JP2007092779A - Seal member - Google Patents

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JP2007092779A
JP2007092779A JP2005279527A JP2005279527A JP2007092779A JP 2007092779 A JP2007092779 A JP 2007092779A JP 2005279527 A JP2005279527 A JP 2005279527A JP 2005279527 A JP2005279527 A JP 2005279527A JP 2007092779 A JP2007092779 A JP 2007092779A
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Prior art keywords
lip
seal
seal member
members
fixed
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JP2005279527A
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Japanese (ja)
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Hiroshi Terasawa
寛 寺澤
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Uchiyama Manufacturing Corp
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Uchiyama Manufacturing Corp
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Priority to JP2005279527A priority Critical patent/JP2007092779A/en
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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
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • F16C43/045—Mounting or replacing seals
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seal member having a simple structure, suppressing inversion of lip parts and securely detecting the inversion if the lip parts are inverted. <P>SOLUTION: The seal member 6 interposed on a fitting part between two members coaxially fitted comprises a cored bar 61 fitted and fixed to one of the two members; and an elastic seal lip member 62 which is provided with the plurality of lip parts 62a, 62b, 62c brought into elastically sliding contact with the opposing other member and is fixed to the cored bar 61. The plurality of lip parts 62a, 62b, 62c include the lip part 62b facing the upstream side in the fitting direction of the other member with respect to one member, and a thick raised part 62d is formed in the downstream side in the fitting direction of the elastic seal lip member 62. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、２部材間をシールするシール部材に関し、詳しくは自動車等の車輪懸架部の軸受ユニット等に同軸的に嵌合される２部材間の嵌合部に介在されるシール部材に関する。   The present invention relates to a seal member that seals between two members, and more particularly to a seal member that is interposed in a fitting portion between two members that are coaxially fitted to a bearing unit of a wheel suspension portion of an automobile or the like.

従来より、自動車等の車輪懸架部の軸受ユニットの相対回転部間に装填されたグリースの漏出を防止するために、或いはこの回転部間へ水や塵埃等が浸入しないように、外輪と内輪との間にはシール部材が介装されることが知られている。このようなシール部材は、芯金と、複数のリップ部を備え該芯金に固着されたシールリップ部材とよりなり、例えば内輪が回転し外輪が固定される軸受機構にシール部材を装着させる場合は、固定側部材（外輪）の内周に芯金を圧嵌（圧入或いは圧ばめ）して固定し、内輪を構成するハブを同軸的に固定側部材へ嵌合させ、シール部材の上記リップ部が回転側部材（内輪）へ弾性摺接されることにより、シール機能を発揮する構造となっている（図１参照）。   Conventionally, in order to prevent leakage of grease loaded between the relative rotating parts of the bearing unit of a wheel suspension part of an automobile or the like, or to prevent water or dust from entering between the rotating parts, It is known that a seal member is interposed between the two. Such a seal member includes a cored bar and a seal lip member that includes a plurality of lip portions and is fixed to the cored bar. For example, when the seal member is mounted on a bearing mechanism in which the inner ring rotates and the outer ring is fixed. Is fixed by press-fitting (press-fitting or press-fitting) a metal core to the inner periphery of the fixed side member (outer ring), and the hub constituting the inner ring is coaxially fitted to the fixed side member. The lip portion is elastically slidably contacted with the rotation side member (inner ring), thereby providing a structure that exhibits a sealing function (see FIG. 1).

