JP2007161147A - Bearing device for wheel - Google Patents

Bearing device for wheel Download PDF

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Publication number
JP2007161147A
JP2007161147A JP2005361756A JP2005361756A JP2007161147A JP 2007161147 A JP2007161147 A JP 2007161147A JP 2005361756 A JP2005361756 A JP 2005361756A JP 2005361756 A JP2005361756 A JP 2005361756A JP 2007161147 A JP2007161147 A JP 2007161147A
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Prior art keywords
wheel
hub wheel
bearing device
caulking
rolling
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Pending
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JP2005361756A
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Japanese (ja)
Inventor
Hiroshi Kawamura
浩志 河村
Shigeaki Fukushima
茂明 福島
Kiyoshige Yamauchi
清茂 山内
Hitohiro Ozawa
仁博 小澤
Hikari Umekida
光 梅木田
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2005361756A priority Critical patent/JP2007161147A/en
Publication of JP2007161147A publication Critical patent/JP2007161147A/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
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • 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
    • F16C19/187—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 all four raceways integrated on parts other than race rings, e.g. fourth 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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for a wheel of a fourth generation structure ensuring durability over a long period of time by making it light weight and compact and increasing strength of a calking part. <P>SOLUTION: In the bearing device for the vehicle an outer coupling member is fixed to a hub wheel 1 in an axial direction by the calking part formed by plastically deforming an end of a shaft part 20 of the outer coupling member 14 to an outside in a radial direction. A predetermined cured layer 12 by induction hardening of a serration 1c of the hub wheel 1 and a predetermined twisted angle relative to an axis is provided on a serration 20c of the shaft part 20. A part of an outer side is maintained to the raw state of non-hardening and the calking part 22 is formed on an opening end surface 21 of the hub wheel 1 by rocking die calking and is projected to an outer side more than a pilot part 23. Thereby, the calking part 22 can be made of a large diameter, stress generation on a base part can be relaxed and rattling in a rotation direction is suppressed to enhance traveling stability of the vehicle. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、自動車等の車輪を回転自在に支承する車輪用軸受装置、特に、軽量・コンパクト化と共に、結合部の耐久性の向上を図った第４世代構造の車輪用軸受装置に関するものである。   BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel bearing device that rotatably supports a wheel of an automobile or the like, and more particularly to a wheel bearing device having a fourth generation structure that is lightweight and compact and improves the durability of a coupling portion. .

従来から自動車等の車輪を支持する車輪用軸受装置は、車輪を取り付けるためのハブ輪を転がり軸受を介して回転自在に支承するもので、所望の軸受剛性を有し、ミスアライメントに対しても耐久性を発揮すると共に、燃費向上の観点から回転トルクが小さい複列アンギュラ玉軸受が多用されている。   Conventionally, a wheel bearing device for supporting a wheel of an automobile or the like is such that a hub wheel for mounting a wheel is rotatably supported via a rolling bearing, and has a desired bearing rigidity, and also against misalignment. Double row angular contact ball bearings exhibiting durability and low rotational torque are frequently used from the viewpoint of improving fuel efficiency.

また、車輪用軸受装置には、懸架装置を構成するナックルとハブ輪との間に複列アンギュラ玉軸受等からなる車輪用軸受を嵌合させた第１世代と称される構造から、外方部材の外周に直接車体取付フランジまたは車輪取付フランジが形成された第２世代構造、また、ハブ輪の外周に一方の内側転走面が直接形成された第３世代構造までが量産化されると共に、さらにハブ輪と等速自在継手の外側継手部材の外周にそれぞれ内側転走面が直接形成されて軽量・コンパクト化された第４世代構造が開発され、一部市場に投入されようとしている。   Further, the wheel bearing device has a structure called a first generation in which a wheel bearing composed of a double row angular ball bearing or the like is fitted between a knuckle and a hub wheel constituting a suspension device. The second generation structure in which the body mounting flange or the wheel mounting flange is directly formed on the outer periphery of the member, and the third generation structure in which one inner rolling surface is directly formed on the outer periphery of the hub wheel are mass-produced. Furthermore, a fourth generation structure has been developed that is lighter and more compact by directly forming inner rolling surfaces on the outer periphery of the outer joint member of the hub wheel and the constant velocity universal joint, and is about to be introduced into the market.

この第４世代構造の車輪用軸受装置として、図３に示すものが知られている。この車輪用軸受装置は、ハブ輪５０、複列の転がり軸受５１および等速自在継手５２がユニット化されている。複列の転がり軸受５１は、外周にナックル（図示せず）に取り付けられるための車体取付フランジ５３ｂを一体に有し、内周に複列の外側転走面５３ａ、５３ａが形成された外方部材５３と、一端部に車輪（図示せず）を取り付けるための車輪取付フランジ５４を一体に有し、外周に複列の外側転走面５３ａ、５３ａに対向する一方の内側転走面５０ａと、この内側転走面５０ａから軸方向に延びる小径段部５０ｂが形成されたハブ輪５０、およびこのハブ輪５０の小径段部５０ｂに内嵌され、複列の外側転走面５３ａ、５３ａに対向する他方の内側転走面５５ａが形成された外側継手部材５５からなる内方部材５６と、これら両転走面間に収容された複列のボール５７、５７と、これら複列のボール５７、５７を転動自在に保持する保持器５８、５８とを備えた複列アンギュラ玉軸受で構成されている。ハブ輪５０の外周には、アウター側のシール６５が摺接するシールランド部から内側転走面５０ａおよび小径段部５０ｂの端面に亙って高周波焼入れによって所定の硬化層が形成されている。   As this fourth-generation wheel bearing device, one shown in FIG. 3 is known. In this wheel bearing device, a hub wheel 50, a double row rolling bearing 51, and a constant velocity universal joint 52 are unitized. The double-row rolling bearing 51 has a vehicle body mounting flange 53b integrally attached to a knuckle (not shown) on the outer periphery, and an outer side in which double-row outer rolling surfaces 53a and 53a are formed on the inner periphery. A member 53 and a wheel mounting flange 54 for mounting a wheel (not shown) at one end are integrally provided, and one inner rolling surface 50a facing the double row outer rolling surfaces 53a and 53a on the outer periphery. The hub wheel 50 in which a small-diameter step portion 50b extending in the axial direction from the inner rolling surface 50a is formed, and the small-diameter step portion 50b of the hub wheel 50 are fitted into the double-row outer rolling surfaces 53a and 53a. An inner member 56 composed of an outer joint member 55 formed with the other inner rolling surface 55a facing each other, double rows of balls 57, 57 accommodated between both rolling surfaces, and these double rows of balls 57 , 57 to hold the roller freely Is composed of a double row angular contact ball bearing having an 8 and 58. On the outer periphery of the hub wheel 50, a predetermined hardened layer is formed by induction hardening over the end face of the inner rolling surface 50a and the small-diameter stepped portion 50b from the seal land portion where the outer seal 65 is in sliding contact.

