JP4513427B2 - Hub unit for wheels - Google Patents

Hub unit for wheels Download PDF

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Publication number
JP4513427B2
JP4513427B2 JP2004177133A JP2004177133A JP4513427B2 JP 4513427 B2 JP4513427 B2 JP 4513427B2 JP 2004177133 A JP2004177133 A JP 2004177133A JP 2004177133 A JP2004177133 A JP 2004177133A JP 4513427 B2 JP4513427 B2 JP 4513427B2
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protruding portion
bearing
point
caulking
inner ring
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JP2006002799A (en
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泰秀 渡辺
剛敏 千布
謹次 湯川
信行 萩原
徹 竹原
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NSK Ltd
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NSK Ltd
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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
    • 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
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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

Description

本発明は、車輪用ハブユニットに関するもので、詳しくは、ハブに外嵌した内輪要素をハブの車両中心側終端部を加締めることにより固定した車輪用ハブユニットに関する。 The present invention relates to a wheel hub unit, and more particularly to a wheel hub unit in which an inner ring element externally fitted to a hub is fixed by caulking a vehicle center side end portion of the hub .

ハブの終端部を加締めることにより内輪要素を固定するハブユニットにおいては、加締め工具により終端部を半径方向外方へ拡開して、内輪要素を固定するが、その際に、加締め後に、内輪要素の軌道寸法や精度の変化など軌道に影響を及ぼす虞もある。   In the hub unit that fixes the inner ring element by caulking the end part of the hub, the inner ring element is fixed by expanding the end part radially outward by a caulking tool. There is also a possibility that the track will be affected by changes in the track size and accuracy of the inner ring element.

このような問題を解決する方法が提案されている。（例えば、特許文献１を参照）。
特開平１０-２７２９０３号公報 A method for solving such a problem has been proposed. (For example, see Patent Document 1).
JP-A-10-272903

しかしながら、特許文献１では、内輪要素の軌道の寸法や精度の変化の問題を対象としているが、本発明は更なる提案として、加締め後の皺の発生防止など外観上の見栄えが改善された車輪用ハブユニットを提供することを目的としている。   However, Patent Document 1 deals with the problem of changes in the dimensions and accuracy of the track of the inner ring element, but the present invention further improves the appearance of the appearance such as prevention of wrinkles after caulking. The object is to provide a wheel hub unit.

上記の目的を達成するため、本発明は、
内周に２列の軸受軌道を有する外輪と、
車両外端側には、車輪取付けフランジを有し、軸方向車両中心側には終端部を有し、前記外輪の軸方向車両外端側の軸受軌道に対応する第１の軸受け軌道を外周に一体または別体に有しているハブと、
前記ハブの前記終端部側に外嵌され、前記外輪の軸方向車両中心側の軸受軌道に対向する第２軸受軌道を外周に有しており、前記ハブの前記終端部の加締めにより前記終端部に固定された内輪要素と、
前記外輪の２つの軸受軌道と、前記第１軸受軌道及び第２軸受軌道との間に介在する転動体と、
を備えた車輪用ハブユニットにおいて、
前記ハブと内輪要素とを加締め固定する前の状態において、前記終端部は、内輪要素の車両中心側端面から突出し、かつ、半径方向内方を空洞部とした突出し部を有すると共に、前記内輪要素の車両中心側端面から前記突出し部端面までの長さ寸法をＡとし、
前記突出し部の先端部には外周面側に起点を有し端面を終点とする面取りを形成し、該面取りの終点は前記終端部の加締め後加締め部の最大径部に位置しており、該面取りの軸方向長さ寸法をＣとし、
前記突出し部の外径寸法と前記空洞部内周の前記突出し部端面における直径寸法との差の２分の１をＢとし、
これら寸法間の関係を、Ａ＞Ｃ＞Ｂ/２としたことを特徴とする車輪用ハブユニットを提供する。 In order to achieve the above object, the present invention provides:
An outer ring having two rows of bearing races on the inner circumference;
A wheel mounting flange is provided on the vehicle outer end side, a terminal portion is provided on the axial vehicle center side, and a first bearing track corresponding to the bearing track on the outer vehicle side of the outer ring in the axial direction is provided on the outer periphery. A hub that is integral or separate, and
A second bearing race which is fitted on the end portion side of the hub and faces a bearing race on the outer ring in the axial direction of the vehicle center is provided on the outer periphery, and the end portion is secured by caulking the end portion of the hub. An inner ring element fixed to the section;
A rolling element interposed between the two bearing raceways of the outer ring, the first bearing raceway and the second bearing raceway,
In the wheel hub unit with
In a state before the hub and the inner ring element are fixed by caulking, the end portion protrudes from the end surface on the vehicle center side of the inner ring element and has a protruding portion with a radially inner side as a hollow portion. A length dimension from the vehicle center side end surface of the element to the protruding portion end surface is A,
A chamfer having a starting point on the outer peripheral surface side and an end surface as an end point is formed at the tip end portion of the protruding portion, and the end point of the chamfer is located at the maximum diameter portion of the caulking portion after the end portion is caulked. , C is the axial length of the chamfer,
One half of the difference between the outer diameter dimension of the protruding portion and the diameter dimension of the inner peripheral surface of the protruding portion at the protruding portion end surface is B,
The wheel hub unit is characterized in that the relationship between these dimensions is A>C> B / 2 .

