JP6765186B2

JP6765186B2 - Sealing device

Info

Publication number: JP6765186B2
Application number: JP2015239573A
Authority: JP
Inventors: 愛塩塚
Original assignee: Uchiyama Manufacturing Corp
Current assignee: Uchiyama Manufacturing Corp
Priority date: 2015-12-08
Filing date: 2015-12-08
Publication date: 2020-10-07
Anticipated expiration: 2035-12-08
Also published as: JP2017106514A

Description

本発明は、例えば、自動車の車輪を支持する軸受装置に適用される密封装置に関し、さらに詳しくは、内輪と、該内輪に同軸回転可能に支持される外輪とを有する軸受装置の前記内輪及び外輪の間を密封する密封装置に関する。 The present invention relates to, for example, a sealing device applied to a bearing device that supports wheels of an automobile. More specifically, the inner ring and the outer ring of a bearing device having an inner ring and an outer ring that is coaxially rotatably supported by the inner ring. It relates to a sealing device that seals between.

前記のような自動車用の軸受装置における従動輪用の軸受装置として、固定側の内輪に外輪が軸回転可能に支持されるいわゆる外輪回転の軸受装置が用いられることがある。このような外輪回転の軸受装置には、エンコーダが取付けられ、車体側（固定側）に設置されたセンサによって従動輪の回転を検出して、アンチロックブレーキシステムやトラクションコントロールシステムが構成されることがある（例えば、特許文献１〜３参照）。また、軸受装置内への異物の侵入や、軸受装置内に充填される潤滑剤（グリース等）の外部漏出を防止するため、軸受装置における内輪と外輪との端部間に密封装置が装着される。そして、特許文献１〜３には、支持部材を含むエンコーダが密封装置の一部をなすように構成された例が示されている。さらに、特許文献１〜３におけるエンコーダを用いた車輪の回転検出機構としては、エンコーダの被検出面とセンサの検出面とが径方向に対峙するラジアルタイプと軸方向に対峙するアキシャルタイプとが開示されている。このようなラジアルタイプ及びアキシャルタイプの回転検出機構は、軸受装置の仕様及びその周辺機構部等の配置構成等に応じて適宜選択採用される。 As the bearing device for the driven wheel in the bearing device for automobiles as described above, a so-called outer ring rotation bearing device in which the outer ring is axially rotatable supported by the inner ring on the fixed side may be used. An encoder is attached to such a bearing device for rotating the outer ring, and a sensor installed on the vehicle body side (fixed side) detects the rotation of the driven wheel to form an anti-lock braking system or a traction control system. (See, for example, Patent Documents 1 to 3). Further, in order to prevent foreign matter from entering the bearing device and leakage of the lubricant (grease, etc.) filled in the bearing device to the outside, a sealing device is installed between the ends of the inner ring and the outer ring of the bearing device. Ru. Further, Patent Documents 1 to 3 show an example in which an encoder including a support member is configured to form a part of a sealing device. Further, as the wheel rotation detection mechanism using the encoder in Patent Documents 1 to 3, a radial type in which the detected surface of the encoder and the detection surface of the sensor face each other in the radial direction and an axial type facing each other in the axial direction are disclosed. Has been done. Such radial type and axial type rotation detection mechanisms are appropriately selected and adopted according to the specifications of the bearing device and the arrangement configuration of peripheral mechanical parts and the like.

実開平５−２６７００号公報Square root extraction No. 5-26700 特開２００９−３６３２１号公報JP-A-2009-36321 特開２０１４−１３０７３号公報Japanese Unexamined Patent Publication No. 2014-13073

特許文献１の図４には、シール外環（エンコーダ）が外輪の内周面に嵌合され、このシール外環は外輪の外周面より外径側に位置する折り曲げ部を有し、この折り曲げ部にセンサに径方向で対峙する打ち抜き穴を形成してセンサロータとするラジアルタイプの回転検出機構が示されている。そして、シール外環は、内輪の外周面に嵌合されるシール内環に摺接するリップを有するゴム製の密封板を有し、シール外環とシール内環とが組み合わさって軸受装置の密封装置を構成する。ところで、このような密封装置の場合、外輪の外周面と折り曲げ部との隙間が狭いと、センサロータに対峙して配置されるセンサが打ち抜き穴を通して外輪の外周面を検出し、これが検出精度に悪影響を及ぼすことが懸念される。そのため、センサの設置位置とも関係して、センサロータの径方向位置の設計自由度が狭くなることは否めないものと考えられる。 In FIG. 4 of Patent Document 1, a seal outer ring (encoder) is fitted to the inner peripheral surface of the outer ring, and the seal outer ring has a bent portion located on the outer diameter side of the outer peripheral surface of the outer ring, and the bent portion is formed. A radial type rotation detection mechanism is shown in which a punched hole facing the sensor in the radial direction is formed in the portion to form a sensor rotor. The outer ring of the seal has a rubber sealing plate having a lip that slides into the inner ring of the seal fitted to the outer peripheral surface of the inner ring, and the outer ring of the seal and the inner ring of the seal are combined to seal the bearing device. Configure the device. By the way, in the case of such a sealing device, if the gap between the outer peripheral surface of the outer ring and the bent portion is narrow, the sensor arranged facing the sensor rotor detects the outer peripheral surface of the outer ring through the punched hole, which improves the detection accuracy. There is concern that it will have an adverse effect. Therefore, it is undeniable that the degree of freedom in designing the radial position of the sensor rotor is narrowed in relation to the installation position of the sensor.

また、特許文献２の図６には、外輪の内周面及び外周面に嵌合される第２のシール部材の外周部に凹凸部を形成し、これにセンサを径方向に対峙させることによってラジアルタイプの回転検出機構が構成される例が示されている。しかし、この例では、スリンガとシール環体とからなる第１のシール部材と、前記第２のシール部材とにより実質的に３部材によって密封装置が構成されるため、部品点数が多く、また、当該密封装置の軸受装置に対する圧入による組付け工数が多くなることが予想される。
さらに、特許文献３には、外輪の外周面に嵌合されるダストカバーの外輪に対する嵌合部に磁気エンコーダを接合し、これにセンサを径方向に対峙させることによってラジアルタイプの回転検出機構が構成される例が示されている。しかし、この例では、ダストカバー及び磁気エンコーダの厚みに加工上の制約があるため、センサの設置位置によっては、センサと磁気エンコーダとのエアギャップが大きくなることがあり、これによって検出精度に影響を及ぼすことが懸念される。また、この例でも、密封装置が、スリンガ、環状のシール板及びダストカバーの３部材によって構成されるため、部品点数が多く、当該密封装置の軸受装置に対する圧入による組付け工数が多くなることが予想される。 Further, in FIG. 6 of Patent Document 2, a concavo-convex portion is formed on the outer peripheral portion of the second seal member fitted to the inner peripheral surface and the outer peripheral surface of the outer ring, and the sensor is confronted with the uneven portion in the radial direction. An example in which a radial type rotation detection mechanism is configured is shown. However, in this example, since the sealing device is substantially composed of three members by the first sealing member composed of the slinger and the sealing ring and the second sealing member, the number of parts is large and the number of parts is large. It is expected that the number of man-hours for assembling the sealing device by press fitting into the bearing device will increase.
Further, in Patent Document 3, a radial type rotation detection mechanism is provided by joining a magnetic encoder to a fitting portion of a dust cover fitted to the outer peripheral surface of the outer ring with respect to the outer ring and confronting the sensor in the radial direction. An example of the configuration is shown. However, in this example, due to processing restrictions on the thickness of the dust cover and magnetic encoder, the air gap between the sensor and the magnetic encoder may increase depending on the sensor installation position, which affects the detection accuracy. Is a concern. Further, in this example as well, since the sealing device is composed of three members, a slinger, an annular seal plate, and a dust cover, the number of parts is large, and the man-hours for assembling the sealing device by press fitting into the bearing device may increase. is expected.

本発明は、上記実情に鑑みなされたもので、エンコーダの径方向位置の設計自由度が広く、また、部品点数及び組付け工数を少なくすることができる、エンコーダ及びシール部材を備えた密封装置を提供することを目的としている。 The present invention has been made in view of the above circumstances, and provides a sealing device including an encoder and a sealing member, which has a wide degree of freedom in designing the radial position of the encoder and can reduce the number of parts and the number of assembly steps. It is intended to be provided.