しかしながら、上述のようにシール部材を外輪に固定させた後、ハブを外輪（固定側部材）へ嵌合させる際には、以下のような問題があった。図４は、従来のシール部材が採用された第３世代型ホイールベアリングの装着部の一例を示す部分縦断面図である。
該ホイールベアリングにおいて、シール部材Ｓのシールリップ部材１１１が弾性摺接され、転動体１１２の転送面とされる面は、ハブホイール１０３周面の外周面部１０４（軸方向）と凹曲面部１０４ｂを介して連続するハブフランジ１０２の車体側面であるフランジ面部１０４ａ（径方向）とで構成され、上記外周面部１０４は、外輪１０１と上記内輪の間にリテーナ（不図示）で保持される転動体１１２が介装されるように該転動体１１２の周面に応じて形成される転動体転送面１０４ｃを備えている。よって転動体転送面１０４ｃと凹曲面部１０４ｂとは段差状とされ、その間には角部１０４ｄが形成されるため、シール部材Ｓが外輪１０１に取り付けられた後、ハブ１０２、１０３を外輪１０１へ嵌合させる際に、この角部１０４ｄが、シールリップ部材１１１のうち嵌合方向（図４（ａ）の白抜矢印方向）上流側に向くリップ部１１１ｂに引っ掛かり、リップ部１１１ｂが反転して（図４（ｂ）の状態）組み付けられてしまうことがあった。 However, after the seal member is fixed to the outer ring as described above, there are the following problems when the hub is fitted to the outer ring (fixed side member). FIG. 4 is a partial longitudinal sectional view showing an example of a mounting portion of a third generation type wheel bearing in which a conventional seal member is employed.
In the wheel bearing, the seal lip member 111 of the seal member S is elastically slidably contacted, and the surface to be the transfer surface of the rolling element 112 includes the outer peripheral surface portion 104 (axial direction) of the hub wheel 103 peripheral surface and the concave curved surface portion 104b. A rolling member 112 is formed by a flange surface portion 104a (radial direction) that is a vehicle body side surface of the hub flange 102 that is continuous through the outer peripheral surface portion 104 and is held by a retainer (not shown) between the outer ring 101 and the inner ring. Is provided with a rolling element transfer surface 104c formed according to the circumferential surface of the rolling element 112. Accordingly, the rolling element transfer surface 104c and the concave curved surface portion 104b are stepped, and a corner portion 104d is formed between them, so that the hubs 102 and 103 are moved to the outer ring 101 after the seal member S is attached to the outer ring 101. When fitting, the corner 104d is caught by the lip 111b facing the upstream side of the sealing lip member 111 in the fitting direction (the white arrow direction in FIG. 4A), and the lip 111b is reversed. (The state of FIG. 4B) may be assembled.

このようにリップ部１１１ｂが反転して組み付けられた場合、リップ部１１１ｂに曲げ応力が蓄積されたままとなるため劣化し易くなり、シール部材Ｓは本来のシール機能を発揮できず問題であった。また、外輪１０１と内輪１０２、１０３の間にシール部材Ｓが組み付けられた後は、外側からシール部材Ｓの介装状態が視認できないため、リップ部１１１ｂが反転しているか否かの判別は容易でないが、本来このようにリップ部１１１ｂが反転した状態のシール部材Ｓが介装された軸受ユニットは、不良品とされるべきものであるため、リップ部１１１ｂの反転防止及び反転検出は重要な課題であった。   Thus, when the lip part 111b is reversed and assembled, bending stress remains accumulated in the lip part 111b, so that the lip part 111b is likely to deteriorate, and the seal member S cannot exhibit its original sealing function. . In addition, after the seal member S is assembled between the outer ring 101 and the inner rings 102 and 103, since the interposition state of the seal member S cannot be visually recognized from the outside, it is easy to determine whether or not the lip portion 111b is reversed. However, since the bearing unit in which the seal member S in which the lip portion 111b is reversed as described above is supposed to be a defective product, it is important to prevent and detect the lip portion 111b from being reversed. It was a challenge.

そこで、リップ部の反転を防止するため、組み付けられる側の構造やシールリップ部材の形状に工夫を凝らしたものや、シール部材を２部材間へ介装した後にリップ部の反転を確実に検出可能なものが下記特許文献において開示されている。
例えば組み付けられる側、すなわち上述の例でいえば内輪側の転動体転送面の構造を工夫した例として、下記特許文献１には、第１内側部材の軌道面の軸方向外側隣接部に、転動体が第１内側部材の軌道面内（転送面）に組込まれる時に乗り上げて通過できるこの軌道面底径よりも大径の凸部を形成して、転動体が凸部の平坦面上に乗り上げたときに、シールの主リップが周状肩部に軽く接触するか僅かの隙間をもって組込まれるものが開示されている。またシールリップ部材の形状を工夫した例として、下記特許文献２は、副リップの外周傾斜面の円周方向複数ヶ所に突起を形成し、軸挿入時の副リップの反転を防止した例が開示されている。 Therefore, in order to prevent reversal of the lip part, it is possible to reliably detect reversal of the lip part after elaborating the structure of the side to be assembled and the shape of the seal lip member, or after the seal member is interposed between two members Are disclosed in the following patent documents.
For example, as an example in which the structure of the rolling element transfer surface on the side to be assembled, that is, the inner ring side in the above example, is devised, the following Patent Document 1 discloses that the rolling contact surface of the first inner member is adjacent to the outer side in the axial direction. A convex part having a diameter larger than the bottom diameter of the raceway surface that can be ridden and passed when the moving body is incorporated in the raceway surface (transfer surface) of the first inner member is formed, and the rolling element runs on the flat surface of the convex part. The main lip of the seal is lightly in contact with the circumferential shoulder or is incorporated with a slight gap. Further, as an example in which the shape of the seal lip member is devised, Patent Document 2 below discloses an example in which protrusions are formed at a plurality of locations in the circumferential direction of the outer peripheral inclined surface of the sub lip to prevent the sub lip from reversing when the shaft is inserted. Has been.

