JP2011088513A - Bearing seal for wheels and bearing device for wheels equipped with the same - Google Patents

Bearing seal for wheels and bearing device for wheels equipped with the same Download PDF

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Publication number
JP2011088513A
JP2011088513A JP2009242264A JP2009242264A JP2011088513A JP 2011088513 A JP2011088513 A JP 2011088513A JP 2009242264 A JP2009242264 A JP 2009242264A JP 2009242264 A JP2009242264 A JP 2009242264A JP 2011088513 A JP2011088513 A JP 2011088513A
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Japan
Prior art keywords
seal
lip
diameter
wheel
bearing device
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JP2009242264A
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Japanese (ja)
Inventor
Shogo Suzuki
昭吾 鈴木
Shigeaki Fukushima
茂明 福島
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2009242264A priority Critical patent/JP2011088513A/en
Publication of JP2011088513A publication Critical patent/JP2011088513A/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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7873—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section
    • F16C33/7876—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section with sealing lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • 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
    • F16C19/185—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 two raceways provided integrally on a part other than a race ring, e.g. a shaft or housing
    • 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)
  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing seal for wheels and a bearing device for wheels equipped with the same for improving resistance against muddy water. <P>SOLUTION: The seal 8 includes: a fitting part 10a pressed in the inner periphery at the end of an outward member 5; and a cored bar 10 having an inside diameter part 10b extending inwardly in a radial direction from the fitting part; a pair of side lips 11a, 11b which are bonded to the inside diameter part 10b, and extend on a slant outwardly in the radial direction; and a seal member 11 which integrally has a dust lip 11c extending on a slant outwardly in the radial direction at the inside diameter side, and a grease lip 11d extending on a slant at an inner side of the bearing device. The side lips 11a, 11b are brought into sliding contact with a side surface 6c at an inner side of a wheel mounting flange 6 through a predetermined axial contact margin. A base part 6b at the inner side of the wheel mounting flange 6 is formed on a curved surface with a cross-section circular shape. The dust lip 11c and the grease lip 11d are brought into sliding contact with the base part 6b through the predetermined axial contact margin and the predetermined radial contact margin, respectively. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、車輪用軸受シールに関し、詳しくは、耐泥水性の向上を図った車輪用軸受シールおよびそれを備えた車輪用軸受装置に関するものである。   The present invention relates to a wheel bearing seal, and more particularly to a wheel bearing seal with improved muddy water resistance and a wheel bearing device including the same.

従来から自動車等の車輪を支持する車輪用軸受装置は、車輪を取り付けるためのハブ輪を複列の転がり軸受を介して回転自在に支承するもので、駆動輪用と従動輪用とがある。構造上の理由から、駆動輪用では内輪回転方式が、従動輪用では内輪回転と外輪回転の両方式が一般的に採用されている。また、車輪用軸受装置には、懸架装置を構成するナックルとハブ輪との間に複列アンギュラ玉軸受等からなる車輪用軸受を嵌合させた第１世代と称される構造から、外方部材の外周に直接車体取付フランジまたは車輪取付フランジが形成された第２世代構造、また、ハブ輪の外周に一方の内側転走面が直接形成された第３世代構造、あるいは、ハブ輪と等速自在継手の外側継手部材の外周にそれぞれ内側転走面が直接形成された第４世代構造とに大別されている。   2. Description of the Related Art Conventionally, a wheel bearing device for supporting a wheel of an automobile or the like supports a hub wheel for mounting a wheel rotatably via a double row rolling bearing, and includes a drive wheel and a driven wheel. For structural reasons, an inner ring rotation method is generally used for driving wheels, and an inner ring rotation method and an outer ring rotation method are generally used for driven wheels. Further, the wheel bearing device has a structure called a first generation in which a wheel bearing composed of a double row angular ball bearing or the like is fitted between a knuckle and a hub wheel constituting a suspension device. Second generation structure in which body mounting flange or wheel mounting flange is formed directly on the outer periphery of the member, third generation structure in which one inner rolling surface is directly formed on the outer periphery of the hub wheel, or hub wheel, etc. It is roughly classified into a fourth generation structure in which the inner rolling surface is directly formed on the outer periphery of the outer joint member of the speed universal joint.