本発明に係る密封装置は、内輪と、該内輪に同軸回転可能に支持される外輪とを有する軸受装置の前記内輪及び外輪の間を密封する密封装置であって、エンコーダとシール部材とからなり、前記エンコーダは、前記外輪の内周面に嵌合される嵌合円筒部、該嵌合円筒部の前記軸受装置における軸方向外方側に向く一端部から前記外輪の外周面よりも外径側に延びる外径側円輪部、該外径側円輪部の外径側端部より前記軸受装置における軸方向内方側に延びる外径側円筒部、及び、前記嵌合円筒部の軸方向内方側に向く他端部から内径方向に延びる内径側円輪部を含む支持部材と、該支持部材における前記外径側円筒部の外周面に一体に設けられた環状磁石とからなり、前記外径側円筒部が、前記外輪の外周面から外径側に離れた位置に配されており、前記シール部材は、前記内輪の外周面に嵌合される金属環円筒部、及び、該金属環円筒部の一端部から外径方向に延びる金属環円輪部を含む金属環と、該金属環に一体に設けられて前記支持部材に接触又は近接するシールリップを有する弾性シール部材とからなり、該弾性シール部材が、前記金属環円輪部における、前記軸受装置の軸方向外方を向く面を覆っていることを特徴とする。 The sealing device according to the present invention is a sealing device that seals between the inner ring and the outer ring of a bearing device having an inner ring and an outer ring rotatably supported by the inner ring, and comprises an encoder and a sealing member. The encoder has a fitting cylindrical portion fitted to the inner peripheral surface of the outer ring, and one end portion of the fitting cylindrical portion facing outward in the axial direction in the bearing device to have an outer diameter larger than the outer peripheral surface of the outer ring. The outer diameter side annular portion extending to the side, the outer diameter side cylindrical portion extending axially inward in the bearing device from the outer diameter side end portion of the outer diameter side annular portion, and the shaft of the fitting cylindrical portion. It is composed of a support member including an inner diameter side annular portion extending in the inner diameter direction from the other end portion facing inward in the direction, and an annular magnet integrally provided on the outer peripheral surface of the outer diameter side cylindrical portion in the support member. The outer diameter side cylindrical portion is arranged at a position separated from the outer peripheral surface of the outer ring on the outer diameter side, and the sealing member is a metal ring cylindrical portion fitted to the outer peripheral surface of the inner ring, and the said. From a metal ring including a metal ring ring portion extending in the outer diameter direction from one end of the metal ring cylindrical portion, and an elastic sealing member integrally provided with the metal ring and having a seal lip in contact with or close to the support member. Therefore, the elastic sealing member covers the surface of the metal ring ring portion that faces outward in the axial direction of the bearing device.

本発明によれば、内輪の外周面に嵌合される金属環に一体に設けられた弾性シール部材のシールリップが、外輪の内周面に嵌合される支持部材に接触又は近接するから、軸受装置の内輪及び外輪の間が密封される。外輪が内輪に対して同軸回転する場合も、シールリップが、支持部材に相対摺接又は近接した状態とされるから、前記密封機能が維持される。これによって、軸受装置内部への異物の侵入や、軸受装置内に充填される潤滑剤（グリース等）の外部漏出が防止される。また、外輪と一体とされる支持部材における外径側円筒部の外周面には、環状磁石が一体とされてエンコーダが構成されるから、軸受装置外の固定側に、環状磁石に径方向に対峙するよう磁気センサを設置すれば、外輪と一体に取付けられる回転体の回転検出機構が構成される。そして、環状磁石は、外輪の外周面より外径側に位置する外径側円筒部の外周面に一体に設けられるから、固定側のレイアウト構成によって径方向位置が設定される磁気センサに対して所定のエアギャップをもって環状磁石を対峙させるよう設計することが容易になされる。即ち、環状磁石の径方向位置は、外径側円輪部の径方向長さによって定まるから、外径側円輪部の径方向長さを設定することにより、本発明に係る密封装置が適用される軸受装置の仕様に適宜対応させることができ、設計自由度が増大する。さらに、本発明に係る密封装置は、エンコーダとシール部材との２部材からなるから、外輪回転の軸受装置に適用されるものでありながら、エンコーダ機能及び密封機能を備えた密封装置として部品点数少なく好適に構成される。加えて、部品点数が少なくなることにより、軸受装置に対する圧入を伴う組付け工数が削減され、軸受装置の組立の効率化に寄与する。 According to the present invention, the seal lip of the elastic sealing member integrally provided on the metal ring fitted to the outer peripheral surface of the inner ring contacts or approaches the supporting member fitted to the inner peripheral surface of the outer ring. The space between the inner ring and the outer ring of the bearing device is sealed. Even when the outer ring rotates coaxially with respect to the inner ring, the seal lip is brought into a state of relative sliding contact or close contact with the support member, so that the sealing function is maintained. This prevents foreign matter from entering the bearing device and leakage of the lubricant (grease, etc.) filled in the bearing device to the outside. Further, since an annular magnet is integrally formed on the outer peripheral surface of the outer diameter side cylindrical portion of the support member integrated with the outer ring to form an encoder, the annular magnet is radially on the fixed side outside the bearing device. If a magnetic sensor is installed so as to face each other, a rotation detection mechanism for a rotating body that is integrally attached to the outer ring is configured. Since the annular magnet is integrally provided on the outer peripheral surface of the outer diameter side cylindrical portion located on the outer diameter side of the outer peripheral surface of the outer ring, the magnetic sensor whose radial position is set according to the layout configuration on the fixed side It is easy to design the annular magnets to face each other with a predetermined air gap. That is, since the radial position of the annular magnet is determined by the radial length of the outer diameter side annular portion, the sealing device according to the present invention can be applied by setting the radial length of the outer diameter side annular portion. The specifications of the bearing device to be used can be appropriately adapted, and the degree of freedom in design is increased. Further, since the sealing device according to the present invention is composed of two members, an encoder and a sealing member, the number of parts is small as a sealing device having an encoder function and a sealing function, although it is applied to a bearing device for rotating an outer ring. Suitablely configured. In addition, by reducing the number of parts, the number of assembling man-hours required for press fitting into the bearing device is reduced, which contributes to the efficiency of assembling the bearing device.

本発明の密封装置において、前記シールリップは、前記内径側円輪部及び／又は嵌合円筒部に接触又は近接するように形成されているものとしても良い。
これによれば、シールリップが、前記内径側円輪部及び／又は嵌合円筒部に接触又は近接するから、内輪と外輪との間が好適に密封される。特に、内径側円輪部及び嵌合円筒部の両方にシールリップを接触又は近接させるようにすれば、内輪と外輪との間がより的確に密封される。 In the sealing device of the present invention, the seal lip may be formed so as to be in contact with or close to the inner diameter side annular portion and / or the fitting cylindrical portion.
According to this, since the seal lip comes into contact with or is close to the inner diameter side circular ring portion and / or the fitting cylindrical portion, the space between the inner ring and the outer ring is preferably sealed. In particular, if the seal lip is brought into contact with or close to both the inner ring portion and the fitting cylindrical portion, the inner ring and the outer ring are more accurately sealed.

本発明の密封装置において、前記内径側円輪部は、屈折部を有しているものとしても良い。
これによれば、シールリップの内径側円輪部に対する接触又は近接範囲が実質的に広められるから、シールリップの形状や個数の設計自由度が増大し、シールリップによるシール機能を的確に発揮させるように設計することができる。 In the sealing device of the present invention, the inner ring portion may have a refracting portion.
According to this, since the contact or proximity range of the seal lip with respect to the inner ring portion on the inner diameter side is substantially widened, the degree of freedom in designing the shape and number of the seal lips is increased, and the sealing function of the seal lips is accurately exhibited. Can be designed as

本発明の密封装置において、前記環状磁石は、磁性粉を含有するゴム材の成型体からなり、当該環状磁石の外周面は周方向に沿って多数のＮ極及びＳ極が交互に着磁された多極磁石とされているものとしても良い。
これによれば、環状磁石は、磁性粉を含有するゴム材の成型体からなるから、支持部材の外径側円筒部に対する一体化がゴム材の成型によって簡易になされる。また、環状磁石の外周面が多極磁石とされていることにより、当該外周面に対峙するよう設置される磁気センサによって、外輪に取付けられる回転部材の回転検出が精度良くなされる。 In the sealing device of the present invention, the annular magnet is made of a molded body of a rubber material containing magnetic powder, and a large number of N poles and S poles are alternately magnetized on the outer peripheral surface of the annular magnet along the circumferential direction. It may be a multi-pole magnet.
According to this, since the annular magnet is made of a molded body of a rubber material containing magnetic powder, the support member can be easily integrated with the outer diameter side cylindrical portion by molding the rubber material. Further, since the outer peripheral surface of the annular magnet is a multi-pole magnet, the rotation of the rotating member attached to the outer ring can be detected with high accuracy by the magnetic sensor installed so as to face the outer peripheral surface.