また、本発明においては、さらに、内輪要素の内周面と車両中心側端面との間に設けた面取り部の前記内周面側の面取り部起点から、前記面取り部の長さと略同一長さ寸法のＤ１点を前記突出し部外周面に設定し、前記突出し部端面から前記Ｄ１点までの長さ寸法をＤとし、前記ＡおよびＣ寸法との関係を、Ａ＞Ｄ＞Ｃとすることが好ましい。 Further, in the present invention , the length of the chamfered portion is substantially the same as the length of the chamfered portion on the inner peripheral surface side of the chamfered portion provided between the inner peripheral surface of the inner ring element and the vehicle center side end surface. set D 1 point dimension on the projecting portion outer peripheral surface, the length from the projecting end surface to said D 1 point is D, the relationship between the a and C dimension, and a>D> C It is preferable .

本発明によれば、加締め後に、内輪要素の軌道寸法や精度の変化などを起こさず、さらに、加締め部に外観を低下させる皺などの発生が生じない車輪用ハブユニットを提供できる。 According to the present invention, it is possible to provide a wheel hub unit that does not cause changes in the track dimensions and accuracy of the inner ring element after caulking, and further does not generate wrinkles that reduce the appearance of the caulking part.

以下、本発明の実施の形態に関わる車輪用ハブユニットを図面を参照しつつ説明する。   Hereinafter, a wheel hub unit according to an embodiment of the present invention will be described with reference to the drawings.

（実施形態１）
図１ないし図３において本発明の実施形態１を説明する。 (Embodiment 1)
A first embodiment of the present invention will be described with reference to FIGS.

図１は実施形態１の車輪用ハブユニットＨｕの断面図である。   FIG. 1 is a cross-sectional view of the wheel hub unit Hu according to the first embodiment.

同図において、ハブ１は、外端側に車輪（図示略）を取付けるためのフランジ１ｆと、軸方向中央部の外周面１ｍのうちフランジ側外周面に直接第１軸受軌道１ａが形成されている。   In the figure, the hub 1 has a flange 1f for attaching a wheel (not shown) on the outer end side, and a first bearing track 1a formed directly on the outer peripheral surface of the flange-side outer peripheral surface 1m of the axially central portion. Yes.

車両中心側の外周面はフランジ側外周面に連なる段部１ｃを介してフランジ側外周面より小径の小径外周部１ｎが設けられ、該小径外周部１ｎの車両中心側（図１中、右方）の終端部１１側は加締め部１ｋにより内輪要素３が加締め固定されている。こうして、内輪要素３がハブ１に加締め固定されて、第１軸受軌道１ａと第２軸受軌道１ｂとの２つの内輪軌道を形成している。   The outer peripheral surface on the vehicle center side is provided with a small-diameter outer peripheral portion 1n having a smaller diameter than the flange-side outer peripheral surface via a step portion 1c connected to the flange-side outer peripheral surface. The inner ring element 3 is caulked and fixed by a caulking portion 1k. In this way, the inner ring element 3 is caulked and fixed to the hub 1 to form two inner ring raceways of the first bearing raceway 1a and the second bearing raceway 1b.

