JP5046185B2 - Hub unit for vehicles - Google Patents

Hub unit for vehicles Download PDF

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JP5046185B2
JP5046185B2 JP2007304869A JP2007304869A JP5046185B2 JP 5046185 B2 JP5046185 B2 JP 5046185B2 JP 2007304869 A JP2007304869 A JP 2007304869A JP 2007304869 A JP2007304869 A JP 2007304869A JP 5046185 B2 JP5046185 B2 JP 5046185B2
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vehicle
ring member
cylindrical fitting
peripheral surface
outer ring
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JP2009127778A (en
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善紀 増田
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JTEKT Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72Sealings
    • F16C33/76Sealings of ball or roller bearings
    • F16C33/78Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/783Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72Sealings
    • F16C33/76Sealings of ball or roller bearings
    • F16C33/78Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869Sealings 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
    • F16C33/7873Sealings 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
    • F16C33/7876Sealings 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14Bearings 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
    • F16C19/18Bearings 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
    • F16C19/181Bearings 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
    • F16C19/183Bearings 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
    • F16C19/184Bearings 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
    • F16C19/186Bearings 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00Articles relating to transporting
    • F16C2326/01Parts of vehicles in general
    • F16C2326/02Wheel hubs or castors

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

Description

本発明は、車両用ハブユニットに関するものである。   The present invention relates to a vehicle hub unit.

特開2006−118553号公報JP 2006-118553 A

従来、自動車にはタイヤホイールやブレーキディスクを取り付けるためのハブユニットが用いられている。このハブユニットは、車軸に一体回転可能に設けられ、タイヤホイールやブレーキディスクを固定する内輪部材と、その内輪部材のラジアル方向外側に転動体を介して非回転に配置される外輪部材と、内輪部材と外輪部材との間に形成される空間の両端(車両アウタ側と車両インナ側)に配置された防水・防塵用の摺動シール機構とを備えて構成され、自動車側に設けられたナックル(車両側組付部材)に対し外輪部材を内嵌させる形で取り付けられる(特許文献1)。   Conventionally, a hub unit for attaching a tire wheel and a brake disk is used in an automobile. The hub unit is provided so as to be rotatable integrally with an axle, and an inner ring member that fixes a tire wheel and a brake disk, an outer ring member that is disposed non-rotatingly via a rolling element on the radially outer side of the inner ring member, and an inner ring A knuckle provided on the automobile side, comprising a waterproof and dustproof sliding seal mechanism disposed at both ends (vehicle outer side and vehicle inner side) of a space formed between the member and the outer ring member The outer ring member is attached to the (vehicle side assembly member) (Patent Document 1).

上記の摺動シール機構は、通常、円環状の金属スリンガ(芯金)と、これに被膜された弾性体からなる弾性シール部とにより構成されており、外輪部材に対し軸線を同じくしてアキシャル方向に圧入されるとともに、その圧入組付け状態において内輪部材側にも弾性シール部が摺接しており、内輪部材と外輪部材との間の隙間をシールしている。   The above-mentioned sliding seal mechanism is usually composed of an annular metal slinger (core metal) and an elastic seal portion made of an elastic material coated thereon, and is axial with the same axis as the outer ring member. The elastic seal portion is also in sliding contact with the inner ring member side in the press-fitted and assembled state, and seals the gap between the inner ring member and the outer ring member.

こうした摺動シール機構の中には、圧入対象となる外輪部材と対向する形でアキシャル方向に延出する金属スリンガのアキシャル延出部と、該アキシャル延出部の外輪部材側に一体化された弾性シール部のアキシャルリップ部とにより当該外輪部材への圧入嵌合部が構成され、摺動シール機構の圧入組付け状態において該アキシャルリップ部をラジアル方向に弾性圧縮させるものがある。この摺動シール機構は、圧入嵌合部に高いシール性能が付与されるとともに、金属スリンガの精度を落として全体のコストダウンを図ることが可能となる。   In such a sliding seal mechanism, an axial extension portion of a metal slinger extending in the axial direction so as to face the outer ring member to be press-fitted, and an outer ring member side of the axial extension portion are integrated. There is a type in which the axial lip portion of the elastic seal portion constitutes a press-fitting fitting portion to the outer ring member, and the axial lip portion is elastically compressed in the radial direction in the press-fit assembly state of the sliding seal mechanism. This sliding seal mechanism provides high sealing performance to the press-fitting fitting portion, and can reduce the overall cost by reducing the accuracy of the metal slinger.

ところが、上記構成の場合、摺動シール機構を外輪部材に圧入する際に、その圧入嵌合部をアキシャル方向に押し込んで外輪部材の規定位置まで到達させても、この圧入に伴い弾性体からなるアキシャルリップ部がアキシャル方向に弾性変形するため、押し込むのを止めると同時に弾性復帰して該規定位置からアキシャル方向にずれる、いわゆるスプリングバックが生じる。このため、摺動シール機構のアキシャル方向における組み付け精度が悪化するという課題があった。   However, in the case of the above configuration, when the sliding seal mechanism is press-fitted into the outer ring member, even if the press-fitting fitting portion is pushed in the axial direction to reach the specified position of the outer ring member, it is made of an elastic body along with the press-fitting. Since the axial lip portion is elastically deformed in the axial direction, a so-called spring back is generated in which the push-in is stopped and at the same time the elastic return is made and the axial position is shifted from the specified position. For this reason, there existed a subject that the assembly | attachment precision in the axial direction of a sliding seal mechanism deteriorated.

特に、車両アウタ側の摺動シール機構は、弾性シール部の一部がアキシャル方向に突出し、その突出部の先端を内輪部材のフランジ部と摺接させ、この部分にもシール機能を有する構成をなすので、アキシャル方向への組み付け精度の悪化が、当該突出部シール性能を劣化させる惧れがある。   In particular, the sliding seal mechanism on the vehicle outer side has a configuration in which a part of the elastic seal portion protrudes in the axial direction, the tip of the protrusion is brought into sliding contact with the flange portion of the inner ring member, and this portion also has a sealing function. Therefore, the deterioration of the assembly accuracy in the axial direction may deteriorate the sealing performance of the protrusion.

本発明は、車両アウタ側摺動シール機構における圧入時のスプリングバックを抑制可能な車両用ハブユニットを提供することにある。   An object of the present invention is to provide a vehicle hub unit capable of suppressing spring back during press-fitting in a vehicle outer side sliding seal mechanism.

上記課題を解決するために、本発明の車両用ハブユニットは、
車両用ハブユニットにおいて、外輪部材と内輪部材との間に形成される転動体配置空間の車両アウタ側を封止する車両アウタ側摺動シール機構が、外輪部材の内周面に嵌合する筒状嵌着部と該筒状嵌着部の車両アウタ側端縁からラジアル方向内向きに延出する環状のシール支持部とを有した金属スリンガと、該金属スリンガのシール支持部の車両アウタ側主表面に一体化されるとともに、内輪部材の外周面に摺接する弾性高分子材料からなるシール部とを備え、さらに、
シール支持部を覆う該シール部のラジアル方向外周縁には、筒状嵌着部の外周面をアキシャル方向に覆う延長被覆部が弾性高分子材料により一体形成され、金属スリンガの筒状嵌着部が当該延長被覆部により覆われた状態で外輪部材の内周面に圧入されるとともに、筒状嵌着部と延長被覆部とを有してなる車両アウタ側摺動シール機構の外周側圧入部には、圧入される該延長被覆部の一部を弾性復帰させつつ迎え入れる逃がし部が形成され、
逃がし部は、筒状嵌着部をラジアル方向に貫通する貫通孔であり、
延長被覆部は、貫通孔内に非膨出の形で該貫通孔を被っており、
貫通孔内に非膨出の延長被覆部が、外輪部材の内周面への圧入されることにより該延長被覆部の一部が弾性復帰する形で、該貫通孔内へと膨出していることを特徴とする。
In order to solve the above problems, a vehicle hub unit according to the present invention includes:
In a vehicle hub unit, a cylinder in which a vehicle outer side sliding seal mechanism for sealing a vehicle outer side of a rolling element arrangement space formed between an outer ring member and an inner ring member is fitted to an inner peripheral surface of the outer ring member A metal slinger having a ring-shaped fitting portion and an annular seal support portion extending radially inward from a vehicle outer side end edge of the cylindrical fitting portion, and a vehicle outer side of the seal support portion of the metal slinger A seal portion made of an elastic polymer material that is integrated with the main surface and slidably contacts the outer peripheral surface of the inner ring member;
An extension covering portion that covers the outer peripheral surface of the cylindrical fitting portion in the axial direction is integrally formed of an elastic polymer material on the outer peripheral edge in the radial direction of the seal portion that covers the seal support portion, and the cylindrical fitting portion of the metal slinger Is pressed into the inner peripheral surface of the outer ring member in a state covered with the extension covering portion, and is provided on the outer periphery side press-fitting portion of the vehicle outer side sliding seal mechanism having a cylindrical fitting portion and an extension covering portion. Is formed with a relief part that welcomes a part of the extended covering part to be elastically restored,
The relief part is a through hole that penetrates the cylindrical fitting part in the radial direction,
The extension covering portion covers the through hole in a non-bulged form in the through hole,
A non-bulged extension covering portion is bulged into the through hole in such a manner that a part of the extension covering portion is elastically restored by being press-fitted into the inner peripheral surface of the outer ring member. It is characterized by that.

