JP4657227B2

JP4657227B2 - Wheel bearing

Info

Publication number: JP4657227B2
Application number: JP2007025444A
Authority: JP
Inventors: 寿志大槻; 基晴仁木; 晃司亀高; 勝己杉山
Original assignee: NTN Corp
Current assignee: NTN Corp
Priority date: 2007-02-05
Filing date: 2007-02-05
Publication date: 2011-03-23
Anticipated expiration: 2020-02-01
Also published as: JP2007187318A

Description

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。 The present invention relates to a wheel bearing in an automobile or the like, and more particularly to a sealing structure in which an encoder grid for detecting rotation is integrated.

従来、図２１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６−２８１０１８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。 Conventionally, in a wheel bearing in which a seal device 105 is provided between an inner member 101 and an outer member 102 that are in rolling contact with each other via a rolling element 103 as shown in FIG. 21, an encoder grid 106 is integrated with the seal device 105. Some have been proposed (for example, JP-A-6-281018). The sealing device 105 has first and second sealing plates 107 and 108 each having an L-shaped cross section fitted to the inner member 101 and the outer member 102, respectively, and a lip 109 is attached to the second sealing plate 108. It is provided. 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 arranged face-to-face.

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、シールリップの摩耗が生じる。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、エンコーダ格子１０６を構成する弾性部材をシール板１０７の内径面まで延ばし、嵌合部１１１のシール性を向上させることを考えた。しかし、エンコーダ格子１０６を構成する弾性部材は、磁性体粉が混入されたものであり、高価になるうえ、適切なシール性を得ることが難しい。また、シール板１０７の内方部材１０１との嵌合部１１１に厚いゴム層を形成すると、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１０７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 ring are fitted in a press-fitted state, but a small amount of water may enter the bearing from the fitting portion 111. When such water intrusion occurs, rust is generated on the seal plates 107 and 108 and the seal lip is worn. Also, the internal grease deteriorates and the bearing life is reduced.
Therefore, it has been considered to extend the elastic member constituting the encoder lattice 106 to the inner diameter surface of the seal plate 107 to improve the sealing performance of the fitting portion 111. However, the elastic members constituting the encoder lattice 106 are mixed with magnetic powder, which is expensive and difficult to obtain an appropriate sealing property. Further, if a thick rubber layer is formed on the fitting portion 111 of the seal plate 107 with the inner member 101, the fitting force is insufficient, and the seal plate 107 may be detached or moved into the bearing. Even when packing is interposed in the fitting portion 111, problems of disconnection and movement also occur.
Instead of interposing an elastic member, it is possible to improve the adhesion by making the material of the seal plate 107 soft, but since such a material is a non-magnetic material, the magnetic core of the encoder grating 106 and Is not obtained, and the magnetic flux density is insufficient.

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。 Regarding the rust prevention of the seal plate 107, instead of a commonly used magnetic material such as SUS430, which has poor corrosion resistance, magnetic stainless steel having corrosion resistance equivalent to SUS304 (SUS430MA, SUS430 is added with niobium, Ni, etc. to have corrosion resistance. SUS430MA can be obtained in the same manner as SUS430. However, the material is expensive, and even if such a material is used, the ingress of water cannot be prevented, and the bearing life cannot be reduced due to the deterioration of grease.

この発明の目的は、シール板の嵌合部における水の浸入が防止できて、軸受寿命の向上が図れ、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。 The object of the present invention is for a wheel that can prevent water from entering the fitting portion of the seal plate, improve the bearing life, does not cause a problem of removal or movement of the seal plate, and easily secures the magnetic flux density. It is to provide a bearing.

この発明は、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のシール板は上記内方部材および外方部材のうちの回転側の部材である内方部材に嵌合され、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のシール板は上記立板部に摺接するサイドリップと円筒部に摺接するラジアルリップとを一体に有し、この第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、
上記弾性部材から延びた突出片を、上記回転側の部材となる内方部材の端面に肩部が衝合する等速自在継手の前記肩部に弾性接触させ、上記突出片は、上記内方部材に取り付けられる弾性部材のエンコーダ格子となる部分よりも薄肉でこのエンコーダ格子となる部分と一体に形成されたものであり、且つ、上記突出片は、上記内方部材の上記端面と、等速自在継手の肩部との当接面を覆うものであることを特徴とする。
この構成の場合、弾性部材から延びた突出片が、内方部材の端面に肩部が衝合する等速自在継手に弾性接触することで、軸受内への水や塵埃の侵入が防止される。第１のシール板は、弾性部材等を介さずに直接に内方部材に嵌合するため、嵌合力の低下の問題が生じない。 The present invention relates to a wheel bearing comprising an inner member and an outer member, a plurality of rolling elements accommodated between the inner and outer members, and a seal device for sealing an end annular space between the inner and outer members. ,
The seal device includes first and second annular seal plates respectively attached to different members of the inner member and the outer member, and the two seal plates are respectively a cylindrical portion and a standing plate portion. consisting of a L-shaped cross section to be formed to face each other, the first seal plate is fitted to the inner member is a part member of the rotating side of said inner member and the outer member, the standing portion Is disposed on the outer side of the bearing, and an elastic member in which magnetic powder is mixed is vulcanized and bonded to the upright plate portion, and the elastic member is alternately formed with magnetic poles in the circumferential direction. The plate integrally has a side lip that is in sliding contact with the vertical plate portion and a radial lip that is in sliding contact with the cylindrical portion, and the cylindrical portion of the second seal plate and the tip of the vertical plate portion of the first seal plate are connected to each other. Let it face with a slight radial gap,
The protruding piece extending from the elastic member, is elastically on the shoulder portion of the constant velocity universal joint hand shoulder portion is abutting on the end face of the inner side member which is a member of the upper Symbol rotation-side contact, the protruding piece, The elastic member attached to the inner member is thinner than the portion that becomes the encoder lattice of the elastic member, and is integrally formed with the portion that becomes the encoder lattice, and the protruding piece is connected to the end surface of the inner member. characterized referred to is up to cover the contact surface of the shoulder portion of the constant velocity universal joint.
In this configuration, the protruding piece extending from the elastic member is in elastic contact with the constant velocity universal joint whose shoulder is in contact with the end surface of the inner member, thereby preventing water and dust from entering the bearing. . Since the first seal plate is directly fitted to the inner member without using an elastic member or the like, there is no problem of a reduction in fitting force.

