JP2005289147A - Bearing device for wheel - Google Patents

Bearing device for wheel Download PDF

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Publication number
JP2005289147A
JP2005289147A JP2004104644A JP2004104644A JP2005289147A JP 2005289147 A JP2005289147 A JP 2005289147A JP 2004104644 A JP2004104644 A JP 2004104644A JP 2004104644 A JP2004104644 A JP 2004104644A JP 2005289147 A JP2005289147 A JP 2005289147A
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Prior art keywords
wheel
hub
bolt insertion
bearing device
insertion hole
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JP2004104644A
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Japanese (ja)
Inventor
Isao Hirai
功 平井
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2004104644A priority Critical patent/JP2005289147A/en
Publication of JP2005289147A publication Critical patent/JP2005289147A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0005—Hubs with ball bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0047—Hubs characterised by functional integration of other elements
    • B60B27/0052—Hubs characterised by functional integration of other elements the element being a brake disc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0094—Hubs one or more of the bearing races are formed by the hub
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/10—Reduction of
    • B60B2900/114—Size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/30—Increase in
    • B60B2900/311—Rigidity or stiffness
    • 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)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for a wheel which is reduced in weight and size, and is improved in the strength of a hub wheel and durability under the condition of a rotary bending load. <P>SOLUTION: The bearing device 2 for a wheel is equipped with an outer member 4 with double row outer rolling surfaces 4a formed on its inner periphery, an inner member 3 which integrally has a plurality of radially extending wheel mounting arms 6 at the end of the outboard side and comprises one inside rolling surface 1a formed on the outer periphery, a hub wheel 1 on which a cylindrical small diameter step part 7 axially extending from the inside rolling surface 1a is formed, and an inner wheel 10 which is pressed in the small diameter step part 7 with the other inside rolling surface 10a formed on the outer periphery, and with double row rolling elements 5 accommodated between both rolling surfaces in a freely rolling way. The side face 17 of the outboard side of the wheel mounting arm 6 is formed tilting on the inboard side by a tilting angle α toward the end part relative to the vertical face. <P>COPYRIGHT: (C)2006,JPO&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６は、自動車に用いられ、軽量化を図った車輪用軸受装置の一例である。この車輪用軸受装置は駆動輪側に使用される代表的な構造で、ハブ輪５１と複列の転がり軸受５２とがユニット化して構成されている。   FIG. 6 shows an example of a wheel bearing device that is used in an automobile and is reduced in weight. This wheel bearing device has a typical structure used on the drive wheel side, and includes a hub wheel 51 and a double row rolling bearing 52 as a unit.

ハブ輪５１は鍛造により形成されて中空構造をなし、図示しない車輪を取り付けるための車輪取付フランジ５３を一体に有し、その外周に複列の転がり軸受５２の一方の内側転走面５１ａと、この内側転走面５１ａから軸方向に延びる円筒状の小径段部５１ｂが形成され、内周にトルク伝達用のスプライン５４が形成されている。   The hub wheel 51 is formed by forging to form a hollow structure, and integrally includes a wheel mounting flange 53 for mounting a wheel (not shown), and one inner rolling surface 51a of the double row rolling bearing 52 on the outer periphery thereof. 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、複列の転がり軸受５２の他方の内側転走面５５ａが外周に形成された別体の内輪５５が圧入されている。そして、小径段部５１ｂの端部を径方向外方に塑性変形させて加締部５６が形成され、この加締部５６によって内輪５５がハブ輪５１に対して軸方向に固定されている。   A separate inner ring 55 in which the other inner rolling surface 55a of the double row rolling bearing 52 is formed on the outer periphery is press-fitted into the small diameter step portion 51b. The end portion of the small diameter step portion 51 b is plastically deformed radially outward to form a crimped portion 56, and the inner ring 55 is fixed to the hub wheel 51 in the axial direction by the crimped portion 56.

一方、複列の転がり軸受５２を構成する外方部材５７は、懸架装置を構成するナックル５８に固定するための車体取付フランジ５７ｂを一体に有し、内周に前記内側転走面５１ａ、５５ａに対向する複列の外側転走面５７ａ、５７ａが形成されている。このように、複列の転がり軸受５２は、ハブ輪５１、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 double-row rolling bearing 52 integrally has a vehicle body mounting flange 57b for fixing to the knuckle 58 constituting the suspension device, and the inner rolling surfaces 51a, 55a are arranged on the inner periphery. Double row outer rolling surfaces 57a and 57a are formed opposite to each other. As described above, the double row rolling bearing 52 includes the hub wheel 51, the inner ring 55, the outer member 57, and the double row rolling elements that are accommodated so as to roll freely between the rolling surfaces 51a, 57a, 55a, and 57a. 59, 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７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. 7, the hub wheel 51 is formed with a bolt insertion hole 61 in which the hub bolt 53 a is fixed to the wheel mounting flange 53, and avoids the periphery of the bolt insertion hole 61. , An R-shaped notch 62 is formed on the outer periphery of the wheel mounting flange 53.

