JP2001289254A - Bearing for axle - Google Patents
Bearing for axleInfo
- Publication number
- JP2001289254A JP2001289254A JP2000135513A JP2000135513A JP2001289254A JP 2001289254 A JP2001289254 A JP 2001289254A JP 2000135513 A JP2000135513 A JP 2000135513A JP 2000135513 A JP2000135513 A JP 2000135513A JP 2001289254 A JP2001289254 A JP 2001289254A
- Authority
- JP
- Japan
- Prior art keywords
- seal plate
- bearing
- seal
- plate
- tip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
-
- 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
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
-
- 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
- F16C2220/00—Shaping
- F16C2220/60—Shaping by removing material, e.g. machining
- F16C2220/70—Shaping by removing material, e.g. machining by grinding
-
- 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
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/10—Force connections, e.g. clamping
- F16C2226/12—Force connections, e.g. clamping by press-fit, e.g. plug-in
-
- 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
- F16C2233/00—Monitoring condition, e.g. temperature, load, vibration
-
- 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
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/64—Special methods of manufacture
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Of Bearings (AREA)
- Rolling Contact Bearings (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、自動車等におけ
る車輪用軸受に関し、特に回転検出用のエンコーダ格子
を一体化した密封構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing for a wheel in an automobile or the like, and more particularly, to a sealing structure in which an encoder lattice for detecting rotation is integrated.
【０００２】[0002]
【従来の技術】従来、図１１に示すように転動体１０３
を介して転接する内方部材１０１および外方部材１０２
間にシール装置１０５を設けた車輪用軸受において、シ
ール装置１０５にエンコーダ格子１０６を一体化させた
ものが提案されている（例えば、特開平６−２８１０１
８号）。シール装置１０５は、各々断面Ｌ字状とされた
第１，第２のシール板１０７，１０８を内方部材１０１
および外方部材１０２にそれぞれ嵌合させ、第２のシー
ル板１０８にリップ１０９を設けたものである。第１の
シール板１０７は、スリンガと呼ばれる。エンコーダ格
子１０６は、磁性体粉が混入された弾性部材であり、第
１のシール板１０７に加硫接着されている。エンコーダ
格子１０６は、円周方向に交互に磁極が形成されたもの
であり、対面配置された磁気センサ１１０で検出され
る。2. Description of the Related Art Conventionally, as shown in FIG.
Inner member 101 and outer member 102 which are rolled through
As a wheel bearing provided with a sealing device 105 between the sealing device 105 and the encoder lattice 106 are integrated (for example, JP-A-6-28101).
No. 8). The sealing device 105 couples the first and second sealing plates 107 and 108 each having an L-shaped cross section to the inner member 101.
And a lip 109 provided on the second seal plate 108. The first seal plate 107 is called a slinger. The encoder lattice 106 is an elastic member mixed with magnetic powder, and is vulcanized and bonded to the first seal plate 107. The encoder grating 106 is formed by alternately forming magnetic poles in the circumferential direction, and is detected by the magnetic sensor 110 disposed in a face-to-face manner.
【０００３】[0003]
【発明が解決しようとする課題】スリンガとなるシール
板１０７と回転輪となる内方部材１０１とは、圧入状態
に嵌合しているが、その嵌合部１１１から微量の水が軸
受内部へ浸入する恐れがある。このような水の浸入が生
じると、シール板１０７，１０８に錆が発生し、また内
部のグリースが劣化し、軸受寿命が低下する。そこで、
シール板１０７の内方部材１０１との嵌合部１１１にゴ
ム層を設けることを考えた。しかし、厚いゴム層を介在
させると、嵌合力が不足し、シール板１０７の抜けや軸
受内への移動が生じる恐れがある。上記嵌合部１１１に
パッキングを介在させた場合も、抜けや移動の問題が発
生する。弾性部材を介在させる代わりに、シール板１０
７自体の材質を柔らかなものとして密着性を向上させる
ことは可能であるが、そのような材質は非磁性体である
ため、エンコーダ格子１０６の磁気コアとなる機能が得
られず、磁束密度が不足する。The seal plate 107 serving as a slinger and the inner member 101 serving as a rotating wheel are fitted in a press-fit state, but a small amount of water enters the bearing from the fitting portion 111. There is a risk of intrusion. When such intrusion of water occurs, rust is generated on the seal plates 107 and 108, the internal grease is deteriorated, and the bearing life is shortened. Therefore,
It is considered that a rubber layer is provided at a fitting portion 111 of the seal plate 107 with the inner member 101. However, if a thick rubber layer is interposed, the fitting force becomes insufficient, and there is a possibility that the seal plate 107 may come off or move into the bearing. In the case where the packing is interposed in the fitting portion 111, the problem of detachment or movement occurs. Instead of interposing an elastic member, the sealing plate 10
Although it is possible to improve the adhesion by using a soft material for itself 7, since such a material is a non-magnetic material, the function as the magnetic core of the encoder lattice 106 cannot be obtained, and the magnetic flux density is low. Run short.
【０００４】シール板１０７の防錆性については、一般
的に使用されるＳＵＳ４３０等の耐食性の劣る磁性材に
代えて、ＳＵＳ３０４相当の耐食性を有する磁性ステン
レス（ＳＵＳ４３０ＭＡ、ＳＵＳ４３０にニオブ，Ｎｉ
等を添加して耐食性を向上させたもの）を使用すること
で対応でき、磁束密度についても、ＳＵＳ４３０ＭＡで
はＳＵＳ４３０と同様に得られる。しかし、材質が高価
であるうえ、このような材質を用いても、水の浸入は防
げず、グリースの劣化による軸受寿命の低下は防げな
い。[0004] Regarding the rust prevention of the seal plate 107, a magnetic stainless steel (SUS430MA, SUS430 with niobium or Ni) having corrosion resistance equivalent to SUS304 is used instead of a generally used magnetic material such as SUS430 having poor corrosion resistance.
SUS430MA can be obtained in the same manner as SUS430 in terms of magnetic flux density. However, the material is expensive, and even if such a material is used, intrusion of water cannot be prevented, and reduction in bearing life due to deterioration of grease cannot be prevented.
【０００５】この発明の目的は、シール板の嵌合部から
浸入する水の軸受内への流入が防止できて、軸受寿命の
向上が図れ、またシール板の抜けや移動の問題が生じ
ず、かつ磁束密度の確保が容易な車輪用軸受を提供する
ことである。SUMMARY OF THE INVENTION It is an object of the present invention to prevent the water entering from the fitting portion of the seal plate from flowing into the bearing, improve the life of the bearing, and prevent the seal plate from coming off or moving. Another object of the present invention is to provide a wheel bearing that can easily secure a magnetic flux density.
