JP3905288B2 - Wheel bearing device flange and wheel fastening structure - Google Patents

Wheel bearing device flange and wheel fastening structure Download PDF

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Publication number
JP3905288B2
JP3905288B2 JP2000215423A JP2000215423A JP3905288B2 JP 3905288 B2 JP3905288 B2 JP 3905288B2 JP 2000215423 A JP2000215423 A JP 2000215423A JP 2000215423 A JP2000215423 A JP 2000215423A JP 3905288 B2 JP3905288 B2 JP 3905288B2
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Prior art keywords
hole
bolt
wheel
flange
head
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Expired - Fee Related
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JP2002029204A (en
Inventor
稔博 羽方
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JTEKT Corp
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JTEKT Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は、自動車のホイール用軸受装置におけるフランジとホイール締結構造に関する。
【０００２】
【従来の技術】
従来、図３の自動車のホイール用軸受装置が知られている。このものは、図示しない車体に取付けられる外側部材３０と、ホイール３８が取付けられる内側部材３１と、内外部材３１，３０間に配置された転動体３２を備えている。上記内側部材３１の外周一端部には半径方向に延びる環状のフランジ３３が設けられ、該フランジ３３には軸方向に貫通するボルト穴３４が形成され、このボルト穴３４にボルト３５が挿通されている。頭部を有するボルト３５の首下部である大径部３５ａにはセレーション３６が形成されて、上記ボルト穴３４の内周面３４ａに食い込み、これによりボルト３５はボルト穴３４に圧入固定の状態とされている。また、フランジ３３から突出したボルト３５の上記大径部３５ａに連なる足部である小径部３５ｂに、ブレーキ部材３７とともにホイール３８が嵌合され、上記小径部３５ｂに形成されたねじ３９にナット４０をねじ嵌合させて上記フランジ３３に固定されている。
【０００３】
【発明が解決しようとする課題】
しかしながら、上記のような従来のホイール用軸受装置においては、ボルト３５がボルト穴３４に圧入固定されているため、ホイール３８が固定されるフランジ３３側面３３ａの平坦度すなわち面振れ精度に影響が出やすく、この面振れ精度が悪いとブレーキ部材３７およびホイール３８の性能に悪影響が及ぼされることがある。従って、このフランジ側面３３ａの面振れ精度には十分に注意が必要であり、その管理が面倒であった。
【０００４】
本発明は、ホイール用軸受装置のフランジにホイールをボルトにて固定する際、フランジ側面の面振れ精度の低下を防ぐことを目的とする。
【０００５】
【課題を解決するための手段】
上記課題を解決する手段として、請求項１に記載の発明は、内側部材と、外側部材と、内外部材間に配置された転動部材と、内外いずれか一方の回転側となる部材に一体に設けられたホイール取付用のフランジと、このフランジに形成されたボルト穴に挿通されフランジにホイールを締結するボルトとを有するホイール用軸受装置のフランジとホイール締結構造において、フランジのボルト穴が、ホイール取付面側が大径穴でホイール取付面と反対側が小径穴の段付き穴に形成されるとともに、ボルト頭部が、上記ボルト穴の小径穴に嵌合される小径部と上記ボルト穴の大径穴に嵌合される大径部との段付き頭部に形成され、上記段付き穴の大径穴と段付き頭部の大径部および上記段付き穴の小径穴と段付き頭部の小径部とはそれぞれすきまばめとされるとともに、上記ボルト頭部の小径部の端部が上記フランジのボルト穴から突出させられ、このボルト頭部の小径部の突出端部をホイール取付面と反対側の面にかしめることにより上記ボルトがボルト穴に固定されたことを特徴とする。
