JP6526387B2 - Sealing device - Google Patents

Sealing device Download PDF

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JP6526387B2
JP6526387B2 JP2014095068A JP2014095068A JP6526387B2 JP 6526387 B2 JP6526387 B2 JP 6526387B2 JP 2014095068 A JP2014095068 A JP 2014095068A JP 2014095068 A JP2014095068 A JP 2014095068A JP 6526387 B2 JP6526387 B2 JP 6526387B2
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seal
flange portion
seal lip
sealing device
flange
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JP2015212561A (en
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勢野　洋嗣
洋嗣 勢野
愛 塩塚
愛 塩塚
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Uchiyama Manufacturing Corp
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Uchiyama Manufacturing Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7873—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section
    • F16C33/7876—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section with sealing lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings
    • F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

Description

本発明は、例えば、自動車等の車輪支持部の軸受装置等のような機械装置に用いられる密封装置に関し、さらに詳しくは、外輪に対してフランジ付内輪が軸回転可能に支持される軸受装置のフランジ側内輪と外輪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 mechanical device such as, for example, a bearing device for a wheel support of an automobile or the like, and more specifically, to a bearing device in which a flanged inner ring is rotatably supported with respect to an outer ring. The present invention relates to a sealing device mounted between a flange side inner ring and an outer ring.

近時、自動車等の車輪支持部の軸受装置としては、ハブベアリングが多く用いられるようになった（例えば、特許文献１〜特許文献３参照）。このハブベアリングは、車体に固定される外輪に対して、車輪が取付けられるフランジ付内輪が軸回転可能に支持されるよう構成される。外輪と内輪との軸方向両端部には、軸受空間への泥水、塵埃（以下、まとめて泥水等と言う）等の浸入を防止し、或いは軸受空間に充填される潤滑剤（グリース等）の漏出を防止するための密封装置が装着される。特許文献１及び特許文献２に示される車輪用軸受装置におけるフランジ側（車輪側、アウター側）の密封装置は、外輪に嵌合される芯金と、芯金に固着されるゴム等の弾性体からなるシール体とを備える。シール体は、前記内輪に直接又はスリンガを介して弾接するシールリップを備える。   Recently, hub bearings have come to be widely used as bearing devices for wheel supports of automobiles and the like (see, for example, Patent Documents 1 to 3). The hub bearing is configured such that a flanged inner ring to which a wheel is attached is rotatably supported with respect to an outer ring fixed to a vehicle body. At both axial ends of the outer ring and the inner ring, entry of mud water and dust (hereinafter collectively referred to as mud water etc.) into the bearing space is prevented, or lubricant (grease etc.) filled in the bearing space A sealing device is attached to prevent leakage. The sealing device on the flange side (wheel side, outer side) in the bearing device for a wheel shown in Patent Document 1 and Patent Document 2 includes a cored bar fitted to the outer ring and an elastic body such as rubber fixed to the cored bar And a seal body made of The seal body includes a seal lip resiliently contacting the inner ring directly or via a slinger.

このような密封装置においては、シール体と内輪のフランジ部との隙間から泥水等が当該密封装置内に浸入すると、シールリップと内輪との弾接部に塵埃が噛み込む。そして、弾接部に塵埃が噛み込んだ状態で内輪が回転を継続すると、シールリップと内輪との相互の摺接に伴い、シールリップの先端部が摩耗して、軸受空間の密封機能が経時的に低下する。特許文献１の図２には、シール体を外輪の外周面より外径側に突出させ、この突出部分の先端部に折り曲げ部を設けてフランジ部との間にラビリンスを形成することが記載されている。このような構成のシール体によれば、密封装置内への泥水等の浸入が抑えられ、シールリップの先端部の摩耗が抑制されると解される。また、特許文献２では、シール体を特許文献１と同様に外輪の外周面より外径側に突出させ、外輪の外周面を伝う泥水等の密封装置内への浸入を抑えるようにしている。さらに、特許文献３では、シール体を外輪のアウター側端面に沿って外輪の外周面よりも外径側に突出させるとともに、シール体のフランジ部に対向する面に突起を設け、この突起とフランジ部との間にラビリンスを形成している。これによって、外輪とフランジ部との隙間から密封装置内へ泥水等が浸入することを抑えるようにしている。   In such a sealing device, when muddy water or the like intrudes into the sealing device from the gap between the seal body and the flange portion of the inner ring, dust bites into the resilient contact portion between the seal lip and the inner ring. Then, when the inner ring continues to rotate while dust is caught in the resilient contact portion, the tip of the seal lip is worn due to the mutual sliding contact between the seal lip and the inner ring, and the sealing function of the bearing space is aged over time Decrease. In FIG. 2 of Patent Document 1, it is described that the seal body is made to protrude outward from the outer peripheral surface of the outer ring, and a bent portion is provided at the tip of this protruding portion to form a labyrinth between the flange portion ing. According to the seal body having such a configuration, it is considered that the entry of muddy water or the like into the sealing device is suppressed, and the wear of the tip portion of the seal lip is suppressed. Further, in Patent Document 2, as in Patent Document 1, the seal body is protruded to the outer diameter side from the outer peripheral surface of the outer ring so as to suppress the entry of mud water or the like along the outer peripheral surface of the outer ring into the sealing device. Furthermore, in Patent Document 3, the seal body is made to project along the outer side end face of the outer ring toward the outer diameter side than the outer peripheral surface of the outer ring, and a projection is provided on the surface facing the flange portion of the seal body. Labyrinth is formed between the parts. By this, it is made to suppress that muddy water etc. infiltrate into a sealing device from the crevice between an outer ring and a flange part.

特許第４５０７７３４号公報Patent No. 4507734 特開２０１１−１１７５２９号公報JP, 2011-117529, A 特開２０１３−１９０１０１号公報JP, 2013-190101, A

ところで、前記特許文献１及び３には、外輪の外周面より外径側に突出するシール体の部分及び前記ラビリンスによって密封装置への泥水等の浸入を防止する構造が示されているが、このような構造だけでは泥水等の浸入防止効果は充分に得られないと考えられる。また、特許文献２の密封装置では、泥水等が外輪の外周部を伝って密封装置内へ浸入することは防止できないと考えられる。シール体とフランジ部との間からの泥水等の浸入は防止できない。そこで、効果的に泥水の浸入を防止する構造の開発が望まれるところであった。   By the way, although the said patent documents 1 and 3 have a structure which prevents permeation of mud water etc. to a sealing device by the part of the seal object projected to the outside diameter side from the peripheral face of an outer ring and the above-mentioned labyrinth. It is considered that such a structure alone can not sufficiently prevent the penetration of mud and the like. Further, it is considered that the sealing device of Patent Document 2 can not prevent muddy water or the like from entering the sealing device along the outer peripheral portion of the outer ring. It is impossible to prevent the infiltration of muddy water etc. from between the seal body and the flange portion. Therefore, it has been desired to develop a structure that effectively prevents the infiltration of muddy water.

