JP2016133155A

JP2016133155A - Sealing device

Info

Publication number: JP2016133155A
Application number: JP2015007507A
Authority: JP
Inventors: 正稚冨岡; Masawaka Tomioka; 健太郎大森; Kentaro Omori
Original assignee: Uchiyama Manufacturing Corp
Current assignee: Uchiyama Manufacturing Corp
Priority date: 2015-01-19
Filing date: 2015-01-19
Publication date: 2016-07-25
Anticipated expiration: 2035-01-19
Also published as: JP6586273B2

Abstract

PROBLEM TO BE SOLVED: To effectively suppress the rust development of an outer ring member in a hub bearing device at a vehicle body side end.SOLUTION: A sealing device 11 is used in an automobile hub bearing device 1, and comprises a slinger 12 which is fit to an inner ring member 5, a core grid 13 which is fit to an outer ring member 2, and a seal lip member 14 which is firmly fixed to the core grid 13. The slinger 12 has a cylinder part 121, and a flange part 122 which is continued to one end 121a of the cylinder part 121, the seal lip member 14 has a plurality of axial lips 141, 142, the core grid 13 has a core grid cylinder part 131, an inwardly-directed flange part 132 which is extended to the inside of a radial direction from one end 131a of the core grid cylinder part 13, and an outwardly-directed flange part 133 which is extended to the outside of the radial direction from the other end 131b of the core grid cylinder part 131, and an outside-diameter side end 133b of the outwardly-directed flange part 133 is entirely covered with a winding part 144 which is formed by the wraparound of an end of the seal lip member 144.SELECTED DRAWING: Figure 2

Description

本発明は、自動車用ハブ軸受装置に用いられる密封装置に関し、さらに詳しくは、外輪部材と内輪部材との間に装着される密封装置に関する。 The present invention relates to a sealing device used in a hub bearing device for an automobile, and more particularly to a sealing device mounted between an outer ring member and an inner ring member.

前記のような密封装置としては、前記内輪部材に嵌合されるスリンガと、前記外輪部材に嵌合される芯金と、該芯金に固着されるシールリップ部材とが組み合わさって前記外輪部材及び内輪部材間の車体側の隙間を密封する密封装置が多用されている。このような密封装置は、内輪部材と外輪部材とにより形成される環状空間（軸受空間）の軸方向に沿った車体側端部に装着される例が多く見られる（特許文献１〜４参照）。一方、前記軸受空間の軸方向に沿った車輪側端部には、前記スリンガを有さず、シールリップがハブフランジに直接又は間接的に弾接するよう構成された密封装置も多く用いられている（特許文献１〜４参照）。そして、車輪側の密封装置の場合、特許文献１，３においては、芯金が、外輪の内径部に嵌合される円筒部から外径側に延出された円板部（外向鍔部）を有し、この円板部を外輪の車輪側端面に当接させるようにした例も開示されている。また、車体側の密封装置の場合、特許文献４には、芯金に固着されたシール部材（シールリップ部材）が、外輪に内嵌される芯金から径方向外方に延びる外周リップを有し、この外周リップが外輪の車体側端面に当接するとともに、外輪とナックルとの隙間に嵌り込むように形成された例が開示されている。 As the sealing device as described above, the outer ring member is formed by combining a slinger fitted to the inner ring member, a core metal fitted to the outer ring member, and a seal lip member fixed to the core metal. And a sealing device for sealing a gap on the vehicle body side between the inner ring members is often used. Many examples of such a sealing device are attached to a vehicle body side end portion along an axial direction of an annular space (bearing space) formed by an inner ring member and an outer ring member (see Patent Documents 1 to 4). . On the other hand, a sealing device that does not have the slinger at the wheel side end along the axial direction of the bearing space and is configured so that the seal lip directly or indirectly elastically contacts the hub flange is also used. (See Patent Documents 1 to 4). And in the case of the wheel side sealing device, in Patent Documents 1 and 3, the core part is a disk part (outward flange part) extended from the cylindrical part fitted to the inner diameter part of the outer ring to the outer diameter side. There is also disclosed an example in which the disc portion is brought into contact with the wheel side end surface of the outer ring. In the case of a vehicle body side sealing device, Patent Document 4 discloses that a sealing member (seal lip member) fixed to a core metal has an outer peripheral lip extending radially outward from a core metal fitted in an outer ring. An example is disclosed in which the outer peripheral lip is in contact with the end surface of the outer ring on the vehicle body side and is fitted into the gap between the outer ring and the knuckle.

特開２００８−１６３９７８号公報JP 2008-163978 A 特開２０１１−１９６４５６号公報JP 2011-196456 A 特開２０１２−９７８１７号公報JP 2012-97817 A 特開２０１２−２０７７６９号公報JP 2012-207769 A

ところで、外輪部材の車輪側部分は泥水等に晒され易い部位であるが、特許文献２に示される軸受装置においては、外輪部材に対する泥水等の付着を防止する手段が講じられておらず、そのため、外輪部材の車輪側部分が錆び易くなる。このような錆の発生は、外輪部材と芯金の嵌合部にも及び、この嵌合部の嵌合強度を弱め、さらに、錆（腐食）が進行すると、錆びた部分が剥がれ飛散し、シールリップにダメージを与えることになるため、密封装置のシール機能が低下する要因となることもある。また、前記のような自動車用のハブ軸受装置においては、車輪をハブフランジから外したとき、外輪部材の車輪側部分が露見し、発錆した外輪の車輪側部分がユーザの目に晒され、見栄えが悪くなる。特許文献１及び特許文献３においては、外輪部材の車輪側端面が、芯金及び芯金に固着されたゴム材からなるシール部材で覆われている例が開示されており、この例の場合は、前記懸念が生じ難い。 By the way, the wheel side portion of the outer ring member is a part that is easily exposed to muddy water or the like. However, in the bearing device shown in Patent Document 2, there is no means for preventing adhesion of muddy water or the like to the outer ring member. The wheel side portion of the outer ring member is likely to rust. The occurrence of such rust also reaches the fitting part of the outer ring member and the core metal, weakens the fitting strength of this fitting part, and further, when rust (corrosion) proceeds, the rusted part peels off and scatters, Since the seal lip is damaged, the sealing function of the sealing device may be reduced. Further, in the hub bearing device for automobiles as described above, when the wheel is removed from the hub flange, the wheel side portion of the outer ring member is exposed, and the wheel side portion of the rusted outer ring is exposed to the user's eyes, It looks bad. In Patent Document 1 and Patent Document 3, an example is disclosed in which the wheel side end surface of the outer ring member is covered with a core metal and a seal member made of a rubber material fixed to the core metal. The concern is unlikely to arise.

一方、外輪部材の車体側部分に関しても、泥水等のアタックを受けるが、近年寒冷地等を走行する車が増えており、より発錆し易い環境となっているため、懸念が新たに生じることとなった。また、近時、自動車を高圧洗車することもあり、このような高圧洗車による噴射水が外輪部材の車体側部分にも及ぶことがあり、この部分の発錆の懸念も新たに生じることが予想される。 On the other hand, the vehicle body side portion of the outer ring member is also subjected to attacks such as muddy water, but recently, an increasing number of vehicles traveling in cold districts and the like are becoming more susceptible to rusting, so new concerns arise. It became. In addition, recently, automobiles may be washed with high pressure, and the water sprayed by such high pressure washing may reach the vehicle body side portion of the outer ring member. Is done.

本発明は、上記実情に鑑みなされたものであり、自動車用ハブ軸受装置における外輪部材の車体側端部の発錆を効果的に抑制することができる新規な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 an object of the present invention is to provide a novel sealing device capable of effectively suppressing rusting at the vehicle body side end portion of the outer ring member in the automotive hub bearing device. Yes.

