JP5417239B2 - Wheel bearing device and manufacturing method thereof - Google Patents

Wheel bearing device and manufacturing method thereof Download PDF

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JP5417239B2
JP5417239B2 JP2010077965A JP2010077965A JP5417239B2 JP 5417239 B2 JP5417239 B2 JP 5417239B2 JP 2010077965 A JP2010077965 A JP 2010077965A JP 2010077965 A JP2010077965 A JP 2010077965A JP 5417239 B2 JP5417239 B2 JP 5417239B2
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flange
wheel
reinforcing plate
hub
main body
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JP2011207374A (en
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光 梅木田
浩志 河村
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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
    • F16C33/588—Races of sheet metal
    • 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
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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

Description

本発明は、自動車等の車両の駆動車輪を回転自在に支承する車輪用軸受装置、詳しくは、軽量・コンパクト化と共に、軸受の強度・耐久性の向上を図った車輪用軸受装置およびその製造方法に関するものである。   TECHNICAL FIELD The present invention relates to a wheel bearing device that rotatably supports a drive wheel of a vehicle such as an automobile, and more particularly, to a wheel bearing device that is lightweight and compact and improves the strength and durability of the bearing, and a method for manufacturing the same. It is about.

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複列の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、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、また、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、あるいは、ハブ輪と等速自在継手の外側継手部材の外周にそれぞれ内側転走面が直接形成された第４世代構造とに大別されている。   2. Description of the Related Art Conventionally, a wheel bearing device for supporting a wheel of an automobile or the like supports a hub wheel for mounting a wheel rotatably via a double row rolling bearing, and includes 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. This 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, and is an outer member. 2nd generation structure with body mounting flange or wheel mounting flange formed directly on the outer periphery of the wheel, 3rd generation structure with one inner rolling surface formed directly on the outer periphery of the hub wheel, or constant speed with the hub wheel It is roughly classified into a fourth generation structure in which the inner rolling surface is directly formed on the outer periphery of the outer joint member of the universal joint.

従来、製造コストを低減する目的から、ハブ輪や複列アンギュラ玉軸受について、板材を用いて深絞り加工により製作することが考えられている。このように、ハブ輪や複列アンギュラ玉軸受を深絞り加工で製作する場合、母材として充分な強度を確保するために肉厚の厚い板材を用いると、加工がし難く、曲げ部分の形状・精度が低下し易いので、精度を向上させるための精密技術が要求され、プレス加工であるにもかかわらず、生産効率が悪くなってしまう。   Conventionally, for the purpose of reducing manufacturing costs, it has been considered to manufacture a hub ring and a double row angular ball bearing by deep drawing using a plate material. In this way, when manufacturing hub rings and double row angular contact ball bearings by deep drawing, if a thick plate is used to ensure sufficient strength as the base material, processing is difficult and the shape of the bent part・ Since the accuracy tends to decrease, a precision technique for improving the accuracy is required, and the production efficiency deteriorates despite the press working.

こうした課題を解決したものとして、図５に示すような車輪用軸受装置が知られている。この車輪用軸受装置５０は第３世代構造と呼称され、ハブ輪５１と複列アンギュラ玉軸受５２とを備え、ハブ輪５１は、中空の軸部５３の一方の軸端側に、径方向外方に延出する複数の切り起し片５４と、軸方向に沿って延出する複数の舌片５５とが周方向交互に設けられた構造である。複列アンギュラ玉軸受５２は、軸部５３に外装され、切り起し片５４の一側面に対して図示しない車輪やブレーキロータが軸方向に位置決めされた状態で装着され、切り起し片５４に貫通固定されるハブボルト５６によって固定される。また、各舌片５５において、付根側には、径方向外向きの膨出部５５ａが設けられ、パイロット部が形成されている。   As a solution to these problems, a wheel bearing device as shown in FIG. 5 is known. This wheel bearing device 50 is referred to as a third generation structure, and includes a hub ring 51 and a double-row angular ball bearing 52. The hub ring 51 is disposed radially outward on one shaft end side of the hollow shaft portion 53. A plurality of cut and raised pieces 54 extending in the direction and a plurality of tongue pieces 55 extending along the axial direction are provided alternately in the circumferential direction. The double-row angular ball bearing 52 is mounted on the shaft 53 and mounted with a wheel or brake rotor (not shown) positioned axially on one side of the cut-and-raised piece 54. It is fixed by a hub bolt 56 that is fixed through. Further, each tongue piece 55 is provided with a radially outwardly bulging portion 55a on the root side to form a pilot portion.

複列アンギュラ玉軸受５２は、内周に複列の外側転走面５７ａ、５７ａが形成された外方部材５７と、外周に一方の内側転走面５１ａが形成されたハブ輪５１と、このハブ輪５１の軸部５３の小径段部５３ａに外嵌され、外周に内側転走面５８ａが形成された内輪５８と、保持器５９を介して配列された複列のボール６０、６０とを備えている。   The double row angular contact ball bearing 52 includes an outer member 57 in which double row outer rolling surfaces 57a and 57a are formed on the inner periphery, a hub wheel 51 in which one inner rolling surface 51a is formed on the outer periphery, An inner ring 58 that is externally fitted to the small-diameter stepped portion 53a of the shaft portion 53 of the hub wheel 51 and has an inner rolling surface 58a formed on the outer periphery, and double rows of balls 60 and 60 arranged via a cage 59 are provided. I have.

外方部材５７の一方の軸端側には、径方向外方に延出する複数の切り起し片６１と、軸方向に沿って延出する複数の舌片６２とが周方向交互に設けられている。この切り起し片６１の一側に対して図示しないナックルが軸方向に位置決めされた状態で装着され、図示しない固定ボルトにより固定されている。また、各舌片５５とナックルの貫通孔内周面とを密に接触させるように互いの寸法関係を規定することにより、ナックルに対して複列アンギュラ玉軸受５２の芯出しが行われる。そして、ハブ輪５１の軸部５３の小径段部５３ａの端部がローリング加締により径方向外方に屈曲され、内輪５８が軸方向に固定されている。   A plurality of cut-and-raised pieces 61 extending radially outward and a plurality of tongue pieces 62 extending along the axial direction are provided alternately on one axial end side of the outer member 57 in the circumferential direction. It has been. A knuckle (not shown) is attached to one side of the cut and raised piece 61 in a state of being positioned in the axial direction and is fixed by a fixing bolt (not shown). In addition, the double row angular ball bearings 52 are centered with respect to the knuckle by defining the dimensional relationship so that each tongue piece 55 and the inner peripheral surface of the through hole of the knuckle are in close contact with each other. The end portion of the small diameter step portion 53a of the shaft portion 53 of the hub wheel 51 is bent radially outward by rolling caulking, and the inner ring 58 is fixed in the axial direction.

ハブ輪５１および複列アンギュラ玉軸受５２の外方部材５７は、円筒管を母材として、冷間鍛造加工、切り込み加工、曲げ加工を経て製作されているので、精密技術を必要とせずに済むと共に、芯出しのための部品を後付けする必要がないので、製造コストを低減することができる。   The outer member 57 of the hub wheel 51 and the double-row angular ball bearing 52 is manufactured through a cold forging process, a cutting process, and a bending process using a cylindrical tube as a base material, so that it does not require a precision technique. At the same time, it is not necessary to retrofit parts for centering, so that the manufacturing cost can be reduced.

特開２００３−２５８０３号公報JP 2003-25803 A

然しながら、この従来の車輪用軸受装置５０では、ハブ輪５１や外方部材５７の切り起し片５４、６１に大きなモーメント荷重が負荷された場合、切り起し片５４、６１が１枚の板材を径方向外方に延出させて形成しているだけのため、強度・剛性が不足し、所望の耐久性が得られないと言った課題がある。さらに、ハブボルト５６がハブ輪５１の切り起し片５４に貫通固定されるが、ハブボルト５６の圧入幅が板厚分の長さのため固定力が不足し、ハブボルト５６が緩む恐れがあった。   However, in this conventional wheel bearing device 50, when a large moment load is applied to the cut and raised pieces 54 and 61 of the hub wheel 51 and the outer member 57, the cut and raised pieces 54 and 61 are a single plate. However, there is a problem that strength and rigidity are insufficient and desired durability cannot be obtained. Further, the hub bolt 56 is fixed to the cut-and-raised piece 54 of the hub wheel 51, but the fixing force is insufficient because the press-fitted width of the hub bolt 56 is equal to the plate thickness, and the hub bolt 56 may be loosened.

ここで、母材として充分な強度を確保するために肉厚の厚い板材を用いると、加工がし難く、曲げ部分の形状・精度が低下し易いので、精度を向上させるための精密技術が要求される。これでは、プレス加工であるにもかかわらず、生産効率が悪くなってしまい製造コストがアップするだけでなく、軽量化を達成することが難しくなる。   Here, if a thick plate material is used to ensure sufficient strength as the base material, it is difficult to process and the shape and accuracy of the bent part are likely to deteriorate, so precision technology to improve accuracy is required. Is done. In this case, in spite of the press working, not only the production efficiency is deteriorated and the manufacturing cost is increased, but also it is difficult to achieve the weight reduction.

本発明は、このような事情に鑑みてなされたもので、軽量・コンパクト化と共に、軸受の強度・耐久性の向上を図った車輪用軸受装置およびその製造方法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, and an object of the present invention is to provide a wheel bearing device and a method for manufacturing the same, which are lightweight and compact and improve the strength and durability of the bearing.