これらの車輪用軸受装置は泥水等がかかり易い部位に配置されるため、密封装置が装着されて外方部材と内方部材との間を密封するように構成されている。近年、自動車のメンテナンスフリー化が進み、車輪用軸受装置においてもさらなる長寿命化が要求されるようになっているが、市場回収品の軸受損傷状況を検証すると、剥離等の本来の軸受寿命よりも、シール不具合あるいは密封性の低下により軸受内に雨水やダスト等が侵入して軸受が損傷する事例が少なくない。したがって、シールの密封性を向上させることにより、軸受寿命の向上を図ることができる。   Since these wheel bearing devices are disposed at sites where muddy water or the like is easily applied, a sealing device is attached so as to seal between the outer member and the inner member. In recent years, the maintenance of automobiles has become more maintenance-free, and even longer bearing life has been demanded for wheel bearing devices. However, there are many cases in which rainwater, dust, or the like intrudes into the bearing and damages the bearing due to a sealing failure or a decrease in sealing performance. Therefore, it is possible to improve the bearing life by improving the sealing performance of the seal.

従来から、密封性を向上させたシール構造に関しては種々提案されているが、こうしたシール構造の一例を図１２に示す。このシール５０は、外輪５１の内周面とハブ輪５２との間の内部空間５３の外端開口部を塞ぎ、外径側、内径側、２本のサイドリップ５４、５５と、１本のラジアルリップ５６とが形成されている。このうち、外径側のサイドリップ５４の先端縁は、ハブ輪５２の車輪取付フランジ５７の側面で、この側面と外周面とを連続させる曲面部５８よりも径方向外方に摺接され、また、内径側のサイドリップ５５の先端縁は、曲面部５８に摺接されている。この内径側のサイドリップ５５の厚さは、外径側のサイドリップ５４の厚さよりも小さい。したがって、内径側のサイドリップ５５の剛性は外径側のサイドリップ５４の剛性よりも低く、当接圧も低くなっている。これにより、回転トルクの低減を図ることができる。   Conventionally, various seal structures with improved sealing performance have been proposed. An example of such a seal structure is shown in FIG. The seal 50 closes the outer end opening of the inner space 53 between the inner peripheral surface of the outer ring 51 and the hub ring 52, and has an outer diameter side, an inner diameter side, two side lips 54, 55, and one A radial lip 56 is formed. Among these, the front end edge of the side lip 54 on the outer diameter side is slidably contacted radially outward from the curved surface portion 58 that continues the side surface and the outer peripheral surface at the side surface of the wheel mounting flange 57 of the hub wheel 52. The tip edge of the side lip 55 on the inner diameter side is in sliding contact with the curved surface portion 58. The thickness of the side lip 55 on the inner diameter side is smaller than the thickness of the side lip 54 on the outer diameter side. Therefore, the rigidity of the side lip 55 on the inner diameter side is lower than the rigidity of the side lip 54 on the outer diameter side, and the contact pressure is also lower. Thereby, reduction of rotational torque can be aimed at.

また、この内径側のサイドリップ５５の先端縁を曲面部５８に摺接させることにより、この曲面部５８の曲率半径を大きくできるので、車輪取付フランジ５７の剛性・強度を確保することができる（例えば、特許文献１参照。）。   Further, the radius of curvature of the curved surface portion 58 can be increased by sliding the tip edge of the side lip 55 on the inner diameter side to the curved surface portion 58, so that the rigidity and strength of the wheel mounting flange 57 can be ensured ( For example, see Patent Document 1.)

特開平９−２８７６１９号公報JP-A-9-287619

然しながら、近年、オフロードカーやピックアップトラック等のように、劣悪な環境で運転される車両においては、こうした従来の３本のリップを備えたシール５０では、耐泥水性が不足し、さらに向上させたいという要求があった。   However, in recent years, in a vehicle that is driven in a poor environment such as an off-road car or a pickup truck, the conventional seal 50 provided with three lips lacks muddy water resistance and is desired to be further improved. There was a request.

本発明は、このような従来の問題に鑑みてなされたもので、耐泥水性の向上を図った車輪用軸受シールおよびそれを備えた車輪用軸受装置を提供することを目的とする。   The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a wheel bearing seal with improved muddy water resistance and a wheel bearing device including the same.

