JP2005289319A - Bearing device for wheel - Google Patents

Bearing device for wheel Download PDF

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JP2005289319A
JP2005289319A JP2004111467A JP2004111467A JP2005289319A JP 2005289319 A JP2005289319 A JP 2005289319A JP 2004111467 A JP2004111467 A JP 2004111467A JP 2004111467 A JP2004111467 A JP 2004111467A JP 2005289319 A JP2005289319 A JP 2005289319A
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Prior art keywords
wheel
hub
bolt insertion
bearing device
vehicle body
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JP2004111467A
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Japanese (ja)
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Yasuhiro Aritake
恭大 有竹
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2004111467A priority Critical patent/JP2005289319A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for a wheel which achieves weight reduction and compactification, and improves strength and durability of a hub wheel under conditions of a rotary bending load. <P>SOLUTION: A wheel mounting arm 6 in a hub wheel 1 is formed by implanting a hub bolt 6a for fastening a wheel to the tip, notching a part excluding a vicinity of a through hole 6b of the hub bolt 6a, and radially protruding from an annular base, wherein a chamfer 27 by cutting is formed on an outer edge of a side surface 25 of an outboard side. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

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、耐久性の向上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 is lighter and more compact and has improved durability.

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、低コスト化は言うまでもなく、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、それと共に車輪を回転自在に支承する車輪用軸受装置においては、この軽量化と一面では相反する信頼性と耐久性を向上させ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, among vehicles such as automobiles, light vehicles such as light four-wheel vehicles or small cars are not only cost-reduced, but demands for this weight reduction are increasing. There are various proposals related to wheel bearing devices that have been made lighter in the past. However, in the wheel bearing device that supports the wheel in a freely rotatable manner, reliability and durability contradicting this weight reduction in one aspect. Improving the performance is also an important factor.

図５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ある。   FIG. 5 shows an example of a wheel bearing device that is used in an automobile and is reduced in weight. This wheel bearing device is a typical structure used on the drive wheel side.

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、その外周に車輪用軸受装置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 is formed by forging to form a hollow structure, and integrally includes a wheel mounting flange 53 for mounting a wheel (not shown). One inner rolling surface 51a of the wheel bearing device 52 is provided on the outer periphery of the hub wheel 51. A cylindrical small diameter step portion 51b extending in the axial direction from the inner rolling surface 51a is formed, and a torque transmission spline 54 is formed on the inner periphery.

前記小径段部５１ｂには、車輪用軸受装置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 wheel bearing device 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、車輪用軸受装置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、車輪用軸受装置５２は、ハブ輪５１、内輪５５と外方部材５７と、両転走面５１ａ、５７ａ、５５ａ、５７ａ間に転動自在に収容された複列の転動体５９、５９とを備えている。   On the other hand, the outer member 57 constituting the wheel bearing device 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. Opposing double-row outer rolling surfaces 57a, 57a are formed. As described above, the wheel bearing device 52 includes the hub wheel 51, the inner ring 55, the outer member 57, and the double row rolling elements 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６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. 6, in the hub wheel 51, a bolt insertion hole 61 to which the hub bolt 53 a is fixed is formed in the wheel mounting flange 53, and the periphery of the bolt insertion hole 61 is avoided and the space between the bolt insertion holes 61 is avoided. , 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

しかしながら、このような従来の車輪用軸受装置のハブ輪５１において、ハブ輪５１の軽量化を図りつつ、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ものの、この車輪取付フランジ５３は、鍛造加工後にフランジ側面６６が旋盤等で切削加工されるため外縁部がエッジとなり、場合によってはバリ等が発生する恐れがある。車輪取付フランジ５３は車両の横旋回等により交番応力が発生する部位であるため、繰返し曲げモーメントが負荷されることによってこれらのエッジから切欠き効果で外縁部に応力集中が起こることになる。特に、スリム化を図ったこうしたハブ輪５１においては、こうした応力集中は致命的なものとなり、耐久性を著しく低下させることになって好ましくない。   However, in the hub wheel 51 of such a conventional wheel bearing device, the hub wheel 51 is reduced in weight and the bending rigidity of the wheel mounting flange 53 is prevented from being lowered. Since the flange side surface 66 is cut by a lathe after forging, the outer edge becomes an edge, and in some cases, burrs or the like may occur. Since the wheel mounting flange 53 is a portion where an alternating stress is generated due to the vehicle turning or the like, stress concentration occurs at the outer edge due to the notch effect from these edges when a repeated bending moment is applied. In particular, in such a hub wheel 51 that is slimmed down, such stress concentration becomes fatal, and the durability is remarkably lowered, which is not preferable.

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、軽量・コンパクト化を図ると共に、回転曲げ荷重の条件下での強度、耐久性を向上させ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 conventional problems, and provides a wheel bearing device that is light and compact and has improved strength and durability under the condition of rotational bending load. With the goal.

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が形成されると共に、少なくとも前記車輪取付フランジにおけるアウトボード側の側面の外縁部に面取りが形成されている構成を採用した。   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 ring having a cylindrical 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. In a wheel bearing device comprising: an inner member in which an inner rolling surface facing the outer rolling surface is formed; and a double-row rolling element that is accommodated so as to roll between both rolling surfaces; A notch is formed between the hub bolt insertion holes, avoiding the periphery of the hub bolt insertion holes perforated at equal circumferences of the wheel mounting flanges, from the pitch circle diameter of the hub bolt insertion holes to the inner diameter side, and at least The side surface on the outboard side of the wheel mounting flange Adopting a configuration in which chamfering is formed on the edge portion.