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、内周に複列の円弧状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、外周に前記複列の転走面の一方に対向する円弧状の内側転走面と、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円弧状の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ボールと、前記外方部材と内方部材との間に形成された環状空間の両端開口部に装着されたシールとを備え、前記小径段部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、前記ハブ輪に対して前記内輪が軸方向に固定された車輪用軸受装置において、前記ハブ輪と内輪および外方部材が板材またはパイプ材から塑性加工によって形成され、前記車輪取付フランジが、前記ハブ輪のアウター側の端部に花弁状に突設されたフランジ本体と、このフランジ本体に接合された補強板とで構成され、この補強板が板材から塑性加工によって形成され、前記フランジ本体のアウター側の側面に当接するフランジ部と、このフランジ部から軸方向に延び、前記車輪およびブレーキロータをガイドする円筒状のパイロット部を備えると共に、前記フランジ部の外径部にインロウ部が突設され、前記フランジ本体の外径に所定の嵌合すきまを介して外嵌されている。   In order to achieve such an object, the invention described in claim 1 of the present invention includes an outer member in which a double-row arc-shaped outer rolling surface is integrally formed on the inner periphery, and an outer end portion. A wheel mounting flange for mounting a wheel is integrally formed, and an arcuate inner rolling surface facing one of the double-row rolling surfaces on the outer periphery, and a cylindrical shape extending in the axial direction from the inner rolling surface A hub ring formed with a small-diameter step portion, and an arc-shaped inner rolling surface that is press-fitted into the small-diameter step portion of the hub ring via a predetermined shimiro and faces the other of the outer rolling surfaces of the double row on the outer periphery. An inner member formed of an inner ring formed with an inner ring, a double row of balls accommodated between the rolling surfaces of the inner member and the outer member via a cage, and the outer member. An end of the small-diameter step portion, and a seal attached to both end openings of the annular space formed between the inner member and the inner member. In the wheel bearing device in which the inner ring is fixed in the axial direction with respect to the hub ring by a caulking portion formed by plastically deforming the outer ring in the radial direction, the hub ring, the inner ring, and the outer member are plate members or It is formed from a pipe material by plastic working, and the wheel mounting flange is composed of a flange main body protruding in a petal shape at the outer end of the hub wheel, and a reinforcing plate joined to the flange main body, The reinforcing plate is formed from a plate material by plastic working, and includes a flange portion that comes into contact with an outer side surface of the flange body, and a cylindrical pilot portion that extends in an axial direction from the flange portion and guides the wheel and the brake rotor. In addition, an in-row portion protrudes from the outer diameter portion of the flange portion, and is externally fitted to the outer diameter of the flange main body via a predetermined fitting clearance.

このように、ハブ輪がアウター側の端部に車輪取付フランジを一体に有し、小径段部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、ハブ輪に対して内輪が軸方向に固定された車輪用軸受装置において、ハブ輪と内輪および外方部材が板材またはパイプ材から塑性加工によって形成され、車輪取付フランジが、ハブ輪のアウター側の端部に花弁状に突設されたフランジ本体と、このフランジ本体に接合された補強板とで構成され、この補強板が板材から塑性加工によって形成され、フランジ本体のアウター側の側面に当接するフランジ部と、このフランジ部から軸方向に延び、車輪およびブレーキロータをガイドする円筒状のパイロット部を備えると共に、フランジ部の外径部にインロウ部が突設され、フランジ本体の外径に所定の嵌合すきまを介して外嵌されているので、ハブ輪の軽量化を図りつつ、車輪取付フランジの強度・剛性を高めることができ、大きなモーメント荷重がこの車輪取付フランジに負荷されても耐久性を確保することができる。   In this way, the hub wheel has a wheel mounting flange integrally at the outer end, and the crimped portion formed by plastically deforming the end of the small-diameter stepped portion radially outwardly with respect to the hub wheel. In a wheel bearing device in which the inner ring is fixed in the axial direction, the hub ring, the inner ring, and the outer member are formed by plastic working from a plate material or pipe material, and the wheel mounting flange is petal-like at the outer end of the hub ring. A flange body projecting from the flange body, and a reinforcing plate joined to the flange body, the reinforcing plate is formed by plastic processing from a plate material, and a flange portion that comes into contact with the outer side surface of the flange body, A cylindrical pilot portion that extends in the axial direction from the flange portion and guides the wheel and the brake rotor is provided. Because it is fitted externally through a fixed fitting clearance, it is possible to increase the strength and rigidity of the wheel mounting flange while reducing the weight of the hub wheel, and even if a large moment load is applied to this wheel mounting flange. Durability can be ensured.

また、請求項２に記載の発明のように、前記車輪取付フランジの周方向等配にボルト挿通孔が打ち抜き加工によって穿設されると共に、当該ボルト挿通孔の縁部に所定の面取り部がプレス加工によって形成されていれば、作業効率が向上して低コスト化を図ることができる。   According to a second aspect of the present invention, a bolt insertion hole is formed by punching in the circumferential direction of the wheel mounting flange, and a predetermined chamfered portion is pressed at an edge of the bolt insertion hole. If formed by processing, the working efficiency can be improved and the cost can be reduced.

また、請求項３に記載の発明のように、前記補強板の肉厚が、前記フランジ本体の肉厚に対し７０〜７５％程度の肉厚に設定されていれば、ハブ輪の軽量化を図りつつ、車輪取付フランジの強度・剛性を高めることができる。   If the thickness of the reinforcing plate is set to about 70 to 75% of the thickness of the flange main body as in the invention described in claim 3, the weight of the hub wheel can be reduced. It is possible to increase the strength and rigidity of the wheel mounting flange while achieving the plan.

また、請求項４に記載の発明のように、前記補強板のアウター側の側面に、前記ボルト挿通孔を包含する所定の幅からなる環状溝が切削加工によって形成されていれば、ハブボルトの圧入による側面への変形等の影響を最小限に抑制できる。   Further, as in the invention described in claim 4, if an annular groove having a predetermined width including the bolt insertion hole is formed on the outer side surface of the reinforcing plate by cutting, press-fitting of the hub bolt is performed. It is possible to suppress the influence of deformation to the side due to the minimum.

好ましくは、請求項５に記載の発明のように、前記ボルト挿通孔にハブボルトを圧入後、前記補強板のアウター側の側面が二次切削されていれば、ハブボルトの圧入によって増加した側面の面振れを可及的に抑制することができる。   Preferably, as in the invention described in claim 5, if the outer side surface of the reinforcing plate is secondarily cut after press-fitting a hub bolt into the bolt insertion hole, the side surface increased by press-fitting the hub bolt. The shake can be suppressed as much as possible.

また、請求項６に記載の発明のように、前記外方部材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を一体に有し、この車体取付フランジが、前記外方部材のインナー側の端部に花弁状に突設されたフランジ本体と、このフランジ本体に接合された補強板とで構成され、この補強板が板材から塑性加工によって形成され、前記フランジ本体のインナー側の側面に当接するフランジ部と、このフランジ部から軸方向に延び、前記ナックルに嵌合される円筒状のパイロット部とを備えると共に、前記フランジ部の外径部にインロウ部が突設され、前記フランジ本体の外径に所定の嵌合すきまを介して外嵌されていれば、外方部材の軽量化を図りつつ、車体取付フランジの強度・剛性を高めることができ、大きなモーメント荷重がこの車体取付フランジに負荷されても耐久性を確保することができる。   According to a sixth aspect of the present invention, a vehicle body mounting flange for being attached to a knuckle is integrally formed on the outer periphery of the outer member, and the vehicle body mounting flange is an end on the inner side of the outer member. A flange body projecting in a petal shape at the part, and a reinforcing plate joined to the flange body, and this reinforcing plate is formed from a plate material by plastic working and abuts against the inner side surface of the flange body A flange portion and a cylindrical pilot portion extending in an axial direction from the flange portion and fitted to the knuckle; and an inrow portion protruding from an outer diameter portion of the flange portion; If it is fitted on the diameter via a predetermined clearance, the strength and rigidity of the body mounting flange can be increased while reducing the weight of the outer member. Be loaded on the body mounting flange can be ensured durability.

また、請求項７に記載の発明のように、前記補強板の肉厚が、前記フランジ本体の肉厚に対し７０〜７５％程度の肉厚に設定されていれば、外方部材の軽量化を図りつつ、車体取付フランジの強度・剛性を高めることができる。   Moreover, if the thickness of the said reinforcement board is set to the thickness of about 70 to 75% with respect to the thickness of the said flange main body like invention of Claim 7, the weight reduction of an outer member will be carried out. The strength and rigidity of the vehicle body mounting flange can be increased while achieving the above.