本発明の密封装置において、前記外径側円輪部は、前記外輪の軸方向端面に沿うように形成されているものとしても良い。
これによれば、エンコーダの軸方向位置を外輪の軸方向端面を基準として設定することができる。 In the sealing device of the present invention, the outer diameter side circular ring portion may be formed along the axial end surface of the outer ring.
According to this, the axial position of the encoder can be set with reference to the axial end surface of the outer ring.

本発明の密封装置によれば、エンコーダの径方向位置の設計自由度が増大し、また、部品点数及び組付け工数を少なくすることができる。 According to the sealing device of the present invention, the degree of freedom in designing the radial position of the encoder can be increased, and the number of parts and the number of assembly steps can be reduced.

本発明に係る密封装置が装着された軸受装置の一例を示す概略的断面図である。It is a schematic sectional drawing which shows an example of the bearing device which attached the sealing device which concerns on this invention. 本発明に係る密封装置の第一の実施形態であって、図１のＸ部の拡大図である。It is the first embodiment of the sealing device which concerns on this invention, and is the enlarged view of the X part of FIG. 同第二の実施形態の図２と同様図である。It is the same figure as FIG. 2 of the second embodiment. 同第三の実施形態の図２と同様図である。It is the same figure as FIG. 2 of the third embodiment. 同第四の実施形態の図２と同様図である。It is the same figure as FIG. 2 of the fourth embodiment. 同第五の実施形態の図２と同様図である。It is the same figure as FIG. 2 of the fifth embodiment. 同第六の実施形態の図２と同様図である。It is the same figure as FIG. 2 of the sixth embodiment.

以下に本発明の実施の形態について、図面を参照して説明する。図１は、本発明に係る密封装置が装着された軸受装置の一例を示している。図１に示す軸受装置１は、自動車の従動輪を回転自在に支持するハブベアリングである。図例のハブベアリング（軸受装置）１は、車体（不図示）に固定される支持軸（スピンドル）２に一体に嵌合された内輪３，４の外径部に２列の転動体（玉）５…を介して、ハブ輪（外輪）６が軸Ｌの回りに同軸回転自在に支持されている。ハブ輪６は、ハブフランジ（外向きのフランジ部）６１を有し、該ハブフランジ６１に、不図示の従動輪（タイヤホイール）がボルト６２によって取付けられる。前記内輪３，４とハブ輪６との間に、前記転動体５…が、リテーナ５ａに保持された状態で、内輪３，４の軌道輪３ａ，４ａとハブ輪６の軌道輪６ａ，６ａとの間を転動し得るように介装されている。転動体５…の介装部分を含む内輪３，４とハブ輪６との間が被密封空間としての環状の軸受空間Ｓとされ、この軸受空間Ｓには、転動体５…の転動を円滑にするための潤滑剤（例えば、グリース）が充填される。以下において、図１の紙面左側を車輪側、右側を車体側と言う。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a bearing device equipped with a sealing device according to the present invention. The bearing device 1 shown in FIG. 1 is a hub bearing that rotatably supports a driving wheel of an automobile. The hub bearing (bearing device) 1 in the illustrated example has two rows of rolling elements (balls) on the outer diameters of the inner rings 3 and 4 integrally fitted to the support shaft (spindle) 2 fixed to the vehicle body (not shown). ) 5 ... The hub ring (outer ring) 6 is supported around the shaft L so as to be coaxially rotatable. The hub wheel 6 has a hub flange (outward flange portion) 61, and a driven wheel (tire wheel) (not shown) is attached to the hub flange 61 by a bolt 62. The rolling elements 5 ... Are held between the inner rings 3 and 4 and the hub ring 6 by the retainer 5a, and the raceway rings 3a and 4a of the inner rings 3 and 4 and the raceway rings 6a and 6a of the hub ring 6 are held. It is mediated so that it can roll between and. The space between the inner rings 3 and 4 including the interposing portion of the rolling element 5 ... and the hub ring 6 is an annular bearing space S as a sealed space, and the rolling body 5 ... Is rolled in this bearing space S. It is filled with a lubricant (eg, grease) for smoothing. In the following, the left side of the paper in FIG. 1 is referred to as the wheel side, and the right side is referred to as the vehicle body side.

前記ハブ輪６の車輪側端部には、その開口部を閉塞するキャップ７が装着されている。また、ハブ輪６の車体側端部と車体側内輪４との間には、ベアリングシール８が、装着されている。このキャップ７及びベアリングシール８が、前記軸受空間Ｓを密封する密封装置を構成する。両密封装置（キャップ７及びベアリングシール８）によって、軸受空間Ｓ内への泥水や塵埃等の異物（以下、泥水等と言う）の浸入が防止され、また、軸受空間Ｓ内に充填される潤滑剤（グリース等）の外部漏出が防止される。両密封装置７，８のうち、車輪側のベリングシール８に本発明に係る密封装置が適用される。 A cap 7 that closes the opening of the hub wheel 6 is attached to the wheel-side end of the hub wheel 6. Further, a bearing seal 8 is mounted between the vehicle body side end portion of the hub wheel 6 and the vehicle body side inner ring 4. The cap 7 and the bearing seal 8 constitute a sealing device for sealing the bearing space S. Both sealing devices (cap 7 and bearing seal 8) prevent foreign matter such as muddy water and dust (hereinafter referred to as muddy water) from entering the bearing space S, and lubrication filled in the bearing space S. The leakage of the agent (grease, etc.) to the outside is prevented. Of the two sealing devices 7 and 8, the sealing device according to the present invention is applied to the belling seal 8 on the wheel side.

図２をも参照して、本発明に係る密封装置の第一の実施形態について詳細に説明する。本実施形態の密封装置としてのベアリングシール８は、基本的には、エンコーダ９とシール部材１０とから構成される。エンコーダ９は、ハブ輪６における車体側端部６ｂの内周面６ｃに嵌合される嵌合円筒部９１、嵌合円筒部９１のハブベアリング１における軸Ｌ方向外方側（車体側）に向く一端部９１ａからハブ輪６の外周面６ｄよりも外径側に延びる外径側円輪部９２、外径側円輪部９２の外径側端部９２ａよりハブベアリング１における軸Ｌ方向内方側（車輪側）に延びる外径側円筒部９３、及び、嵌合円筒部９１の軸Ｌ方向内方側（車輪側）に延びる他端部９１ｂから内径方向に延びる内径側円輪部９４を含む金属製の支持部材９０と、支持部材９０における外径側円筒部９３の外周面９３ａに一体に設けられた環状磁石９００とからなる。本実施形態における内径側円輪部９４は、その内径側端部９４ａより車体側に向くよう屈折された円筒形状の屈折部９５をさらに備えている。また、シール部材１０は、車体側内輪４の外周面４ｂに嵌合される金属環円筒部１１１、及び、金属環円筒部１１１の車体側一端部１１１ａから外径方向に延びる金属環円輪部１１２を含む金属環１１と、金属環１１に一体に設けられて支持部材９０に接触又は近接（図例では弾性的に接触、以下弾接と言う）するシールリップ１２１，１２２，１２３を有する弾性シール部材１２とからなる。 A first embodiment of the sealing device according to the present invention will be described in detail with reference to FIG. The bearing seal 8 as the sealing device of the present embodiment is basically composed of an encoder 9 and a sealing member 10. The encoder 9 is provided on the fitting cylindrical portion 91 fitted to the inner peripheral surface 6c of the vehicle body side end portion 6b of the hub wheel 6, and on the outer side (vehicle body side) in the axial L direction of the hub bearing 1 of the fitting cylindrical portion 91. The outer diameter side annular portion 92 extending from the facing end portion 91a to the outer diameter side of the outer diameter surface 6d of the hub wheel 6, and the outer diameter side end portion 92a of the outer diameter side annular portion 92 in the shaft L direction in the hub bearing 1. Inner diameter side circular ring portion 94 extending in the inner diameter direction from the outer diameter side cylindrical portion 93 extending toward the side (wheel side) and the other end portion 91b extending inward (wheel side) in the axial L direction of the fitting cylindrical portion 91. The support member 90 is made of metal and includes an annular magnet 900 integrally provided on the outer peripheral surface 93a of the outer diameter side cylindrical portion 93 of the support member 90. The inner diameter side circular ring portion 94 in the present embodiment further includes a cylindrical refracting portion 95 bent so as to face the vehicle body side from the inner diameter side end portion 94a. Further, the seal member 10 is a metal ring cylindrical portion 111 fitted to the outer peripheral surface 4b of the inner ring 4 on the vehicle body side, and a metal ring annular portion extending in the outer radial direction from one end portion 111a on the vehicle body side of the metal ring cylindrical portion 111. Elasticity having a metal ring 11 including 112 and seal lips 121, 122, 123 integrally provided with the metal ring 11 and in contact with or close to the support member 90 (elastic contact in the example, hereinafter referred to as elastic contact). It is composed of a seal member 12.

