれ込むことはない。したがって、車輪取付アーム６’の側面６ｄのバリ除去が不要となり、工数削減によって低コスト化を図ることができる。   As shown in FIG. 4, in the hub wheel 4 ′ manufactured by such a forging process, the outer side surface 6d of the wheel mounting arm 6 ′ including the outer peripheral surface is formed in a desired shape and size by the turning process. . At this time, since the chamfered portions 15 are formed at both ends of the outer periphery, burrs are generated at the outer peripheral edge of the side surface 6d, and the side surface 6d is not curled up. Therefore, it is not necessary to remove burrs on the side surface 6d of the wheel mounting arm 6 ', and the cost can be reduced by reducing the number of steps.

なお、鍛造工程で製造されたハブ輪４’における車輪取付アーム６’の面取り部１５は、軸方向寸法Ｌが１〜５ｍｍ、好ましくは、２〜４ｍｍの範囲に設定されている。すなわち、車輪取付アーム６’の側面６ｄが旋削加工によって通常１ｍｍ程度削り取られるため、軸方向寸法Ｌが少なくとも１ｍｍ必要であると共に、この軸方向寸法１５ａが大きくなり過ぎると、車輪取付アーム６’の外周面の平坦部が少なくなってエッジになるため、上限は５ｍｍに設定されている。   The chamfered portion 15 of the wheel mounting arm 6 ′ in the hub wheel 4 ′ manufactured in the forging process has an axial dimension L set in a range of 1 to 5 mm, preferably 2 to 4 mm. That is, the side surface 6d of the wheel mounting arm 6 'is usually cut by about 1 mm by turning, so that the axial dimension L is required to be at least 1 mm, and if the axial dimension 15a becomes too large, the wheel mounting arm 6' Since the flat part of the outer peripheral surface is reduced and becomes an edge, the upper limit is set to 5 mm.

さらに、本実施形態では、外方部材２もハブ輪４と同様、鍛造工程で車体取付フランジ２ｂの部分フランジ１０が、面取り部１７を有する外周に形成されている。すなわち、図５に示すように、ナックルパイロット部をはじめ所望の形状の外周面に合致した内周面を有する上型１６ａと、この上型１６ａと軸方向に対向し、所望の形状を有する下型１６ｂとからなる鍛造金型１６によって形成されている。そして、部分フランジ１０’の外周まで鍛造素材が流動し易いよう、これら上型１６ａと下型１６ｂは、部分フランジ１０’の外周面で、環状の空洞部１８を介して互いに衝合するように構成されている。これにより、外方部材２’の部分フランジ１０’の外周にはヒレ状のバリ１９が形成される。このバリ１９は、図示しない最終工程で、抜き型によってせん断除去されるが、このような鍛造工程で製造された部分フランジ１０’の外周の両端部には所定の曲率半径Ｒからなる面取り部１７が形成されている。   Further, in the present embodiment, the outer member 2 is also formed with the outer flange 2 having the chamfered portion 17 in the forging process in the same manner as the hub wheel 4 in the forging process. That is, as shown in FIG. 5, the upper die 16a having an inner peripheral surface that matches the outer peripheral surface of a desired shape including the knuckle pilot portion, and the lower die having a desired shape that is opposed to the upper die 16a in the axial direction. It is formed by a forging die 16 composed of a die 16b. The upper die 16a and the lower die 16b are brought into contact with each other via the annular cavity 18 on the outer peripheral surface of the partial flange 10 'so that the forging material easily flows to the outer periphery of the partial flange 10'. It is configured. Thereby, a fin-like burr 19 is formed on the outer periphery of the partial flange 10 ′ of the outer member 2 ′. The burr 19 is sheared and removed by a punching die in a final process (not shown), but the chamfered part 17 having a predetermined radius of curvature R is formed at both ends of the outer periphery of the partial flange 10 ′ manufactured by such a forging process. Is formed.