本発明に係る密封装置は、金属製の外輪部材と、該外輪部材に対して同軸回転可能に支持される内輪部材とを備える自動車用ハブ軸受装置に用いられ、前記内輪部材に嵌合されるスリンガと、前記外輪部材に嵌合される芯金と、該芯金に固着されたシールリップ部材とが組み合わさって前記外輪部材及び内輪部材間の車体側の隙間を密封する密封装置であって、前記スリンガは、前記内輪部材に嵌合される円筒部と、該円筒部の一端部に連成されたフランジ部とを有し、前記シールリップ部材は、前記フランジ部に弾接する複数のアキシャルリップを有し、前記芯金は、前記外輪部材に嵌合される芯金円筒部と、該芯金円筒部の一端部から径方向内側に延出形成された内向鍔部と、該芯金円筒部の他端部から前記外輪部材の車体側の端面を覆うように径方向外側に延出形成された外向鍔部とを有し、前記外向鍔部の外径側端部は、前記シールリップ部材の端部が回り込んで形成された巻き部で一体に覆われていることを特徴とする。 A sealing device according to the present invention is used in an automotive hub bearing device including a metal outer ring member and an inner ring member supported so as to be coaxially rotatable with respect to the outer ring member, and is fitted to the inner ring member. A sealing device that seals a gap on the vehicle body side between the outer ring member and the inner ring member by combining a slinger, a metal core fitted to the outer ring member, and a seal lip member fixed to the metal core. The slinger has a cylindrical portion that is fitted to the inner ring member, and a flange portion that is coupled to one end portion of the cylindrical portion, and the seal lip member is a plurality of axial members that elastically contact the flange portion. The cored bar has a lip, the cored bar cylindrical part fitted to the outer ring member, an inward flange part extending radially inward from one end of the cored bar cylindrical part, and the cored bar Cover the end surface of the outer ring member on the vehicle body side from the other end of the cylindrical portion. The outer flange portion extending outward in the radial direction as described above, and the outer diameter side end portion of the outer flange portion is integrally formed by a winding portion formed by the end portion of the seal lip member wrapping around. It is characterized by being covered.

本発明の密封装置によれば、シールリップ部材がスリンガのフランジ部に弾接する複数のアキシャルリップを有しているから、外部から前記車体側の隙間を経て外輪部材及び内輪部材間の軸受空間内への泥水等の浸入が防止される。また、芯金の外向鍔部が外輪部材の車体側端面を覆うように形成され、しかも、外向鍔部の外径側端部は、前記シールリップ部材の端部が回り込んで形成された巻き部で一体に覆われているから、外輪部材の車体側端面が泥水等や噴射水に晒されず、この部分の発錆が抑制され、また、見栄えが低下することも抑制される。 According to the sealing device of the present invention, since the seal lip member has a plurality of axial lips that elastically contact the flange portion of the slinger, the inside of the bearing space between the outer ring member and the inner ring member passes through the gap on the vehicle body side from the outside. Intrusion of muddy water, etc. is prevented. Further, the outer flange portion of the metal core is formed so as to cover the end surface of the outer ring member on the vehicle body side, and the outer diameter side end portion of the outer flange portion is wound around the end portion of the seal lip member. Since the vehicle body side end surface of the outer ring member is not exposed to muddy water or jet water, the rusting of this portion is suppressed, and the appearance is also prevented from being deteriorated.

本発明の密封装置において、前記巻き部は、前記外輪部材の前記車体側端面に圧縮状態で弾接する環状の突条部を有しているものとしても良い。
本発明の密封装置によれば、巻き部と環状の突条部とにより、外輪部材の車体側端面が泥水等に晒されることがより確実に防止され、外輪部材の車体側端面の発錆の懸念がより少なくなる。 In the sealing device of the present invention, the winding portion may have an annular ridge portion that elastically contacts the end surface of the outer ring member on the vehicle body side in a compressed state.
According to the sealing device of the present invention, the winding portion and the annular ridge portion more reliably prevent the vehicle body side end surface of the outer ring member from being exposed to muddy water, and the like. There are fewer concerns.

本発明の密封装置において、前記巻き部は、前記外輪部材の外周面よりも外径側に突出する突部を有しているものとしても良い。
本発明の密封装置によれば、外輪部材がナックルハウジングに内嵌支持される場合、突部が芯金の外向鍔部の外径側端部とナックルハウジングの内周面との間に圧縮状態で介在することになるから、外輪部材とナックルハウジングとの嵌合部への泥水等の浸入が防止される。したがって、外輪部材とナックルハウジングとの嵌合部の発錆等も防止される。 In the sealing device according to the aspect of the invention, the winding portion may have a protrusion that protrudes to the outer diameter side from the outer peripheral surface of the outer ring member.
According to the sealing device of the present invention, when the outer ring member is fitted and supported by the knuckle housing, the projecting portion is compressed between the outer diameter side end portion of the outward flange portion of the core metal and the inner peripheral surface of the knuckle housing. Therefore, intrusion of muddy water or the like into the fitting portion between the outer ring member and the knuckle housing is prevented. Therefore, rusting or the like of the fitting portion between the outer ring member and the knuckle housing is also prevented.

本発明の密封装置において、前記芯金は、前記外向鍔部の外径側端部から軸方向に沿って車体側に延出された外径側円筒部を有し、前記シールリップ部材は前記外径側円筒部の延出端を回り込むよう当該外径側円筒部を覆い前記巻き部に連続するように形成されているものとしても良い。
本発明の密封装置によれば、外径側円筒部とこれを覆うシールリップ部材とが車体側に向け庇状に突出することになるから、外輪部材の車体側端部に対する泥水等のアタックがより効果的に防止され、外輪部材における車体側端部の発錆の抑制がより確実になされる。また、密封装置内への泥水等の実質的な浸入経路が長くなり、当該密封装置のシール機能がより効果的に発揮される。 In the sealing device of the present invention, the core metal has an outer diameter side cylindrical portion that extends from the outer diameter side end portion of the outward flange portion toward the vehicle body along the axial direction, and the seal lip member includes the seal lip member It is good also as what is formed so that the said outer diameter side cylindrical part may be covered so that it may go around the extension end of an outer diameter side cylindrical part, and the said winding part may be continued.
According to the sealing device of the present invention, since the outer diameter side cylindrical portion and the seal lip member covering the outer cylindrical portion project in a bowl shape toward the vehicle body side, an attack such as muddy water against the vehicle body side end portion of the outer ring member is performed. It is prevented more effectively, and the rusting of the vehicle body side end portion of the outer ring member is more reliably suppressed. Moreover, the substantial infiltration path of muddy water or the like into the sealing device is lengthened, and the sealing function of the sealing device is more effectively exhibited.

本発明の密封装置において、前記巻き部は、前記外向鍔部の外径側端部から軸方向に沿って車体側に向け延出された円筒状庇状部を有しているものとしても良い。
本発明の密封装置によれば、円筒状庇状部によって、外輪部材の車体側端部に対する泥水等のアタックがより効果的に防止され、外輪部材における車体側端部の発錆の抑制がより確実になされる。また、密封装置内への泥水等の実質的な浸入経路が長くなり、当該密封装置のシール機能がより効果的に発揮される。 In the sealing device according to the aspect of the invention, the winding portion may include a cylindrical hook-like portion that extends from the outer diameter side end portion of the outward hook portion toward the vehicle body along the axial direction. .
According to the sealing device of the present invention, the cylindrical bowl-shaped portion more effectively prevents the attack of muddy water and the like on the vehicle body side end portion of the outer ring member, and further suppresses rusting on the vehicle body side end portion of the outer ring member. Certainly done. Moreover, the substantial infiltration path of muddy water or the like into the sealing device is lengthened, and the sealing function of the sealing device is more effectively exhibited.

本発明の密封装置によれば、自動車用ハブ軸受装置の外輪部材と内輪部材とにより形成される軸受空間の車体側部の密封が的確になされるとともに、外輪部材の車体側端部の発錆を効果的に抑制することができる。 According to the sealing device of the present invention, the vehicle body side portion of the bearing space formed by the outer ring member and the inner ring member of the automotive hub bearing device is accurately sealed, and the rusting of the vehicle body side end portion of the outer ring member is achieved. Can be effectively suppressed.

本発明に係る密封装置が適用される自動車用ハブ軸受装置の一例を示す概略的縦断面図である。It is a schematic longitudinal cross-sectional view which shows an example of the hub bearing apparatus for motor vehicles to which the sealing device which concerns on this invention is applied. 図１のＸ部の拡大図であって、本発明に係る密封装置の第一の実施形態を示す図である。It is an enlarged view of the X section of Drawing 1, and is a figure showing a first embodiment of a sealing device concerning the present invention. 本発明に係る密封装置の第二の実施形態を示す図２と同様図である。It is a figure similar to FIG. 2 which shows 2nd embodiment of the sealing device which concerns on this invention. 本発明に係る密封装置の第三の実施形態を示す図２と同様図である。It is a figure similar to FIG. 2 which shows 3rd embodiment of the sealing device which concerns on this invention. 本発明に係る密封装置の第四の実施形態を示す図２と同様図である。It is a figure similar to FIG. 2 which shows 4th embodiment of the sealing device which concerns on this invention. 本発明に係る密封装置の第五の実施形態を示す図２と同様図である。It is a figure similar to FIG. 2 which shows 5th embodiment of the sealing device which concerns on this invention. 第一の実施形態の変形例を示す図２と同様図である。It is a figure similar to FIG. 2 which shows the modification of 1st embodiment. 第一の実施形態の別の変形例を示す図２と同様図である。It is a figure similar to FIG. 2 which shows another modification of 1st embodiment.