【０００６】
また、請求項２に記載の発明は、上記ボルト頭部の小径部の突出端部はその中央部にぬすみが形成されて断面凹形とされ、この断面凹形周縁がかしめられていること特徴とする。この構成により、上記突出端部のかしめが容易となる。
【０００７】
さらにまた、請求項３に記載の発明は、上記ボルト頭部の小径部の断面凹形の突出端部周面に複数の突起が形成され、突出端部周縁のかしめによりフランジ面に食い込むようにしたことを特徴とする。この構成によりボルトがボルト穴内で円周方向にシリップするのが防止される。
【０００８】
さらにまた、請求項４に記載の発明は、上記ボルト頭部の小径部とボルト穴の小径穴とが非真円形状の嵌合であることを特徴とする。この非真円形状とは、例えば六角形等の多角形や楕円形等であり、この構成によってもボルトはボルト穴内でスリップするのが防止される。
【０００９】
【発明の実施の形態】
本発明の実施形態を図１および図２に基づいて説明する。図示しない車体に取付けられる外側部材１と、ホイール８が取付けられる内側部材２と、内外部材２，１間に配置された転動体３を備えている。上記内側部材２の外周一端部には半径方向に延びる環状のフランジ４が設けられ、該フランジ４には軸方向に貫通するボルト穴５が形成され、このボルト穴５にボルト６が挿通されている。また、フランジ４から突出したボルト６のねじ部１０に、ブレーキ部材７とともにホイール８が嵌合され、上記ねじ部１０にナット９をねじ嵌合させて上記フランジ４に固定されている。
【００１０】
また、上記フランジ４のボルト穴５は、フランジ４のホイール取付面４ａ側が大径穴５ａでホイール取付面４ａと反対側面４ｂが小径穴５ｂの段付き穴に形成されるとともに、ボルト頭部１１が、上記ボルト穴５の小径穴５ｂに嵌合される小径部１１ｂと上記ボルト穴５の大径穴５ａに嵌合される大径部１１ａとの段付き頭部に形成されている。さらに、上記段付き穴の大径穴５ａと段付き頭部の大径部１１ａおよび上記段付き穴の小径穴５ｂと段付き頭部の小径部１１ｂとはそれぞれすきまばめとされるとともに、上記ボルト頭部１１の小径部１１ｂの突出端部１１ｃが上記フランジ４のボルト穴５から突出させられ、このボルト頭部１１の小径部１１ｂの突出端部１１ｃをホイール取付面４ａと反対側の面４ｂにかしめることにより上記ボルト６がボルト穴５に固定されている。
【００１１】
上記ボルト頭部１１の小径部１１ｂの突出端部１１ｃは図２においてよく判るように、その中央部にぬすみ１２が形成されて断面凹形とされ、この断面凹形周縁がかしめられている。すなわち、二点鎖線で示したもとの突出端部１１ｃは矢印方向へかしめられて固定される。この中央部のぬすみ１２によりかしめが容易となる。
【００１２】
また、上記ボルト頭部１１の小径部１１ｂの断面凹形の突出端部１１ｃ周面に複数の突起１３が形成され、突出端部１１ｃ周縁のかしめによりフランジ面４ｂに食い込むようにされている。この突起１３のフランジ面４ｂへの食い込みにより、ボルト６がボルト穴５内で円周方向にスリップするのが防止される。
【００１３】
さらには、上記ボルト頭部１１の小径部１１ｂとボルト穴５の小径穴５ｂとが六角形等多角形状や楕円形等の非真円形状の嵌合としてもよい。この構成にすることにより、上記突起１３の食い込み量を考慮することなく確実にボルトのスリップが防止される。
【００１４】
【発明の効果】
この発明のホイール用軸受装置のフランジとホイール締結構造においては、ボルトとボルト穴内面とが従来のようにセレーション嵌合ではなく、すきま嵌めにて組み合わされるため、ホイールが固定されるフランジ側面の平坦度すなわち面振れ精度の低下が防止される。
【図面の簡単な説明】
【図１】本発明の一実施形態のホイール用軸受装置の断面図である。
【図２】図１のフランジとホイール締結構造の拡大断面図である。
【図３】従来のホイール用軸受装置の断面図である。
【符号の説明】
１ 外側部材
２ 内側部材
３ 転動体
４ フランジ
５ ボルト穴
５ａ 大径穴
５ｂ 小径穴
６ ボルト
７ ブレーキ部材
８ ホイール
１１ ボルト頭部
１１ａ 大径部
１１ｂ 小径部
１１ｃ 突出端部
１２ ぬすみ
１３ 突起[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flange and a wheel fastening structure in a wheel bearing device of an automobile.