このように、車輪取付フランジの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が形成されると共に、少なくとも前記車輪取付フランジにおけるアウトボード側の側面の外縁部に面取りが形成されているので、この車輪取付アームに繰返し曲げモーメントが負荷されても外縁部に応力集中が起こることはなく、これらのバリあるいはエッジからクラックが発生するのを確実に防止し、ハブ輪の軽量化を図りつつ耐久性を向上させることができる。   In this way, a notch is formed between the hub bolt insertion holes, avoiding the periphery of the hub bolt insertion holes perforated on the circumference of the wheel mounting flange, from the pitch circle diameter of the hub bolt insertion holes to the inner diameter side. In addition, since chamfering is formed at least on the outer edge of the side surface on the outboard side of the wheel mounting flange, stress concentration does not occur at the outer edge even when a repeated bending moment is applied to the wheel mounting arm. It is possible to reliably prevent cracks from occurring on the burrs or edges, and to improve the durability while reducing the weight of the hub wheel.

好ましくは、請求項２に記載の発明のように、前記面取りが切削により形成されていれば、側面の外縁部に発生するバリあるいはエッジが切除され、面取りの表面を滑らかにできると共に、面取りの寸法バラツキを抑えることができ、確実に外縁部の応力集中を防止することができる。   Preferably, if the chamfer is formed by cutting as in the invention described in claim 2, burrs or edges generated on the outer edge of the side surface are cut off, and the surface of the chamfer can be smoothed. Variations in dimensions can be suppressed, and stress concentration at the outer edge can be reliably prevented.

また、請求項３に記載の発明は、前記車輪取付フランジは、前記ハブボルトの挿通孔の近傍を除く部分を切欠いて、当該ハブボルト挿通孔の形成部分と略同じ幅でもって、環状の基部から放射状に突出するように形成されていると共に、前記車輪取付フランジにおけるインボード側の側面が、その基部に向って漸次肉厚になるようにリブが形成されているので、ハブ輪の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, the wheel mounting flange is formed by notching a portion excluding the vicinity of the hub bolt insertion hole and having a width substantially the same as a portion where the hub bolt insertion hole is formed. And the ribs are formed so that the side surface on the inboard side of the wheel mounting flange gradually increases in thickness toward the base, so that the rigidity of the hub wheel is impaired. Can be achieved without weight reduction.

また、請求項４に記載の発明は、前記ハブ輪に、前記車輪取付フランジよりもアウトボード側に延びてブレーキロータの内径面を案内するブレーキパイロット部、およびこのブレーキロータパイロット部からさらにアウトボード側に延びてホイールの内径面を案内するホイールパイロット部が形成され、少なくとも前記ホイールパイロット部が、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るので、ハブ輪の剛性を低下させることなく軽量化を図ることができる。   According to a fourth aspect of the present invention, there is provided a brake pilot portion that extends toward the outboard side of the wheel mounting flange and guides the inner surface of the brake rotor to the hub wheel, and further outboards from the brake rotor pilot portion. A wheel pilot portion that extends to the side and guides the inner diameter surface of the wheel is formed, and at least the wheel pilot portion is provided with notches at a plurality of locations in the circumferential direction, and is intermittently formed in a protruding piece shape. Therefore, it is possible to reduce the weight without reducing the rigidity of the hub wheel.

また、請求項５に記載の発明は、前記外方部材が、外周に突出した環状の車体取付部を一体に有し、この車体取付部から放射状に延びる複数の車体取付アームが形成され、これら車体取付アームの端部にそれぞれナックルに固定されるボルト挿通孔が穿設されると共に、前記車体取付アームが、前記ボルト挿通孔の近傍を除く部分を切欠いて、当該ボルト挿通孔の形成部分と略同じ幅でもって、前記車体取付部から放射状に突出するように形成されているので、外方部材の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 fifth aspect of the present invention, the outer member integrally has an annular vehicle body mounting portion protruding outward, and a plurality of vehicle body mounting arms extending radially from the vehicle body mounting portion are formed. Bolt insertion holes that are fixed to the knuckles are drilled at the end portions of the vehicle body mounting arm, and the vehicle body mounting arm is cut out at portions other than the vicinity of the bolt insertion holes, Since it has substantially the same width and is formed so as to protrude radially from the vehicle body mounting portion, weight reduction can be achieved without impairing the rigidity of the outer member.

また、請求項６に記載の発明は、少なくとも前記車体取付アームにおけるインボード側の側面の外縁部に面取りが形成されているので、外縁部に応力集中が起こることはなく、バリあるいはエッジからクラックが発生するのを防止し、外方部材の軽量化を図りつつ、耐久性を向上させることができる。   According to the sixth aspect of the present invention, since chamfering is formed at least on the outer edge portion of the side surface on the inboard side of the vehicle body mounting arm, stress concentration does not occur in the outer edge portion, and cracks occur from burrs or edges. Can be prevented, and the durability can be improved while reducing the weight of the outer member.

また、請求項７に記載の発明は、前記ハブ輪の外周に一方の内側転走面が形成され、前記小径段部に圧入された一つの内輪の外周に他方の内側転走面が形成されると共に、前記小径段部の端部を径方向外方に塑性変形させて加締部が形成され、この加締部により前記内輪が前記ハブ輪に対して軸方向に固定されているので、ハブ輪の剛性を増大させ、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と一層の軽量・コンパクト化を達成することができる。   According to the seventh aspect of the present invention, one inner rolling surface is formed on the outer periphery of the hub wheel, and the other inner rolling surface is formed on the outer periphery of one inner ring press-fitted into the small diameter step portion. In addition, a crimped portion is formed by plastically deforming the end portion of the small diameter step portion radially outward, and the inner ring is fixed in the axial direction with respect to the hub wheel by the crimped portion. The rigidity of the hub wheel can be increased, and the weight and size can be reduced. 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 in combination with the improvement of incorporation, cost reduction and further reduction in weight and compactness can be achieved.