上記本発明の構成によると、車両アウタ側摺動シール機構の外周側圧入部には、逃がし部が設けられるので、圧入嵌合される延長被覆部(アキシャルリップ部)が当該逃がし部において非圧縮状態となって当該逃がし部内に膨出し、その膨出部がアキシャル方向に引っかかる抜け止め部として機能する。これにより、上記のようなスプリングバックを大幅に軽減することが可能となる。   According to the above configuration of the present invention, the outer peripheral side press-fit portion of the vehicle outer side sliding seal mechanism is provided with the relief portion, so that the extension covering portion (axial lip portion) to be press-fitted is not compressed in the relief portion. And bulges into the escape portion, and the bulge portion functions as a retaining portion that is hooked in the axial direction. As a result, the spring back as described above can be greatly reduced.

本発明の逃がし部の第一は、筒状嵌着部をラジアル方向に貫通し、かつラジアル方向外周側開口が延長被覆部にて被われる貫通孔として、筒状嵌着部の周方向に複数形成することができる。この構成によると、金属スリンガに貫通孔を設け、これを弾性高分子材料で被うだけで容易に形成することができる。   The first relief part of the present invention is a plurality of through holes in the circumferential direction of the cylindrical fitting part as through holes that penetrate the cylindrical fitting part in the radial direction and whose radial outer peripheral side opening is covered by the extension covering part. Can be formed. According to this configuration, the metal slinger can be easily formed simply by providing a through hole and covering it with the elastic polymer material.

貫通孔を形成する場合、延長被覆部は、筒状嵌着部の逃がし部に対応する領域にラジアル方向外向きに突出する凸部(圧入補強用凸部)を有した形状にて形成することができる。貫通孔を形成する場合、その内部への弾性高分子材料の逃げ込みにより、外輪部材と金属スリンガとの間で密着力が比較的低くなり、固定能力・シール能力が弱まる可能性がある。こうした場合、延長被覆部を、筒状嵌着部の逃がし部に対応する領域にラジアル方向外向きに突出する凸部(圧入補強用凸部)を有した形状にて形成することにより、外輪部材との密着力が強化され、固定能力・シール性能の改善を図ることができる。また、この凸部の形成領域が貫通孔に対応する領域であることで、スプリングバックの軽減も同時に実現できる。   When forming the through-hole, the extension covering portion is formed in a shape having a convex portion (press-fit reinforcement convex portion) protruding radially outward in a region corresponding to the relief portion of the cylindrical fitting portion. Can do. When the through hole is formed, the elastic polymer material escapes into the inside of the through hole, so that the adhesion force between the outer ring member and the metal slinger is relatively low, and the fixing ability and the sealing ability may be weakened. In such a case, the outer ring member is formed by forming the extended covering portion in a shape having a convex portion (press-fit reinforcement convex portion) projecting radially outward in a region corresponding to the relief portion of the cylindrical fitting portion. Can be improved and the fixing ability and sealing performance can be improved. Moreover, since the formation area of this convex part is an area | region corresponding to a through-hole, reduction of a springback is also realizable simultaneously.

また、同じく貫通孔を形成する場合で、延長被覆部は、筒状嵌着部の逃がし部に対応する領域にラジアル方向内向きに凹む凹部(逃がし促進用凹部)を有した形状にて形成することもできる。例えば、延長被覆部の厚みが大きい場合は、スプリングバックの力も大きくなるので、貫通孔だけでその力を逃がしきれない場合がある。上記のように、貫通孔だけでなく延長被覆部の外周面にも逃がし部を設けることで、延長被覆部へより多くの弾性高分子材料が逃げ込むことが可能となり、スプリングバックを大幅に軽減することができる。   Similarly, in the case of forming a through hole, the extended covering portion is formed in a shape having a concave portion (a relief promoting concave portion) recessed inward in the radial direction in a region corresponding to the relief portion of the cylindrical fitting portion. You can also. For example, when the thickness of the extension covering portion is large, the force of the spring back also increases, so that there is a case where the force cannot be released with only the through hole. As described above, by providing a relief part not only in the through-hole but also on the outer peripheral surface of the extension covering part, it becomes possible for more elastic polymer material to escape into the extension covering part, greatly reducing the spring back. be able to.

本発明の逃がし部の第二は、延長被覆部の外周面がラジアル方向内向きに凹む凹部として形成することができる。延長被覆部の外周面に逃がし部を設けることで、当該凹部が、その周辺の弾性高分子材料が逃げ込む部分となって、スプリングバックを軽減することができる。また、この構成は、延長被覆部に凹部を設けるだけで、容易に形成できる。   The second relief portion of the present invention can be formed as a recess in which the outer peripheral surface of the extension covering portion is recessed inward in the radial direction. By providing the relief portion on the outer peripheral surface of the extension covering portion, the concave portion becomes a portion into which the surrounding elastic polymer material escapes, and the spring back can be reduced. Moreover, this structure can be easily formed only by providing a recessed part in the extension coating | coated part.

本発明の逃がし部の第三は、延長被覆部の外周面においてラジアル方向外向きに突出する凸部を形成し、その凸部の周辺空間、言い換えればその凸部の基部の外周側空間として形成することができる。延長被覆部の外周面に凸部を設けることで、当該凸部の基部の外周側空間が該凸部をなす弾性高分子材料の逃げ込むことができる空間となるので、スプリングバックを軽減することができる。また、この構成は、延長被覆部に凸部を設けるだけで、容易に形成できる。また、突出する部分が設けられることで、この凸部と外輪部材との間で密着力が強化され、固定能力・シール性能の改善を図ることもできる。   The third relief portion of the present invention forms a convex portion protruding radially outward on the outer peripheral surface of the extension covering portion, and is formed as a peripheral space of the convex portion, in other words, an outer peripheral side space of the base portion of the convex portion. can do. By providing a convex part on the outer peripheral surface of the extension covering part, the outer peripheral side space of the base part of the convex part becomes a space where the elastic polymer material forming the convex part can escape, so that the spring back can be reduced. it can. Moreover, this structure can be easily formed only by providing a convex part in the extension coating part. Further, by providing the protruding portion, the adhesion force is enhanced between the convex portion and the outer ring member, and the fixing ability and the sealing performance can be improved.