次いで、リップ部の反転を確実に検出できるシール部材として、下記特許文献３には、主リップの外周縁に所要の間隔で縦方向に多数の切欠きを設けたもの、 下記特許文献４には、リップ部の反転時に空気圧の通路となる突起を設けると共に、リップ部の反転検出時加圧流体の圧力により流動しない固形状の潤滑層をリップ部の内周面に設けたものが開示されている。
特開平１１−２１０７７０号公報 特開２００４‐３０１１９４号公報 実用登録第３００７４４６号公報 特開平６−１９３７４１号公報 Next, as a sealing member that can reliably detect the reversal of the lip portion, the following Patent Document 3 includes a plurality of notches provided in the longitudinal direction at a required interval on the outer periphery of the main lip. In addition, a protrusion is provided that becomes a pneumatic passage when the lip portion is reversed, and a solid lubricating layer that does not flow due to the pressure of the pressurized fluid when the lip portion is detected is provided on the inner peripheral surface of the lip portion. Yes.
Japanese Patent Laid-Open No. 11-210770 JP 2004-301194 A Utility registration No. 3007446 JP-A-6-193741

しかしながら、上記特許文献１に示されるものは、第一内側部材（ハブホイール）の形状の変更を要するため大掛かりなものといえ、また上記特許文献２に示されるものは、リップ部の形状が複雑で組付けに手間がかかるものであった。
さらに上記特許文献３、４は、リップ部に溝の加工を要したり、固形状の潤滑層を設ける必要があるため、コスト高になる傾向があるものであった。 However, what is shown in Patent Document 1 is a large-scale one because the shape of the first inner member (hub wheel) needs to be changed, and what is shown in Patent Document 2 is complicated in the shape of the lip portion. It took time to assemble.
Further, in Patent Documents 3 and 4, it is necessary to process a groove in the lip portion or to provide a solid lubricating layer, which tends to increase the cost.

なお、特許文献３及び４に記載されているリップ部の反転検出の検査方法は、エアリークテストによりなされるものが開示されているが、その他に軸受部の回転側部材の回転トルクチェックすることにより、トルクの変動からリップ部の反転を検出するものが知られている。しかしながら、この検出方法では、図４（ｂ）のような反転具合では、顕著なトルクの変化は現れず、判定が難しいという問題があった。   In addition, although the inspection method of the inversion detection of the lip part described in Patent Documents 3 and 4 is disclosed by an air leak test, in addition, by checking the rotational torque of the rotation side member of the bearing part A device that detects the reversal of the lip portion from a variation in torque is known. However, this detection method has a problem that it is difficult to make a determination because no significant torque change appears in the inversion state as shown in FIG.

本発明は、上記実情に鑑みなされたものであり、簡易な構成でありながら、リップ部の反転を生じにくくすると共に、反転を生じた場合は、反転を確実に検出可能なシール部材を提供することを目的としている。   The present invention has been made in view of the above circumstances, and provides a seal member that has a simple configuration and makes it difficult for the lip portion to be reversed and can reliably detect the reversal when the lip is reversed. The purpose is that.

請求項１の発明に係るシール部材は、同軸的に嵌合される２部材間における該嵌合部に介在されるシール部材であって、上記２部材の一方の部材に嵌合固着される芯金と、相対する他方の部材に弾性摺接するリップ部を備え上記芯金に固着された弾性シールリップ部材とよりなり、上記リップ部は、上記他方の部材の上記一方の部材に対する嵌合方向上流側に向くリップ部を含み、弾性シールリップ部材の上記嵌合方向下流側には***肉厚部が形成されていることを特徴とする。   The seal member according to the first aspect of the present invention is a seal member interposed in the fitting portion between two members fitted coaxially, and a core fitted and fixed to one of the two members. And an elastic seal lip member fixed to the core bar, the lip portion being upstream of a fitting direction of the other member with respect to the one member. A protruding thick portion is formed on the downstream side in the fitting direction of the elastic seal lip member.