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、前記車輪取付フランジの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が形成されると共に、少なくとも前記車輪取付フランジにおけるアウトボード側の側面の外縁部に面取りが形成されているので、この車輪取付フランジに繰返し曲げモーメントが負荷されても外縁部に応力集中が起こることはなく、これらのバリあるいはエッジからクラックが発生するのを確実に防止し、ハブ輪の軽量化を図りつつ耐久性を向上させることができる。   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. An inner rolling comprising a hub ring formed with an extending cylindrical small-diameter step portion and at least one inner ring press-fitted into the small-diameter step portion of the hub ring, and facing the double row outer rolling surface on the outer periphery. A hub bolt insertion hole provided with an inner member having a surface formed thereon and a double row rolling element that is rotatably accommodated between both rolling surfaces, and is formed in a circumferentially uniform manner on the wheel mounting flange A notch is formed between the hub bolt insertion holes to avoid the periphery of the hub bolt insertion hole from the pitch circle diameter of the hub bolt insertion hole to the inner diameter side, and chamfering is formed at least on the outer edge of the side surface on the outboard side of the wheel mounting flange. So this wheel mounting franc Even when repeated bending moments are applied, stress concentration does not occur at the outer edge, and it is possible to reliably prevent the occurrence of cracks from these burrs or edges and improve durability while reducing the weight of the hub wheel. be able to.

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の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が形成されると共に、少なくとも前記車輪取付フランジにおけるアウトボード側の側面の外縁部に面取りが形成されている。   An outer member having a double row outer rolling surface formed on the inner periphery, and a wheel mounting flange integrally formed on the end on the outboard side, and one of the outer members facing the double row outer rolling surface on the outer periphery. A hub ring formed with an inner rolling surface and a cylindrical small-diameter step portion extending in an axial direction from the inner rolling surface, and press-fitted into the small-diameter step portion of the hub ring, and the double row outer rolling A wheel bearing comprising: an inner member comprising an inner ring on which the other inner rolling surface facing the surface is formed; and a double-row rolling element housed between the rolling surfaces so as to freely roll. In the device, a notch is formed between the hub bolt insertion holes, avoiding the periphery of the hub bolt insertion holes drilled at equal circumferences of the wheel mounting flange, from the pitch circle diameter of the hub bolt insertion holes to the inner diameter side. And at least outside the side surface on the outboard side of the wheel mounting flange. Chamfering is formed on the part.

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の右側面図である。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トボード側（図面左側）、中央寄り側をインボード側（図面右側）という。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention, and FIG. 2 is a right side view of FIG. In the following description, the side closer to the outer side of the vehicle when assembled to the vehicle is referred to as the outboard side (left side in the drawing), and the side closer to the center is referred to as the inboard 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車輪用軸受装置であって、車輪用軸受装置２は、内方部材３と外方部材４、および両部材３、４間に転動自在に収容された複列の転動体（ボール）５、５とを備えている。ここで、内方部材３は、ハブ輪１と、このハブ輪１に圧入された内輪１０とを指す。   This wheel bearing device is a wheel bearing device that rotatably supports a driven wheel. The wheel bearing device 2 rolls between an inner member 3, an outer member 4, and both members 3, 4. A plurality of rolling elements (balls) 5 and 5 accommodated freely are provided. Here, the inner member 3 refers to the hub wheel 1 and the inner ring 10 press-fitted into the hub wheel 1.

ハブ輪１は、外周のアウトボード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６（以下、車輪取付アームと言う）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、後述するブレーキパイロット部１４から放射状に突出するように形成されている。さらに、車輪取付アーム６のインボード側の側面には、その基部に向って漸次肉厚になるようにリブ６ｃが形成されている。これにより、ハブ輪１の剛性を損なうことなく軽量化を達成することができる。   The hub wheel 1 integrally has a wheel mounting flange 6 (hereinafter referred to as a wheel mounting arm) that is divided into four radially extending at an end on the outer board side of the outer periphery. Hub bolts 6a for fastening the wheels are planted at the equidistant positions. The wheel mounting arm 6 is cut out at a portion other than the vicinity of the hub bolt insertion hole 6b and has a width substantially the same as the portion where each hub bolt insertion hole 6b is formed, and projects radially from an annular base, that is, a brake pilot portion 14 described later. It is formed to do. Furthermore, a rib 6c is formed on the side surface of the wheel mounting arm 6 on the inboard side so as to gradually increase in thickness toward the base portion. Thereby, weight reduction can be achieved without impairing the rigidity of the hub wheel 1.

なお、本実施形態では、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。   In the present embodiment, the wheel mounting formed by notching the 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 portion. Although the arm 6 has been exemplified, the present invention is not limited thereto, and a notch is formed between the hub bolt insertion holes so as to avoid the periphery of the hub bolt insertion hole and deeper than the pitch circle diameter of the hub bolt insertion hole to the inner diameter side, as in the past. It may be something like a wheel mounting flange.