上記突出片は、等速自在継手の肩部の外径面ではなく、肩部の側面に弾性接触させる。突出片を等速自在継手の側面に弾性接触させるようにした場合、等速自在継手の外径寸法に制約されずに、弾性部材の標準化が可能となる。 The protruding piece is not a radially outer surface of the shoulder portion of the constant velocity universal joint, Ru is elastically in contact with the side surface of the shoulder. When the protruding piece is elastically brought into contact with the side surface of the constant velocity universal joint, the elastic member can be standardized without being restricted by the outer diameter of the constant velocity universal joint.

上記第２のシール板のラジアルリップは、上記内方部材に摺接するようにしても良い。このように、第２のシール板のラジアルリップを内方部材に摺接させるようにすることで、より一層の密封性の向上が図れる。 The radial lip of the second seal plate may be in sliding contact with the inner member. In this way, the sealing performance can be further improved by bringing the radial lip of the second seal plate into sliding contact with the inner member.

この発明の車輪用軸受は、エンコーダ格子となる弾性部材延びた突出片を、回転側の部材となる内方部材の端面に肩部が衝合する等速自在継手の前記肩部に弾性接触させ、上記突出片は、上記内方部材に取り付けられる弾性部材のエンコーダ格子となる部分よりも薄肉でこのエンコーダ格子となる部分と一体に形成されたものであり、且つ、上記突出片は、上記内方部材の上記端面と、等速自在継手の肩部との当接面を覆うものであるため、シール板の嵌合部における水の浸入が防止できて、軸受寿命の向上が図れ、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いう効果が得られる。
また、上記突出片を等速自在継手の側面に弾性接触させるようにしたため、等速自在継手の外径寸法に制約されずに、弾性部材の標準化が可能となる。 In the wheel bearing according to the present invention, the protruding piece extending from the elastic member serving as the encoder lattice is brought into elastic contact with the shoulder portion of the constant velocity universal joint where the shoulder portion abuts the end surface of the inner member serving as the rotation side member. The projecting piece is thinner than the part that becomes the encoder grid of the elastic member attached to the inner member, and is integrally formed with the part that becomes the encoder grid, and the projecting piece is the inner part. Since it covers the contact surface between the end surface of the side member and the shoulder of the constant velocity universal joint, water can be prevented from entering the fitting portion of the seal plate, and the bearing life can be improved. It does not occur in the missing and movement problems, and Ru effect that facilitates securing of the magnetic flux density is obtained.
In addition, since the protruding piece is in elastic contact with the side surface of the constant velocity universal joint, the elastic member can be standardized without being restricted by the outer diameter of the constant velocity universal joint.

この発明の実施形態の説明の前に、この発明の基礎となる第１の提案例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。 Prior to the description of the embodiments of the present invention, a first proposed example as the basis 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 accommodated 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. The inner member 1 and the outer member 2 have raceway surfaces 1a and 2a of the rolling element 3, and each raceway surface 1a and 2a is formed in a groove shape. The inner member 1 and the outer member 2 are an inner peripheral member and an outer peripheral member that are rotatable with respect to each other via the rolling elements 3, respectively. An assembly member in which the bearing inner ring and the bearing outer ring are combined with another component may be used. Further, the inner member 1 may be a shaft. The rolling element 3 consists of a ball or a roller, and a ball is used in this example.

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 configuration of the wheel bearing. This wheel bearing is a double-row rolling bearing, more specifically, a double-row angular contact ball bearing. The inner ring of the bearing is a hub ring 6 and a separate member fitted to the outer diameter of the end of the hub ring 6. It is comprised with the inner ring | wheel 1A. The raceway surface of each rolling element row is formed on the hub ring 6 and the separate inner ring 1A. The separate inner ring 1A is the inner member 1 in the example of FIG. One end (for example, an outer ring) of the constant velocity universal joint 7 is connected to the hub wheel 6, and a wheel (not shown) is attached to the hub portion 6 a of the hub wheel 6 with a bolt 8. The other end (for example, inner ring) of the constant velocity universal joint 7 is connected to the drive shaft. The outer member 2 includes a bearing outer ring having a flange 2b, and is attached to a housing 10 including a knuckle. The outer member 2 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 portion 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.

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。 As shown in FIGS. 1 and 2, the seal device 5 includes first and second annular seal plates 11 and 12 attached to the inner member 1 and the outer member 2, respectively. The seal plates 11 and 12 are attached to the inner member 1 and the outer member 2 by being fitted in a press-fitted state. Both seal plates 11 and 12 are formed in an L-shaped cross section composed of cylindrical portions 11a and 12a and upright plate portions 11b and 12b, and face each other.
The first seal plate 11 is fitted to the inner member 1 which is a rotating side member of the inner member 1 and the outer member 2, and becomes a slinger. The standing plate portion 11b of the first seal plate 11 is arranged on the bearing outer side, and an elastic member 14 mixed with magnetic powder is vulcanized and bonded. The elastic member 14 serves as an encoder lattice, and magnetic poles N and S (FIG. 2) are alternately formed in the circumferential direction to form a so-called rubber magnet. The magnetic poles N and S are formed to have a predetermined pitch p in the pitch circle PCD. A rotary encoder for detecting wheel rotation speed is configured by arranging the magnetic sensor 15 as shown in FIG. 1 so as to face the elastic member 14 serving as the encoder lattice.

第２のシール板１２は、第１のシール板１１の立板部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のシール板１２に加硫接着された弾性部材１６の一部として設けられている。これらリップ１６ａ〜１６ｃの枚数は任意で良いが、図１の例では、１枚のサイドリップ１６ａと、軸方向の内外に位置する２枚のラジアルリップ１６ｃ，１６ｂとを設けている。この外側のラジアルリップ１６ｂは、例えば、図２０に示すようにサイドリップに代えても良く、また省略しても良い。 The second seal plate 12 integrally includes a side lip 16a that is in sliding contact with the standing plate portion 11b of the first seal plate 11 and radial lips 16b and 16c that are in sliding contact with the cylindrical portion 11a. The lips 16 a to 16 c are provided as a part of the elastic member 16 that is vulcanized and bonded to the second seal plate 12. The number of the lips 16a to 16c may be arbitrary, but in the example of FIG. 1, one side lip 16a and two radial lips 16c and 16b positioned inside and outside in the axial direction are provided. The outer radial lip 16b may be replaced with a side lip as shown in FIG. 20, for example, or may be omitted.

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１７を構成している。 The cylindrical portion 12a of the second seal plate 12 and the tip of the standing plate portion 11b of the first seal plate 11 are opposed to each other with a slight radial gap, and the labyrinth seal 17 is configured by the gap.