【０００６】[0006]
【課題を解決するための手段】この発明の車輪用軸受
は、内方部材および外方部材と、これら内外の部材間に
収容される複数の転動体と、上記内外の部材間の端部環
状空間を密封するシール装置とからなる車輪用軸受にお
いて、上記シール装置は、上記内方部材と外方部材のう
ちの互いに異なる部材に各々取付けられた第１および第
２の環状のシール板を有し、両シール板は、各々円筒部
と立板部とでなる断面Ｌ字状に形成されて互いに対向
し、第１のシール板は内方部材および外方部材のうちの
回転側の部材に嵌合され、立板部は軸受外方側に配され
ると共に、この立板部に磁性体粉が混入された弾性部材
が加硫接着されて、この弾性部材は周方向に交互に磁極
が形成され、第２のシール板の円筒部と上記第１のシー
ル板の立板部の先端とを僅かな径方向隙間をもって対峙
させ、第２のシール板は上記立板部に摺接するサイドリ
ップと、上記回転側部材のシール板嵌合部の近傍の外径
面に摺接するラジアルリップとを一体に有するものとし
たことを特徴とする。この構成によると、第１のシール
板の立板部に、磁性体粉の混入された弾性部材が加硫接
着され、周方向に交互に磁極が形成されているため、こ
の弾性部材でいわゆるエンコーダ格子が構成され、これ
に対面する磁気センサで回転検出を行うことができる。
内外の部材間のシールについては、第２のシール板に設
けられた各シールリップの摺接と、第２のシール板の円
筒部に第１のシール板の立板部先端が僅かな径方向隙間
で対峙することで構成されるラビリンスシールとで得ら
れる。上記シールリップのうちのラジアルリップは、回
転側部材のシール板嵌合部の近傍の外径面に摺接するた
め、第１のシール板と回転側部材との嵌合部から水が浸
入しても、ラジアルリップの摺接部で軸受内への浸入が
阻止される。そのため、浸入水でグリースが劣化するこ
とがなく、軸受寿命が向上する。また、このようにラジ
アルリップでシール性が確保されるため、第１のシール
板の材質が制限されず、適宜の磁性体を用いることで、
その立板部に設けられた弾性部材によるエンコーダ格子
の磁束密度を高めることができる。SUMMARY OF THE INVENTION A wheel bearing according to the present invention comprises an inner member and an outer member, a plurality of rolling elements housed between the inner and outer members, and an annular end portion between the inner and outer members. In a wheel bearing comprising a seal device for sealing a space, the seal device has first and second annular seal plates respectively attached to different ones of the inner member and the outer member. The two seal plates are formed in an L-shaped cross section including a cylindrical portion and an upright plate portion, and face each other. The first seal plate is a member on the rotating side of the inner member and the outer member. The upright portion is arranged on the outer side of the bearing, and an elastic member mixed with magnetic powder is vulcanized and bonded to the upright portion, and the elastic member has magnetic poles alternately in the circumferential direction. And a cylindrical portion of the second seal plate and a tip of an upright portion of the first seal plate. The second seal plate has a side lip that slides on the upright portion and a radial lip that slides on the outer diameter surface near the seal plate fitting portion of the rotating member. It is characterized by having it in. According to this configuration, the elastic member mixed with the magnetic powder is vulcanized and bonded to the upright portion of the first seal plate, and the magnetic poles are formed alternately in the circumferential direction. A grating is formed, and rotation can be detected by a magnetic sensor facing the grating.
As for the seal between the inner and outer members, the sliding contact of each seal lip provided on the second seal plate and the tip of the upright plate portion of the first seal plate on the cylindrical portion of the second seal plate have a slight radial direction. It is obtained with a labyrinth seal constituted by facing each other with a gap. Since the radial lip of the seal lip is in sliding contact with the outer diameter surface near the seal plate fitting portion of the rotating member, water enters from the fitting portion between the first seal plate and the rotating member. Also, the sliding contact of the radial lip prevents penetration into the bearing. Therefore, the grease does not deteriorate due to the intruding water, and the bearing life is improved. Further, since the sealing property is secured by the radial lip, the material of the first seal plate is not limited, and by using an appropriate magnetic material,
The magnetic flux density of the encoder lattice can be increased by the elastic member provided on the upright portion.
【０００７】この発明において、上記内方部材および外
方部材のうちの回転側の部材に、第１のシール板の厚み
相当の段差をもって小径となる段付部を設け、この段付
部の外径面に第１のシール板の円筒部を圧入しても良
い。このように、段付部を設けて第１のシール板を嵌合
させることにより、第１のシール板の軸受内方への移動
を防止することができ、第１のシール板の軸方向の設置
位置が規制されて、サイドリップの適切な締代が維持さ
れる。上記段付部は、シール板の円筒部の厚み相当の深
さであるため、段付部の形成に伴う回転側部材の強度劣
化や、第１のシール板の大型化の問題がなく、また段付
部が浅くて係合不十分となることも避けられる。In the present invention, the rotating member of the inner member and the outer member is provided with a stepped portion having a small diameter with a step corresponding to the thickness of the first seal plate. The cylindrical portion of the first seal plate may be pressed into the radial surface. Thus, by providing the stepped portion and fitting the first seal plate, the inward movement of the first seal plate in the bearing can be prevented, and the axial direction of the first seal plate can be prevented. The installation position is regulated, and an appropriate interference of the side lip is maintained. Since the stepped portion has a depth equivalent to the thickness of the cylindrical portion of the seal plate, there is no problem of deterioration in the strength of the rotating member due to the formation of the stepped portion, and no increase in the size of the first seal plate. It is also possible to prevent the stepped portion from being shallow and insufficiently engaged.
【０００８】この発明の上記各構成の場合に、上記第２
のシール板のラジアルリップを軸受外側へ向かって傾斜
させても良い。ラジアルリップを軸受外側へ向かって傾
斜させた場合、逆向きの傾斜の場合に比べて、軸受外部
からの水や塵埃の侵入防止作用が高められる。In the case of each of the above configurations of the present invention, the second
The radial lip of the seal plate may be inclined toward the outside of the bearing. When the radial lip is inclined toward the outside of the bearing, the effect of preventing water and dust from entering from outside the bearing is enhanced as compared with the case where the radial lip is inclined in the opposite direction.