[0002]
[Prior art]
Conventionally, a wheel bearing device for an automobile shown in FIG. 3 is known. This includes an outer member 30 attached to a vehicle body (not shown), an inner member 31 to which a wheel 38 is attached, and rolling elements 32 arranged between the inner and outer members 31 and 30. An annular flange 33 extending in the radial direction is provided at one end of the outer periphery of the inner member 31, and a bolt hole 34 penetrating in the axial direction is formed in the flange 33, and a bolt 35 is inserted into the bolt hole 34. Yes. A serration 36 is formed in the large-diameter portion 35a, which is the lower part of the neck of the bolt 35 having a head, and the bit 35 is pressed into and fixed to the bolt hole 34 by biting into the inner peripheral surface 34a of the bolt hole 34. Has been. Further, a wheel 38 is fitted together with a brake member 37 to a small diameter portion 35b which is a foot portion of the bolt 35 protruding from the flange 33 and connected to the large diameter portion 35a, and a nut 40 is attached to a screw 39 formed on the small diameter portion 35b. Are fixed to the flange 33 by screw fitting.
[0003]
[Problems to be solved by the invention]
However, in the conventional wheel bearing device as described above, since the bolt 35 is press-fitted and fixed in the bolt hole 34, the flatness of the side surface 33a of the flange 33 to which the wheel 38 is fixed, that is, the surface runout accuracy is affected. If the surface runout accuracy is low, the performance of the brake member 37 and the wheel 38 may be adversely affected. Therefore, sufficient attention must be paid to the surface runout accuracy of the flange side surface 33a, and its management is troublesome.
[0004]
An object of the present invention is to prevent a decrease in surface runout accuracy of a flange side surface when a wheel is fixed to a flange of a wheel bearing device with a bolt.
[0005]
[Means for Solving the Problems]
As means for solving the above-mentioned problems, the invention according to claim 1 is integrated with the inner member, the outer member, the rolling member disposed between the inner and outer members, and the member on either the inner or outer rotating side. In a flange and a wheel fastening structure of a wheel bearing device having a provided wheel mounting flange and a bolt that is inserted into a bolt hole formed in the flange and fastens the wheel to the flange. The mounting surface side is a large diameter hole and the wheel mounting surface opposite side is formed as a stepped hole with a small diameter hole, and the bolt head is fitted to the small diameter hole of the bolt hole and the large diameter of the bolt hole Formed in a stepped head with a large diameter part fitted into the hole, and a large diameter hole in the stepped hole and a large diameter part in the stepped head, and a small diameter hole in the stepped hole and a stepped head. Clearance with small diameter part The end of the small diameter portion of the bolt head is projected from the bolt hole of the flange, and the protruding end of the small diameter portion of the bolt head is caulked to the surface opposite to the wheel mounting surface. Thus, the bolt is fixed in the bolt hole.
[0006]
Further, the invention according to claim 2 is characterized in that the projecting end portion of the small-diameter portion of the bolt head is formed with a dimple at the central portion thereof to have a concave cross section, and the concave periphery of the cross section is caulked. And This configuration facilitates caulking of the protruding end portion.
[0007]
Furthermore, in the invention described in claim 3, a plurality of protrusions are formed on the peripheral surface of the projecting end of the bolt head having a concave cross section, and the flange surface is bitten by the caulking of the peripheral edge of the projecting end. It is characterized by that. This configuration prevents the bolt from sipping in the circumferential direction within the bolt hole.