係る目的を達成すべく、本発明のうち請求項１に記載の発明は、外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に延びる内径部を有する芯金、およびこの芯金の内径部に加硫接着により一体に接合され、径方向外方に傾斜して延びて垂直な相手部材の側面に所定の軸方向シメシロを介して摺接する一対のサイドリップと、このサイドリップの内径側に、軸受内方側に傾斜して延びるグリースリップを一体に有するシール部材を備え、前記サイドリップとグリースリップとの間にダストリップが形成されている。   In order to achieve such an object, the invention according to claim 1 of the present invention includes a cylindrical fitting portion that is press-fitted into the inner periphery of the end portion of the outer member, and extends radially inward from the fitting portion. A cored bar having an inner diameter part, and integrally joined to the inner diameter part of the cored bar by vulcanization adhesion, extending radially outwardly and extending to a side surface of a vertical mating member via a predetermined axial shimiro A seal member having a pair of side lips in contact with each other and a grease lip integrally extending on the inner diameter side of the side lip so as to incline toward the bearing inner side is provided, and a dust lip is formed between the side lip and the grease lip. ing.

このように、芯金、およびこの芯金の内径部に加硫接着により一体に接合され、径方向外方に傾斜して延びて垂直な相手部材の側面に所定の軸方向シメシロを介して摺接する一対のサイドリップと、このサイドリップの内径側に、軸受内方側に傾斜して延びるグリースリップを一体に有するシール部材を備え、サイドリップとグリースリップとの間にダストリップが形成されているので、耐泥水性の向上を図った車輪用軸受シールを提供することができる。   In this manner, the cored bar and the inner diameter part of the cored bar are integrally joined by vulcanization adhesion, and are inclined to the outer side in the radial direction and slid onto the side surface of the vertical mating member via a predetermined axial shimiro. A seal member having a pair of side lips in contact with each other and a grease lip integrally extending on the inner diameter side of the side lip so as to incline toward the inner side of the bearing is provided, and a dust lip is formed between the side lip and the grease lip. Therefore, it is possible to provide a wheel bearing seal with improved muddy water resistance.

また、本発明のうち請求項２に記載の発明は、外周に懸架装置を構成するナックルに取り付けられるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に前記複列の外側転走面の一方に対向する内側転走面と、この内側転走面から軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に嵌合され、前記複列の外側転走面の他方に対向する内側転走面が形成された内輪または等速自在継手の外側継手部材からなる内方部材と、この内方部材と前記外方部材の両転走面間に転動自在に収容された複列の転動体と、前記外方部材と内方部材との間に形成される環状空間の両端開口部に装着されたシールとを備えた車輪用軸受装置において、前記シールのうちアウター側のシールが、前記外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に延びる内径部を有する芯金、およびこの芯金の内径部に加硫接着により一体に接合され、径方向外方に傾斜して延びる一対のサイドリップと、このサイドリップの内径側に、径方向外方に傾斜して延びるダストリップ、および軸受内方側に傾斜して延びるグリースリップを一体に有するシール部材からなり、前記一対のサイドリップが、前記車輪取付フランジのインナー側の側面に所定の軸方向シメシロを介して摺接されると共に、前記車輪取付フランジのインナー側の基部が断面円弧状の曲面に形成され、この基部に前記ダストリップが所定の軸方向シメシロをもって摺接されている。   Further, the invention according to claim 2 of the present invention has a vehicle body mounting flange integrally attached to the knuckle constituting the suspension device on the outer periphery, and a double row outer rolling surface integrally on the inner periphery. The formed outer member, a wheel mounting flange for mounting the wheel at one end, and an inner rolling surface facing one of the double-row outer rolling surfaces on the outer periphery, and the inner rolling A hub wheel formed with a small-diameter step portion extending in the axial direction from the surface, and an inner rolling surface that is fitted to the small-diameter step portion of the hub wheel and that faces the other of the outer rolling surfaces of the double row are formed. An inner member composed of an outer joint member of an inner ring or a constant velocity universal joint, a double row rolling element that is rotatably accommodated between both rolling surfaces of the inner member and the outer member, and the outer member A seal mounted at both ends of the annular space formed between the member and the inner member. In the wheel bearing apparatus, the outer seal of the seals is a cylindrical fitting portion that is press-fitted into the inner periphery of the end of the outer member, and an inner diameter portion that extends radially inward from the fitting portion. And a pair of side lips that are integrally joined to the inner diameter portion of the core metal by vulcanization bonding and extend obliquely outward in the radial direction, and radially outward on the inner diameter side of the side lip. The pair of side lips is formed on a side surface on the inner side of the wheel mounting flange in a predetermined axial direction. The base portion on the inner side of the wheel mounting flange is formed in a curved surface having an arc cross section, and the dust lip is slid in contact with the base portion with a predetermined axial direction. That.