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（ＪＩＳ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 ferritic stainless steel plate (JIS standard SUS430), a rust-proof rolled steel plate, or the like. The second seal plate 12 is made of a steel plate, for example, an austenitic stainless steel plate (SUS304 type or the like) that is a non-magnetic material, a rust-proof rolled steel plate, or the like. 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.

第１のシール板１１の内方部材１との嵌合部１８には、立板部１１ｂに接着した弾性部材１４とは異なる材質からなる弾性部材２０を介在させている。この弾性部材２０は、薄膜やリング状ゴム部材など、各種のものが採用できる。弾性部材２０の各種の具体例を説明する。 An elastic member 20 made of a material different from that of the elastic member 14 bonded to the standing plate portion 11b is interposed in the fitting portion 18 of the first seal plate 11 with the inner member 1. Various members such as a thin film and a ring-shaped rubber member can be adopted as the elastic member 20. Various specific examples of the elastic member 20 will be described.

弾性部材２０を薄膜とする場合の例を、製法と共に説明する。一般的には、シール板にゴムを加硫接着する場合、シール板に熱硬化性の接着剤を塗布し、その後、ゴム剤を加硫接着する方法が採られる。しかし、この例のようにエンコーダ格子とするゴム部材１４と、これと異質のパッキングとなるゴム部材２０とを形成する場合は、これら異質のゴム剤を同時に金型内に注入して成形することができない。 An example in which the elastic member 20 is a thin film will be described together with a manufacturing method. Generally, when rubber is vulcanized and bonded to a seal plate, a method of applying a thermosetting adhesive to the seal plate and then vulcanizing and bonding the rubber agent is employed. However, in the case of forming the rubber member 14 as the encoder lattice and the rubber member 20 as the foreign packing as in this example, these different rubber agents are simultaneously injected into the mold and molded. I can't.

そのため、例えば、図４に示すように、シール板１１に磁性ゴムを接着剤２１で加硫接着して弾性部材１４とした後（図４（Ａ））、嵌合部１８のみにスプレー等でゴムのコーティング層を形成することで、弾性部材２０としても良い（Ｂ）。 Therefore, for example, as shown in FIG. 4, after magnetic rubber is vulcanized and bonded to the seal plate 11 with an adhesive 21 to form the elastic member 14 (FIG. 4A), only the fitting portion 18 is sprayed or the like. The elastic member 20 may be formed by forming a rubber coating layer (B).

この薄膜の弾性部材２０は、樹脂塗料の層であっても良い。例えば、シール板１１に、図４の例と同様に、磁性ゴムを接着剤２１で加硫接着して弾性部材１４とした後、嵌合部１８のみにスプレー等で薄膜の樹脂塗料を塗布することで、弾性部材２０としても良い。樹脂塗料には、ポリエチレン系のゴム塗料等が用いられ、塗膜の膜厚は、例えば２０μｍを狙い厚さとして塗布する。 The thin-film elastic member 20 may be a resin paint layer. For example, as in the example of FIG. 4, magnetic rubber is vulcanized and bonded to the seal plate 11 with an adhesive 21 to form the elastic member 14, and then a thin resin coating is applied only to the fitting portion 18 by spraying or the like. Thus, the elastic member 20 may be used. As the resin paint, a polyethylene rubber paint or the like is used, and the film thickness of the coating film is applied with a thickness of, for example, 20 μm.

薄膜の弾性部材２０は、接着剤層であっても良い。この場合も、シール板１１に、図４の例と同様に、磁性ゴムを接着剤２１で加硫接着して弾性部材１４とした後、嵌合部１８のみにスプレー等で薄膜の接着剤を塗布することで、弾性部材２０とする。この接着剤は、防錆能を有するものであって、樹脂性接着剤が好ましく、さらに嫌気性室温硬化型樹脂接着剤であることが好ましい。
このように嵌合部１８に接着剤層からなる弾性部材２０を設けた場合、嵌合部１８の面粗さによって生じる微小隙間を接着剤が埋め、シール板１１の内方部材１１への嵌合力を増大するだけでなく、気密性を向上させる。嫌気性室温硬化型樹脂接着剤は、空気に触れても硬化速度が遅く、その反面、嵌合面等の空気に触れない部分では、室温でも比較的に早く硬化する。したがって、シール板１１と内方部材１との圧入の締代を少なくし、組立性を向上させることができる。
嫌気性室温硬化型樹脂接着剤としては、例えば日本ロックタイト株式会社製のロックタイトリティニングコンパウンド６８０（商品名）や、ロックタイト６０３（商品名）等が使用できる。 The thin elastic member 20 may be an adhesive layer. Also in this case, after the magnetic rubber is vulcanized and bonded to the seal plate 11 with the adhesive 21 to form the elastic member 14 as in the example of FIG. 4, a thin film adhesive is applied only to the fitting portion 18 by spraying or the like. By applying, the elastic member 20 is obtained. This adhesive has rust prevention ability, preferably a resinous adhesive, and more preferably an anaerobic room temperature curable resin adhesive.
Thus, when the elastic member 20 which consists of an adhesive bond layer is provided in the fitting part 18, an adhesive fills the micro gap produced by the surface roughness of the fitting part 18, and the fitting to the inner member 11 of the seal plate 11 is carried out. Not only increases the resultant force, but also improves airtightness. The anaerobic room temperature curable resin adhesive has a slow curing speed even when it is exposed to air. On the other hand, a portion such as a fitting surface that is not exposed to air cures relatively quickly even at room temperature. Therefore, it is possible to reduce the tightening allowance for press-fitting between the seal plate 11 and the inner member 1 and improve the assemblability.
As the anaerobic room temperature curable resin adhesive, for example, Loctite Refining Compound 680 (trade name) manufactured by Nippon Loctite Co., Ltd., Loctite 603 (trade name) or the like can be used.

上記のように第１のシール板１１の嵌合部１８に薄膜状の弾性部材２０を設ける場合に、このシール板１１の嵌合部を成す面の面粗さをＲｍａｘ３．０以下としても良く、０．５〜２．２の範囲とすることが好ましい。
従来、シール板１１が金属板の場合、従来は面粗さがＲｍａｘ３．０よりも大きく、７．５以下の程度とされているが、Ｒｍａｘ３．０以下とすることで、弾性部材２０の付着強度を確保しながら、弾性部材２０の内径の寸法精度の保持が容易となる。 When the thin-film elastic member 20 is provided in the fitting portion 18 of the first seal plate 11 as described above, the surface roughness of the surface forming the fitting portion of the seal plate 11 may be Rmax 3.0 or less. , Preferably in the range of 0.5 to 2.2.
Conventionally, when the seal plate 11 is a metal plate, the surface roughness is conventionally larger than Rmax 3.0 and not more than 7.5, but by setting Rmax 3.0 or less, the elastic member 20 adheres. It is easy to maintain the dimensional accuracy of the inner diameter of the elastic member 20 while ensuring the strength.