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

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、図６に示すように、ブレーキロータ６０および車輪が嵌挿されるパイロット部６５と車輪取付フランジ５３の側面６６との隅部６７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隅部６７の表面に繰り返し引張応力が発生することになる。こうした引張応力はハブ輪５１の疲労強度を低下させ、特に、スリム化を図ったこうしたハブ輪５１において顕著に現れ、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, as shown in FIG. In addition, the corner portion 67 between the brake rotor 60 and the pilot portion 65 into which the wheel is inserted and the side surface 66 of the wheel mounting flange 53 is a portion where an alternating stress is generated due to a lateral turning or the like of the vehicle. As a result, tensile stress is repeatedly generated on the surface of the corner 67. Such tensile stress lowers the fatigue strength of the hub wheel 51, and particularly appears in such a hub wheel 51 that is slimmed down.

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ハブ輪の強度、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 of the hub wheel under the condition of rotational bending load. The purpose is to provide.

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、当該車輪取付フランジのアウトボード側の側面が、垂直面に対して端部に向って僅かにインボード側に傾斜して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 integrally formed with a cylindrical small-diameter stepped 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 ring, and the double row outer rolling on the outer periphery In the wheel bearing device, comprising: an inner member formed with an inner rolling surface facing the surface; and a double row rolling element that is slidably accommodated between the both rolling surfaces. A notch is formed between the hub bolt insertion holes, avoiding the periphery of the hub bolt insertion holes drilled on the circumference of the flange at equal intervals, from the pitch circle diameter of the hub bolt insertion holes, to the wheel mounting flange. The side of the outboard side is slightly toward the edge with respect to the vertical plane Employing the configuration is formed to be inclined to the inboard side.

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、当該車輪取付フランジのアウトボード側の側面が、垂直面に対して端部に向って僅かにインボード側に傾斜して形成されているので、車輪取付フランジがハブボルトの締付により変形し、その側面が垂直面に矯正されることで、車輪取付フランジの基部である隅部に圧縮応力が付与される。したがって、車両の横旋回等により交番応力がこの隅部に発生して繰返し曲げモーメントが負荷され、隅部の表面に繰り返し引張応力が発生しても、ハブ輪の疲労強度は低下することなく充分な耐久性を維持することができる。   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. At the same time, the side surface on the outboard side of the wheel mounting flange is slightly inclined toward the inboard side toward the end with respect to the vertical surface, so that the wheel mounting flange is deformed by tightening the hub bolt. By compressing the side surface into a vertical surface, a compressive stress is applied to the corner that is the base of the wheel mounting flange. Therefore, even if an alternating stress is generated at this corner due to a vehicle turning or the like, and a repeated bending moment is applied, and a repeated tensile stress is generated on the surface of the corner, the fatigue strength of the hub wheel does not decrease sufficiently. Durability can be maintained.

好ましくは、請求項２に記載の発明のように、前記傾斜角が５分以下に設定されているので、車輪取付フランジのインボード側の基部に引張応力が生じるのを抑制して疲労強度の低下を防止することができる。   Preferably, as in the invention described in claim 2, since the inclination angle is set to 5 minutes or less, it is possible to suppress the occurrence of tensile stress at the base portion on the inboard side of the wheel mounting flange, thereby reducing the fatigue strength. A decrease can be 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、その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。   Further, in the invention according to claim 3, 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 the formation portion of the hub bolt insertion hole, and radiating from the annular base portion. Since the rib is formed so that the side surface on the inboard side of the wheel mounting flange gradually becomes thicker toward the base portion thereof, without damaging the rigidity of the hub wheel. Weight reduction can be achieved.

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.

好ましくは、請求項５に記載の発明のように、前記ホイールパイロット部が、前記ハブボルト挿通孔の位置に対応して配設されていれば、軽量化を図りつつ一層ハブ輪の剛性を確保することができる。   Preferably, as in the fifth aspect of the present invention, if the wheel pilot portion is disposed corresponding to the position of the hub bolt insertion hole, the rigidity of the hub wheel is further secured while reducing the weight. be able to.