以下、本発明の実施の形態について、図面に基づいて説明する。図１は、自動車の車輪（不図示）を軸回転可能に支持する自動車用ハブ軸受装置１を示す。この自動車用ハブ軸受装置１は、大略的に、外輪部材２と、ハブ輪３と、ハブ輪３の車体側に嵌合一体とされる内輪４と、外輪部材２とハブ輪３及び内輪４との間に介装される２列の転動体（ボール）６…とを含んで構成される。この例では、ハブ輪３及び内輪４が内輪部材５を構成する。外輪部材２は、自動車の車体（不図示）に固定される。また、ハブ輪３にはドライブシャフト７が同軸的にスプライン嵌合され、ドライブシャフト７は等速ジョイント８を介して不図示の駆動源（駆動伝達部）に連結される。ドライブシャフト７はナット９によって、ハブ輪３と一体化され、ハブ輪３のドライブシャフト７からの抜脱が防止されている。内輪部材５（ハブ輪３及び内輪４）は、外輪部材２に対して、軸Ｌ回りに同軸回転可能とされ、外輪部材２と、内輪部材５とにより、相対的に回転する２部材が構成され、該２部材間に環状空間Ｓが形成される。環状空間Ｓ内には、２列の転動体６…が、リテーナ６ａに保持された状態で、外輪部材２の軌道輪２ａ、ハブ輪３及び内輪４の軌道輪３ａ，４ａを転動可能に介装されている。ハブ輪３は、円筒形状のハブ輪本体３０と、ハブ輪本体３０より立上基部３１を介して径方向外側に延出するよう形成されたハブフランジ３２とを有し、ハブフランジ３２にボルト３３及び不図示のナットによって車輪が取付固定される。以下において、軸Ｌ方向に沿って車輪に向く側（図１において左側を向く側）を車輪側、車体に向く側（同右側を向く側）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 automobile hub bearing device 1 that supports a wheel (not shown) of an automobile so as to be rotatable. This automotive hub bearing device 1 is roughly composed of an outer ring member 2, a hub ring 3, an inner ring 4 fitted and integrated with the body of the hub ring 3, an outer ring member 2, a hub ring 3 and an inner ring 4. And two rows of rolling elements (balls) 6 interposed therebetween. In this example, the hub ring 3 and the inner ring 4 constitute an inner ring member 5. The outer ring member 2 is fixed to a vehicle body (not shown) of the automobile. A drive shaft 7 is coaxially spline-fitted to the hub wheel 3, and the drive shaft 7 is connected to a drive source (drive transmission unit) (not shown) via a constant velocity joint 8. The drive shaft 7 is integrated with the hub wheel 3 by a nut 9 to prevent the hub wheel 3 from being detached from the drive shaft 7. The inner ring member 5 (the hub ring 3 and the inner ring 4) can be coaxially rotated around the axis L with respect to the outer ring member 2, and the outer ring member 2 and the inner ring member 5 constitute two members that rotate relatively. An annular space S is formed between the two members. In the annular space S, two rows of rolling elements 6... Can roll on the race rings 2 a of the outer ring member 2, the hub ring 3, and the race rings 3 a and 4 a of the inner ring 4 while being held by the retainer 6 a. It is intervened. The hub wheel 3 includes a cylindrical hub wheel body 30 and a hub flange 32 formed so as to extend radially outward from the hub wheel body 30 through a rising base 31. The wheel is attached and fixed by 33 and a nut (not shown). In the following, the side facing the wheel along the axis L direction (the side facing the left side in FIG. 1) is referred to as the wheel side, and the side facing the vehicle body (the side facing the right side) is referred to as the vehicle body side.

環状空間Ｓは、軸受空間を形成し、この環状空間（以下、軸受空間と言う）Ｓの軸Ｌ方向に沿った両端部であって、外輪部材２及びハブ輪３（内輪部材５）間の隙間Ｓ０と、外輪部材２及び内輪４（内輪部材５）間の隙間Ｓ１には、ベアリングシール１０，１１がそれぞれ装着され、軸受空間Ｓの軸Ｌ方向に沿った両端部が密封される。これによって、軸受空間Ｓ内への泥水等の浸入や軸受空間Ｓ内に充填される潤滑剤（グリース等）の外部への漏出が防止される。図例のような自動車用ハブ軸受装置１の外輪部材２及び内輪部材５には、加工性等の点でステンレス鋼のような不錆性金属材が用いられることは少なく、一般に泥水等に晒されると錆び易い金属材が用いられる。 The annular space S forms a bearing space, and is an end portion along the axis L direction of the annular space (hereinafter referred to as a bearing space) S, and between the outer ring member 2 and the hub ring 3 (inner ring member 5). Bearing seals 10 and 11 are respectively mounted in the gap S0 and the gap S1 between the outer ring member 2 and the inner ring 4 (inner ring member 5), and both ends of the bearing space S along the axis L direction are sealed. This prevents intrusion of muddy water or the like into the bearing space S and leakage of the lubricant (grease or the like) filled in the bearing space S to the outside. The outer ring member 2 and the inner ring member 5 of the hub bearing device 1 for an automobile as shown in the figure are rarely made of a rust-resistant metal material such as stainless steel in terms of workability and are generally exposed to muddy water. Metal material that easily rusts is used.

ベアリングシール１０，１１のうち、車体側のベアリングシール１１が本発明に係る密封装置に相当する。本発明に係る密封装置の実施の形態について、図２〜図８をも参照して説明する。図２は本発明に係る密封装置の第一の実施形態を示し、本実施形態のベアリングシール（密封装置）１１は、外輪部材２と内輪部材５とを有する軸受装置１に装着される。当該ベアリングシール１１は、内輪部材５（内輪４）に外嵌されるスリンガ１２と、外輪２に内嵌される芯金１３と、芯金１３に固着されたシールリップ部材１４とが組み合わさって構成される。スリンガ１２は、内輪４の外径面４ｂに外嵌される円筒部１２１と、円筒部１２１の車体側端部（一端部）１２１ａから外径側に連成されたフランジ部１２２とを有している。シールリップ部材１４は、スリンガ１２におけるフランジ部１２２の車輪側面１２２ａに弾接する２個のアキシャルリップ１４１，１４２と、円筒部１２１の外径面１２１ｂに弾接する１個のラジアルリップ１４３とを有している。アキシャルリップ１４１，１４２及びラジアルリップ１４３の２点鎖線で示す部分は、弾接に伴う弾性変形前の原形状を示している。芯金１３は、外輪部材２の内径面２ｂに内嵌される芯金円筒部１３１と、芯金円筒部１３１の車輪側端部（一端部）１３１ａから径方向内側に延出形成された内向鍔部１３２と、芯金円筒部の車体側端部（他端部）１３２ｂから外輪部材２の車体側の端面２ｃを覆うように径方向外側に延出形成された外向鍔部１３３とを有している。 Of the bearing seals 10 and 11, the bearing seal 11 on the vehicle body side corresponds to the sealing device according to the present invention. An embodiment of a sealing device according to the present invention will be described with reference to FIGS. FIG. 2 shows a first embodiment of a sealing device according to the present invention. A bearing seal (sealing device) 11 of this embodiment is mounted on a bearing device 1 having an outer ring member 2 and an inner ring member 5. The bearing seal 11 is a combination of a slinger 12 fitted to the inner ring member 5 (inner ring 4), a core bar 13 fitted to the outer ring 2, and a seal lip member 14 fixed to the core bar 13. Composed. The slinger 12 has a cylindrical portion 121 that is fitted onto the outer diameter surface 4b of the inner ring 4, and a flange portion 122 that is coupled to the outer diameter side from the vehicle body side end portion (one end portion) 121a of the cylindrical portion 121. ing. The seal lip member 14 includes two axial lips 141 and 142 that elastically contact the wheel side surface 122 a of the flange portion 122 of the slinger 12, and one radial lip 143 that elastically contacts the outer diameter surface 121 b of the cylindrical portion 121. ing. The portions indicated by the two-dot chain lines of the axial lips 141 and 142 and the radial lip 143 indicate the original shape before elastic deformation accompanying elastic contact. The cored bar 13 is a cored bar cylindrical part 131 fitted into the inner diameter surface 2b of the outer ring member 2, and an inwardly extending inwardly from the wheel side end part (one end part) 131a of the cored bar cylindrical part 131. There is a flange portion 132 and an outward flange portion 133 that is formed so as to extend radially outward so as to cover the end surface 2c on the vehicle body side of the outer ring member 2 from the vehicle body side end portion (other end portion) 132b of the cored bar cylindrical portion. doing.