このように、外方部材と内方部材との間に形成される環状空間の両端開口部に装着されたシールを備えた車輪用軸受装置において、シールのうちアウター側のシールが、外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に延びる内径部を有する芯金、およびこの芯金の内径部に加硫接着により一体に接合され、径方向外方に傾斜して延びる一対のサイドリップと、このサイドリップの内径側に、径方向外方に傾斜して延びるダストリップ、および軸受内方側に傾斜して延びるグリースリップを一体に有するシール部材からなり、一対のサイドリップが、車輪取付フランジのインナー側の側面に所定の軸方向シメシロを介して摺接されると共に、車輪取付フランジのインナー側の基部が断面円弧状の曲面に形成され、この基部にダストリップが所定の軸方向シメシロをもって摺接されているので、シメシロのバラツキを容易に抑えることができ、安定した耐泥水性と低トルク化を図ると共に、軸受の長寿命化を図った車輪用軸受装置を提供することができる。   Thus, in the wheel bearing device provided with the seals mounted on the opening portions at both ends of the annular space formed between the outer member and the inner member, the outer seal of the seals is the outer member. A cylindrical fitting portion that is press-fitted into the inner periphery of the end portion, a metal core having an inner diameter portion that extends radially inward from the fitting portion, and an inner diameter portion of the metal core that are integrally joined by vulcanization adhesion A pair of side lips extending obliquely outward in the radial direction, a dust lip extending obliquely outward in the radial direction, and a grease lip extending inclined inward on the bearing are integrated on the inner diameter side of the side lip. The pair of side lips are slidably contacted to the inner side surface of the wheel mounting flange via a predetermined axial shimiro, and the base portion on the inner side of the wheel mounting flange is a curved surface having an arcuate cross section. Formed into Since the dust lip is slidably contacted with this base portion with a predetermined axial squeezing force, it is possible to easily suppress the unevenness of the squeezing force, to achieve stable muddy water resistance and low torque, and to increase the life of the bearing. The illustrated wheel bearing device can be provided.

また、請求項３に記載の発明のように、前記グリースリップが前記基部に対して所定の径方向シメシロを介して摺接されていれば、軸受内部に充填されたグリースの流出を防止することができ、軸受の長寿命化を図ることができる。   Further, as in the invention described in claim 3, if the grease lip is slidably contacted with the base via a predetermined radial shimeshiro, the grease filled in the bearing is prevented from flowing out. The life of the bearing can be extended.

また、請求項４に記載の発明のように、前記グリースリップが前記基部に対して僅かな径方向すきまを介して対峙し、ラビリンスシールが構成されていれば、低トルク化を図ることができる。   Further, as in the invention described in claim 4, if the grease lip faces the base portion through a slight radial clearance and a labyrinth seal is configured, the torque can be reduced. .

また、請求項５に記載の発明のように、前記芯金が、前記嵌合部と内径部との間に縮径部を備え、前記シール部材が、前記芯金の内径部から縮径部に亙って接合され、この縮径部に接合された外径部に、そのアウター側の端部にフラット部と、径方向外方に突出する凸部が形成されると共に、この凸部の外径が、前記芯金の嵌合部の外径よりも僅かに大径に形成され、前記外方部材の端部内周に弾性変形させて圧入されていれば、外方部材と芯金の嵌合部との気密性が向上し、外部から泥水等が嵌合部から軸受内部に侵入するのを防止することができると共に、軸受内部に充填されたグリースが外部に漏洩するのを防止することができる。   Further, as in the invention described in claim 5, the cored bar is provided with a reduced diameter part between the fitting part and the inner diameter part, and the seal member has a reduced diameter part from the inner diameter part of the cored bar. In the outer diameter portion joined to the reduced diameter portion, a flat portion and a convex portion projecting radially outward are formed at the outer end portion of the outer diameter portion. If the outer diameter is slightly larger than the outer diameter of the fitting portion of the core metal and is elastically deformed and press-fitted to the inner periphery of the end portion of the outer member, the outer member and the core metal Airtightness with the fitting part is improved, muddy water etc. can be prevented from entering the bearing inside from the fitting part, and grease filled in the bearing can be prevented from leaking to the outside. be able to.