等速自在継手５２は、外側継手部材５５と継手内輪５９とケージ６０とトルク伝達ボール６１とからなり、外側継手部材５５は、カップ状のマウス部６２と、このマウス部６２の底部をなす肩部６３と、この肩部６３から軸方向に延びる軸部６４とを一体に有している。軸部６４の外周にはセレーション６４ａが形成され、ハブ輪５０の内周に形成されたセレーション５０ｃに係合してトルク伝達可能としている。また、外側継手部材５５の外周には、インナー側のシール６５が摺接するシールランド部から内側転走面５５ａおよび軸部６４に亙って高周波焼入れによって所定の硬化層が形成されている。   The constant velocity universal joint 52 includes an outer joint member 55, a joint inner ring 59, a cage 60, and a torque transmission ball 61. The outer joint member 55 includes a cup-shaped mouth portion 62 and a shoulder that forms the bottom portion of the mouth portion 62. A portion 63 and a shaft portion 64 extending in the axial direction from the shoulder portion 63 are integrally provided. A serration 64a is formed on the outer periphery of the shaft portion 64, and engages with a serration 50c formed on the inner periphery of the hub wheel 50 so that torque can be transmitted. Further, a predetermined hardened layer is formed on the outer periphery of the outer joint member 55 by induction quenching from the seal land portion in which the inner seal 65 is in sliding contact to the inner rolling surface 55a and the shaft portion 64.

外方部材５３と内方部材５６との間に形成される環状空間の開口部にはシール６５、６５が装着され、軸受内部に封入された潤滑グリースの漏洩と、外部から軸受内部に雨水やダスト等が侵入するのを防止している。   Seals 65, 65 are attached to the opening portion of the annular space formed between the outer member 53 and the inner member 56, and leakage of lubricating grease sealed inside the bearing and rainwater or the like inside the bearing from the outside. Prevents dust from entering.

また、外側継手部材５５の軸部６４の端部を径方向外方に塑性変形させてハブ輪５０のパイロット部６６内に位置する端面６７に加締め（揺動加締）、この加締部６８により外側継手部材５５がハブ輪５０に軸方向に固定されると共に、ハブ輪５０の小径段部５０ｂの端面と外側継手部材５５の肩部６３を突き合わせ、軸受予圧量の管理を行っている。   Further, the end portion of the shaft portion 64 of the outer joint member 55 is plastically deformed radially outward and is caulked (oscillating caulking) to the end surface 67 located in the pilot portion 66 of the hub wheel 50, and this caulking portion. The outer joint member 55 is fixed to the hub wheel 50 in the axial direction by 68, and the end face of the small diameter step portion 50b of the hub wheel 50 and the shoulder 63 of the outer joint member 55 are abutted to manage the bearing preload amount. .

ここで、ハブ輪５０の端面６７の少なくとも加締部６８と接触する部位を径方向外方に向けてアウター側に傾斜させて形成することにより、加締部６８の接触面積を増大させ、加締部６８の強度を向上させている。
特開２００２−３５６１０１号公報 Here, by forming at least a portion of the end surface 67 of the hub wheel 50 in contact with the caulking portion 68 to be radially outwardly inclined toward the outer side, the contact area of the caulking portion 68 is increased, The strength of the fastening portion 68 is improved.
JP 2002-356101 A

こうした従来の車輪用軸受装置において、加締部６８の強度を図るために、ハブ輪５０の端面６７の少なくとも加締部６８と接触する部位を径方向外方に向けてアウター側に傾斜させて形成し、加締部６８の接触面積を増大させることは有効な手段である。然しながら、加締部６８は、大きなモーメント荷重等が負荷された時においても、充分な耐力を有する強度を確保することが必要となるが、この加締部６８の強度は、外側継手部材５５の軸部６４の外径寸法に依存するため、こうした従来の構造では、軸径を上げない限り強度アップには限界があった。   In such a conventional wheel bearing device, in order to increase the strength of the caulking portion 68, at least a portion of the end surface 67 of the hub wheel 50 that contacts the caulking portion 68 is inclined outwardly in the radial direction. Forming and increasing the contact area of the crimping portion 68 is an effective means. However, it is necessary for the caulking portion 68 to secure a strength having a sufficient proof strength even when a large moment load or the like is applied. The strength of the caulking portion 68 is the same as that of the outer joint member 55. Since it depends on the outer diameter size of the shaft portion 64, in such a conventional structure, there is a limit in increasing the strength unless the shaft diameter is increased.

本発明は、このような事情に鑑みてなされたもので、軽量・コンパクト化と共に、加締部の強度を増大させ、長期間に亘って耐久性を確保した第４世代構造の車輪用軸受装置を提供することを目的としている。   The present invention has been made in view of such circumstances, and is a fourth-generation wheel bearing device having a light weight and a compact size, increased strength of a caulking portion, and ensured durability over a long period of time. 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記載の発明は、ハブ輪と複列の転がり軸受と等速自在継手とがユニット化され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、一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と、この内側転走面から軸方向に延びる軸部が一体に形成された前記等速自在継手の外側継手部材からなる内方部材と、この内方部材と前記外方部材の両転走面間に転動自在に収容された複列の転動体とを備え、前記軸部が前記ハブ輪にセレーションを介して内嵌されると共に、端部を径方向外方に塑性変形させて形成した加締部によって前記ハブ輪に対して前記外側継手部材が軸方向に固定された車輪用軸受装置において、前記加締部が前記ハブ輪の開口端面に揺動加締により形成されると共に、当該加締部が前記ハブ輪のパイロット部よりもアウター側に突出している構成を採用した。   In order to achieve such an object, the invention according to claim 1 of the present invention is a wheel bearing device in which a hub wheel, a double row rolling bearing, and a constant velocity universal joint are unitized. The rolling bearing has an outer member in which a double row outer rolling surface is formed on the inner periphery, and a wheel mounting flange integrally formed at one end, and one end facing the outer rolling surface of the double row on the outer periphery. An inner rolling surface, a hub wheel formed with a cylindrical small-diameter stepped portion extending in the axial direction from the inner rolling surface, and the other inner rolling surface facing the double-row outer rolling surface on the outer periphery; An inner member made of an outer joint member of the constant velocity universal joint integrally formed with a shaft portion extending in the axial direction from the inner rolling surface, and between both rolling surfaces of the inner member and the outer member A plurality of rolling elements housed in a freely rotatable manner, and the shaft portion is fitted into the hub wheel via a serration. In addition, in the wheel bearing device in which the outer joint member is axially fixed to the hub wheel by a caulking portion formed by plastically deforming an end portion radially outward, the caulking portion is A configuration is adopted in which the open end surface of the hub wheel is formed by rocking caulking, and the caulking portion protrudes more outward than the pilot portion of the hub wheel.