エンコーダ９における支持部材９０の嵌合円筒部９１、外径側円筒部９３、円筒形状の屈折部９５、及びシール部材１０における金属環１１の金属環円筒部１１１は、いずれも軸Ｌを中心として同心状に形成されている。また、支持部材９０の外径側円輪部９２は、嵌合円筒部９１がハブ輪６の内周面６ｃに嵌合された状態で、ハブ輪６の車体側端面（軸方向端面）６ｅに密着的に沿うようになされている。支持部材９０の外径側円筒部９３は、ハブ輪６の外周面６ｄより外径側に離れた位置であり、外径側円筒部９３の外周面９３ａに一体に設けられた環状磁石９００の表面と車体側に設置される磁気センサ１３との間に所定のエアギャップｄが確保されて対峙する位置になるように設定される。環状磁石９００は、多量の磁性粉を含有するゴム材等のエラストマー或いは樹脂材（図例は、ゴム材であることを示している）の成型体からなり、支持部材９０に対してインサート成型により一体とされている。環状磁石９００は、支持部材９０における外径側円輪部９２の車体側端部９２ａから、外径側円筒部９３の外周面９３ａを覆い、外径側円筒部９３の車輪側端部９３ｂを回り込むように、支持部材９０の外径側円筒部に固着一体とされている。そして、環状磁石９００の外径側に向く外周面は、その周方向に多数のＮ極及びＳ極が交互に繰り返すよう着磁された着磁面９００ａとされ、ハブ輪６の軸回転に伴う着磁面９００ａによる磁気変化が、固定側（ハブベアリング１の外輪或いは車体側、図１では後者）に設置された磁気センサ１３によって検出される。これによって、ハブ輪６に取付けられる前記タイヤホイールの回転検出機構が構成される。 The fitting cylindrical portion 91 of the support member 90 in the encoder 9, the outer diameter side cylindrical portion 93, the cylindrical refracting portion 95, and the metal ring cylindrical portion 111 of the metal ring 11 in the seal member 10 are all centered on the axis L. It is formed concentrically. Further, in the outer diameter side circular ring portion 92 of the support member 90, the fitting cylindrical portion 91 is fitted to the inner peripheral surface 6c of the hub ring 6, and the vehicle body side end surface (axial end surface) 6e of the hub wheel 6 is provided. It is made to closely follow. The outer diameter side cylindrical portion 93 of the support member 90 is located at a position separated from the outer diameter side 6d of the hub ring 6 on the outer diameter side, and the annular magnet 900 integrally provided on the outer diameter side 93a of the outer diameter side cylindrical portion 93. A predetermined air gap d is secured between the surface and the magnetic sensor 13 installed on the vehicle body side, and the positions are set so as to face each other. The annular magnet 900 is made of a molded body of an elastomer or resin material (the figure shows that it is a rubber material) such as a rubber material containing a large amount of magnetic powder, and is inserted into the support member 90 by insert molding. It is united. The annular magnet 900 covers the outer peripheral surface 93a of the outer diameter side cylindrical portion 93 from the vehicle body side end portion 92a of the outer diameter side circular ring portion 92 in the support member 90, and covers the wheel side end portion 93b of the outer diameter side cylindrical portion 93. It is fixed and integrated with the outer diameter side cylindrical portion of the support member 90 so as to wrap around. The outer peripheral surface of the annular magnet 900 facing the outer diameter side is a magnetized surface 900a magnetized so that a large number of N poles and S poles alternately repeat in the circumferential direction, and is accompanied by axial rotation of the hub ring 6. The magnetic change due to the magnetized surface 900a is detected by the magnetic sensor 13 installed on the fixed side (the outer ring or the vehicle body side of the hub bearing 1, the latter in FIG. 1). As a result, the rotation detection mechanism of the tire wheel attached to the hub wheel 6 is configured.

弾性シール部材１２は、ゴム材等のエラストマーからなり、金属環１１に対してインサート成型により一体に形成されている。弾性シール部材１２は、金属環円輪部１１２における車体側面１１２ａの全面を覆い、同外径側端部１１２ｂを回り込み、さらに、同車輪側面１１２ｃに及ぶように金属環円筒部１１２に固着一体とされるリップ基部１２０を有している。前記シールリップ１２１，１２２，１２３は、このリップ基部１２０から所定の方向に延びるように設けられている。即ち、本実施形態では、シールリップ１２１は、その先端部が車体側に向き、支持部材９０における嵌合円筒部９１の内周面９１ｃに弾接するように形成されている。また、シールリップ１２２は、その先端部が車輪側且つ外径側に向き、支持部材９０における内径側円輪部９４の車体側面９４ｂに弾接するように形成されている。さらに、シールリップ１２３は、その先端部が車輪側に向き、支持部材９０における屈折部９５の内周面９５ａに弾接するように形成されている。各シールリップ１２１，１２２，１２３の２点鎖線で示す部分は、それぞれの弾性変形前の原形状であることを示している（以下、同様）。また、リップ基部１２０における金属環円輪部１１２の車体側面１１２ａを覆う部分の内径側端部には、金属環１１と車体側内輪４の外周面４ｂとの間に弾性圧縮状態で介在する環状の内向突部１２４が形成されている。図では、弾性圧縮変形前の原形状の内向突部１２４を２点鎖線で示している（以下、同様）。このような内向突部１２４が金属環円筒部１１１と車体側内輪４の外周面４ｂとの間に弾性圧縮状態で介在することにより、車体側内輪４と金属環円筒部１１１との嵌合部に泥水等が浸入することが防止され、当該嵌合部の錆の発生が抑えられる。 The elastic sealing member 12 is made of an elastomer such as a rubber material, and is integrally formed with the metal ring 11 by insert molding. The elastic sealing member 12 covers the entire surface of the vehicle body side surface 112a of the metal ring ring portion 112, wraps around the outer diameter side end portion 112b, and is further fixed and integrated to the metal ring cylindrical portion 112 so as to extend to the wheel side surface 112c. It has a lip base 120 to be formed. The seal lips 121, 122, 123 are provided so as to extend in a predetermined direction from the lip base 120. That is, in the present embodiment, the seal lip 121 is formed so that the tip end portion thereof faces the vehicle body side and is in bullet contact with the inner peripheral surface 91c of the fitting cylindrical portion 91 of the support member 90. Further, the seal lip 122 is formed so that the tip portion thereof faces the wheel side and the outer diameter side and is in bullet contact with the vehicle body side surface 94b of the inner diameter side circular ring portion 94 of the support member 90. Further, the seal lip 123 is formed so that the tip end portion thereof faces the wheel side and comes into contact with the inner peripheral surface 95a of the refracting portion 95 of the support member 90. The portion indicated by the alternate long and short dash line of each of the seal lips 121, 122, 123 indicates that it is the original shape before the elastic deformation (hereinafter, the same applies). Further, at the inner diameter side end portion of the portion of the lip base 120 that covers the vehicle body side surface 112a of the metal ring ring portion 112, an annular shape is interposed between the metal ring 11 and the outer peripheral surface 4b of the vehicle body side inner ring 4 in an elastically compressed state. The inward protrusion 124 of the above is formed. In the figure, the introverted protrusion 124 of the original shape before elastic compression deformation is shown by a two-dot chain line (hereinafter, the same applies). Such an inwardly projecting portion 124 is interposed between the metal ring cylindrical portion 111 and the outer peripheral surface 4b of the vehicle body side inner ring 4 in an elastically compressed state, so that the fitting portion between the vehicle body side inner ring 4 and the metal ring cylindrical portion 111 is fitted. It is possible to prevent muddy water and the like from entering the fitting portion, and to suppress the occurrence of rust on the fitting portion.