本発明の逃がし部の第四は、延長被覆部の外周面においてラジアル方向外向きに突出する凸部とラジアル方向内向き凹む凹部とが隣接形成されたうちの凹部として形成することができる。延長被覆部の外周面に逃がし部と凸部を設けることで、当該凹部が、その周辺及び凸部の弾性高分子材料が逃げ込む部分となって、スプリングバックを軽減することができる。また、この構成は、延長被覆部に凹部及び凸部を設けるだけで、容易に形成できる。また、突出する部分が設けられることで、この凸部と外輪部材との間で密着力が強化され、固定能力・シール性能の改善を図ることもできる。なお、凸部と凹部とをアキシャル方向に隣接形成することができる。凸部と凹部とを周方向に隣接形成することもできる。   The fourth relief portion of the present invention can be formed as a recess in which a convex portion protruding outward in the radial direction and a concave portion recessed inward in the radial direction are adjacently formed on the outer peripheral surface of the extension covering portion. By providing the relief portion and the convex portion on the outer peripheral surface of the extension covering portion, the concave portion becomes a portion where the elastic polymer material in the periphery and the convex portion escapes, and the spring back can be reduced. Moreover, this structure can be easily formed only by providing a recessed part and a convex part in the extended covering part. Further, by providing the protruding portion, the adhesion force is enhanced between the convex portion and the outer ring member, and the fixing ability and the sealing performance can be improved. The convex portion and the concave portion can be formed adjacent to each other in the axial direction. The convex portion and the concave portion can be formed adjacent to each other in the circumferential direction.

上記した各種の逃がし部は、延長被覆部の周方向全周に連続形成することができる。この場合、全体の形状がシンプルなものとなり、製造し易くなる。   The various relief portions described above can be continuously formed on the entire circumference of the extension covering portion. In this case, the overall shape is simple and easy to manufacture.

また、逃がし部は、外周側圧入部アキシャル方向両端部を除く、それらアキシャル方向両端部の間の位置に設けることができる。また、この場合の逃がし部は、アキシャル方向両端部の間の車両インナ側の位置に設けることができる。逃がし部が外周側圧入部のアキシャル方向中間位置にあることで、逃がし部のアキシャル方向前後双方に延長被覆部との接触面が形成され、接触面積が大となる。これにより、スプリングバック時に生じる摩擦抵抗が大となるので、スプリングバックを効果的に軽減できる。 Moreover, the relief part can be provided in the position between these axial direction both ends except the axial direction both ends of an outer peripheral side press fit part. Further, in this case, the relief portion can be provided at a position on the vehicle inner side between both end portions in the axial direction. Since the relief portion is at the intermediate position in the axial direction of the outer periphery side press-fit portion, the contact surface with the extended covering portion is formed both before and after the relief portion in the axial direction, and the contact area becomes large. Thereby, since the frictional resistance generated at the time of spring back becomes large, the spring back can be effectively reduced.

また、筒状嵌着部の圧入先端側端部の外周面を圧入後端側の外周面よりもラジアル方向内向きに位置するようにしてもよい。具体的に言えば、圧入先端側端部を、外周面が圧入先端に向けて縮径するテーパー形状とすることができる。これにより、筒状嵌着部の圧入先端側端部を覆う延長被覆部におけるスプリングバックが軽減されるし、圧入も容易となる。また、テーパー面とすることで、延長被覆部と逃がし部との接触面積が大きくなり、スプリングバック時に生じる摩擦抵抗が大となるので、スプリングバックを効果的に軽減できる。   Further, the outer peripheral surface of the end portion on the press-fitting front end side of the cylindrical fitting portion may be positioned radially inward from the outer peripheral surface on the rear end side of the press-fitting. Specifically, the press-fit front end side end portion can have a tapered shape whose outer peripheral surface is reduced in diameter toward the press-fit tip. Thereby, the spring back in the extension coating | cover part which covers the press injection front end side part of a cylindrical fitting part is reduced, and press injection becomes easy. In addition, the tapered surface increases the contact area between the extended covering portion and the relief portion, and increases the frictional resistance generated during the springback, thereby effectively reducing the springback.

以下、図面を参照しつつ本発明の実施の形態について説明する。なお、図1は、本発明のハブユニットの第一実施形態を示す断面図であり、図面中、左側が車両アウタ側、右側が車両インナ側を示す。また、図2は、図1の車両アウタ側摺動シール機構周辺を拡大した拡大断面図であり、図3は、図2の車両アウタ側摺動シール機構の圧入組み付け前の状態を示す断面図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a first embodiment of the hub unit of the present invention. In the drawing, the left side shows the vehicle outer side and the right side shows the vehicle inner side. 2 is an enlarged cross-sectional view in which the periphery of the vehicle outer side sliding seal mechanism of FIG. 1 is enlarged. FIG. 3 is a cross-sectional view of the vehicle outer side slide seal mechanism of FIG. It is.

図1のハブユニット1は、車体側に非回転に取り付けられる外輪(以下、外輪部材ともいう)2と、この外輪2と同心配置されるとともに車輪取付用フランジ33が周方向に形成されたハブホイール3と、該ハブホイール3の少なくとも車両インナ側端部31の外周面に嵌着される内輪4と、該内輪4又はハブホイール3と外輪2との間にて各々周方向に配列する複数の転動体5からなり、かつアキシャル方向に複列に配置された転動体列51,51と、各転動体列51,51の複数の転動体5を周方向に予め定められた配列間隔で保持する保持器52,52とを備える。   A hub unit 1 shown in FIG. 1 is a hub in which an outer ring (hereinafter also referred to as an outer ring member) 2 that is non-rotatably attached to the vehicle body side, a concentric arrangement with the outer ring 2, and a wheel mounting flange 33 formed in the circumferential direction. A plurality of wheels 3, an inner ring 4 fitted to at least an outer peripheral surface of the vehicle inner side end portion 31 of the hub wheel 3, and a plurality arranged in the circumferential direction between the inner ring 4 or the hub wheel 3 and the outer ring 2. Rolling element rows 51 and 51, which are composed of a plurality of rolling elements 5 and arranged in a double row in the axial direction, and a plurality of rolling elements 5 in each of the rolling element rows 51 and 51 are held at predetermined arrangement intervals in the circumferential direction. Holding cages 52, 52.

外輪2は、内周に2列の軌道面を有する筒状の外輪本体部20と、該外輪本体部20の外周面からラジアル方向に突出するハブ取付フランジ23とを有する。外輪2の内周面には、インナ側外輪軌道面2aとアウタ側外輪軌道面2bとが形成されている。また、外輪本体部20のうち、ハブ取付フランジ23よりも車両インナ側に突出する部分が車体への取付部をなす外輪インロー部21とされている。また、ハブ取付フランジ23にはアキシャル方向にボルト挿通孔23aが形成されている。   The outer ring 2 has a cylindrical outer ring main body portion 20 having two rows of raceway surfaces on the inner periphery, and a hub mounting flange 23 protruding in a radial direction from the outer peripheral surface of the outer ring main body portion 20. An inner side outer ring raceway surface 2 a and an outer side outer ring raceway surface 2 b are formed on the inner peripheral surface of the outer ring 2. Further, a portion of the outer ring main body 20 that protrudes further toward the vehicle inner side than the hub mounting flange 23 is an outer ring inlay portion 21 that forms a mounting portion for the vehicle body. The hub mounting flange 23 is formed with a bolt insertion hole 23a in the axial direction.