このような鍛造工程で製造された外方部材２’は、外周面をはじめ部分フランジ１０’のインナー側の側面およびナックルパイロット部が旋削工程で所望の形状・寸法に形成される。この時、外周の両端部に面取り部１９が形成されているため、側面の外周縁にバリが発生し、側面側に捲くれ込むことはない。したがって、部分フランジ１０’の側面のバリ除去が不要となり、工数削減によって一層の低コスト化を図ることができる。なお、鍛造工程で製造された外方部材２’における部分フランジ１０’の面取り部１９は、ハブ輪４’と同様、軸方向寸法Ｌが１〜５ｍｍ、好ましくは、２〜４ｍｍの範囲に設定されている。   In the outer member 2 ′ manufactured by such a forging process, the outer side surface, the inner side surface of the partial flange 10 ′, and the knuckle pilot portion are formed in a desired shape and size by the turning process. At this time, since the chamfered portions 19 are formed at both end portions of the outer periphery, burrs are generated on the outer peripheral edge of the side surface, and the side surface is not curled. Accordingly, it is not necessary to remove the burrs on the side surfaces of the partial flange 10 ', and the cost can be further reduced by reducing the number of steps. In addition, the chamfered portion 19 of the partial flange 10 ′ in the outer member 2 ′ manufactured in the forging process has an axial dimension L set in the range of 1 to 5 mm, preferably 2 to 4 mm, like the hub wheel 4 ′. Has been.

なお、ここでは、車輪取付フランジとして、環状の基部から放射状に突出するように形成された車輪取付アーム６を例示したが、これに限らず、従来のように、ハブボルト挿通孔の周辺を避けてハブボルト挿通孔間に、このハブボルト挿通孔のピッチ円直径より内径側まで深く切欠きが形成された車輪取付フランジのようなものであっても良い。   Here, as the wheel mounting flange, the wheel mounting arm 6 formed so as to protrude radially from the annular base portion is illustrated, but the present invention is not limited to this, and avoids the periphery of the hub bolt insertion hole as in the prior art. It may be a wheel mounting flange having a notch deeply formed between the hub bolt insertion holes to the inner diameter side from the pitch circle diameter of the hub bolt insertion holes.

図６（ａ）は、本発明に係る車輪用軸受装置の第２の実施形態におけるハブ輪を示す正面図、（ｂ）は、（ａ）のＶＩ−ＶＩ線に沿った拡大横断面図である。なお、前述した実施形態と同一の部品や部位には同じ符号を付してその重複した説明を省略する。   FIG. 6A is a front view showing a hub wheel in the second embodiment of the wheel bearing device according to the present invention, and FIG. 6B is an enlarged cross-sectional view taken along line VI-VI in FIG. is there. In addition, the same code | symbol is attached | subjected to the component and site | part same as embodiment mentioned above, and the duplicate description is abbreviate | omitted.

この車輪用軸受装置のハブ輪２０は、一端部に車輪取付フランジ２１を有し、（ａ）に示すように、車輪取付フランジ２１は円板状に形成され、周方向等配にハブボルト（図示せず）が圧入されるハブボルト挿通孔２２が穿設されている。そして、車輪取付フランジ２１は、外周に向って漸次肉厚が薄くされた薄肉部２３と、各ハブボルト挿通孔２２を含んでフランジ基部から放射状に延び、肉厚が厚くされたリブ部２４とで構成されている。これにより、軽量化を図りながらも、車輪取付フランジ２１の曲げ剛性が低下するのを防止している。ここで、前述した実施形態と同様、車輪取付フランジ２１の外周の両端部に、鍛造工程で面取り（図示せず）が形成されると共に、リブ部２４の端部に所定の曲率半径ｒからなる面取り部２５が形成されている。   The hub wheel 20 of this wheel bearing device has a wheel mounting flange 21 at one end, and as shown in FIG. 5A, the wheel mounting flange 21 is formed in a disc shape and has hub bolts (see FIG. A hub bolt insertion hole 22 into which a not shown) is press-fitted is formed. The wheel mounting flange 21 includes a thin portion 23 whose thickness is gradually reduced toward the outer periphery, and a rib portion 24 which includes each hub bolt insertion hole 22 and extends radially from the flange base portion and is thickened. It is configured. This prevents the bending rigidity of the wheel mounting flange 21 from being lowered while reducing the weight. Here, as in the above-described embodiment, chamfering (not shown) is formed at both ends of the outer periphery of the wheel mounting flange 21 by a forging process, and the end of the rib portion 24 has a predetermined radius of curvature r. A chamfered portion 25 is formed.