内輪要素３は、その車両中心側の端面３ｕと内輪要素３の内周面３ｙとの間に、円弧面取り部３ｖが形成されていて、ハブ１の終端部１１を加締める際に好適な形状になっている。   The inner ring element 3 is formed with an arc chamfered portion 3v between an end surface 3u on the vehicle center side and an inner peripheral surface 3y of the inner ring element 3, and is suitable for crimping the end portion 11 of the hub 1. It has become.

終端部１１は、ハブ１の材料の一つとして好適な中炭素鋼の未熱処理の硬度（ＨＲＣ１５−２８）程度になっていて、加締めが容易にできる。   The end portion 11 has an unheat-treated hardness (HRC 15-28) of medium carbon steel suitable as one of the materials of the hub 1 and can be easily crimped.

外輪２はハブ１の第１軸受軌道１ａ及び第２軸受軌道１ｂに対応する複列の軸受軌道２ａ、２ｂを有している。外輪２の外周部には車体に取付けられるフランジ２ｆが一体に形成されており、軸方向両端部にはハブ１と外輪２との隙間をシールするシールリング７ａ、７ｂが取付けられている。   The outer ring 2 has double-row bearing tracks 2 a and 2 b corresponding to the first bearing track 1 a and the second bearing track 1 b of the hub 1. Flange 2f attached to the vehicle body is integrally formed on the outer periphery of outer ring 2, and seal rings 7a and 7b for sealing the gap between hub 1 and outer ring 2 are attached to both ends in the axial direction.

ボール４ａ、４ｂは第１軸受軌道１ａ及び第２軸受軌道１ｂと外輪の軸受軌道２ａ、２ｂとの間にそれぞれ介在し、ハブと外輪との相対回転を可能にしている。ボール４ａ、４ｂは保持器５ａ、５ｂにより保持されている。また、フランジ１ｆにはボルト９により車輪（図示略）が取付けられる。   The balls 4a and 4b are respectively interposed between the first bearing raceway 1a and the second bearing raceway 1b and the bearing raceways 2a and 2b of the outer ring to enable relative rotation between the hub and the outer ring. Balls 4a and 4b are held by cages 5a and 5b. A wheel (not shown) is attached to the flange 1f by a bolt 9.

図２は、ハブ１の終端部１１を加締める前の状態を示している。
さらに、図２のＥ部拡大図である図３を参照しながら説明する。
加締める前の状態において、ハブ１の終端部１１は、内輪要素３が外嵌された小径外周部１ｎと、該小径外周部１ｎが内輪要素３の車両中心側の端面３ｕよりも車両中心側に延在した突出し部１１１を構成している。内輪要素３の端面３ｕから突き出し部１１１の端面１１２までの長さ寸法がＡとなるように形成されている。 FIG. 2 shows a state before the end portion 11 of the hub 1 is crimped.
Further, description will be made with reference to FIG.
In a state before caulking, the end portion 11 of the hub 1 includes a small-diameter outer peripheral portion 1n to which the inner ring element 3 is externally fitted, and the small-diameter outer peripheral portion 1n is closer to the vehicle center side than the end surface 3u of the inner ring element 3 on the vehicle center side. The protruding portion 111 extending in the direction is configured. The length dimension from the end surface 3u of the inner ring element 3 to the end surface 112 of the protruding portion 111 is formed to be A.

突出し部１１１は加締めを容易にするために、半径方向内方に空洞部１２が設けられている。空洞部１２は内周面が円筒面１２１になっている。突出し部の先端部には面取り１ｓが形成されている。面取り１ｓは突出し部１１１の先端寄りの点Ｑ１を始点とし、突出し部の端面１１２の点Ｑ２を終点としている。面取り１ｓの軸方向長さ寸法がＣとなるように形成されている。 The protruding portion 111 is provided with a hollow portion 12 inward in the radial direction in order to facilitate caulking. The hollow portion 12 has a cylindrical surface 121 on the inner peripheral surface. A chamfer 1s is formed at the tip of the protruding portion. Chamfering 1s is a point to Q 1 tip side of the projecting portion 111 is a start point, and the end point of the point Q 2 of the end face 112 of the projecting portion. The chamfer 1s is formed such that its axial length is C.