また、請求項６に記載の発明のように、前記フラット部の外径と前記外径側のサイドリップの外径との段差が１．０ｍｍ以上に設定されていれば、シール組立時、サイドリップに干渉することなくシール部材のフラット部に圧入治具を押圧し、シールを外方部材に容易に、かつ精度良く安定して圧入することができる。   Further, as in the invention described in claim 6, if the step between the outer diameter of the flat portion and the outer diameter of the side lip on the outer diameter side is set to 1.0 mm or more, the side is A press-fitting jig is pressed against the flat portion of the seal member without interfering with the lip, and the seal can be easily and accurately press-fitted into the outer member.

また、請求項７に記載の発明のように、前記車輪取付フランジのインナー側の基部に金属環が嵌着され、この金属環が、前記ハブ輪の肩部に外嵌される円筒状の嵌合部と、前記基部に対応して円弧状に形成された湾曲部と、この湾曲部から径方向外方に延び、前記車輪取付フランジのインナー側の側面に密着される円板部と、この円板部の外径部から前記車輪取付フランジに対して軸方向に離間して延びる円筒状の傘部とを備え、この傘部が前記外方部材のアウター側の端部外周に沿って僅かな環状のすきまを介して対向配置され、ラビリンスシールが構成されると共に、前記一対のサイドリップが前記円板部に所定の軸方向シメシロを介して摺接されると共に、前記ダストリップが前記湾曲部に所定の軸方向シメシロを介して摺接され、前記グリースリップが前記嵌合部に所定の径方向シメシロを介して摺接されていても良い。   Further, as in the invention according to claim 7, a metal ring is fitted to the base portion on the inner side of the wheel mounting flange, and the metal ring is fitted into a cylindrical fit fitted to the shoulder portion of the hub ring. A joint portion, a curved portion formed in an arc shape corresponding to the base portion, a disc portion extending radially outward from the curved portion and being in close contact with an inner side surface of the wheel mounting flange, and A cylindrical umbrella portion extending axially away from the outer diameter portion of the disc portion with respect to the wheel mounting flange, and the umbrella portion is slightly along the outer periphery of the outer side end portion of the outer member. The labyrinth seal is configured to be opposed to each other through an annular clearance, and the pair of side lips are slidably contacted with the disc portion via a predetermined axial squeezing, and the dust lip is curved. Is slidably contacted with a predetermined axial direction Grease lip may be in sliding contact via a predetermined radial Interference into the fitting portion.

また、請求項８に記載の発明のように、前記金属環の湾曲部が所定の曲率半径Ｒで形成されると共に、前記基部が所定の曲率半径ｒからなる円弧面に形成され、この円弧面に対応して、それぞれの曲率半径Ｒ、ｒがＲ≧ｒになるように設定されていれば、金属環を基部に嵌合した時に基部の円弧面に金属環の湾曲部が干渉して浮き上がるのを防止することができ、車輪取付フランジの側面と金属環の円板部との間にすきまが生じるのが防止されて両者が密着し、一対のサイドリップおよびダストリップのシメシロのバラツキを抑えて安定した密封性を確保することができる。   Further, as in the invention according to claim 8, the curved portion of the metal ring is formed with a predetermined radius of curvature R, and the base portion is formed with an arc surface having a predetermined radius of curvature r. If the curvature radii R and r are set so that R ≧ r, the curved portion of the metal ring interferes with the arc surface of the base and floats when the metal ring is fitted to the base. This prevents the gap between the side surface of the wheel mounting flange and the disc part of the metal ring from sticking to each other, and suppresses variations in the pair of side lip and dust lip. And stable sealing performance can be secured.

また、請求項９に記載の発明のように、前記金属環が前記傘部から径方向外方に突出して形成された折曲部を備えていれば、金属環の剛性を向上させて寸法・形状精度を高めることができると共に、走行中に飛石等の異物がこの金属環に衝突しても変形するのを防止することができる。   Further, as in the ninth aspect of the present invention, if the metal ring includes a bent portion that protrudes radially outward from the umbrella portion, the rigidity of the metal ring is improved. The shape accuracy can be improved, and deformation can be prevented even when a foreign object such as a flying stone collides with the metal ring during traveling.

また、請求項１０に記載の発明のように、前記金属環の素材となる鋼板の表面粗さがＲａ０．２〜０．６の範囲に設定されていれば、良好なシール摺接面を得ることができ、リップ摩耗を抑制すると共に、劣悪な環境で使用されても、シールの密封性能の維持を図ることができる。   Moreover, if the surface roughness of the steel plate used as the material of the metal ring is set in a range of Ra 0.2 to 0.6 as in the invention according to claim 10, a good seal sliding contact surface is obtained. In addition to suppressing lip wear, the sealing performance of the seal can be maintained even when used in a poor environment.