このような構成のベアリングシール８は、図１に示すようなハブベアリング１における軸受空間Ｓの車体側開口部に装着される。具体的には、先ず、専用の圧入治具（不図示）を用い、支持部材９０の嵌合円筒部９１をハブ輪６の車体側端部６ｂに内嵌させることによって、エンコーダ９を、ハブ輪６の所定位置に装着する。次いで、専用の圧入治具（不図示）を用い、金属環１１の金属環円筒部１１１を車体側の内輪４に外嵌させることによって、シール部材１０を、内輪４の所定位置に装着する。エンコーダ９とシール部材１０とを事前に組み合わせた状態にしておき、前記圧入治具をエンコーダ９及びシール部材１０に同時に作用させることによって、この装着を行うことも可能である。圧入治具を用いたベアリングシール８の装着の際、支持部材９０の外径側円輪部９２をハブ輪６の車体側端面６ｅに密着的に沿うようになされる。したがって、エンコーダ９の軸Ｌ方向位置をハブ輪６の車体側端面６ｅを基準として設定することができ、エンコーダ９が軸Ｌ方向に所定の位置に精度良く装着される。 The bearing seal 8 having such a configuration is mounted on the vehicle body side opening of the bearing space S in the hub bearing 1 as shown in FIG. Specifically, first, the encoder 9 is fitted to the hub by fitting the fitting cylindrical portion 91 of the support member 90 into the vehicle body side end portion 6b of the hub wheel 6 using a dedicated press-fitting jig (not shown). It is mounted at a predetermined position on the ring 6. Next, the seal member 10 is mounted at a predetermined position on the inner ring 4 by fitting the metal ring cylindrical portion 111 of the metal ring 11 to the inner ring 4 on the vehicle body side using a dedicated press-fitting jig (not shown). It is also possible to carry out this mounting by setting the encoder 9 and the seal member 10 in a state of being combined in advance and allowing the press-fitting jig to act on the encoder 9 and the seal member 10 at the same time. When the bearing seal 8 is mounted using the press-fitting jig, the outer diameter side circular ring portion 92 of the support member 90 is closely aligned with the vehicle body side end surface 6e of the hub wheel 6. Therefore, the position of the encoder 9 in the axis L direction can be set with reference to the vehicle body side end surface 6e of the hub wheel 6, and the encoder 9 is accurately mounted at a predetermined position in the axis L direction.

このようにベアリングシール８が装着されたハブベアリング１において、内輪４の外周面４ｂに嵌合される金属環１１に一体に設けられた弾性シール部材１２のシールリップ１２１，１２２，１２３が、ハブ輪６の内周面６ｃに嵌合される支持部材９０に弾接しているから、ハブベアリング１の内輪４及びハブ輪６の間が密封される。ハブ輪６が軸Ｌの回りに回転する場合、シールリップ１２１，１２２，１２３が、支持部材９０に対して相対的に弾性摺接した状態とされるから、同様に密封機能が維持される。特に、シールリップ１２１は、その先端部側が、外径方向且つ車体側に向いた状態で嵌合円筒部９１の内周面９１ｃに弾接しているから、外部から軸受空間Ｓ側への泥水等の浸入防止が的確になされる。さらに、この泥水等の浸入方向の下流側には、シールリップ１２２が、その先端部側が外径方向且つ車輪側に向いた状態で内径側円輪部９４の車体側面９４ｂに弾接しているから、軸受空間Ｓ側への泥水等の浸入防止がより的確になされる。また、シールリップ１２２の弾接位置より前記浸入方向のさらに下流側には、シールリップ１２３が、その先端部側が外径方向且つ車輪側に向いた状態で屈折部９５の内周面９５ａに弾接しているから、軸受空間Ｓ内に充填されている潤滑剤等の外部漏出が的確に防止される。また、ハブ輪６の軸回転に伴い、軸受空間Ｓ内が温度上昇して、軸受空間Ｓの内圧が高くなるが、シールリップ１２３の先端部がこの内圧に対向するように屈折部９５の内周面９５ａに弾接しているから、内圧がこの弾接部で遮断される。したがって、シールリップ１２２，１２１の先端部が内圧によって捲れ上がるようなことが生じ難く、シールリップ１２２，１２１によるシール機能に対する内圧の影響が抑えられる。これらによって、ハブベアリング１内部の軸受空間Ｓへの異物の侵入や、軸受空間Ｓ内に充填される潤滑剤（グリース等）の外部漏出が防止される。 In the hub bearing 1 to which the bearing seal 8 is mounted, the seal lips 121, 122, 123 of the elastic sealing member 12 integrally provided with the metal ring 11 fitted to the outer peripheral surface 4b of the inner ring 4 are the hubs. Since it is in contact with the support member 90 fitted to the inner peripheral surface 6c of the ring 6, the space between the inner ring 4 and the hub ring 6 of the hub bearing 1 is sealed. When the hub ring 6 rotates around the shaft L, the seal lips 121, 122, and 123 are in a state of being in elastic sliding contact with the support member 90, so that the sealing function is similarly maintained. In particular, since the tip end side of the seal lip 121 is in contact with the inner peripheral surface 91c of the fitting cylindrical portion 91 in a state of facing the outer diameter direction and the vehicle body side, muddy water or the like from the outside to the bearing space S side or the like. Intrusion prevention is done accurately. Further, on the downstream side in the infiltration direction of the muddy water or the like, the seal lip 122 is in contact with the vehicle body side surface 94b of the inner diameter side annular portion 94 with its tip end side facing the outer diameter direction and the wheel side. , The intrusion of muddy water or the like into the bearing space S side is more accurately prevented. Further, on the further downstream side of the intrusion direction from the impact position of the seal lip 122, the seal lip 123 hits the inner peripheral surface 95a of the refracting portion 95 with its tip end side facing the outer radial direction and the wheel side. Since they are in contact with each other, leakage of the lubricant or the like filled in the bearing space S to the outside is accurately prevented. Further, as the hub wheel 6 rotates about the axis, the temperature inside the bearing space S rises and the internal pressure of the bearing space S increases, but the inside of the refracting portion 95 so that the tip portion of the seal lip 123 faces the internal pressure. Since it is in contact with the peripheral surface 95a, the internal pressure is cut off at this contact portion. Therefore, it is unlikely that the tip portions of the seal lips 122 and 121 are rolled up by the internal pressure, and the influence of the internal pressure on the sealing function of the seal lips 122 and 121 is suppressed. As a result, it is possible to prevent foreign matter from entering the bearing space S inside the hub bearing 1 and leakage of the lubricant (grease or the like) filled in the bearing space S to the outside.

また、ハブ輪６と一体とされる支持部材９０における外径側円筒部９３の外周面９３ａには、環状磁石９００が一体とされてエンコーダ９が構成されるから、前記のように固定側に設置された磁気センサ１３によって、前記タイヤホイールの回転検出がなされる。そして、環状磁石９００は、ハブ輪６の外周面６ｄより外径側に位置する外径側円筒部９３の外周面９３ａに一体に設けられるから、固定側のレイアウト構成によって径方向位置が設定される磁気センサ１３に対して所定のエアギャップｄをもって環状磁石９００を対峙させるよう設計することが容易になされる。即ち、環状磁石９００の径方向位置は、外径側円輪部９２の径方向長さによって定まるから、外径側円輪部９２の径方向長さを設定することにより、ベアリングシール８が適用されるハブベアリング１の仕様に適宜対応させることができ、設計自由度が増大する。さらに、ベアリングシール８は、エンコーダ９とシール部材１０との２部材からなるから、外輪回転のハブベアリング１に適用されるものでありながら、エンコーダ機能及び密封機能を備えた密封装置として部品点数少なく好適に構成される。加えて、部品点数が少なくなることにより、ハブベアリング１に対するベアリングシール８の圧入を伴う組付け工数が削減され、ハブベアリング１の組立の効率化に寄与する。 Further, since the annular magnet 900 is integrated with the outer peripheral surface 93a of the outer diameter side cylindrical portion 93 of the support member 90 integrated with the hub wheel 6 to form the encoder 9, the encoder 9 is formed on the fixed side as described above. The installed magnetic sensor 13 detects the rotation of the tire wheel. Since the annular magnet 900 is integrally provided on the outer peripheral surface 93a of the outer diameter side cylindrical portion 93 located on the outer diameter side of the outer diameter surface 6d of the hub ring 6, the radial position is set according to the layout configuration on the fixed side. It is easy to design the annular magnet 900 to face the magnetic sensor 13 with a predetermined air gap d. That is, since the radial position of the annular magnet 900 is determined by the radial length of the outer diameter side annular portion 92, the bearing seal 8 is applied by setting the radial length of the outer diameter side annular portion 92. It is possible to appropriately correspond to the specifications of the hub bearing 1 to be performed, and the degree of freedom in design is increased. Further, since the bearing seal 8 is composed of two members, an encoder 9 and a seal member 10, the bearing seal 8 is applied to the hub bearing 1 for rotating the outer ring, but has a small number of parts as a sealing device having an encoder function and a sealing function. Suitablely configured. In addition, by reducing the number of parts, the number of man-hours for assembling the bearing seal 8 with press fitting to the hub bearing 1 is reduced, which contributes to the efficiency of assembly of the hub bearing 1.