なお、上記提案例では、第２のシール板１２は外方部材２に直接に嵌合させたが、例えば図５に示すように、第２のシール板１２と外方部材２との嵌合部２３間にも、弾性部材２４を介在させても良い。この弾性部材２４も、薄膜状のものであっても、リング状ゴム部材であっても良い。弾性部材２４を薄膜状とする場合に、内方部材１の嵌合部１８の弾性部材２０と同じ材質のものが使用でき、ゴムをコーティング層、塗料の塗布層、接着剤層のいずれとしても良い。 In the above proposed example, the second seal plate 12 is directly fitted to the outer member 2. However, for example, as shown in FIG. 5, the second seal plate 12 is fitted to the outer member 2. The elastic member 24 may be interposed between the portions 23. The elastic member 24 may also be a thin film or a ring-shaped rubber member. When the elastic member 24 is formed into a thin film, the same material as that of the elastic member 20 of the fitting portion 18 of the inner member 1 can be used, and rubber can be used as a coating layer, a coating application layer, or an adhesive layer. good.

図６に示す提案例は、図１の例において、薄膜状の弾性部材２０を設ける代わりに、内方部材１における第１のシール板１１の嵌合する外径面部に環状溝２５を形成し、この環状溝２５内にリング状ゴム部材からなる弾性部材２０Ａを装着したものである。このように設けた弾性部材２０Ａの外径が、内方部材１の外径よりも僅かに突出するように設定し、シール板１１の円筒部１１ａを圧入することにより、嵌合部１８からの泥水等の浸入を、この弾性部材２０Ａで阻止することができる。
このリング状ゴム部材の弾性部材２０Ａとしては、Ｏリング等が使用でき、この他にリップ付きの軸シール等を用いることができる。 In the proposed example shown in FIG. 6, in the example of FIG. 1, instead of providing the thin-film elastic member 20, an annular groove 25 is formed on the outer diameter surface portion of the inner member 1 where the first seal plate 11 is fitted. In this annular groove 25, an elastic member 20A made of a ring-shaped rubber member is mounted. The outer diameter of the elastic member 20A provided in this way is set so as to protrude slightly from the outer diameter of the inner member 1, and the cylindrical portion 11a of the seal plate 11 is press-fitted to thereby prevent the fitting member 18 from Intrusion of muddy water or the like can be prevented by the elastic member 20A.
As the elastic member 20A of the ring-shaped rubber member, an O-ring or the like can be used. In addition, a shaft seal with a lip can be used.

図７に示す提案例は、図１の例において、薄膜状の弾性部材２０を設ける代わりに、次の構成を設けたものである。第１のシール板１１の円筒部１１ａと立板部１１ｂとのつなぎ部に、立板部１１ｂから内径側へ延びて折返された重合部１１ｃを設ける。重合部１１ｃは、シール板１１のプレス加工で形成する。内方部材１の端部外径に段差をもって小径となる段付部２６を設ける。第１のシール板１１は、円筒部１１ａを内方部材１に嵌合させ、段付部２６内に重合部１１ｃを配置する。段付部２６の側壁面と重合部１１ｃとの間に、リング状のゴム部材からなる弾性部材２０Ｂを介在させる。弾性部材２０ＢにはＯリングまたはリップ付きの軸シール等を用いることができる。
このように重合部１１ｃと段付部２６を設けて嵌め合うことで、水の浸入経路が蛇行状になり、軸受内部への水の浸入が生じ難くなる。また、重合部１１ｃと段付部２６の側面の間にリング状のゴム部材からなる弾性部材２０Ｂが介在するため、密封性が確保される。さらに、重合部１１ｃを設けることにより、第１のシール板１１自体の剛性が上がると共に、プレス工程において、素材の弾性域（スプリングバック）を極力残さないようにでき、後工程の熱処理や弾性部材１４のゴム加硫の際の高温化によっても、変形を抑えることができる。そのため、第１のシール板１１の形状精度が高められ、嵌合による密封性が一層向上する。 The proposed example shown in FIG. 7 provides the following configuration instead of providing the thin-film elastic member 20 in the example of FIG. A overlapping portion 11c that extends from the standing plate portion 11b to the inner diameter side and is folded back is provided at a connecting portion between the cylindrical portion 11a and the standing plate portion 11b of the first seal plate 11. The overlapping portion 11 c is formed by pressing the seal plate 11. A stepped portion 26 having a small diameter with a step is provided on the outer diameter of the end of the inner member 1. The first seal plate 11 has the cylindrical portion 11 a fitted to the inner member 1 and the overlapping portion 11 c is disposed in the stepped portion 26. An elastic member 20B made of a ring-shaped rubber member is interposed between the side wall surface of the stepped portion 26 and the overlapping portion 11c. An O-ring or a shaft seal with a lip can be used for the elastic member 20B.
By providing and fitting the overlapping portion 11c and the stepped portion 26 in this manner, the water intrusion path becomes meandering and water intrusion into the bearing is less likely to occur. Further, since the elastic member 20B made of a ring-shaped rubber member is interposed between the side surfaces of the overlapping portion 11c and the stepped portion 26, the sealing performance is ensured. Furthermore, by providing the overlapping portion 11c, the rigidity of the first seal plate 11 itself can be increased, and the elastic region (spring back) of the material can be kept as little as possible in the pressing process. The deformation can also be suppressed by increasing the temperature during rubber vulcanization of No. 14. Therefore, the shape accuracy of the first seal plate 11 is improved, and the sealing performance by fitting is further improved.