また、ハブ輪１において、車輪取付アーム６のインボード側の外周には内側転走面１ａと、この内側転走面１ａから軸方向に延びる円筒状の小径段部７が形成され、この小径段部７に内輪１０が所定のシメシロを介して圧入されている。そして、小径段部７の端部を径方向外方に塑性変形させて加締部８が形成されている。内輪１０はこの加締部８によってハブ輪１に対して軸方向に固定され、所謂第３世代のセルフリテイン構造をなしている。したがって、ハブ輪１の剛性を増大させ、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と軽量・コンパク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、前記第３世代構造に限らず、例えば、ハブ輪に一対の内輪が圧入された、所謂第２世代構造であっても良い。   Further, in the hub wheel 1, an inner rolling surface 1a and a cylindrical small diameter step portion 7 extending in the axial direction from the inner rolling surface 1a are formed on the outer periphery of the wheel mounting arm 6 on the inboard side. An inner ring 10 is press-fitted into the stepped portion 7 through a predetermined shimoshiro. And the crimping part 8 is formed by plastically deforming the edge part of the small diameter step part 7 to radial direction outward. The inner ring 10 is fixed in the axial direction with respect to the hub wheel 1 by the caulking portion 8 to form a so-called third generation self-retained structure. Therefore, the rigidity of the hub wheel 1 can be increased, and the weight and size can be reduced. 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 in combination with the improvement of incorporation, low cost, light weight and compactness can be achieved. The wheel bearing according to the present invention is not limited to the third generation structure, and may be a so-called second generation structure in which a pair of inner rings are press-fitted into a hub ring, for example.

外方部材４の内周には複列の外側転走面４ａ、４ａが形成され、これら外側転走面４ａ、４ａに対向する内方部材３の内側転走面のうち一方の内側転走面１ａはハブ輪１に、他方の内側転走面１０ａは内輪１０の外周にそれぞれ形成されている。これら両転走面４ａ、１ａおよび４ａ、１０ａ間に複列の転動体５、５が収容され、これら複列の転動体５、５は転動自在に保持器９に保持されている。   Double rows of outer rolling surfaces 4a, 4a are formed on the inner periphery of the outer member 4, and one of the inner rolling surfaces of the inner member 3 facing the outer rolling surfaces 4a, 4a. The surface 1 a is formed on the hub wheel 1, and the other inner rolling surface 10 a is formed on the outer periphery of the inner ring 10. Double-row rolling elements 5 and 5 are accommodated between the rolling surfaces 4a, 1a and 4a and 10a, and the double-row rolling elements 5 and 5 are held in a cage 9 so as to be freely rollable.

外方部材４のアウトボード側の端部にはシール１１が装着され、外方部材４と内方部材３との環状空間を密封している。一方、外方部材４のインボード側の端部には、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４の開口部を閉塞している。これらシール１１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。   A seal 11 is attached to the end of the outer member 4 on the outboard side, and the annular space between the outer member 4 and the inner member 3 is sealed. On the other hand, a cup-shaped seal cap (not shown) is attached to the end of the outer member 4 on the inboard side, and closes the opening of the outer member 4. The seal 11 and the seal cap prevent leakage of the lubricating grease sealed inside the bearing and intrusion of rainwater and dust from the outside into the bearing.

また、外方部材４は、外周に突出した環状の車体取付部４ｂを一体に有し、この車体取付部４ｂから放射状に延びる４本の車体取付アーム１２が形成され、これら車体取付アーム１２の端部にそれぞれボルト挿通孔１３が穿設されている。この車体取付アーム１２は、ボルト挿通孔１３の近傍を除く部分を切欠いて、各ボルト挿通孔１３の形成部分と略同じ幅でもって、車体取付部４ｂから放射状に突出するように形成されている。そして、ボルト挿通孔１３に貫通するナックルボルト（図示せず）により、懸架装置を構成するナックル（図示せず）に固定される。さらに、外方部材４のインボード側の端部には、前記車体取付部４ｂから軸方向に延びる円筒状のナックルパイロット部４ｃが形成され、このナックルパイロット部４ｃの外径面にナックルが嵌合される。   Further, the outer member 4 integrally has an annular vehicle body mounting portion 4b protruding outward, and four vehicle body mounting arms 12 extending radially from the vehicle body mounting portion 4b are formed. Bolt insertion holes 13 are formed in the end portions. The vehicle body mounting arm 12 is formed so as to protrude radially from the vehicle body mounting portion 4b with a width substantially the same as the portion where each bolt insertion hole 13 is formed, by cutting out a portion other than the vicinity of the bolt insertion hole 13. . And it fixes to the knuckle (not shown) which comprises a suspension apparatus with the knuckle bolt (not shown) penetrated to the bolt insertion hole 13. FIG. Further, a cylindrical knuckle pilot portion 4c extending in the axial direction from the vehicle body attachment portion 4b is formed at an end portion on the inboard side of the outer member 4, and the knuckle is fitted on the outer diameter surface of the knuckle pilot portion 4c. Combined.

このように、外方部材４は、外周に突出した環状の車体取付部４ｂを有し、この車体取付部４ｂから放射状に延びる車体取付アーム１２が略同じ幅でもって形成されているので、外方部材４の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４ｃ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４の剛性を低下させることなく軽量化を図ることができる。   Thus, the outer member 4 has an annular vehicle body mounting portion 4b protruding to the outer periphery, and the vehicle body mounting arms 12 extending radially from the vehicle body mounting portion 4b are formed with substantially the same width. Weight reduction can be achieved without impairing the rigidity of the side member 4. The knuckle pilot portion 4c 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, weight reduction can be achieved without reducing the rigidity of the outer member 4.