[0008]
Furthermore, the invention described in claim 4 is characterized in that the small diameter portion of the bolt head and the small diameter hole of the bolt hole are non-circular fitting. The non-circular shape is, for example, a polygon such as a hexagon, an ellipse, or the like, and this configuration also prevents the bolt from slipping in the bolt hole.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. 1 and 2. An outer member 1 attached to a vehicle body (not shown), an inner member 2 to which a wheel 8 is attached, and a rolling element 3 disposed between the inner and outer members 2 and 1 are provided. An annular flange 4 extending in the radial direction is provided at one end of the outer periphery of the inner member 2, and a bolt hole 5 penetrating in the axial direction is formed in the flange 4, and a bolt 6 is inserted into the bolt hole 5. Yes. Further, the wheel 8 is fitted together with the brake member 7 to the screw portion 10 of the bolt 6 protruding from the flange 4, and the nut 9 is screwed to the screw portion 10 to be fixed to the flange 4.
[0010]
Further, the bolt hole 5 of the flange 4 is formed as a stepped hole in which the wheel mounting surface 4a side of the flange 4 is a large diameter hole 5a and the side surface 4b opposite to the wheel mounting surface 4a is a small diameter hole 5b. Is formed in a stepped head having a small diameter portion 11 b fitted into the small diameter hole 5 b of the bolt hole 5 and a large diameter portion 11 a fitted into the large diameter hole 5 a of the bolt hole 5. Further, the large diameter hole 5a of the stepped hole and the large diameter portion 11a of the stepped head and the small diameter hole 5b of the stepped hole and the small diameter portion 11b of the stepped head are each fitted with a clearance fit, A protruding end portion 11c of the small diameter portion 11b of the bolt head portion 11 is protruded from the bolt hole 5 of the flange 4, and the protruding end portion 11c of the small diameter portion 11b of the bolt head portion 11 is opposite to the wheel mounting surface 4a. The bolt 6 is fixed to the bolt hole 5 by caulking on the surface 4b.
[0011]
The protruding end portion 11c of the small-diameter portion 11b of the bolt head portion 11 is formed with a dimple 12 at the center thereof to have a concave cross section, and the peripheral edge of the concave cross section is caulked. That is, the original projecting end portion 11c indicated by a two-dot chain line is caulked in the arrow direction and fixed. Caulking is facilitated by the thinning 12 at the center.
[0012]
A plurality of protrusions 13 are formed on the peripheral surface of the protruding end portion 11c having a concave cross section of the small-diameter portion 11b of the bolt head portion 11, and bite into the flange surface 4b by caulking the peripheral edge of the protruding end portion 11c. Due to the protrusion 13 biting into the flange surface 4 b, the bolt 6 is prevented from slipping in the circumferential direction within the bolt hole 5.
[0013]
Furthermore, the small diameter portion 11b of the bolt head 11 and the small diameter hole 5b of the bolt hole 5 may be fitted in a non-circular shape such as a polygonal shape such as a hexagon or an ellipse. By adopting this configuration, it is possible to reliably prevent the bolt from slipping without considering the amount of biting of the protrusion 13.
[0014]
【The invention's effect】
In the flange and the wheel fastening structure of the wheel bearing device of the present invention, the bolt and the inner surface of the bolt hole are combined not by serration fitting as in the prior art but by clearance fitting, so that the flange side surface to which the wheel is fixed is flat. Deterioration of the degree, that is, surface runout accuracy is prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a wheel bearing device according to an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of the flange and wheel fastening structure of FIG.
