JP2004183769A - Bearing device for wheel - Google Patents

Bearing device for wheel Download PDF

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Publication number
JP2004183769A
JP2004183769A JP2002350915A JP2002350915A JP2004183769A JP 2004183769 A JP2004183769 A JP 2004183769A JP 2002350915 A JP2002350915 A JP 2002350915A JP 2002350915 A JP2002350915 A JP 2002350915A JP 2004183769 A JP2004183769 A JP 2004183769A
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JP
Japan
Prior art keywords
bearing
wheel
outside
facing
seal
Prior art date
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Pending
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JP2002350915A
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Japanese (ja)
Inventor
Hisashi Otsuki
寿志 大槻
Kazuhisa Shigeoka
和寿 重岡
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2002350915A priority Critical patent/JP2004183769A/en
Publication of JP2004183769A publication Critical patent/JP2004183769A/en
Pending legal-status Critical Current

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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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7873—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section
    • F16C33/7876—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section with sealing lips
    • 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
    • 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)
  • Sealing Of Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for a wheel provided with a magnetic encoder capable of easily discriminating if an end part is outer or inner side when it is fitted to a knuckle to prevent fitting error. <P>SOLUTION: A plurality of rolling elements 3 are provided between rolling surfaces 2a and 1a of an outer member 2 and an inner member 1. Both end parts of a circular space between the outer member 2 and the inner member 1 are respectively sealed with a pair of seal devices 5 and 13. On one seal device 5, the magnetic encoder 10 comprising magnetic poles arranged in a circumferential direction is provided. A bearing outside surface of the seal device 5 composed of the magnetic encoder 10 is colored black, and a side surface of the other seal device 13 is colored in other color than black. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は、磁気エンコーダを具備する車輪用軸受装置に関する。
【０００２】
【従来の技術】
アンチロックブレーキ装置（ＡＢＳ）を備えた自動車では、上記ＡＢＳを制御するために、車輪の回転速度を検出する回転検出装置が、車輪軸受装置に組み込まれる。従来、このような車輪用軸受装置として、転動体を介して転接する内方部材および外方部材の間の環状空間の両端部を一対のシール装置で密封し、一方のシール装置に、円周方向に磁極が並ぶ磁気エンコーダを一体化させたものが提案されている（例えば特許文献１）。上記磁気エンコーダと、この磁気エンコーダに対面配置され車輪の回転に伴う磁気エンコーダの磁極変化を検出するセンサとで回転検出装置が構成される。
【０００３】
【特許文献１】
特開２００１−２１５１３２号公報
【０００４】
【発明が解決しようとする課題】