シールリップ部材１４はゴム材からなり、芯金１３の後記する部位にシールリップ基部１４０を介して加硫成型により一体に固着される。シールリップ基部１４０は、芯金１３における内向鍔部１３２の車輪側面１３２ａの一部から内径側端部１３２ｂを回り込み車体側面１３２ｃの全体を覆うように芯金に固着一体とされる。シールリップ基部１４０は、さらに連続して、芯金円筒部１３１の内周面１３１ｃから外向鍔部１３３の車体側面１３３ａを覆い、これに連続して、外向鍔部１３３の外径側端部１３３ｂを回り込むように芯金１３に固着一体とされる。アキシャルリップ１４１，１４２及びラジアルリップ１４３は、このシールリップ基部１４０からそれぞれスリンガ１２のフランジ部１２２及び円筒部１２１に向け延出されるよう環状に形成されている。また、シールリップ基部１４０の外径側端部（シールリップ部材１４の端部）は、前記のように外向鍔部１３３の外径側端部１３３ｂを回り込んで、外向鍔部１３３の車輪側面１３３ｃに及んで一体に形成された巻き部１４４とされている。巻き部１４４における外向鍔部１３３の車輪側面１３３ｃに及ぶ回り込み部１４４ａは、芯金１３の外輪部材２に対する嵌合状態では、外向鍔部１３の車輪側面１３３ｃと外輪部材２の車体側面２ｃとの間に圧縮状態で介在する。また、シールリップ基部１４０における外向鍔部１３３の車輪側面１３３ａを覆う部分の表面１４０ａには、図示を省略するが、当該ベアリングシール１１の品番、製造元等の情報（不図示）が刻印される。このような刻印は、シールリップ部材１４の芯金１３に対する加硫成型の際に金型によって同時に附されるもので、以下で述べる他の実施形態のベアリングシール１１にも適用可能である。 The seal lip member 14 is made of a rubber material, and is integrally fixed to a portion to be described later of the core bar 13 through a seal lip base 140 by vulcanization molding. The seal lip base portion 140 is fixedly integrated with the core metal so as to go around the inner diameter side end portion 132b from a part of the wheel side surface 132a of the inward flange portion 132 of the core metal 13 and cover the entire body side surface 132c. The seal lip base portion 140 further continuously covers the vehicle body side surface 133a of the outward flange portion 133 from the inner peripheral surface 131c of the cored bar cylindrical portion 131, and continues to the outer diameter side end portion 133b of the outward flange portion 133. Is integrally fixed to the core bar 13 so as to go around. The axial lips 141 and 142 and the radial lip 143 are formed in an annular shape so as to extend from the seal lip base portion 140 toward the flange portion 122 and the cylindrical portion 121 of the slinger 12, respectively. Further, the outer diameter side end portion (end portion of the seal lip member 14) of the seal lip base portion 140 wraps around the outer diameter side end portion 133b of the outward flange portion 133 as described above, and the wheel side surface of the outward flange portion 133 is. The winding portion 144 is formed integrally with the portion 133c. The wrap-around portion 144a that extends to the wheel side surface 133c of the outward flange portion 133 in the winding portion 144 is between the wheel side surface 133c of the outward flange portion 13 and the vehicle body side surface 2c of the outer ring member 2 when the cored bar 13 is fitted to the outer ring member 2. Intervene in a compressed state. Further, on the surface 140a of the portion of the seal lip base 140 that covers the wheel side surface 133a of the outward flange 133, information (not shown) such as the product number and manufacturer of the bearing seal 11 is imprinted. Such engraving is applied at the same time by a mold when the seal lip member 14 is vulcanized and molded to the core metal 13, and can also be applied to the bearing seal 11 of other embodiments described below.

本実施形態のベアリングシール１１においては、スリンガ１２におけるフランジ部１２２の車体側面１２２ｂに、磁性粉を含むゴム材からなる磁気エンコーダ１５が、加硫接着により固着一体とされている。磁気エンコーダ１５は、その車体側面１５ａに、周方向に沿って多数のＮ極、Ｓ極が交互に着磁されている。車体（不図示）には磁気センサ１６が磁気エンコーダ１５に対峙するよう設置され、磁気エンコーダ１５の回転に伴う磁気変化を磁気センサ１６により検出することにより、ドライブシャフト７（車輪）の回転検出機構が構成される。 In the bearing seal 11 of the present embodiment, a magnetic encoder 15 made of a rubber material containing magnetic powder is fixedly integrated with a vehicle body side surface 122b of the flange portion 122 of the slinger 12 by vulcanization adhesion. The magnetic encoder 15 has a number of N poles and S poles alternately magnetized along the circumferential direction on the side surface 15a of the vehicle body. A magnetic sensor 16 is installed on the vehicle body (not shown) so as to face the magnetic encoder 15, and a magnetic change accompanying the rotation of the magnetic encoder 15 is detected by the magnetic sensor 16, thereby detecting the rotation of the drive shaft 7 (wheel). Is configured.

前記のように構成されるベアリングシール１１が組み込まれた自動車用ハブ軸受装置１において、ドライブシャフト７が軸Ｌの回りに回転すると、内輪部材５は外輪部材２に対してドライブシャフト７と一体で同軸回転する。この時、アキシャルリップ１４１，１４２及びラジアルリップ１４３は、それぞれ、スリンガ１２のフランジ部１２２及び円筒部１２１に弾接した状態で相対摺接する。したがって、軸受装置１の稼働中、外部からベアリングシール１１を経て車体側からの軸受空間Ｓ内への泥水等の浸入が防止される。また、軸受空間Ｓ内に充填されている潤滑剤（グリース等）の車体側における軸受装置１外への漏出が防止される。そして、外輪部材２の車体側端面２ｃは、芯金１３の外向鍔部１３３及びシールリップ部材１４のシールリップ基部１４０によって覆われているから、泥水等のアタックを受けず、発錆の懸念がない。しかも、巻き部１４４の回り込み部１４４ａが、外輪部材２の車体側端面２ｃと外向鍔部１３３の車輪側面１３３ｃとの間に圧縮状態で介在するから、外輪部材２の車体側端面２ｃと外向鍔部１３３の車輪側面１３３ｃとの間に泥水等が浸入することがない。加えて、巻き部１４４を含んでシールリップ基部１４０が芯金１３に一体に固着されているから、高圧洗車による噴射水に晒されても巻き部１４４を含むシールリップ基部１４０がめくり上がり或いは破断することがなく、外輪部材２の車体側端面２ｃが芯金１３及びシールリップ基部１４０によって覆われた状態に長く維持される。これによって、外輪部材２の車体側端面２ｃの発錆が抑制され、また、見栄えが低下することも抑制される。さらに、外輪部材２と芯金１３との嵌合部に錆が進行することも抑制される。このように外輪部材２の車体側端面２ｃの発錆や前記嵌合部への錆の進行が抑制されることにより、錆びた部分が剥がれて飛散し、アキシャルリップ１４１，１４２等にダメージを与えるようなことも生じ難くなる。さらに、外向鍔部１３３が回り込み部１４４ａを介して外輪部材２の車体側端面２ｃと密着することにより、外輪部材２と芯金１３との間における泥水等の浸入経路が実質的に長くなり、この部分を経た軸受空間Ｓ内への錆の進行が遅くなる。 In the automotive hub bearing device 1 in which the bearing seal 11 configured as described above is incorporated, when the drive shaft 7 rotates about the axis L, the inner ring member 5 is integrated with the drive shaft 7 with respect to the outer ring member 2. It rotates coaxially. At this time, the axial lips 141 and 142 and the radial lip 143 are in relative sliding contact with the flange portion 122 and the cylindrical portion 121 of the slinger 12 in a state of elastic contact. Therefore, intrusion of muddy water or the like into the bearing space S from the vehicle body side through the bearing seal 11 from the outside is prevented during operation of the bearing device 1. Further, the lubricant (grease and the like) filled in the bearing space S is prevented from leaking out of the bearing device 1 on the vehicle body side. And since the vehicle body side end surface 2c of the outer ring member 2 is covered by the outward flange portion 133 of the core metal 13 and the seal lip base portion 140 of the seal lip member 14, there is no risk of rusting due to the attack of muddy water or the like. Absent. Moreover, since the wrap-around portion 144a of the winding portion 144 is interposed in a compressed state between the vehicle body side end surface 2c of the outer ring member 2 and the wheel side surface 133c of the outward flange portion 133, the vehicle body side end surface 2c of the outer ring member 2 and the outward flange Muddy water or the like does not enter between the wheel side surface 133c of the portion 133. In addition, since the seal lip base 140 including the winding portion 144 is integrally fixed to the core metal 13, the seal lip base 140 including the winding portion 144 is turned up or broken even when exposed to the jet water from the high pressure car wash. Therefore, the end face 2c on the vehicle body side of the outer ring member 2 is kept long so as to be covered with the core metal 13 and the seal lip base 140. Thereby, the rusting of the vehicle body side end surface 2c of the outer ring member 2 is suppressed, and the appearance is also prevented from being deteriorated. Furthermore, the progress of rust in the fitting portion between the outer ring member 2 and the cored bar 13 is also suppressed. In this way, the rusting of the vehicle body side end surface 2c of the outer ring member 2 and the progress of rusting to the fitting portion are suppressed, so that the rusted portion is peeled off and scattered, thereby damaging the axial lips 141, 142 and the like. Such a thing becomes difficult to occur. Furthermore, when the outward flange part 133 is in close contact with the vehicle body side end surface 2c of the outer ring member 2 via the wraparound part 144a, the infiltration path of muddy water or the like between the outer ring member 2 and the cored bar 13 is substantially lengthened. The progress of rust into the bearing space S through this portion is delayed.