また、請求項１１に記載の発明のように、前記金属環の傘部に弾性リップが加硫接着によって一体に接合され、前記車輪取付フランジの側面に弾性接触されていれば、車輪取付フランジの側面と金属環の円板部との間から異物が浸入するのを防止して基部および金属環の装着部の発錆を長期間に亘って防止することができる。   Further, as in the invention described in claim 11, if the elastic lip is integrally joined to the umbrella portion of the metal ring by vulcanization adhesion and is elastically contacted to the side surface of the wheel mounting flange, the wheel mounting flange It is possible to prevent foreign matter from entering from between the side surface and the disk part of the metal ring, and to prevent rusting of the base part and the mounting part of the metal ring over a long period of time.

また、請求項１２に記載の発明のように、前記シールのうちインナー側のシールが、互いに対向配置され、前記外方部材の端部内周に所定のシメシロを介して圧入された環状のシール板と、前記内輪または外側継手部材の外径に所定のシメシロを介して圧入されたスリンガとからなるパックシールで構成され、前記シール板が、前記外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に屈曲して延びる内径部を備えた芯金、およびこの芯金の内径部に加硫接着により一体に接合され、径方向外方に傾斜して延びる一対のサイドリップと、これらサイドリップの内径側に二股状に延びるダストリップとグリースリップを一体に有するシール部材を備えると共に、前記スリンガが、前記内輪または外側継手部材の外径に圧入される円筒部と、この円筒部から径方向外方に延びる立板部とを備え、前記一対のサイドリップが、前記スリンガの立板部に所定の軸方向シメシロをもって摺接されると共に、前記ダストリップとグリースリップが前記スリンガの円筒部に所定の径方向シメシロを介して摺接され、前記立板部の外縁が前記シール板に対して僅かな径方向すきまを介して対峙し、ラビリンスシールが構成されていれば、外部から泥水等の異物がシール部材に直接侵入するのを防止し、一対のサイドリップおよびダストリップと相俟ってシールの耐泥水性を向上させることができる。   Further, as in the invention described in claim 12, an annular seal plate in which the seals on the inner side among the seals are arranged to face each other and are press-fitted into the inner periphery of the end portion of the outer member via a predetermined shimoshiro. And a cylindrical seal that is press-fitted into the inner periphery of the end of the outer member, and a pack seal comprising a slinger that is press-fitted into the outer diameter of the inner ring or outer joint member through a predetermined shimoshiro. And a metal core having an inner diameter portion that is bent and extended inward in the radial direction from the engagement portion, and is integrally joined to the inner diameter portion of the metal core by vulcanization bonding, and radially outward. The slinger includes a pair of side lips extending in an inclined manner, a seal member integrally including a dust lip and a grease lip extending in a bifurcated shape on the inner diameter side of the side lips, and the slinger has an outer diameter of the inner ring or the outer joint member. A cylindrical portion to be press-fitted and a standing plate portion extending radially outward from the cylindrical portion, and the pair of side lips are slidably contacted with the standing plate portion of the slinger with a predetermined axial squeeze, The dust lip and the grease lip are slidably contacted with the cylindrical portion of the slinger via a predetermined radial squeeze, and the outer edge of the upright plate portion faces the seal plate through a slight radial clearance to form a labyrinth. If the seal is configured, it is possible to prevent foreign matters such as muddy water from directly entering the seal member from the outside, and in combination with the pair of side lip and dust lip, the muddy water resistance of the seal can be improved.