【０００９】この発明の上記各構成の場合に、上記第２
のシール板のサイドリップを、径方向の内外２か所に設
けても良い。サイドリップは、主に軸受外から軸受内へ
の水の浸入防止機能を奏するものであり、このサイドリ
ップを内外２か所に設けることで、軸受内への水の浸入
防止機能が高められる。In the case of each of the above configurations of the present invention, the second
The side lips of the seal plate may be provided at two locations inside and outside in the radial direction. The side lip mainly has a function of preventing water from entering the bearing from outside the bearing. By providing the side lip at two locations inside and outside, the function of preventing water from entering the bearing is enhanced.
【００１０】この発明の上記各構成の場合に、上記第１
のシール板を、フェライト系ステンレスで形成されたも
のとしても良い。フェライト系ステンレスは、強磁性体
であり、これを第１のシール板に用いることで、エンコ
ーダ格子となる弾性部材の磁束密度を高めることができ
る。In each of the above configurations of the present invention, the first
May be made of ferritic stainless steel. Ferrite stainless steel is a ferromagnetic material, and by using this for the first seal plate, it is possible to increase the magnetic flux density of the elastic member serving as the encoder lattice.
【００１１】この発明の上記各構成の場合に、上記第１
のシール板の立板部の先端と上記第２のシール板の円筒
部との少なくとも一方に、これらシール板に一体化され
た弾性部材の一部で形成される先端覆い部を設け、この
先端覆い部を含む第１のシール板の立板部先端の最大径
部が、第２のシール板の円筒部先端の最小径部よりも大
径でかつ軸受内側に位置するものとしても良い。この発
明の基本構成では、第２のシール板のラジアルリップが
第１のシール板の円筒部に摺接していないため、そのま
までは軸受への未組み込み状態で、第１，第２のシール
板が相互に分離する。そのため、搬送時や軸受への組立
作業が煩雑になり、工数が増える。これに対して、この
請求項の発明では、上記のように先端覆い部を設け、第
１のシール板の立板部先端の最大径部が、第２のシール
板の円筒部先端の最小径部よりも大径でかつ軸受内側に
位置するものとしたため、未組立状態において、第１の
シール板と第２のシール板とが分離することが防止さ
れ、一つの部品として取り扱うことができる。第１，第
２のシール板は、弾性部材の先端覆い部で相互に抜け止
め状態に係合させるので、相互に組み込み状態とした
り、分解したりすることが、先端覆い部の弾性変形で可
能になる。また、このような先端覆い部を設けることに
より、ラビリンスシールを構成する隙間の断面形状が蛇
行状となり、シール効果も向上する。In each of the above configurations of the present invention, the first
At least one of the tip of the standing plate portion of the seal plate and the cylindrical portion of the second seal plate is provided with a tip covering portion formed by a part of an elastic member integrated with the seal plate. The maximum diameter portion at the tip of the upright portion of the first seal plate including the cover portion may be larger in diameter than the minimum diameter portion at the tip of the cylindrical portion of the second seal plate and located inside the bearing. In the basic configuration of the present invention, since the radial lip of the second seal plate does not slide on the cylindrical portion of the first seal plate, the first and second seal plates are not assembled in the bearing as they are. Separate from each other. For this reason, the work of assembling to the bearing during transportation and the like becomes complicated, and the number of steps increases. On the other hand, in the present invention, the tip cover is provided as described above, and the maximum diameter at the tip of the standing plate portion of the first seal plate is the minimum diameter at the tip of the cylindrical portion of the second seal plate. The first seal plate and the second seal plate are prevented from being separated from each other in an unassembled state, and can be handled as one part. Since the first and second seal plates are engaged with each other in a state where they can be prevented from coming off at the distal end covering portion of the elastic member, they can be assembled into each other or disassembled by elastic deformation of the distal end covering portion. become. In addition, by providing such a front end covering portion, the cross-sectional shape of the gap forming the labyrinth seal becomes meandering, and the sealing effect is also improved.
【００１２】[0012]
【発明の実施の形態】この発明の実施形態を図面と共に
説明する。図１に示すように、この車輪用軸受は、内方
部材１および外方部材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、内外の部材間の端部環
状空間を密封するシール装置５とからなる。内方部材１
および外方部材２は、転動体３の軌道面１ａ，２ａを有
しており、各軌道面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。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。Embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the wheel bearing includes an inner member 1 and an outer member 2, a plurality of rolling elements 3 housed between the inner and outer members 1 and 2, and an end portion between the inner and outer members. And a sealing device 5 for sealing the annular space. Inner member 1
The outer member 2 has the raceway surfaces 1a, 2a of the rolling elements 3, and each raceway surface 1a, 2a is formed in a groove shape. The inner member 1 and the outer member 2 are members on the inner peripheral side and the outer peripheral side 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. Also, the inner member 1
May be an axis. The rolling element 3 is formed of a ball or a roller. In this example, a ball is used.
【００１３】図３は、車輪用軸受の全体構成の一例を示
す。この車輪用軸受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、その軸受内輪は、ハ
ブ輪６と、このハブ輪６の端部外径に嵌合した別体の内
輪１Ａとで構成される。これらハブ輪６および別体内輪
１Ａに各転動体列の軌道面が形成されている。上記の別
体内輪１Ａが、図１の例における内方部材１となる。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のハブ部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、
フランジ２ｂを有する軸受外輪からなり、ナックル等か
らなるハウジング１０に取付けられる。外方部材２は、
両転動体列の軌道面を有するものとされている。転動体
３は各列毎に保持器４で保持されている。内方部材１と
外方部材２の間の環状空間は、一端、つまり車軸中央側
の端部が上記のシール装置５で密封されている。外方部
材２とハブ輪６との間の環状空間の端部は、別のシール
装置１３で密封されている。FIG. 3 shows an example of the overall structure of the wheel bearing. The wheel bearing is a double row rolling bearing, more specifically, a double row angular contact ball bearing. The bearing inner ring has a hub wheel 6 and a separate body fitted to the end outer diameter of the hub wheel 6. It is composed of the inner ring 1A. A raceway surface of each rolling element row is formed on the hub wheel 6 and the separate inner ring 1A. The separate inner ring 1A serves as the inner member 1 in the example of FIG. 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 hub 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 is
It is composed of a bearing outer ring having a flange 2b and is attached to a housing 10 composed of a knuckle or the like. The outer member 2 is
It has a raceway surface of both rolling element rows. The rolling elements 3 are held by a holder 4 for each row. One end of the annular space between the inner member 1 and the outer member 2, that is, the end on the center side of the axle, is sealed by the sealing device 5. The end of the annular space between the outer member 2 and the hub wheel 6 is sealed with another sealing device 13.