このような構成の車輪用軸受装置において、外方部材がフランジ無し形状や左右略対称形状のものであって、内方部材も車輪取付フランジを有しないもの、例えばハブ輪に嵌合させるものである場合等では、両端のいずれがアウター側かインナー側かを簡単に判別できない場合がある。このため、自動車メーカの組立ラインなどで、ナックルやハブ輪に組み付けるときに、組み込み方向を間違える可能性がある。例えば、正しくは磁気エンコーダ付きのシール装置で密封されている端部側をインナー側とすべきところを、逆にアウター側としてナックルやハブ輪に組み込んでしまう可能性がある。
【０００５】
この発明の目的は、ナックルやハブ輪への組付け時に、端部がアウター側かインナー側かを簡単に識別できて誤組み込みを防止することのできる車輪用軸受装置を提供することである。
【０００６】
【課題を解決するための手段】
この発明の車輪用軸受装置は、内周に転走面を有する外方部材と、上記転走面に対向する転走面を外周に有する内方部材と、これら転走面間に介在した複数の転動体と、上記外内の部材間の環状空間の両端部をそれぞれ密封する一対のシール装置とを備える。一方のシール装置は、円周方向に磁極が並ぶ磁気エンコーダが設けられる。この構成の車輪用軸受装置において、一方のシール装置と他方のシール装置の軸受外側を向く側面の色を互いに異ならせたことを特徴とする。
この構成によれば、磁気エンコーダが設けられたシール装置の軸受外側を向く側面の色と、他方のシール装置の軸受外側を向く側面の色の違いから、車輪用軸受装置の端部がアウター側かインナー側かを簡単に識別できる。このため、ナックルあるいはハブ輪への組付け時に、誤組み込みが防止される。
【０００７】
この発明において、上記外方部材および内方部材は、例えば、外見がアウター側とインナー側とにつき、互いに略対称形状のものとされる。すなわち、軸方向の一端側と他端側とで互いに略対称形状ものとされる。車輪用軸受装置には、外方部材にナックルへの取付用のフランジを設けたり、内方部材を車輪取付用のフランジ付きとしてハブ輪と兼用させたものがあり、これらのフランジ等で外見がアウター側とインナー側とで明らかに非対称のものは、シール装置の色で識別する必要がない。この発明は軸受全体として外見が略対称形状のものである場合に、色の違いが識別に利用される。
【０００８】
この発明は、一方のシール装置を磁気エンコーダ付きとするものにおいて、磁気エンコーダがシール装置に内蔵されるものなど、種々の構成の磁気エンコーダ付きシール装置に適用できる。一般的には磁気エンコーダの被検出面となる表面が軸受外に露出し、シール装置の軸受外側を向く面が上記磁気エンコーダの表面となる。このような軸受外側を向く側面が磁気エンコーダの表面である場合に、磁気エンコーダの表面を黒色とし、他方のシール装置の軸受外側を向く側面を、黒色以外の色相としても良い。この明細書で言う「黒色」は、濃い灰色を含む意味である。
ゴム磁石等の着磁材料は一般に黒色であるため、磁気エンコーダの側面が黒色であれば、着色処理を省略できる。他方のシール装置の軸受外側を向く側面は、白色であっても良いが、色相を黒色と異ならせると、色付きと色無しとで区別でき、アウター側とインナー側との識別がより明確に行える。
【０００９】
この発明において、他方のシール装置が、リップ部を有するゴム材を、芯金に対してその芯金の軸受外側を向く側面を覆うように固着したものである場合に、上記ゴム材を上記一方のシール装置の軸受外側を向く面の色相と異なるものとしても良い。例えば、磁気エンコーダの表面が黒色である場合に、他方のシール装置のゴム材を黒色以外の色相とする。
このようにゴム材自体の色相を変えることで、着色の工程を省くことができる。ゴム材の材料に着色材を混入させても良い。
【００１０】
また、他方のシール装置が、リップ部を有するゴム材を、芯金に対してその芯金の軸受外側を向く側面を覆うように固着したものである場合に、上記ゴム材の軸受外側を向く側面に、上記一方のシール装置の軸受外側を向く面の色相と異なる色相の塗装を施しても良い。
この場合、塗装の工程が必要となるが、着色の自由度が高く得られる。例えば塗装面にアウター側とインナー側の区別のマークや文字を付加しても良い。
【００１１】
【発明の実施の形態】
この発明の第１の実施形態を図１ないし図５と共に説明する。図１はこの実施形態に係る車輪用軸受装置Ｃのハブ輪取付状態の断面図、図２はその軸受単独状態をそれぞれ示す。この車輪用軸受装置Ｃは駆動輪の支持に適用した例であって、回転側となる内方部材１および静止側となる外方部材２と、これら内外の部材１，２間に収容される複数の転動体３と、内外の部材１，２間の環状空間の端部を密封するシール装置５，１３とを備える。一端のシール装置５は、磁気エンコーダ１０（図３）付きのものである。内方部材１および外方部材２は、転動体３の転走面１ａ，２ａを複列に有しており、各転走面１ａ，２ａは溝状に形成されている。内方部材１および外方部材２は、各々転動体３を介して互いに回転自在となった内周側の部材および外周側の部材のことであり、軸受内輪および軸受外輪の単独であっても、これら軸受内輪や軸受外輪と別の部品とが組合わさった組立部材であっても良い。また、内方部材１は、軸であっても良い。ただし、この実施形態では、内方部材１および外方部材２は、外見がアウター側とインナー側とにつき、互いに略対称形状のものとされる。転動体３は、ボールまたはころからなり、この例ではボールが用いられている。転動体３は各列毎に保持器４で保持される。
【００１２】
この車輪用軸受装置Ｃは、複列の転がり軸受、詳しくは複列のアンギュラ玉軸受とされていて、その内方部材１は、各転動体列の転走面１ａ，１ａがそれぞれ形成された一対の分割型の内輪１Ａ，１Ｂからなる。これら内輪１Ａ，１Ｂは、ハブ輪６の軸部の外周に嵌合する。ハブ輪６には、等速自在継手７の一端（例えば外輪）が連結され、ハブ輪６のフランジ部６ａに車輪（図示せず）がボルト８で取付けられる。等速自在継手７は、その他端（例えば内輪）が駆動軸に連結される。
外方部材２は軸受外輪からなり、懸架装置におけるナックル１８（図１）に取付けられる。外方部材２は外周にフランジを有しないものであり、また内方部材１も外周にフランジを有しないものである。
【００１３】