このように、ハブ輪と外側継手部材とが揺動加締によって形成された加締部により塑性結合された第４世代構造の車輪用軸受装置において、加締部がハブ輪の開口端面に揺動加締により形成されると共に、当該加締部がハブ輪のパイロット部よりもアウター側に突出しているので、加締部を大径に形成することができ、加締部の根元部に発生する応力を緩和することができる。したがって、軽量・コンパクト化と共に、加締部の強度を増大させ、長期間に亘って耐久性を確保した第４世代構造の車輪用軸受装置を提供することができる。また、加締部がハブ輪のパイロット部よりアウター側に突出して形成されているので、加締治具とパイロット部の角部との干渉はなく、加締治具の形状およびその動きが制約されることはない。   As described above, in the fourth-generation wheel bearing device in which the hub wheel and the outer joint member are plastically coupled by the caulking portion formed by the rocking caulking, the caulking portion swings on the opening end surface of the hub wheel. It is formed by dynamic caulking, and the caulking part protrudes to the outer side from the pilot part of the hub wheel, so the caulking part can be formed with a large diameter and is generated at the root part of the caulking part To relieve stress. Accordingly, it is possible to provide a wheel bearing device having a fourth generation structure that is lightweight and compact, increases the strength of the caulking portion, and ensures durability over a long period of time. In addition, since the caulking part is formed to protrude outward from the pilot part of the hub wheel, there is no interference between the caulking jig and the corner part of the pilot part, and the shape and movement of the caulking jig are restricted. It will never be done.

好ましくは、請求項２に記載の発明のように、前記ハブ輪のセレーションが高周波焼入れによって所定の硬化層が形成されると共に、前記軸部のセレーションに軸線に対して所定のねじれ角が設けられ、アウター側の一部が未焼入れの生のままとされていれば、ハブ輪のセレーションとの係合で、その嵌合部に予圧を付与することができ、回転方向のガタを抑制して車両の走行安定性を向上させることができる。   Preferably, as in the invention according to claim 2, a predetermined hardened layer is formed by induction hardening in the serration of the hub wheel, and a predetermined twist angle with respect to the axis is provided in the serration of the shaft portion. If a part of the outer side is left unquenched raw, it is possible to apply a preload to the fitting portion by engaging with the serration of the hub wheel, and to suppress backlash in the rotational direction. The running stability of the vehicle can be improved.

また、請求項３に記載の発明のように、前記軸部が中空状に形成されると共に、前記ハブ輪の車輪取付フランジの位置に対応する部位に底部が形成されていれば、装置の剛性を確保しつつ、軽量化を図ることができると共に、加締めによってセレーションの密着度が高まり回転方向のガタを抑制することができる。さらには、軸受部の放熱効果を高め、運転中の昇温を抑制して耐久性を向上させることができる。   Further, as in the invention described in claim 3, if the shaft portion is formed in a hollow shape and a bottom portion is formed at a portion corresponding to the position of the wheel mounting flange of the hub wheel, the rigidity of the device is increased. While securing the above, weight reduction can be achieved, and the degree of close contact of serration can be increased by caulking, and play in the rotational direction can be suppressed. Furthermore, the heat dissipation effect of the bearing portion can be enhanced, and the temperature rise during operation can be suppressed and the durability can be improved.

また、請求項４記載に記載の発明のように、前記軸部における端部の加締前の形状が、先端部の肉厚が根元部の肉厚よりも大きくなるよう先端に向って漸増する形状に形成されていれば、加締加工の初期にポンチ等の加締治具によって押し広げられる肉量が多くなるため、ハブ輪の円筒部を塑性変形させる軸方向寸法が短くて済むと共に、加締治具形状に早期に充足し易く、外側継手部材を強固に固定することができる。   Further, as in the invention described in claim 4, the shape of the shaft portion before crimping is gradually increased toward the tip so that the thickness of the tip portion is larger than the thickness of the root portion. If it is formed into a shape, the amount of meat that can be expanded by a caulking jig such as a punch in the initial stage of caulking increases, so the axial dimension for plastic deformation of the cylindrical portion of the hub wheel can be shortened, It is easy to satisfy the caulking jig shape at an early stage, and the outer joint member can be firmly fixed.

本発明に係る車輪用軸受装置は、ハブ輪と複列の転がり軸受と等速自在継手とがユニット化され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、一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と、この内側転走面から軸方向に延びる軸部が一体に形成された前記等速自在継手の外側継手部材からなる内方部材と、この内方部材と前記外方部材の両転走面間に転動自在に収容された複列の転動体とを備え、前記軸部が前記ハブ輪にセレーションを介して内嵌されると共に、端部を径方向外方に塑性変形させて形成した加締部によって前記ハブ輪に対して前記外側継手部材が軸方向に固定された車輪用軸受装置において、前記加締部が前記ハブ輪の開口端面に揺動加締により形成されると共に、当該加締部が前記ハブ輪のパイロット部よりもアウター側に突出しているので、加締部を大径に形成することができ、加締部の根元部に発生する応力を緩和することができる。したがって、軽量・コンパクト化と共に、加締部の強度を増大させ、長期間に亘って耐久性を確保した第４世代構造の車輪用軸受装置を提供することができる。また、加締部がハブ輪のパイロット部よりアウター側に突出して形成されているので、加締治具とパイロット部の角部との干渉はなく、加締治具の形状および動きが制約されることはない。   A wheel bearing device according to the present invention is a wheel bearing device in which a hub wheel, a double row rolling bearing, and a constant velocity universal joint are unitized, and the double row rolling bearing has a double row on an inner periphery. An outer rolling surface formed with the outer rolling surface, a wheel mounting flange at one end, and an inner rolling surface facing the double row outer rolling surface on the outer periphery, and the inner rolling surface. A hub wheel formed with a cylindrical small-diameter stepped portion extending in the axial direction from the running surface, the other inner rolling surface facing the outer rolling surface of the double row on the outer periphery, and the axial direction from the inner rolling surface An inner member composed of an outer joint member of the constant velocity universal joint integrally formed with a shaft portion extending in the direction of the shaft, and a plurality of rolls accommodated between both rolling surfaces of the inner member and the outer member. And the shaft portion is fitted into the hub wheel via serrations, and the end portion is radially outward In the wheel bearing device in which the outer joint member is fixed to the hub wheel in the axial direction by a caulking portion formed by plastic deformation of the caulking portion, the caulking portion is swung caulking to the opening end surface of the hub wheel. And the caulking portion protrudes to the outer side from the pilot portion of the hub wheel, so that the caulking portion can be formed with a large diameter, and the stress generated at the root portion of the caulking portion Can be relaxed. Accordingly, it is possible to provide a wheel bearing device having a fourth generation structure that is lightweight and compact, increases the strength of the caulking portion, and ensures durability over a long period of time. In addition, since the caulking part is formed to protrude outward from the pilot part of the hub wheel, there is no interference between the caulking jig and the corner part of the pilot part, and the shape and movement of the caulking jig are restricted. Never happen.