ハブホイール3は、軸心回りに回転する軸部30と、該軸部30からラジアル方向に突出する環状のハブフランジ33とを有して構成され、外輪2と同心に配置される。軸部30の外周には外輪2が装着され、内部にはアキシャル方向に貫通する軸孔30aが形成されている。軸孔30aには、車軸10が貫通する状態で挿入されている。ハブフランジ33は、車輪のタイヤホイールやブレーキ装置のブレーキディスクロータを固定する車輪取付用フランジとして機能するものであり、タイヤホイール(車輪)とブレーキディスクロータとが取り付けられてこれらと一体回転する。これにより、タイヤホイール(車輪)はハブホイール3及び外輪2を介して車体に対して回転自在に支持されている。ハブホイール3の外周面には車両アウタ側内輪軌道面3bが形成されている。   The hub wheel 3 includes a shaft portion 30 that rotates around the shaft center and an annular hub flange 33 that protrudes in the radial direction from the shaft portion 30, and is disposed concentrically with the outer ring 2. The outer ring 2 is mounted on the outer periphery of the shaft portion 30, and a shaft hole 30a penetrating in the axial direction is formed inside. The axle 10 is inserted through the shaft hole 30a. The hub flange 33 functions as a wheel mounting flange for fixing the tire wheel of the wheel and the brake disc rotor of the brake device, and the tire wheel (wheel) and the brake disc rotor are attached and rotate integrally therewith. Thereby, the tire wheel (wheel) is supported rotatably with respect to the vehicle body via the hub wheel 3 and the outer ring 2. A vehicle outer side inner ring raceway surface 3 b is formed on the outer peripheral surface of the hub wheel 3.

車軸10は、軸方向中途部にスプライン部10aを有し、車両アウタ側にねじ部10bが形成され、ハブ装着部となるスプライン部10aの後方側となる車両インナ側に、スプライン部10aよりも外径が大きい大径部10cが段差をもって形成されている。   The axle 10 has a spline portion 10a in the middle in the axial direction, a screw portion 10b is formed on the vehicle outer side, and is closer to the vehicle inner side, which is the rear side of the spline portion 10a serving as a hub mounting portion, than the spline portion 10a. A large diameter portion 10c having a large outer diameter is formed with a step.

ハブホイール3の車両インナ側端部31の外周面には内輪4が嵌着され、大径部10cの端面に当て止めされている。内輪4の外周面には車両インナ側内輪軌道面4aが形成されている。   The inner ring 4 is fitted on the outer peripheral surface of the vehicle inner side end portion 31 of the hub wheel 3 and is held against the end surface of the large diameter portion 10c. A vehicle inner side inner ring raceway surface 4 a is formed on the outer circumferential surface of the inner ring 4.

ハブホイール3及び内輪4と、外輪2との間には、転動体列51,51が配置される転動体配置空隙500が形成されており、さらに、該転動体配置空隙500の両端部には、図2に示すように、当該空隙500を密封する車両アウタ側の摺動シール機構91と車両インナ側の摺動シール機構92を備える。   Between the hub wheel 3 and the inner ring 4 and the outer ring 2, there are formed rolling element arrangement gaps 500 in which the rolling element rows 51 and 51 are arranged, and at both ends of the rolling element arrangement gaps 500, respectively. As shown in FIG. 2, a sliding seal mechanism 91 on the vehicle outer side and a sliding seal mechanism 92 on the vehicle inner side that seal the gap 500 are provided.

転動体列51は、内輪部材3,4と外輪2との間にて周方向に配列する複数の転動体5からなるものであり、アキシャル方向に複列に配置される。本実施形態における2列の転動体列51,51は、内輪4と外輪2との間に配置される車両インナ側転動体列と、ハブホイール3(軸部30)と外輪2との間に配置される車両アウタ側転動体列とであり、これらがアキシャル方向に隣接して配置されている。   The rolling element row 51 includes a plurality of rolling elements 5 arranged in the circumferential direction between the inner ring members 3 and 4 and the outer ring 2, and is arranged in a double row in the axial direction. Two rolling element rows 51, 51 in this embodiment are arranged between a vehicle inner side rolling element row arranged between the inner ring 4 and the outer ring 2, and between the hub wheel 3 (shaft portion 30) and the outer ring 2. The vehicle outer side rolling element rows are arranged adjacent to each other in the axial direction.

なお、本発明においては、転動体配置空隙500のラジアル方向外側に配置され、内周面に転動体5の軌道面を形成する部材を外輪部材と称する。本実施形態においては外輪2である。また、転動体配置空隙500のラジアル方向内側に配置され、外周面に転動体5の軌道面を形成する部材を内輪部材と称する。本実施形態においてはハブホイール3と内輪4とを合わせたものである。   In the present invention, a member that is arranged on the radially outer side of the rolling element arrangement gap 500 and forms the raceway surface of the rolling element 5 on the inner peripheral surface is referred to as an outer ring member. In the present embodiment, it is the outer ring 2. Further, a member that is disposed radially inside the rolling element arrangement gap 500 and forms the raceway surface of the rolling element 5 on the outer peripheral surface is referred to as an inner ring member. In the present embodiment, the hub wheel 3 and the inner ring 4 are combined.

ところで、車両アウタ側摺動シール機構91は、図2及び図3に示すように、転動体配置空隙500に嵌め込まれており、円環状の金属製のスリンガ(金属スリンガ)201と弾性シール部250とを有して構成されている。   By the way, the vehicle outer side sliding seal mechanism 91 is fitted in the rolling element arrangement space 500 as shown in FIGS. 2 and 3, and is formed with an annular metal slinger (metal slinger) 201 and an elastic seal portion 250. And is configured.

金属スリンガ201は、外輪2の内周面に嵌着する筒状嵌着部201aと、該筒状嵌着部201aの車両アウタ側端縁からラジアル方向内向きに延出する環状のシール支持部201bとからなる。   The metal slinger 201 includes a cylindrical fitting portion 201a that is fitted to the inner peripheral surface of the outer ring 2, and an annular seal support portion that extends radially inward from the vehicle outer side end edge of the cylindrical fitting portion 201a. 201b.

さらに、本実施形態の筒状嵌着部201aにおいては、その先端部をなす車両インナ側端部202aの外周面が車両インナ側に向けて縮径する環状のテーパー面202a1として形成されている。また、本実施形態のシール支持部201bは、筒状嵌着部201aの車両アウタ側端縁からラジアル方向内向きに延出する本体部202bと、その延出した先が車両インナ側に延出し、さらにその先がラジアル方向内向きに延出する形状を有した内側先端部203bとを一体に備えて形成されている。   Furthermore, in the cylindrical fitting part 201a of this embodiment, the outer peripheral surface of the vehicle inner side edge part 202a which makes the front-end | tip part is formed as the cyclic | annular taper surface 202a1 diameter-reduced toward the vehicle inner side. In addition, the seal support portion 201b of the present embodiment includes a main body portion 202b extending radially inward from the vehicle outer side end edge of the cylindrical fitting portion 201a, and an extending tip extending toward the vehicle inner side. Further, the tip portion is integrally provided with an inner tip portion 203b having a shape extending inward in the radial direction.

弾性シール部250は、弾性高分子材料(本実施形態においてはゴム製)からなり、金属スリンガ201に対し回転不能に固着されている。具体的にいえば、弾性シール部250は、金属スリンガ201のシール支持部201bの車両アウタ側主表面に一体化されるとともに内輪部材3,4の外周面3cに摺接するシール部251bとを備え、さらに、シール支持部201bを覆う該シール部251bのラジアル方向外周縁には、筒状嵌着部201aの外周面をアキシャル方向に覆う延長被覆部(アキシャルリップ部)251aが一体形成されている。   The elastic seal portion 250 is made of an elastic polymer material (made of rubber in this embodiment), and is fixed to the metal slinger 201 so as not to rotate. Specifically, the elastic seal portion 250 includes a seal portion 251b that is integrated with the vehicle outer side main surface of the seal support portion 201b of the metal slinger 201 and that is in sliding contact with the outer peripheral surface 3c of the inner ring members 3 and 4. Furthermore, an extension covering portion (axial lip portion) 251a that covers the outer peripheral surface of the cylindrical fitting portion 201a in the axial direction is integrally formed on the outer peripheral edge of the seal portion 251b that covers the seal support portion 201b in the radial direction. .