本実施形態において、シールリップ基部１４０の最外径（巻き部１４４の外径）ｄと、外輪２の外径ｄ１との関係が、ｄ＝ｄ１±５ｍｍとなるように設計されることが望ましい。また、外輪部材２の車体側端面２ｃと外向鍔部１３３の車輪側面１３３ｃとの間に介在する回り込み部１４４ａの圧縮前の厚みｄ２は、０．３０〜０．４０ｍｍ程度に設定される。ｄ２が０．３０ｍｍより小さい場合は、外輪部材２の荷重変形に伴い芯金１３の外向鍔部１３３が外輪部材２の車体側端面２ｃから離れるように変形することがあり、そのため外輪部材２の車体側端面２ｃとの密着性が悪くなり、この部分のシール性が低下する傾向となるからである。また、ｄ２が０．４０ｍｍより大きい場合、シールリップ基部１４０の前記表面１４０ａに工具を宛がい、芯金１３をシールリップ基部１４０とともに外輪部材２の内径面２ｂに圧入嵌合させる際、圧入力の一部が回り込み部１４４ａに吸収され、圧入が充分になされなくことが懸念されるからである。さらに、シールリップ基部１４０における外向鍔部１３３の車体側面１３３ａを覆う部分の厚みｄ３は、０．２５〜０．８０ｍｍ程度に設定される。ｄ３が０．２５ｍｍより小さい場合は、前記圧入時にこの部分の外輪部材２の荷重変形に伴い、この部分のシールリップ基部１４０が破断する恐れが生じるからである。また、ｄ３が０．８０ｍｍより大きい場合、前記圧入時に、圧入力の一部がシールリップ基部１４０に吸収され、圧入が充分になされなくことが懸念されるからである。 In the present embodiment, it is desirable that the relationship between the outermost diameter (outer diameter of the winding portion 144) d of the seal lip base portion 140 and the outer diameter d1 of the outer ring 2 is d = d1 ± 5 mm. . In addition, the thickness d2 before compression of the sneak portion 144a interposed between the vehicle body side end surface 2c of the outer ring member 2 and the wheel side surface 133c of the outward flange portion 133 is set to about 0.30 to 0.40 mm. When d2 is smaller than 0.30 mm, the outward flange portion 133 of the core metal 13 may be deformed so as to be separated from the vehicle body side end surface 2c of the outer ring member 2 along with the load deformation of the outer ring member 2. This is because the adhesion with the vehicle body side end surface 2c is deteriorated, and the sealing performance of this portion tends to be lowered. When d2 is larger than 0.40 mm, a tool is applied to the surface 140a of the seal lip base 140, and when the core metal 13 is press-fitted into the inner surface 2b of the outer ring member 2 together with the seal lip base 140, pressure input is performed. This is because a part of the water is absorbed by the wraparound portion 144a and there is a concern that the press-fitting is not sufficiently performed. Furthermore, the thickness d3 of the part which covers the vehicle body side surface 133a of the outward flange part 133 in the seal lip base part 140 is set to about 0.25 to 0.80 mm. If d3 is smaller than 0.25 mm, the seal lip base 140 in this portion may be broken due to the load deformation of the outer ring member 2 in this portion during the press-fitting. Further, when d3 is larger than 0.80 mm, there is a concern that a part of the pressure input is absorbed by the seal lip base 140 during the press-fitting and the press-fitting is not sufficiently performed.

図３は本発明に係る密封装置の第二の実施形態を示す。本実施形態のベアリングシール（密封装置）１１では、芯金１３における外向鍔部１３３が途中から外径側端部１３３ｂに至る薄肉部１３３ｄを有している。この薄肉部１３３ｄは車輪側面１３３ｃが車体側に凹むよう段差状に形成されている。シールリップ部材１４における巻き部１４４の回り込み部１４４ａは、この薄肉部１３３ｄと外輪部材２の車体側端面２ｃとの間に介在するよう形成され、さらに、回り込み部１４４ａは外輪部材２の車体側端面２ｃに弾接する環状の突条部１４４ｂを車体側端面２ｃに対向するように有している。芯金１３の外輪部材２に対する嵌合状態では、この突条部１４４ｂが回り込み部１４４ａとともに外向鍔部１３３の薄肉部１３３ｄと外輪部材２の車体側端面２ｃとの間に圧縮状態で介在する。図３における２点鎖線で示す突条部１４４ｂは、圧縮変形前の原形状を示す。また、この嵌合状態では、薄肉部１３３ｄを除く外向鍔部１３３の車輪側面１３３ｃは、外輪部材２の車体側端面２ｃに当接する。 FIG. 3 shows a second embodiment of the sealing device according to the present invention. In the bearing seal (sealing device) 11 of the present embodiment, the outward flange portion 133 of the core metal 13 has a thin portion 133d extending from the middle to the outer diameter side end portion 133b. The thin wall portion 133d is formed in a stepped shape so that the wheel side surface 133c is recessed toward the vehicle body. The wrap-around portion 144a of the winding portion 144 in the seal lip member 14 is formed so as to be interposed between the thin portion 133d and the vehicle body side end surface 2c of the outer ring member 2, and the wraparound portion 144a is the vehicle body side end surface of the outer ring member 2. An annular protrusion 144b elastically contacting 2c is provided so as to face the vehicle body side end surface 2c. In a state where the core bar 13 is fitted to the outer ring member 2, the protruding portion 144 b is interposed in a compressed state between the thinned portion 133 d of the outward flange portion 133 and the end surface 2 c of the outer ring member 2 along with the wraparound portion 144 a. The protrusion 144b shown by the two-dot chain line in FIG. 3 shows the original shape before compression deformation. Further, in this fitted state, the wheel side surface 133c of the outward flange portion 133 excluding the thin portion 133d abuts on the vehicle body side end surface 2c of the outer ring member 2.