ハブ輪と複列の転がり軸受と等速自在継手とがユニット化され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、一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と、この内側転走面から軸方向に延びる軸部が一体に形成された前記等速自在継手の外側継手部材からなる内方部材と、この内方部材と前記外方部材の両転走面間に転動自在に収容された複列の転動体とを備え、前記軸部が前記ハブ輪にセレーションを介して内嵌されると共に、端部を径方向外方に塑性変形させて形成した加締部によって前記ハブ輪に対して前記外側継手部材が軸方向に固定された車輪用軸受装置において、前記ハブ輪のセレーションが高周波焼入れによって所定の硬化層が形成され、前記軸部のセレーションに軸線に対して所定のねじれ角が設けられ、アウター側の一部が未焼入れの生のままとされると共に、前記加締部が前記ハブ輪の開口端面に揺動加締により形成され、この加締部が前記ハブ輪のパイロット部よりもアウター側に突出している。   A wheel bearing device in which a hub wheel, a double row rolling bearing, and a constant velocity universal joint are unitized, wherein the double row rolling bearing has an outer periphery formed with a double row outer rolling surface. And a cylindrical member extending in the axial direction from the inner rolling surface, and one inner rolling surface facing the outer rolling surface of the double row on the outer periphery. A hub wheel formed with a small diameter step portion, the other inner rolling surface facing the outer rolling surface of the double row on the outer periphery, and a shaft portion extending in the axial direction from the inner rolling surface are integrally formed. An inner member composed of an outer joint member of the constant velocity universal joint, and a double row rolling element that is accommodated so as to roll freely between both rolling surfaces of the inner member and the outer member. Clamping formed by fitting the end part into the hub wheel via serrations and plastically deforming the end part radially outward In the wheel bearing device in which the outer joint member is fixed in the axial direction with respect to the hub wheel, a predetermined hardened layer is formed by induction hardening in the serration of the hub wheel, and the serration of the shaft portion is A predetermined torsion angle is provided, a part of the outer side is left unquenched, and the caulking portion is formed by swing caulking on the opening end surface of the hub wheel. Protrudes outward from the pilot part of the hub wheel.

以下、本発明の実施の形態を図面に基づいて詳細に説明する。
図１は、本発明に係る車輪用軸受装置の一実施形態を示す縦断面図、図２（ａ）は、図１の車輪用軸受装置の組立工程を示す説明図、（ｂ）は、加締工程を示す説明図である。なお、以下の説明では、車両に組み付けた状態で車両の外側寄りとなる側をアウター側（図面左側）、中央寄り側をインナー側（図面右側）という。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing an embodiment of a wheel bearing device according to the present invention, FIG. 2 (a) is an explanatory view showing an assembly process of the wheel bearing device of FIG. 1, and FIG. It is explanatory drawing which shows a fastening process. In the following description, the side closer to the outer side of the vehicle in a state assembled to the vehicle is referred to as the outer side (left side in the drawing), and the side closer to the center is referred to as the inner side (right side in the drawing).

この車輪用軸受装置は第４世代と称され、ハブ輪１と複列の転がり軸受２および等速自在継手３とがユニット化して構成されている。複列の転がり軸受２は、外方部材４と内方部材５と複列の転動体（ボール）６、６とを備えている。内方部材５は、ハブ輪１と、このハブ輪１にトルク伝達可能に内嵌された後述する外側継手部材１４とからなる。   This wheel bearing device is referred to as a fourth generation, and includes a hub wheel 1, a double row rolling bearing 2 and a constant velocity universal joint 3 as a unit. The double-row rolling bearing 2 includes an outer member 4, an inner member 5, and double-row rolling elements (balls) 6 and 6. The inner member 5 includes a hub wheel 1 and an outer joint member 14 (described later) fitted in the hub wheel 1 so as to be able to transmit torque.

外方部材４は、Ｓ５３Ｃ等の炭素０．４０〜０．８０ｗｔ％を含む中炭素鋼からなり、外周に車体（図示せず）に取り付けるための車体取付フランジ４ｂを一体に有し、内周に円弧状の複列の外側転走面４ａ、４ａが形成されている。この複列の外側転走面４ａ、４ａは、高周波焼入れによって表面硬さを５８〜６４ＨＲＣの範囲に硬化処理されている。   The outer member 4 is made of medium carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and integrally has a vehicle body mounting flange 4b for mounting to a vehicle body (not shown) on the outer periphery. Arc-shaped double-row outer rolling surfaces 4a and 4a are formed. The double row outer rolling surfaces 4a, 4a are hardened by induction hardening to a surface hardness of 58 to 64 HRC.

一方、ハブ輪１はＳ５３Ｃ等の炭素０．４０〜０．８０ｗｔ％を含む中炭素鋼からなり、アウター側の端部に車輪を取り付けるための車輪取付フランジ７を有し、この車輪取付フランジ７の周方向等配に複数のハブボルト８が植設されている。また、ハブ輪１の外周には、前記複列の外側転走面４ａ、４ａに対向する一方（アウター側）の円弧状の内側転走面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１ｂが形成され、内周にはトルク伝達用のセレーション（またはスプライン）１ｃが形成されている。そして、内周のセレーション１ｃの部位と、アウター側のシール１０が摺接するシールランド部７ａから内側転走面１ａおよび小径段部１ｂの端面に亙って高周波焼入れによって表面硬さを５８〜６４ＨＲＣの範囲に所定の硬化層１２、１３が形成されている。これにより、セレーション１ｃと車輪取付フランジ７の基部となるシールランド部７ａの耐摩耗性が向上するばかりでなく、車輪取付フランジ７に負荷される回転曲げ荷重に対して充分な機械的強度を有し、ハブ輪１の耐久性が向上する。   On the other hand, the hub wheel 1 is made of medium carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and has a wheel mounting flange 7 for mounting a wheel to an end portion on the outer side. A plurality of hub bolts 8 are planted at equal intervals in the circumferential direction. Also, on the outer periphery of the hub wheel 1, one (outer side) arcuate inner rolling surface 1a facing the double row outer rolling surfaces 4a, 4a, and an axial direction from the inner rolling surface 1a. An extending cylindrical small-diameter step portion 1b is formed, and a serration (or spline) 1c for torque transmission is formed on the inner periphery. Then, the surface hardness is set to 58 to 64 HRC by induction hardening from the seal land portion 7a in which the outer peripheral seal 10 is in sliding contact with the inner peripheral serration 1c portion to the inner rolling surface 1a and the end surface of the small diameter step portion 1b. Predetermined hardened layers 12 and 13 are formed in the range. As a result, not only the wear resistance of the seal land 7a which is the base of the serration 1c and the wheel mounting flange 7 is improved, but also sufficient mechanical strength against the rotational bending load applied to the wheel mounting flange 7 is obtained. In addition, the durability of the hub wheel 1 is improved.