図３はこの車輪用軸受装置Ｃにおける一端のシール装置５の設置部Ａ（図２）を拡大して示す。シール装置５は、磁気エンコーダ１０と、固定側のシール部材９とで構成される。磁気エンコーダ１０はスリンガとなり、回転側である内方部材１に取付けられる。
【００１４】
シール装置５の詳細を説明すると、内方部材１と外方部材２に各々取付けられた第１および第２の金属板製の環状シール板１１，１２を有する。これらシール板１１，１２は、各々内方部材１および外方部材２に圧入状態に嵌合させることで取付けられている。両環状シール板１１，１２は、各々円筒部１１ａ，１２ａと側板部１１ｂ，１２ｂとでなる断面Ｌ字状に形成されて互いに対向する。
第１の環状シール板１１は、回転側の部材である内方部材１に嵌合され、スリンガとなる。第１の環状シール板１１は、磁気エンコーダ１０における芯金となる。
【００１５】
磁気エンコーダ１０は、芯金である上記第１の環状シール板１１の側板部１１ｂの軸受外側（軸受幅面側）に向く表面に多極磁石１４を設けて構成される。多極磁石１４は、図４のように円周方向に交互に並ぶ磁極Ｎ，Ｓを有するディスク状の部材であり、その外周縁は第１の環状シール板１１の側板部１１ｂの先端を覆っている。この多極磁石１４はいわゆるゴム磁石とされており、その磁極Ｎ，Ｓは、図４のようにピッチ円直径（ＰＣＤ）において、所定のピッチｐとなるように形成されている。多極磁石１４は、ゴム磁石の他に、プラスチック磁石や、焼結合金製磁石であっても良い。磁気エンコーダ１０の軸受外側を向く側面、つまり多極磁石１４の軸受外側に露出する面は黒色とされる。多極磁石１４がゴム磁石である場合、着色を行わなくても、一般に黒色となる。
この多極磁石１４に対面して、図１のように磁気センサ１５を配置することにより、車輪回転速度の検出用の回転検出装置が構成される。磁気センサ１５は、ホール素子等であっも良く、またコイルおよびヨーク等で構成されて発電するものであっても良い。磁気センサ１５は、車体に取付けられる。
【００１６】
第２の環状シール板１２は、上記シール部材９を構成する部材であり、第１の環状シール板１１の側板部１１ｂに摺接するサイドリップ１６ａと円筒部１１ａに摺接するラジアルリップ１６ｂ，１６ｃとを一体に有する。これらリップ１６ａ〜１６ｃは、第２の環状シール板１２に加硫接着された弾性体１６の一部として設けられている。
第２の環状シール板１２の円筒部１２ａと第１の環状シール板１１の側板部１１ｂの先端とは僅かな径方向隙間をもって対峙させ、その隙間でラビリンスシール１７を構成している。
【００１７】
図５は車輪用軸受装置Ｃにおける他端のシール装置１３の設置部Ｂ（図２）を拡大して示す。このシール装置１３は、リップ部１９ａ，１９ｂを有するゴム材１９と、このゴム材１９を固着した芯金である第３の金属板製の環状シール板２０とからなる。環状シール板２０は、円筒部２０ａと径方向に向く側板部２０ｂとでなる断面Ｌ字状とされ、その円筒部２０ａを外方部材２の内周に圧入状態で嵌合させることで外方部材２に取付けられている。上記ゴム材１９は、第３の環状シール板２０の側板部２０ｂの軸受外側を向く側面を覆うように固着され、そのリップ部１９ａ，１９ｂは内方部材１の外周に摺接する。このゴム材１９は黒以外の色相のものとされている。例えば、赤色、緑色、黄色等とされている。
【００１８】
この構成の車輪用軸受装置Ｃは、図２のように、車体側の懸架装置におけるナックル１８（図１）およびハブ輪６に組み付ける前の状態で、自動車メーカーの組立ラインに搬入される。ナックル１８への組付けにおいては、磁気エンコーダ１０付きのシール装置５を設置した端部側がインナー側、他方のシール装置１３を設置した端部側がアウター側となるように端部の向きが決められる。このとき磁気エンコーダ１０付きのシール装置５は、磁気エンコーダ１０の軸受外側に向く露出面が黒色を呈しており、また他方のシール装置１３は軸受外側を向く側面が黒色以外の色相のゴム材１９で覆われているので、色相の違いから、インナー側とアウター側とが一目で識別できる。このため、ナックル１８へ車輪用軸受装置Ｃを正しい方向組み付けることができ、誤組み込みが防止される。
なお、車輪用軸受装置Ｃをナックル１８に組付ける前にハブ輪６を組み付ける場合は、ハブ輪６に対して車輪用軸受装置Ｃの向きを正しく組付ける必要があるが、この場合も上記と同様に、一目で方向が識別できて、誤組み込みが防止される。
【００１９】
両側のシール装置５，１３の色相を異ならせるについて、磁気エンコーダ１０側のシール装置５を上記のように黒色とした場合、ゴム磁石等の着磁材料が一般に黒色であるため、磁気エンコーダ１０側のシール装置５に特に着色処理をする必要がなく、着色処理が省略できる。
また、他方のシール装置１３は、ゴム材１９自体の色相を黒色以外の色相としているので、ゴム材１９に着色剤を添加することなどで成形時に色の選択が行え、後に着色工程を設けることが不要である。
【００２０】
図６は、この発明の他の実施形態を示す。この実施形態の車輪用軸受装置Ｃは図１〜図５に示す第１の実施形態において、シール装置１３におけるゴム材１９の軸受外側を向く側面を黒色以外の色相とするのに替えて、その側面に黒色以外の塗膜層２１を設けたものである。すなわちペイントによる塗装を施したものである。磁気エンコーダ１０付きのシール装置５における多極磁石１４の軸受外側に向く側面が黒色であること、およびその他の各構成は第１の実施形態と同じであり、ここではそれらの構成については説明を省略する。
【００２１】
この実施形態の場合も、磁気エンコーダ１０付きのシール装置５の側面が黒色であり、他方のシール装置１３の側面が黒色以外の色相であるため、これらの色相の違いから、車輪用軸受装置Ｃのインナー側とアウターとを容易に識別することができる。
他方のシール装置１３は、塗装の工程が必要となるが、ゴム材１９に塗装を施すだけで良いので、着色の自由度が高く得られる。例えば塗装面にアウター側とインナー側の区別のマークや文字を付加しても良く、さらに別の表示を施しても良い。
【００２２】
なお、上記各実施形態では、内方部材１が回転側で、外方部材２が静止側の車輪用軸受装置Ｃの場合を例示して説明したが、これに限らず、例えば内方部材が静止側、外方部材が回転側となる車輪用軸受装置にもこの発明を適用することができる。この場合、磁気エンコーダ付きシール装置における磁気エンコーダは回転側である外方部材に取付けられ、シール部材は静止側である内方部材に取付けられる。