鍛造工程で製造されたリブ部２４は、（ｂ）に示すように、側面２４ａが旋削工程で所望の寸法に形成されるが、この面取り部２５は、前述した実施形態と同様、旋削取代等を考慮して、軸方向寸法Ｌが１〜５ｍｍ、好ましくは、２〜４ｍｍの範囲に設定されている。このように、リブ部２４の端部２４ａに面取り部２５が形成されているため、旋削加工において、側面２４ａの外周縁にバリが発生し、側面２４ａ側に捲くれ込むことはない。したがって、リブ部２４の側面２４ａのバリ除去が不要となり、工数削減によって低コスト化を図ることができる。   As shown in (b), the rib portion 24 manufactured in the forging process has a side surface 24a having a desired dimension in the turning process. The chamfered portion 25 has a turning allowance and the like as in the above-described embodiment. In consideration of the above, the axial dimension L is set in the range of 1 to 5 mm, preferably 2 to 4 mm. Thus, since the chamfered portion 25 is formed at the end portion 24a of the rib portion 24, burrs are generated at the outer peripheral edge of the side surface 24a in turning, and the burr portion is not curled toward the side surface 24a side. Therefore, it is not necessary to remove the burrs on the side surface 24a of the rib portion 24, and the cost can be reduced by reducing the number of steps.

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、車輪取付フランジを一体に有するハブ輪を備えた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 provided with a hub wheel integrally having a wheel mounting flange, regardless of whether it is for a driving wheel or a driven wheel.

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の側面図である。It is a side view of FIG. （ａ）〜（ｃ）は、図１のハブ輪の鍛造工程を示す説明図である。(A)-(c) is explanatory drawing which shows the forge process of the hub wheel of FIG. （ａ）は、図１のハブ輪単体を示す正面図である。 （ｂ）は、（ａ）のＩＶ−ＩＶ線に沿った拡大横断面図である。(A) is a front view which shows the hub ring single-piece | unit of FIG. (B) is an expanded cross-sectional view along the IV-IV line of (a). 図１の外方部材の鍛造工程を示す説明図である。It is explanatory drawing which shows the forge process of the outward member of FIG. （ａ）は、本発明に係る車輪用軸受装置の第２の実施形態におけるハブ輪を示す正面図である。 （ｂ）は、（ａ）のＶＩ−ＶＩ線に沿った拡大横断面図である。(A) is a front view which shows the hub ring in 2nd Embodiment of the bearing apparatus for wheels which concerns on this invention. (B) is an expanded cross-sectional view along the VI-VI line of (a). 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. 従来のハブ輪単体を示す正面図である。It is a front view which shows the conventional hub ring single-piece | unit. （ａ）〜（ｃ）は、図８のハブ輪の鍛造工程を示す説明図である。(A)-(c) is explanatory drawing which shows the forge process of the hub wheel of FIG.