請求項２の発明に係るシール部材は、肉厚部は、上記２部材の嵌合時におけるリップ部の上記嵌合方向下流側への屈曲変形を阻止するよう機能すると共に、該リップ部によって押圧されてもその形状がほぼ維持されるものであることを特徴とする。請求項３の発明に係るシール部材は、請求項１又は２に記載のシール部材において、上記シールリップ部材は、ゴム材からなり、上記芯金に対して、ゴム材の加硫成形により一体固着形成されたものであることを特徴とする。請求項４の発明に係るシール部材は、請求項１乃至請求項３のいずれかに記載のシール部材において、上記２部材は、軸受ユニットを構成する回転側部材及び固定側部材であることを特徴とする。   In the sealing member according to the invention of claim 2, the thick portion functions to prevent bending deformation of the lip portion toward the downstream side in the fitting direction when the two members are fitted, and is pressed by the lip portion. Even if it is done, the shape is maintained substantially. The seal member according to a third aspect of the present invention is the seal member according to the first or second aspect, wherein the seal lip member is made of a rubber material and is integrally fixed to the core metal by vulcanization molding of the rubber material. It is formed. The seal member according to a fourth aspect of the present invention is the seal member according to any one of the first to third aspects, wherein the two members are a rotation side member and a fixed side member constituting a bearing unit. And

請求項１の発明に係るシール部材によれば、肉厚部の抑止力により、リップ部の反転が起こりにくく、反転が起こったとしても、簡易な構成でありながら、２部材の嵌合時に該リップ部が反転して組み付けられた場合に、***した肉厚部の反力によりリップ部は行き場をなくし、リップ部が他方の部材に強く弾接された状態となるため、トルクチェックによる反転検出検査の際に、トルク値が反転していない場合と比べて顕著に高い値を示すので、リップ部の反転を確実に検出することができる。また製造工程が増えることもなく、シール部材の取付手順は従来のままとすることができ、コストアップの懸念もない。   According to the sealing member of the first aspect of the present invention, the lip portion is less likely to be reversed due to the depressing force of the thick portion. When the lip part is reversed and assembled, the lip part disappears due to the reaction force of the raised thick part, and the lip part is in a state of being strongly elastically contacted with the other member. In the inspection, since the torque value is remarkably higher than that in the case where the torque value is not reversed, the reversal of the lip portion can be reliably detected. Further, the number of manufacturing steps is not increased, the procedure for attaching the seal member can be kept as it is, and there is no concern about cost increase.

請求項２の発明に係るシール部材によれば、２部材の嵌合時においてリップ部が反転し、該リップ部によって肉厚部が押圧されても、肉厚部の反力によりリップ部の嵌合方向下流側への屈曲変形（反転）を阻止するよう機能する。また肉厚部は、該リップ部が反転してリップ部によって押圧されてもその形状がほぼ維持されるものであるので、その反力によって、リップ部は行き場をなくし、リップ部が他方の部材に強く弾接された状態となる。よって、回転側部材の回転トルクが大となり、トルクチェックによる反転検出検査の際に、トルク値が反転していない場合と比べて顕著に高い値を示すため、リップ部の反転を確実に検出することができる。また製造工数が増えることもなく、取付手順は従来のままとすることができ、更にコストアップの懸念もない。   According to the sealing member of the second aspect of the present invention, even when the lip portion is reversed when the two members are fitted and the thick portion is pressed by the lip portion, the fitting of the lip portion is caused by the reaction force of the thick portion. It functions to prevent bending deformation (inversion) toward the downstream side in the direction of engagement. Also, the thick part is almost maintained even when the lip part is reversed and pressed by the lip part, so the reaction force causes the lip part to lose its place and the lip part is the other member. It will be in a state of being elastically touched by. Therefore, the rotational torque of the rotation side member becomes large, and the reversal detection inspection by the torque check shows a significantly higher value than the case where the torque value is not reversed, so the reversal of the lip portion is reliably detected. be able to. Further, the number of manufacturing steps is not increased, the mounting procedure can be kept as it is, and there is no concern about cost increase.