【００１４】シール装置５は、図１，図２に示すよう
に、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の環状のシール板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
シール板１１，１２は、各々円筒部１１ａ，１２ａと立
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のシール板１１は、内方部材１およ
び外方部材２のうちの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のシール板１１は、円
筒部１１ａが、内方部材１の外径面に形成された段付部
２０の外径面に嵌合している。段付部２０は、第１のシ
ール板１１の厚み相当の段差をもって小径となる部分で
あり、その軸方向幅は、第１のシール板１１の円筒部１
１ａの先端が段付部２０の側壁面に係合する幅に設けら
れている。例えば、段付部２０の軸方向幅は、円筒部１
１ａと略等しい幅とされている。As shown in FIGS. 1 and 2, the seal device 5 has first and second annular seal 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. The two seal plates 11 and 12 are formed in an L-shaped cross section including the cylindrical portions 11a and 12a and the upright plates 11b and 12b, and face each other. The first seal plate 11 is fitted to the inner member 1, which is a member on the rotation side, of the inner member 1 and the outer member 2, and serves as a slinger. In the first seal plate 11, the cylindrical portion 11 a is fitted to the outer diameter surface of the stepped portion 20 formed on the outer diameter surface of the inner member 1. The stepped portion 20 is a portion having a small diameter with a step corresponding to the thickness of the first seal plate 11, and its axial width is the cylindrical portion 1 of the first seal plate 11.
The tip of 1 a is provided with a width that engages with the side wall surface of the stepped portion 20. For example, the axial width of the stepped portion 20 is the cylindrical portion 1
The width is substantially equal to 1a.
【００１５】第１のシール板１１の立板部１１ｂは、軸
受外方側に配され、磁性体粉が混入された弾性部材１４
が加硫接着されている。この弾性部材１４は、エンコー
ダ格子となるものであり、周方向に交互に磁極Ｎ，Ｓ
（図２）が形成され、いわゆるゴム磁石とされている。
磁極Ｎ，Ｓは、ピッチ円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。このエンコーダ格子と
なる弾性部材１４に対面して、図１のように磁気センサ
１５を配置することで、車輪回転速度の検出用のロータ
リエンコーダが構成される。The upright portion 11b of the first seal plate 11 is disposed on the outer side of the bearing, and is provided with an elastic member 14 mixed with magnetic powder.
Are vulcanized and adhered. The elastic member 14 serves as an encoder lattice, and has magnetic poles N and S alternately in the circumferential direction.
(FIG. 2) is formed, which is a so-called rubber magnet.
The magnetic poles N and S are formed to have a predetermined pitch p in the pitch circle PCD. By arranging the magnetic sensor 15 as shown in FIG. 1 so as to face the elastic member 14 serving as the encoder lattice, a rotary encoder for detecting the wheel rotation speed is configured.
【００１６】第２のシール板１２は、第１のシール板１
１の立板部１１ｂに摺接するサイドリップ１６ａと、内
方部材１のシール板嵌合部１８の近傍の外径面１９に摺
接するラジアルリップ１６ｂとを一体に有する。これら
リップ１６ａ，１６ｂは、第２のシール板１２に加硫接
着されたエラストマからなる弾性部材１６の一部として
設けられている。サイドリップ１６ａは、先端が立板部
１１ｂの先端側へ延びるように傾斜しており、ラジアル
リップ１６ｂは、先端が軸受内方へ延びるように傾斜し
ている。第２のシール板１２の立板部１２ｂは、先端部
よりも基端部が軸受内側へ位置するようにＳ字ないしＺ
字状に屈曲しており、これによりシール板１２の剛性が
高められると共に、弾性部材１６の厚肉化が容易とされ
ている。The second seal plate 12 is a first seal plate 1
1 has a side lip 16a slidingly in contact with the upright plate portion 11b and a radial lip 16b slidingly contacting the outer diameter surface 19 near the seal plate fitting portion 18 of the inner member 1. These lips 16a and 16b are provided as a part of an elastic member 16 made of an elastomer which is vulcanized and bonded to the second seal plate 12. The side lip 16a is inclined such that the distal end extends toward the distal end of the standing plate portion 11b, and the radial lip 16b is inclined such that the distal end extends inward of the bearing. The upright plate portion 12b of the second seal plate 12 is S-shaped or Z-shaped so that the base end is located closer to the bearing inner side than the tip end.
The rigidity of the seal plate 12 is increased, and the thickness of the elastic member 16 is easily increased.
【００１７】第２のシール板１２の円筒部１２ａと第１
のシール板１１の立板部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１
７を構成している。第１のシール板１１の立板部１１ｂ
の先面、および第２のシール板１２の円筒部の先端は、
各々弾性部材１４，１６の一部となる先端覆い部１４
ａ，１６ｄで覆われており、上記ラビリンスシール１７
は、具体的には，これら先端覆い部１４ａ，１６ｄ間の
隙間で形成される。なお、これら先端覆い部１４ａ，１
６ｄは、両方とも省略しても良く、またいずれか片方の
みを省略しても良い。The cylindrical portion 12a of the second seal plate 12 and the first
Of the sealing plate 11 with a slight radial gap, and the labyrinth seal 1
7. Standing plate portion 11b of first seal plate 11
And the tip of the cylindrical portion of the second seal plate 12
Tip covering portions 14 which become part of the elastic members 14 and 16, respectively.
a, 16d, and the labyrinth seal 17
Specifically, is formed by a gap between the tip covering portions 14a and 16d. Note that these tip covering portions 14a, 1
For 6d, both may be omitted, or only one of them may be omitted.
【００１８】第１のシール板１１は、強磁性体等の磁性
体の鋼板、例えばフェライト系のステンレス鋼板（ＪＩ
Ｓ規格のＳＵＳ４３０系等）や、防錆処理された圧延鋼
板等が用いられる。第２のシール板１２は、鋼板、例え
ば非磁性体であるオーステナイト系のステンレス鋼板
（ＳＵＳ３０４系等）や、防錆処理された圧延鋼板等が
用いられる。例えば、第１のシール板１１をフェライト
系のステンレス鋼板とし、第２のシール板１２をオース
テナイト系のステンレス鋼板としても良い。The first seal plate 11 is made of a magnetic steel plate such as a ferromagnetic material, for example, a ferrite stainless steel plate (JI).
For example, S-standard SUS430 series) or a rust-proofed rolled steel plate is used. As the second seal plate 12, a steel plate, for example, a non-magnetic austenitic stainless steel plate (SUS304 or the like), a rust-proofed rolled steel plate, or the like is used. For example, the first seal plate 11 may be a ferritic stainless steel plate, and the second seal plate 12 may be an austenitic stainless steel plate.