本実施形態のベアリングシール１１においては、巻き部１４４の回り込み部１４４ａと突条部１４４ｂとが、外向鍔部１３３の薄肉部１３３ｄと外輪部材２の車体側端面２ｃとの間に圧縮状態で介在することにより、外輪部材２の車体側端面２ｃが泥水等に晒されることがより確実に防止され、外輪部材２の車体側端面２ｃの発錆の懸念がより少なくなる。また、本実施形態においても、巻き部１４４を含んでシールリップ基部１４０が、芯金１３に一体に固着とされているから、高圧洗車による噴射水に晒されても巻き部１４４を含むシールリップ基部１４０がめくり上がり或いは破断することがない。これによって、外輪部材２の車体側端面２ｃが芯金１３及びシールリップ基部１４０によって覆われた状態に長く維持される。突条部１４４ｂにおける回り込み部１４４ａから外輪部材２の車体側端面２ｃ側への出幅（突出高さ）ｄ４は、０．１５〜０．２５ｍｍに設定される。ｄ４が０．１５ｍｍより小さい場合、前記と同様に外輪部材２の荷重変形に伴い芯金１３の外向鍔部１３３が外輪部材２の車体側端面２ｃから離れるように変形することがあり、そのため外輪部材２の車体側端面２ｃとの密着性が悪くなり、突条部１４４ｂによるシール性が低下する傾向となるからである。また、ｄ４が０．２５ｍｍより大きい場合は、前記圧入時に、圧入力の一部が突条部１４４ｂに吸収され、圧入が充分になされなくことが懸念されるからである。
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、その作用・効果等の説明は割愛する。 In the bearing seal 11 of the present embodiment, the wrapping portion 144a and the protruding portion 144b of the winding portion 144 are interposed in a compressed state between the thin portion 133d of the outward flange portion 133 and the vehicle body side end surface 2c of the outer ring member 2. By doing so, the vehicle body side end surface 2c of the outer ring member 2 is more reliably prevented from being exposed to muddy water and the like, and there is less concern about rusting of the vehicle body side end surface 2c of the outer ring member 2. Also in the present embodiment, since the seal lip base 140 including the winding portion 144 is integrally fixed to the core metal 13, the seal lip including the winding portion 144 even when exposed to the spray water by the high-pressure car wash. The base 140 does not roll up or break. As a result, the vehicle body side end surface 2c of the outer ring member 2 is maintained long in a state covered with the cored bar 13 and the seal lip base 140. A protruding width (projection height) d4 from the wraparound portion 144a of the protrusion 144b to the vehicle body side end surface 2c side of the outer ring member 2 is set to 0.15 to 0.25 mm. When d4 is smaller than 0.15 mm, the outward flange portion 133 of the core metal 13 may be deformed away from the vehicle body side end surface 2c of the outer ring member 2 in accordance with the load deformation of the outer ring member 2 as described above. This is because the adhesion between the member 2 and the end surface 2c on the vehicle body side is deteriorated, and the sealing performance by the protrusion 144b tends to be lowered. Moreover, when d4 is larger than 0.25 mm, at the time of the press-fitting, there is a concern that a part of the press-fitting is absorbed by the protrusion 144b and the press-fitting is not sufficiently performed.
Since other configurations are the same as those of the first embodiment, common portions are denoted by the same reference numerals, and descriptions of operations and effects thereof are omitted.

図４は本発明に係る密封装置の第三の実施形態を示す。本実施形態のベアリングシール（密封装置）１１では、第二の実施形態と同様に、芯金１３における外向鍔部１３３が途中から外径側端部１３３ｂに至る段差状の薄肉部１３３ｄを有している。また、シールリップ部材１４における巻き部１４４の回り込み部１４４ａは、この薄肉部１３３ｄと外輪部材２の車体側端面２ｃとの間に介在するよう形成されている。加えて、巻き部１４４は、外輪部材２の外周面２ｄよりも外径側に突出する環状の突部１４４ｃを有している。本実施形態のベアリングシール１１における外輪部材２は、ナックルハウジング１７に嵌合支持されるように構成されている。芯金１３の外輪部材２に対する嵌合状態では、第二の実施形態と同様に、回り込み部１４４ａが薄肉部１３３ｄと外輪部材２の車体側端面２ｃとの間に圧縮状態で介在するとともに、薄肉部１３３ｄを除く外向鍔部１３３の車輪側面１３３ｃは、外輪部材２の車体側端面２ｃに当接する。そして、この嵌合状態では、突部１４４ｃが、求心方向に圧縮された状態で、ナックルハウジング１７の内径面１７ａと外向鍔部１３３の外径側端部１３３ｂとの間に圧縮状態で介在する。図４における２点鎖線で示す突部１４４ｃは、圧縮変形前の原形状を示す。 FIG. 4 shows a third embodiment of the sealing device according to the present invention. In the bearing seal (sealing device) 11 according to the present embodiment, the outward flange portion 133 of the cored bar 13 has a step-like thin portion 133d extending from the middle to the outer diameter side end portion 133b, as in the second embodiment. ing. Further, the wraparound portion 144 a of the winding portion 144 in the seal lip member 14 is formed so as to be interposed between the thin wall portion 133 d and the vehicle body side end surface 2 c of the outer ring member 2. In addition, the winding portion 144 has an annular protrusion 144 c that protrudes to the outer diameter side from the outer peripheral surface 2 d of the outer ring member 2. The outer ring member 2 in the bearing seal 11 of the present embodiment is configured to be fitted and supported by the knuckle housing 17. In the fitting state of the core metal 13 with respect to the outer ring member 2, the wraparound portion 144 a is interposed in a compressed state between the thin wall portion 133 d and the vehicle body side end surface 2 c of the outer ring member 2, as in the second embodiment. The wheel side surface 133c of the outward flange portion 133 excluding the portion 133d is in contact with the vehicle body side end surface 2c of the outer ring member 2. In this fitted state, the protrusion 144c is compressed between the inner diameter surface 17a of the knuckle housing 17 and the outer diameter side end 133b of the outward flange 133 in a compressed state in the centripetal direction. . A protrusion 144c indicated by a two-dot chain line in FIG. 4 indicates the original shape before compression deformation.

本実施形態のベアリングシール１１においては、巻き部１４４の回り込み部１４４ａが、薄肉部１３３ｄと外輪部材２の車体側端面２ｃとの間に圧縮状態で介在することにより、外輪部材２の車体側端面２ｃが泥水等に晒されることがより確実に防止され、外輪部材２の車体側端面２ｃの発錆の懸念がより少なくなる。また、突部１４４ｃが、求心方向に圧縮された状態で、ナックルハウジング１７の内径面１７ａと外向鍔部１３３の外径側端部１３３ｂとの間に圧縮状態で介在するから、ナックルハウジング１７の内径面１７ａと外輪部材２の外周面との間への泥水等の浸入が阻止される。さらに、本実施形態においても、巻き部１４４を含んでシールリップ基部１４０が、芯金１３に一体に固着とされているから、高圧洗車による噴射水に晒されても巻き部１４４を含むシールリップ基部１４０がめくり上がり或いは破断することがない。これによって、外輪部材２の車体側端面２ｃが芯金１３及びシールリップ基部１４０によって覆われた状態に長く維持される。
その他の構成は第一及び第二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、その作用・効果等の説明は割愛する。 In the bearing seal 11 of the present embodiment, the wraparound portion 144a of the winding portion 144 is interposed between the thin portion 133d and the vehicle body side end surface 2c of the outer ring member 2 in a compressed state, whereby the vehicle body side end surface of the outer ring member 2 is obtained. 2c is more reliably prevented from being exposed to muddy water and the like, and there is less concern about rusting on the vehicle body side end surface 2c of the outer ring member 2. Further, since the protrusion 144c is compressed in the centripetal direction, it is interposed between the inner diameter surface 17a of the knuckle housing 17 and the outer diameter side end portion 133b of the outward flange 133, so that the knuckle housing 17 Infiltration of muddy water or the like between the inner diameter surface 17a and the outer peripheral surface of the outer ring member 2 is prevented. Further, in this embodiment, since the seal lip base 140 including the winding portion 144 is integrally fixed to the cored bar 13, the seal lip including the winding portion 144 even when exposed to spray water from a high-pressure car wash. The base 140 does not roll up or break. As a result, the vehicle body side end surface 2c of the outer ring member 2 is maintained long in a state covered with the cored bar 13 and the seal lip base 140.
Since other configurations are the same as those of the first and second embodiments, common portions are denoted by the same reference numerals, and descriptions of operations and effects thereof are omitted.

図５は、本発明に係る密封装置の第四の実施形態を示す。本実施形態のベアリングシール（密封装置）１１では、第一の実施形態のベアリングシール１１に加えて、芯金１３が、外向鍔部１３の外径側端部１３３ｂから軸Ｌ方向に沿って車体側に延出された外径側円筒部１３４を有している。シールリップ部材１４は外径側円筒部１３４の延出端１３４ａを回り込むよう当該外径側円筒部１３４を覆い、巻き部１４４に連続するように形成されている。シールリップ部材１４における外向鍔部１３３の車体側面１３３ａから外径側円筒部１３４の延出端１３４ａを覆う部分は厚肉とされ、その表面は車体側に向け漸次拡径するテーパ形状部１４０ｂとされている。さらに、シールリップ部材１４は、スリンガ１２における円筒部１２１の外径面１２１ｂに弾接するもう１個のラジアルリップ１４５を有している。２個のラジアルリップ１４３，１４５は、その先端部が互いに逆方向に向くように形成されている。 FIG. 5 shows a fourth embodiment of the sealing device according to the present invention. In the bearing seal (sealing device) 11 of the present embodiment, in addition to the bearing seal 11 of the first embodiment, the cored bar 13 extends from the outer diameter side end portion 133b of the outward flange 13 along the axis L direction. It has an outer diameter side cylindrical portion 134 extending to the side. The seal lip member 14 is formed so as to cover the outer diameter side cylindrical portion 134 so as to go around the extended end 134 a of the outer diameter side cylindrical portion 134 and to be continuous with the winding portion 144. The portion of the seal lip member 14 that covers the extended end 134a of the outer cylindrical portion 134 from the side surface 133a of the outward flange portion 133 is thick, and the surface thereof has a tapered portion 140b that gradually increases in diameter toward the vehicle body side. Has been. Further, the seal lip member 14 has another radial lip 145 that elastically contacts the outer diameter surface 121 b of the cylindrical portion 121 of the slinger 12. The two radial lips 143 and 145 are formed so that their tip portions face in opposite directions.