また、小径外周部１ｎの外径寸法、すなわち、突出し部１１１の外径寸法と空洞部１２の内周面の径方向寸法との差の２分の１をＢと定義する。このＢ寸法は、突出し部の肉厚寸法である。   Further, B is defined as a half of the difference between the outer diameter dimension of the small-diameter outer peripheral part 1n, that is, the outer diameter dimension of the protruding part 111 and the radial dimension of the inner peripheral surface of the cavity part 12. This B dimension is the thickness dimension of the protruding portion.

さらに、内輪要素３は内周面３ｙと車両中心側端面３ｕとの間に円弧面取り部３ｖが形成されていて、内周面３ｙの面取り部起点Ｐ１から端面３ｕの終点Ｐ２まで円弧Ａｒｃになっている。面取り部は単一円弧、複合円弧に限定するものではなく、円弧と直線との組み合わせでも良い。 そして、起点Ｐ１から終点Ｐ２までの面取り部の長さに等しい長さを起点Ｐ１から突出し部１１１外周面に設定し、点Ｄ１とする。点Ｄ１から突出し部１１１の端面１１２までの長さ寸法をＤに設定する。 Further, the inner ring element 3 is arc chamfer 3v is not formed between the inner peripheral surface 3y and the vehicle center side end surface 3u, arc Arc from chamfer starting point P 1 of the inner peripheral surface 3y to the end P 2 of the end face 3u It has become. The chamfered portion is not limited to a single arc or a composite arc, but may be a combination of an arc and a straight line. Then, set the length equal to the length of the chamfer from the origin P 1 to the end point P 2 from the starting point P 1 to the projecting portion 111 outer circumferential surface, and the point D 1. The length from the point D 1 to the end face 112 of the projecting portion 111 is set to D.

以上設定したこれらの寸法の関係を、Ａ、Ｂ、Ｃの間を、Ａ＞Ｃ＞Ｂ/２とする。
また、Ａ、ＣとＤとの関係を、Ａ＞Ｄ＞Ｃと設定するのが良い。
Ａ、Ｂ、Ｃ、Ｄの間の関係を説明したが、Ａ≦Ｃとすると加締め後の内輪要素３と突出し部１１１の密着性が不足して、内輪要素３の軸方向固定力が低下する。
また、Ｃ≦Ｂ/２とすると、突出し部１１１の面取り起点Ｑ１において加締めによる応力集中がおきやすい。これらの理由によって、前記設定したようにＡ＞Ｃ＞Ｂ/２とするのが良い。 With respect to the relationship of these dimensions set as described above, A>C> B / 2 is set between A, B, and C.
Further, the relationship between A, C, and D is preferably set as A>D> C.
Although the relationship between A, B, C, and D has been described, if A ≦ C, the close contact between the inner ring element 3 and the protruding portion 111 after caulking is insufficient, and the axial fixing force of the inner ring element 3 is reduced. To do.
If C ≦ B / 2, stress concentration due to caulking is likely to occur at the chamfering start point Q 1 of the protruding portion 111. For these reasons, it is preferable to satisfy A>C> B / 2 as set above.

次に、突出し部１１１の加締めについて説明する。   Next, caulking of the protruding portion 111 will be described.

図４（ａ）は、加締め工具（図示略）にて、Ｙ方向へ荷重を加え小径外周部の先端部が拡開している途中の状態を示している。   FIG. 4A shows a state in which a tip is applied in the Y direction with a caulking tool (not shown) and the tip of the small-diameter outer peripheral portion is expanding.

図４（ｂ）は加締め作業が終了したところで、図１の破線部を拡大した状態を示している。   FIG. 4B shows a state where the broken line portion in FIG. 1 is enlarged when the caulking work is completed.