【００１９】この構成の車輪用軸受によると、内外の部
材１，２間のシールについては、第２のシール板１２に
設けられた各シールリップ１６ａ，１６ｂの摺接と、第
２のシール板１２の円筒部１２ａに第１のシール板１１
の立板部１１ｂの先端が僅かな径方向隙間で対峙するこ
とで構成されるラビリンスシール１７とで得られる。ラ
ジアルリップ１６ｂは、回転側部材である内方部材１の
シール板嵌合部の近傍の外径面に摺接するため、第１の
シール板１１と内方部材１との嵌合部１８から水が浸入
しても、ラジアルリップ１６ｂの摺接部で軸受内への浸
入が阻止される。そのため、浸入水でグリースが劣化す
ることがなく、軸受寿命が向上する。また、このように
ラジアルリップ１６ｂでシール性が確保されるため、第
１のシール板１１の材質が制限されず、適宜の強磁性体
を用いることで、その立板部１１ｂに設けられた弾性部
材１４によるエンコーダ格子の磁束密度を高めることが
できる。また、内方部材１に段付部２０を設けて第１の
シール板１１を嵌合させたため、第１のシール板１１の
軸受内方への移動を防止することができ、第１のシール
板１１の軸方向の設置位置が規制されて、サイドリップ
１６ａの適切な締代が維持される。上記段付部２０は、
シール板１１の円筒部１１ａの厚み相当の深さであるた
め、段付部１１の形成に伴う内方部材１の強度劣化や、
第１のシール板１１の大型化の問題がなく、また段付部
１１が浅くて係合不十分となることも避けられる。According to the wheel bearing of this configuration, the seal between the inner and outer members 1 and 2 is slidably contacted by the respective seal lips 16a and 16b provided on the second seal plate 12 and the second seal plate. The first seal plate 11 is attached to the cylindrical portion 12a
And a labyrinth seal 17 constituted by the tip of the standing plate portion 11b facing each other with a slight radial gap. Since the radial lip 16b comes into sliding contact with the outer diameter surface near the seal plate fitting portion of the inner member 1 which is the rotating side member, the water flows from the fitting portion 18 between the first seal plate 11 and the inner member 1. , The sliding contact of the radial lip 16b prevents penetration into the bearing. Therefore, the grease does not deteriorate due to the intruding water, and the bearing life is improved. In addition, since the sealing properties are secured by the radial lip 16b, the material of the first sealing plate 11 is not limited, and by using an appropriate ferromagnetic material, the elasticity provided on the standing plate portion 11b can be improved. The magnetic flux density of the encoder lattice by the member 14 can be increased. In addition, since the stepped portion 20 is provided on the inner member 1 and the first seal plate 11 is fitted, the inward movement of the first seal plate 11 in the bearing can be prevented, and the first seal plate can be prevented. The installation position of the plate 11 in the axial direction is regulated, and an appropriate interference of the side lip 16a is maintained. The stepped portion 20 includes:
Since the depth is equivalent to the thickness of the cylindrical portion 11a of the sealing plate 11, the strength of the inner member 1 is deteriorated due to the formation of the stepped portion 11,
There is no problem of increasing the size of the first seal plate 11, and it is also possible to prevent the stepped portion 11 from being shallow and insufficiently engaged.
【００２０】図４は、この発明の他の実施形態を示す。
この実施形態は、図１に示した実施形態において、ラジ
アルリップ１６ｂを、その先端が軸受内側へ延びるよう
に傾斜させた構成に代えて、このラジアルリップ１６ｂ
を、その先端が軸受外側へ延びるように傾斜させたもの
である。その他の事項は図１の実施形態と同じである。
このように、ラジアルリップ１６ｂを、その先端が軸受
外側へ延びるように傾斜させた場合、軸受外から軸受内
への水の浸入防止効果が高くなる。そのため、軸受外か
らサイドリップ１６ａや嵌合部１８を介して浸入した水
が、ラジアルリップ１６ｂを超えて軸受内に浸入するこ
とに対して、確実に防止される。FIG. 4 shows another embodiment of the present invention.
This embodiment is different from the embodiment shown in FIG. 1 in that the radial lip 16b is replaced with a configuration in which the tip of the radial lip 16b is inclined so as to extend inside the bearing.
Is inclined such that the tip extends outside the bearing. Other items are the same as those of the embodiment of FIG.
In this manner, when the radial lip 16b is inclined such that the tip thereof extends to the outside of the bearing, the effect of preventing water from entering the inside of the bearing from outside the bearing is enhanced. Therefore, it is possible to reliably prevent water that has entered from outside the bearing via the side lip 16a and the fitting portion 18 from entering the bearing beyond the radial lip 16b.
【００２１】図５は、この発明のさらに他の実施形態を
示す。この実施形態は、図４に示した実施形態におい
て、サイドリップ１６ａを、径方向の内外に離れた２か
所に設けたものである。その他の事項は図４の実施形態
と同じである。サイドリップ１６ａは、主に軸受外から
軸受内への水の浸入防止機能を奏するものであり、この
サイドリップ１６ａを内外２か所に設けることで、軸受
内への水の浸入防止機能が高められる。FIG. 5 shows still another embodiment of the present invention. This embodiment is different from the embodiment shown in FIG. 4 in that side lips 16a are provided at two places separated inward and outward in the radial direction. Other items are the same as in the embodiment of FIG. The side lip 16a mainly has a function of preventing water from entering the bearing from outside the bearing. By providing the side lip 16a at two locations inside and outside, the function of preventing water from entering the bearing is enhanced. Can be
【００２２】図６は、この発明のさらに他の実施形態を
示す。この実施形態は、図５の実施形態において、第１
のシール板１１の先端覆い部１４ａの外径面に、軸受内
側部分で環状の外周突条１４ａａを形成し、かつ第２の
シール板１１の先端覆い部１６ｄの内径面に環状の内周
突条１６ｄａを形成したものである。これら外周突条１
４ａａおよび内周突条１６ｄａは、第１のシール板１１
の立板部先端の最大径部および第２のシール板１２の円
筒部先端の最小径部を構成する。外周突条１４ａａは、
内周突条１６ｄａよりも軸受内側に位置し、かつその外
径が内周突条１６ｄａの内径よりも大きく形成されてい
る。外周突条１４ａａおよび内周突条１６ｄａの対向面
は傾斜面とされている。その他の事項は図６の実施形態
と同じである。FIG. 6 shows still another embodiment of the present invention. This embodiment differs from the embodiment of FIG.