また、本発明のうち請求項８に記載の方法発明は、内周に複列の円弧状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、外周に前記複列の転走面の一方に対向する円弧状の内側転走面と、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円弧状の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ボールと、前記外方部材と内方部材との間に形成された環状空間の両端開口部に装着されたシールとを備え、前記小径段部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、前記ハブ輪に対して前記内輪が軸方向に固定された車輪用軸受装置の製造方法において、前記車輪取付フランジが、前記ハブ輪のアウター側の端部に花弁状に突設されたフランジ本体と、このフランジ本体に接合された補強板とで構成され、この補強板が板材から塑性加工によって形成され、前記フランジ本体のアウター側の側面に当接するフランジ部と、このフランジ部から軸方向に延び、前記車輪およびブレーキロータをガイドする円筒状のパイロット部を備えると共に、前記フランジ部の外径部にインロウ部が突設され、前記フランジ本体の外径に所定の嵌合すきまを介して外嵌され、前記フランジ本体と補強板が接合された状態で、周方向等配にボルト挿通孔が打ち抜き加工によって穿設されていれば、ハブボルトの圧入幅を確保することができ、長期間に亘ってハブボルトが緩むのを防止して固定力を高めることができると共に、車輪取付フランジがフランジ本体と補強板の別体であってもボルト挿通孔の寸法・位置精度が向上する。したがって、ハブボルトの圧入作業が効率良く行われ、ハブボルトが傾いて圧入固定されることはない。   In the method invention according to claim 8 of the present invention, the outer member in which the double row arc-shaped outer rolling surface is integrally formed on the inner periphery and the wheel on the outer end are attached. The wheel mounting flange is integrated with an arcuate inner rolling surface facing one of the double row rolling surfaces on the outer periphery, and a cylindrical small-diameter step portion extending in the axial direction from the inner rolling surface. The formed hub ring and a small-diameter step portion of the hub ring are press-fitted through a predetermined scissors, and an arc-shaped inner rolling surface facing the other of the outer rolling surfaces of the double row is formed on the outer periphery. An inner member formed of an inner ring, a double row of balls accommodated between the rolling surfaces of the inner member and the outer member via a cage, the outer member and the inner member; And seals mounted at both end openings of the annular space formed between and the end of the small-diameter stepped portion In the method of manufacturing a wheel bearing device in which the inner ring is fixed in the axial direction with respect to the hub wheel by a caulking portion formed by plastic deformation in the wheel, the wheel mounting flange is an outer end of the hub wheel. It comprises a flange body projecting in a petal shape on the part and a reinforcing plate joined to the flange body, and this reinforcing plate is formed from a plate material by plastic working and abuts on the outer side surface of the flange body A flange portion and a cylindrical pilot portion that extends in the axial direction from the flange portion and guides the wheel and the brake rotor are provided, and an inrow portion protrudes from an outer diameter portion of the flange portion, and is provided outside the flange main body. Bolt insertion holes are punched out by punching in the circumferential direction with the flange body and the reinforcing plate being joined, with the flange body and the reinforcing plate being joined together. If this is done, the press-fitting width of the hub bolt can be secured, the hub bolt can be prevented from loosening over a long period of time and the fixing force can be increased, and the wheel mounting flange can be separated from the flange body and the reinforcing plate. Even so, the dimensions and position accuracy of the bolt insertion holes are improved. Therefore, the press-fitting work of the hub bolt is performed efficiently, and the hub bolt is not tilted and fixed by press-fitting.

好ましくは、請求項９に記載の発明のように、前記ボルト挿通孔が前記フランジ本体側から打ち抜き加工によって穿設されれば、孔開けピンの入口の破面がせん断面となり、有害なバリ等の発生を防止することができ、ハブボルトの座面に盛り上がり部が生じることがない。   Preferably, as in the invention described in claim 9, if the bolt insertion hole is formed by punching from the flange main body side, the fracture surface of the inlet of the drill pin becomes a shearing surface, and harmful burrs, etc. Can be prevented, and a raised portion does not occur on the seating surface of the hub bolt.

また、請求項１０に記載の発明のように、前記外方部材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を一体に有し、この車体取付フランジが、前記外方部材のインナー側の端部に花弁状に突設されたフランジ本体と、このフランジ本体に接合された補強板とで構成され、この補強板が板材から塑性加工によって形成され、前記フランジ本体のインナー側の側面に当接するフランジ部と、このフランジ部から軸方向に延び、前記ナックルに嵌合される円筒状のパイロット部とを備えると共に、前記フランジ部の外径部にインロウ部が突設され、前記フランジ本体の外径に所定の嵌合すきまを介して外嵌され、前記フランジ本体と補強板のフランジ部を一体に重ね合わせた状態でボルト下孔の打ち抜き加工が行われていれば、固定ボルトの圧入幅を確保することができ、長期間に亘って固定ボルトが緩むのを防止して固定力を高めることができると共に、車体取付フランジがフランジ本体と補強板の別体であってもボルト下孔の寸法・位置精度が向上する。   According to a tenth aspect of the present invention, a vehicle body attachment flange for being attached to a knuckle is integrally provided on the outer periphery of the outer member, and the vehicle body attachment flange is an end on the inner side of the outer member. A flange body projecting in a petal shape at the part, and a reinforcing plate joined to the flange body, and this reinforcing plate is formed from a plate material by plastic working and abuts against the inner side surface of the flange body A flange portion and a cylindrical pilot portion extending in an axial direction from the flange portion and fitted to the knuckle; and an inrow portion protruding from an outer diameter portion of the flange portion; Fixed if the bolt hole is punched out with the flange body and the flange part of the reinforcing plate being integrated together, with the flange body and the flange portion of the reinforcing plate being integrated together. The press-fitting width of the bolt can be secured, the fixing bolt can be prevented from loosening over a long period of time, and the fixing force can be increased, and the body mounting flange can be a separate body of the flange body and the reinforcing plate. Bolt pilot hole dimensions and position accuracy are improved.

本発明に係る車輪用軸受装置は、内周に複列の円弧状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、外周に前記複列の転走面の一方に対向する円弧状の内側転走面と、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円弧状の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ボールと、前記外方部材と内方部材との間に形成された環状空間の両端開口部に装着されたシールとを備え、前記小径段部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、前記ハブ輪に対して前記内輪が軸方向に固定された車輪用軸受装置において、前記ハブ輪と内輪および外方部材が板材またはパイプ材から塑性加工によって形成され、前記車輪取付フランジが、前記ハブ輪のアウター側の端部に花弁状に突設されたフランジ本体と、このフランジ本体に接合された補強板とで構成され、この補強板が板材から塑性加工によって形成され、前記フランジ本体のアウター側の側面に当接するフランジ部と、このフランジ部から軸方向に延び、前記車輪およびブレーキロータをガイドする円筒状のパイロット部を備えると共に、前記フランジ部の外径部にインロウ部が突設され、前記フランジ本体の外径に所定の嵌合すきまを介して外嵌されているので、ハブ輪の軽量化を図りつつ、車輪取付フランジの強度・剛性を高めることができ、大きなモーメント荷重がこの車輪取付フランジに負荷されても耐久性を確保することができる。   The wheel bearing device according to the present invention has an outer member in which a double-row arc-shaped outer rolling surface is integrally formed on the inner periphery, and a wheel mounting flange for mounting the wheel on the outer end. A hub wheel having an arcuate inner rolling surface facing one of the double-row rolling surfaces on the outer periphery, and a cylindrical small-diameter stepped 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 wheel via a predetermined shimiro and has an arc-shaped inner rolling surface facing the other of the outer rolling surfaces of the double row on the outer periphery. And a double row of balls accommodated between the rolling surfaces of the inner member and the outer member via a cage, and the outer member and the inner member. And seals mounted at both ends of the annular space, and plastically deforming the end of the small diameter stepped portion radially outward. In the wheel bearing device in which the inner ring is fixed in the axial direction with respect to the hub ring by the formed crimping portion, the hub ring, the inner ring, and the outer member are formed from a plate material or a pipe material by plastic working, The wheel mounting flange is composed of a flange body projecting in a petal shape at the outer end of the hub wheel, and a reinforcing plate joined to the flange body, and the reinforcing plate is formed from a plate material by plastic working. A flange portion that contacts the outer side surface of the flange main body, a cylindrical pilot portion that extends in an axial direction from the flange portion and guides the wheel and the brake rotor, and an outer diameter portion of the flange portion Since the in-row portion protrudes from the flange body and is fitted on the outer diameter of the flange body through a predetermined fitting clearance, the weight of the hub wheel can be reduced and the vehicle can be reduced. It is possible to increase the strength and rigidity of the mounting flange, large moment load can be ensured durable be loaded on the wheel mounting flange.

また、本発明に係る車輪用軸受装置の製造方法は、内周に複列の円弧状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、外周に前記複列の転走面の一方に対向する円弧状の内側転走面と、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円弧状の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ボールと、前記外方部材と内方部材との間に形成された環状空間の両端開口部に装着されたシールとを備え、前記小径段部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、前記ハブ輪に対して前記内輪が軸方向に固定された車輪用軸受装置の製造方法において、前記ハブ輪と内輪および外方部材が板材またはパイプ材から塑性加工によって形成され、前記車輪取付フランジが、前記ハブ輪のアウター側の端部に花弁状に突設されたフランジ本体と、このフランジ本体に接合された補強板とで構成され、この補強板が板材から塑性加工によって形成されると共に、前記フランジ本体と補強板が接合された状態で、周方向等配にボルト挿通孔が打ち抜き加工によって穿設されているので、ハブボルトの圧入幅を確保することができ、長期間に亘ってハブボルトが緩むのを防止して固定力を高めることができると共に、車輪取付フランジがフランジ本体と補強板の別体であってもボルト挿通孔の寸法・位置精度が向上する。したがって、ハブボルトの圧入作業が効率良く行われ、ハブボルトが傾いて圧入固定されることはない。   The wheel bearing device manufacturing method according to the present invention includes an outer member in which a double-row arc-shaped outer rolling surface is integrally formed on the inner periphery, and a wheel for attaching the wheel to the outer end. A wheel mounting flange is integrally formed, and an arc-shaped inner rolling surface facing one of the double-row rolling surfaces and a cylindrical small-diameter step portion extending in the axial direction from the inner rolling surface are formed on the outer periphery. Hub ring, and an inner ring that is press-fitted into a small-diameter step portion of the hub ring through a predetermined shimiro and has an arc-shaped inner rolling surface facing the other of the double-row outer rolling surfaces on the outer periphery. An inner member, a double row of balls accommodated between the rolling surfaces of the inner member and the outer member via a cage, and the outer member and the inner member. And seals attached to both end openings of the annular space formed between the ends of the small-diameter stepped portion. In the method of manufacturing a wheel bearing device in which the inner ring is fixed in the axial direction with respect to the hub ring by a caulking portion formed by plastic deformation to the hub ring, the hub ring, the inner ring, and the outer member are plate members or pipe members. The wheel mounting flange is formed of a flange body projecting in a petal shape at the outer end of the hub wheel, and a reinforcing plate joined to the flange body. The plate is formed by plastic processing from the plate material, and the bolt insertion holes are punched in the circumferential direction evenly with the flange body and the reinforcing plate joined, ensuring the press-fitting width of the hub bolt The hub bolt can be prevented from loosening over a long period of time and the fixing force can be increased, and the wheel mounting flange is a separate body of the flange body and the reinforcing plate. Dimensions and positional accuracy of the bolt holes is improved even. Therefore, the press-fitting work of the hub bolt is performed efficiently, and the hub bolt is not tilted and fixed by press-fitting.