本発明は、上記実情に鑑みなされたものであり、泥水等の浸入を効果的に防止することができる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-described circumstances, and an object thereof is to provide a sealing device capable of effectively preventing the infiltration of muddy water and the like.

本発明に係る密封装置は、連続して拡径するフランジ部を有する内側部材と該内側部材に対して相対的に軸回転する外側部材とを備える機械装置に用いられ、前記外側部材に装着されて前記外側部材及び内側部材間の前記フランジ部側の隙間を密封する密封装置であって、前記外側部材に取付けられる芯金と、前記芯金に固着されるシール体とを備え、前記シール体は、前記外側部材の外周より外径側に延びる堰部と、該堰部から前記フランジ部側に向かって延びる第１シールリップとを含み、前記堰部は前記フランジ部に非接触であり、前記第１シールリップより厚みが大とされ、前記堰部の外径側端部は、前記第１シールリップの外周より径方向外側に位置し、前記シール体には、さらに第２シールリップが、前記第１シールリップよりも径方向内側であって前記外側部材の内周よりも径方向外側に位置するように設けられていることを特徴とする。 The sealing device according to the present invention is used in a mechanical device provided with an inner member having a flange portion which is continuously expanded in diameter and an outer member which pivots relative to the inner member, and is mounted on the outer member A sealing device for sealing a gap between the outer member and the inner member on the side of the flange portion, the sealing member comprising a cored bar attached to the outer member, and a seal body fixed to the cored bar; And a collar portion extending outward from the outer periphery of the outer member, and a first seal lip extending from the collar portion toward the flange portion, wherein the collar portion is not in contact with the flange portion, The thickness is greater than that of the first seal lip, and the outer diameter side end of the flange portion is located radially outward of the outer periphery of the first seal lip , and the second seal lip is further attached to the seal body. From the first seal lip Characterized in that a radially inner provided so as to be positioned radially outward from the inner periphery of the outer member.

本発明によれば、シール体が外側部材の外周より外径側に延びる堰部を含んでいるから、外側部材の外周を伝う泥水等が、当該密封装置内に直接浸入することが抑制される。また、第１シールリップが堰部から内側部材のフランジ部に向かって延びることによって、泥水等が堰部とフランジ部との間から密封装置内に直接浸入しようとすることが抑制される。しかも、この堰部の外径側端部が、前記第１シールリップの外周より径方向外側に位置することにより、泥水等が、直接第１シールリップに向かって流入することが抑制され、第１シールリップの寿命を延ばすことができる。また本発明によれば、第２シールリップがさらに設けられていることによって、第１シールリップと第２シールリップとの相乗効果で、一層密封性が高められる。そして、第２シールリップが外側部材の内周よりも外側に位置するよう設けられているから、シール体が一体に固着された芯金を押して外側部材の内周に取付けるような場合に、取付作業の邪魔にならず、当該第２シールリップが傷つく懸念がない。 According to the present invention, since the seal body includes the flange portion extending to the outer diameter side from the outer periphery of the outer member, the muddy water etc. transmitted along the outer periphery of the outer member is prevented from directly invading the sealing device. . Further, the first seal lip extends from the buttock toward the flange of the inner member, thereby preventing mud water or the like from entering the sealing device directly from between the buttock and the flange. In addition, when the outer diameter side end portion of the flange portion is positioned radially outward of the outer periphery of the first seal lip, muddy water etc. is prevented from flowing directly toward the first seal lip, The life of the seal lip can be extended. Further, according to the present invention, by further providing the second seal lip, the sealing effect is further enhanced by the synergistic effect of the first seal lip and the second seal lip. And since the 2nd seal lip is provided so that it may be located outside the inner circumference of an outer side member, when pushing the metal core which a seal body adhered on one side and attaching to the inner circumference of an outer side member, attachment There is no concern that the second seal lip will be damaged without being in the way of work.

本発明に係る密封装置は、連続して拡径するフランジ部を有する内側部材と該内側部材に対して相対的に軸回転する外側部材とを備える機械装置に用いられ、前記外側部材に装着されて前記外側部材及び内側部材間の前記フランジ部側の隙間を密封する密封装置であって、前記外側部材に取付けられる芯金と、前記芯金に固着されるシール体とを備え、前記シール体は、前記外側部材の外周より外径側に延びる堰部と、該堰部から前記フランジ部側に向かって延びる第１シールリップとを含み、前記堰部は前記フランジ部に非接触であり、前記第１シールリップより厚みが大とされ、前記堰部の外径側端部は、前記第１シールリップの外周より径方向外側に位置し、前記第１シールリップは、その外径側の面が、基端部から先端部に向け拡径するように傾斜していることを特徴とする。
本発明によれば、仮に堰部を乗り越えて泥水等が第１シールリップに至っても、泥水等は第１シールリップの基端部側に誘導されるので、第１シールリップとフランジ部との間に塵埃等が噛み込み難く、第１シールリップの先端部の摩耗が抑制される。 The sealing device according to the present invention is used in a mechanical device provided with an inner member having a flange portion which is continuously expanded in diameter and an outer member which pivots relative to the inner member, and is mounted on the outer member A sealing device for sealing a gap between the outer member and the inner member on the side of the flange portion, the sealing member comprising a cored bar attached to the outer member, and a seal body fixed to the cored bar; And a collar portion extending outward from the outer periphery of the outer member, and a first seal lip extending from the collar portion toward the flange portion, wherein the collar portion is not in contact with the flange portion, The thickness is greater than that of the first seal lip, and the outer diameter side end of the flange portion is located radially outward of the outer periphery of the first seal lip, and the first seal lip is on the outer diameter side The surface increases in diameter from the proximal end to the distal end Characterized in that inclined so that.
According to the present invention, even if muddy water etc. passes over the buttocks and the muddy water etc. reaches the first seal lip, the muddy water etc. is guided to the base end side of the first seal lip, so the first seal lip and the flange part Dust and the like do not easily get caught between them, and wear of the tip of the first seal lip is suppressed.