なお、本実施形態の延長被覆部251aにおいては、その先端部をなす車両インナ側端部252aが筒状嵌着部201aのテーパー面202a1の先端位置まで密着して形成されている。また、延長被覆部251aと筒状嵌着部201aとが密着してなる外周側圧入部200は、筒状感着部先端にテーパー面202a1を形成しつつも、その先端からラジアル方向内向きに延出を開始する部分までが一定の厚みを有して形成されており、延長被覆部251aは、該テーパー面202a1との密着部分252aにおいて他の領域よりも厚く形成され、弾性変形代を大きく有している。   Note that, in the extension covering portion 251a of the present embodiment, the vehicle inner side end portion 252a forming the tip portion thereof is formed in close contact with the tip end position of the tapered surface 202a1 of the cylindrical fitting portion 201a. In addition, the outer peripheral side press-fitting portion 200 formed by closely attaching the extension covering portion 251a and the cylindrical fitting portion 201a extends inward in the radial direction from the tip while forming a tapered surface 202a1 at the tip of the cylindrical sensing portion. The extension covering portion 251a is formed to be thicker than the other regions in the close contact portion 252a with the tapered surface 202a1, and has a large elastic deformation allowance. is doing.

他方、本実施形態のシール部251bは、延長被覆部251aの車両アウタ側端縁からラジアル方向内向きに延出し、シール支持部201b(本体部202b及び内側先端部203b)の車両アウタ側の面に密着するシール基部252bを備え、さらに、該シール基部252bのラジアル方向内側の先端から該内側先端部203bの車両インナ側の面も被うように折り返し、内側先端部203bの車両アウタ側の面を被う形で該車両インナ側の面と密着する折り返し密着部252eを備えている。この折り返し密着部252eが設けられていることで、金属スリンガ201との密着がより強固なものとなっている。   On the other hand, the seal portion 251b of the present embodiment extends radially inward from the vehicle outer side end edge of the extension covering portion 251a, and the vehicle outer side surface of the seal support portion 201b (the main body portion 202b and the inner front end portion 203b). A seal base portion 252b that is in close contact with the inner base portion 252b. Further, the inner end portion 203b is folded back so as to cover the vehicle inner side surface of the inner base end portion 203b from the radial inner end of the seal base portion 252b. Is provided with a folded contact portion 252e that is in close contact with the surface on the vehicle inner side. By providing the folded contact portion 252e, the contact with the metal slinger 201 becomes stronger.

さらに、本実施形態のシール部251bは、シール基部252bから内輪部材3,4の外周面3cに向けて突出する環状突出部252d、252cを備えている。環状突出部252cは、内輪部材をなすハブホイール3の外周面3cに向けて延出する形で形成され、その先端部が該外周面3cに摺接する第一リップ部(252c)とされている。本実施形態の環状突出部252cは、アキシャル方向に2つ並んで形成され、一方が車両インナ側に向けて延出し、他方が車両アウタ側に向けて延出する形状を有する。他方、環状突出部252dは、内輪部材をなすハブホイール3のハブフランジ33の基端部における車両インナ側周側面33aに向けて延出する形で形成され、その先端部が該車両インナ側周側面33aに摺接する第二リップ部(252d)とされている。   Furthermore, the seal portion 251b of the present embodiment includes annular projecting portions 252d and 252c that project from the seal base portion 252b toward the outer peripheral surface 3c of the inner ring members 3 and 4. The annular projecting portion 252c is formed so as to extend toward the outer peripheral surface 3c of the hub wheel 3 constituting the inner ring member, and the tip portion thereof is a first lip portion (252c) that is in sliding contact with the outer peripheral surface 3c. . The two annular protrusions 252c of the present embodiment are formed side by side in the axial direction, and have a shape in which one extends toward the vehicle inner side and the other extends toward the vehicle outer side. On the other hand, the annular projecting portion 252d is formed to extend toward the vehicle inner side circumferential side surface 33a at the proximal end portion of the hub flange 33 of the hub wheel 3 that forms the inner ring member, and the distal end portion thereof is formed on the vehicle inner side circumferential side. The second lip portion (252d) is in sliding contact with the side surface 33a.

次に、車両アウタ側摺動シール機構91の組み付けについて説明する。組み付けは、車両アウタ側摺動シール機構91をアキシャル方向に押し込み、その外周側圧入部200を外輪2の内側に圧入させる形でなされる。つまり、金属スリンガ201の筒状嵌着部201aを、延長被覆部251aにより外周面が覆われた状態で、外輪2の内周側にアキシャル方向に圧入させる。これにより、外輪部材(外輪)2に対し延長被覆部251aがラジアル方向に圧縮される形で密着し、内輪部材3,4にも弾性シール部250の環状突出部252d、252cが摺接して、内輪部材3,4と外輪部材2との間の隙間がシールされた状態となる。   Next, assembly of the vehicle outer side sliding seal mechanism 91 will be described. The assembly is performed in such a manner that the vehicle outer side sliding seal mechanism 91 is pushed in the axial direction and the outer peripheral side press-fitting portion 200 is press-fitted inside the outer ring 2. That is, the cylindrical fitting portion 201a of the metal slinger 201 is press-fitted in the axial direction on the inner peripheral side of the outer ring 2 in a state where the outer peripheral surface is covered with the extension covering portion 251a. Thereby, the extension covering portion 251a is in close contact with the outer ring member (outer ring) 2 in a radially compressed manner, and the annular protrusions 252d and 252c of the elastic seal portion 250 are also slidably contacted with the inner ring members 3 and 4, The gap between the inner ring members 3 and 4 and the outer ring member 2 is sealed.

ところが、アキシャル方向に押し込む力が作用している間は、車両アウタ側摺動シール機構91は、外輪部材(外輪)2に対する規定位置に到達しているが、このとき、弾性体からなる延長被覆部251aは、ラジアル方向ではなく圧入方向へも弾性変形しているため、押し込むのを止めると同時に弾性復帰して該規定位置からアキシャル方向にずれる、即ち、アキシャル方向にスプリングバックが生じる。   However, while the force pushing in the axial direction is acting, the vehicle outer side sliding seal mechanism 91 reaches the specified position with respect to the outer ring member (outer ring) 2, but at this time, the extended covering made of an elastic body is used. Since the portion 251a is elastically deformed not only in the radial direction but also in the press-fitting direction, it is elastically restored at the same time as the pushing-in is stopped and deviates from the defined position in the axial direction, that is, a spring back is generated in the axial direction.

これを防止するために、本発明においては、車両アウタ側摺動シール機構91の外周側圧入部200に、圧入される該延長被覆部251aの一部を弾性復帰させつつ迎え入れる逃がし部100が形成されている。これにより、圧入される延長被覆部251a(アキシャルリップ部)は、その一部が逃がし部100に膨出し、この膨出により圧入方向への圧縮変形が緩和され、上記のようなスプリングバックを軽減することが可能となる。   In order to prevent this, in the present invention, an escape portion 100 is formed in the outer peripheral side press-fit portion 200 of the vehicle outer side sliding seal mechanism 91 to receive a part of the press-fit extension covering portion 251a while elastically returning a part thereof. ing. As a result, a part of the extended covering portion 251a (axial lip portion) to be press-fitted bulges into the relief portion 100, and this bulge alleviates compressive deformation in the press-fitting direction, thus reducing the above-described spring back. It becomes possible to do.

本実施形態においては、筒状嵌着部201aにラジアル方向に貫通する貫通部201Aが形成されており、この貫通部201Aが逃がし部(逃がし部)100として機能する。図2の符号250Aは、逃がし部100内に膨出した延長被覆部251aの一部である。なお、本実施形態の貫通部201Aは貫通孔であり、筒状嵌着部201aにおいて、アキシャル方向両端部を除く、それらアキシャル方向両端部の間の位置に形成されている。さらに言えば、アキシャル方向両端部の間の、車両インナ側に偏った位置に設けられている。   In the present embodiment, a penetrating portion 201A that penetrates in the radial direction is formed in the tubular fitting portion 201a, and the penetrating portion 201A functions as a relief portion (a relief portion) 100. Reference numeral 250 </ b> A in FIG. 2 is a part of the extended covering portion 251 a that bulges into the escape portion 100. In addition, penetration part 201A of this embodiment is a through-hole, and is formed in the position between these axial direction both ends except the axial direction both ends in cylindrical fitting part 201a. More specifically, it is provided at a position that is biased toward the vehicle inner side between both ends in the axial direction.