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の正面図である。It is a front view of FIG. 図１のハブ輪の加工工程を示す説明図で、（ａ）は、孔開け工程、（ｂ）は、面押し工程を示す。It is explanatory drawing which shows the manufacturing process of the hub ring | wheel of FIG. 1, (a) shows a punching process, (b) shows a surface pressing process. （ａ）は、本発明に係る車輪用軸受装置の第２の実施形態を示す正面図、（ｂ）は、（ａ）の要部断面図である。(A) is a front view which shows 2nd Embodiment of the wheel bearing apparatus which concerns on this invention, (b) is principal part sectional drawing 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.

内周に複列の円弧状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、外周に前記複列の転走面の一方に対向する円弧状の内側転走面と、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円弧状の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ボールと、前記外方部材と内方部材との間に形成された環状空間の両端開口部に装着されたシールとを備え、前記小径段部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、前記ハブ輪に対して前記内輪が軸方向に固定された車輪用軸受装置の製造方法において、前記ハブ輪と内輪および外方部材が板材またはパイプ材から塑性加工によって形成され、前記車輪取付フランジが、前記ハブ輪のアウター側の端部に花弁状に突設されたフランジ本体と、このフランジ本体に接合された補強板とで構成され、この補強板が前記フランジ本体の肉厚に対し７０〜７５％程度の肉厚に設定された板材から塑性加工によって形成されると共に、前記フランジ本体と補強板が接合された状態で、周方向等配にボルト挿通孔が前記フランジ本体側から打ち抜き加工によって穿設されている。   The outer member integrally formed with the outer circumferential rolling surface of the double-row arc shape on the inner periphery and the wheel mounting flange for attaching the wheel to the end portion on the outer side are integrally formed, and the double-row on the outer periphery. A hub ring formed with an arcuate inner rolling surface facing one of the rolling surfaces, a cylindrical small-diameter step portion extending in the axial direction from the inner rolling surface, and a predetermined diameter on the small-diameter step portion of the hub ring. An inner member formed by an inner ring that is press-fitted through an outer periphery and has an arc-shaped inner rolling surface facing the other of the outer rolling surfaces of the double row on the outer periphery, and the inner member and the outer member. Mounted in both ends of the annular space formed between the double-row balls accommodated between the rolling surfaces of the member so as to roll freely through a cage and the outer member and the inner member. A crimp portion formed by plastically deforming an end portion of the small-diameter step portion radially outward. In the method of manufacturing a wheel bearing device in which the inner ring is fixed in the axial direction with respect to the wheel ring, the hub ring, the inner ring, and the outer member are formed from a plate material or a pipe material by plastic working, and the wheel mounting flange is The flange body is composed of a flange body projecting in a petal shape at the outer end of the hub wheel, and a reinforcing plate joined to the flange body. The reinforcing plate is 70 to 75 with respect to the thickness of the flange body. %, The bolt insertion holes are punched from the flange body side in the circumferential direction with the flange body and the reinforcing plate being joined. It is installed.

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の正面図、図３は、図１のハブ輪の加工工程を示す説明図で、（ａ）は、孔開け工程、（ｂ）は、面押し工程を示す。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.
1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is an explanatory view showing a processing step of the hub wheel of FIG. (A) shows a punching process and (b) shows a surface pressing process. 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従動輪側の第３世代構造と呼称され、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ボール３、３とを備えている。内方部材１は、ハブ輪４と、このハブ輪４に所定のシメシロを介して圧入された内輪５とからなる。   This wheel bearing device is referred to as a third generation structure on the driven wheel side, and includes a plurality of balls 3, 3, which are accommodated so as to roll between the inner member 1 and the outer member 2, and both members 1, 2. And. The inner member 1 includes a hub ring 4 and an inner ring 5 press-fitted into the hub ring 4 through a predetermined shimiro.

ハブ輪４は、アウター側の端部に車輪（図示せず）を取り付けるための車輪取付フランジ６を一体に有し、外周に一方（アウター側）の円弧状の内側転走面４ａと、この内側転走面４ａから肩部４ｂを介して軸方向に延びる円筒状の小径段部４ｃが形成されている。車輪取付フランジ６にはハブボルト６ａが周方向等配に植設されると共に、これらハブボルト６ａ間には円孔６ｂが形成されている。この円孔６ｂは軽量化に寄与できるだけでなく、装置の組立・分解工程において、レンチ等の締結治具をこの円孔６ｂから挿入することができ作業を簡便化することができる。   The hub wheel 4 integrally has a wheel mounting flange 6 for mounting a wheel (not shown) at an end portion on the outer side, and one (outer side) arcuate inner rolling surface 4a on the outer periphery. A cylindrical small diameter step portion 4c extending in the axial direction from the inner rolling surface 4a via the shoulder portion 4b is formed. Hub bolts 6a are implanted in the wheel mounting flange 6 in a circumferentially equal distribution, and circular holes 6b are formed between the hub bolts 6a. The circular hole 6b can not only contribute to weight reduction, but also a fastening jig such as a wrench can be inserted from the circular hole 6b in the assembly / disassembly process of the apparatus, and the work can be simplified.

内輪５は、外周に他方（インナー側）の円弧状の内側転走面５ａが形成されると共に、この内側転走面５ａの大径側から軸方向に延び、後述するシール２２の嵌合部となる円筒状の肩部７と、この肩部７から径方向内方に屈曲して形成された大端部８、および内側転走面５ａの小径側から軸方向に延びる円筒状の小端部９を備えている。そして、この小端部９がハブ輪４の肩部４ｂに突合せ状態で小径段部４ｃに圧入されて背面合せタイプの複列アンギュラ玉軸受を構成すると共に、小径段部４ｃの端部を内輪５の大端部８の側面に沿って径方向外方に塑性変形させて形成した加締部４ｄによって所定の軸受予圧が付与された状態で軸方向に固定され、所謂セルフリテイン構造を構成している。このような構成を採用することにより、均一な肉厚で精度良く形成することができ、強度・剛性を高めることができると共に、所望の軸受予圧を容易に付与することができる。   The inner ring 5 is formed with the other (inner side) arcuate inner rolling surface 5a on the outer periphery, and extends in the axial direction from the large diameter side of the inner rolling surface 5a. A cylindrical shoulder portion 7, a large end portion 8 formed by bending inward in the radial direction from the shoulder portion 7, and a cylindrical small end portion extending in the axial direction from the small diameter side of the inner rolling surface 5 a Part 9 is provided. The small end portion 9 is pressed into the small diameter step portion 4c in a state of abutting against the shoulder portion 4b of the hub wheel 4 to form a back-to-back type double row angular ball bearing, and the end portion of the small diameter step portion 4c is connected to the inner ring. 5 is fixed in the axial direction in a state where a predetermined bearing preload is applied by a caulking portion 4d formed by plastic deformation radially outward along the side surface of the large end portion 8 to constitute a so-called self-retained structure. ing. By adopting such a configuration, it is possible to form with a uniform thickness and high accuracy, to increase strength and rigidity, and to easily apply a desired bearing preload.

外方部材２は、インナー側の端部にナックル（図示せず）に取り付けられるための車体取付フランジ１０を有し、内周に径方向内方に突出する環状凸部１１と、この環状凸部１１の両側に複列の円弧状の外側転走面２ａ、２ａが一体に形成されている。また、複列の外側転走面２ａ、２ａの両端部には後述するシール１５、１６の嵌合部１２、１３が形成されている。   The outer member 2 has a vehicle body mounting flange 10 to be attached to a knuckle (not shown) at an end on the inner side, an annular protrusion 11 protruding radially inward on the inner periphery, and the annular protrusion. Double-row arc-shaped outer rolling surfaces 2a and 2a are integrally formed on both sides of the portion 11. Further, fitting portions 12 and 13 of seals 15 and 16 to be described later are formed at both ends of the double row outer rolling surfaces 2a and 2a.

内方部材１と外方部材２の両転走面間には複列のボール３、３が収容され、保持器１４、１４によって転動自在に保持されている。そして、内方部材１と外方部材２との間に形成される環状空間の両端開口部にはシール１５、１６が装着され、軸受内部に封入された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。   Between both rolling surfaces of the inner member 1 and the outer member 2, double rows of balls 3 and 3 are accommodated and held by the cages 14 and 14 so as to be freely rollable. Seals 15 and 16 are attached to the opening portions at both ends of the annular space formed between the inner member 1 and the outer member 2, and leakage of grease sealed inside the bearing to the outside and from the outside Rain water and dust are prevented from entering the bearing.

アウター側のシール１５は、外方部材２のアウター側端部の内周に圧入される芯金１７と、この芯金１７に加硫接着により一体に接合されたシール部材１８とからなる一体型のシールで構成されている。芯金１７は、オーステナイト系ステンレス鋼鈑（ＪＩＳ規格のＳＵＳ３０４系等）や冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系等）をプレス加工にて形成されている。   The outer-side seal 15 is an integral type composed of a core metal 17 that is press-fitted into the inner periphery of the outer-side end portion of the outer member 2 and a seal member 18 that is integrally joined to the core metal 17 by vulcanization adhesion. It is composed of a seal. The metal core 17 is formed by press working an austenitic stainless steel plate (JIS standard SUS304 type or the like) or a cold rolled steel plate (JIS standard SPCC type or the like).