図８に示す提案例は、図１の例において、薄膜状の弾性部材２０を設ける代わりに、次の構成を設けたものである。内方部材１の端部外径に段差をもって小径となる段付部２７を設ける。この段付部２７の外径面に第１のシール板１１の円筒部１１ａを嵌合させる。この円筒部１１ａの先端と段付部２７の側壁面および底壁面との間に、リング状のゴム部材からなる弾性部材２０Ｃを介在させる。リング状のゴム部材からなる弾性部材２０Ｃとしては、Ｏリング等が用いられる。段付部２７の半径方向の深さは、円筒部１１ａの板厚と同程度か、それ以下とされている。円筒部１１ａの先端面１１ａａは、内径側が小径となる傾斜面とされている。
このように、リング状のゴム部材からなる弾性部材２０Ｃを段付部２７の壁面に弾性接触させることにより、嵌合部１８から水や塵埃等が侵入しても、この弾性部材２０Ｃによって軸受内部への侵入を阻止できる。円筒部先端面１１ａａを傾斜面とすれば、シール板１１の圧入が容易になると共に、弾性部材２０Ｃを内径方向に弾性変形させられるため、外れ防止や、パッキングとしての効果を向上させることができる。また、シール板１１の円筒部１１ａの大部分が内方部材１に直接に嵌合するため、高い嵌合力が得られ、シール板１１の抜けや移動の防止性に優れる。 The proposed example shown in FIG. 8 provides the following configuration instead of providing the thin-film elastic member 20 in the example of FIG. A stepped portion 27 having a small diameter with a step is provided on the outer diameter of the end of the inner member 1. The cylindrical portion 11 a of the first seal plate 11 is fitted to the outer diameter surface of the stepped portion 27. An elastic member 20C made of a ring-shaped rubber member is interposed between the tip of the cylindrical portion 11a and the side wall surface and bottom wall surface of the stepped portion 27. An O-ring or the like is used as the elastic member 20C made of a ring-shaped rubber member. The depth of the stepped portion 27 in the radial direction is approximately the same as or less than the plate thickness of the cylindrical portion 11a. The front end surface 11aa of the cylindrical portion 11a is an inclined surface having a smaller inner diameter side.
Thus, even if water, dust or the like enters from the fitting portion 18 by elastically contacting the elastic member 20C made of a ring-shaped rubber member to the wall surface of the stepped portion 27, the elastic member 20C can Can be prevented from entering. If the cylindrical portion front end surface 11aa is an inclined surface, the sealing plate 11 can be easily pressed and the elastic member 20C can be elastically deformed in the inner diameter direction. . Further, since most of the cylindrical portion 11a of the seal plate 11 is directly fitted to the inner member 1, a high fitting force can be obtained, and the seal plate 11 can be prevented from being detached or moved.

図９，図１０に示す提案例は、図１の例において、次の構成を追加したものである。すなわち、第１のシール板１１の円筒部１１ａに、内径側へ突出する係止部１１ｄを形成し、この係止部１１ｄを、内方部材１の外径面に設けた環状溝２８に係止させたものである。係止部１１ｄは、円筒部１１ａの先端に設けたた折曲片からなり、環状溝２８は、溝底面の片方が軌道面１ａに続く段付部からなる。
このように環状溝２８に係止部１１ｄを係合させることで、第１のシール板１１の軸方向の移動が阻止できる。第１のシール板１１の組立に際しては、図１０に鎖線で示すように、円筒部１１ａの先端を弾性に抗して外径側へ撓ませた状態でシール板１１を圧入する。係止部１１ｄが環状溝２８に達すると、係止部１１ｄは円筒部１１ａの弾性復元力で環状溝２８に係合する。 The proposed example shown in FIGS. 9 and 10 is obtained by adding the following configuration to the example of FIG. That is, a locking portion 11 d that protrudes toward the inner diameter side is formed in the cylindrical portion 11 a of the first seal plate 11, and this locking portion 11 d is engaged with the annular groove 28 provided on the outer diameter surface of the inner member 1. It has been stopped. 11 d of latching parts consist of the bending piece provided in the front-end | tip of the cylindrical part 11a, and the annular groove 28 consists of a stepped part where one side of a groove bottom continues to the track surface 1a.
Thus, by engaging the locking portion 11d with the annular groove 28, the axial movement of the first seal plate 11 can be prevented. When assembling the first seal plate 11, as shown by a chain line in FIG. 10, the seal plate 11 is press-fitted in a state where the tip of the cylindrical portion 11a is bent against the outer diameter against elasticity. When the locking portion 11d reaches the annular groove 28, the locking portion 11d is engaged with the annular groove 28 by the elastic restoring force of the cylindrical portion 11a.

図１１，図１２に示す提案例は、図１の例において、次の構成を追加したものである。すなわち、第１のシール板１１の円筒部１１ａに、内径側へ突出する係止部１１ｅを形成し、この係止部１１ｅを、内方部材１の外径面に設けた環状溝２９に係止させたものである。係止部１１ｅは、第１のシール板１１の円筒部１１ａの略中央に形成した周方向に点在する複数の凸部である。環状溝２９は、内方部材１の外径面における軌道面１ａと幅面との中間に形成されており、Ｖ溝等の溝断面形状とされている。この凸部からなる係止部１１ｅは、少なくとも円周方向の３箇所にあれば良い。また、この凸部からなる係止部１１ｅは、図示のような円形であっても、三角形状であっても良く、さらに切り起こし片であっても良い。
このように複数の係止部１１ｅを環状溝２９に係合させるようにした場合も、第１のシール板１１の軸方向の移動が阻止できる。 The proposed example shown in FIGS. 11 and 12 is obtained by adding the following configuration to the example of FIG. That is, a locking portion 11 e that protrudes toward the inner diameter side is formed in the cylindrical portion 11 a of the first seal plate 11, and this locking portion 11 e is engaged with an annular groove 29 provided on the outer diameter surface of the inner member 1. It has been stopped. The locking portions 11 e are a plurality of convex portions scattered in the circumferential direction formed at the approximate center of the cylindrical portion 11 a of the first seal plate 11. The annular groove 29 is formed in the middle of the raceway surface 1a and the width surface on the outer diameter surface of the inner member 1, and has a groove cross-sectional shape such as a V groove. The engaging portions 11e made of this convex portion may be at least at three locations in the circumferential direction. Further, the engaging portion 11e made of the convex portion may be a circular shape as shown in the figure, a triangular shape, or a cut and raised piece.
As described above, even when the plurality of locking portions 11e are engaged with the annular groove 29, the movement of the first seal plate 11 in the axial direction can be prevented.

第１のシール板１１に、係止部１１ｅとして複数の点在した凸部を設ける代わりに、図１３に示すように円筒部１１ａの略中央に円周方向に沿って形成した突条からなる係止部１１ｆを設け、この係止部１１ｆを内方部材１の環状溝２９に係合させても良い。
なお、図９〜図１３の例のように係止部１１ｄ，１１ｅ，１１ｆを設ける構成とする場合に、弾性部材２０は、図１の例などで前述した各種の薄膜状のものであっても、またリング状のゴム部材であっても良い。 Instead of providing the first seal plate 11 with a plurality of interspersed convex portions as the engaging portions 11e, as shown in FIG. 13, the first seal plate 11 is composed of a ridge formed along the circumferential direction substantially at the center of the cylindrical portion 11a. A locking portion 11 f may be provided, and the locking portion 11 f may be engaged with the annular groove 29 of the inner member 1.
In addition, when it is set as the structure which provides the latching | locking part 11d, 11e, and 11f like the example of FIGS. 9-13, the elastic member 20 is a thing of various thin film forms mentioned above in the example of FIG. Alternatively, a ring-shaped rubber member may be used.