符号の説明Explanation of symbols

１・・・・・・・・・・・・・・・・・内方部材
２・・・・・・・・・・・・・・・・・外方部材
２ｂ・・・・・・・・・・・・・・・・車体取付フランジ
２ｃ・・・・・・・・・・・・・・・・ナックルパイロット部
３・・・・・・・・・・・・・・・・・転動体
４、４’、２０・・・・・・・・・・・ハブ輪
４ａ、５ａ・・・・・・・・・・・・・内側転走面
４ｂ・・・・・・・・・・・・・・・・小径段部
４ｃ・・・・・・・・・・・・・・・・加締部
５・・・・・・・・・・・・・・・・・内輪
６、６’・・・・・・・・・・・・・・車輪取付アーム
６ａ・・・・・・・・・・・・・・・・ハブボルト
６ｂ、２２・・・・・・・・・・・・・ハブボルト挿通孔
６ｃ・・・・・・・・・・・・・・・・ブレーキパイロット部
６ｄ、２４ａ・・・・・・・・・・・・側面
７・・・・・・・・・・・・・・・・・保持器
８・・・・・・・・・・・・・・・・・シール
９・・・・・・・・・・・・・・・・・ボルト挿通孔
１０、１０’・・・・・・・・・・・・部分フランジ
１１、１６・・・・・・・・・・・・・鍛造金型
１１ａ、１６ａ・・・・・・・・・・・上型
１１ｂ、１６ｂ・・・・・・・・・・・下型
１２、１８・・・・・・・・・・・・・空洞部
１３、１９・・・・・・・・・・・・・バリ
１４・・・・・・・・・・・・・・・・抜き型
１５、１７、２５・・・・・・・・・・面取り部
２１・・・・・・・・・・・・・・・・車輪取付フランジ
２３・・・・・・・・・・・・・・・・薄肉部
２４・・・・・・・・・・・・・・・・リブ部
５１・・・・・・・・・・・・・・・・ハブ輪
５１ａ、５５ａ・・・・・・・・・・・内側転走面
５１ｂ・・・・・・・・・・・・・・・小径段部
５２・・・・・・・・・・・・・・・・複列の転がり軸受
５３・・・・・・・・・・・・・・・・車輪取付フランジ
５３ａ・・・・・・・・・・・・・・・ハブボルト
５４・・・・・・・・・・・・・・・・スプライン
５５・・・・・・・・・・・・・・・・内輪
５６・・・・・・・・・・・・・・・・加締部
５７・・・・・・・・・・・・・・・・外方部材
５７ａ・・・・・・・・・・・・・・・外側転走面
５７ｂ・・・・・・・・・・・・・・・車体取付部
５８・・・・・・・・・・・・・・・・ナックル
５９・・・・・・・・・・・・・・・・ボール
６０・・・・・・・・・・・・・・・・ブレーキロータ
６１・・・・・・・・・・・・・・・・ボルト挿通孔
６２・・・・・・・・・・・・・・・・切欠き部
６３・・・・・・・・・・・・・・・・薄肉部
６４・・・・・・・・・・・・・・・・厚肉部
６５・・・・・・・・・・・・・・・・上型
６６・・・・・・・・・・・・・・・・下型
６７・・・・・・・・・・・・・・・・側面
６８・・・・・・・・・・・・・・・・バリ
Ａ・・・・・・・・・・・・・・・・・ボルト挿通孔のピッチ円直径
Ｂ・・・・・・・・・・・・・・・・・ボルト挿通孔の中心を結ぶ弦
Ｌ・・・・・・・・・・・・・・・・・面取り部の軸方向寸法 1 .... Inner member 2 ... Outer member 2b ...・ ・ ・ ・ ・ ・ ・ ・ ・ Car body mounting flange 2c ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Knuckle pilot part 3 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・Rolling elements 4, 4 ', 20, ... Hub wheels 4a, 5a ... Inside rolling surface 4b ...・ ・ ・ ・ ・ ・ ・ ・ Small diameter step part 4c ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Clamping part 5 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner ring 6, 6 '......... Wheel mounting arm 6a ......... Hub bolts 6b, 22 ...・ ・ ・ ・ ・ Hub bolt insertion hole 6c ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Brake pilot part 6d, 24a・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Side 7 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Retainer 8 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・Seal 9 ································· Bolt insertion holes .... Forging dies 11a, 16a ... Upper dies 11b, 16b ... Lower dies 12, 18 ...・ ・ ・ ・ ・ ・ ・ ・ ・ Cavities 13 and 19 ・ ・ ・ ・ ・ ・ ・ ・ Burr 14 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Die dies 15, 17, 25・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Chamfer 21 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Wheel mounting flange 23 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Thin wall Part 24 ... rib part 51 ...・ Hub wheel 51a, 55a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner rolling surface 51b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Small diameter step 52 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・·········· Double row rolling bearing 53・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Spline 55 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner ring 56 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・···················································· Outer member 57a ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Body mounting part 58 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Knuckle 59 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Ball 60 ... Brake rotor 61 ... ············ Bolt insertion hole 62 ························································· Part 64 ... Thick part 65 ... Upper mold 66 ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Lower mold 67 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Side 68 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Burr A ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ Pitch circle diameter B of bolt insertion hole ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ String L connecting the center of bolt insertion hole ・ ・ ・.... Axial dimension of chamfer