図４（ａ）、（ｂ）において、終端部１１の先端にある加締め部１ｋは、面取り部１Ｓの起点Ｑ１が内輪要素３の端面３ｕにおける円弧面取り部３ｖの円弧の終点Ｐ２付近で端面３ｕと当接し、面取り部１Ｓの終点Ｑ２は加締められた加締め部の最大径部に位置する状態になっている。加締め終了後は、面取り部１Ｓの起点Ｑ１と終点Ｑ２とは断面図的に略直線で結ばれている。その結果、外観を損なうような皺が寄らない。 FIG. 4 (a), the (b), the crimp portion 1k at the tip of the end portion 11 is chamfered portions 1 endpoint origin Q 1 is arc chamfer 3v in the end face 3u of the inner ring element 3 an arc of S P 2 end surface 3u abuts near, the end point Q 2 of the chamfered portion 1 S is in a state located at the maximum diameter portion of the crimp portion which is crimped. After crimping completion, they are connected by cross-section diagrammatically substantially linearly from the start point Q 1, the end point Q 2 of the chamfered portion 1 S. As a result, there will be no wrinkles that impair the appearance.

以上、実施形態１について説明したが、図５に示すような空洞部が円筒形ではなくて、円錐形の場合であっても、Ａ、Ｂ、Ｃの関係およびＡ、Ｃ、Ｄの関係を実施形態の説明中で設定した関係にすれば、円筒形の場合と同様な加締めが実施できる。   Although the first embodiment has been described above, the relationship between A, B, and C, and the relationship between A, C, and D even when the hollow portion as shown in FIG. 5 is not cylindrical but conical. If it is set as the relationship set in description of embodiment, the caulking similar to the case of a cylindrical shape can be implemented.

この場合、前記Ｂ寸法は、突き出し部１１１の外径寸法と突出し部１１１の端面１１２における空洞部１３の円錐面１３１の直径寸法との差の２分の１になる。   In this case, the B dimension is a half of the difference between the outer diameter dimension of the protruding portion 111 and the diameter dimension of the conical surface 131 of the cavity portion 13 at the end surface 112 of the protruding portion 111.

なお、図５においては、図３と同一の数字、符号を使用してある部分は説明済であるから、説明を省略してある。   In FIG. 5, the parts using the same numerals and symbols as those in FIG. 3 are already described, and thus the description thereof is omitted.

図６において、実施形態１の変形例を示す。同図は、車輪用ハブユニットの中心線より上側半分を示す断面図である。   FIG. 6 shows a modification of the first embodiment. This figure is a cross-sectional view showing the upper half of the center line of the wheel hub unit.

ハブ１はフランジ側の第１軸受軌道１ａも別体の内輪要素で形成している場合であるが、第１軸受軌道１ａを車両中心側の第２軸受軌道１ｂと共に２個の内輪要素３ａ、３ｂ、により形成し、内輪要素３ａ、３ｂ、を外周部１ｎに外嵌している。また、ハブ１の終端部１１には、空洞部１２が形成されており実施形態１と同様に、加締めに好適となるように肉厚が調整されている。終端部１１を図４（ａ）と同様な方法で加締めることによって、内輪３ａ、３ｂを、ハブ１の段部１ｃと終端部１１との間で加締めによって固定する。   The hub 1 is a case where the first bearing raceway 1a on the flange side is also formed of a separate inner ring element, but the first bearing raceway 1a and the second bearing raceway 1b on the vehicle center side are two inner ring elements 3a, 3b, and the inner ring elements 3a and 3b are externally fitted to the outer peripheral portion 1n. In addition, a cavity 12 is formed in the terminal end 11 of the hub 1, and the thickness is adjusted so as to be suitable for caulking, as in the first embodiment. By crimping the end portion 11 in the same manner as in FIG. 4A, the inner rings 3a and 3b are fixed between the step portion 1c of the hub 1 and the end portion 11 by caulking.

なお、図１、図２と共通する部品並びに部位については説明を省略する。   Note that description of parts and parts common to those in FIGS. 1 and 2 is omitted.

なお、実施形態１ならびに変形例は従動輪用の車輪用ハブユニットについて説明したが、本発明は、駆動輪用の車輪用ハブユニットについても実施するものである。   In addition, although Embodiment 1 and the modification demonstrated the wheel hub unit for driven wheels, this invention is implemented also about the wheel hub unit for drive wheels.

本発明の実施形態１を示す断面図である。It is sectional drawing which shows Embodiment 1 of this invention. 実施形態１のハブ加締め前を示す断面図である。It is sectional drawing which shows the hub crimping of Embodiment 1 before. 図２のＥ部拡大図である。It is the E section enlarged view of FIG. （ａ）、加締めの中間工程の説明図である。(A) It is explanatory drawing of the intermediate process of caulking.