一方、シール部材１８はＮＢＲ（アクリロニトリル−ブタジエンゴム）等の合成ゴムからなり、径方向外方に傾斜して形成されたサイドリップ１８ａとダストリップ１８ｂ、および軸受内方側に傾斜して形成されたグリースリップ１８ｃを一体に有している。そして、車輪取付フランジ６のインナー側の基部６ｃは断面が円弧状の曲面に形成され、この基部６ｃにサイドリップ１８ａとダストリップ１８ｂが所定のシメシロをもって摺接されると共に、グリースリップ１８ｃが所定の径方向すきまを介して対峙し、ラビリンスシールが構成されている。   On the other hand, the seal member 18 is made of synthetic rubber such as NBR (acrylonitrile-butadiene rubber), and is formed to be inclined to the side lip 18a and the dust lip 18b formed to be inclined outward in the radial direction, and to the inner side of the bearing. The grease lip 18c is integrally provided. The base portion 6c on the inner side of the wheel mounting flange 6 is formed in a curved surface having an arc-shaped cross section, and the side lip 18a and the dust lip 18b are slidably contacted with the base portion 6c with a predetermined squeezing force, and the grease lip 18c is predetermined. The labyrinth seal is configured so as to confront each other through the radial clearance.

一方、インナー側のシール１６は、互いに対向配置された環状のシール板１９とスリンガ２０とからなる、所謂パックシールで構成されている。シール板１９は、外方部材２の端部内周に圧入された芯金２１と、この芯金２１に加硫接着により一体に接合されたシール部材２２とからなる。芯金２１は、オーステナイト系ステンレス鋼鈑（ＪＩＳ規格のＳＵＳ３０４系等）や防錆処理された冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系等）等の防錆能を有する鋼板からプレス加工にて断面略Ｌ字状に形成されている。   On the other hand, the inner seal 16 is a so-called pack seal composed of an annular seal plate 19 and a slinger 20 which are arranged to face each other. The seal plate 19 includes a cored bar 21 that is press-fitted into the inner periphery of the end of the outer member 2 and a seal member 22 that is integrally joined to the cored bar 21 by vulcanization adhesion. The core metal 21 is formed by pressing from a steel plate having rust prevention ability, such as an austenitic stainless steel plate (JIS standard SUS304, etc.) or a rust-proof cold rolled steel plate (JIS standard SPCC, etc.). The cross section is substantially L-shaped.

シール部材２２はＮＢＲ等の合成ゴムからなり、径方向外方に傾斜して延びるサイドリップ２２ａと、二股状に形成されたグリースリップ２２ｂとダストリップ２２ｃとを有している。   The seal member 22 is made of a synthetic rubber such as NBR, and includes a side lip 22a extending obliquely outward in the radial direction, a grease lip 22b and a dust lip 22c formed in a bifurcated shape.

一方、スリンガ２０は、フェライト系のステンレス鋼鈑（ＪＩＳ規格のＳＵＳ４３０系等）、オーステナイト系ステンレス鋼鈑（ＪＩＳ規格のＳＵＳ３０４系等）、あるいは防錆処理された冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系等）等の防錆能を有する鋼板からプレス加工によって断面略Ｌ字状に形成され、内輪５の肩部７に圧入される円筒部２０ａと、この円筒部２０ａから径方向外方に延びる立板部２０ｂとを備えている。そして、シール部材２２のサイドリップ２２ａが立板部２０ｂに所定の軸方向シメシロを介して摺接されると共に、グリースリップ２２ｂとダストリップ２２ｃが円筒部２０ａに所定の径方向シメシロを介して摺接されている。さらに、スリンガ２０における立板部２０ｂは、シール板１９と僅かな径方向すきまを介して対峙し、ラビリンスシールが構成されている。   On the other hand, the slinger 20 is a ferritic stainless steel plate (JIS standard SUS430 or the like), an austenitic stainless steel plate (JIS standard SUS304 type or the like), or a rust-proof cold rolled steel plate (JIS standard). A cylindrical portion 20a that is formed into a substantially L-shaped cross section by pressing from a steel plate having anticorrosive ability, such as a SPCC system, etc., and is press-fitted into the shoulder 7 of the inner ring 5, and radially outward from the cylindrical portion 20a. And an upright plate portion 20b. The side lip 22a of the seal member 22 is slidably contacted with the upright plate portion 20b via a predetermined axial nip, and the grease lip 22b and the dust lip 22c are slid onto the cylindrical portion 20a via a predetermined radial nip. It is touched. Further, the standing plate portion 20b of the slinger 20 is opposed to the seal plate 19 through a slight radial clearance to form a labyrinth seal.

ハブ輪４は、炭素量が比較的少ないＳＣｒ４２０やＳＣＭ４１５等の浸炭鋼からなる板材またはパイプ材を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）によって形成されている。具体的には、パイプ材からプレス加工および冷間のローリング加工によって形成されている。また、塑性加工でバリが発生する両端面は加工後に旋削加工されるか、必要に応じて研削加工が施される。そして、浸炭焼入れによって表面硬さを５０〜６４ＨＲＣの範囲に硬化処理されている。なお、加締部４ｄは、防浸炭により素材硬さの生のままとされている。さらに、内側転走面４ａが研削加工によって所定の寸法、精度に形成されている。その後、必要に応じて超仕上げ加工が施される。これにより、車輪取付フランジ６に負荷される回転曲げ荷重に対して充分な機械的強度を有し、小径段部４ｃの耐フレッティング性が向上してハブ輪４の耐久性が一段と向上すると共に、微小なクラック等の発生がなく加締部４ｄの塑性加工をスムーズに行うことができる。   The hub ring 4 is formed by pressing or cold rolling (hereinafter referred to as plastic working) a plate material or pipe material made of carburized steel such as SCr420 or SCM415 having a relatively small amount of carbon. Specifically, it is formed from a pipe material by pressing and cold rolling. Further, both end faces where burrs are generated by plastic working are turned after the machining, or are ground if necessary. And the surface hardness is hardened in the range of 50 to 64 HRC by carburizing and quenching. Note that the caulking portion 4d is kept raw in raw material hardness by carburization prevention. Further, the inner rolling surface 4a is formed with a predetermined size and accuracy by grinding. Thereafter, superfinishing is performed as necessary. Thereby, it has sufficient mechanical strength with respect to the rotational bending load applied to the wheel mounting flange 6, the fretting resistance of the small diameter step portion 4c is improved, and the durability of the hub wheel 4 is further improved. Further, there is no occurrence of minute cracks and the like, and the plastic working of the crimped portion 4d can be performed smoothly.

ハブ輪４の材質としてこれ以外にも、ＳＣＭ４４０等の浸炭鋼、あるいは冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系等）やＳ４５Ｃ等の炭素鋼を例示することができる。冷間圧延鋼鈑や炭素鋼の場合、内側転走面４ａをはじめ、アウター側のシール１５のシールランド部となる基部６ｃから小径段部４ｃに亙って高周波焼入れによって表面硬さを５０〜６４ＨＲＣの範囲に硬化処理が施される。   In addition to this, examples of the material of the hub wheel 4 include carburized steel such as SCM440, cold rolled steel (such as JIS standard SPCC), and carbon steel such as S45C. In the case of cold rolled steel or carbon steel, the surface hardness is set to 50 to 50 by induction hardening from the inner rolling surface 4a to the small diameter step 4c from the base 6c which becomes the seal land portion of the seal 15 on the outer side. A hardening process is performed in the range of 64 HRC.

外方部材２は、ＳＣｒ４２０やＳＣＭ４１５等の浸炭鋼からなる板材およびパイプ材から塑性加工によって形成されている。具体的には、パイプ材からプレス加工および冷間のローリング加工によって形成されている。そして、浸炭焼入れによって表面硬さを５０〜６４ＨＲＣの範囲に硬化処理されている。外方部材２の材質として、これ以外にも、ＳＣＭ４４０等の浸炭鋼、あるいは冷間圧延鋼鈑やＳ４５Ｃ等の炭素鋼を例示することができる。冷間圧延鋼鈑や炭素鋼の場合、少なくとも外方部材２の複列の外側転走面２ａ、２ａが高周波焼入れによって表面硬さを５０〜６４ＨＲＣの範囲に硬化処理が施されている。そして、複列の外側転走面２ａ、２ａが研削加工によって所定の寸法、精度に形成されている。なお、その後、必要に応じて超仕上げ加工が施される。   The outer member 2 is formed by plastic working from a plate material and pipe material made of carburized steel such as SCr420 and SCM415. Specifically, it is formed from a pipe material by pressing and cold rolling. And the surface hardness is hardened in the range of 50 to 64 HRC by carburizing and quenching. Other examples of the material of the outer member 2 include carburized steel such as SCM440, or cold rolled steel or carbon steel such as S45C. In the case of cold-rolled steel or carbon steel, at least the double row outer raceway surfaces 2a and 2a of the outer member 2 are hardened by induction hardening in a range of 50 to 64 HRC. The double row outer rolling surfaces 2a, 2a are formed with predetermined dimensions and accuracy by grinding. After that, superfinishing is performed as necessary.

内輪５は、ＳＵＪ２等の軸受鋼やＳＣｒ４２０やＳＣＭ４１５等の浸炭鋼からなるパイプ材から塑性加工によって形成されている。そして、ズブ焼入れや浸炭焼入れによって表面硬さを５０〜６４ＨＲＣの範囲に硬化処理されている。さらに、内側転走面５ａが研削加工によって所定の寸法、精度に形成されている。なお、その後、必要に応じて超仕上げ加工が施される。内輪５の材質としてこれ以外にも、ＳＣＭ４４０等の浸炭鋼、あるいは冷間圧延鋼鈑やＳ４５Ｃ等の炭素鋼を例示することができる。冷間圧延鋼鈑や炭素鋼の場合、少なくとも内側転走面５ａが高周波焼入れによって表面硬さを５０〜６４ＨＲＣの範囲に硬化処理が施されている。   The inner ring 5 is formed by plastic working from a pipe material made of bearing steel such as SUJ2 or carburized steel such as SCr420 or SCM415. And the surface hardness is hardened in the range of 50 to 64 HRC by submerged quenching or carburizing quenching. Further, the inner rolling surface 5a is formed with a predetermined size and accuracy by grinding. After that, superfinishing is performed as necessary. In addition to this, examples of the material of the inner ring 5 include carburized steel such as SCM440, or cold rolled steel or carbon steel such as S45C. In the case of a cold rolled steel plate or carbon steel, at least the inner rolling surface 5a is subjected to a hardening process in a range of 50 to 64 HRC by induction hardening.