また、本実施形態では、車輪取付アーム６が、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の形成部分だけが環状の基部から外径側に略同じ幅でもって突出するように形成されているので、外方部材４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、工具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。   Further, in the present embodiment, the wheel mounting arm 6 is cut out at a portion other than the vicinity of the hub bolt insertion hole 6b, and only the formation portion of each hub bolt insertion hole 6b protrudes from the annular base portion to the outer diameter side with substantially the same width. Thus, when the outer member 4 is fastened to the knuckle, the knuckle bolt can be easily fastened with a tool without being obstructed by the wheel mounting arm 6, and the assembly work can be performed. It can be simplified.

ハブ輪１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７に亙り高周波焼入れによって表面硬さを５４〜６４ＨＲＣの範囲に硬化処理されている。なお、加締部８は、鍛造後の素材表面硬さ２４ＨＲＣ以下の未焼入れ部としている。これにより、ハブ輪１の剛性が向上すると共に、内輪１０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１の耐久性が向上する。また、加締部８を塑性変形させる時の加工性が向上すると共に、加工時におけるクラック等の発生を防止してその品質の信頼性が向上する。   The hub wheel 1 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 7 of the wheel mounting arm 6. It is cured in the range of 54 to 64 HRC. The caulking portion 8 is an unquenched portion having a material surface hardness of 24 HRC or less after forging. As a result, the rigidity of the hub wheel 1 is improved, and fretting wear on the fitting surface with the inner ring 10 can be prevented, and the durability of the hub wheel 1 is improved. In addition, the workability when plastically deforming the caulking portion 8 is improved, and the occurrence of cracks and the like during processing is prevented, and the reliability of the quality is improved.

また、外方部材４は、ハブ輪１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４ａ、４ａに高周波焼入れによって表面硬さを５４〜６４ＨＲＣの範囲に硬化処理されている。一方、内輪１０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５４〜６４ＨＲＣの範囲で硬化処理されている。なお、ここでは、転動体５、５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。   Similarly to the hub wheel 1, the outer member 4 is formed of medium carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and the surface of the double row outer rolling surfaces 4a and 4a is induction hardened. Hardening is performed in the range of 54 to 64 HRC. On the other hand, the inner ring 10 is made of a high carbon chrome bearing steel such as SUJ2, and is hardened in the range of 54 to 64 HRC to the core portion by quenching. In addition, although the double row angular contact ball bearing which used the rolling elements 5 and 5 as a ball | bowl was illustrated here, the double row tapered roller bearing which uses a tapered roller for a rolling element may be sufficient not only in this.

本実施形態では、図１に示すように、ハブ輪１の車輪取付アーム６の基部にはアウトボード側に延びる円筒状のブレーキパイロット部１４が形成され、図示しないブレーキロータの内径面を案内している。また、このブレーキパイロット部１４からさらに延びてホイールパイロット部１５が形成されている。このホイールパイロット部１５は、ブレーキロータに重ねて装着される車輪（図示せず）の内径面を案内するもので、前記ブレーキパイロット部１４よりも僅かに小径に形成されている。そして、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る。ここでは、この断続したホイールパイロット部１５は、車輪取付アーム６の位置に対応して形成されている。これにより、ハブ輪１の剛性を低下させることなく軽量化を図ることができる。   In this embodiment, as shown in FIG. 1, a cylindrical brake pilot portion 14 extending toward the outboard side is formed at the base portion of the wheel mounting arm 6 of the hub wheel 1 to guide an inner diameter surface of a brake rotor (not shown). ing. Further, a wheel pilot portion 15 is formed extending further from the brake pilot portion 14. The wheel pilot portion 15 guides an inner diameter surface of a wheel (not shown) mounted on the brake rotor so as to be slightly smaller in diameter than the brake pilot portion 14. And the notch is provided in the several places of the circumferential direction, and it is intermittently formed in the shape of a protrusion. Here, the intermittent wheel pilot portion 15 is formed corresponding to the position of the wheel mounting arm 6. Thereby, weight reduction can be achieved without reducing the rigidity of the hub wheel 1.

さらに、ハブ輪１の車輪取付アーム６とブレーキパイロット部１５の隅部１６には円弧状の盗みが設けられている。これにより、隅部１６にブレーキロータが干渉するのを容易に防止することができる。そして、車輪取付アーム６のアウトボード側の側面１７が旋盤等で切削加工され、所定の面振れ以下になるよう平坦に形成されている。本実施形態では、この切削面となる側面１７の外縁部に切削加工による面取り１８が０．５〜２．０ｍｍの範囲で形成され、側面１７の外縁部に発生するバリあるいはエッジが切除されている。これにより、この車輪取付アーム６に繰返し曲げモーメントが負荷されても外縁部に応力集中が起こることはなく、これらのバリあるいはエッジからクラックが発生するのを確実に防止し、ハブ輪１の軽量化を図りつつ、耐久性を向上させることができる。   Further, arcuate stealing is provided at the wheel mounting arm 6 of the hub wheel 1 and the corner 16 of the brake pilot portion 15. Thereby, it is possible to easily prevent the brake rotor from interfering with the corner portion 16. Then, the side surface 17 on the outboard side of the wheel mounting arm 6 is cut by a lathe or the like and is formed flat so as to be equal to or less than a predetermined surface runout. In the present embodiment, a chamfer 18 by cutting is formed in a range of 0.5 to 2.0 mm at the outer edge portion of the side surface 17 serving as the cutting surface, and burrs or edges generated at the outer edge portion of the side surface 17 are cut off. Yes. As a result, even if a bending moment is repeatedly applied to the wheel mounting arm 6, stress concentration does not occur on the outer edge portion, and it is possible to reliably prevent cracks from occurring on these burrs or edges, and to reduce the weight of the hub wheel 1. Durability can be improved while achieving the above.