FIG. 3 is a cross-sectional view of a conventional wheel bearing device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outer member 2 Inner member 3 Rolling element 4 Flange 5 Bolt hole 5a Large diameter hole 5b Small diameter hole 6 Bolt 7 Brake member 8 Wheel 11 Bolt head 11a Large diameter part 11b Small diameter part 11c Protruding end part 12 Brazing 13 Protrusion

Claims (4)

内側部材と、外側部材と、内外部材間に配置された転動部材と、内外いずれか一方の回転側となる部材に一体に設けられたホイール取付用のフランジと、このフランジに形成されたボルト穴に挿通されフランジにホイールを締結するボルトとを有するホイール用軸受装置のフランジとホイール締結構造において、フランジのボルト穴が、ホイール取付面側が大径穴でホイール取付面と反対側が小径穴の段付き穴に形成されるとともに、ボルト頭部が、上記ボルト穴の小径穴に嵌合される小径部と上記ボルト穴の大径穴に嵌合される大径部との段付き頭部に形成され、上記段付き穴の大径穴と段付き頭部の大径部および上記段付き穴の小径穴と段付き頭部の小径部とはそれぞれすきまばめとされるとともに、上記ボルト頭部の小径部の端部が上記フランジのボルト穴から突出させられ、このボルト頭部の小径部の突出端部をホイール取付面と反対側の面にかしめることにより上記ボルトがボルト穴に固定されたことを特徴とするホイール用軸受装置のフランジとホイール締結構造。An inner member, an outer member, a rolling member disposed between the inner and outer members, a wheel mounting flange integrally provided on either the inner or outer rotating member, and a bolt formed on the flange In a flange and wheel fastening structure of a wheel bearing device having a bolt inserted through the hole and fastening the wheel to the flange, the bolt hole of the flange is a step having a large diameter hole on the wheel mounting surface side and a small diameter hole on the opposite side to the wheel mounting surface. A bolt head is formed on the stepped head of a small diameter portion fitted to the small diameter hole of the bolt hole and a large diameter portion fitted to the large diameter hole of the bolt hole. The stepped hole large diameter hole and the stepped head large diameter portion and the stepped hole small diameter hole and the stepped head small diameter portion are each fitted with a clearance fit, and the bolt head The end of the small diameter part of the For a wheel characterized in that the bolt is fixed to the bolt hole by protruding from the bolt hole of the flange and caulking the protruding end of the small diameter portion of the bolt head to the surface opposite to the wheel mounting surface. Bearing device flange and wheel fastening structure. 上記ボルト頭部の小径部の突出端部はその中央部にぬすみが形成されて断面凹形とされ、この断面凹形周縁がかしめられていること特徴とする請求項１に記載のホイール用軸受装置のフランジとホイール締結構造。2. The wheel bearing according to claim 1, wherein the projecting end portion of the small-diameter portion of the bolt head portion is formed with a dullness at the center thereof to have a concave cross section, and the peripheral edge of the concave cross section is caulked. Equipment flange and wheel fastening structure. 上記ボルト頭部の小径部の断面凹形の突出端部周面に複数の突起が形成され、突出端部周縁のかしめによりフランジ面に食い込むようにしたことを特徴とする請求項２に記載のホイール用軸受装置のフランジとホイール締結構造。3. The protrusion according to claim 2, wherein a plurality of protrusions are formed on a peripheral surface of the protruding end portion having a concave cross section of the small-diameter portion of the bolt head, and the flange end is bitten by caulking the peripheral edge of the protruding end. Flange and wheel fastening structure of wheel bearing device. 上記ボルト頭部の小径部とボルト穴の小径穴とが非真円形状の嵌合であることを特徴とする請求項１または２に記載のホイール用軸受装置のフランジとホイール締結構造。The flange and wheel fastening structure of a wheel bearing device according to claim 1 or 2, wherein the small-diameter portion of the bolt head and the small-diameter hole of the bolt hole are non-circular fittings.
JP2000215423A 2000-07-17 2000-07-17 Wheel bearing device flange and wheel fastening structure Expired - Fee Related JP3905288B2 (en)

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JP2000215423A JP3905288B2 (en) 2000-07-17 2000-07-17 Wheel bearing device flange and wheel fastening structure

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JP3905288B2 true JP3905288B2 (en) 2007-04-18

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