等速自在継手３は、外側継手部材１４と継手内輪１５、ケージ１６、およびトルク伝達ボール１７とからなる。外側継手部材１４はＳ５３Ｃ等の炭素０．４０〜０．８０ｗｔ％を含む中炭素鋼からなり、カップ状のマウス部１８と、このマウス部１８の底部をなす肩部１９と、この肩部１９から軸方向に延びる円筒状の軸部２０とが一体に形成されている。この軸部２０には、ハブ輪１の小径段部１ｂに所定の径方向すきまを介して円筒嵌合するインロウ部２０ａと底部２０ｂが形成され、この底部２０ｂの外周にハブ輪１のセレーション１ｃに係合するセレーション（またはスプライン）２０ｃが形成されている。ここで、軸部２０のセレーション２０ｃには、軸線に対して所定のねじれ角が設けられている。このねじれ角により、ハブ輪１のセレーション１ｃとの係合で、その嵌合部に予圧を付与することができ、回転方向のガタを抑制して車両の走行安定性を向上させることができる。なお、ハブ輪１の車輪取付フランジ７の位置に対応する部位に底部２０ｂが形成されているので、装置の剛性を確保しつつ、軽量化を図ることができると共に、加締めによってセレーションの密着度が高まり回転方向のガタを抑制することができる。さらには、軸受部の放熱効果を高め、運転中の昇温を抑制して耐久性を向上させることができる。   The constant velocity universal joint 3 includes an outer joint member 14, a joint inner ring 15, a cage 16, and a torque transmission ball 17. The outer joint member 14 is made of medium carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and has a cup-shaped mouth portion 18, a shoulder portion 19 that forms the bottom portion of the mouth portion 18, and the shoulder portion 19. And a cylindrical shaft portion 20 extending in the axial direction are integrally formed. The shaft portion 20 is formed with an inrow portion 20a and a bottom portion 20b that are cylindrically fitted to the small-diameter step portion 1b of the hub wheel 1 through a predetermined radial clearance, and the serration 1c of the hub wheel 1 is formed on the outer periphery of the bottom portion 20b. Serrations (or splines) 20c are formed to engage with each other. Here, the serration 20c of the shaft portion 20 is provided with a predetermined twist angle with respect to the axis. Due to this twist angle, the engagement of the hub wheel 1 with the serration 1c makes it possible to apply a preload to the fitting portion, thereby suppressing the play in the rotational direction and improving the running stability of the vehicle. In addition, since the bottom part 20b is formed in the site | part corresponding to the position of the wheel mounting flange 7 of the hub wheel 1, while ensuring the rigidity of an apparatus, it can achieve weight reduction and the adhesion degree of serration by crimping And the backlash in the rotation direction can be suppressed. Furthermore, the heat dissipation effect of the bearing portion can be enhanced, and the temperature rise during operation can be suppressed and the durability can be improved.

ここで、本実施形態では、軸部２０の端部を径方向外方に塑性変形させてハブ輪１の開口端面２１に揺動加締めされ、加締部２２が形成されている。そして、小径段部１ｂの端面が肩部１９に衝合して突き合わされ、複列の転がり軸受２に所定の予圧付与された状態で、この加締部２２によって、ハブ輪１と外側継手部材１４とが一体に塑性結合されている。このように、加締部２２がハブ輪１の開口端面２１に露出して形成されているので、加締部２２を大径に形成することができ、加締部２２の根元部に発生する応力を緩和することができる。したがって、軽量・コンパクト化と共に、加締部２２の強度を増大させ、長期間に亘って耐久性を確保した第４世代構造の車輪用軸受装置を提供することができる。   Here, in the present embodiment, the end portion of the shaft portion 20 is plastically deformed outward in the radial direction, and is swung and swaged to the opening end surface 21 of the hub wheel 1 to form a swaged portion 22. The end face of the small-diameter stepped portion 1b is abutted against the shoulder portion 19 and a predetermined preload is applied to the double-row rolling bearing 2 by the caulking portion 22 so that the hub wheel 1 and the outer joint member are joined. 14 are integrally plastically coupled. In this way, the caulking portion 22 is formed so as to be exposed at the opening end surface 21 of the hub wheel 1, so that the caulking portion 22 can be formed with a large diameter and is generated at the root portion of the caulking portion 22. Stress can be relaxed. Accordingly, it is possible to provide a wheel bearing device having a fourth generation structure that is lightweight and compact, increases the strength of the caulking portion 22, and ensures durability over a long period of time.

また、従来の車輪用軸受装置においては、図示はしないが、パイロット部２３内に位置するハブ輪の端部が凹んで形成され、この凹所の端面に揺動加締めして加締部が形成されるため、加締治具がパイロット部２３の角部に干渉しないように、加締治具の形状および動きが制約されていたが、本実施形態のように、加締部２２がハブ輪１の開口端面２１に露出して形成されるため、加締治具とパイロット部２３の角部との干渉はなく、加締治具の形状および動きが制約されることはない。   In addition, in the conventional wheel bearing device, although not shown, the end of the hub wheel located in the pilot portion 23 is formed to be recessed, and the end portion of the recess is swung and caulked to provide a caulking portion. Therefore, the shape and movement of the crimping jig are restricted so that the crimping jig does not interfere with the corners of the pilot part 23. However, as in this embodiment, the crimping part 22 is a hub. Since it is formed to be exposed at the opening end surface 21 of the wheel 1, there is no interference between the crimping jig and the corners of the pilot portion 23, and the shape and movement of the crimping jig are not restricted.

また、マウス部１８の内周には軸方向に延びる曲線状のトラック溝１８ａが形成されると共に、継手内輪１５の外周にこのトラック溝１８ａに対応するトラック溝１５ａが形成され、これら両トラック溝１８ａ、１５ａ間にケージ１６を介してトルク伝達ボール１７が収容されている。また、肩部１９の外周には、前記複列の外側転走面４ａ、４ａに対向する他方（インナー側）の円弧状の内側転走面１４ａが形成されている。そして、トラック溝１８ａと、インナー側のシール１１が嵌合する外周面から内側転走面１４ａおよび軸部２０のインロウ部２０ａに亙って高周波焼入れによって表面硬さを５８〜６４ＨＲＣの範囲に所定の硬化層２４、２５が形成されている。これにより、トラック溝１８ａと肩部１９の外周面の耐摩耗性が向上するばかりでなく、負荷される回転曲げ荷重に対して充分な機械的強度を有し、外側継手部材１４の耐久性が向上する。   Further, a curved track groove 18a extending in the axial direction is formed on the inner periphery of the mouth portion 18, and a track groove 15a corresponding to the track groove 18a is formed on the outer periphery of the joint inner ring 15, and both the track grooves are formed. A torque transmission ball 17 is accommodated via a cage 16 between 18a and 15a. Further, the other (inner side) arcuate inner rolling surface 14a is formed on the outer periphery of the shoulder 19 so as to face the double row outer rolling surfaces 4a, 4a. Then, the surface hardness is set within a range of 58 to 64 HRC by induction hardening from the outer peripheral surface where the track groove 18a and the inner seal 11 are fitted to the inner rolling surface 14a and the inrow portion 20a of the shaft portion 20. The hardened layers 24 and 25 are formed. As a result, not only the wear resistance of the outer peripheral surfaces of the track groove 18a and the shoulder portion 19 is improved, but also the mechanical strength is sufficient with respect to the applied rotational bending load, and the durability of the outer joint member 14 is improved. improves.