このように、本実施形態では、ハブ輪４と内輪５および外方部材２が板材またはパイプ材から塑性加工によって形成されているので、軽量・コンパクト化と共に、軸受の強度・耐久性の向上を図った車輪用軸受装置を提供することができる。   As described above, in the present embodiment, the hub wheel 4, the inner ring 5, and the outer member 2 are formed by plastic working from a plate material or a pipe material, so that the strength and durability of the bearing can be improved with light weight and compactness. The illustrated wheel bearing device can be provided.

ここで、ハブ輪４の車輪取付フランジ６は、ハブ輪４のアウター側の端部に花弁状に突設されたフランジ本体２３と、このフランジ本体２３に接合された補強板２４とで構成されている。この補強板２４は、ＳＣＭ４４０等の浸炭鋼、あるいは冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系等）やＳ４５Ｃ等の炭素鋼からプレス加工によって形成され、フランジ本体２３の肉厚に対し、７０〜７５％程度の肉厚からなる鋼鈑が使用されている。これにより、ハブ輪４の軽量化を図りつつ、車輪取付フランジ６の強度・剛性を高めることができ、大きなモーメント荷重がこの車輪取付フランジ６に負荷されても耐久性を確保することができる。   Here, the wheel mounting flange 6 of the hub wheel 4 is composed of a flange main body 23 projecting in a petal shape at the outer end of the hub wheel 4 and a reinforcing plate 24 joined to the flange main body 23. ing. The reinforcing plate 24 is formed by press working from carburized steel such as SCM440, cold rolled steel plate (JIS standard SPCC system, etc.) or carbon steel such as S45C. Steel plates with a wall thickness of about 75% are used. Accordingly, the strength and rigidity of the wheel mounting flange 6 can be increased while reducing the weight of the hub wheel 4, and durability can be ensured even when a large moment load is applied to the wheel mounting flange 6.

補強板２４は、フランジ本体２３のアウター側の側面２３ａに当接するフランジ部２４ａと、このフランジ部２４ａから軸方向に延び、車輪およびブレーキロータ（図示せず）をガイドする円筒状のパイロット部２４ｂを備えている。また、フランジ部２４ａの外径部にはインロウ部２５が突設され、フランジ本体２３の外径に所定の嵌合すきまを介して外嵌されている。このインロウ部２５によってハブ輪４と補強板２４との芯出し精度を高めることができる。   The reinforcing plate 24 includes a flange portion 24a that contacts the outer side surface 23a of the flange body 23, and a cylindrical pilot portion 24b that extends in the axial direction from the flange portion 24a and guides a wheel and a brake rotor (not shown). It has. In addition, an in-row part 25 projects from the outer diameter part of the flange part 24a, and is fitted on the outer diameter of the flange body 23 via a predetermined fitting clearance. The centering accuracy between the hub wheel 4 and the reinforcing plate 24 can be increased by the inrow portion 25.

次に、図３を用いて車輪取付フランジ６の加工工程について詳細に説明する。
（ａ）は孔開け工程であって、フランジ本体２３と補強板２４が接合された状態で、補強板２４が下方に位置するように、基台（ダイス）２６上にハブ輪４が載置され、周方向等配にボルト挿通孔２７がインナー側（フランジ本体２３側）から打ち抜き加工によって穿設される。この打ち抜き加工は、周方向等配に孔開けピン２８ａが突設された打ち抜き工具（パンチ）２８によって行われる。ここで、打ち抜き加工をアウター側（補強板２４側）から行っても良いが、孔開けピン２８ａの出口側が破断面となり、打ち抜きによるバリが発生してハブボルト６ａの座面に盛り上がり部が生じて好ましくない。本実施形態のように、打ち抜き加工が、インナー側（フランジ本体２３側）から打ち抜き加工によって行われることにより、孔開けピン２８ａの入口の破面がせん断面となり、有害なバリ等の発生を防止することができる。 Next, the processing steps of the wheel mounting flange 6 will be described in detail with reference to FIG.
(A) is a drilling step, and the hub wheel 4 is placed on the base (die) 26 so that the reinforcing plate 24 is positioned below in a state where the flange main body 23 and the reinforcing plate 24 are joined. Then, the bolt insertion holes 27 are bored from the inner side (flange main body 23 side) by punching processing at equal intervals in the circumferential direction. This punching process is performed by a punching tool (punch) 28 in which perforated pins 28a are provided so as to be equidistant in the circumferential direction. Here, although punching may be performed from the outer side (reinforcing plate 24 side), the exit side of the perforated pin 28a has a broken surface, and burrs are generated by punching, resulting in a raised portion on the seating surface of the hub bolt 6a. It is not preferable. As in this embodiment, the punching process is performed by punching from the inner side (flange body 23 side), so that the fracture surface at the entrance of the perforated pin 28a becomes a sheared surface, thereby preventing the occurrence of harmful burrs and the like. can do.

そして、（ｂ）に示す面押し工程では、補強板２４が上方に位置するように、基台２６上にハブ輪４が載置され、周方向等配に面押しピン２９ａが突設された面押し工具２９によってアウター側（補強板２４側）から面押し加工が行われる。面押しピン２９ａはボルト挿通孔２７よりも僅かに小径に設定され、その基部３０には３０〜６０°の範囲に設定されたテーパ面が形成され、面押しピン２９ａをボルト挿通孔２７に挿通させることにより、補強板２４側のボルト挿通孔２７の縁部に所定の面取り部２７ａがプレス加工によって形成される。これにより、作業効率が向上して低コスト化を図ることができる。なお、ハブ輪４を反転させ、同様に、フランジ本体２３側のボルト挿通孔２７の縁部に所定の面取り部２７ａがプレス加工によって形成される。   Then, in the surface pressing step shown in (b), the hub wheel 4 is placed on the base 26 so that the reinforcing plate 24 is positioned above, and the surface pressing pins 29a are projected in the circumferential direction. Surface pressing is performed from the outer side (reinforcement plate 24 side) by the surface pressing tool 29. The surface pressing pin 29 a is set to have a slightly smaller diameter than the bolt insertion hole 27, and a tapered surface set in a range of 30 to 60 ° is formed on the base 30, and the surface pressing pin 29 a is inserted into the bolt insertion hole 27. By doing so, a predetermined chamfered portion 27a is formed by pressing at the edge of the bolt insertion hole 27 on the reinforcing plate 24 side. Thereby, work efficiency can improve and cost reduction can be achieved. In addition, the hub wheel 4 is reversed, and similarly, a predetermined chamfered portion 27a is formed by pressing at the edge of the bolt insertion hole 27 on the flange body 23 side.

このように、本実施形態では、ハブ輪４の車輪取付フランジ６が、フランジ本体２３と、これに接合された補強板２４とで構成され、ハブ輪４のフランジ本体２３と補強板２４のフランジ部２４ａを一体に重ね合わせた状態でボルト挿通孔２７の打ち抜き加工および面押し加工が行われているので、ハブボルト６ａの圧入幅を確保することができ、長期間に亘ってハブボルト６ａが緩むのを防止して固定力を高めることができると共に、車輪取付フランジ６がフランジ本体２３と補強板２４の別体であってもボルト挿通孔２７の寸法・位置精度が向上する。したがって、ハブボルト６ａの圧入作業が効率良く行われ、ハブボルト６ａが傾いて圧入固定されることはない。   As described above, in this embodiment, the wheel mounting flange 6 of the hub wheel 4 includes the flange main body 23 and the reinforcing plate 24 joined thereto, and the flange main body 23 of the hub wheel 4 and the flange of the reinforcing plate 24. Since the punching process and the surface pressing process of the bolt insertion hole 27 are performed in a state where the portions 24a are integrally overlapped, the press-fitting width of the hub bolt 6a can be secured, and the hub bolt 6a is loosened over a long period of time. Can be prevented and the fixing force can be increased, and even if the wheel mounting flange 6 is a separate body of the flange main body 23 and the reinforcing plate 24, the dimensions and position accuracy of the bolt insertion holes 27 are improved. Therefore, the press-fitting work of the hub bolt 6a is performed efficiently, and the hub bolt 6a is not tilted and fixed.

また、本実施形態では、図１に示すように、外方部材２の車体取付フランジ１０が、インナー側の端部に花弁状に突設されたフランジ本体３１と、このフランジ本体３１に接合された補強板３２とで構成されている。この補強板３２は、ＳＣＭ４４０等の浸炭鋼、あるいは冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系等）やＳ４５Ｃ等の炭素鋼からプレス加工によって形成され、フランジ本体３１の肉厚に対し、７０〜７５％程度の肉厚からなる鋼鈑が使用されている。これにより、外方部材２の軽量化を図りつつ、車体取付フランジ１０の強度・剛性を高めることができ、大きなモーメント荷重がこの車体取付フランジ１０に負荷されても耐久性を確保することができる。   In the present embodiment, as shown in FIG. 1, the vehicle body mounting flange 10 of the outer member 2 is joined to a flange main body 31 projecting in a petal shape at an end on the inner side, and the flange main body 31. And a reinforcing plate 32. The reinforcing plate 32 is formed by press working from carburized steel such as SCM440, cold rolled steel plate (JIS standard SPCC system, etc.) or carbon steel such as S45C. Steel plates with a wall thickness of about 75% are used. Accordingly, the strength and rigidity of the vehicle body mounting flange 10 can be increased while reducing the weight of the outer member 2, and durability can be ensured even when a large moment load is applied to the vehicle body mounting flange 10. .