なお、外縁部の面取り１８は、側面１７の削り代を考慮して鍛造工程で予め鍛造により形成されていても良いが、側面１８の切削前後に切削により形成する方が面取り１８の表面を滑らかにできると共に、面取り１８の寸法バラツキを抑えることができ、確実に外縁部の応力集中を防止することができる。また、面取りは切削加工だけでなく、砥石による加工であっても良い。   The chamfer 18 of the outer edge portion may be formed by forging in advance in the forging process in consideration of the machining allowance of the side surface 17, but the surface of the chamfer 18 is smoother by forming before and after cutting the side surface 18. In addition, the dimensional variation of the chamfer 18 can be suppressed, and stress concentration at the outer edge can be reliably prevented. Further, the chamfering may be not only cutting processing but also processing with a grindstone.

また、外方部材４において、前述した車輪取付アーム６と同様、車体取付アーム１２の切削面となる側面１９の外縁部にも切削加工による面取り２０が０．５〜２．０ｍｍの範囲で形成され、側面１９の外縁部に発生するバリあるいはエッジが切除されている。これにより、外方部材４の軽量化を図りつつ、耐久性を向上させることができる。   Further, in the outer member 4, similarly to the wheel mounting arm 6 described above, a chamfer 20 by cutting is formed in the range of 0.5 to 2.0 mm on the outer edge portion of the side surface 19 which is the cutting surface of the vehicle body mounting arm 12. The burr or edge generated at the outer edge of the side surface 19 is cut off. Thereby, durability can be improved, aiming at weight reduction of the outer member 4. FIG.

図３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の正面図、図４は、図３のＡ部側面図である。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. 3 is a front view of a hub wheel in the second embodiment of the wheel bearing device according to the present invention, and FIG. 4 is a side view of a portion A of FIG. 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.

このハブ輪２１は、外周のアウトボード側の端部に放射状に延びる４本の車輪取付アーム２２を一体に有し、この車輪取付アーム２２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２２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、後述するブレーキパイロット部２３から放射状に突出するように形成されている。さらに、車輪取付アーム２２のインボード側の側面には、その基部に向って漸次肉厚になるようにリブ６ｃが形成されている。これにより、ハブ輪２１の剛性を損なうことなく軽量化を達成することができる。   This hub wheel 21 integrally has four wheel mounting arms 22 extending radially at the end on the outer board side of the outer periphery, and the wheel mounting arms 22 are used for fastening the wheels at circumferentially equidistant positions. Hub bolt 6a is planted. The wheel mounting arm 22 is cut out at a portion other than the vicinity of the hub bolt insertion hole 6b, and has a width substantially the same as the formation portion of each hub bolt insertion hole 6b, and projects radially from an annular base, that is, a brake pilot portion 23 described later. It is formed to do. Further, a rib 6c is formed on the side surface of the wheel mounting arm 22 on the inboard side so as to gradually increase in thickness toward the base portion. Thereby, weight reduction can be achieved without impairing the rigidity of the hub wheel 21.

車輪取付アーム２２の基部にはアウトボード側に延びる円筒状のブレーキパイロット部２３が形成され、図示しないブレーキロータの内径面を案内している。また、このブレーキパイロット部２３からさらに延びてホイールパイロット部２４が形成されている。このホイールパイロット部２４は、ブレーキロータに重ねて装着される車輪（図示せず）の内径面を案内するもので、前記ブレーキパイロット部２３よりも僅かに小径に形成されている。そして、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る。本実施形態では、この断続したホイールパイロット部２４は、隣り合う車輪取付アーム２２間に形成されている。   A cylindrical brake pilot portion 23 extending to the outboard side is formed at the base portion of the wheel mounting arm 22 to guide an inner diameter surface of a brake rotor (not shown). Further, a wheel pilot portion 24 is formed extending further from the brake pilot portion 23. The wheel pilot portion 24 guides an inner diameter surface of a wheel (not shown) mounted on the brake rotor so as to be slightly smaller in diameter than the brake pilot portion 23. And the notch is provided in the several places of the circumferential direction, and it is intermittently formed in the shape of a protrusion. In the present embodiment, the intermittent wheel pilot portion 24 is formed between adjacent wheel mounting arms 22.

本実施形態では、切削面となる車輪取付アーム２２のアウトボード側の側面２５から、この車輪取付アーム２２の基部となるブレーキパイロット部２３の側面２６に亙ってその外縁部に切削加工による面取り２７が０．５〜２．０ｍｍの範囲で形成され、側面２５、２６の外縁部に発生するバリあるいはエッジが切除されている。これにより、この車輪取付アーム２２繰返し曲げモーメントが負荷されても外縁部に応力集中が起こることはなく、これらのバリあるいはエッジからクラックが発生するのを確実に防止し、ハブ輪１の軽量化を図りつつ、耐久性を向上させることができる。   In the present embodiment, chamfering is performed on the outer edge portion of the wheel mounting arm 22 serving as the cutting surface from the side surface 25 on the outboard side to the side surface 26 of the brake pilot portion 23 serving as the base portion of the wheel mounting arm 22. 27 is formed in the range of 0.5 to 2.0 mm, and burrs or edges generated at the outer edges of the side surfaces 25 and 26 are cut off. As a result, even if this wheel mounting arm 22 is repeatedly subjected to a bending moment, stress concentration does not occur on the outer edge portion, and it is possible to reliably prevent cracks from occurring on these burrs or edges, and to reduce the weight of the hub wheel 1. As a result, durability can be improved.