An annular outer circumferential ridge 14aa is formed on the outer diameter surface of the distal end covering portion 14a of the seal plate 11 at the bearing inner portion, and an annular inner peripheral protrusion is formed on the inner diameter surface of the distal end covering portion 16d of the second seal plate 11. The ridge 16da is formed. These outer ridges 1
4aa and the inner peripheral ridge 16da are the first seal plate 11
And the minimum diameter portion at the tip of the cylindrical portion of the second seal plate 12. The outer circumferential ridge 14aa is
It is located on the inner side of the bearing with respect to the inner peripheral ridge 16da, and its outer diameter is formed larger than the inner diameter of the inner peripheral ridge 16da. The opposing surfaces of the outer peripheral ridge 14aa and the inner peripheral ridge 16da are inclined surfaces. Other items are the same as those of the embodiment of FIG.
【００２３】この構成の場合、外周突条１４ａａと内周
突条１６ｄａとが軸方向に係合することで、第１のシー
ル板１１と第２のシール板１２の軸受への未組立時にお
ける分離が防止される。すなわち、基本構成では、第２
のシール板１２のラジアルリップ１６ｂが第１のシール
板１１の円筒部１１ａに摺接していないため、そのまま
では軸受への未組み込み状態で、第１，第２のシール板
１１，１２が相互に分離される。そのため、搬送時や軸
受への組立作業が煩雑になり、工数が増える。これに対
して、上記のように外周突条１４ａａと内周突条１６ｄ
ａとを、軸方向に係合するように設けることで、未組立
状態において、第１のシール板１１と第２のシール板１
２とが分離されることが防止され、一つの部品として取
り扱うことができる。そのため、搬送時は勿論のこと、
軸受への組立工数が削減でき、組立等が簡単になる。ま
た、このような外周突条１４ａａおよび内周突条１６ｄ
ａを設けることにより、ラビリンスシール１７を構成す
る隙間の断面形状が蛇行状となり、シール効果も向上す
る。外周突条１４ａａおよび内周突条１６ｄａは、各々
弾性部材１４，１６の一部で形成されるため、第１，第
２のシール板１１，１２を軸方向に相互に強く移動させ
ることで、強制時に分離したり組み込んだりすることが
可能である。In the case of this configuration, the outer peripheral ridge 14aa and the inner peripheral ridge 16da are axially engaged with each other, so that the first seal plate 11 and the second seal plate 12 are not assembled to the bearing when not assembled. Separation is prevented. That is, in the basic configuration, the second
Since the radial lip 16b of the seal plate 12 does not slide on the cylindrical portion 11a of the first seal plate 11, the first and second seal plates 11 and 12 are not assembled to each other as they are. Separated. For this reason, the work of assembling to the bearing during transportation and the like becomes complicated, and the number of steps increases. On the other hand, as described above, the outer ridge 14aa and the inner ridge 16d
a so as to engage in the axial direction, so that the first seal plate 11 and the second seal plate 1
2 can be prevented from being separated, and can be handled as one component. Therefore, not only during transportation,
The number of man-hours for assembling the bearing can be reduced, and the assembling becomes simple. In addition, such an outer peripheral ridge 14aa and an inner peripheral ridge 16d
By providing a, the cross-sectional shape of the gap forming the labyrinth seal 17 becomes meandering, and the sealing effect is also improved. Since the outer peripheral ridge 14aa and the inner peripheral ridge 16da are each formed by a part of the elastic members 14, 16, the first and second seal plates 11, 12 are strongly moved in the axial direction with respect to each other. It is possible to separate and incorporate at the time of forcing.
【００２４】なお、図６の実施形態では、第１，第２の
シール板１１，１２の両方に先端覆い部１４ａ，１６ｄ
を設け、これらに外周突条１４ａａおよび内周突条１６
ｄａを設けたが、これら先端覆い部１４ａ，１６ｄはい
ずれか片方のみを設けるようにしても良い。例えば、図
７に示すように、第２のシール板１２の円筒部１２ａの
先端部１２ａａは、露出状態として先端側が内径側に位
置するように屈曲されたものとし、これに軸方向に係合
可能な外周突条１４ａａを第１のシール板１の先端覆い
部１４ａに形成したものであっても良い。この構成の場
合、未組立状態における第１，第２のシール板１１，１
２の分離が防止される。また、これとは逆に、第１のシ
ール板１１の立板部先端を露出状態とし、第２のシール
板１２の円筒部１２ａの先端覆い部１６ｄに、その露出
状態の立板部１１ｂの先端に係合する内周突条１６ｄａ
（図６）を設けても良い。In the embodiment of FIG. 6, both the first and second seal plates 11 and 12 have front end covering portions 14a and 16d.
Are provided, and an outer circumferential ridge 14aa and an inner circumferential ridge 16
Although da is provided, only one of these tip covering portions 14a and 16d may be provided. For example, as shown in FIG. 7, the distal end portion 12aa of the cylindrical portion 12a of the second seal plate 12 is bent so that the distal end side is positioned on the inner diameter side in an exposed state, and is engaged with the axial direction. A possible outer circumferential ridge 14aa may be formed on the front end cover portion 14a of the first seal plate 1. In the case of this configuration, the first and second seal plates 11, 1 in an unassembled state are provided.
2 is prevented. Conversely, the tip of the upright portion of the first seal plate 11 is exposed, and the leading end portion 16d of the cylindrical portion 12a of the second seal plate 12 is covered with the exposed portion of the upright portion 11b. Inner peripheral ridge 16da engaged with the tip
(FIG. 6) may be provided.
【００２５】図８は、この発明のさらに他の実施形態を
示す。この実施形態は、図１に示した実施形態におい
て、弾性部材１６に設けられるラジアルリップ１６ｂと
して、その先端が軸受内側へ延びるように傾斜したラジ
アルリップ１６ｂ1 に加えて、先端が軸受外側へ延びる
ように傾斜したラジアルリップ１６ｂ2 を設けたもので
ある。このように、先端が軸受外側へ延びるラジアルリ
ップ１６ｂ2 を設けた場合、軸受外から軸受内への水の
浸入防止効果が高くなる。先端が軸受内側へ延びるラジ
アルリップ１６ｂ1 は、軸受外へのグリース漏れの防止
機能を果たす。その他の事項は、図１の実施形態と同じ
である。FIG. 8 shows still another embodiment of the present invention. This embodiment is, in the embodiment shown in FIG. 1, as a radial lip 16b provided on the elastic member 16, in addition to the radial lip 16b 1 that the tip is inclined so as to extend to the inner bearing, the tip extends into the bearing outer it is provided with a radial lip 16b 2 which is inclined as. Thus, when providing a radial lip 16b 2 the tip extends into the bearing outer, intrusion prevention effect of water from outside the bearing into the bearing is increased. Tip radial lip 16b extending to the bearing inner 1 serves the function of preventing grease leakage to the outside of the bearing. Other items are the same as those of the embodiment of FIG.