請求項３の発明に係るシール部材によれば、シールリップ部材は、ゴム材からなり、上記芯金に対して、ゴム材の加硫成形により一体固着形成されたものとすることができるので、接着剤を要することなくシールリップ部材と芯金とを一体固着することができる。
請求項４の発明に係るシール部材によれば、当該シール部材は自動車等の車輪懸架部における軸受ユニット等へ介装されるシール部材に適用されるので、軸受ユニット等にシール部材を組み付けた後、外側からリップ部の反転が視認できない場合においても、トルクチェックによりリップ部の反転を確実に判別できるので、本来不良品とすべき軸受ユニット等の流出を防ぐことができる。 According to the seal member of the invention of claim 3, the seal lip member is made of a rubber material, and can be integrally fixed to the cored bar by vulcanization molding of the rubber material. The seal lip member and the cored bar can be integrally fixed without requiring an adhesive.
According to the seal member of the invention of claim 4, since the seal member is applied to a seal member interposed in a bearing unit or the like in a wheel suspension part of an automobile or the like, after the seal member is assembled to the bearing unit or the like Even when the reversal of the lip portion cannot be visually recognized from the outside, the reversal of the lip portion can be reliably determined by the torque check, so that it is possible to prevent the bearing unit or the like that should be regarded as a defective product from flowing out.

以下に本発明の最良の実施の形態について、図面に基づいて説明する。図１は、本発明のシール部材が採用された軸受ユニットの組付要領を示す縦断面図であり、図２（ａ）及び（ｂ）は、図１におけるＸ部の拡大図、図３は同実施例の変形例を示す同様図である。
図１は、自動車の車輪を転がり軸受ユニット（第３世代型ホイールベアリング）１により支持する構造の一例を示すものであり、車体の懸架装置（不図示）に取付固定された外輪（固定側部材）４へハブ（回転側部材）２を嵌合させる前の状態を示している。

内輪部材２４と共に内輪を構成するハブ２は、とハブホイール２２とその一端に径方向外向きに連なるハブフランジ２１とよりなり、外輪４へ該ハブ２を嵌合させた後に、ハブフランジ２１にボルトによりタイヤホイール（不図示）が固定される。また３はハブ２に形成されたスプライン軸孔であり、ここに駆動シャフト（不図示）がスプライン嵌合されて、該駆動シャフトの回転駆動力がタイヤホイールに駆動伝達される。外輪４と上記内輪（ハブ２及び内輪部材２４）との間には２列の転動体（玉）５・・がリテーナ５１で保持された状態で介装され、該転動体５の転動部に装填される潤滑剤（グリース等）の漏出或いは外部からの泥や水等の浸入を防止するためのシール部材６、７が外輪４と上記内輪の間に介装されている。
なお、ここでは内輪（ハブ２及び内輪部材２４）回転、外輪４固定の例を示しているが、これに限らず、内輪固定、外輪回転の軸受機構にも、本願発明は適用可能である。 The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing the assembly procedure of a bearing unit in which the seal member of the present invention is adopted. FIGS. 2 (a) and 2 (b) are enlarged views of a portion X in FIG. It is the same figure which shows the modification of the Example.
FIG. 1 shows an example of a structure in which a wheel of an automobile is supported by a rolling bearing unit (third generation type wheel bearing) 1, and an outer ring (fixed side member) attached and fixed to a suspension device (not shown) of a vehicle body. ) A state before the hub (rotation side member) 2 is fitted to 4 is shown.

The hub 2 that constitutes the inner ring together with the inner ring member 24 is composed of a hub wheel 22 and a hub flange 21 that is radially outwardly connected to one end of the hub wheel 22, and after the hub 2 is fitted to the outer ring 4, A tire wheel (not shown) is fixed by a bolt. Reference numeral 3 denotes a spline shaft hole formed in the hub 2, and a drive shaft (not shown) is spline-fitted therein, and the rotational driving force of the drive shaft is transmitted to the tire wheel. Two rows of rolling elements (balls) 5 are interposed between the outer ring 4 and the inner ring (hub 2 and inner ring member 24) while being held by a retainer 51. Seal members 6 and 7 are interposed between the outer ring 4 and the inner ring to prevent leakage of lubricant (grease or the like) loaded in the cylinder or intrusion of mud or water from the outside.
Here, an example of rotation of the inner ring (hub 2 and inner ring member 24) and fixing of the outer ring 4 is shown, but the present invention is not limited to this and can be applied to a bearing mechanism of inner ring fixing and outer ring rotation.