【００２３】
【発明の効果】
この発明の車輪用軸受装置は、内周に転走面を有する外方部材と、上記転走面に対向する転走面を外周に有する内方部材と、これら転走面間に介在した複数の転動体と、上記外内の部材間の環状空間の両端部をそれぞれ密封する一対のシール装置とを備え、一方のシール装置に、円周方向に磁極が並ぶ磁気エンコーダが設けられた車輪用軸受装置であって、一方のシール装置と他方のシール装置の軸受外側を向く側面の色を互いに異ならせたために、色の違いから、車輪用軸受装置の端部がアウター側かインナー側かを簡単に識別できる。そのため、ナックルやハブ輪への組付け時に、誤組付けが生じることが防止できる。
【図面の簡単な説明】
【図１】この発明の第１の実施形態にかかる車輪用軸受装置のハブ輪組付け状態を示す断面図である。
【図２】同車輪用軸受装置の単独の断面図である。
【図３】図２におけるＡ部の拡大断面図である。
【図４】同軸受装置における磁気エンコーダを正面から示す磁極の説明図である。
【図５】図２におけるＢ部の拡大断面図である。
【図６】この発明の他の実施形態にかかる車輪用軸受装置のシール装置設置部を示す拡大断面図である。
【符号の説明】
Ｃ…車輪用軸受装置
１…内方部材
２…外方部材
１ａ，２ａ…転走面
３…転動体
５…シール装置
６…ハブ輪
１０…磁気エンコーダ
１３…シール装置
１４…多極磁石
１８…ナックル
１９…ゴム材
１９ａ，１９ｂ…リップ部
２０…第３の環状シール板（芯金）
２１…塗膜層[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bearing device for a wheel including a magnetic encoder.
[0002]
[Prior art]
In an automobile equipped with an anti-lock brake device (ABS), a rotation detection device for detecting a rotation speed of a wheel is incorporated in a wheel bearing device in order to control the ABS. Conventionally, as such a wheel bearing device, both ends of an annular space between an inner member and an outer member that are in contact with each other via rolling elements are sealed with a pair of seal devices, and one of the seal devices is provided with a circumferential member. A magnetic encoder in which magnetic poles are aligned in one direction has been proposed (for example, Patent Document 1). A rotation detecting device is constituted by the magnetic encoder and a sensor that faces the magnetic encoder and detects a change in magnetic pole of the magnetic encoder accompanying rotation of a wheel.
[0003]
[Patent Document 1]
JP 2001-215132 A
[Problems to be solved by the invention]
In the wheel bearing device having such a configuration, the outer member has a flangeless shape or a substantially symmetrical shape, and the inner member has no wheel mounting flange, for example, is fitted to a hub wheel. In some cases, it may not be easy to determine which of the two ends is the outer side or the inner side. For this reason, when assembling to a knuckle or a hub wheel in an assembly line of an automobile manufacturer, there is a possibility that the assembling direction is wrong. For example, there is a possibility that a part that should be properly sealed with a seal device with a magnetic encoder should be set as an inner side, and conversely, may be incorporated into a knuckle or hub wheel as an outer side.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide a wheel bearing device that can easily identify whether an end is an outer side or an inner side when assembled to a knuckle or a hub wheel, thereby preventing erroneous assembly.