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、あるいは転動体がボール、円錐ころ等、あらゆる構造の内輪回転タイプの車輪用軸受装置に適用することができる。   The wheel bearing device according to the present invention can be applied to an inner ring rotating type wheel bearing device of any structure such as a driving wheel, a driven wheel, or a rolling element having a ball, a tapered roller or the like.

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の右側面図である。It is a right view of FIG. 本発明に係る車輪用軸受装置の第の実施形態におけるハブ輪を示す正面図である。It is a front view which shows the hub ring in 1st Embodiment of the wheel bearing apparatus which concerns on this invention. 図３の側面図である。FIG. 4 is a side view of FIG. 3. 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. 従来のハブ輪を示す正面図である。It is a front view which shows the conventional hub wheel.

符号の説明Explanation of symbols

１、２１・・・・・・・・・・・・・・ハブ輪
１ａ、１０ａ・・・・・・・・・・・・内側転走面
２・・・・・・・・・・・・・・・・・車輪用軸受装置
３・・・・・・・・・・・・・・・・・内方部材
４・・・・・・・・・・・・・・・・・外方部材
４ａ・・・・・・・・・・・・・・・・外側転走面
４ｂ・・・・・・・・・・・・・・・・車体取付部
４ｃ・・・・・・・・・・・・・・・・ナックルパイロット部
５・・・・・・・・・・・・・・・・・転動体
６、２２・・・・・・・・・・・・・・車輪取付アーム
６ａ・・・・・・・・・・・・・・・・ハブボルト
６ｂ・・・・・・・・・・・・・・・・ハブボルト挿通孔
６ｃ・・・・・・・・・・・・・・・・リブ
７・・・・・・・・・・・・・・・・・小径段部
８・・・・・・・・・・・・・・・・・加締部
９・・・・・・・・・・・・・・・・・保持器
１０・・・・・・・・・・・・・・・・内輪
１１・・・・・・・・・・・・・・・・シール
１２・・・・・・・・・・・・・・・・車体取付アーム
１３・・・・・・・・・・・・・・・・ボルト挿通孔
１４、２３・・・・・・・・・・・・・ブレーキパイロット部
１５、２４・・・・・・・・・・・・・ホイールパイロット部
１６・・・・・・・・・・・・・・・・隅部
１７、１９、２５、２６・・・・・・・側面
１８、２０、２７・・・・・・・・・・面取り
５１・・・・・・・・・・・・・・・・ハブ輪
５１ａ、５５ａ・・・・・・・・・・・内側転走面
５１ｂ・・・・・・・・・・・・・・・小径段部
５２・・・・・・・・・・・・・・・・車輪用軸受装置
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・・・・・・・・・・・・・・・・転動体
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・・・・・・・・・・・・・・・・パイロット部
６６・・・・・・・・・・・・・・・・側面
６７・・・・・・・・・・・・・・・・隅部 1, 21 ... hub wheel 1a, 10a ... inner rolling surface 2 ...・ ・ ・ ・ ・ ・ Wheel bearing device 3 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner member 4 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outside Side member 4a ·········· Outside rolling surface 4b .... Knuckle pilot part 5 ... Rolling elements 6, 22 ... Wheel mounting arm 6a ... Hub bolt 6b ... Hub bolt insertion hole 6c ...・ ・ ・ ・ ・ ・ ・ ・ Rib 7 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Small diameter step 8 ・ ・ ・ ・ ・ ・ ・ ・··········································· 9・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Seal 12 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Car body mounting arm 13 .... Bolt insertion holes 14, 23 ......... Brake pilot parts 15, 24 ...... Wheel pilot parts 16・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Corner 17, 19, 25, 26 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Side 18, 20, 27 ・ ・ ・ ・ ・ ・ ・ ・ Chamfer 51 ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hub wheel 51a, 55a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner rolling surface 51b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Small diameter step Part 52... Wheel bearing device 53 ..... Wheel mounting flange 53a ..... hub bolt 54 ...・ ・ Spline 55 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner ring 56 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Clamping section 57 ・ ・ ・ ・ ・ ・ ・ ・... Outer member 57a ... Outer rolling surface 57b ... 58 ... knuckle 59 ... rolling element 60 ... Brake rotor 61 ... Bolt insertion hole 62 ... Notch 63 ...・ ・ ・ ・ ・ ・ ・ ・ Thin part 64 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Thick Part 65 ... Pilot part 66 ... Side 67 ... ... Corner

Claims (7)