（ｂ）、実施形態１のハブ加締め完了図を示す。（図１の破線部を示している）
ハブ終端部の空洞部の他の例である。 実施形態１の変形例を示す上側半分の断面図である。 (B) The hub caulking completion figure of Embodiment 1 is shown. (The broken line part of FIG. 1 is shown)
It is another example of the cavity part of a hub termination part. FIG. 6 is a cross-sectional view of the upper half showing a modification of the first embodiment.

符号の説明Explanation of symbols

Ｈｕ:車輪用ハブユニット
１：ハブ
１１:終端部
１１１：突出し部
１１２：突出し部の端面
１２:空洞部
１２１:円筒面
１ａ:第１の軸受軌道
１ｂ:第２の軸受軌道
１ｃ:段部
１ｋ：加締め部
１ｎ:小径外周部
１Ｓ:突出し部の面取り
Ｑ１:面取り起点
Ｑ２:面取り終点
２:外輪
２ａ、２ｂ：外輪の軸受軌道
３、３ａ、３ｂ:内輪要素
３ｕ:車両中心側の内輪端面
３ｖ:内輪面取り部
３ｙ:内周面
Ａｒｃ:内輪要素円弧面取り部
Ｐ１:内周面側面取り起点
Ｐ２：端面側面取り部終点
Ａ：内輪要素端面から突出し部端面までの長さ
Ｂ：突出し部の肉厚
Ｃ：突出し部の面取り軸方向長さ
Ｄ１：内輪要素面取り部起点から、面取り部の長さに等しい突出し部上の点
Ｄ：突出し部端面からＤ１点までの長さ Hu: Wheel hub unit 1: Hub 11: Terminal portion 111: Protruding portion 112: End surface 12 of the protruding portion 12: Cavity 121: Cylindrical surface 1a: First bearing race 1b: Second bearing race 1c: Step portion 1k : caulking portion 1n: the small-diameter outer peripheral portion 1 S: chamfer projecting portion Q 1: chamfering origin Q 2: chamfered end point 2: the outer ring 2a, 2b: bearing raceways 3,3a of the outer ring, 3b: inner ring element 3u: vehicle center side of the inner ring end surface 3 v: inner ring chamfer 3y: inner peripheral surface arc: inner ring element arcuate chamfer P 1: the inner peripheral surface side chamfer origin P 2: end face beveled portions endpoint a: length of the inner ring element end face to the projecting end face B: Thickness of the protruding portion C: Length of the protruding portion in the chamfered axial direction D 1 : From the starting point of the inner ring element chamfered portion to a point on the protruding portion equal to the length of the chamfered portion D: From the end surface of the protruding portion to D 1 point length

Claims (3)