[0006]
[Means for Solving the Problems]
The wheel bearing device according to the present invention includes an outer member having a rolling surface on an inner periphery, an inner member having a rolling surface facing the rolling surface on an outer periphery, and a plurality of members interposed between the rolling surfaces. And a pair of sealing devices for sealing both ends of the annular space between the outer and inner members. One sealing device is provided with a magnetic encoder in which magnetic poles are arranged in a circumferential direction. In the wheel bearing device having this configuration, the colors of the side surfaces of the one seal device and the other seal device facing the outside of the bearing are different from each other.
According to this configuration, the end of the wheel bearing device is located on the outer side due to the difference between the color of the side of the seal device provided with the magnetic encoder facing the outside of the bearing and the color of the side of the other seal device facing the outside of the bearing. It can be easily distinguished between the inner side and the inner side. For this reason, when assembling to the knuckle or the hub wheel, erroneous assembling is prevented.
[0007]
In the present invention, for example, the outer member and the inner member are substantially symmetrical in appearance with respect to the outer side and the inner side. That is, the first and second ends are substantially symmetrical with each other in the axial direction. Some wheel bearing devices are provided with a flange for mounting to the knuckle on the outer member, or the inner member is provided with a flange for mounting the wheel, which also serves as a hub wheel. Clearly asymmetric ones on the outer side and the inner side need not be identified by the color of the sealing device. In the present invention, when the appearance of the bearing as a whole is substantially symmetric, the difference in color is used for identification.
[0008]
INDUSTRIAL APPLICABILITY The present invention can be applied to various types of seal devices with a magnetic encoder, such as a seal device with a magnetic encoder and a magnetic encoder built in the seal device. Generally, the surface of the magnetic encoder that is to be detected is exposed outside the bearing, and the surface of the seal device that faces the outside of the bearing is the surface of the magnetic encoder. When the side surface facing the outside of the bearing is the surface of the magnetic encoder, the surface of the magnetic encoder may be black, and the side surface facing the outside of the bearing of the other seal device may have a hue other than black. The term "black" used in this specification includes dark gray.
Since a magnetized material such as a rubber magnet is generally black, the coloring process can be omitted if the side surface of the magnetic encoder is black. The side of the other seal device facing the outside of the bearing may be white, but if the hue is different from black, it can be distinguished between colored and non-colored, and the outer side and the inner side can be more clearly distinguished. .
[0009]
In the present invention, when the other sealing device is a device in which a rubber material having a lip portion is fixed to a metal core so as to cover a side surface of the metal core facing the outside of the bearing, the rubber material is bonded to the metal material. May be different from the hue of the surface of the sealing device facing the outside of the bearing. For example, when the surface of the magnetic encoder is black, the rubber material of the other sealing device has a hue other than black.
By changing the hue of the rubber material itself, the coloring step can be omitted. A coloring material may be mixed into the rubber material.
[0010]
In the case where the other sealing device is a rubber material having a lip portion fixed to a metal core so as to cover a side surface of the metal core facing the bearing outside, the rubber material faces the bearing outside of the rubber material. The side surface may be coated with a hue different from the hue of the surface of the one sealing device facing the outside of the bearing.
In this case, a painting step is required, but a high degree of freedom in coloring can be obtained. For example, a mark or a character for distinguishing between the outer side and the inner side may be added to the painted surface.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view of a wheel bearing device C according to this embodiment in a hub wheel mounted state, and FIG. 2 shows a state of the bearing alone. The wheel bearing device C is an example applied to the support of a drive wheel, and is accommodated between an inner member 1 on the rotating side and an outer member 2 on the stationary side, and between the inner and outer members 1 and 2. A plurality of rolling elements 3 and sealing devices 5 and 13 for sealing ends of an annular space between the inner and outer members 1 and 2 are provided. The sealing device 5 at one end has a magnetic encoder 10 (FIG. 3). The inner member 1 and the outer member 2 have the rolling surfaces 1a and 2a of the rolling element 3 in multiple rows, and each of the rolling surfaces 1a and 2a is formed in a groove shape. The inner member 1 and the outer member 2 are inner and outer members rotatable with respect to each other via the rolling elements 3, respectively. Alternatively, it may be an assembly member in which the bearing inner ring or the bearing outer ring is combined with another component. Further, the inner member 1 may be a shaft. However, in this embodiment, the inner member 1 and the outer member 2 are substantially symmetrical in appearance on the outer side and the inner side. The rolling element 3 is formed of a ball or a roller. In this example, a ball is used. The rolling elements 3 are held by the holders 4 for each row.
[0012]
The wheel bearing device C is a double-row rolling bearing, more specifically, a double-row angular ball bearing. The inner member 1 is formed with rolling surfaces 1a, 1a of each rolling element row. It consists of a pair of split type inner rings 1A and 1B. These inner rings 1 </ b> A and 1 </ b> B are fitted on the outer periphery of the shaft of the hub wheel 6. One end (for example, an outer ring) of a constant velocity universal joint 7 is connected to the hub wheel 6, and a wheel (not shown) is attached to a flange portion 6 a of the hub wheel 6 with a bolt 8. The other end (for example, the inner ring) of the constant velocity universal joint 7 is connected to the drive shaft.