図３は第二の実施形態の密封装置を示している。本実施形態の密封装置としてのベアリングシール８においては、環状磁石９００は、支持部材９０における外径側円輪部９２の車体側面９２ｂに沿って嵌合円筒部９１の一端部９１ａの近傍部に延び、該外径側円輪部９２の車体側面９２ｂを被覆するように固着された非着磁の円輪部被覆部９００ｂを有している。さらに、この円輪部被覆部９００ｂの内径側端部には、車体側に向け内径部が漸次拡径するように突出する突出部９００ｃが設けられている。一方、シール部材１０を構成する弾性シール部材１２のリップ基部１２０は、前記例のシールリップ１２１に代え金属環円輪部１１２の外径側端部１１２ｂから車体側に向け漸次拡径するように延びるリップ状延出部１２５を有している。そして、エンコーダ９側の前記突出部９００ｃの内径面９００ｄと、シール部材１０側の前記リップ状延出部１２５の外径面１２５ａとは略平行なラビリンスｒを形成する。このラビリンスｒによって、外部からベアリングシール８内への泥水等の浸入が防止される。仮に、ベアリングシール８内へ泥水等が浸入しても、ハブ輪６の軸回転に伴う支持部材９０の回転遠心作用によって、浸入した泥水等がラビリンスｒから速やかに排出される。
その他の構成は、第一の実施形態と同様であるので、共通部分に同一の符号を付してその説明を割愛する。 FIG. 3 shows the sealing device of the second embodiment. In the bearing seal 8 as the sealing device of the present embodiment, the annular magnet 900 is placed in the vicinity of one end 91a of the fitting cylindrical portion 91 along the vehicle body side surface 92b of the outer diameter side annular portion 92 of the support member 90. It has a non-magnetized annular portion covering portion 900b that extends and is fixed so as to cover the vehicle body side surface 92b of the outer diameter side annular portion 92. Further, the inner diameter side end portion of the circular ring portion covering portion 900b is provided with a protruding portion 900c that projects so that the inner diameter portion gradually increases in diameter toward the vehicle body side. On the other hand, the lip base 120 of the elastic seal member 12 constituting the seal member 10 gradually expands in diameter from the outer diameter side end portion 112b of the metal ring ring portion 112 toward the vehicle body side instead of the seal lip 121 of the above example. It has an extending lip-shaped extension 125. Then, a labyrinth r is formed in which the inner diameter surface 900d of the protruding portion 900c on the encoder 9 side and the outer diameter surface 125a of the lip-shaped extending portion 125 on the sealing member 10 side are substantially parallel to each other. The labyrinth r prevents muddy water and the like from entering the bearing seal 8 from the outside. Even if muddy water or the like enters the bearing seal 8, the infiltrated muddy water or the like is quickly discharged from the labyrinth r due to the rotational centrifugal action of the support member 90 accompanying the shaft rotation of the hub wheel 6.
Since the other configurations are the same as those in the first embodiment, the same reference numerals are given to the common parts and the description thereof will be omitted.

図４は第三の実施形態の密封装置を示している。本実施形態の密封装置としてのベアリングシール８においては、エンコーダ９を構成する支持部材９０の円筒形状の屈折部９５が、その車体側端部９５ｂからさらに内径側に延びる第２の内径側円輪部９６を有している。また、シール部材１０を構成する金属環１１の金属環円輪部１１２は、金属環円筒部１１１の車輪側一端部１１１ａより外径方向に延びるように形成されている。そして、弾性シール部材１２は、そのリップ基部１２０が、金属環円輪部１１２の外径側端部１１２ｂを回り込み、金属環円輪部１１２の車体側面１１２ａ及び金属環円筒部１１１の外周面１１１ｂを覆い金属環円筒部１１１の車体側他端部１１１ｃを回り込むように金属環１１に固着されている。このリップ基部１２０からは、支持部材９０に向く３個のシールリップ１２１，１２２，１２３が設けられている。シールリップ１２１は、その先端部が車輪側に向き、屈折部９５の内周面９５ａに弾接するように形成されている。また、シールリップ１２２は、その先端部が車体側に向き、屈折部９５の内周面９５ａに弾接するように形成されている。さらに、シールリップ１２３は、車体側且つ内径側に向き、第２の内径側円輪部９６の車輪側面９６ａに弾接するように形成されている。リップ基部１２０における金属環円筒部１１１の車体側他端部１１１ｃを回り込んだ部分には、前記と同様に金属環円筒部１１１と内輪４との間に圧縮状態で介在する環状の内向突部１２４が形成されている。第２の内径側円輪部１２６の内径側周縁部９６ｂと、リップ基部１２０における金属環円筒部１１１の車体側他端部１１１ｃを覆う部分との間にラビリンスｒ１が形成される。 FIG. 4 shows the sealing device of the third embodiment. In the bearing seal 8 as the sealing device of the present embodiment, the cylindrical refracting portion 95 of the support member 90 constituting the encoder 9 extends further toward the inner diameter side from the vehicle body side end portion 95b of the second inner diameter side circular ring. It has a part 96. Further, the metal ring ring portion 112 of the metal ring 11 constituting the seal member 10 is formed so as to extend in the outer diameter direction from one end portion 111a on the wheel side of the metal ring cylindrical portion 111. Then, the lip base portion 120 of the elastic sealing member 12 wraps around the outer diameter side end portion 112b of the metal ring ring portion 112, and the vehicle body side surface 112a of the metal ring ring portion 112 and the outer peripheral surface 111b of the metal ring cylindrical portion 111. The metal ring cylindrical portion 111 is fixed to the metal ring 11 so as to wrap around the other end portion 111c on the vehicle body side. From the lip base 120, three seal lips 121, 122, 123 facing the support member 90 are provided. The seal lip 121 is formed so that its tip portion faces the wheel side and is in impact with the inner peripheral surface 95a of the refracting portion 95. Further, the seal lip 122 is formed so that the tip portion thereof faces the vehicle body side and is in bullet contact with the inner peripheral surface 95a of the refracting portion 95. Further, the seal lip 123 is formed so as to face the vehicle body side and the inner diameter side and to be in bullet contact with the wheel side surface 96a of the second inner diameter side circular ring portion 96. An annular inward protrusion portion of the lip base 120 that wraps around the other end portion 111c of the metal ring cylindrical portion 111 on the vehicle body side and is interposed between the metal ring cylindrical portion 111 and the inner ring 4 in a compressed state as described above. 124 is formed. A labyrinth r1 is formed between the inner diameter side peripheral edge portion 96b of the second inner diameter side circular ring portion 126 and the portion of the lip base 120 that covers the vehicle body side other end portion 111c of the metal ring cylindrical portion 111.