図１４および図１５にさらに他の提案例を示す。
図１４に示す提案例は、以下に説明した事項を除いて、上記第１の提案例と同じである。この提案例は、図１に示す提案例において、第１のシール板１１に弾性部材２０を設ける代わりに、エンコーダ格子となる弾性部材１４から延びた突出片３０を、内方部材１の端面に衝合する連結部材３１に弾性接触させたものである。突出片３０の弾性変形前の自然状態の形状は、同図に鎖線で示されている。
連結部材３１は、例えば、図３の例における内方部材１の端面に肩部７ａが衝合する等速自在継手７であり、この等速自在継手７の肩部７ａの外径面に突出片３０（図１４）が弾性接触している。等速自在継手７は、図１４の例では内方部材１の内径面に一部が直接に嵌合するものとしてあるが、内方部材１が図３の例のようにハブ輪６に嵌合した別体内輪１Ａである場合は、等速自在継手７はハブ輪６の内径面に嵌合するものとされる。 14 and 15 show still another proposal example.
The proposed example shown in FIG. 14 is the same as the first proposed example except for the items described below. In this proposal example , instead of providing the elastic member 20 on the first seal plate 11 in the proposal example shown in FIG. 1, the protruding piece 30 extending from the elastic member 14 serving as the encoder lattice is provided on the end surface of the inner member 1. It is made to elastically contact the connecting member 31 to be abutted. The shape of the protruding piece 30 in the natural state before elastic deformation is indicated by a chain line in FIG.
The connecting member 31 is, for example, the constant velocity universal joint 7 in which the shoulder portion 7a abuts on the end surface of the inner member 1 in the example of FIG. 3, and protrudes from the outer diameter surface of the shoulder portion 7a of the constant velocity universal joint 7. The piece 30 (FIG. 14) is in elastic contact. In the example of FIG. 14, the constant velocity universal joint 7 is partly fitted directly into the inner diameter surface of the inner member 1, but the inner member 1 is fitted to the hub wheel 6 as in the example of FIG. In the case of the combined separate inner ring 1 </ b> A, the constant velocity universal joint 7 is fitted to the inner diameter surface of the hub ring 6.

弾性部材１４から延びた突出片３０は、弾性部材１４の内径部の全周から内径側へかつ軸方向の斜め外側へ延びるものであり、弾性部材１４のエンコーダ格子となる部分よりも薄肉に形成されている。突出片３０の材質は、弾性部材１４の材質と異なる材質であっても、同じ材質であっても良いが、同じ材質とすると、シール板１１への加硫接着が同時にでき、コスト的に有利になる。 The projecting piece 30 extending from the elastic member 14 extends from the entire circumference of the inner diameter portion of the elastic member 14 toward the inner diameter side and obliquely outward in the axial direction, and is formed thinner than the portion of the elastic member 14 that becomes the encoder grid. Has been. The material of the projecting piece 30 may be different from the material of the elastic member 14 or may be the same material. However, if the same material is used, vulcanization adhesion to the seal plate 11 can be performed simultaneously, which is advantageous in terms of cost. become.

弾性部材１４は、第１のシール板１１の立板部１１ｂの先面から先端部内面までを覆う先端覆い部１４ａを有するものとされているが、この先端覆い部１４ａは、省いても良い。
第２のシール板１２に一体化させた弾性部材１６は、円筒部１２ａの内径面から先端部外径面まで覆う先端覆い部１６ｄを有するものとしてあるが、この先端覆い部１６ｄも、省いても良い。
同図の例では、第１のシール板１１に設けた弾性部材１４の先端覆い部１４ａと、第２のシール板１２に設けた弾性部材１６の先端覆い部１６ｄとの間に形成された径方向隙間でラビリンスシール１７が構成される。
なお、同図の例では、第２のシール板１２の立板部１２ｂは、Ｓ字状の屈曲板状としてあるが、この立板部１２ｂは、図１の例と同様に平板状のものであっても良い。 The elastic member 14 has a tip cover portion 14a that covers from the front surface of the standing plate portion 11b of the first seal plate 11 to the tip portion inner surface, but the tip cover portion 14a may be omitted. .
The elastic member 16 integrated with the second seal plate 12 has a tip cover portion 16d that covers from the inner diameter surface of the cylindrical portion 12a to the outer diameter surface of the tip portion, but this tip cover portion 16d is also omitted. Also good.
In the example of the figure, the diameter formed between the tip cover portion 14 a of the elastic member 14 provided on the first seal plate 11 and the tip cover portion 16 d of the elastic member 16 provided on the second seal plate 12. A labyrinth seal 17 is formed by the direction gap.
In the example shown in the figure, the standing plate portion 12b of the second seal plate 12 has an S-shaped bent plate shape, but the standing plate portion 12b has a flat plate shape as in the example shown in FIG. It may be.

この提案例の場合、弾性部材１４から延びた突出片３０が連結部材３１の外径面に弾性的に接することで、軸受内への水や塵埃の侵入が防止される。第１のシール板１１は、内方部材１に直接に嵌合するため、嵌合力が確保される。
なお、図１４の例は、内方部材１に連結される連結部材３１の肩部外径が大きい場合の例であり、連結部材３１の肩部外径が小さい場合は、図１５に示すように、突出片３０を長く形成したものを用いる。 In the case of this proposed example , the protruding piece 30 extending from the elastic member 14 is in elastic contact with the outer diameter surface of the connecting member 31, thereby preventing water and dust from entering the bearing. Since the first seal plate 11 is directly fitted to the inner member 1, a fitting force is ensured.
14 is an example when the outer diameter of the shoulder portion of the connecting member 31 connected to the inner member 1 is large, and when the outer diameter of the shoulder portion of the connecting member 31 is small, as shown in FIG. In addition, a long projecting piece 30 is used.