また、請求項６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 sixth 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複列の内側転走面が形成された内方部材と、前記両転走面間に転動自在に収容された複列の転動体とを備えた車輪用軸受装置において、前記車輪取付フランジの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、当該車輪取付フランジのアウトボード側の側面が、垂直面に対して端部に向って僅かにインボード側に傾斜して形成されているので、車輪取付フランジがハブボルトの締付により変形し、その側面が垂直面に矯正されることで、車輪取付フランジの基部である隅部に圧縮応力が付与される。したがって、車両の横旋回等により交番応力がこの隅部に発生して繰返し曲げモーメントが負荷され、隅部の表面に繰り返し引張応力が発生しても、ハブ輪の疲労強度は低下することなく充分な耐久性を維持することができる。   The wheel bearing device according to the present invention has an outer member in which a double row outer rolling surface is formed on the inner periphery, and a wheel mounting flange at the end on the outboard side, and the outer periphery in the axial direction. A hub wheel formed with an extending cylindrical small-diameter stepped portion, and at least one inner ring press-fitted into the small-diameter stepped portion of the hub wheel, the outer periphery of the double-row facing the outer rolling surface of the double-row In a wheel bearing device comprising an inner member in which an inner rolling surface is formed and a double row rolling element that is accommodated so as to roll between both rolling surfaces, the circumference of the wheel mounting flange, etc. A notch is formed between the hub bolt insertion holes, avoiding the periphery of the hub bolt insertion hole formed in the arrangement, from the pitch circle diameter of the hub bolt insertion hole to the inner diameter side, and on the outboard side of the wheel mounting flange. Sides slightly indented towards the edge with respect to the vertical plane Since the wheel mounting flange is deformed by tightening the hub bolt and the side surface is corrected to a vertical surface, compressive stress is applied to the corner that is the base of the wheel mounting flange. Is done. Therefore, even if alternating stress is generated at the corners due to the vehicle turning or the like and repeated bending moments are applied, and repeated tensile stresses are generated on the surface of the corners, the fatigue strength of the hub wheel does not decrease sufficiently. Durability can be maintained.

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、当該車輪取付フランジのアウトボード側の側面が、垂直面に対して端部に向って僅かにインボード側に傾斜して形成されている。   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 device 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 that is movably accommodated between the both rolling surfaces. In the above, 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 flanges, from the pitch circle diameter of the hub bolt insertion holes to the inner diameter side. The side surface of the wheel mounting flange on the outboard side is the end with respect to the vertical surface. Towards it is formed to be inclined slightly inboard side.

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実施形態を示す縦断面図、図２は、図１の右側面図、図３は、図１におけるハブ輪の右側面図である。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.
1 is a longitudinal sectional view showing an embodiment of a wheel bearing device according to the present invention, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is a right side view of a hub wheel in 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、この車輪用軸受装置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 is configured to roll between an inner member 3, an outer member 4, and both members 3, 4. It has double-row rolling elements (balls) 5 and 5 accommodated in a freely movable manner. 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の車輪取付アーム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, on the outer periphery of the wheel mounting arm 6 of the hub wheel 1 on the inboard side, 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. 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を収容し、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 these rolling surfaces 4a, 1a and 4a and 10a, and these double-row rolling elements 5 and 5 are held by 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.

こうしたホイールパイロット部１５によって、図４に示すようなアルミホイール等の削り出しのホイール１９であっても良く、また、図５に示すような、鋼板をプレスによって成形されたホイール２０であっても良い。これにより、偏心の恐れを生じることなく精度良く、かつ簡便に装着することができる。   Such a wheel pilot portion 15 may be a machined wheel 19 such as an aluminum wheel as shown in FIG. 4, or a wheel 20 formed by pressing a steel plate as shown in FIG. good. Thereby, it can mount | wear with high precision and simply, without producing fear of eccentricity.

一方、図４および図５において、ブレーキパイロット部１４が全周に連続したものとされているので、ディスクブレーキにおけるブレーキロータ１８に限らず、ドラムブレーキにおけるブレーキドラム（図示せず）であっても同様に、偏心の恐れを生じることなく精度良く装着することができ、ブレーキ振動の発生を抑制することができる。なお、ここで、ホイールパイロット部１５のように、ブレーキパイロット部１４も分割型とすれば一層の軽量化を図ることができる。   On the other hand, in FIGS. 4 and 5, since the brake pilot portion 14 is continuous over the entire circumference, not only the brake rotor 18 in the disc brake but also a brake drum (not shown) in the drum brake. Similarly, it can be mounted with high accuracy without causing the risk of eccentricity, and the occurrence of brake vibration can be suppressed. Here, if the brake pilot portion 14 is also of a split type like the wheel pilot portion 15, further weight reduction can be achieved.