このような構成のベアリングシール８を備えたハブベアリング１において、ラビリンスｒ１の存在により外部からベアリングシール８内への泥水等の浸入が防止される。仮に、ラビリンスｒ１を泥水等が通過しても、シールリップ１２２，１２３の先端部が、支持部材９０に対して泥水等の浸入方向に対向するように弾接しているから、軸受空間Ｓ内への泥水等の浸入が防止される。また、シールリップ１２１は、その先端部が軸受空間Ｓ側に向くように支持部材９０に弾接しているから、軸受空間Ｓ内に充填されている潤滑剤の外部漏出を防止し、軸受空間Ｓの内圧の上昇による他のシールリップ１２２，１２３のシール機能に対する前記のような内圧の影響も抑えられる。ハブ輪６の軸回転の間も、シールリップ１２１，１２２，１２３の支持部材９０に対する弾性的摺接によって、このシール機能が維持される。そして、内向突部１２４も、前記と同様に金属環円筒部１１１と内輪４との嵌合部への泥水等の浸入を防止し、この部分の発錆を抑える。
その他の構成は、第一の実施形態と同様であるから、共通部分に同一の符号を付しその説明を割愛する。 In the hub bearing 1 provided with the bearing seal 8 having such a configuration, the presence of the labyrinth r1 prevents muddy water and the like from entering the bearing seal 8 from the outside. Even if muddy water or the like passes through the labyrinth r1, the tips of the seal lips 122 and 123 are in bullet contact with the support member 90 so as to face the infiltration direction of the muddy water or the like, and thus enter the bearing space S. Intrusion of muddy water, etc. is prevented. Further, since the seal lip 121 is in contact with the support member 90 so that the tip portion thereof faces the bearing space S side, the lubricant filled in the bearing space S is prevented from leaking to the outside, and the bearing space S is prevented from leaking to the outside. The influence of the internal pressure as described above on the sealing functions of the other seal lips 122 and 123 due to the increase in the internal pressure of the bearing is also suppressed. This sealing function is maintained by the elastic sliding contact of the sealing lips 121, 122, 123 with the support member 90 even during the axial rotation of the hub wheel 6. Further, the inward protrusion 124 also prevents muddy water or the like from entering the fitting portion between the metal ring cylindrical portion 111 and the inner ring 4 in the same manner as described above, and suppresses rusting in this portion.
Since the other configurations are the same as those in the first embodiment, the same reference numerals are given to the common parts and the description thereof will be omitted.

図５は第四の実施形態の密封装置を示している。本実施形態の密封装置としてのベアリングシール８においては、支持部材９０の内径側円輪部９４が第一〜第三の実施形態に示すような円筒状の屈折部９５を有さず直状であって、シールリップ１２３が、内径側円輪部９４の車体側面９４ｂに、車輪側且つ内径側に向くよう弾接している。本実施形態のベアリングシール８において、シールリップ１２１，１２２は、第一の実施形態と同様のシール機能を奏する。また、シーリリップ１２３は、弾接対象が第一の実施形態と異なるが、その先端部の内径側円輪部９４に対する弾接する向きにより、軸受空間Ｓ内に充填される潤滑剤の外部漏出が第一の実施形態と同様に防止される。さらに、シーリリップ１２３の先端部の向きにより、軸受空間Ｓの内圧の上昇による他のシールリップ１２１，１２２のシール機能に対する内圧の影響が抑えられる。
その他の構成は、第一の実施形態と同様であるので、第一の実施形態と共通する部分に同一の符号を付して、その説明を割愛する。 FIG. 5 shows the sealing device of the fourth embodiment. In the bearing seal 8 as the sealing device of the present embodiment, the inner ring portion 94 of the support member 90 is straight without having the cylindrical refracting portion 95 as shown in the first to third embodiments. Therefore, the seal lip 123 is in bullet contact with the vehicle body side surface 94b of the inner diameter side circular ring portion 94 so as to face the wheel side and the inner diameter side. In the bearing seal 8 of the present embodiment, the seal lips 121 and 122 perform the same sealing function as that of the first embodiment. Further, although the object of impact of the seal lip 123 is different from that of the first embodiment, the lubricant filled in the bearing space S leaks to the outside depending on the direction of impact of the tip portion with respect to the inner diameter side circular ring portion 94. It is prevented as in one embodiment. Further, the orientation of the tip portion of the seal lip 123 suppresses the influence of the internal pressure on the sealing functions of the other seal lips 121 and 122 due to the increase in the internal pressure of the bearing space S.
Since the other configurations are the same as those in the first embodiment, the same reference numerals are given to the parts common to the first embodiment, and the description thereof will be omitted.

図６は第五の実施形態の密封装置を示している。本実施形態の密封装置としてのベアリングシール８は、車体側内輪４がその外周面４ｂに段差部４ｂａを有するハブベアリング１に装着される。即ち、シール部材１０を構成する金属環１１の金属環円筒部１１１は、この段差部４ｂａに外嵌される。また、エンコーダ９を構成する支持部材９０の内径側円輪部９４は、第四の実施形態と同様に第一〜第三の実施形態に示すような屈折部９５を有さず直状であって、内径側円輪部９４の内径側部分がこの段差部４ｂａによる凹所に臨むように構成されている。そして、内径側円輪部９４の内径側端部９４ａと、段差部４ｂａ及び段差部４ｂａによる断壁部４ｂｂとによって、屈曲するラビリンスｒ２が形成される。３個のシールリップ１２１，１２２，１２３は、第四の実施形態と同様に支持部材９０の嵌合円筒部９１及び内径側円輪部９４に弾接するが、シールリップ１２３は、シールリップ１２２と同様に、その先端部が車輪側且つ外径側に向くように形成されている。 FIG. 6 shows the sealing device of the fifth embodiment. The bearing seal 8 as the sealing device of the present embodiment is mounted on a hub bearing 1 in which the vehicle body side inner ring 4 has a stepped portion 4ba on the outer peripheral surface 4b thereof. That is, the metal ring cylindrical portion 111 of the metal ring 11 constituting the seal member 10 is fitted onto the step portion 4ba. Further, the inner ring portion 94 of the support member 90 constituting the encoder 9 is straight without having the refracting portion 95 as shown in the first to third embodiments as in the fourth embodiment. Therefore, the inner diameter side portion of the inner diameter side circular ring portion 94 is configured to face the recess due to the step portion 4ba. Then, the labyrinth r2 that bends is formed by the inner diameter side end portion 94a of the inner diameter side circular ring portion 94 and the wall breaking portion 4bb formed by the step portion 4ba and the step portion 4ba. The three seal lips 121, 122, 123 come into contact with the fitting cylindrical portion 91 and the inner diameter side annular portion 94 of the support member 90 as in the fourth embodiment, but the seal lip 123 is in contact with the seal lip 122. Similarly, the tip portion thereof is formed so as to face the wheel side and the outer diameter side.

本実施形態のベアリングシール８において、シールリップ１２１，１２２，１２３は、いずれもその先端部が、泥水等の浸入方向に対向する状態で支持部材９０に弾接するから、外部からの泥水等の浸入を的確に防止する。一方、軸受空間Ｓ側には、内径側円輪部９４の内径側端部９４ａと、段差部４ｂａ及び段差部４ｂａによる断壁部４ｂｂとによってラビリンスｒ２が形成されるから、軸受空間Ｓ内に充填される潤滑剤の外部漏出も防止される。また、内径側円輪部９４の内径側端部９４ａが、段差部４ｂａによる凹所に臨むようになされているから、軸受空間Ｓの内圧が上昇しても、シールリップ１２１，１２２，１２３に対する内圧の直接的な影響が内径側円輪部９４によって遮断される。
その他の構成は、第四の実施形態と同様であるので、第四の実施形態と共通する部分に同一の符号を付して、その説明を割愛する。 In the bearing seal 8 of the present embodiment, the seal lips 121, 122, and 123 all come into contact with the support member 90 in a state where the tip portions thereof face the infiltration direction of muddy water or the like, so that the muddy water or the like enters from the outside. Accurately prevent. On the other hand, on the bearing space S side, the labyrinth r2 is formed by the inner diameter side end portion 94a of the inner diameter side annular portion 94 and the wall break portion 4bb due to the step portion 4ba and the step portion 4ba, so that the labyrinth r2 is formed in the bearing space S. Leakage of the filled lubricant to the outside is also prevented. Further, since the inner diameter side end portion 94a of the inner diameter side annular portion 94 faces the recess due to the step portion 4ba, even if the internal pressure of the bearing space S increases, the seal lips 121, 122, 123 The direct influence of the internal pressure is blocked by the inner ring portion 94.
Since the other configurations are the same as those of the fourth embodiment, the same reference numerals are given to the parts common to the fourth embodiment, and the description thereof will be omitted.