また、請求項１３に記載の発明のように、アウター側の端部に車輪を取り付けるための車輪取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、この外方部材に複列の転動体を介して内挿され、アクスルの肩部から軸方向に延びる軸部に所定のシメシロを介して圧入された一対の内輪と、これら内輪と前記外方部材との間に形成される環状空間の両端開口部に装着されたシールとを備えた車輪用軸受装置において、前記軸部の端部に形成されたねじ部にナットが緊締され、前記一対の内輪が前記アクスルの肩部とナットとで挟持された状態で軸方向に固定され、前記シールのうちインナー側のシールが、前記外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に屈曲して延びる内径部を備えた芯金、およびこの芯金の内径部に加硫接着により一体に接合され、径方向外方に傾斜して延びる一対のサイドリップと、これらサイドリップの内径側に二股状に延びるダストリップとグリースリップを一体に有するシール部材を備え、前記一対のサイドリップが、前記アクスルの肩部に所定の軸方向シメシロを介して摺接されると共に、前記ダストリップとグリースリップが、前記内輪の外径に所定の径方向シメシロを介して摺接されていれば、シールの耐泥水性を向上させると共に、シメシロのバラツキを容易に抑えることができ、安定した密封性と低トルク化を図ることができる。   Further, as in the invention of the thirteenth aspect, an outer wheel mounting flange for mounting the wheel on the outer side end portion is integrally formed, and an outer rolling surface of a double row is integrally formed on the inner periphery. A pair of inner rings inserted into the outer member through double row rolling elements, and press-fitted through a predetermined shimoshiro into a shaft extending in the axial direction from the shoulder of the axle, and the inner rings In a wheel bearing device provided with seals attached to both ends of an annular space formed between the outer member and a nut, a nut is fastened to a screw portion formed at an end portion of the shaft portion, A cylindrical shape in which the pair of inner rings is fixed in the axial direction in a state of being sandwiched between a shoulder portion of the axle and a nut, and an inner seal of the seal is press-fitted into an inner periphery of an end of the outer member. A fitting part and an inner part that is bent and extends radially inward from the fitting part. And a pair of side lips that are integrally joined to the inner diameter portion of the core metal by vulcanization adhesion and extend obliquely outward in the radial direction, and extend bifurcated to the inner diameter side of these side lips. A seal member integrally including a dust lip and a grease lip, wherein the pair of side lips are slidably contacted with a shoulder portion of the axle via a predetermined axial shimiro, and the dust lip and the grease lip are If the inner ring is slidably contacted with the outer diameter of the inner ring via a predetermined radial squeezing force, the mud water resistance of the seal can be improved, and variations in the squeezing force can be easily suppressed, resulting in stable sealing and lower torque. You can plan.

本発明に係る車輪用軸受装置は、外周に懸架装置を構成するナックルに取り付けられるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に前記複列の外側転走面の一方に対向する内側転走面と、この内側転走面から軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に嵌合され、前記複列の外側転走面の他方に対向する内側転走面が形成された内輪または等速自在継手の外側継手部材からなる内方部材と、この内方部材と前記外方部材の両転走面間に転動自在に収容された複列の転動体と、前記外方部材と内方部材との間に形成される環状空間の両端開口部に装着されたシールとを備えた車輪用軸受装置において、前記シールのうちアウター側のシールが、前記外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に延びる内径部を有する芯金、およびこの芯金の内径部に加硫接着により一体に接合され、径方向外方に傾斜して延びる一対のサイドリップと、このサイドリップの内径側に、径方向外方に傾斜して延びるダストリップ、および軸受内方側に傾斜して延びるグリースリップを一体に有するシール部材からなり、前記一対のサイドリップが、前記車輪取付フランジのインナー側の側面に所定の軸方向シメシロを介して摺接されると共に、前記車輪取付フランジのインナー側の基部が断面円弧状の曲面に形成され、この基部に前記ダストリップが所定の軸方向シメシロをもって摺接されているので、シメシロのバラツキを容易に抑えることができ、安定した耐泥水性と低トルク化を図ると共に、軸受の長寿命化を図った車輪用軸受装置を提供することができる。   A wheel bearing device according to the present invention has a vehicle body mounting flange integrally attached to a knuckle constituting a suspension device on an outer periphery, and an outer side in which a double row outer rolling surface is integrally formed on an inner periphery. A member and a wheel mounting flange for attaching a wheel to one end, and an inner rolling surface facing one of the outer rolling surfaces of the double row on the outer periphery, and an axial direction from the inner rolling surface A hub ring formed with an extending small-diameter step portion, and an inner ring that is fitted to the small-diameter step portion of the hub ring and has an inner rolling surface that faces the other of the outer rolling surfaces of the double row, or is freely adjustable. An inner member composed of an outer joint member of the joint, a double row rolling element that is rotatably accommodated between both rolling surfaces of the inner member and the outer member, and the outer member and the inner member. A wheel shaft provided with seals mounted at both ends of an annular space formed between In the apparatus, the outer side seal of the seals includes a cylindrical fitting portion that is press-fitted into the inner periphery of the end portion of the outer member, and a core bar having an inner diameter portion that extends radially inward from the fitting portion. , And a pair of side lips that are integrally joined to the inner diameter portion of the metal core by vulcanization adhesion, and that extend obliquely outward in the radial direction, and extend radially inwardly on the inner diameter side of the side lip. A pair of side lips that slide on a side surface on the inner side of the wheel mounting flange via a predetermined axial squeeze. In addition, the base portion on the inner side of the wheel mounting flange is formed in a curved surface having an arcuate cross section, and the dust lip is slidably contacted with the base portion with a predetermined axial direction. White dispersion can be easily suppressed, and there is ensured a stable muddy water resistance and low torque, it is possible to provide a wheel bearing apparatus which aimed to extend the life of the bearing.