本実施形態のベアリングシール１１においては、ラジアルリップ１４３，１４５が２個あることにより、軸受空間Ｓ内への泥水等の浸入及び軸受空間Ｓ内に充填された潤滑剤の漏出等の防止機能がより強化される。また、外向鍔部１３の外径側端部１３３ｂから軸Ｌ方向に沿って車体側に延出された外径側円筒部１３４を有し、シールリップ部材１４がこの外径側円筒部１３４の全面に固着一体に覆われているから、外部からのベアリングシール１１内への泥水等の浸入防止がより効果的になされる。特に、庇状に延出された外径側円筒部１３４とこれを覆うシールリップ部材１４とにより、実質的に泥水等の浸入経路が長くなり、ベアリングシール１１内への泥水等の浸入防止効果が高められる。さらに、テーパ形状部１４０ｂに付着した泥水等は、テーパ形状部１４０ｂを伝って流下するとともに車体側に向かって流れ、そのまま軸受装置１外に排出されるから、ベアリングシール１１内へ浸入しようとする泥水等の量が少なくなる。そして、巻き部１４４の回り込み部１４４ａが、外向鍔部１３３の車輪側端面１３３ｃと外輪部材２の車体側端面２ｃとの間に圧縮状態で介在することとにより、外輪部材２の車体側端面２ｃが泥水等に晒されることがより確実に防止され、外輪部材２の車体側端面２ｃの発錆の懸念がより少なくなる。本実施形態においても、巻き部１４４を含んでシールリップ基部１４０が、芯金１３に一体に固着とされているから、高圧洗車による噴射水に晒されても巻き部１４４を含むシールリップ基部１４０がめくり上がり或いは破断することがない。これによって、外輪部材２の車体側端面２ｃが芯金１３及びシールリップ基部１４０によって覆われた状態に長く維持される。
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、ここでもその作用・効果等の説明は割愛する。 In the bearing seal 11 of the present embodiment, since there are two radial lips 143 and 145, a function of preventing intrusion of muddy water or the like into the bearing space S and leakage of the lubricant filled in the bearing space S is provided. More strengthened. Further, the outer rim portion 13 has an outer diameter side cylindrical portion 134 that extends from the outer diameter side end portion 133 b to the vehicle body side along the direction of the axis L, and the seal lip member 14 includes the outer diameter side cylindrical portion 134. Since the entire surface is fixed and integrally covered, intrusion of muddy water or the like into the bearing seal 11 from the outside is more effectively prevented. In particular, the outer diameter side cylindrical portion 134 extended in a bowl shape and the sealing lip member 14 covering the outer cylindrical portion 134 substantially increase the infiltration path of muddy water and the like, and prevent the muddy water from entering the bearing seal 11. Is increased. Further, muddy water or the like adhering to the tapered portion 140b flows down through the tapered portion 140b and flows toward the vehicle body, and is discharged to the outside of the bearing device 1 as it is. The amount of muddy water is reduced. The wraparound portion 144a of the winding portion 144 is interposed in a compressed state between the wheel side end surface 133c of the outward flange portion 133 and the vehicle body side end surface 2c of the outer ring member 2, whereby the vehicle body side end surface 2c of the outer ring member 2 is obtained. Is more reliably prevented from being exposed to muddy water and the like, and there is less concern about rusting of the vehicle body side end surface 2c of the outer ring member 2. Also in this embodiment, since the seal lip base 140 including the winding portion 144 is integrally fixed to the cored bar 13, the seal lip base 140 including the winding portion 144 even when exposed to the jet water from the high-pressure car wash. There is no turning up or breaking. As a result, the vehicle body side end surface 2c of the outer ring member 2 is maintained long in a state covered with the cored bar 13 and the seal lip base 140.
Since the other configuration is the same as that of the first embodiment, the same reference numerals are given to the common parts, and the description of the operations and effects is omitted here.

図６は、本発明に係る密封装置の第五の実施形態を示す。本実施形態のベアリングシール（密封装置）１１では、第一の実施形態のベアリングシール１１に加えて、巻き部１４４が、芯金１３における外向鍔部１３３の外径側端部１３３ｂから軸Ｌ方向に沿って車体側に向け延出された円筒状庇状部１４６を有している。また、シールリップ部材１４は、第四の実施形態と同様に、２個のラジアルリップ１４３，１４５を有している。さらに、スリンガ１２が、フランジ部１２２の外径側端部１２２ｃから車体側に延びる第２円筒部１２３と、この第２円筒部１２３の車体側端部１２３ａから外径側に延びる第２フランジ部１２４とを有している。加えて、シールリップ基部１４０は、外向鍔部１３３の車体側面１３３ａを覆う部分から車体側に延びて第２フランジ部１２４の車輪側面１２４ａに弾接するリップ部１４７を有している。 FIG. 6 shows a fifth embodiment of the sealing device according to the present invention. In the bearing seal (sealing device) 11 according to the present embodiment, in addition to the bearing seal 11 according to the first embodiment, the winding portion 144 extends from the outer diameter side end portion 133b of the outward flange portion 133 in the core metal 13 in the axis L direction. Is provided with a cylindrical bowl-shaped portion 146 extending toward the vehicle body side. Further, the seal lip member 14 has two radial lips 143 and 145 as in the fourth embodiment. Further, the slinger 12 has a second cylindrical portion 123 extending from the outer diameter side end portion 122c of the flange portion 122 to the vehicle body side, and a second flange portion extending from the vehicle body side end portion 123a of the second cylindrical portion 123 to the outer diameter side. 124. In addition, the seal lip base portion 140 has a lip portion 147 that extends toward the vehicle body side from a portion that covers the vehicle body side surface 133a of the outward flange 133 and elastically contacts the wheel side surface 124a of the second flange portion 124.

本実施形態のベアリングシール１１においては、ラジアルリップ１４３，１４５が２個あることにより、第四の実施形態と同様に、軸受空間Ｓ内への泥水等の浸入及び軸受空間Ｓ内に充填された潤滑剤の漏出等の防止機能がより強化される。そして、巻き部１４４が、軸Ｌ方向に沿って車体側に向け延出された円筒状庇状部１４６を有していることにより、実質的な泥水等の浸入経路が長くなり、これによって、外部からのベアリングシール１１内への泥水等の浸入防止がより効果的になされる。さらに、シールリップ基部１４０が、第２フランジ部１２４の車輪側面１２４ａに弾接するリップ部１４７を有していることにより、ベアリングシール１１内への泥水等の浸入がより確実に防止される。本実施形態においても、円筒状庇状部１４６を有する巻き部１４４を含んでシールリップ基部１４０が、芯金１３に一体に固着とされているから、高圧洗車による噴射水に晒されても巻き部１４４を含むシールリップ基部１４０がめくり上がり或いは破断することがない。これによって、外輪部材２の車体側端面２ｃが芯金１３及びシールリップ基部１４０によって覆われた状態に長く維持される。
その他の構成は第一及び第四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、ここでもその作用・効果等の説明は割愛する。 In the bearing seal 11 of the present embodiment, since there are two radial lips 143 and 145, the intrusion of muddy water or the like into the bearing space S and the bearing space S is filled, as in the fourth embodiment. The function of preventing leakage of the lubricant is further strengthened. And since the winding part 144 has the cylindrical bowl-shaped part 146 extended toward the vehicle body side along the axis | shaft L direction, the infiltration path | routes, such as substantial muddy water, become long by this, Intrusion of muddy water or the like into the bearing seal 11 from the outside is more effectively prevented. Furthermore, since the seal lip base portion 140 has the lip portion 147 that elastically contacts the wheel side surface 124 a of the second flange portion 124, intrusion of muddy water or the like into the bearing seal 11 is more reliably prevented. Also in this embodiment, since the seal lip base 140 including the winding portion 144 having the cylindrical bowl-shaped portion 146 is integrally fixed to the core metal 13, it is wound even if it is exposed to spray water from a high-pressure car wash. The seal lip base 140 including the portion 144 is not turned up or broken. As a result, the vehicle body side end surface 2c of the outer ring member 2 is maintained long in a state covered with the cored bar 13 and the seal lip base 140.
Since other configurations are the same as those of the first and fourth embodiments, common portions are denoted by the same reference numerals, and description of the operations and effects thereof is omitted here.