図７は第六の実施形態の密封装置を示している。本実施形態の密封装置としてのベアリングシール８は、第一〜第三の実施形態と同様に、車体側内輪４の外周面４ｂが第四の実施形態に示すような段差部４ｂａを有しないハブベアリング１に装着される。そして、本実施形態のベアリングシール８は、金属環１１における金属環円筒部１１１の車輪側他端部１１１ｂから外径側に延びる円輪状の堰部１１３を有している。この堰部１１３は、その外径側部分が、エンコーダ９を構成する支持部材９０における内径側円輪部９４より車輪側に位置し、且つ、内径側円輪部９４の内径側端部９４ａに近接して軸Ｌ方向に重なるように形成されている。この重なり部分にラビリンスｒ３が形成される。 FIG. 7 shows the sealing device of the sixth embodiment. The bearing seal 8 as the sealing device of the present embodiment is a hub in which the outer peripheral surface 4b of the vehicle body side inner ring 4 does not have the stepped portion 4ba as shown in the fourth embodiment, as in the first to third embodiments. It is mounted on the bearing 1. The bearing seal 8 of the present embodiment has a ring-shaped weir portion 113 extending from the wheel-side other end portion 111b of the metal ring cylindrical portion 111 of the metal ring 11 to the outer diameter side. The outer diameter side portion of the weir portion 113 is located on the wheel side of the inner diameter side annular portion 94 of the support member 90 constituting the encoder 9, and is located at the inner diameter side end portion 94a of the inner diameter side annular portion 94. It is formed so as to be close to each other and overlap in the axis L direction. Labyrinth r3 is formed in this overlapping portion.

本実施形態のベアリングシール８において、軸受空間Ｓ側には、内径側円輪部９４の内径側端部９４ａと堰部１１３との重なり部分によってラビリンスｒ３が形成されるから、軸受空間Ｓ内に充填される潤滑剤の外部漏出が防止される。また、内径側円輪部９４の内径側端部９４ａと堰部１１３とがラビリンスｒ３を介して軸Ｌ方向に重なっているから、軸受空間Ｓの内圧によるシールリップ１２１，１２２，１２３に対する内圧の直接的な影響を及びにくくすることができる。
その他の構成は、第四の実施形態と同様であるので、第四の実施形態と共通する部分に同一の符号を付して、その説明を割愛する。 In the bearing seal 8 of the present embodiment, since the labyrinth r3 is formed on the bearing space S side by the overlapping portion of the inner diameter side end portion 94a of the inner diameter side annular portion 94 and the weir portion 113, the labyrinth r3 is formed in the bearing space S. External leakage of the filled lubricant is prevented. Further, since the inner diameter side end portion 94a of the inner diameter side annular portion 94 and the weir portion 113 overlap in the axial L direction via the labyrinth r3, the internal pressure on the seal lips 121, 122, 123 due to the internal pressure of the bearing space S is increased. It can reduce the direct influence.
Since the other configurations are the same as those of the fourth embodiment, the same reference numerals are given to the parts common to the fourth embodiment, and the description thereof will be omitted.

なお、実施形態ではシールリップの数が２個或いは３個の例について述べたが、その個数は仕様に応じて適宜設定される。また、シールリップがいずれもエンコーダ９を構成する支持部材９０に弾性的に接触する例につい述べたが、これに限らず弾性を伴わずに接触或いは近接する場合も除外されるものではない。さらにシールリップの形状も図例に限定されず、他の形状とすることは可能である。また、実施形態では、本発明に係る密封装置を、図１に示すような自動車の従動輪を回転自在に支持するハブベアリングに適用した例について述べたが、外輪回転で、ラジアルタイプの回転検出機構が構成される軸受装置であれば、他の形態の軸受装置にも好ましく採用される。加えて、第一、第二の実施形態における屈折部９５の形状を円筒状としたが、車体側に向け漸次縮径するテーパ形状とすることも可能である。 In the embodiment, an example in which the number of seal lips is two or three has been described, but the number is appropriately set according to the specifications. Further, although the example in which the seal lips are elastically in contact with the support member 90 constituting the encoder 9 has been described, the case where the seal lips are in contact with or close to each other without elasticity is not excluded. Further, the shape of the seal lip is not limited to the illustrated example, and other shapes can be used. Further, in the embodiment, an example in which the sealing device according to the present invention is applied to a hub bearing that rotatably supports a driven wheel of an automobile as shown in FIG. 1 has been described. However, a radial type rotation detection is performed by rotating the outer ring. Any bearing device having a mechanism is preferably used for bearing devices of other forms. In addition, although the shape of the refracting portion 95 in the first and second embodiments is cylindrical, it is also possible to have a tapered shape in which the diameter is gradually reduced toward the vehicle body side.

１ハブベアリング（軸受装置）
３，４内輪
６ハブ輪（外輪）
６ｃ内周面
６ｄ外周面
６ｅ車体側端面（軸方向端面）
８ベアリングシール（密封装置）
９エンコーダ
９１円筒部
９０支持部材
９１嵌合円筒部
９１ａ一端部
９１ｂ他端部
９２外径側円輪部
９２ａ外径側端部
９３外径側円筒部
９３ａ外周面
９４内径側円輪部
９５屈折部
９００環状磁石
９００ａ多極磁石（外周面）
１０シール部材
１１金属環
１１１金属環円筒部
１１１ａ一端部
１１２金属環円輪部
１２弾性シール部材
１２１，１２２，１２３シールリップ
Ｌ軸 1 Hub bearing (bearing device)
3, 4 Inner ring 6 Hub wheel (outer ring)
6c Inner peripheral surface 6d Outer peripheral surface 6e Vehicle side end surface (axial end surface)
8 Bearing seal (sealing device)
9 Encoder 91 Cylindrical part 90 Support member 91 Fitting cylindrical part 91a One end part 91b Other end part 92 Outer diameter side ring part 92a Outer diameter side end part 93 Outer diameter side cylindrical part 93a Outer peripheral surface 94 Inner diameter side ring part 95 Refraction Part 900 Circular magnet 900a Multipolar magnet (outer peripheral surface)
10 Sealing member 11 Metal ring 111 Metal ring Cylindrical part 111a One end 112 Metal ring ring part 12 Elastic sealing member 121, 122, 123 Seal lip L axis

Claims

A sealing device that seals between the inner ring and the outer ring of a bearing device having an inner ring and an outer ring coaxially supported by the inner ring.
It consists of an encoder and a seal member.
The encoder has a fitting cylindrical portion fitted to the inner peripheral surface of the outer ring, and one end portion of the fitting cylindrical portion facing the outward side in the axial direction in the bearing device on the outer diameter side of the outer peripheral surface of the outer ring. The outer diameter side cylindrical portion extending inward in the axial direction in the bearing device from the outer diameter side end portion of the outer diameter side annular portion, and the axial direction of the fitting cylindrical portion. It is composed of a support member including an inner diameter side annular portion extending in the inner diameter direction from the other end portion facing inward, and an annular magnet integrally provided on the outer peripheral surface of the outer diameter side cylindrical portion in the support member .
The outer diameter side cylindrical portion is arranged at a position away from the outer peripheral surface of the outer ring on the outer diameter side.
The sealing member includes a metal ring cylindrical portion fitted to the outer peripheral surface of the inner ring, a metal ring including a metal ring ring portion extending in the outer radial direction from one end of the metal ring cylindrical portion, and the metal ring. The elastic sealing member is integrally provided with the metal ring and has a sealing lip in contact with or close to the supporting member, and the elastic sealing member is a surface of the metal ring ring portion that faces outward in the axial direction of the bearing device. A sealing device characterized by covering the bearing.

In the sealing device according to claim 1,
A sealing device characterized in that the outer diameter side cylindrical portion is arranged so as to overlap the fitting cylindrical portion in the radial direction .

In the sealing device according to claim 1 or 2,
The plane height positions in the axial direction of the outer surface of the outer diameter side circular ring portion of the encoder on the outer side in the axial direction and the outer surface of the elastic seal member on the outer side in the axial direction are substantially equal to each other. A sealing device characterized by the fact that it is done.

In the sealing device according to any one of claims 1 to 3.
The sealing lip is formed so as to be in contact with or close to the inner diameter side annular portion and / or the fitting cylindrical portion .

In the sealing device according to any one of claims 1 to 4.
The sealing device, wherein the inner diameter side circular ring portion has a refracting portion .

In the sealing device according to any one of claims 1 to 5.
The annular magnet is made of a molded body of a rubber material containing magnetic powder, and the outer peripheral surface of the annular magnet is a multi-pole magnet in which a large number of N poles and S poles are alternately magnetized along the circumferential direction. A sealing device characterized by being magnetized.

In the sealing device according to any one of claims 1 to 6.
The sealing device, wherein the outer diameter side circular ring portion is formed along the axial end surface of the outer ring.