ハブ輪と複列の転がり軸受とをユニット化した車輪用軸受装置であって、
前記複列の転がり軸受が、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圧入された内輪とからなり、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が形成されると共に、少なくとも前記車輪取付フランジにおけるアウトボード側の側面の外縁部に面取りが形成されていることを特徴とする車輪用軸受装置。 A wheel bearing device in which a hub ring and a double row rolling bearing are unitized,
The double row rolling bearing is an outer member in which a double row outer rolling surface is formed on the inner periphery,
From a hub wheel integrally having a wheel mounting flange at the end on the outboard side and having a cylindrical small-diameter step portion extending in the axial direction on the outer periphery, and an inner ring press-fitted into the small-diameter step portion of the hub wheel And an inner member formed with an inner rolling surface facing the outer rolling surface of the double row on the outer periphery,
In a wheel bearing device comprising: a double-row rolling element accommodated between the rolling surfaces so as to be freely rollable;
A notch is formed between the hub bolt insertion holes, avoiding the periphery of the hub bolt insertion holes perforated at equal circumferences of the wheel mounting flanges, from the pitch circle diameter of the hub bolt insertion holes to the inner diameter side, and at least A wheel bearing device, wherein a chamfer is formed on an outer edge portion of a side surface on the outboard side of the wheel mounting flange. 前記面取りが切削により形成されている請求項１に記載の車輪用軸受装置。   The wheel bearing device according to claim 1, wherein the chamfer is formed by cutting. 前記車輪取付フランジが、前記ハブボルト挿通孔の近傍を除く部分を切欠いて、当該ハブボルト挿通孔の形成部分と略同じ幅でもって、環状の基部から放射状に突出するように形成されていると共に、前記車輪取付フランジにおけるインボード側の側面が、その基部に向って漸次肉厚になるようにリブ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 so as to protrude radially from an annular base portion with a width substantially the same as the formation portion of the hub bolt insertion hole by cutting out a portion except the vicinity of the hub bolt insertion hole. The wheel bearing device according to claim 1 or 2, wherein a rib is formed so that a side surface on an inboard side of the wheel mounting flange is gradually thickened toward a base portion thereof. 前記ハブ輪に、前記車輪取付フランジよりもアウトボード側に延びてブレーキロータの内径面を案内するブレーキパイロット部、およびこのブレーキロータパイロット部からさらにアウトボード側に延びてホイールの内径面を案内するホイールパイロット部が形成され、少なくとも前記ホイールパイロット部が、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る請求項１乃至３にいずれか記載の車輪用軸受装置。   A brake pilot portion that extends to the hub wheel toward the outboard side from the wheel mounting flange and guides the inner diameter surface of the brake rotor, and further extends from the brake rotor pilot portion to the outboard side to guide the inner diameter surface of the wheel. The wheel according to any one of claims 1 to 3, wherein a wheel pilot portion is formed, and at least the wheel pilot portion is provided with notches at a plurality of locations in a circumferential direction thereof, and is intermittently formed in a protruding piece shape. Bearing device. 前記外方部材が、外周に突出した環状の車体取付部を一体に有し、この車体取付部から放射状に延びる複数の車体取付アームが形成され、これら車体取付アームの端部にそれぞれナックルに固定されるボルト挿通孔が穿設されると共に、前記車体取付アームが、前記ボルト挿通孔の近傍を除く部分を切欠いて、当該ボルト挿通孔の形成部分と略同じ幅でもって、前記車体取付部から放射状に突出するように形成されている請求項１乃至４いずれかに記載の車輪用軸受装置。   The outer member integrally has an annular vehicle body mounting portion projecting to the outer periphery, and a plurality of vehicle body mounting arms extending radially from the vehicle body mounting portion are formed, and fixed to the knuckles at the ends of the vehicle body mounting arms, respectively. A bolt insertion hole to be drilled, and the vehicle body mounting arm is cut out at a portion except the vicinity of the bolt insertion hole, and has a width substantially the same as a portion where the bolt insertion hole is formed. The wheel bearing device according to any one of claims 1 to 4, wherein the wheel bearing device is formed so as to protrude radially. 少なくとも前記車体取付アームにおけるインボード側の側面の外縁部に面取りが形成されている請求項５に記載の車輪用軸受装置。   The wheel bearing device according to claim 5, wherein chamfering is formed at least on an outer edge portion of the side surface on the inboard side of the vehicle body mounting arm. 前記ハブ輪の外周に一方の内側転走面が形成され、前記小径段部に圧入された一つの内輪の外周に他方の内側転走面が形成されると共に、前記小径段部の端部を径方向外方に塑性変形させて加締部が形成され、この加締部により前記内輪が前記ハブ輪に対して軸方向に固定されている請求項１乃至６いずれかに記載の車輪用軸受装置。   One inner rolling surface is formed on the outer periphery of the hub wheel, the other inner rolling surface is formed on the outer periphery of one inner ring press-fitted into the small diameter step portion, and the end of the small diameter step portion is The wheel bearing according to claim 1, wherein a caulking portion is formed by plastic deformation radially outward, and the inner ring is fixed in an axial direction with respect to the hub wheel by the caulking portion. apparatus.
JP2004111467A 2004-04-05 2004-04-05 Bearing device for wheel Pending JP2005289319A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009060605A1 (en) * 2007-11-06 2009-05-14 Ntn Corporation Bearing device for wheel
KR20180110333A (en) * 2017-03-29 2018-10-10 현대모비스 주식회사 Wheel bearing for vehicle and knuckle apparatus including the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009060605A1 (en) * 2007-11-06 2009-05-14 Ntn Corporation Bearing device for wheel
JP2009113635A (en) * 2007-11-06 2009-05-28 Ntn Corp Wheel bearing device
US8568036B2 (en) 2007-11-06 2013-10-29 Ntn Corporation Wheel bearing apparatus for a vehicle
KR20180110333A (en) * 2017-03-29 2018-10-10 현대모비스 주식회사 Wheel bearing for vehicle and knuckle apparatus including the same
KR102214033B1 (en) 2017-03-29 2021-02-09 현대모비스 주식회사 Wheel bearing for vehicle and knuckle apparatus including the same

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