The outer member 2 comprises a bearing outer ring, and is attached to a knuckle 18 (FIG. 1) in the suspension. The outer member 2 has no flange on the outer periphery, and the inner member 1 also has no flange on the outer periphery.
[0013]
FIG. 3 is an enlarged view of the installation portion A (FIG. 2) of the sealing device 5 at one end in the wheel bearing device C. The sealing device 5 includes a magnetic encoder 10 and a fixed sealing member 9. The magnetic encoder 10 becomes a slinger and is attached to the inner member 1 on the rotating side.
[0014]
The sealing device 5 will be described in detail. The sealing device 5 includes first and second annular metal sealing plates 11 and 12 attached to the inner member 1 and the outer member 2, respectively. These seal plates 11 and 12 are attached to the inner member 1 and the outer member 2 by being fitted in a press-fit state, respectively. The two annular seal plates 11 and 12 are formed in an L-shaped cross section including the cylindrical portions 11a and 12a and the side plates 11b and 12b, and face each other.
The first annular seal plate 11 is fitted to the inner member 1 which is a member on the rotation side, and serves as a slinger. The first annular seal plate 11 serves as a core in the magnetic encoder 10.
[0015]
The magnetic encoder 10 is configured by providing a multipolar magnet 14 on the surface of the side plate portion 11b of the first annular seal plate 11, which is a core metal, facing the outside of the bearing (bearing width surface side). The multipolar magnet 14 is a disk-shaped member having magnetic poles N and S alternately arranged in the circumferential direction as shown in FIG. 4, and its outer peripheral edge covers the tip of the side plate 11 b of the first annular seal plate 11. ing. The multipole magnet 14 is a so-called rubber magnet, and its magnetic poles N and S are formed so as to have a predetermined pitch p in a pitch circle diameter (PCD) as shown in FIG. The multi-pole magnet 14 may be a plastic magnet or a sintered alloy magnet other than the rubber magnet. The side of the magnetic encoder 10 facing the outside of the bearing, that is, the surface of the multipolar magnet 14 exposed outside the bearing is black. When the multipolar magnet 14 is a rubber magnet, it generally becomes black even without coloring.
By arranging the magnetic sensor 15 facing the multipole magnet 14 as shown in FIG. 1, a rotation detecting device for detecting the wheel rotation speed is configured. The magnetic sensor 15 may be a Hall element or the like, or may be composed of a coil and a yoke and generate power. The magnetic sensor 15 is mounted on a vehicle body.
[0016]
The second annular seal plate 12 is a member constituting the seal member 9, and includes a side lip 16 a slidably in contact with the side plate portion 11 b of the first annular seal plate 11 and radial lips 16 b and 16 c in slidable contact with the cylindrical portion 11 a. Are integrated. These lips 16a to 16c are provided as a part of the elastic body 16 which is vulcanized and bonded to the second annular seal plate 12.
The cylindrical portion 12a of the second annular seal plate 12 and the tip of the side plate portion 11b of the first annular seal plate 11 are opposed to each other with a small radial gap, and a labyrinth seal 17 is formed by the gap.
[0017]
FIG. 5 shows an enlarged view of the installation portion B (FIG. 2) of the sealing device 13 at the other end of the wheel bearing device C. The sealing device 13 includes a rubber member 19 having lip portions 19a and 19b, and an annular seal plate 20 made of a third metal plate, which is a metal core to which the rubber member 19 is fixed. The annular seal plate 20 has an L-shaped cross section including a cylindrical portion 20a and a side plate portion 20b facing in the radial direction. It is attached to the member 2. The rubber member 19 is fixed so as to cover the side surface of the side plate portion 20b of the third annular seal plate 20 facing the outside of the bearing, and the lip portions 19a and 19b are in sliding contact with the outer periphery of the inner member 1. The rubber material 19 has a hue other than black. For example, the colors are red, green, and yellow.
[0018]
As shown in FIG. 2, the wheel bearing device C of this configuration is carried into an assembly line of an automobile manufacturer before being assembled to the knuckle 18 (FIG. 1) and the hub wheel 6 in the suspension device on the vehicle body side. In assembling to the knuckle 18, the orientation of the end is determined such that the end on which the sealing device 5 with the magnetic encoder 10 is installed is the inner side, and the end on which the other sealing device 13 is installed is the outer side. . At this time, the sealing device 5 with the magnetic encoder 10 has a black exposed surface facing the outside of the bearing of the magnetic encoder 10, and the other sealing device 13 has a rubber material 19 whose side facing the outside of the bearing has a hue other than black. , The inner side and the outer side can be identified at a glance from the difference in hue. For this reason, the wheel bearing device C can be assembled to the knuckle 18 in the correct direction, and erroneous assembly is prevented.