図１６は、この発明の実施形態を示す。この実施形態は、内方部材１の端部外径に段差をもって小径となる段付部３２を設け、弾性部材１４から延びる突出片３０が、この段差部３２内に入って連結部材３１の側面に弾性的に接するものとしてある。突出片３０は、先端部に沿って接触側の側面に突条３０ａが形成され、この突条３０ａで連結部材３１の肩部側面に接している。
この構成の場合、突出片３０が連結部材３１の側面に接するため、連結部材３１の肩部外径面の寸法の違いに影響されずに、突出片３０を含めて、シール装置５の標準化が可能になる。
図１６の実施形態における上記した事項の他の事項は、図１４の提案例と同じである。
FIG. 16 shows an embodiment of the present invention. In this embodiment, a stepped portion 32 having a small step with a step is provided on the outer diameter of the end portion of the inner member 1, and the protruding piece 30 extending from the elastic member 14 enters the stepped portion 32 and the side surface of the connecting member 31. It is supposed to be in contact with the elastically. The protruding piece 30 has a protrusion 30a formed on the side surface on the contact side along the tip, and is in contact with the shoulder side surface of the connecting member 31 by the protrusion 30a.
In the case of this configuration, since the protruding piece 30 contacts the side surface of the connecting member 31, the standardization of the sealing device 5 including the protruding piece 30 can be performed without being affected by the difference in the size of the shoulder outer diameter surface of the connecting member 31. It becomes possible.
Other matters described above in the embodiment of FIG. 16 are the same as the proposed example of FIG.

図１７は、この発明の他の実施形態を示す。同図に示す実施形態は、内方部材１の端部外径に段差をもって小径となる嵌合用段付部３３を設け、この嵌合用段付部３３の外径面に第１のシール板１１の円筒部１１ａが嵌合するものとしてある。円筒部１１ａは、軸方向長さが板厚よりも若干長い程度の短いものとされている。第１のシール板１１の立板部１１ｂは嵌合用段付部３３の側面に接する。第２のシール板１２の各ラジアルリップ１６ｂ，１６ｃは、内方部材１の外径面に接する。エンコーダ格子となる弾性部材１４から延びた突出片３０は、嵌合用段付部３３内で、連結部材３１の肩部の側面に弾性的に接する。この場合、突出片３０の厚さは、自然状態では、同図に鎖線で示すように、立板部１１ｂと連結部材３１の肩部側面との隙間よりも厚いものとされ、組立状態では連結部材３１の肩部側面で圧縮される。
この構成の場合、第２のシール板１２のラジアルリップ１６ｂ，１６ｃが内方部材１に直接に接することで、密封性が高められる。また、突出片３０が押し潰し状態となって連結部材３１の肩部側面に接するため、より一層密封性が向上する。このように嵌合用段付部３３を設ける場合、第１のシール板１１は、Ｌ字状でなく円板状に形成し、その内径孔を嵌合用段付部３３に圧入させることも可能であるが、打ち抜いたままでは精度や結合力が不足し、立板部１１ｂの直角度や弾性部材１４によるエンコーダ格子の芯が合い難い。しかし、短い円筒部１１ａを設けることで、結合力の確保、芯合わせの高精度化が得られる。
図１７の実施形態における上記した事項の他の事項は、図１４の提案例と同じである。
FIG. 17 shows another embodiment of the present invention. In the embodiment shown in the figure, a fitting stepped portion 33 having a small step is provided on the outer diameter of the end portion of the inner member 1, and the first seal plate 11 is provided on the outer diameter surface of the fitting stepped portion 33. The cylindrical portion 11a is fitted. The cylindrical portion 11a is a short one whose axial length is slightly longer than the plate thickness. The standing plate portion 11 b of the first seal plate 11 is in contact with the side surface of the fitting stepped portion 33. The radial lips 16 b and 16 c of the second seal plate 12 are in contact with the outer diameter surface of the inner member 1. The protruding piece 30 extending from the elastic member 14 serving as an encoder lattice is in elastic contact with the side surface of the shoulder portion of the connecting member 31 in the fitting stepped portion 33. In this case, the thickness of the protruding piece 30 is, in the natural state, thicker than the gap between the upright plate portion 11b and the shoulder side surface of the connecting member 31, as shown by the chain line in FIG. It is compressed on the shoulder side surface of the member 31.
In the case of this configuration, the radial lips 16b and 16c of the second seal plate 12 are in direct contact with the inner member 1, thereby improving the sealing performance. Moreover, since the protruding piece 30 is in a crushed state and contacts the shoulder side surface of the connecting member 31, the sealing performance is further improved. When the fitting stepped portion 33 is provided in this way, the first seal plate 11 can be formed in a disc shape instead of an L shape, and its inner diameter hole can be press-fitted into the fitting stepped portion 33. However, if punched, accuracy and coupling force are insufficient, and the perpendicularity of the upright plate portion 11b and the encoder lattice core by the elastic member 14 are difficult to align. However, by providing the short cylindrical portion 11a, it is possible to secure the coupling force and to increase the accuracy of centering.
Other matters described above in the embodiment of FIG. 17 are the same as the proposed example of FIG.

図１８は参考提案例を示す。この提案例は、弾性部材１４から延びた突出片３０を、内方部材１の端面に衝合する連結部材３５に弾性接触させたものであって、連結部材３５が、ハブ輪６の端部に嵌合した別体内輪１Ａの端部を加締結合したハブ輪６の加締部である場合を示す。別体内輪１Ａは内方部材１となるものであり、ハブ輪６および別体内輪１Ａは、例えば図３の例のように形成されたものである。図３の例では、別体内輪１Ａは、単にハブ輪６に嵌合させたものとしてあるが、図１８の例では、ハブ輪６から軸方向に延びる円筒状の加締用突部を形成し、別体内輪１Ａを嵌合した後に、その加締用突部を外径側へフランジ状に加締ることで、別体内輪１Ａを止め付けている。このフランジ状となった加締用突部が連結部材３５となる。突出片３０は、この加締用突部からなる連結部材３５の外径面に弾性的に接するものとされる。
この構成の場合、加締用突部からなる連結部材３５を利用し、突出片３０を大きなものとすることなく、突出片３０の弾性接触による密封性の確保が得られる。
図１８の提案例における上記した事項の他の事項は、図１４の実施形態と同じである。 FIG. 18 shows a reference proposal example. In this proposed example, the protruding piece 30 extending from the elastic member 14 is brought into elastic contact with a connecting member 35 that abuts the end surface of the inner member 1, and the connecting member 35 is an end portion of the hub wheel 6. The case where it is the caulking portion of the hub ring 6 in which the end portion of the separate inner ring 1A fitted to the caulking is coupled. The separate inner ring 1A serves as the inner member 1, and the hub ring 6 and the separate inner ring 1A are formed, for example, as in the example of FIG. In the example of FIG. 3, the separate inner ring 1 </ b> A is simply fitted to the hub ring 6, but in the example of FIG. 18, a cylindrical caulking protrusion extending in the axial direction from the hub ring 6 is formed. Then, after fitting the separate inner ring 1A, the separate inner ring 1A is fastened by crimping the caulking protrusion to the outer diameter side in a flange shape. The caulking projection that is in the flange shape becomes the connecting member 35. The protruding piece 30 is elastically in contact with the outer diameter surface of the connecting member 35 including the caulking protrusion.
In the case of this configuration, it is possible to ensure sealing performance by elastic contact of the protruding piece 30 without using the connecting member 35 formed of the caulking protrusion and making the protruding piece 30 large.
Other matters described above in the proposal example in FIG. 18 are the same as those in the embodiment in FIG.