補強板３２は、フランジ本体３１のインナー側の側面３１ａに当接するフランジ部３２ａと、このフランジ部３２ａから軸方向に延び、ナックル（図示せず）に嵌合される円筒状のパイロット部３２ｂとを備えている。また、フランジ部３２ａの外径部にはインロウ部３３が突設され、フランジ本体３１の外径に所定の嵌合すきまを介して外嵌されている。このインロウ部３３によって外方部材２と補強板３２との芯出し精度を高めることができる。   The reinforcing plate 32 includes a flange portion 32a that contacts the side surface 31a on the inner side of the flange body 31, a cylindrical pilot portion 32b that extends in the axial direction from the flange portion 32a, and is fitted to a knuckle (not shown). It has. In addition, an in-row portion 33 projects from the outer diameter portion of the flange portion 32a, and is externally fitted to the outer diameter of the flange main body 31 through a predetermined fitting clearance. The centering accuracy between the outer member 2 and the reinforcing plate 32 can be increased by the inrow portion 33.

ここで、外方部材２のフランジ本体３１と補強板３２のフランジ部３２ａを一体に重ね合わせた状態でボルト下孔の打ち抜き加工および面押し加工が行われている。これにより、固定ボルト（図示せず）の圧入幅を確保することができ、長期間に亘って固定ボルトが緩むのを防止して固定力を高めることができると共に、車体取付フランジ１０がフランジ本体３１と補強板３２の別体であってもボルト下孔の寸法・位置精度が向上する。   Here, punching and surface pressing of the bolt lower hole are performed in a state where the flange main body 31 of the outer member 2 and the flange portion 32a of the reinforcing plate 32 are integrally overlapped. Accordingly, it is possible to secure a press-fitting width of a fixing bolt (not shown), to prevent the fixing bolt from loosening over a long period of time, and to increase the fixing force. Even if it is the separate body of 31 and the reinforcement board 32, the dimension and position accuracy of a bolt pilot hole will improve.

図４（ａ）は、本発明に係る車輪用軸受装置の第２の実施形態を示す正面図、（ｂ）は、（ａ）の要部断面図である。なお、この実施形態は、前述した実施形態（図１）と基本的には補強板の構成が一部異なるだけで、その他同一部品同一部位あるいは同様の機能を有する部品や部位には同じ符号を付して詳細な説明を省略する。   Fig.4 (a) is a front view which shows 2nd Embodiment of the wheel bearing apparatus which concerns on this invention, (b) is principal part sectional drawing of (a). Note that this embodiment is basically different from the above-described embodiment (FIG. 1) only in part of the configuration of the reinforcing plate, and the same reference numerals are used for the same parts or parts having the same functions. Detailed description will be omitted.

ハブ輪３４の車輪取付フランジ３５は、ハブ輪３４のアウター側の端部に花弁状に突設されたフランジ本体２３と、このフランジ本体２３に接合された補強板３６とで構成されている。この補強板３６は、ＳＣＭ４４０等の浸炭鋼、あるいは冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系等）やＳ４５Ｃ等の炭素鋼からプレス加工によって形成され、フランジ本体２３の肉厚に対し、７０〜７５％程度の肉厚からなる鋼鈑が使用されている。   The wheel mounting flange 35 of the hub wheel 34 includes a flange main body 23 projecting in a petal shape at the outer end of the hub wheel 34 and a reinforcing plate 36 joined to the flange main body 23. The reinforcing plate 36 is formed by press working from carburized steel such as SCM440, cold rolled steel plate (JIS standard SPCC system, etc.) or carbon steel such as S45C. Steel plates with a wall thickness of about 75% are used.

補強板３６は、フランジ本体２３のアウター側の側面２３ａに当接するフランジ部３６ａと、このフランジ部３６ａから軸方向に延びる円筒状のパイロット部２４ｂを備えている。また、フランジ部３６ａの外径部にはインロウ部２５が突設され、フランジ本体２３の外径に所定の嵌合すきまを介して外嵌されている。   The reinforcing plate 36 includes a flange portion 36a that contacts the outer side surface 23a of the flange main body 23, and a cylindrical pilot portion 24b that extends in an axial direction from the flange portion 36a. In addition, an in-row portion 25 is projected from the outer diameter portion of the flange portion 36a and is externally fitted to the outer diameter of the flange body 23 through a predetermined fitting clearance.

そして、前述した実施形態と同様、周方向等配にボルト挿通孔２７がインナー側（フランジ本体２３側）から打ち抜き加工によって穿設されると共に、面押し工具によって面押し加工が行われ、ボルト挿通孔２７の縁部に所定の面取り部２７ａがプレス加工によって形成される。   As in the above-described embodiment, the bolt insertion holes 27 are bored from the inner side (flange body 23 side) by punching in the circumferential direction, and surface pressing is performed by a surface pressing tool. A predetermined chamfered portion 27 a is formed at the edge of the hole 27 by press working.

また、面押し加工の後に、ブレーキロータ（図示せず）が当接される補強板３６のアウター側の側面３７に、ボルト挿通孔２７を包含する所定の幅からなる環状溝３８が切削加工によって形成されている。この環状溝３８を側面３７に形成することにより、ハブボルト（図示せず）の圧入による側面３７への変形等の影響を最小限に抑制できる。さらに、ハブボルトの圧入後、側面３７を二次切削すれば、ハブボルトの圧入によって増加した側面３７の面振れを可及的に抑制することができる。   In addition, after the surface pressing process, an annular groove 38 having a predetermined width including the bolt insertion hole 27 is formed on the outer side surface 37 of the reinforcing plate 36 with which the brake rotor (not shown) abuts by cutting. Is formed. By forming the annular groove 38 in the side surface 37, it is possible to minimize the influence of deformation or the like on the side surface 37 due to press-fitting of a hub bolt (not shown). Furthermore, if the side surface 37 is subjected to secondary cutting after press-fitting of the hub bolt, it is possible to suppress as much as possible the runout of the side surface 37 caused by press-fitting the hub bolt.

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、車輪取付フランジを一体に有するハブ輪と、このハブ輪に圧入される内輪とからなる内方部材を備えた車輪用軸受装置に適用できる。   The wheel bearing device according to the present invention can be applied to a wheel bearing device including an inner member including a hub ring integrally having a wheel mounting flange and an inner ring press-fitted into the hub ring.

１ 内方部材
２ 外方部材
２ａ 外側転走面
３ ボール
４、３４ ハブ輪
４ａ、５ａ 内側転走面
４ｂ、７ 肩部
４ｃ 小径段部
４ｄ 加締部
５ 内輪
６、３５ 車輪取付フランジ
６ａ ハブボルト
６ｂ 円孔
６ｃ、３０ 基部
８ 内輪の大端部
９ 内輪の小端部
１０ 車体取付フランジ
１１ 環状凸部
１２、１３ 嵌合部
１４ 保持器
１５ アウター側のシール
１６ インナー側のシール
１７、２１ 芯金
１８、２２ シール部材
１８ａ、２２ａ サイドリップ
１８ｂ、２２ｃ ダストリップ
１８ｃ、２２ｂ グリースリップ
１９ シール板
２０ スリンガ
２０ａ 円筒部
２０ｂ 立板部
２３、３１ フランジ本体
２３ａ フランジ本体のアウター側の側面
２４、３２、３６ 補強板
２４ａ、３２ａ、３６ａ フランジ部
２４ｂ、３２ｂ パイロット部
２５、３３ インロウ部
２６ 基台
２７ ボルト挿通孔
２７ａ 面取り部
２８ 打ち抜き工具
２８ａ 孔開けピン
２９ 面押し工具
２９ａ 面押しピン
３１ａ フランジ本体のインナー側の側面
３７ フランジ部のアウター側の側面
３８ 環状溝
５０ 車輪用軸受装置
５１ ハブ輪
５１ａ、５８ａ 内側転走面
５２ 複列アンギュラ玉軸受
５３ 軸部
５３ａ 小径段部
５４、６１ 切り起し片
５５、６２ 舌片
５５ａ 膨出部
５６ ハブボルト
５７ 外方部材
５７ａ 外側転走面
５８ 内輪
５９ 保持器
６０ ボール DESCRIPTION OF SYMBOLS 1 Inner member 2 Outer member 2a Outer rolling surface 3 Ball | bowl 4, 34 Hub wheel 4a, 5a Inner rolling surface 4b, 7 Shoulder part 4c Small diameter step part 4d Clamping part 5 Inner ring 6, 35 Wheel mounting flange 6a Hub bolt 6b Circular holes 6c, 30 Base 8 Large end portion 9 of inner ring Small end portion 10 of inner ring Car body mounting flange 11 Annular convex portions 12, 13 Fitting portion 14 Cage 15 Outer side seal 16 Inner side seal 17, 21 core Gold 18, 22 Seal member 18a, 22a Side lip 18b, 22c Dustrip 18c, 22b Grease lip 19 Seal plate 20 Slinger 20a Cylindrical portion 20b Standing plate portion 23, 31 Flange body 23a Side surface 24, 32 on the outer side of the flange body 36 Reinforcing plates 24a, 32a, 36a Flange portions 24b, 32b Pilot portions 25, 33 Inrow portions 26 Base 27 Bo G Insert hole 27a Chamfer 28 Punching tool 28a Drilling pin 29 Surface pressing tool 29a Surface pressing pin 31a Flange body inner side 37 Flange outer side 38 Flange 50 Wheel bearing device 51 Hub wheel 51a, 58a Inner rolling surface 52 Double row angular contact ball bearing 53 Shaft portion 53a Small diameter step portion 54, 61 Cut and raised pieces 55, 62 Tongue piece 55a Swelling portion 56 Hub bolt 57 Outer member 57a Outer rolling surface 58 Inner ring 59 Cage 60 balls

Claims (10)