なお、本実施形態における弾性シール部250は、シール機能部として使用されない部分も含めた全体が同一の弾性高分子材料にて一体形成されていることで、シール機構の製造を容易化している。ただし、シール機能部以外を、金属スリンガとの密着を強化できる別材料にて形成し、シール機能部のみを弾性変形能を有した弾性高分子材料にて形成してもよい。また、弾性高分子材料はゴムに限られず、本実施形態と同様ないしはそれ以上のシール性能及び摺動抵抗を満足するものであれば、適用可能である。   It should be noted that the elastic seal portion 250 in this embodiment, including the portion that is not used as the seal function portion, is integrally formed of the same elastic polymer material, thereby facilitating the manufacture of the seal mechanism. However, the part other than the sealing function part may be formed of another material that can reinforce the adhesion with the metal slinger, and only the sealing function part may be formed of an elastic polymer material having elastic deformability. Further, the elastic polymer material is not limited to rubber, and can be applied as long as it satisfies the sealing performance and sliding resistance similar to or higher than those of the present embodiment.

以上、本発明の第一実施形態を説明したが、これらはあくまで例示にすぎず、本発明はこれらに限定されるものではなく、特許請求の範囲の趣旨を逸脱しない限りにおいて種々の変更が可能である。   As mentioned above, although 1st embodiment of this invention was described, these are only illustrations, this invention is not limited to these, A various change is possible unless it deviates from the meaning of a claim. It is.

以下、上記第一実施形態とは異なる他の実施形態について説明する。なお、第一実施形態と同様の部分については同符号を付することにより説明を省略する。   Hereinafter, other embodiments different from the first embodiment will be described. In addition, about the part similar to 1st embodiment, description is abbreviate | omitted by attaching | subjecting the same code | symbol.

図4は、本発明の第二実施形態の車両アウタ側摺動シール機構91を示す断面図である。図5は、本発明の第三実施形態の車両アウタ側摺動シール機構91を示す断面図である。図6は、本発明の第四実施形態の車両アウタ側摺動シール機構91を示す断面図である。これらの実施形態においては、弾性シール部250の延長被覆部251aにも逃がし部100を形成している。   FIG. 4 is a cross-sectional view showing the vehicle outer side sliding seal mechanism 91 according to the second embodiment of the present invention. FIG. 5 is a cross-sectional view showing a vehicle outer side sliding seal mechanism 91 according to the third embodiment of the present invention. FIG. 6 is a cross-sectional view showing a vehicle outer side sliding seal mechanism 91 according to a fourth embodiment of the present invention. In these embodiments, the relief portion 100 is also formed in the extended covering portion 251 a of the elastic seal portion 250.

図4の実施形態においては、弾性シール部250の延長被覆部251aの外周面に凹部251Aが形成されており、金属スリンガ201の筒状嵌着部201aの貫通部201Aとともに、圧入される該延長被覆部251aの一部を弾性復帰させつつ迎え入れる逃がし部(逃がし凹部)100として機能する。なお、この凹部251A(100)は、延長被覆部251aの周方向に連続形成される溝部として形成してもよいし、延長被覆部251aの周方向に複数形成されていてもよい。この構成は、延長被覆部251aの圧縮変形量が多い場合に好適である。本実施形態においては、この凹部251Aと貫通孔201Aとにバランスよく延長被覆部251aが膨出するよう、凹部251Aが貫通孔201Aに対応する位置(互いがラジアル方向に対向するように)に形成されている。   In the embodiment of FIG. 4, a recess 251 </ b> A is formed on the outer peripheral surface of the extension covering portion 251 a of the elastic seal portion 250, and the extension that is press-fitted together with the penetration portion 201 </ b> A of the cylindrical fitting portion 201 a of the metal slinger 201. It functions as an escape part (escape recess) 100 that welcomes a part of the covering part 251a while elastically returning a part thereof. In addition, this recessed part 251A (100) may be formed as a groove part continuously formed in the circumferential direction of the extended covering part 251a, or a plurality of recessed parts may be formed in the circumferential direction of the extended covering part 251a. This configuration is suitable when the amount of compressive deformation of the extended covering portion 251a is large. In the present embodiment, the recessed portion 251A is formed at a position corresponding to the through hole 201A (so that they are opposed to each other in the radial direction) so that the extended covering portion 251a bulges in a balanced manner in the recessed portion 251A and the through hole 201A. Has been.

図5の実施形態においては、弾性シール部250の延長被覆部251aの外周面に凸部251Bが形成されている。そして、この凸部251Bに隣接し、かつこの凸部251Bの基部251Cの外周側空間が、金属スリンガ201の筒状嵌着部201aの貫通部201Aとともに、圧入される該延長被覆部251aの一部を弾性復帰させつつ迎え入れる逃がし部100として機能する。なお、この凸部251Bは、延長被覆部251aの周方向に連続形成されるリブのように形成してもよいし、延長被覆部251aの周方向に複数形成されていてもよい。この構成は、この凸部251Bにおいて外輪部材2と延長被覆部251aとの密着力を強化できる利点がある。また、本実施形態においては、圧縮組み付け時に、この凸部251Bに生ずる圧縮方向への圧縮変形が緩和されやすいように、凸部251Bが貫通孔201Aに対応する位置(互いがラジアル方向に対向するように)に形成されている。   In the embodiment of FIG. 5, a convex portion 251 </ b> B is formed on the outer peripheral surface of the extension covering portion 251 a of the elastic seal portion 250. One of the extended covering portions 251a that is press-fitted into the outer peripheral space of the base portion 251C of the convex portion 251B together with the through-hole portion 201A of the cylindrical fitting portion 201a of the metal slinger 201 is adjacent to the convex portion 251B. It functions as a relief part 100 that welcomes the part while elastically returning the part. In addition, this convex part 251B may be formed like the rib continuously formed in the circumferential direction of the extension coating | cover part 251a, and multiple may be formed in the circumferential direction of the extension coating | coated part 251a. This configuration has an advantage that the adhesion between the outer ring member 2 and the extended covering portion 251a can be enhanced at the convex portion 251B. Further, in the present embodiment, at the time of compression assembly, the protrusions 251B are located at positions corresponding to the through holes 201A (they face each other in the radial direction so that the compressive deformation in the compression direction that occurs in the protrusions 251B is easily relieved. So that it is formed).

図6の実施形態においては、弾性シール部250の延長被覆部251aの外周面に凸部251Dと凹部251Eが隣接形成されている。そして、この凹部251Eが、金属スリンガ201の筒状嵌着部201aの貫通部201Aとともに、圧入される該延長被覆部251aの一部を弾性復帰させつつ迎え入れる逃がし部(逃がし凹部)100として機能する。さらに言えば、凸部251Dに隣接し、かつ該凸部251Dの基部(凹部251Eも含む)の外周側空間も逃がし部として機能する。なお、この凸部251D及び凹部251Eは、延長被覆部251aの周方向に隣接形成されてもよいし、延長被覆部251aのアキシャル方向に隣接形成されてもよい。周方向に隣接形成される場合は、凸部251Dと凹部251Eとが交互に繰り返し隣接する環状凹凸部として形成することができるし、アキシャル方向に隣接形成される場合は、凸部251D及び凹部251Eを周方向に連続する凸条部や溝のようにして形成することができる。また、この周方向に連続する凸部251Dと凹部251Eとがアキシャル方向に繰り返し隣接するように形成してもよい。本実施形態においては、アキシャル方向に隣接形成されており、圧縮組み付け時にこの凸部251Dに生ずる圧縮方向への圧縮変形が緩和されやすいよう、凸部251Dが組み付け方向奥側に位置し、凹部251Eが組み付け方向手前側に位置するよう形成されている。そして、さらに、隣接する凸部251Dと凹部251Eが貫通孔201Aに対応する位置(互いがラジアル方向に対向するように)に形成されている。   In the embodiment of FIG. 6, a convex portion 251 </ b> D and a concave portion 251 </ b> E are formed adjacent to each other on the outer peripheral surface of the extended covering portion 251 a of the elastic seal portion 250. And this recessed part 251E functions as the escape part (relief recessed part) 100 which welcomes it while elastically returning a part of this extended coating | coated part 251a with the penetration part 201A of the cylindrical fitting part 201a of the metal slinger 201. . More specifically, the outer peripheral space adjacent to the convex portion 251D and the base portion (including the concave portion 251E) of the convex portion 251D also functions as a relief portion. Note that the convex portions 251D and the concave portions 251E may be formed adjacent to each other in the circumferential direction of the extension covering portion 251a, or may be formed adjacent to each other in the axial direction of the extension covering portion 251a. When adjacently formed in the circumferential direction, the convex portions 251D and the concave portions 251E can be alternately formed as annular concave and convex portions, and when formed adjacent in the axial direction, the convex portions 251D and the concave portions 251E are formed. Can be formed like a ridge or groove continuous in the circumferential direction. Moreover, you may form so that the convex part 251D and recessed part 251E which continue in this circumferential direction may adjoin repeatedly in an axial direction. In the present embodiment, the projections 251D are formed adjacent to each other in the axial direction, and the projections 251D are located on the back side in the assembly direction so that the compression deformation in the compression direction generated in the projections 251D during compression assembly is easily relieved. Is formed so as to be located on the front side in the assembling direction. Further, adjacent convex portions 251D and concave portions 251E are formed at positions corresponding to the through holes 201A (so that they face each other in the radial direction).