本発明に係る密封装置は、連続して拡径するフランジ部を有する内側部材と該内側部材に対して相対的に軸回転する外側部材とを備える機械装置に用いられ、前記外側部材に装着されて前記外側部材及び内側部材間の前記フランジ部側の隙間を密封する密封装置であって、前記外側部材に取付けられる芯金と、前記芯金に固着されるシール体とを備え、前記シール体は、前記外側部材の外周より外径側に延びる堰部と、該堰部から前記フランジ部側に向かって延びる第１シールリップとを含み、前記堰部は前記フランジ部に非接触であり、前記第１シールリップより厚みが大とされ、前記堰部の外径側端部は、前記第１シールリップの外周より径方向外側に位置し、前記堰部は、一定の厚みであるとともに、軸方向に直交するように延びていることを特徴とする。
本発明によれば、泥水等が、外側部材の外周を伝って堰部を乗り越え、当該密封装置内に浸入することをより効果的に抑制することができる。
 The sealing device according to the present invention is used in a mechanical device provided with an inner member having a flange portion which is continuously expanded in diameter and an outer member which pivots relative to the inner member, and is mounted on the outer member A sealing device for sealing a gap between the outer member and the inner member on the side of the flange portion, the sealing member comprising a cored bar attached to the outer member, and a seal body fixed to the cored bar; And a collar portion extending outward from the outer periphery of the outer member, and a first seal lip extending from the collar portion toward the flange portion, wherein the collar portion is not in contact with the flange portion, The thickness is larger than the first seal lip, the outer diameter side end of the collar is positioned radially outward from the outer periphery of the first seal lip, and the collar has a constant thickness, Extends perpendicularly to the axial direction It is characterized in.
According to the present invention, it is possible to more effectively suppress that muddy water or the like travels along the outer periphery of the outer member, gets over the buttocks, and intrudes into the sealing device.

本発明の密封装置によれば、泥水等の密封装置への浸入を効果的に防止することができ、外側部材及び内側部材間の隙間の密封機能を向上させることができる。   According to the sealing device of the present invention, it is possible to effectively prevent the entry of mud water or the like into the sealing device, and it is possible to improve the sealing function of the gap between the outer member and the inner member.

本発明に係る密封装置が適用される軸受装置の一例を示す概略的縦断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic longitudinal cross-sectional view which shows an example of the bearing apparatus with 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 FIG. 1, and is a figure which shows 1st embodiment of the sealing device based on this 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 based 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 based 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 based on this invention.

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軸受装置（機械装置）１を示す。この軸受装置１は、大略的に、外側部材としての外輪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部材４と、外輪２とハブ輪３及び内輪部材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及び内輪部材４が内側部材としての内輪５を構成する。外輪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（不図示）が同軸的にスプライン嵌合される。内輪５（ハブ輪３及び内輪部材４）は、外輪２に対して、軸Ｌ回りに回転可能とされる。外輪２及び内輪５は、相対的に軸回転する２部材として構成され、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２の軌道輪２ａ、ハブ輪３及び内輪部材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連続して拡径するよう形成されたハブフランジ（フランジ部）３２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において右側を向く側）を車輪側、車体に向く側（同左側を向く側）を車体側と言う。   Hereinafter, embodiments of the present invention will be described based on the drawings. FIG. 1 shows a bearing device (mechanical device) 1 rotatably supporting a vehicle wheel (not shown). The bearing device 1 roughly includes an outer ring 2 as an outer member, a hub wheel 3, an inner ring member 4 integrally fitted on the vehicle body side of the hub wheel 3, an outer ring 2, a hub ring 3 and an inner ring member And four rows of rolling elements (balls) 6... In this example, the hub wheel 3 and the inner ring member 4 constitute an inner ring 5 as an inner member. The outer ring 2 is fixed to a vehicle body (not shown) of the automobile. Further, a drive shaft (not shown) is spline fitted coaxially to the hub wheel 3. The inner ring 5 (the hub ring 3 and the inner ring member 4) is rotatable about the axis L with respect to the outer ring 2. The outer ring 2 and the inner ring 5 are configured as two members relatively pivoting, and an annular space S is formed between the two members. In the annular space S, in a state where the two rows of rolling elements 6 are held by the retainer 6a, it is possible to roll the bearing ring 2a of the outer ring 2, the hub ring 3 and the bearing rings 3a and 4a of the inner ring member 4. It is interspersed. The hub wheel 3 has a cylindrical hub wheel main body 30 and a hub flange (flange portion) 32 formed so as to continuously expand in diameter radially outward from the hub wheel main body 30 via the rising base 31. The wheel is attached and fixed to the hub flange 32 by a bolt 33 and a nut (not shown). Hereinafter, the side facing the wheel along the axis L direction (the side facing the right in FIG. 1) is referred to as the wheel side, and the side facing the vehicle body (the side facing the left) 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２とハブ輪３との間、及び外輪２と内輪部材４との間には、ベアリングシール７，８が装着される。軸受空間Ｓの軸Ｌ方向に沿った両端部はベアリングシール７，８によって密封される。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。ベアリングシール７，８のうち、車輪側のベアリングシール８が本発明に係る密封装置に相当する。 このベアリングシール（密封装置）８の実施の形態について、図２〜図５をも参照して説明する。図２は第一の実施形態を示し、図例のベアリングシール８は、外輪２の内径部（内周部）２ｂに嵌合される芯金９と、芯金９に固着されたゴム製（弾性体製）のシール体１０とを備える。芯金９は、外輪２の内径部（内周部）２ｂに嵌合される円筒部９ａと、円筒部９ａの軸受空間Ｓ側（車体側）の一端部９ａａより内径方向に延出された内向鍔部９ｂと、円筒部９ａの軸受空間Ｓとは反対側（車輪側）の他端部９ａｂより外径方向に延出された外向鍔部９ｃとを有する。外向鍔部９ｃは、当該芯金９が外輪２の内径部２ｂに嵌合されたときには、外輪２の軸Ｌ方向車輪側端面２ｃに当接するように形成されている。 The annular space S forms a bearing space and is both end portions along the axis L direction of the annular space (hereinafter referred to as a bearing space) S, and between the outer ring 2 and the hub wheel 3 and the outer ring 2 Between the inner ring member 4 and the bearing seals 7 and 8 are mounted. Both ends of the bearing space S along the axis L direction are sealed by the bearing seals 7 and 8. This prevents the entry of muddy water or the like into the bearing space S and the leakage of lubricant (such as grease) filled in the bearing space S to the outside. Of the bearing seals 7 and 8, the bearing seal 8 on the wheel side corresponds to the sealing device according to the present invention. An embodiment of the bearing seal (sealing device) 8 will be described with reference to FIGS. FIG. 2 shows the first embodiment, and the bearing seal 8 in the illustrated example is made of a core metal 9 fitted to the inner diameter portion (inner peripheral portion) 2b of the outer ring 2 and a rubber fixed to the core metal 9 And a seal body 10 made of an elastic body). The metal core 9 is extended in the inner diameter direction from the cylindrical portion 9a fitted to the inner diameter portion (inner peripheral portion ) 2b of the outer ring 2 and one end portion 9aa of the bearing space S side (vehicle body side) of the cylindrical portion 9a. It has an inward flange 9b and an outward flange 9c extending in the outer diameter direction from the other end 9ab on the opposite side (wheel side) of the bearing space S of the cylindrical portion 9a. The outward flange portion 9 c is formed to abut on the axial L direction wheel side end surface 2 c of the outer ring 2 when the core metal 9 is fitted to the inner diameter portion 2 b of the outer ring 2.