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。さらに、アウトボード側の側面１７が、この隅部１６から垂直面に対して端部（径方向外方）に向って僅かにインボード側に傾斜して形成されている。これにより、ハブボルト６ａによってブレーキロータおよび車輪をハブ輪１に締結する際、この車輪取付アーム６自体がアウトボード側に変形してブレーキロータの側面に密着する。なお、本実施形態では、隅部１６に円弧状の盗みを設けたが、必ずしもこの盗みは設けなくても良い。   In the present embodiment, as shown in FIG. 1, arc 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. Further, the side surface 17 on the outboard side is formed so as to be slightly inclined toward the inboard side from the corner portion 16 toward the end portion (radially outward) with respect to the vertical surface. Thus, when the brake rotor and the wheel are fastened to the hub wheel 1 by the hub bolt 6a, the wheel mounting arm 6 itself is deformed to the outboard side and is in close contact with the side surface of the brake rotor. In the present embodiment, an arc-shaped theft is provided at the corner 16, but this stealing is not necessarily provided.

当初インボード側に傾斜していた車輪取付アーム６がハブボルト６ａの締付により変形し、その側面１７が垂直面に矯正されることで、車輪取付アーム６の基部である隅部１６に圧縮応力が付与されることになる。したがって、車両の横旋回等により交番応力がこの隅部１６に発生して繰返し曲げモーメントが負荷され、隅部１６の表面に繰り返し引張応力が発生しても、ハブ輪１の疲労強度は低下することなく充分な耐久性を維持することができる。なお、車輪取付アーム６の傾斜角αは、ハブ輪１のサイズによって適宜変更されるが５分以下が好ましい。この傾斜角αが５分を超えると、車輪取付アーム６の基部のインボード側に過大な引張応力が生じて疲労強度を低下させる恐れがあるからである。   The wheel mounting arm 6 that was initially inclined to the inboard side is deformed by tightening the hub bolt 6a, and its side surface 17 is corrected to a vertical surface, whereby a compressive stress is applied to the corner 16 that is the base of the wheel mounting arm 6. Will be granted. Therefore, even if an alternating stress is generated at the corner 16 due to the vehicle turning or the like, and a repeated bending moment is applied, and the tensile stress is repeatedly generated on the surface of the corner 16, the fatigue strength of the hub wheel 1 is lowered. And sufficient durability can be maintained. Although the inclination angle α of the wheel mounting arm 6 is appropriately changed depending on the size of the hub wheel 1, it is preferably 5 minutes or less. This is because if the inclination angle α exceeds 5 minutes, an excessive tensile stress may be generated on the inboard side of the base of the wheel mounting arm 6 to reduce the fatigue strength.

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. 図１におけるハブ輪の右側面図である。It is a right view of the hub wheel in FIG. 本発明に係る車輪用軸受装置にブレーキロータおよび車輪を装着した状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which mounted | wore the brake rotor and the wheel with the wheel bearing apparatus which concerns on this invention. 同上Same as above 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・・・・・・・・・・・・・・・・・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・・・・・・・・・・・・・・・・・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・・・・・・・・・・・・・・・・ブレーキパイロット部
１５・・・・・・・・・・・・・・・・ホイールパイロット部
１６・・・・・・・・・・・・・・・・隅部
１７・・・・・・・・・・・・・・・・側面
１８・・・・・・・・・・・・・・・・ブレーキロータ
１９・・・・・・・・・・・・・・・・削り出しのホイール
２０・・・・・・・・・・・・・・・・プレス製のホイール
５１・・・・・・・・・・・・・・・・ハブ輪
５１ａ、５５ａ・・・・・・・・・・・内側転走面
５１ｂ・・・・・・・・・・・・・・・小径段部
５２・・・・・・・・・・・・・・・・複列の転がり軸受
５３・・・・・・・・・・・・・・・・車輪取付フランジ
５３ａ・・・・・・・・・・・・・・・ハブボルト
５４・・・・・・・・・・・・・・・・スプライン
５５・・・・・・・・・・・・・・・・内輪
５６・・・・・・・・・・・・・・・・加締部
５７・・・・・・・・・・・・・・・・外方部材
５７ａ・・・・・・・・・・・・・・・外側転走面
５７ｂ・・・・・・・・・・・・・・・車体取付部
５８・・・・・・・・・・・・・・・・ナックル
５９・・・・・・・・・・・・・・・・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
Ａ・・・・・・・・・・・・・・・・・ピッチ円直径
Ｂ・・・・・・・・・・・・・・・・・隣接するボルト挿通孔の中心を結ぶ弦
α・・・・・・・・・・・・・・・・・傾斜角 1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hub wheel 1a, 10a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner rolling surface 2 ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Wheel bearing device 3 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner member 4 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・Outer member 4a ·········· Outside rolling surface 4b・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Knuckle pilot 5 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rolling element 6・ ・ 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 hole 14 ... Brake pilot part 15 ... Wheel pilot part 16 ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Corner 17 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Side 18 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ Brake rotor 19 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Machined wheel 20 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Pressed wheel 51 ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hub wheels 51a, 55a ・ ・ ・ ・ ・ ・... Inner rolling surface 51b ... Small diameter step 52 ... Double row rolling bearing 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 wall 64 ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ Thick part 65 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Pilot part 66 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Side 67 ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Corner A ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Pitch circle diameter B ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ String α connecting the center of adjacent bolt insertion holes ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inclination angle