Claims (5)

内周に複列の外側転走面が形成された外方部材と、
アウトボード側の端部に車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪とからなり、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、
前記両転走面間に転動自在に収容された複列の転動体とを備えた車輪用軸受装置において、
前記車輪取付フランジの外周縁に、鍛造加工により所定の面取り部が形成され、この面取り部が当該車輪取付フランジの外周の両端部に形成されていることを特徴とする車輪用軸受装置。 An outer member having a double row outer raceway formed on the inner periphery;
A hub wheel integrally having a wheel mounting flange at the end on the outboard side and having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub ring An inner member in which a double row inner rolling surface facing the outer rolling surface of the double row is formed on the outer periphery,
In the wheel bearing device comprising a double-row rolling element accommodated between the rolling surfaces so as to roll freely,
A wheel bearing device, wherein a predetermined chamfered portion is formed on the outer peripheral edge of the wheel mounting flange by forging, and the chamfered portion is formed at both ends of the outer periphery of the wheel mounting flange . 前記面取り部の軸方向寸法が１〜５ｍｍの範囲に設定されている請求項１に記載の車輪用軸受装置。   The wheel bearing device according to claim 1, wherein an axial dimension of the chamfered portion is set in a range of 1 to 5 mm. 前記車輪取付フランジが、アウター側の側面に円周等配に穿設されたハブボルト挿通孔の周辺を避けて該ハブボルト挿通孔間に、このハブボルト挿通孔のピッチ円直径より内径側まで切欠きを有する花形形状に形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 wheel mounting flange has a notch from the periphery of the hub bolt insertion hole formed on the side surface on the outer side at a uniform circumference to the inner diameter side of the hub bolt insertion hole from the pitch circle diameter of the hub bolt insertion hole. The wheel bearing device according to claim 1, wherein the wheel bearing device is formed into a flower shape having the shape. 前記車輪取付フランジが、円板状に形成されて周方向等配にハブボルトが圧入されるハブボルト挿通孔が穿設され、これらハブボルト挿通孔を含んで、鍛造加工によりフランジ基部から放射状に延びて肉厚が厚くされたリブ部が形成されると共に、当該リブ部の端部に所定の面取り部が形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 wheel mounting flange is formed in a disk shape, and hub bolt insertion holes into which hub bolts are press-fitted in a circumferentially uniform manner are formed. The wheel bearing device according to claim 1 or 2, wherein a rib portion having a large thickness is formed, and a predetermined chamfered portion is formed at an end portion of the rib portion. 前記外方部材が、外周に懸架装置に取り付けられる車体取付フランジを一体に有し、この車体取付フランジが、この外周部に複数のボルト挿通孔が穿設され、鍛造加工により当該ボルト挿通孔の近傍を除く部分を切欠いて、各ボルト挿通孔の形成部分だけが外径側に放射状に突出する形状に形成されていると共に、前記車体取付フランジの外周縁に、所定の面取り部が形成されている請求項１乃至４にいずれか記載の車輪用軸受装置。
The outer member integrally has a vehicle body mounting flange attached to the suspension device on the outer periphery, and the vehicle body mounting flange has a plurality of bolt insertion holes formed in the outer peripheral portion, and the bolt insertion holes are formed by forging. Not only the part except the vicinity is cut out, only the part where each bolt insertion hole is formed is formed in a shape protruding radially to the outer diameter side, and a predetermined chamfered part is formed on the outer peripheral edge of the vehicle body mounting flange. The wheel bearing device according to any one of claims 1 to 4.
JP2005343083A 2005-11-29 2005-11-29 Wheel bearing device Active JP4936712B2 (en)

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