シール体１０は、芯金９に固着されるシール体基部１１と、このシール体基部１１から張出すように設けられる後記する複数のシールリップとを含んで構成される。シール体基部１１は、芯金９における内向鍔部９ｂの軸受空間Ｓとは反対側の面（車輪側の面）９ｂａ、円筒部９ａの内径面９ａｃ及び外向鍔部９ｃの軸受空間Ｓとは反対側の面９ｃａを覆う。シール体基部１１は、さらに、内向鍔部９ｂの内径側端縁部９ｂｂを回り込んで軸受空間Ｓ側の面（車体側の面）９ｂｃの一部を覆っている。また、シール体基部１１は、外向鍔部９ｃの外径側端縁部９ｃｂを回り込んで軸受空間Ｓ側の面に形成された段差面９ｃｃを覆っている。シール体１０は、シール体基部１１の外向鍔部９ｃを覆う部分からさらに外径側に延び外輪２の外径部（外周）２ｄより外径側に突出する堰部１２を含んでいる。また、シール体１０は、シール体基部１１からフランジ部３２側に向かって延びる第１シールリップ１３及び第２シールリップ１４をさらに含む。堰部１２は、軸Ｌ方向に直交するように延び、且つ、軸Ｌ方向に沿った厚みが一定となるように形成されている。堰部１２は、その厚みが第１シールリップ１３及び第２シールリップ１４の厚みより厚くなるように形成されている。堰部１２の外径側端部１２ａは、第１シールリップ１３の外周１３ａより径方向外側に位置している。第１シールリップ１３は、堰部１２の基端側から延びるとともに堰部１２の外径側端部１２ａよりも外径側に突出しないように形成される。なお、本実施形態において、堰部１２に設けられている第１シールリップ１３は１個であるが、堰部１２は、第１シールリップ１３の他にもシールリップを配設可能な程度に外径側に突出している（本実施形態では外輪の外径部２ｄよりも外径側に１．０〜１０ｍｍ突出している）。第２シールリップ１４は、第１シールリップ１３よりも径方向内側であって外輪２の内径部２ｂよりも径方向外側に位置するように設けられている。そして、第１シールリップ１３及び第２シールリップ１４は、ともに、その外径側の面及び内径側の面が、シール体基部１１側の基端部から先端部に向け拡径するようにテーパ状に傾斜している。加えて、本実施形態のシール体１０は、第２シールリップ１４より内径側に、シール体基部１１からフランジ部３２側及び立上基部３１に向かって延びる２個のアキシャルリップ（シールリップ）１５，１６と、ハブ輪本体３０に向かって延びるラジアルリップ（シールリップ）１７とを備えている。   The seal body 10 is configured to include a seal body base 11 fixed to the core metal 9 and a plurality of seal lips described later which are provided so as to extend from the seal body base 11. The seal body base 11 is a surface (surface on the wheel side) 9ba opposite to the bearing space S of the inward flange portion 9b in the core metal 9, an inner diameter surface 9ac of the cylindrical portion 9a, and a bearing space S of the outward flange portion 9c Cover the opposite side 9ca. The seal body base 11 further wraps around the inner diameter side end edge 9bb of the inward flange portion 9b to cover a part of the surface on the bearing space S side (the surface on the vehicle body side) 9bc. Further, the seal body base 11 covers the step surface 9 cc formed on the surface on the bearing space S side, around the outer diameter side end edge 9 cb of the outward flange portion 9 c. The seal body 10 includes a collar portion 12 extending further outward from the portion covering the outward flange portion 9 c of the seal body base 11 and projecting outward from the outer diameter portion (outer periphery) 2 d of the outer ring 2. The seal body 10 further includes a first seal lip 13 and a second seal lip 14 extending from the seal body base 11 toward the flange portion 32. The ridge portion 12 extends so as to be orthogonal to the axis L direction, and is formed such that the thickness along the axis L direction is constant. The collar portion 12 is formed to be thicker than the thickness of the first seal lip 13 and the second seal lip 14. The outer diameter side end 12 a of the collar 12 is located radially outward of the outer periphery 13 a of the first seal lip 13. The first seal lip 13 is formed so as to extend from the proximal end side of the collar 12 and not to protrude further to the outer diameter side than the outer diameter side end 12 a of the collar 12. In the present embodiment, the number of the first seal lip 13 provided in the collar portion 12 is one, but the collar portion 12 can be provided with a seal lip in addition to the first seal lip 13. It protrudes to the outer diameter side (In this embodiment, it protrudes 1.0 to 10 mm to the outer diameter side from the outer diameter part 2d of the outer ring). The second seal lip 14 is provided radially inward of the first seal lip 13 and radially outward of the inner diameter portion 2 b of the outer ring 2. And both the 1st seal lip 13 and the 2nd seal lip 14 are tapered so that the field by the side of the diameter outside and the field by the side of the inside may be diameter-expanded toward the tip part from the base end by the side of seal object base 11 It is inclined in the shape of a circle. In addition, the seal body 10 of the present embodiment has two axial lips (seal lips) 15 that extend from the seal body base 11 toward the flange portion 32 and the rising base 31 on the inner diameter side of the second seal lip 14. , 16 and a radial lip (seal lip) 17 extending toward the hub wheel main body 30.