内周に複列の円弧状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、外周に前記複列の転走面の一方に対向する円弧状の内側転走面と、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円弧状の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ボールと、
前記外方部材と内方部材との間に形成された環状空間の両端開口部に装着されたシールとを備え、
前記小径段部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、前記ハブ輪に対して前記内輪が軸方向に固定された車輪用軸受装置において、
前記ハブ輪と内輪および外方部材が板材またはパイプ材から塑性加工によって形成され、前記車輪取付フランジが、前記ハブ輪のアウター側の端部に花弁状に突設されたフランジ本体と、このフランジ本体に接合された補強板とで構成され、この補強板が板材から塑性加工によって形成され、前記フランジ本体のアウター側の側面に当接するフランジ部と、このフランジ部から軸方向に延び、前記車輪およびブレーキロータをガイドする円筒状のパイロット部を備えると共に、前記フランジ部の外径部にインロウ部が突設され、前記フランジ本体の外径に所定の嵌合すきまを介して外嵌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 arc-shaped outer rolling surface is integrally formed on the inner periphery;
A wheel mounting flange for mounting the wheel on the outer end is integrated, and an arcuate inner rolling surface facing one of the double row rolling surfaces on the outer periphery, and an axis extending from the inner rolling surface. A hub wheel formed with a cylindrical small-diameter step portion extending in the direction, and a circle that is press-fitted into the small-diameter step portion of the hub wheel through a predetermined shimoshiro and that opposes the other of the double-row outer rolling surfaces on the outer periphery An inner member composed of an inner ring formed with an arc-shaped inner rolling surface;
A double row of balls accommodated between the rolling surfaces of the inner member and the outer member via a retainer between the rolling surfaces;
A seal mounted at both ends of an annular space formed between the outer member and the inner member;
In the wheel bearing device in which the inner ring is fixed in the axial direction with respect to the hub wheel by a crimping portion formed by plastically deforming an end portion of the small-diameter stepped portion radially outwardly,
A flange main body in which the hub ring, the inner ring, and the outer member are formed by plastic working from a plate material or a pipe material, and the wheel mounting flange is protruded in a petal shape at the outer end of the hub wheel, and the flange A reinforcing plate joined to the main body, the reinforcing plate is formed from a plate material by plastic working, a flange portion that contacts the side surface on the outer side of the flange main body, and extends in the axial direction from the flange portion, the wheel And a cylindrical pilot portion that guides the brake rotor, and an inlay portion that protrudes from the outer diameter portion of the flange portion, and is fitted on the outer diameter of the flange body via a predetermined fitting clearance. A wheel bearing device characterized by that. 前記車輪取付フランジの周方向等配にボルト挿通孔が打ち抜き加工によって穿設されると共に、当該ボルト挿通孔の縁部に所定の面取り部がプレス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 according to claim 1, wherein bolt insertion holes are formed by punching at equal intervals in the circumferential direction of the wheel mounting flange, and a predetermined chamfered portion is formed by pressing at an edge of the bolt insertion hole. Bearing device. 前記補強板の肉厚が、前記フランジ本体の肉厚に対し７０〜７５％程度の肉厚に設定されている請求項１または２に記載の車輪用軸受装置。   The wheel bearing device according to claim 1 or 2, wherein a thickness of the reinforcing plate is set to about 70 to 75% of a thickness of the flange main body. 前記補強板のアウター側の側面に、前記ボルト挿通孔を包含する所定の幅からなる環状溝が切削加工によって形成されている請求項１乃至３いずれかに記載の車輪用軸受装置。   The wheel bearing device according to any one of claims 1 to 3, wherein an annular groove having a predetermined width including the bolt insertion hole is formed on a side surface on the outer side of the reinforcing plate by cutting. 前記ボルト挿通孔にハブボルトを圧入後、前記補強板のアウター側の側面が二次切削されている請求項１乃至４いずれかに記載の車輪用軸受装置。   The wheel bearing device according to any one of claims 1 to 4, wherein after the hub bolt is press-fitted into the bolt insertion hole, the outer side surface of the reinforcing plate is secondarily cut. 前記外方部材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を一体に有し、この車体取付フランジが、前記外方部材のインナー側の端部に花弁状に突設されたフランジ本体と、このフランジ本体に接合された補強板とで構成され、この補強板が板材から塑性加工によって形成され、前記フランジ本体のインナー側の側面に当接するフランジ部と、このフランジ部から軸方向に延び、前記ナックルに嵌合される円筒状のパイロット部とを備えると共に、前記フランジ部の外径部にインロウ部が突設され、前記フランジ本体の外径に所定の嵌合すきまを介して外嵌されている請求項１に記載の車輪用軸受装置。   A flange body that integrally has a vehicle body mounting flange to be attached to a knuckle on the outer periphery of the outer member, and the vehicle body mounting flange protrudes in a petal shape at an end on the inner side of the outer member; A reinforcing plate joined to the flange main body, the reinforcing plate is formed from a plate material by plastic working, and a flange portion that contacts the side surface on the inner side of the flange main body, and extends axially from the flange portion, And a cylindrical pilot portion that is fitted to the knuckle, and an in-row portion projects from the outer diameter portion of the flange portion, and is fitted to the outer diameter of the flange body via a predetermined fitting clearance. The wheel bearing device according to claim 1. 前記補強板の肉厚が、前記フランジ本体の肉厚に対し７０〜７５％程度の肉厚に設定されている請求項６に記載の車輪用軸受装置。   The wheel bearing device according to claim 6, wherein a thickness of the reinforcing plate is set to about 70 to 75% of a thickness of the flange main body. 内周に複列の円弧状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、外周に前記複列の転走面の一方に対向する円弧状の内側転走面と、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円弧状の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ボールと、
前記外方部材と内方部材との間に形成された環状空間の両端開口部に装着されたシールとを備え、
前記小径段部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、前記ハブ輪に対して前記内輪が軸方向に固定された車輪用軸受装置の製造方法において、
前記ハブ輪と内輪および外方部材が板材またはパイプ材から塑性加工によって形成され、前記車輪取付フランジが、前記ハブ輪のアウター側の端部に花弁状に突設されたフランジ本体と、このフランジ本体に接合された補強板とで構成され、この補強板が板材から塑性加工によって形成され、前記フランジ本体のアウター側の側面に当接するフランジ部と、このフランジ部から軸方向に延び、前記車輪およびブレーキロータをガイドする円筒状のパイロット部を備えると共に、前記フランジ部の外径部にインロウ部が突設され、前記フランジ本体の外径に所定の嵌合すきまを介して外嵌され、前記フランジ本体と補強板が接合された状態で、周方向等配にボルト挿通孔が打ち抜き加工によって穿設されることを特徴とする車輪用軸受装置の製造方法。 An outer member in which a double-row arc-shaped outer rolling surface is integrally formed on the inner periphery;
A wheel mounting flange for mounting the wheel on the outer end is integrated, and an arcuate inner rolling surface facing one of the double row rolling surfaces on the outer periphery, and an axis extending from the inner rolling surface. A hub wheel formed with a cylindrical small-diameter step portion extending in the direction, and a circle that is press-fitted into the small-diameter step portion of the hub wheel through a predetermined shimoshiro and that opposes the other of the double-row outer rolling surfaces on the outer periphery An inner member composed of an inner ring formed with an arc-shaped inner rolling surface;
A double row of balls accommodated between the rolling surfaces of the inner member and the outer member via a retainer between the rolling surfaces;
A seal mounted at both ends of an annular space formed between the outer member and the inner member;
In the method of manufacturing a wheel bearing device in which the inner ring is fixed in the axial direction with respect to the hub wheel by a crimping portion formed by plastically deforming an end portion of the small-diameter stepped portion radially outward.
A flange main body in which the hub ring, the inner ring, and the outer member are formed by plastic working from a plate material or a pipe material, and the wheel mounting flange is protruded in a petal shape at the outer end of the hub wheel, and the flange A reinforcing plate joined to the main body, the reinforcing plate is formed from a plate material by plastic working, a flange portion that contacts the side surface on the outer side of the flange main body, and extends in the axial direction from the flange portion, the wheel And a cylindrical pilot portion that guides the brake rotor, and an inrow portion that protrudes from the outer diameter portion of the flange portion, and is externally fitted to the outer diameter of the flange body through a predetermined fitting clearance, In a state where the flange main body and the reinforcing plate are joined, a bolt insertion hole is formed by punching in a circumferentially uniform distribution. Method. 前記ボルト挿通孔が前記フランジ本体側から打ち抜き加工によって穿設される請求項８に記載の車輪用軸受装置の製造方法。   The method for manufacturing a wheel bearing device according to claim 8, wherein the bolt insertion hole is formed by punching from the flange body side. 前記外方部材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を一体に有し、この車体取付フランジが、前記外方部材のインナー側の端部に花弁状に突設されたフランジ本体と、このフランジ本体に接合された補強板とで構成され、この補強板が板材から塑性加工によって形成され、前記フランジ本体のインナー側の側面に当接するフランジ部と、このフランジ部から軸方向に延び、前記ナックルに嵌合される円筒状のパイロット部とを備えると共に、前記フランジ部の外径部にインロウ部が突設され、前記フランジ本体の外径に所定の嵌合すきまを介して外嵌され、前記フランジ本体と補強板のフランジ部を一体に重ね合わせた状態でボルト下孔の打ち抜き加工が行われる請求項８に記載の車輪用軸受装置の製造方法。   A flange body that integrally has a vehicle body mounting flange to be attached to a knuckle on the outer periphery of the outer member, and the vehicle body mounting flange protrudes in a petal shape at an end on the inner side of the outer member; A reinforcing plate joined to the flange main body, the reinforcing plate is formed from a plate material by plastic working, and a flange portion that contacts the side surface on the inner side of the flange main body, and extends axially from the flange portion, And a cylindrical pilot portion that is fitted to the knuckle, and an in-row portion projects from the outer diameter portion of the flange portion, and is fitted to the outer diameter of the flange body via a predetermined fitting clearance. The method for manufacturing a wheel bearing device according to claim 8, wherein punching of the bolt lower hole is performed in a state where the flange main body and the flange portion of the reinforcing plate are integrally overlapped.
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