外方部材４の複列の外側転走面４ａ、４ａと、これらに対向する複列の内側転走面１ａ、１４ａ間には複列の転動体６、６が収容され、保持器９、９によって転動自在に保持されている。また、外方部材４の端部にはシール１０、１１が装着され、軸受内部に封入された潤滑グリースの漏洩と、外部から軸受内部に雨水やダスト等が侵入するのを防止している。これらの複列の転がり軸受２は、両転走面４ａ、１ａおよび４ａ、１４ａに加わる力の作用方向の作用線が軸心に向うほど軸方向に離反する、所謂背面合せタイプの複列アンギュラ玉軸受を構成している。なお、ここでは、転動体６にボールを使用した複列アンギュラ玉軸受を例示したが、本発明に係る車輪用軸受装置は、これに限らず、転動体６に円錐ころを用いた複列円錐ころ軸受であっても良い。   Double row rolling elements 6 and 6 are accommodated between the double row outer raceway surfaces 4a and 4a of the outer member 4 and the double row inner raceway surfaces 1a and 14a opposed to these, and the cage 9, 9 is held by a roller 9. Further, seals 10 and 11 are attached to the end portion of the outer member 4 to prevent leakage of the lubricating grease sealed inside the bearing and intrusion of rainwater, dust and the like into the bearing from the outside. These double-row rolling bearings 2 are so-called back-to-back type double-row angular bearings in which the action lines of the acting directions of the forces applied to the rolling surfaces 4a, 1a and 4a, 14a are separated in the axial direction as they approach the axial center. It constitutes a ball bearing. Here, a double-row angular contact ball bearing using balls as the rolling elements 6 is illustrated, but the wheel bearing device according to the present invention is not limited to this, and a double-row conical roller using tapered rollers as the rolling elements 6. It may be a roller bearing.

アウター側のシール１０は、一対のサイドリップを有する単一のシール部材で構成され車輪取付フランジ７の基部となるシールランド部７ａに摺接している。一方、インナー側のシール１１は、断面略Ｌ字状に形成され、互いに対向配置された環状のシール板１１ａとスリンガ１１ｂとからなる複合型シール、所謂パックシールで構成されている。すなわち、環状のシール板１１ａは、外方部材４の端部に内嵌され、スリンガ１１ｂに摺接するサイドリップとラジアルリップを備えている。   The seal 10 on the outer side is composed of a single seal member having a pair of side lips, and is in sliding contact with a seal land portion 7 a that is a base portion of the wheel mounting flange 7. On the other hand, the seal 11 on the inner side is formed of a so-called pack seal, which is a composite seal formed of an annular seal plate 11a and a slinger 11b which are formed in a substantially L-shaped cross section and are arranged to face each other. In other words, the annular seal plate 11a includes a side lip and a radial lip that are fitted into the end portion of the outer member 4 and are in sliding contact with the slinger 11b.

次に、図２（ａ）、（ｂ）を用いてハブ輪１と複列の転がり軸受２および等速自在継手３のユニット化の方法について詳細に説明する。
まず、図２（ａ）に示すように、外方部材４の複列の外側転走面４ａ、４ａに保持器９、９を介して複列の転動体６、６が仮組みされると共に、外方部材４のアウター側の端部にシール１０と、インナー側の端部にシール１１を構成するシール板１１ａが装着される。次に、外方部材４の両側からハブ輪１と、スリンガ１１ｂが圧入された外側継手部材１４が内挿される。そして、ハブ輪１の小径段部１ｂの端面に外側継手部材１４の肩部１９が衝合され、突き合わせ状態になるまでハブ輪１に外側継手部材１４の軸部２０がセレーション１ｃ、２０ｃを介して内嵌される。 Next, a method of unitizing the hub wheel 1, the double row rolling bearing 2 and the constant velocity universal joint 3 will be described in detail with reference to FIGS. 2 (a) and 2 (b).
First, as shown in FIG. 2A, the double-row rolling elements 6 and 6 are temporarily assembled to the double-row outer rolling surfaces 4a and 4a of the outer member 4 via the cages 9 and 9, respectively. The seal 10 is mounted on the outer end of the outer member 4 and the seal plate 11a constituting the seal 11 is mounted on the inner end. Next, the hub wheel 1 and the outer joint member 14 into which the slinger 11b is press-fitted are inserted from both sides of the outer member 4. Then, the shoulder portion 19 of the outer joint member 14 is abutted against the end face of the small-diameter stepped portion 1b of the hub wheel 1, and the shaft portion 20 of the outer joint member 14 passes through the serrations 1c and 20c until the hub wheel 1 is brought into a butted state. Fitted inside.

その後、図２（ｂ）に示すように、軸部２０の端部を径方向外方に塑性変形させてハブ輪１の開口端面２１に加締治具２６で揺動加締めされ、この加締部２２により外側継手部材１４がハブ輪１に対して軸方向に固定される。また、この揺動加締によりハブ輪１の小径段部１ｂの端面と外側継手部材１４の肩部１９が突き合わされ、軸受部が所定の予圧量に管理される。こうした製造方法を採用することにより、加締治具２６の形状や動きが制約を受けず、加締工程が簡便化できる。また、加締部２２の強度が増大し、長期間に亘って加締部２２の耐久性が確保できると共に、長期間その予圧量を維持することができる。   After that, as shown in FIG. 2 (b), the end of the shaft portion 20 is plastically deformed radially outward, and is swung and swaged to the open end surface 21 of the hub wheel 1 by a crimping jig 26. The outer joint member 14 is fixed to the hub wheel 1 in the axial direction by the fastening portion 22. Further, by this rocking caulking, the end face of the small-diameter stepped portion 1b of the hub wheel 1 and the shoulder portion 19 of the outer joint member 14 are brought into contact with each other, and the bearing portion is managed to a predetermined preload amount. By adopting such a manufacturing method, the shape and movement of the crimping jig 26 are not restricted, and the crimping process can be simplified. Further, the strength of the crimping portion 22 is increased, the durability of the crimping portion 22 can be ensured over a long period of time, and the preload amount can be maintained for a long period of time.