フランジ部３２の車体側フランジ面は、第１フランジ面３２ａ及び段差状の第２フランジ面３２ｂを備えている。第１フランジ面３２ａは、立上基部３１の湾曲する凹曲面３１ａを経て、外輪２の軸Ｌ方向に沿った車輪側端面２ｃに対向する位置まで延びるよう形成されている。また、第２フランジ面３２ｂは、第１フランジ面３２ａより外径側に連続するとともに、前記外輪２の軸方向端面２ｃに対して軸Ｌ方向に遠ざかるよう段差状に形成されている。そして、第１シールリップ１３は第２フランジ面３２ｂに弾接するよう構成されている。第２シールリップ１４及びアキシャルリップ１５，１６は第１フランジ面３２ａ及び立上基部３１の凹曲面３１ａに弾接するよう構成されている。ラジアルリップ１７はハブ輪本体３０の外径面３０ａに弾接するよう構成されている。図２において、各シールリップ１３〜１７の２点鎖線で示す部分は、これらシールリップ１３〜１７の弾性変形前の原形状を示している。これら各シールリップ１３〜１７は、全てそれぞれの前記対向面に弾接するよう形成されているが、少なくともいずれかはその対向面に近接するようにしても良い。第２シールリップ１４が弾接又は近接する第１フランジ面３２ａは第２フランジ面３２ｂよりも外輪２の軸方向端面２ｃ近いことから、第２シールリップ１４の軸Ｌ方向長さは第１シールリップ１３の軸Ｌ方向長さより小とされている。   The body-side flange surface of the flange portion 32 includes a first flange surface 32 a and a step-like second flange surface 32 b. The first flange surface 32 a is formed to extend through the curved concave surface 31 a of the rising base 31 to a position opposed to the wheel side end surface 2 c along the axis L direction of the outer ring 2. Further, the second flange surface 32 b is formed in a step shape so as to be continuous to the outer diameter side than the first flange surface 32 a and to be away from the axial end surface 2 c of the outer ring 2 in the axis L direction. The first seal lip 13 is configured to resiliently contact the second flange surface 32b. The second seal lip 14 and the axial lips 15 and 16 are configured to resiliently contact the first flange surface 32 a and the concave curved surface 31 a of the rising base 31. The radial lip 17 is configured to resiliently contact the outer diameter surface 30 a of the hub wheel main body 30. In FIG. 2, portions indicated by two-dot chain lines of the seal lips 13 to 17 show original shapes of the seal lips 13 to 17 before elastic deformation. Each of the seal lips 13 to 17 is formed so as to resiliently contact each of the facing surfaces, but at least one of them may be in proximity to the facing surface. Since the first flange surface 32a on which the second seal lip 14 elastically contacts or approaches is closer to the axial end face 2c of the outer ring 2 than the second flange surface 32b, the length in the axial L direction of the second seal lip 14 is the first seal It is smaller than the length in the axial L direction of the lip 13.

前記のように構成されるベアリングシール８は、図１及び図２に示すように軸受装置１における外輪２及び内輪５間のフランジ部３２側の隙間に装着される。即ち、当該ベアリングシール８を構成する芯金９の円筒部９ａが外輪２の内径部２ｂに嵌合され、この嵌合状態では芯金９の外向鍔部９ｃが外輪２の車輪側端面２ｃに当接される。ベアリングシール８は、白抜矢印ａのように芯金９の円筒部９ａの延長線上のシール体基部１１に治具（不図示）が宛てがわれて嵌合される。この時、第２シールリップ１４が外輪２の内径部２ｂより径方向外側に位置しているから、第２シールリップ１４が嵌合作業の邪魔にならず、第２シールリップ１４が治具によって傷つくことがない。シール体基部１１の一部は、外向鍔部９ｃの外径側端部９ｃｂを回り込んで段差面９ｃｃを覆うように形成されているため、外向鍔部９ｃが車輪側端面２ｃに当接した状態において、外輪２の車輪側端面２ｃと段差面９ｃｃとの間に圧縮状態で介在される。したがって、外部からの泥水等が芯金９と外輪２との嵌合部に浸入することが防止される。内輪５が軸Ｌ回りに回転すると、各シールリップ１３〜１７は、内輪５のそれぞれの前記各対向面に対して弾性的に相対摺接する。このように各シールリップ１３〜１７が内輪５に対して弾性的に相対摺接することによって、外部からの泥水等の軸受空間Ｓ内への浸入、或は、軸受空間Ｓ内に充填される潤滑剤の漏出が防止される。特に、シール体１０には、堰部１２が、軸Ｌ方向に直交し外輪２の外径部２ｄより径方向外側に延びるように形成されているから、外輪２の外径部２ｄを伝う泥水等がフランジ部３２と堰部１２との間に浸入し難くなる。したがって、フランジ部３２と堰部１２との間に浸入する泥水等の量が抑制される。しかも、堰部１２の外径側端部１２ａが、第１シールリップ１３の外周１３ａより径方向外側に位置するから、第１シールリップ１３に向かって直接泥水等が流れ込むことが抑制される。これによって、第１シールリップ１３の先端部と第２フランジ面３２ｂとの間に塵埃等が噛み込むことが少なくなり、摺接に伴う第１シールリップ１３の先端部の摩耗が抑えられ、第１シールリップ１３及びベアリングシール８の長寿命化が図られる。   The bearing seal 8 configured as described above is mounted in the gap on the flange portion 32 side between the outer ring 2 and the inner ring 5 in the bearing device 1 as shown in FIGS. 1 and 2. That is, the cylindrical portion 9a of the cored bar 9 constituting the bearing seal 8 is fitted to the inner diameter portion 2b of the outer ring 2, and in this fitted state, the outward flange portion 9c of the cored bar 9 is on the wheel side end face 2c of the outer ring 2 It is abutted. A jig (not shown) is attached to the seal seal base 11 on the extension of the cylindrical portion 9 a of the core metal 9 as shown by the white arrow a. At this time, since the second seal lip 14 is positioned radially outward of the inner diameter portion 2 b of the outer ring 2, the second seal lip 14 does not interfere with the fitting operation, and the second seal lip 14 is removed by a jig. I will not get hurt. Since a part of the seal body base 11 is formed to wrap around the outer diameter side end 9cb of the outward flange portion 9c to cover the step surface 9cc, the outward ridge portion 9c is in contact with the wheel side end surface 2c In the state, it is interposed in a compressed state between the wheel side end face 2c of the outer ring 2 and the step surface 9cc. Therefore, it is prevented that the muddy water etc. from the outside infiltrate into the fitting part of the metal core 9 and the outer ring 2. When the inner ring 5 rotates around the axis L, the seal lips 13 to 17 elastically come into sliding contact with the opposing surfaces of the inner ring 5. As described above, when the seal lips 13 to 17 elastically come into sliding contact with the inner ring 5, infiltration of mud water or the like from the outside into the bearing space S or lubrication filled in the bearing space S Prevents agent leakage. In particular, since the flange portion 12 is formed on the seal body 10 so as to extend in the radial direction outward from the outer diameter portion 2 d of the outer ring 2 at right angles to the axis L direction, muddy water running along the outer diameter portion 2 d of the outer ring 2 And the like are less likely to infiltrate between the flange portion 32 and the flange portion 12. Therefore, the amount of muddy water or the like which infiltrates between the flange portion 32 and the ridge portion 12 is suppressed. In addition, since the outer diameter side end 12a of the collar 12 is located radially outward of the outer periphery 13a of the first seal lip 13, the flow of muddy water etc. directly toward the first seal lip 13 is suppressed. As a result, dust and the like are less likely to be caught between the tip of the first seal lip 13 and the second flange surface 32b, and wear of the tip of the first seal lip 13 due to sliding contact is suppressed. (1) The service life of the seal lip 13 and the bearing seal 8 can be extended.