図２（ａ）（ｂ）は、反車体側シール部材の装着部の拡大断面図であり、図２（ａ）の矢印は、外輪４へ嵌合されるハブ２の嵌合方向を示しており、図２（ｂ）はリップ部が反転して組み付けられた状態を示している。シール部材６のシールリップ部材６２が弾性摺接され、転動体５と転送される面は、ハブホイール２２周面の外周面部２３（軸方向）と凹曲面部２３ｂを介して連続するハブフランジ２１の車体側面であるフランジ面部２３ａ（径方向）とで構成され、上記外周面部２３は、外輪４と上記内輪の間にリテーナ５１で保持される転動体５が介装されるように該転動体４の側面に応じて形成される転動体転送面２３ｃを備えており、転動体転送面２３ｃと凹曲面部２３ｂとは段差状とされ、その間には角部２３ｄが形成される。
外輪４と内輪の間に介装されるシール部材６は、外輪４の内周（内径面）に一体嵌合される芯金６１と、ゴム等の弾性材からなり、内輪に相対摺接する複数のリップ部を備え芯金６１に固着された弾性シールリップ部材６２とよりなる。
ここで、芯金６１は圧延鋼板或いはステンレス鋼板等の金属板製で、板金加工して形成されるが、不錆性のＳＵＳや防錆処理が施された鋼板を用いれば、錆の発生を防ぐことができ、望ましい。またシールリップ部材６２は、ＮＢＲ、Ｈ−ＮＢＲ、ＡＣＭ、ＡＥＭ、ＦＫＭ等を中心とするゴム等の弾性材が採用され、芯金６１に対して、これらの弾性材の加硫成型等により貼着一体される。上記弾性材の他、弾性を有する軟プラスチック類を採用してもよく、これを射出成型し、芯金６１に貼着するものとしてもよい。 2A and 2B are enlarged cross-sectional views of the mounting portion of the anti-vehicle body side seal member, and the arrows in FIG. 2A indicate the fitting direction of the hub 2 fitted to the outer ring 4. FIG. 2 (b) shows a state in which the lip portion is inverted and assembled. The seal lip member 62 of the seal member 6 is elastically slidably contacted, and the surface transferred to the rolling element 5 has a hub flange 21 that is continuous via the outer peripheral surface portion 23 (axial direction) of the peripheral surface of the hub wheel 22 and the concave curved surface portion 23b. The outer peripheral surface portion 23 is configured such that a rolling element 5 held by a retainer 51 is interposed between the outer ring 4 and the inner ring. The rolling element transfer surface 23c is formed according to the four side surfaces, the rolling element transfer surface 23c and the concave curved surface portion 23b are stepped, and a corner portion 23d is formed therebetween.
The seal member 6 interposed between the outer ring 4 and the inner ring is composed of a cored bar 61 integrally fitted to the inner periphery (inner diameter surface) of the outer ring 4 and an elastic material such as rubber, and a plurality of the sliding members relatively slidingly contact the inner ring. And an elastic seal lip member 62 fixed to the cored bar 61.
Here, the cored bar 61 is made of a metal plate such as a rolled steel plate or a stainless steel plate, and is formed by sheet metal processing. However, if a non-rusting SUS or a rust-proof steel plate is used, rust is generated. Can be prevented and desirable. The seal lip member 62 is made of an elastic material such as rubber centered on NBR, H-NBR, ACM, AEM, FKM, etc., and is affixed to the core metal 61 by vulcanization molding of these elastic materials. It is worn together. In addition to the elastic material, soft plastics having elasticity may be adopted, which may be injection molded and adhered to the cored bar 61.

図例のシールリップ部材６２は、リップ部６２ａ、６２ｂ、６２ｃを３つ備えており、夫々のリップ部の先端がフランジ面部２３ａ、凹曲面部２３ｂに弾性摺接するよう形成されており、嵌合方向（図２（ａ）の白抜矢印方向）上流側に向く主リップ部６２ｂを備えており、シールリップ部材６２の嵌合方向下流側には***した肉厚部６２ｄが形成されている。該肉厚部６２ｄは、ハブ２の外輪４への嵌合時における主リップ部６２ｂの嵌合方向下流側への屈曲変形（反転）を阻止するよう機能すると共に、主リップ部６２ｂ及びグリースリップ部６２ｃによって押圧されてもその形状がほぼ維持されるものである。   The illustrated seal lip member 62 includes three lip portions 62a, 62b, and 62c, and the tips of the respective lip portions are formed so as to be in elastic sliding contact with the flange surface portion 23a and the concave curved surface portion 23b. A main lip portion 62b facing upstream in the direction (the direction of the white arrow in FIG. 2 (a)) is provided, and a protruding thick portion 62d is formed on the downstream side in the fitting direction of the seal lip member 62. The thick portion 62d functions to prevent bending deformation (reversal) of the main lip portion 62b downstream in the fitting direction when the hub 2 is fitted to the outer ring 4, and the main lip portion 62b and the grease lip. Even when pressed by the portion 62c, the shape is substantially maintained.