内周に２列の軸受軌道を有する外輪と、
車両外端側には、車輪取付けフランジを有し、軸方向車両中心側には終端部を有し、前記外輪の軸方向車両外端側の軸受軌道に対応する第１の軸受け軌道を外周に一体または別体に有しているハブと、
前記ハブの前記終端部側に外嵌され、前記外輪の軸方向車両中心側の軸受軌道に対向する第２軸受軌道を外周に有しており、前記ハブの前記終端部の加締めにより前記終端部に固定された内輪要素と、
前記外輪の２つの軸受軌道と、前記第１軸受軌道及び第２軸受軌道との間に介在する転動体と、
を備えた車輪用ハブユニットにおいて、
前記ハブと内輪要素とを加締め固定する前の状態において、前記終端部は、内輪要素の車両中心側端面から突出し、かつ、半径方向内方を空洞部とした突出し部を有すると共に、前記内輪要素の車両中心側端面から前記突出し部端面までの長さ寸法をＡとし、
前記突出し部の先端部には外周面側に起点を有し端面を終点とする面取りを形成し、該面取りの終点は前記終端部の加締め後加締め部の最大径部に位置しており、該面取りの軸方向長さ寸法をＣとし、
前記突出し部の外径寸法と前記空洞部内周の前記突出し部端面における直径寸法との差の２分の１をＢとし、
これら寸法間の関係を、Ａ＞Ｃ＞Ｂ/２としたことを特徴とする車輪用ハブユニット。 An outer ring having two rows of bearing races on the inner circumference;
A wheel mounting flange is provided on the vehicle outer end side, a terminal portion is provided on the axial vehicle center side, and a first bearing track corresponding to the bearing track on the outer vehicle side of the outer ring in the axial direction is provided on the outer periphery. A hub that is integral or separate, and
A second bearing race which is fitted on the end portion side of the hub and faces a bearing race on the outer ring in the axial direction of the vehicle center is provided on the outer periphery, and the end portion is secured by caulking the end portion of the hub. An inner ring element fixed to the section;
A rolling element interposed between the two bearing raceways of the outer ring, the first bearing raceway and the second bearing raceway,
In the wheel hub unit with
In a state before caulking and fixing the hub and the inner ring element, the end portion protrudes from the end surface on the vehicle center side of the inner ring element and has a protruding portion with a radially inner side as a hollow portion. A length dimension from the vehicle center side end surface of the element to the protruding portion end surface is A,
A chamfer having a starting point on the outer peripheral surface side and an end surface as an end point is formed at the front end portion of the protruding portion, and the end point of the chamfer is located at the maximum diameter portion of the caulking portion after the end portion is caulked. , C is the axial length of the chamfer,
A half of the difference between the outer diameter dimension of the protruding portion and the diameter dimension of the inner peripheral surface of the protruding portion at the protruding portion end surface is defined as B.
A wheel hub unit characterized in that the relationship between these dimensions is A>C> B / 2. さらに、内輪要素の内周面と車両中心側端面との間に設けた面取り部の前記内周面側の面取り部起点から、前記面取り部の長さと略同一長さ寸法のＤ１点を前記突出し部外周面に設定し、前記突出し部端面から前記Ｄ１点までの長さ寸法をＤとし、前記ＡおよびＣ寸法との関係を、Ａ＞Ｄ＞Ｃとしたことを特徴とする請求項１に記載の車輪用ハブユニット。 Furthermore, from the chamfered portion starting point on the inner peripheral surface side of the chamfered portion provided between the inner peripheral surface of the inner ring element and the vehicle center side end surface, D 1 point having the same length as the chamfered portion is It is set to the outer peripheral surface of the protruding portion, the length dimension from the end surface of the protruding portion to the point D 1 is D, and the relationship between the A and C dimensions is A>D> C. The wheel hub unit according to 1. 前記面取り部の前記起点と前記終点とは加締め後略直線で結ばれる断面を有することを特徴とする請求項１または２に記載の車輪用ハブユニット。   3. The wheel hub unit according to claim 1, wherein the start point and the end point of the chamfered portion have a cross section connected by a substantially straight line after caulking. 4.
JP2004177133A 2004-06-15 2004-06-15 Hub unit for wheels Expired - Fee Related JP4513427B2 (en)

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US11072201B2 (en) * 2018-06-08 2021-07-27 Aktiebolaget Skf Flanged inner ring optimized for orbital forming operation and associated tool

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JP2008002619A (en) * 2006-06-23 2008-01-10 Nsk Ltd Seal member and hub unit bearing with seal member
JP5121603B2 (en) * 2008-07-02 2013-01-16 Ｎｔｎ株式会社 Wheel bearing device

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JP2003136160A (en) * 2001-10-31 2003-05-14 Koyo Seiko Co Ltd Method for manufacturing bearing unit for vehicle
JP2004132552A (en) * 1997-08-28 2004-04-30 Nsk Ltd Rolling bearing unit for supporting wheel
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JP2001130210A (en) * 1999-11-10 2001-05-15 Koyo Seiko Co Ltd Bearing device
JP2001239803A (en) * 1999-12-20 2001-09-04 Nsk Ltd Rolling bearing unit for supporting wheel
JP2003136160A (en) * 2001-10-31 2003-05-14 Koyo Seiko Co Ltd Method for manufacturing bearing unit for vehicle
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Publication number Priority date Publication date Assignee Title
US11072201B2 (en) * 2018-06-08 2021-07-27 Aktiebolaget Skf Flanged inner ring optimized for orbital forming operation and associated tool

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