図例のようにフランジ部３２の車体側フランジ面が第１フランジ面３２ａ及び第２フランジ面３２ｂからなる場合、通常、第１フランジ面３２ａはハブ輪本体３０の外径面３０ａ及び立上基部３１の凹曲面３１ａと共に研磨加工されるが、第２フランジ面３２ｂは研磨されない。そのため、第２フランジ面３２ｂは第１フランジ面３２ａよりも粗くなり、第１シールリップ１３は、塵埃等を噛み込むと、その先端部が摺接に伴い摩耗する虞が助長される。しかし、本実施形態では、前記のように堰部１２によって塵埃等の噛み込みが抑えられるから、噛み込みによる摩耗の助長が抑えられる。また、本実施形態の場合、第１シールリップ１３に加えて第２シールリップ１４が設けられているため、外部から泥水等の軸受空間Ｓ内への浸入がより効果的に防止される。加えて、第２シールリップ１４は研磨された第１フランジ面３２ａに弾接するから、弾性的摺接に伴う内輪５の回転トルクの増大が抑えられる。そして、仮に、第１シールリップ１３及び第２シールリップ１４と第２フランジ面３２ｂ及び第１フランジ面３２ａとの弾接部を泥水等が通過しても、その浸入方向の下流側には、さらに３個のシールリップ１５，１６，１７が内輪５に弾接しているから、軸受空間Ｓ内への泥水等の浸入が阻止される。   When the vehicle body side flange surface of the flange portion 32 comprises the first flange surface 32a and the second flange surface 32b as illustrated, the first flange surface 32a usually corresponds to the outer diameter surface 30a and the rising base of the hub wheel main body 30. The second flange surface 32 b is not polished although it is polished together with the concave curved surface 31 a of 31. Therefore, the second flange surface 32b becomes rougher than the first flange surface 32a, and when the first seal lip 13 bites in dust or the like, the risk that the tip end will wear due to sliding contact is promoted. However, in the present embodiment, since the biting of dust and the like is suppressed by the collar portion 12 as described above, the promotion of wear due to the biting is suppressed. Further, in the case of the present embodiment, since the second seal lip 14 is provided in addition to the first seal lip 13, the entry of mud water or the like into the bearing space S from the outside is more effectively prevented. In addition, since the second seal lip 14 elastically contacts the polished first flange surface 32a, an increase in the rotational torque of the inner ring 5 due to the elastic sliding contact can be suppressed. And even if muddy water etc. pass through the elastic contact part of the 1st seal lip 13 and the 2nd seal lip 14 and the 2nd flange side 32b and the 1st flange side 32a, on the downstream side of the penetration direction, Further, since the three seal lips 15, 16 and 17 are in elastic contact with the inner ring 5, entry of mud water or the like into the bearing space S is prevented.