図３は同実施例の変形例を示しており、（ａ）は２つのリップ部を備えたシール部材の例、（ｂ）は１つのリップ部を備えたシール部材の例であり、いずれも、外輪４の内周に芯金６１が固着された状態を示している。
これらの例も図２の例と同様に、嵌合方向上流側に向く主リップ部６２ｂを備えており、シールリップ部材６２の嵌合方向下流側には***した肉厚部６２ｄが形成されている。その他の構成及び作用は上記例と同様であるので、共通部分には同一の符号を付し、その説明を割愛する。 FIG. 3 shows a modification of the embodiment, in which (a) is an example of a seal member provided with two lip portions, and (b) is an example of a seal member provided with one lip portion. The state where the cored bar 61 is fixed to the inner periphery of the outer ring 4 is shown.
As in the example of FIG. 2, these examples also include a main lip portion 62b facing the upstream side in the fitting direction, and a protruding thick portion 62d is formed on the downstream side in the fitting direction of the seal lip member 62. Yes. Since other configurations and operations are the same as those in the above example, common portions are denoted by the same reference numerals and description thereof is omitted.

よって以上によれば、外輪４にシール部材６が取り付けられた後、ハブ２を外輪４へ嵌合させる際に、転動体転送面２３ｃと凹曲面部２３ｂとの間に形成される角部２３ｄに、シールリップ部材６２のうち嵌合方向（図２（ａ）の場合、その矢印方向）上流側に向く主リップ部６２ｂが引っ掛かり、主リップ部６２ｂが反転して組み付けられてしまった場合でも、***した肉厚部６２ｄの反力により主リップ部６２ｂは行き場をなくし、主リップ部６２ｂが凹曲面部２３ｂに強く弾接された状態となるため、ハブ２の回転時におけるハブ２に負荷されるトルクが大となり、トルクチェックによる反転検出検査の際に、トルク値が反転していない場合と比べて顕著に高い値を示すので、主リップ部６２ｂの反転を確実に検出することができる。   Therefore, according to the above, when the hub 2 is fitted to the outer ring 4 after the seal member 6 is attached to the outer ring 4, the corner part 23d formed between the rolling element transfer surface 23c and the concave curved surface part 23b. Even if the main lip 62b facing toward the upstream side of the seal lip member 62 in the fitting direction (in the direction of the arrow in the case of FIG. 2A) is caught and the main lip 62b is reversed and assembled. The main lip portion 62b loses its place due to the reaction force of the raised thick wall portion 62d, and the main lip portion 62b is strongly elastically contacted with the concave curved surface portion 23b, so that the load is applied to the hub 2 when the hub 2 rotates. The torque to be applied is large, and the reversal detection inspection by the torque check shows a significantly higher value than the case where the torque value is not reversed, so that the reversal of the main lip portion 62b can be reliably detected. .

実際、本発明者等の実験によれば、図例のような主リップ部６２ｂを備えたシール部材６において、当該主リップ部６２ｂが元の形状の１／８反転した状態での上記トルク値は、肉厚部６２ｄが存在しない従来品の場合と、反転していない状態のトルク値とを比較して０．９〜１．４倍であるのに対し、肉厚部６２ｄを有する本発明品の場合は、１．４〜１．８倍となることが実証されている。   Actually, according to experiments by the present inventors, in the seal member 6 having the main lip portion 62b as shown in the figure, the torque value in a state where the main lip portion 62b is inverted by 1/8 of the original shape. Compared with the case of the conventional product in which the thick part 62d does not exist and the torque value in the non-reversed state is 0.9 to 1.4 times, the present invention having the thick part 62d In the case of a product, it has been proved to be 1.4 to 1.8 times.

尚、本発明のシール部材の形状は上記実施例に限定されず、また適用例についても上記実施例に限定されず、同軸的に嵌合される２部材間の嵌合部に介在されるものであればよく、その他の軸受、軸受ユニットにも本発明が適用可能であることは言うまでもない。   The shape of the seal member of the present invention is not limited to the above embodiment, and the application example is not limited to the above embodiment, and is interposed in a fitting portion between two members fitted coaxially. Needless to say, the present invention can be applied to other bearings and bearing units.