In addition, when assembling the hub wheel 6 before assembling the wheel bearing device C to the knuckle 18, it is necessary to correctly assemble the direction of the wheel bearing device C with respect to the hub wheel 6. Similarly, the direction can be identified at a glance, thereby preventing erroneous assembly.
[0019]
When the sealing device 5 on the magnetic encoder 10 side is made black as described above with respect to different colors of the sealing devices 5 and 13 on both sides, the magnetized material such as a rubber magnet is generally black. It is not necessary to perform a coloring process on the sealing device 5 in particular, and the coloring process can be omitted.
Further, since the other sealing device 13 uses a hue other than black for the rubber material 19 itself, a color can be selected at the time of molding, for example, by adding a coloring agent to the rubber material 19, and a coloring process is provided later. Is unnecessary.
[0020]
FIG. 6 shows another embodiment of the present invention. The wheel bearing device C of this embodiment is different from the first embodiment shown in FIGS. 1 to 5 in that the side surface of the rubber member 19 of the sealing device 13 facing the outside of the bearing has a hue other than black. The coating layer 21 other than black is provided on the side surface. That is, it is painted with paint. The side surface of the seal device 5 with the magnetic encoder 10 facing the outer side of the bearing of the multipole magnet 14 is black, and other configurations are the same as those of the first embodiment. Omitted.
[0021]
Also in the case of this embodiment, the side surface of the sealing device 5 with the magnetic encoder 10 is black, and the side surface of the other sealing device 13 is a hue other than black. The inner side and the outer side can be easily distinguished.
The other sealing device 13 requires a coating process, but only needs to apply the coating to the rubber material 19, so that a high degree of freedom in coloring can be obtained. For example, a mark or a character for distinguishing between the outer side and the inner side may be added to the painted surface, or another display may be given.
[0022]
In each of the above embodiments, the case where the inner member 1 is the rotating side and the outer member 2 is the stationary side wheel bearing device C has been described as an example. However, the present invention is not limited to this. The present invention can also be applied to a wheel bearing device in which the stationary side and the outer member are on the rotating side. In this case, the magnetic encoder in the seal device with the magnetic encoder is attached to the outer member on the rotating side, and the seal member is attached to the inner member on the stationary side.
[0023]
【The invention's effect】
The wheel bearing device according to the present invention includes an outer member having a rolling surface on an inner periphery, an inner member having a rolling surface facing the rolling surface on an outer periphery, and a plurality of members interposed between the rolling surfaces. And a pair of seal devices for sealing both ends of the annular space between the outer and inner members, respectively, for one of the seal devices provided with a magnetic encoder having magnetic poles arranged in a circumferential direction in one of the seal devices. In the bearing device, since the colors of the side faces of the one seal device and the other seal device facing the outside of the bearing are different from each other, it is determined whether the end of the wheel bearing device is the outer side or the inner side from the color difference. Easy to identify. Therefore, it is possible to prevent erroneous assembling when assembling to the knuckle or the hub wheel.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a hub wheel assembly state of a wheel bearing device according to a first embodiment of the present invention.
FIG. 2 is a single sectional view of the wheel bearing device.
FIG. 3 is an enlarged sectional view of a portion A in FIG. 2;
FIG. 4 is an explanatory diagram of magnetic poles showing the magnetic encoder in the bearing device from the front.
FIG. 5 is an enlarged sectional view of a portion B in FIG. 2;
FIG. 6 is an enlarged sectional view showing a seal device installation portion of a wheel bearing device according to another embodiment of the present invention.