図３は、本発明に係る密封装置の第二の実施形態を示す。本実施形態の密封装置としてのベアリングシール８Ａは、第２フランジ面３２ｂに弾接する第１シールリップ１３が複数（本実施形態では２個）ある点で、第一の実施形態のベアリングシール８と異なる。この例でも、堰部１２の外径側端部１２ａは、最も外径側の第１シールリップ１３の外周１３ａより径方向外側に位置している。したがって、第１シールリップ１３が増えることによって、より密封性が高められる。しかし、第２フランジ面３２ｂの表面状態や第１シールリップ１３の弾接状態によっては、内輪５の回転トルクが増大することがあり、密封性と回転トルクとの関係において、要求される仕様に応じて、両ベアリングシール８，８Ａが適宜選択採用される。
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、その説明を割愛する。 FIG. 3 shows a second embodiment of the sealing device according to the invention. The bearing seal 8A as the sealing device of the present embodiment is different from the bearing seal 8 of the first embodiment in that there are a plurality (two in the present embodiment) of the first seal lip 13 resiliently contacting the second flange surface 32b. It is different. Also in this example, the outer diameter side end 12a of the collar 12 is located radially outward of the outer periphery 13a of the first seal lip 13 on the outermost side. Therefore, the sealing performance is further enhanced by increasing the first seal lip 13. However, depending on the surface condition of the second flange surface 32 b and the resilient contact condition of the first seal lip 13, the rotational torque of the inner ring 5 may increase. Accordingly, the two bearing seals 8 and 8A are appropriately selected and adopted.
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 thereof will be 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。本実施形態の密封装置としてのベアリングシール８Ｂは、第１シールリップ１３が２個ある点で第二の実施形態のベアリングシール８Ａと共通するが、２個の第１シールリップ１３が第２フランジ面３２ｂに近接し、第２シールリップ１４が第１フランジ面３２ａに近接する点で、同ベアリングシール８Ａと異なる。このように、第１シールリップ１３，１３及び第２シールリップ１４がそれぞれ、第２フランジ面３２ｂ、第１フランジ面３２ａに近接することから、そのラビリンス効果によって、外部から軸受空間Ｓ内への泥水等の浸入防止が効果的になされる。この場合、第１及び第２シールリップ１３，１４が内輪５に対して近接しているだけであるから、これらシールリップ１３，１４による内輪５の回転トルクの増大はなく、前記と同様、要求される仕様に応じて、両ベアリングシール８Ａ，８Ｂが適宜選択採用される。
その他の構成は第２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。 FIG. 4 shows a third embodiment of a sealing device according to the invention. The bearing seal 8B as the sealing device of the present embodiment is common to the bearing seal 8A of the second embodiment in that there are two first seal lips 13, but the two first seal lips 13 have a second flange. It differs from the bearing seal 8A in that it is close to the surface 32b and the second seal lip 14 is close to the first flange surface 32a. As described above, since the first seal lips 13 and 13 and the second seal lip 14 approach the second flange surface 32 b and the first flange surface 32 a, respectively, the labyrinth effect causes the inside of the bearing space S from the outside. Effective prevention of infiltration of mud water etc. In this case, since the first and second seal lips 13 and 14 are only in proximity to the inner ring 5, there is no increase in the rotational torque of the inner ring 5 due to the seal lips 13 and 14, and the demand is the same as above. Both bearing seals 8A and 8B are appropriately selected and adopted according to the specifications to be made.
Since the other configuration is the same as that of the second embodiment, the same reference numerals are given to the common parts, and the description thereof will be 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。本実施形態の密封装置としてのベアリングシール８Ｃは、第２フランジ面３２ｂに弾接するシールリップ１３が２個ある点で、第二の実施形態のベアリングシール８Ａと共通する。しかし、芯金９が外向鍔部９ｃの外径側端部９ｃｂより車体側に延びる第２円筒部９ｄを有している点、当該第２円筒部９ｄが外輪２の外径部２ｄに嵌合されている点、シール体１０のシール体基部１１がこの第２円筒部９ｄの外径面９ｄａを覆うように構成されている点で、第二の実施形態のベアリングシール８Ａと異なる。シール体基部１１は、さらに、第２円筒部９ｄの車体側端縁部９ｄｂを回り込んで、外輪２の外径部２ｄとの嵌合面に形成された段差面９ｄｃを覆っている。第２円筒部９ｄと外輪２との嵌合状態では、段差面９ｄｃを覆うシール体基部１１の一部が、外輪２の外径部２ｄと段差面９ｄｃとの間に圧縮状態で介在される。本実施形態では、芯金９が、外輪２の内径部２ｂ及び外径部２ｄの両方に嵌合される形状とされているから、泥水等が外部からこれら嵌合部間に浸入することが抑制される。しかも、嵌合部の入口となる段差面９ｄｃと外径部２ｄとの間にはシール体基部１１の一部が圧縮状態で介在するから、この泥水の浸入の防止がより確実になされる。そして、堰部１２は、シール体基部１１の前記外径側端部９ｃｂに対応する部分から、軸Ｌ方向に直交し外輪２の外径部２ｄより径方向外側に延びるように形成されており、前記と同様の機能を奏する。 なお、図例の外輪２の外径部２ｄは、軸Ｌ方向に沿って同径であることを示しているが、車輪側に向け漸次縮径するテーパ形状の場合もあり、この場合は、第２円筒部９ｄは、外径部２ｄに整合するテーパ形状とされる。また、図５の形態から、外輪２の内径部２ｂに嵌合する円筒部９ａを省略し、内向鍔部９ｂと外向鍔部９ｃとが連続するような芯金に変更しても良い。この場合であっても、第２円筒部９ｄは外輪２の外径部２ｄに嵌合されているため、ベアリングシール８Ｃは、外輪２に装着される。その他の構成は第２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、ここでもその説明を割愛する。 FIG. 5 shows a fourth embodiment of a sealing device according to the invention. The bearing seal 8C as the sealing device of the present embodiment is common to the bearing seal 8A of the second embodiment in that there are two seal lips 13 resiliently contacting the second flange surface 32b. However, the second cylindrical portion 9 d is fitted to the outer diameter portion 2 d of the outer ring 2 in that the core metal 9 has a second cylindrical portion 9 d extending to the vehicle body side from the outer diameter side end 9 cb of the outward flange portion 9 c. It differs from the bearing seal 8A of the second embodiment in that the seal body base 11 of the seal body 10 is configured to cover the outer diameter surface 9da of the second cylindrical portion 9d. The seal body base 11 further wraps around the vehicle-body-side end edge 9db of the second cylindrical portion 9d to cover the step surface 9dc formed on the fitting surface with the outer diameter portion 2d of the outer ring 2. When the second cylindrical portion 9d and the outer ring 2 are fitted, a portion of the seal body base 11 covering the step surface 9dc is interposed in a compressed state between the outer diameter portion 2d of the outer ring 2 and the step surface 9dc. . In the present embodiment, since the core metal 9 is shaped to be fitted to both the inner diameter portion 2b and the outer diameter portion 2d of the outer ring 2, mud water or the like may enter between the fitting portions from the outside. Be suppressed. Moreover, since a part of the seal body base 11 is interposed in a compressed state between the step surface 9dc which is the entrance of the fitting portion and the outer diameter portion 2d, the entry of the muddy water can be prevented more reliably. Then, the collar portion 12 is formed to extend from the portion corresponding to the outer diameter side end portion 9cb of the seal body base portion 11 radially outward of the outer diameter portion 2d of the outer ring 2 orthogonal to the axis L direction. , Plays the same function as described above. Although the outer diameter portion 2d of the outer ring 2 in the illustrated example indicates that the outer diameter portion 2d has the same diameter along the axis L direction, it may be a tapered shape in which the diameter gradually decreases toward the wheel side. The second cylindrical portion 9d has a tapered shape that matches the outer diameter portion 2d. Further, the cylindrical portion 9a fitted to the inner diameter portion 2b of the outer ring 2 may be omitted from the form of FIG. 5, and the core metal may be changed such that the inward flange portion 9b and the outward flange portion 9c are continuous. Even in this case, since the second cylindrical portion 9 d is fitted to the outer diameter portion 2 d of the outer ring 2, the bearing seal 8 C is attached to the outer ring 2. Since the other configuration is the same as that of the second embodiment, the same reference numerals are given to the common parts, and the description thereof is omitted here.

なお、第１シールリップ１３の形状は特に限定されず、例えば、第１シールリップ１３が軸方向に平行に延びるように形成しても良い。また、第１シールリップ１３の外周１３ａが堰部１２の外径側端部１２ａよりも内径側に位置するならば、第１シールリップ１３を堰部１２の外径側から延びるように形成しても良い。
また、前記実施形態では、堰部１２が軸Ｌ方向に直交するように延びているが、これに限らない。例えば、堰部１２がフランジ部３２に向かいつつ軸Ｌ方向に交差して延びるように形成しても良い。
さらに、前記実施形態では、本発明に係る密封装置が、自動車用の軸受装置に適用される例について述べたが、これに限らず、フランジ部を有する内側部材と該内側部材に対して相対的に軸回転する外側部材とを備えるものであれば、他の機械装置にも等しく適用可能である。また、芯金及びこれに固着されるシール体の形状も図例のものに限定されず、芯金と外輪（外側部材）との嵌合形状等も図例に限定されるものではない。さらに、アキシャルリップ１５，１６及びラジアルリップ１７の形状や数等も図例のものに限定されず、他の態様も採用可能である。また、例示した各実施形態では、いずれも第２シールリップを備えているが、第１シールリップ１３のみで、所望の密封性が得られる場合には、第２シールリップをなしとしても良い。 The shape of the first seal lip 13 is not particularly limited. For example, the first seal lip 13 may be formed to extend in parallel in the axial direction. If the outer periphery 13 a of the first seal lip 13 is positioned on the inner diameter side relative to the outer diameter side end 12 a of the collar 12, the first seal lip 13 is formed to extend from the outer diameter side of the collar 12. It is good.
Moreover, in the said embodiment, although the collar part 12 is extended so as to be orthogonal to the axis L direction, it does not restrict to this. For example, the collar 12 may be formed to extend in the direction of the axis L while crossing the flange 32.
Furthermore, although the sealing device according to the present invention has been described as an example applied to a bearing device for an automobile in the above embodiment, the invention is not limited thereto, and an inner member having a flange portion and a relative to the inner member The present invention is equally applicable to other mechanical devices as long as it has an outer member that pivots to. Further, the shapes of the core metal and the seal body fixed thereto are not limited to those shown in the drawings, and the fitting shapes of the core metal and the outer ring (outer member) are not limited to those shown. Furthermore, the shapes, the numbers, and the like of the axial lips 15 and 16 and the radial lip 17 are not limited to those shown in the drawings, and other embodiments are also possible. In each of the illustrated embodiments, the second seal lip is provided. However, the second seal lip may be omitted if the desired sealability can be obtained only by the first seal lip 13.