図１８の提案例において、突出片３０を連結部材３５の外径面に接触させる代わりに、図１９に示すように連結部材３５の加締部先端に段付部３６を設け、この段付部３６の側面に突出片３０が弾性的に接するようにしても良い。 In the proposed example of FIG. 18, instead of bringing the protruding piece 30 into contact with the outer diameter surface of the connecting member 35, a stepped portion 36 is provided at the distal end of the crimping portion of the connecting member 35 as shown in FIG. The protruding piece 30 may be elastically in contact with the side surface of 36.

第１の提案例にかかる車輪用軸受の部分断面図である。It is a fragmentary sectional view of the bearing for wheels concerning the 1st proposal example. 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。It is a partial front view of the elastic member used as the encoder lattice. 同車輪用軸受の全体例の断面図である。It is sectional drawing of the whole example of the bearing for the wheels. その第１のシール板の製造工程例の説明図である。It is explanatory drawing of the example of a manufacturing process of the 1st seal board. 他の提案例にかかる車輪用軸受の部分断面図である。It is a fragmentary sectional view of the wheel bearing concerning other proposal examples. さらに他の提案例にかかる車輪用軸受の部分断面図である。It is a fragmentary sectional view of the bearing for wheels concerning other examples of a proposal. さらに他の提案例にかかる車輪用軸受の部分断面図である。It is a fragmentary sectional view of the bearing for wheels concerning other examples of a proposal. さらに他の提案例にかかる車輪用軸受の部分断面図である。It is a fragmentary sectional view of the bearing for wheels concerning other examples of a proposal. さらに他の提案例にかかる車輪用軸受の部分断面図である。It is a fragmentary sectional view of the bearing for wheels concerning other examples of a proposal. その第１のシール板の組立方法の説明図である。It is explanatory drawing of the assembly method of the 1st seal board. さらに他の提案例にかかる車輪用軸受の部分断面図である。It is a fragmentary sectional view of the bearing for wheels concerning other examples of a proposal. その第１のシール板の部分斜視図である。It is a fragmentary perspective view of the 1st seal board. その第１のシール板の変形例の部分斜視図である。It is a fragmentary perspective view of the modification of the 1st seal board. さらに他の提案例にかかる車輪用軸受の部分断面図である。It is a fragmentary sectional view of the bearing for wheels concerning other examples of a proposal . さらに他の提案例にかかる車輪用軸受の部分断面図である。It is a fragmentary sectional view of the bearing for wheels concerning other examples of a proposal . 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。It is a fragmentary sectional view of the bearing for wheels concerning one embodiment of this invention. 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。It is a fragmentary sectional view of the wheel bearing concerning other embodiments of this invention. さらに他の提案例にかかる車輪用軸受の部分断面図である。It is a fragmentary sectional view of the bearing for wheels concerning other examples of a proposal. さらに他の提案例にかかる車輪用軸受の部分断面図である。It is a fragmentary sectional view of the bearing for wheels concerning other examples of a proposal. さらに他の提案例にかかる車輪用軸受におけるシール装置の部分断面図である。It is a fragmentary sectional view of the seal device in the bearing for wheels concerning other examples of a proposal. 従来例の断面図である。It is sectional drawing of a prior art example.

Explanation of symbols

１…内方部材
２…外方部材
３…転動体
５…シール装置
６…ハブ輪
７…等速自在継手
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
１１ｃ…重合部
１１ｄ，１１ｅ，１１ｆ…係止部
１４…弾性部材
１６ａ〜１６ｃ…リップ部
１８…嵌合部
２０，２０Ａ，２０Ｂ，２０Ｃ…弾性部材
２６…段付部
２９…環状溝
３０…突出片
３１…連結部材（等速自在継手）
３２，３３…段付部
Ｎ，Ｓ…磁極 DESCRIPTION OF SYMBOLS 1 ... Inner member 2 ... Outer member 3 ... Rolling body 5 ... Sealing device 6 ... Hub wheel 7 ... Constant velocity universal joint 11 ... 1st seal plate 12 ... 2nd seal plate 11a, 12a ... Cylindrical part 11b, 12b ... Standing plate part 11c ... Superposition part 11d, 11e, 11f ... Locking part 14 ... Elastic members 16a-16c ... Lip part 18 ... Fitting parts 20, 20A, 20B, 20C ... Elastic member 26 ... Stepped part 29 ... Annular groove 30 ... protruding piece 31 ... connecting member (constant velocity universal joint)
32, 33 ... Stepped portion N, S ... Magnetic pole

Claims

In a wheel bearing comprising an inner member and an outer member, a plurality of rolling elements accommodated between the inner and outer members, and a seal device that seals the end annular space between the inner and outer members,
The seal device includes first and second annular seal plates respectively attached to different members of the inner member and the outer member, and the two seal plates are respectively a cylindrical portion and a standing plate portion. The first seal plate is fitted to an inner member that is a rotating member of the inner member and the outer member, and the upright plate portion is An elastic member arranged on the outer side of the bearing and mixed with magnetic powder in the standing plate portion is vulcanized and bonded, and this elastic member has magnetic poles alternately formed in the circumferential direction. Has a side lip that is in sliding contact with the standing plate portion and a radial lip that is in sliding contact with the cylindrical portion, and the cylindrical portion of the second sealing plate and the tip of the standing plate portion of the first sealing plate are slightly connected. With a large radial gap,
The protruding piece extending from the elastic member is brought into elastic contact with the shoulder portion of the constant velocity universal joint whose shoulder abuts against the end surface of the inner member serving as the rotation side member, and the protruding piece is The elastic member attached to the member is thinner than the part that becomes the encoder grid of the elastic member and is integrally formed with the part that becomes the encoder grid, and the protruding piece is formed on the side surface of the shoulder of the constant velocity universal joint. elastic contact, and the end face of the upper Symbol inner member, a wheel bearing, characterized in that those cover the contact surface of the shoulder portion of the constant velocity universal joint.

The wheel bearing according to claim 1, wherein a radial lip of the second seal plate is in sliding contact with the inward member.