ここで、図２（ａ）に示すように、軸部２０の端部における加締前の形状が、先端部の肉厚ｔ１が根元部の肉厚ｔ２よりも大きくなるよう先端に向って漸増する形状に形成されている。加締前の先端部の形状をこのような形状にすることにより、加締加工の初期にポンチ等の加締治具２６によって押し広げられる肉量が多くなるため、塑性変形させる軸方向寸法が短くて済むと共に、加締治具２６の形状に早期に充足し易く、ハブ輪１と外側継手部材１４とを強固に固定することができる。   Here, as shown in FIG. 2A, the shape before caulking at the end of the shaft portion 20 gradually increases toward the tip so that the thickness t1 of the tip is larger than the thickness t2 of the root. It is formed in the shape to do. By making the shape of the tip portion before caulking into such a shape, the amount of the wall that is pushed and spread by the caulking jig 26 such as a punch in the initial stage of caulking increases, so that the axial dimension for plastic deformation can be reduced. While being short, it is easy to satisfy the shape of the crimping jig 26 at an early stage, and the hub wheel 1 and the outer joint member 14 can be firmly fixed.

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、ハブ輪と複列の転がり軸受と等速自在継手とがユニット化された第４世代構造の車輪用軸受装置に適用することができる。   The wheel bearing device according to the present invention can be applied to a wheel bearing device having a fourth generation structure in which a hub wheel, a double row rolling bearing, and a constant velocity universal joint are unitized.

本発明に係る車輪用軸受装置の一実施形態を示す縦断面図である。It is a longitudinal section showing one embodiment of a wheel bearing device concerning the present invention. （ａ）は、図１の車輪用軸受装置の組立工程を示す説明図である。 （ｂ）は、同上加締工程を示す説明図である。(A) is explanatory drawing which shows the assembly process of the bearing apparatus for wheels of FIG. (B) is explanatory drawing which shows a caulking process same as the 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.

符号の説明Explanation of symbols

１・・・・・・・・・・・・・・・・ハブ輪
１ａ、１４ａ・・・・・・・・・・・内側転走面
１ｂ・・・・・・・・・・・・・・・小径段部
１ｃ、２０ｃ・・・・・・・・・・・セレーション
２・・・・・・・・・・・・・・・・複列の転がり軸受
３・・・・・・・・・・・・・・・・等速自在継手
４・・・・・・・・・・・・・・・・外方部材
４ａ・・・・・・・・・・・・・・・外側転走面
４ｂ・・・・・・・・・・・・・・・車体取付フランジ
５・・・・・・・・・・・・・・・・内方部材
６・・・・・・・・・・・・・・・・転動体
７・・・・・・・・・・・・・・・・車輪取付フランジ
７ａ・・・・・・・・・・・・・・・シールランド部
８・・・・・・・・・・・・・・・・ハブボルト
９・・・・・・・・・・・・・・・・保持器
１０・・・・・・・・・・・・・・・アウター側のシール
１１・・・・・・・・・・・・・・・インナー側のシール
１１ａ・・・・・・・・・・・・・・シール板
１１ｂ・・・・・・・・・・・・・・スリンガ
１２、１３、２４、２５・・・・・・硬化層
１４・・・・・・・・・・・・・・・外側継手部材
１５・・・・・・・・・・・・・・・継手内輪
１５ａ、１８ａ・・・・・・・・・・トラック溝
１６・・・・・・・・・・・・・・・ケージ
１７・・・・・・・・・・・・・・・トルク伝達ボール
１８・・・・・・・・・・・・・・・マウス部
１９・・・・・・・・・・・・・・・肩部
２０・・・・・・・・・・・・・・・軸部
２０ａ・・・・・・・・・・・・・・インロウ部
２０ｂ・・・・・・・・・・・・・・底部
２１・・・・・・・・・・・・・・・開口端面
２２・・・・・・・・・・・・・・・加締部
２３・・・・・・・・・・・・・・・パイロット部
２６・・・・・・・・・・・・・・・加締治具
５０・・・・・・・・・・・・・・・ハブ輪
５０ａ、５５ａ・・・・・・・・・・内側転走面
５１・・・・・・・・・・・・・・・複列の転がり軸受
５２・・・・・・・・・・・・・・・等速自在継手
５３・・・・・・・・・・・・・・・外方部材
５３ａ・・・・・・・・・・・・・・外側転走面
５４・・・・・・・・・・・・・・・車輪取付フランジ
５５・・・・・・・・・・・・・・・外側継手部材
５６・・・・・・・・・・・・・・・内方部材
５７・・・・・・・・・・・・・・・ボール
５８・・・・・・・・・・・・・・・保持器
５９・・・・・・・・・・・・・・・継手内輪
６０・・・・・・・・・・・・・・・ケージ
６１・・・・・・・・・・・・・・・トルク伝達ボール
６２・・・・・・・・・・・・・・・マウス部
６３・・・・・・・・・・・・・・・肩部
６４・・・・・・・・・・・・・・・軸部
６５・・・・・・・・・・・・・・・シール
６６・・・・・・・・・・・・・・・パイロット部
６７・・・・・・・・・・・・・・・端面
６８・・・・・・・・・・・・・・・加締部
ｔ１・・・・・・・・・・・・・・・軸部の先端部の肉厚
ｔ２・・・・・・・・・・・・・・・軸部の根元部の肉厚 1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hub wheel 1a, 14a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner rolling surface 1b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・... Small diameter step 1c, 20c ... Serration 2 ... Double row rolling bearing 3 ...・ ・ ・ ・ ・ ・ ・ ・ Constant velocity universal joint 4 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outer member 4a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・Outer rolling surface 4b ... Body mounting flange 5 ... Inner member 6 ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rolling element 7 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Wheel mounting flange 7a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Seal land Part 8 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hub Bolt 9 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hold 10 ... Outer side seal 11 ... Inner side seal 11a ... ········ Seal plate 11b ············ Slinger 12, 13, 24, 25 ··································· Outer joint member 15 ... Inner joint rings 15a, 18a ... Track groove 16 ...・ ・ ・ ・ ・ ・ Cage 17 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Torque transmission ball 18 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Mouse 19・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Shoulder 20 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Shaft 20a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ In-row 20b ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Bottom 21 …… ···························································································· ································································································· Rolling surface 51 ... Double row rolling bearing 52 ... Constant velocity universal joint 53 ... ............ Outer member 53a ......... Outer rolling surface 54 ......... Wheel mounting Flange 55 ... outer joint member 56 ... inner member 57 ... ... Ball 58 ... Cage 59 ... ... Joint inner ring 60 ... Cage 61 ... Torque transmission ball 62 ...・ ・ ・ ・ ・ ・ ・ Mouse 63 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Shoulder 64 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Shaft 65 ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Seal 66 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Pilot part 67 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ End face 68 ・ ・········································································ Thickness t2 at the tip of the shaft .... Wall thickness at the base of the shaft