図７は、第一の実施形態の変形例を示す。この例のベアリングシール（密封装置）１１では、シールリップ基部１４０における外向鍔部１３３の車体側面１３３ａを覆う部分が、芯金円筒部１３１の他端部１３１ｂから外径側に向け厚肉部１４８とされている。この厚肉部１４８の表面は、その途中から車輪側に向け漸次拡径するテーパ形状部１４０ｃとされている。このようなテーパ形状部１４０ｃを有することにより、当該テーパ形状部１４０ｃに付着した泥水等は、ベアリングシール１１内に流入することなく、テーパ形状部１４０ｃを伝って流下し軸受装置１外に排出されるので、軸受空間Ｓ内への泥水等の浸入防止が効果的になされる。
その他の構成は第一及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、ここでもその作用・効果等の説明は割愛する。 FIG. 7 shows a modification of the first embodiment. In the bearing seal (sealing device) 11 of this example, the portion of the seal lip base 140 that covers the vehicle body side surface 133a of the outward flange 133 is a thick portion 148 from the other end 131b of the cored bar cylindrical portion 131 toward the outer diameter side. It is said that. The surface of the thick portion 148 is a tapered portion 140c that gradually increases in diameter from the middle toward the wheel side. By having such a tapered portion 140c, muddy water or the like adhering to the tapered portion 140c flows down through the tapered portion 140c and is discharged out of the bearing device 1 without flowing into the bearing seal 11. Therefore, intrusion of muddy water or the like into the bearing space S can be effectively prevented.
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 of the operations and effects is omitted here.

図８は、第一の実施形態の別の変形例を示す。この例のベアリングシール（密封装置）１１では、第一の実施形態における磁気エンコーダ１５を有さず、したがって、図１に示すような磁気センサ１６が車体側に設置されず、ドライブシャフト７（車輪）の回転検出機構を構成するものではない。本実施形態のベアリングシール１１のその他の構成は第一の実施形態と同様であり、したがって、第一の実施形態のベアリングシール１１と同様の機能を奏する。第二〜第五の実施形態のベアリングシール１１においても、磁気エンコーダを有さないものを変形例として採用することはもとより可能である。したがって、これら変形例も対応する実施形態と同様の機能を奏する。 FIG. 8 shows another modification of the first embodiment. The bearing seal (sealing device) 11 of this example does not have the magnetic encoder 15 in the first embodiment. Therefore, the magnetic sensor 16 as shown in FIG. ) Does not constitute the rotation detection mechanism. The other structure of the bearing seal 11 of this embodiment is the same as that of 1st embodiment, Therefore, there exists the same function as the bearing seal 11 of 1st embodiment. Even in the bearing seals 11 of the second to fifth embodiments, it is possible to adopt a bearing seal 11 having no magnetic encoder as a modified example. Therefore, these modifications also have the same functions as the corresponding embodiments.

なお、前記実施形態における芯金１３及びこれに固着されるシールリップ部材１４の形態は図例のものに限定されず、外輪部材２の車体側端面２ｃを覆うように構成されるものであれば、他の形態も採用可能である。また、アキシャルリップ、ラジアルリップの数も、例示のものに限定されず、求められる密封性等に応じて、適宜設計的に選択採用される。さらに、スリンガ１２の形態も、内輪部材５に嵌合される円筒部１２１及び円筒部１２１の一端部から連成されるフランジ部１２２を有するものであれば、他の形態も採用可能である。さらに、本発明に係る密封装置が適用される自動車用ハブ軸受装置１も、図１に示した形態のものに限らず、他の形態の自動車用ハブ軸受装置であっても良い。加えて、図１では、駆動輪用の軸受装置を示しているが、従動輪用の軸受装置であっても良い。 In addition, the form of the metal core 13 and the seal lip member 14 fixed to the metal core 13 in the above embodiment is not limited to the example shown in the drawings, and may be any one that is configured to cover the vehicle body side end surface 2c of the outer ring member 2. Other forms are also possible. Further, the number of axial lips and radial lips is not limited to the illustrated ones, and can be selected and adopted as appropriate according to the required sealing performance. Furthermore, as long as the slinger 12 has a cylindrical part 121 fitted to the inner ring member 5 and a flange part 122 coupled from one end of the cylindrical part 121, other forms can be adopted. Furthermore, the automobile hub bearing device 1 to which the sealing device according to the present invention is applied is not limited to the one shown in FIG. 1, and may be another type of automobile hub bearing device. In addition, although FIG. 1 shows a bearing device for a drive wheel, a bearing device for a driven wheel may be used.

１自動車用ハブ軸受装置
２外輪部材
２ｃ車体側端面
５内輪部材
１１ベアリングシール（密封装置）
１２スリンガ
１２１円筒部
１２１ａ一端部
１２１ｂ他端部
１２２フランジ部
１３芯金
１３１芯金円筒部
１３１ａ一端部
１３２内向鍔部
１３３外向鍔部
１３３ｂ外径側端部
１３４外径側円筒部
１３４ａ延出端
１４シールリップ部材
１４１，１４２アキシャルリップ
１４４巻き部
１４４ｂ突条部
１４４ｃ突部
１４６円筒状庇状部
Ｌ軸
Ｓ１軸受空間（外輪部材及び内輪部材間の車体側の隙間） DESCRIPTION OF SYMBOLS 1 Hub bearing apparatus for motor vehicles 2 Outer ring member 2c End face of vehicle body 5 Inner ring member 11 Bearing seal (sealing device)
12 Slinger 121 Cylindrical part 121a One end part 121b The other end part 122 Flange part 13 Core metal 131 Core metal cylindrical part 131a One end part 132 Inward flange part 133 Outward flange part 133b Outer diameter side end part 134 Outer diameter side cylindrical part 134a Extension end 14 Seal lip member 141, 142 Axial lip 144 Winding portion 144b Projection portion 144c Projection portion 146 Cylindrical flange portion L shaft S1 Bearing space (gap on the vehicle body side between the outer ring member and the inner ring member)

Claims

A slinger fitted to the inner ring member and fitted to the outer ring member, used in a hub bearing device for an automobile comprising a metal outer ring member and an inner ring member supported coaxially with the outer ring member. A sealing device for sealing a gap on the vehicle body side between the outer ring member and the inner ring member by combining a cored bar and a seal lip member fixed to the cored bar,
The slinger has a cylindrical portion that is fitted to the inner ring member, and a flange portion that is coupled to one end of the cylindrical portion,
The seal lip member has a plurality of axial lips that elastically contact the flange portion,
The cored bar includes a cored bar cylindrical part fitted to the outer ring member, an inward flange part extending radially inward from one end part of the cored bar cylindrical part, and the other end of the cored bar cylindrical part An outward flange portion that extends radially outward so as to cover the end surface of the outer ring member on the vehicle body side from the portion,
The sealing device according to claim 1, wherein an outer diameter side end portion of the outward flange is integrally covered with a winding portion formed by winding an end portion of the seal lip member.

The sealing device according to claim 1,
The said winding part has the cyclic | annular ridge part elastically contacted to the said vehicle body side end surface of the said outer ring member in a compression state, The sealing device characterized by the above-mentioned.

The sealing device according to claim 1 or 2,
The said winding part has the protrusion which protrudes in an outer diameter side rather than the outer peripheral surface of the said outer ring member, The sealing device characterized by the above-mentioned.

In the sealing device according to any one of claims 1 to 3,
The core bar has an outer diameter side cylindrical portion that extends from the outer diameter side end portion of the outward flange to the vehicle body side along the axial direction, and the seal lip member extends from the outer diameter side cylindrical portion. A sealing device characterized in that it is formed so as to cover the outer diameter side cylindrical portion so as to go around the outlet end and to be continuous with the winding portion.

In the sealing device according to any one of claims 1 to 3,
The said winding part has the cylindrical collar-shaped part extended toward the vehicle body side along the axial direction from the outer diameter side edge part of the said outward collar part, The sealing device characterized by the above-mentioned.