１ 軸受装置（機械装置）
２ 外輪（外側部材）
２ｂ 外輪の内径部（内周）
２ｃ 外輪の軸方向端面
２ｄ 外輪の外径部（外周）
５ 内輪（内側部材）
３２ フランジ部
８，８Ａ，８Ｂ，８Ｃ ベアリングシール（密封装置）
９ 芯金
１０ シール体
１２ 堰部
１２ａ 外径側端部
１３ 第１シールリップ
１３ａ 第１シールリップの外周
１４ 第２シールリップ
Ｌ 軸 1 Bearing device (mechanical device)
2 Outer ring (outer member)
2b Inner diameter of outer ring (inner circumference)
2c Axial end face of outer ring 2d Outer diameter of outer ring (outer circumference)
5 Inner ring (inner member)
32 Flange 8,8A, 8B, 8C Bearing seal (sealing device)
9 core metal 10 seal body 12 flange 12a outer diameter side end 13 first seal lip 13a outer periphery of first seal lip 14 second seal lip L axis

Claims (3)

連続して拡径するフランジ部を有する内側部材と該内側部材に対して相対的に軸回転する外側部材とを備える機械装置に用いられ、前記外側部材に装着されて前記外側部材及び内側部材間の前記フランジ部側の隙間を密封する密封装置であって、
前記外側部材に取付けられる芯金と、前記芯金に固着されるシール体とを備え、
前記シール体は、前記外側部材の外周より外径側に延びる堰部と、該堰部から前記フランジ部側に向かって延びる第１シールリップとを含み、
前記堰部は前記フランジ部に非接触であり、前記第１シールリップより厚みが大とされ、
前記堰部の外径側端部は、前記第１シールリップの外周より径方向外側に位置し、
前記シール体には、さらに第２シールリップが、前記第１シールリップよりも径方向内側であって前記外側部材の内周よりも径方向外側に位置するように設けられていることを特徴とする密封装置。 It is used in a mechanical apparatus comprising an inner member having a flange portion which continuously expands in diameter and an outer member which rotates relative to the inner member, and is attached to the outer member and between the outer member and the inner member A sealing device for sealing the gap on the side of the flange portion of
A cored bar attached to the outer member, and a seal body fixed to the cored bar;
The seal body includes a collar portion extending outward from an outer periphery of the outer member, and a first seal lip extending from the collar portion toward the flange portion.
The flange portion is not in contact with the flange portion, and is thicker than the first seal lip,
The outer diameter side end of the flange portion is located radially outward of the outer periphery of the first seal lip ,
The seal body is further provided with a second seal lip so as to be positioned radially inward of the first seal lip and radially outward of the inner periphery of the outer member. Sealing device. 連続して拡径するフランジ部を有する内側部材と該内側部材に対して相対的に軸回転する外側部材とを備える機械装置に用いられ、前記外側部材に装着されて前記外側部材及び内側部材間の前記フランジ部側の隙間を密封する密封装置であって、
前記外側部材に取付けられる芯金と、前記芯金に固着されるシール体とを備え、
前記シール体は、前記外側部材の外周より外径側に延びる堰部と、該堰部から前記フランジ部側に向かって延びる第１シールリップとを含み、
前記堰部は前記フランジ部に非接触であり、前記第１シールリップより厚みが大とされ、
前記堰部の外径側端部は、前記第１シールリップの外周より径方向外側に位置し、
前記第１シールリップは、その外径側の面が、基端部から先端部に向け拡径するように傾斜していることを特徴とする密封装置。 It is used in a mechanical apparatus comprising an inner member having a flange portion which continuously expands in diameter and an outer member which rotates relative to the inner member, and is attached to the outer member and between the outer member and the inner member A sealing device for sealing the gap on the side of the flange portion of
A cored bar attached to the outer member, and a seal body fixed to the cored bar;
The seal body includes a collar portion extending outward from an outer periphery of the outer member, and a first seal lip extending from the collar portion toward the flange portion.
The flange portion is not in contact with the flange portion, and is thicker than the first seal lip,
The outer diameter side end of the flange portion is located radially outward of the outer periphery of the first seal lip ,
The sealing device according to the first aspect of the present invention, wherein the first seal lip is inclined such that the outer diameter side surface thereof is expanded in diameter from the proximal end to the distal end . 連続して拡径するフランジ部を有する内側部材と該内側部材に対して相対的に軸回転する外側部材とを備える機械装置に用いられ、前記外側部材に装着されて前記外側部材及び内側部材間の前記フランジ部側の隙間を密封する密封装置であって、
前記外側部材に取付けられる芯金と、前記芯金に固着されるシール体とを備え、
前記シール体は、前記外側部材の外周より外径側に延びる堰部と、該堰部から前記フランジ部側に向かって延びる第１シールリップとを含み、
前記堰部は前記フランジ部に非接触であり、前記第１シールリップより厚みが大とされ、
前記堰部の外径側端部は、前記第１シールリップの外周より径方向外側に位置し、
前記堰部は、一定の厚みであるとともに、軸方向に直交するように延びていることを特徴とする密封装置。 It is used in a mechanical apparatus comprising an inner member having a flange portion which continuously expands in diameter and an outer member which rotates relative to the inner member, and is attached to the outer member and between the outer member and the inner member A sealing device for sealing the gap on the side of the flange portion of
A cored bar attached to the outer member, and a seal body fixed to the cored bar;
The seal body includes a collar portion extending outward from an outer periphery of the outer member, and a first seal lip extending from the collar portion toward the flange portion.
The flange portion is not in contact with the flange portion, and is thicker than the first seal lip,
The outer diameter side end of the flange portion is located radially outward of the outer periphery of the first seal lip ,
The sealing device is characterized in that the ridge portion has a constant thickness and extends perpendicularly to the axial direction .
JP2014095068A 2014-05-02 2014-05-02 Sealing device Active JP6526387B2 (en)

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