図7は、図1の車両アウタ側摺動シール機構周辺を拡大した拡大断面図であり、車両アウタ側摺動シール機構が上記した全ての実施形態とは異なる。その違いは、金属スリンガ201の筒状嵌着部201aに貫通部201Aが形成されていない点にある。このような形態を有する車両アウタ側摺動シール機構としては、例えば、図8、図9、図10に示すような車両アウタ側摺動シール機構91を例示できる。なお、図8、図9、図10は、本発明の第五、第六、第七実施形態の車両アウタ側摺動シール機構91を示す断面図である。それら各実施形態は、図4、図5、図6の実施形態において、金属スリンガ201の筒状嵌着部201aに貫通部201Aが形成されていない形態を有しており、延長被覆部251aに形成された凹部251A、基部251C、凹部251Eのみが逃がし部100として機能している。   FIG. 7 is an enlarged cross-sectional view in which the periphery of the vehicle outer side sliding seal mechanism of FIG. 1 is enlarged, and the vehicle outer side sliding seal mechanism is different from all the embodiments described above. The difference is that the through-hole 201A is not formed in the cylindrical fitting portion 201a of the metal slinger 201. As a vehicle outer side sliding seal mechanism having such a configuration, for example, a vehicle outer side sliding seal mechanism 91 as shown in FIGS. 8, 9, and 10 can be exemplified. 8, 9, and 10 are cross-sectional views showing the vehicle outer side sliding seal mechanism 91 according to the fifth, sixth, and seventh embodiments of the present invention. Each of these embodiments has a form in which the penetration part 201A is not formed in the cylindrical fitting part 201a of the metal slinger 201 in the embodiments of FIGS. 4, 5, and 6, and the extension covering part 251a has Only the formed concave portion 251A, base portion 251C, and concave portion 251E function as the relief portion 100.

ところで、本発明における車両アウタ側摺動シール機構91は、金属スリンガ201に、外輪部材2とラジアル方向に対向する形でアキシャル方向に延出する筒状嵌着部201aが形成され、弾性シール部250に、当該筒状嵌着部201aの外周面に密着して、圧入組み付け時に外輪部材2によりラジアル方向外側からの圧縮を受ける延長被覆部251aが形成されている構成を有しているが、金属スリンガ201のシール支持部201bや弾性シール部250のシール部251bの形状については、上記実施形態とは異なる形状であってもよい。   By the way, in the vehicle outer side sliding seal mechanism 91 in the present invention, a cylindrical fitting portion 201a extending in the axial direction is formed on the metal slinger 201 so as to face the outer ring member 2 in the radial direction, and the elastic seal portion. 250 has a configuration in which an extension covering portion 251a that is in close contact with the outer peripheral surface of the cylindrical fitting portion 201a and receives compression from the outer side in the radial direction by the outer ring member 2 during press-fit assembly is formed. The shapes of the seal support portion 201b of the metal slinger 201 and the seal portion 251b of the elastic seal portion 250 may be different from those in the above embodiment.

例えば、弾性シール部の延長被覆部251aの形状を、図11に示すような形状にすることができる。つまり、延長被覆部251aの先端部(車両インナ側端部)を、筒状嵌着部201aの先端面(車両インナ側端面)に密着するようラジアル方向内向きに延出させた形状(符号251F)とすることができる。これにより、金属スリンガ201と弾性シール部250の密着力が強化されている。なお、密着力をさらに強化するために、延長被覆部251aの先端部(車両インナ側端部)が、筒状嵌着部201aの先端面(車両インナ側端面)に密着し、さらに筒状嵌着部201aの内周面側にも回りこんで当該内周面にも密着するように形成されていてもよい。なお、この構成は、上記した全ての実施形態において適用することができる。   For example, the shape of the extended covering portion 251a of the elastic seal portion can be made as shown in FIG. That is, a shape (reference numeral 251F) in which the distal end portion (vehicle inner side end portion) of the extension covering portion 251a extends radially inward so as to be in close contact with the distal end surface (vehicle inner side end surface) of the cylindrical fitting portion 201a. ). Thereby, the contact | adhesion power of the metal slinger 201 and the elastic seal part 250 is strengthened. In order to further strengthen the adhesion, the distal end portion (vehicle inner side end portion) of the extension covering portion 251a is in close contact with the distal end surface (vehicle inner side end surface) of the cylindrical fitting portion 201a, and further the cylindrical fitting is performed. It may be formed so as to go around the inner peripheral surface side of the wearing portion 201a and to be in close contact with the inner peripheral surface. This configuration can be applied to all the embodiments described above.

また、金属スリンガ201のシール支持部201bの形状を、図12に示すように形成することができる。つまり、シール支持部201bの本体部202bの筒状嵌着部201a側部分203を、該筒状嵌着部201aの車両アウタ側端縁からラジアル方向内向きに延出し、その先が再び車両アウタ側に延出して、その先が再びラジアル方向内向きに延出する形状とすることができる。この構成によると、本体部202bの筒状嵌着部201a側部分203には、筒状嵌着部201aに対し段差を設けた形状となる。そして、この部分(段部)203に密着される弾性シール部250は、車両アウタ側摺動シール機構91の圧入組み付け時に外輪部材2と密着する厚みを有しており、筒状嵌着部201aに密着する弾性シール部250(延長被覆部251a)よりも厚く形成されている。さらに言えば、筒状嵌着部201aに密着する弾性シール部250(延長被覆部251a)よりもラジアル方向外向きに突出する突出弾性部253bが形成されており、外輪部材2の密着をより強固なものとしている。なお、この構成は、上記した全ての実施形態において適用することができる。   Further, the shape of the seal support portion 201b of the metal slinger 201 can be formed as shown in FIG. That is, the cylindrical fitting portion 201a side portion 203 of the main body portion 202b of the seal support portion 201b extends inward in the radial direction from the vehicle outer side edge of the cylindrical fitting portion 201a, and the tip thereof again extends to the vehicle outer side. It can be made the shape which extends to the side and the tip extends inward in the radial direction again. According to this structure, the cylindrical fitting part 201a side part 203 of the main-body part 202b becomes a shape which provided the level | step difference with respect to the cylindrical fitting part 201a. The elastic seal portion 250 that is in close contact with the portion (step portion) 203 has a thickness that is in close contact with the outer ring member 2 when the vehicle outer side sliding seal mechanism 91 is press-fitted and assembled, and the cylindrical fitting portion 201a. It is formed to be thicker than the elastic seal portion 250 (extension covering portion 251a) that is in close contact therewith. More specifically, a protruding elastic portion 253b that protrudes outward in the radial direction from the elastic seal portion 250 (extension covering portion 251a) that is in close contact with the cylindrical fitting portion 201a is formed, and the outer ring member 2 is more firmly attached. It is supposed to be. This configuration can be applied to all the embodiments described above.