Claims (7)

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複列の内側転走面が形成された内方部材と、
前記両転走面間に転動自在に収容された複列の転動体と、を備えた車輪用軸受装置において、
前記車輪取付フランジの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、当該車輪取付フランジのアウトボード側の側面が、垂直面に対して端部に向って僅かにインボード側に傾斜して形成されていることを特徴とする車輪用軸受装置。 An outer member having a double row outer raceway formed on the inner periphery;
A hub wheel integrally having a wheel mounting flange at the end on the outboard side and having a cylindrical small-diameter step portion extending in the axial direction on the outer periphery, and at least one press-fitted into the small-diameter step portion of the hub wheel An inner member formed of an inner ring, and an inner member in which a double-row inner rolling surface facing the double-row outer rolling surface is formed 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. A wheel bearing device, wherein a side surface of the wheel mounting flange on the outboard side is formed to be slightly inclined toward the inboard side toward the end with respect to the vertical surface. 前記傾斜角が５分以下に設定されている請求項１に記載の車輪用軸受装置。   The wheel bearing device according to claim 1, wherein the inclination angle is set to 5 minutes or less. 前記車輪取付フランジは、その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 project 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 toward the outboard side from the wheel mounting flange and guides the inner diameter surface of the brake rotor to the hub wheel, and a wheel that extends further from the brake pilot portion to the outboard side and guides the inner diameter surface of the wheel The wheel part according to any one of claims 1 to 3, wherein a pilot part is formed, and at least the wheel pilot part is provided with notches at a plurality of positions in a circumferential direction, and is formed intermittently in a protruding piece shape. Bearing device. 前記ホイールパイロット部が、前記ハブボルト挿通孔の位置に対応して配設されている請求項４に記載の車輪用軸受装置。   The wheel bearing device according to claim 4, wherein the wheel pilot portion is disposed corresponding to a position of the hub bolt insertion hole. 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５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 5, wherein the wheel bearing device is formed so as to protrude radially. 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.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007283960A (en) * 2006-04-19 2007-11-01 Ntn Corp Bearing for wheel and its shape design method
WO2010052897A1 (en) * 2008-11-05 2010-05-14 Ntn株式会社 Bearing device for wheels
EP2618012A1 (en) * 2012-01-17 2013-07-24 Jtekt Corporation Wheel hub rolling bearing unit for a motor vehicle with a cold forged inner ring and a seal
WO2019015983A1 (en) * 2017-07-18 2019-01-24 Saf-Holland Gmbh Wheel hub, a brake disc, a fastening means, and a system formed of wheel hub, brake disc and fastening means

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007283960A (en) * 2006-04-19 2007-11-01 Ntn Corp Bearing for wheel and its shape design method
WO2010052897A1 (en) * 2008-11-05 2010-05-14 Ntn株式会社 Bearing device for wheels
JP2010112446A (en) * 2008-11-05 2010-05-20 Ntn Corp Wheel bearing device
CN102202913A (en) * 2008-11-05 2011-09-28 Ntn株式会社 Bearing device for wheels
US8794844B2 (en) 2008-11-05 2014-08-05 Ntn Corporation Wheel bearing apparatus for a vehicle
EP2618012A1 (en) * 2012-01-17 2013-07-24 Jtekt Corporation Wheel hub rolling bearing unit for a motor vehicle with a cold forged inner ring and a seal
US8915651B2 (en) 2012-01-17 2014-12-23 Jtekt Corporation Wheel rolling bearing device
WO2019015983A1 (en) * 2017-07-18 2019-01-24 Saf-Holland Gmbh Wheel hub, a brake disc, a fastening means, and a system formed of wheel hub, brake disc and fastening means
US11590796B2 (en) 2017-07-18 2023-02-28 Saf-Holland Gmbh Wheel hub, a brake disc, a fastening means, and a system formed of wheel hub, brake disc and fastening means

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