Claims (4)

ハブ輪と複列の転がり軸受と等速自在継手とがユニット化され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、
一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と、この内側転走面から軸方向に延びる軸部が一体に形成された前記等速自在継手の外側継手部材からなる内方部材と、
この内方部材と前記外方部材の両転走面間に転動自在に収容された複列の転動体とを備え、
前記軸部が前記ハブ輪にセレーションを介して内嵌されると共に、端部を径方向外方に塑性変形させて形成した加締部によって前記ハブ輪に対して前記外側継手部材が軸方向に固定された車輪用軸受装置において、
前記加締部が前記ハブ輪の開口端面に揺動加締により形成されると共に、当該加締部が前記ハブ輪のパイロット部よりもアウター側に突出し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 wheel, a double row rolling bearing and a constant velocity universal joint 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,
One end has a wheel mounting flange integrally, and on the outer periphery is one inner rolling surface facing the double row outer rolling surface, and a cylindrical small-diameter step portion extending in the axial direction from the inner rolling surface. The above-described constant velocity freely in which the formed hub wheel, the other inner rolling surface facing the outer rolling surface of the double row on the outer periphery, and the shaft portion extending in the axial direction from the inner rolling surface are integrally formed. An inner member made of an outer joint member of the joint;
A double row rolling element housed in a freely rolling manner between the rolling surfaces of the inner member and the outer member;
The outer joint member is axially fitted to the hub wheel by a crimping portion formed by the shaft portion being fitted into the hub wheel via serrations and plastically deforming the end portion radially outward. In a fixed wheel bearing device,
The wheel bearing device, wherein the caulking portion is formed on the opening end surface of the hub wheel by swing caulking, and the caulking portion protrudes to the outer side from the pilot portion of the hub wheel. . 前記ハブ輪のセレーションが高周波焼入れによって所定の硬化層が形成されると共に、前記軸部のセレーションに軸線に対して所定のねじれ角が設けられ、アウター側の一部が未焼入れの生のままとされている請求項１に記載の車輪用軸受装置。   A predetermined hardened layer is formed by induction hardening of the hub ring, and a predetermined twist angle with respect to the axis is provided in the serration of the shaft portion, and a part of the outer side remains unquenched raw. The wheel bearing device according to claim 1, wherein 前記軸部が中空状に形成されると共に、前記ハブ輪の車輪取付フランジの位置に対応する部位に底部が形成されている請求項１または２に記載の車輪用軸受装置。   The wheel bearing device according to claim 1 or 2, wherein the shaft portion is formed in a hollow shape, and a bottom portion is formed at a portion corresponding to a position of a wheel mounting flange of the hub wheel. 前記軸部における端部の加締前の形状が、先端部の肉厚が根元部の肉厚よりも大きくなるよう先端に向って漸増する形状に形成されている請求項１乃至３いずれかに記載の車輪用軸受装置。   The shape before caulking of the end portion of the shaft portion is formed in a shape that gradually increases toward the tip so that the thickness of the tip portion is larger than the thickness of the root portion. The wheel bearing device described.
JP2005361756A 2005-12-15 2005-12-15 Bearing device for wheel Pending JP2007161147A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009054214A1 (en) * 2007-10-22 2009-04-30 Ntn Corporation Constant speed universal joint
EP2202419A4 (en) * 2007-10-23 2017-07-05 NTN Corporation Fixed constant velocity universal joint

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001354004A (en) * 2000-04-12 2001-12-25 Ntn Corp Bearing device for driving wheel
JP2002139060A (en) * 2000-08-24 2002-05-17 Ntn Corp Wheel bearing device
JP2002205503A (en) * 2001-01-09 2002-07-23 Koyo Seiko Co Ltd Hub unit for vehicle
JP2002356101A (en) * 2001-05-31 2002-12-10 Ntn Corp Bearing device for driving wheel
JP2003072308A (en) * 2001-08-31 2003-03-12 Ntn Corp Bearing system for driving wheel and its manufacturing method
JP2003074575A (en) * 2001-09-05 2003-03-12 Koyo Seiko Co Ltd Rolling bearing device
JP2003112502A (en) * 2001-10-05 2003-04-15 Ntn Corp Bearing device for driving wheel
JP2003159908A (en) * 2001-11-28 2003-06-03 Nsk Ltd Rotation support device for driving wheel
JP2003175702A (en) * 2001-12-13 2003-06-24 Ntn Corp Bearing device for driving wheel
JP2003202025A (en) * 2002-01-09 2003-07-18 Koyo Seiko Co Ltd Rolling bearing device
JP2004108449A (en) * 2002-09-17 2004-04-08 Koyo Seiko Co Ltd Rolling bearing device
JP2005061556A (en) * 2003-08-18 2005-03-10 Ntn Corp Bearing device for wheel
JP2005188599A (en) * 2003-12-25 2005-07-14 Ntn Corp Bearing device for wheel

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001354004A (en) * 2000-04-12 2001-12-25 Ntn Corp Bearing device for driving wheel
JP2002139060A (en) * 2000-08-24 2002-05-17 Ntn Corp Wheel bearing device
JP2002205503A (en) * 2001-01-09 2002-07-23 Koyo Seiko Co Ltd Hub unit for vehicle
JP2002356101A (en) * 2001-05-31 2002-12-10 Ntn Corp Bearing device for driving wheel
JP2003072308A (en) * 2001-08-31 2003-03-12 Ntn Corp Bearing system for driving wheel and its manufacturing method
JP2003074575A (en) * 2001-09-05 2003-03-12 Koyo Seiko Co Ltd Rolling bearing device
JP2003112502A (en) * 2001-10-05 2003-04-15 Ntn Corp Bearing device for driving wheel
JP2003159908A (en) * 2001-11-28 2003-06-03 Nsk Ltd Rotation support device for driving wheel
JP2003175702A (en) * 2001-12-13 2003-06-24 Ntn Corp Bearing device for driving wheel
JP2003202025A (en) * 2002-01-09 2003-07-18 Koyo Seiko Co Ltd Rolling bearing device
JP2004108449A (en) * 2002-09-17 2004-04-08 Koyo Seiko Co Ltd Rolling bearing device
JP2005061556A (en) * 2003-08-18 2005-03-10 Ntn Corp Bearing device for wheel
JP2005188599A (en) * 2003-12-25 2005-07-14 Ntn Corp Bearing device for wheel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009054214A1 (en) * 2007-10-22 2009-04-30 Ntn Corporation Constant speed universal joint
US8226489B2 (en) 2007-10-22 2012-07-24 Ntn Corporation Constant velocity universal joint
EP2202419A4 (en) * 2007-10-23 2017-07-05 NTN Corporation Fixed constant velocity universal joint

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