【００２６】図９は、この発明のさらに他の実施形態を
示す。この実施形態は、図８に示した実施形態におい
て、内方部材１の軌道面１ａと幅面との間の外径面１ｂ
を平坦な円筒面としたものである。すなわち、図８の例
における段付部２０を無くしたものである。内方部材１
は内輪からなる。その他の構成は図８の実施形態と同じ
である。このように、内方部材１の外径面１ｂを、段付
部のない平坦面とした場合、シール装置５の全体の断面
は、図８の例に比べて小さくなるが、グリースリップと
なる軸受内側へ延びるラジアルリップ１６ｂ1 の摺接ス
ペースを大きくとれる。そのため、軸受内に設ける軸方
向のスペースをコンパクト化でき、設計の自由度が増
す。軸方向のスペースを同じとすると、軸受スパンを広
くできるため、剛性を高くすることができる。なお、図
１、図４〜図７の各実施形態においても、図９の例と同
様に、内方部材１の軌道面１ａと幅面との間の外径面を
平坦な円筒面としても良い。すなわち、段付部２０を無
くして全体を外径面１９と同径の円筒面としても良い。FIG. 9 shows still another embodiment of the present invention. This embodiment is different from the embodiment shown in FIG. 8 in that the outer diameter surface 1b between the raceway surface 1a and the width surface of the inner member 1 is provided.
Is a flat cylindrical surface. That is, the stepped portion 20 in the example of FIG. 8 is eliminated. Inner member 1
Consists of inner rings. Other configurations are the same as the embodiment of FIG. As described above, when the outer diameter surface 1b of the inner member 1 is a flat surface having no stepped portion, the entire cross section of the sealing device 5 becomes smaller than the example of FIG. It takes a large sliding space of the radial lip 16b 1 extending inner bearing. Therefore, the space in the axial direction provided in the bearing can be made compact, and the degree of freedom in design increases. If the axial space is the same, the bearing span can be widened, so that the rigidity can be increased. In each of the embodiments of FIGS. 1 and 4 to 7, similarly to the example of FIG. 9, the outer diameter surface between the raceway surface 1 a and the width surface of the inner member 1 may be a flat cylindrical surface. . In other words, the stepped portion 20 may be eliminated and the whole may be a cylindrical surface having the same diameter as the outer diameter surface 19.
【００２７】図９の例を除く上記各実施形態（内方部材
１の外径面に段付部２０を形成した各実施形態）では、
図１０に示すように内輪となる内方部材１の各部を一体
の砥石３０により同時研削する。すなわち、内方部材１
の小径端面１ｃ、カウンタボア部１ｄ、軌道面１ａ、外
径面１９、段付部２０を、一体の砥石３０により同時研
削する。砥石３０は、同図に矢印で示すように斜め方向
に押し付け、アンギュラカットを行う。このように同時
研削するのは、内方部材１の各部の同軸度を向上させる
と共に、小径端面１ｃと軌道面１ａとのピッチ寸法Ｐを
精度良く加工するためである。このピッチ寸法Ｐは、軸
受隙間に関係する。In each of the above embodiments except for the example of FIG. 9 (each embodiment in which the stepped portion 20 is formed on the outer diameter surface of the inner member 1),
As shown in FIG. 10, each part of the inner member 1 serving as an inner ring is simultaneously ground by an integrated grindstone 30. That is, the inner member 1
The small-diameter end surface 1c, the counterbore portion 1d, the raceway surface 1a, the outer-diameter surface 19, and the stepped portion 20 are simultaneously ground by an integrated grindstone 30. The grindstone 30 is pressed in an oblique direction as indicated by the arrow in FIG. The simultaneous grinding is performed in order to improve the coaxiality of each portion of the inner member 1 and to accurately process the pitch dimension P between the small-diameter end surface 1c and the raceway surface 1a. This pitch dimension P is related to the bearing clearance.
【００２８】[0028]
【発明の効果】この発明の車輪用軸受は、第２のシール
板が、第１のシール板の立板部に摺接するサイドリップ
と、回転側部材のシール板嵌合部の近傍の外径面に摺接
するラジアルリップとを一体に有するものとしたため、
シール板の嵌合部から浸入する水の軸受内への流入が防
止できて、軸受寿命の向上が図れ、またシール板の抜け
や移動の問題が生じず、かつ磁束密度の確保が容易とな
る。According to the wheel bearing of the present invention, the second seal plate has a side lip slidingly in contact with the upright portion of the first seal plate and an outer diameter near the seal plate fitting portion of the rotating member. Because it has a radial lip that is in sliding contact with the surface,
Water entering from the fitting portion of the seal plate can be prevented from flowing into the bearing, so that the life of the bearing can be improved, and there is no problem of slipping or moving of the seal plate, and it is easy to secure magnetic flux density. .
【図１】この発明の一実施形態にかかる車輪用軸受の部
分断面図である。FIG. 1 is a partial sectional view of a wheel bearing according to an embodiment of the present invention.
【図２】そのエンコーダ格子となる弾性部材の部分正面
図である。FIG. 2 is a partial front view of an elastic member serving as the encoder lattice.
【図３】同車輪用軸受の全体例の断面図である。FIG. 3 is a sectional view of an overall example of the wheel bearing.
【図４】この発明の他の実施形態にかかる車輪用軸受の
部分断面図である。FIG. 4 is a partial cross-sectional view of a wheel bearing according to another embodiment of the present invention.
【図５】この発明のさらに他の実施形態にかかる車輪用
軸受の部分断面図である。FIG. 5 is a partial sectional view of a wheel bearing according to still another embodiment of the present invention.
【図６】この発明のさらに他の実施形態にかかる車輪用
軸受の部分断面図である。FIG. 6 is a partial cross-sectional view of a wheel bearing according to still another embodiment of the present invention.
【図７】この発明のさらに他の実施形態にかかる車輪用
軸受の部分断面図である。FIG. 7 is a partial sectional view of a wheel bearing according to still another embodiment of the present invention.
【図８】この発明のさらに他の実施形態にかかる車輪用
軸受の部分断面図である。FIG. 8 is a partial sectional view of a wheel bearing according to still another embodiment of the present invention.