本発明のシール部材が採用された軸受ユニットの組付要領を示す縦断面図である。It is a longitudinal cross-sectional view which shows the assembly point of the bearing unit by which the sealing member of this invention was employ | adopted. （ａ）及び（ｂ）は、図１におけるＸ部の拡大図である。(A) And (b) is an enlarged view of the X section in FIG. 図２の変形例を示す同様図である。It is the same figure which shows the modification of FIG. （ａ）及び（ｂ）は、従来のシール部材が採用された軸受ユニットの組付要領を示す部分縦断面図である。(A) And (b) is a fragmentary longitudinal cross-section which shows the assembly point of the bearing unit by which the conventional sealing member was employ | adopted.

符号の説明Explanation of symbols

１ 軸受ユニット
６ シール部材
６１ 芯金
６２ シールリップ部材
６２ａ、６２ｂ、６２ｃ リップ部
６２ｄ 肉厚部
DESCRIPTION OF SYMBOLS 1 Bearing unit 6 Seal member 61 Core metal 62 Seal lip member 62a, 62b, 62c Lip part 62d Thick part

Claims (4)

同軸的に嵌合される２部材間における当該嵌合部に介在されるシール部材であって、
上記２部材の一方の部材に嵌合固着される芯金と、相対する他方の部材に弾性摺接するリップ部を備え上記芯金に固着された弾性シールリップ部材とよりなり、
上記リップ部は、上記他方の部材の上記一方の部材に対する嵌合方向上流側に向くリップ部を含み、上記弾性シールリップ部材の上記嵌合方向下流側には***肉厚部が形成されていることを特徴とするシール部材。 A seal member interposed in the fitting portion between two members fitted coaxially,
A cored bar fitted and fixed to one of the two members, and an elastic seal lip member fixed to the cored bar having a lip portion elastically slidably contacting the other opposite member,
The lip portion includes a lip portion that faces the upstream side in the fitting direction of the other member with respect to the one member, and a raised thick portion is formed on the downstream side in the fitting direction of the elastic seal lip member. A sealing member characterized by that. 請求項１に記載のシール部材において、
上記肉厚部は、上記２部材の嵌合時におけるリップ部の上記嵌合方向下流側への屈曲変形を阻止するよう機能すると共に、該リップ部によって押圧されてもその形状がほぼ維持されるものであることを特徴とするシール部材。 The seal member according to claim 1,
The thick portion functions to prevent bending deformation of the lip portion toward the downstream side in the fitting direction when the two members are fitted, and the shape is substantially maintained even when pressed by the lip portion. A sealing member characterized by being a thing. 請求項１又は２に記載のシール部材において、
上記シールリップ部材は、ゴム材からなり、上記芯金に対して、ゴム材の加硫成形により一体固着形成されたものであることを特徴とするシール部材。 The seal member according to claim 1 or 2,
The seal lip member is made of a rubber material, and is integrally fixed to the cored bar by vulcanization molding of the rubber material. 請求項１乃至請求項３のいずれかに記載のシール部材において、
上記２部材は、軸受ユニットを構成する回転側部材及び固定側部材であることを特徴とするシール部材。 The seal member according to any one of claims 1 to 3,
The two members are a rotation side member and a fixed side member constituting a bearing unit.
JP2005279527A 2005-09-27 2005-09-27 Seal member Pending JP2007092779A (en)

Priority Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010096194A (en) * 2008-10-14 2010-04-30 Uchiyama Manufacturing Corp Sealing ring
CN102439324A (en) * 2009-05-25 2012-05-02 Skf公司 A bearing seal assembly, particularly for use in agricultural applications

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59125653A (en) * 1983-01-05 1984-07-20 Nec Corp Analog multiplexer ic
JPH11210770A (en) * 1998-01-27 1999-08-03 Koyo Seiko Co Ltd Rolling bearing unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59125653A (en) * 1983-01-05 1984-07-20 Nec Corp Analog multiplexer ic
JPH11210770A (en) * 1998-01-27 1999-08-03 Koyo Seiko Co Ltd Rolling bearing unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010096194A (en) * 2008-10-14 2010-04-30 Uchiyama Manufacturing Corp Sealing ring
CN102439324A (en) * 2009-05-25 2012-05-02 Skf公司 A bearing seal assembly, particularly for use in agricultural applications

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