[Explanation of symbols]
C: wheel bearing device 1 ... inner member 2 ... outer members 1a, 2a ... rolling surface 3 ... rolling element 5 ... sealing device 6 ... hub wheel 10 ... magnetic encoder 13 ... sealing device 14 ... multi-pole magnet 18 ... Knuckle 19: Rubber materials 19a, 19b: Lip portion 20: Third annular seal plate (core metal)
21 ... Coating layer

Claims (5)

内周に転走面を有する外方部材と、上記転走面に対向する転走面を外周に有する内方部材と、これら転走面間に介在した複数の転動体と、上記外内の部材間の環状空間の両端部をそれぞれ密封する一対のシール装置とを備え、一方のシール装置に、円周方向に磁極が並ぶ磁気エンコーダが設けられた車輪用軸受装置において、一方のシール装置と他方のシール装置の軸受外側を向く側面の色を互いに異ならせたことを特徴とする車輪用軸受装置。An outer member having a rolling surface on the inner periphery, an inner member having a rolling surface facing the rolling surface on the outer periphery, a plurality of rolling elements interposed between these rolling surfaces, A pair of seal devices for sealing both end portions of the annular space between the members, respectively, and in a wheel bearing device provided with a magnetic encoder in which magnetic poles are arranged in a circumferential direction in one seal device, one seal device and A bearing device for a wheel, wherein the colors of the side surfaces of the other sealing device facing the outside of the bearing are different from each other. 請求項１において、上記外方部材および内方部材は、外見がアウター側とインナー側とにつき、互いに略対称形状のものである車輪用軸受装置。2. The wheel bearing device according to claim 1, wherein the outer member and the inner member are substantially symmetrical in appearance on the outer side and the inner side. 請求項１または請求項２において、上記一方のシール装置の上記軸受外側を向く側面が上記エンコーダの表面であり、このエンコーダの表面が黒色であって、他方のシール装置の軸受外側を向く側面を、黒色以外の色相にしたものである車輪用軸受装置。In Claim 1 or Claim 2, the side surface of the one seal device facing the bearing outside is the surface of the encoder, the surface of the encoder is black, and the side surface of the other seal device facing the bearing outside is the same. , A wheel bearing device having a hue other than black. 請求項１ないし請求項３のいずれかにおいて、他方のシール装置は、リップ部を有するゴム材を、芯金に対してその軸受外側を向く側面を覆うように固着したものであり、上記ゴム材を、上記一方のシール装置の軸受外側を向く面の色相と異なるものとした車輪用軸受装置。The other sealing device according to any one of claims 1 to 3, wherein a rubber material having a lip portion is fixed to a cored bar so as to cover a side surface facing the outside of the bearing. The bearing device for a wheel, wherein the hue of the surface of the one sealing device facing the outside of the bearing is different. 請求項１ないし請求項３のいずれかにおいて、他方のシール装置は、リップ部を有するゴム材を、芯金に対してその軸受外側を向く側面を覆うように固着したものであり、上記ゴム材の軸受外側を向く側面に、上記一方のシール装置の軸受外側を向く面の色相と異なる色相の塗装を施したものである車輪用軸受装置。The other sealing device according to any one of claims 1 to 3, wherein a rubber material having a lip portion is fixed to a cored bar so as to cover a side surface facing the outside of the bearing. A bearing device for a wheel, wherein the side surface facing the outside of the bearing is coated with a hue different from the hue of the surface of the one sealing device facing the outside of the bearing.
JP2002350915A 2002-12-03 2002-12-03 Bearing device for wheel Pending JP2004183769A (en)

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Publication number Priority date Publication date Assignee Title
JP2006275884A (en) * 2005-03-30 2006-10-12 Jtekt Corp Bearing device and its testing method
JP2007085478A (en) * 2005-09-22 2007-04-05 Nsk Ltd Combination seal ring and rolling bearing unit with combination seal ring for supporting wheel
JP2007211848A (en) * 2006-02-08 2007-08-23 Ntn Corp Wheel bearing device
JP2008284614A (en) * 2007-05-15 2008-11-27 Jtekt Corp Bearing device and jig for preventing erroneous assembly of bearing

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JPH09203415A (en) * 1996-01-26 1997-08-05 Nippon Seiko Kk Rolling bearing unit with tone wheel
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JP2002055113A (en) * 2000-08-09 2002-02-20 Ntn Corp Bearing device for wheel
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JPH0651555U (en) * 1992-12-22 1994-07-15 日本精工株式会社 Ball bearing with seal
JPH0882324A (en) * 1994-09-09 1996-03-26 Nippon Densan Corp Bearing structure body
JPH09203415A (en) * 1996-01-26 1997-08-05 Nippon Seiko Kk Rolling bearing unit with tone wheel
JPH11218140A (en) * 1998-01-30 1999-08-10 Sii Micro Device Kk Rolling bearing, oscillating arm, rotor device, and manufacture of rolling bearing
JP2001124074A (en) * 1999-10-27 2001-05-08 Ntn Corp Support device of rotating body
JP2002055113A (en) * 2000-08-09 2002-02-20 Ntn Corp Bearing device for wheel
JP2002155962A (en) * 2000-09-05 2002-05-31 Ntn Corp Bearing for wheel
JP2002147478A (en) * 2000-11-10 2002-05-22 Ntn Corp Wheel bearing

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JP2006275884A (en) * 2005-03-30 2006-10-12 Jtekt Corp Bearing device and its testing method
JP2007085478A (en) * 2005-09-22 2007-04-05 Nsk Ltd Combination seal ring and rolling bearing unit with combination seal ring for supporting wheel
JP4720400B2 (en) * 2005-09-22 2011-07-13 日本精工株式会社 Rolling bearing unit for wheel support with combined seal ring and manufacturing method thereof
JP2007211848A (en) * 2006-02-08 2007-08-23 Ntn Corp Wheel bearing device
JP2008284614A (en) * 2007-05-15 2008-11-27 Jtekt Corp Bearing device and jig for preventing erroneous assembly of bearing

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