【図９】この発明のさらに他の実施形態にかかる車輪用
軸受の部分断面図である。FIG. 9 is a partial cross-sectional view of a wheel bearing according to still another embodiment of the present invention.
【図１０】内輪加工方法例の説明図である。FIG. 10 is an explanatory diagram of an example of an inner ring processing method.
【図１１】従来例の断面図である。FIG. 11 is a sectional view of a conventional example.
１…内方部材 ２…外方部材 ３…転動体 ５…シール装置 ６…ハブ輪 １１…第１のシール板 １２…第２のシール板 １１ａ，１２ａ…円筒部 １１ｂ，１２ｂ…立板部 １４…弾性部材 １４ｄ…先端覆い部 １６ａ，１６ｂ…リップ部 １６ｄ…先端覆い部 １８…嵌合部 ２０…段付部 Ｎ，Ｓ…磁極 DESCRIPTION OF SYMBOLS 1 ... Inner member 2 ... Outer member 3 ... Rolling element 5 ... Sealing device 6 ... Hub ring 11 ... First seal plate 12 ... Second seal plate 11a, 12a ... Cylindrical portion 11b, 12b ... Standing plate portion 14 ... Elastic member 14d... Tip covering portions 16a and 16b... Lip portions 16d... Tip covering portions 18.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2F077 AA49 CC02 NN02 NN19 NN24 PP05 QQ01 VV03 3J016 AA02 AA03 BB03 BB04 CA02 CA03 CA06 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F077 AA49 CC02 NN02 NN19 NN24 PP05 QQ01 VV03 3J016 AA02 AA03 BB03 BB04 CA02 CA03 CA06
Claims (6)
の部材間に収容される複数の転動体と、上記内外の部材
間の端部環状空間を密封するシール装置とからなる車輪
用軸受において、 上記シール装置は、上記内方部材と外方部材のうちの互
いに異なる部材に各々取付けられた第１および第２の環
状のシール板を有し、両シール板は、各々円筒部と立板
部とでなる断面Ｌ字状に形成されて互いに対向し、第１
のシール板は内方部材および外方部材のうちの回転側の
部材に嵌合され、立板部は軸受外方側に配されると共
に、この立板部に磁性体粉が混入された弾性部材が加硫
接着されて、この弾性部材は周方向に交互に磁極が形成
され、第２のシール板の円筒部と上記第１のシール板の
立板部の先端とを僅かな径方向隙間をもって対峙させ、
第２のシール板は上記立板部に摺接するサイドリップ
と、上記回転側部材のシール板嵌合部の近傍の外径面に
摺接するラジアルリップとを一体に有するものとしたこ
とを特徴とする車輪用軸受。1. A wheel bearing comprising an inner member and an outer member, a plurality of rolling elements housed between the inner and outer members, and a seal device for sealing an end annular space between the inner and outer members. In the above, the sealing device has first and second annular seal plates respectively attached to different ones of the inner member and the outer member, and both seal plates are respectively formed with a cylindrical portion. A plate portion is formed in an L-shaped cross section and faces each other.
The seal plate is fitted to the rotating member of the inner member and the outer member, and the upright portion is disposed on the outer side of the bearing, and the upright portion is mixed with magnetic powder. The members are vulcanized and bonded, and the elastic members are alternately formed with magnetic poles in the circumferential direction. A slight radial gap is formed between the cylindrical portion of the second seal plate and the tip of the upright portion of the first seal plate. To confront,
The second seal plate integrally has a side lip slidingly contacting the upright plate portion and a radial lip slidingly contacting an outer diameter surface near a seal plate fitting portion of the rotating side member. Bearings for wheels.
転側の部材に第１のシール板の厚み相当の段差をもって
小径となる段付部を設け、この段付部の外径面に第１の
シール板の円筒部を圧入した請求項１に記載の車輪用軸
受。2. A stepped portion having a small diameter with a step corresponding to the thickness of the first seal plate is provided on a rotating side member of the inner member and the outer member, and an outer diameter surface of the stepped portion is provided. The wheel bearing according to claim 1, wherein the cylindrical portion of the first seal plate is press-fitted.
軸受外側へ向かって傾斜させた請求項１または請求項２
に記載の車輪用軸受。3. The radial lip of the second seal plate is inclined toward the outside of the bearing.
A bearing for a wheel according to the above.
径方向の内外２か所に設けた請求項１ないし請求項３の
いずれかに記載の車輪用軸受。4. The side lip of the second seal plate,
The wheel bearing according to any one of claims 1 to 3, wherein the bearing is provided at two radially inner and outer locations.
テンレスにて形成されている請求項１ないし請求項４の
いずれかに記載の車輪用軸受。5. The wheel bearing according to claim 1, wherein the first seal plate is formed of ferritic stainless steel.
記第２のシール板の円筒部との少なくとも一方に、これ
らシール板に一体化された弾性部材の一部で形成される
先端覆い部を設け、この先端覆い部を含む第１のシール
板の立板部先端の最大径部が、第２のシール板の円筒部
先端の最小径部よりも大径でかつ軸受内側に位置するも
のとした請求項１ないし請求項５のいずれかに記載の車
輪用軸受。6. A part of an elastic member integrated with the seal plate on at least one of a tip of an upright portion of the first seal plate and a cylindrical portion of the second seal plate. A tip covering portion is provided, and a maximum diameter portion of the standing plate portion tip of the first seal plate including the tip covering portion is larger in diameter than the minimum diameter portion of the cylindrical portion tip of the second seal plate and inside the bearing. The wheel bearing according to any one of claims 1 to 5, wherein the bearing is located.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000135513A JP2001289254A (en) | 2000-02-01 | 2000-05-09 | Bearing for axle |
| DE10056175A DE10056175A1 (en) | 1999-11-17 | 2000-11-13 | Wheel bearing for automobiles and other motor vehicles comprises a sealing unit which is provided with a peripheral array of alternating magnetic poles |
| US09/709,390 US6637754B1 (en) | 1999-11-17 | 2000-11-13 | Wheel bearing and sealing device therefor |
| US10/607,198 US6979001B2 (en) | 1999-11-17 | 2003-06-27 | Wheel bearing and sealing device therefor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000023815 | 2000-02-01 | ||
| JP2000-23815 | 2000-02-01 | ||
| JP2000135513A JP2001289254A (en) | 2000-02-01 | 2000-05-09 | Bearing for axle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001289254A true JP2001289254A (en) | 2001-10-19 |
Family
ID=26584626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000135513A Pending JP2001289254A (en) | 1999-11-17 | 2000-05-09 | Bearing for axle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001289254A (en) |
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