本発明のハブユニットの一実施形態を示す断面図。Sectional drawing which shows one Embodiment of the hub unit of this invention. 図1のシール機構を拡大した第一の拡大断面図。The 1st expanded sectional view which expanded the seal mechanism of FIG. 本発明の第一実施形態のシール機構を示す拡大断面図。The expanded sectional view which shows the seal mechanism of 1st embodiment of this invention. 本発明の第二実施形態のシール機構を示す拡大断面図。The expanded sectional view which shows the seal mechanism of 2nd embodiment of this invention. 本発明の第三実施形態のシール機構を示す拡大断面図。The expanded sectional view which shows the seal mechanism of 3rd embodiment of this invention. 本発明の第四実施形態のシール機構を示す拡大断面図。The expanded sectional view which shows the seal mechanism of 4th embodiment of this invention. 図1のシール機構を拡大した第二の拡大断面図。The 2nd expanded sectional view which expanded the seal mechanism of FIG. 本発明の第五実施形態のシール機構を示す拡大断面図。The expanded sectional view which shows the seal mechanism of 5th embodiment of this invention. 本発明の第六実施形態のシール機構を示す拡大断面図。The expanded sectional view which shows the seal mechanism of 6th embodiment of this invention. 本発明の第七実施形態のシール機構を示す拡大断面図。The expanded sectional view which shows the seal mechanism of 7th embodiment of this invention. 各実施形態に適用可能な構造を示す拡大断面図。The expanded sectional view which shows the structure applicable to each embodiment. 各実施形態に適用可能な、図11とは異なる構造を示す拡大断面図。The expanded sectional view which shows the structure different from FIG. 11 applicable to each embodiment.

符号の説明Explanation of symbols

1 ハブユニット
2 外輪(外輪部材)
3 ハブホイール(内輪部材)
4 内輪(内輪部材)
5 転動体
51 転動体列
91 車両アウタ側摺動シール機構
201 金属スリンガ
201a 筒状嵌着部
201b シール支持部
250 弾性シール部
251a 延長被覆部
100 逃がし部
1 Hub unit 2 Outer ring (outer ring member)
3 Hub wheel (inner ring member)
4 Inner ring (inner ring member)
DESCRIPTION OF SYMBOLS 5 Rolling body 51 Rolling body row | line | column 91 Vehicle outer side sliding seal mechanism 201 Metal slinger 201a Cylindrical fitting part 201b Seal support part 250 Elastic seal part 251a Extension coating | cover part 100 Escape part

Claims (2)

車両用ハブユニットにおいて、外輪部材と内輪部材との間に形成される転動体配置空間の車両アウタ側を封止する車両アウタ側摺動シール機構が、前記外輪部材の内周面に嵌合する筒状嵌着部と該筒状嵌着部の車両アウタ側端縁からラジアル方向内向きに延出する環状のシール支持部とを有した金属スリンガと、該金属スリンガの前記シール支持部の車両アウタ側主表面に一体化されるとともに、前記内輪部材の外周面に摺接する弾性高分子材料からなるシール部とを備え、さらに、
前記シール支持部を覆う該シール部のラジアル方向外周縁には、前記筒状嵌着部の外周面をアキシャル方向に覆う延長被覆部が前記弾性高分子材料により一体形成され、前記金属スリンガの前記筒状嵌着部が当該延長被覆部により覆われた状態で前記外輪部材の内周面に圧入されるとともに、前記筒状嵌着部と前記延長被覆部とを有してなる前記車両アウタ側摺動シール機構の外周側圧入部には、圧入される該延長被覆部の一部を弾性復帰させつつ迎え入れる逃がし部が形成され、
前記逃がし部は、前記筒状嵌着部をラジアル方向に貫通する貫通孔であり、
前記延長被覆部は、前記貫通孔内に非膨出の形で該貫通孔を被っており、
前記貫通孔内に非膨出の前記延長被覆部が、前記外輪部材の内周面への圧入されることにより該延長被覆部の一部が弾性復帰する形で、該貫通孔内へと膨出していることを特徴とする車両用ハブユニット。
In the vehicle hub unit, a vehicle outer side sliding seal mechanism that seals the vehicle outer side of the rolling element arrangement space formed between the outer ring member and the inner ring member is fitted to the inner peripheral surface of the outer ring member. A metal slinger having a cylindrical fitting portion and an annular seal support portion extending inward in the radial direction from a vehicle outer side edge of the cylindrical fitting portion, and the vehicle of the seal support portion of the metal slinger A seal portion made of an elastic polymer material that is integrated with the outer main surface and is in sliding contact with the outer peripheral surface of the inner ring member;
An extension covering portion that covers the outer peripheral surface of the cylindrical fitting portion in the axial direction is integrally formed of the elastic polymer material on the outer peripheral edge in the radial direction of the seal portion that covers the seal support portion, and the metal slinger The vehicle outer side, which is press-fitted into the inner peripheral surface of the outer ring member in a state in which the cylindrical fitting portion is covered with the extension covering portion, and has the cylindrical fitting portion and the extension covering portion In the outer periphery side press-fitting part of the sliding seal mechanism, a relief part is formed that welcomes the part of the extended covering part that is press-fitted while elastically returning,
The escape portion is a through hole that penetrates the cylindrical fitting portion in a radial direction,
The extension covering portion covers the through hole in a non-bulged form in the through hole,
The extension covering part that does not bulge into the through hole is pressed into the inner peripheral surface of the outer ring member so that a part of the extension covering part is elastically restored, and is expanded into the through hole. A hub unit for a vehicle characterized in that it is out .
前記逃がし部は、前記筒状嵌着部の周方向に複数有しており、該貫通孔のラジアル方向外側開口が前記延長被覆部にて被われている請求項1記載の車両用ハブユニット。   2. The vehicle hub unit according to claim 1, wherein a plurality of the relief portions are provided in a circumferential direction of the cylindrical fitting portion, and a radially outward opening of the through hole is covered with the extension covering portion.
JP2007304869A 2007-11-26 2007-11-26 Hub unit for vehicles Expired - Fee Related JP5046185B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103925297A (en) * 2013-01-16 2014-07-16 株式会社捷太格特 Rolling bearing device and rolling mill supporting roll using the same
US20160010692A1 (en) * 2014-07-08 2016-01-14 Jtekt Corporation Seal and cover
EP3988806A4 (en) * 2019-06-19 2022-08-03 NTN Corporation Bearing device for wheel

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JPS6084863U (en) * 1983-11-17 1985-06-11 エヌオーケー株式会社 oil seal
JPS6093070U (en) * 1983-12-01 1985-06-25 エヌオーケー株式会社 sealing device
JP2557649Y2 (en) * 1993-12-29 1997-12-10 株式会社早川製作所 Oil seal
JPH08193661A (en) * 1995-01-13 1996-07-30 Jatco Corp Oil seal device and discharge valve
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JP4610772B2 (en) * 2001-04-10 2011-01-12 キーパー株式会社 Sealing device
JP2007024205A (en) * 2005-07-19 2007-02-01 Nok Corp Oil seal

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103925297A (en) * 2013-01-16 2014-07-16 株式会社捷太格特 Rolling bearing device and rolling mill supporting roll using the same
CN103925297B (en) * 2013-01-16 2018-10-26 株式会社捷太格特 Rolling bearing system and roller mill backing roll using the rolling bearing system
US20160010692A1 (en) * 2014-07-08 2016-01-14 Jtekt Corporation Seal and cover
EP3988806A4 (en) * 2019-06-19 2022-08-03 NTN Corporation Bearing device for wheel

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