本発明に係る車輪用軸受装置の第１の実施形態を示す縦断面図である。It is a longitudinal section showing a 1st embodiment of a bearing device for wheels concerning the present invention. 図１のアウター側のシール部を示す要部拡大図である。It is a principal part enlarged view which shows the seal | sticker part of the outer side of FIG. 図１のインナー側のシール部を示す要部拡大図である。It is a principal part enlarged view which shows the seal part of the inner side of FIG. 図２のシール部の変形例を示す要部拡大図である。It is a principal part enlarged view which shows the modification of the seal part of FIG. 同上、他の変形例を示す要部拡大図である。It is a principal part enlarged view which shows another modification same as the above. 図５のシール単体を示す拡大図である。FIG. 6 is an enlarged view showing a single seal of FIG. 5. 図５のシール部の変形例を示す要部拡大図である。It is a principal part enlarged view which shows the modification of the seal | sticker part of FIG. 同上、他の変形例を示す要部拡大図である。It is a principal part enlarged view which shows another modification same as the above. 同上、他の変形例を示す要部拡大図である。It is a principal part enlarged view which shows another modification same as the above. 本発明に係る車輪用軸受装置の第２の実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows 2nd Embodiment of the wheel bearing apparatus which concerns on this invention. 図１０のインナー側のシール部を示す要部拡大図である。It is a principal part enlarged view which shows the seal part of the inner side of FIG. 従来のシール構造を示す要部拡大図である。It is a principal part enlarged view which shows the conventional seal structure.

外周に懸架装置を構成するナックルに取り付けられるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に前記複列の外側転走面の一方に対向する内側転走面と、この内側転走面から軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に嵌合され、前記複列の外側転走面の他方に対向する内側転走面が形成された内輪からなる内方部材と、この内方部材と前記外方部材の両転走面間に転動自在に収容された複列の転動体と、前記外方部材と内方部材との間に形成される環状空間の両端開口部に装着されたシールとを備えた車輪用軸受装置において、前記シールのうちアウター側のシールが、前記外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に延びる内径部を有する芯金、およびこの芯金の内径部に加硫接着により一体に接合され、径方向外方に傾斜して延びる一対のサイドリップと、このサイドリップの内径側に、径方向外方に傾斜して延びるダストリップ、および軸受内方側に傾斜して延びるグリースリップを一体に有するシール部材からなり、前記一対のサイドリップが、前記車輪取付フランジのインナー側の側面に所定の軸方向シメシロを介して摺接されると共に、前記車輪取付フランジのインナー側の基部が断面円弧状の曲面に形成され、この基部に、前記ダストリップが所定の軸方向シメシロを介して摺接され、前記グリースリップが所定の径方向シメシロを介して摺接されている。   An outer member that integrally has a vehicle body mounting flange to be attached to a knuckle constituting a suspension device on the outer periphery, and an outer member in which a double row outer rolling surface is integrally formed on the inner periphery, and a wheel on one end A hub wheel integrally having a wheel mounting flange and having an inner rolling surface opposed to one of the double-row outer rolling surfaces and a small-diameter step portion extending in the axial direction from the inner rolling surface. And an inner member formed of an inner ring that is fitted to a small-diameter step portion of the hub wheel and has an inner rolling surface that faces the other of the outer rolling surfaces of the double row, and the inner member and the outer member. A double-row rolling element accommodated between both rolling surfaces of the lateral member, and a seal attached to both end openings of the annular space formed between the outer member and the inner member; In the wheel bearing device comprising: the outer seal of the seals is the outer A cylindrical fitting portion that is press-fitted into the inner periphery of the end of the material, a metal core having an inner diameter portion extending radially inward from the fitting portion, and an inner diameter portion of the metal core are integrally joined by vulcanization adhesion A pair of side lips extending obliquely outward in the radial direction, a dust lip extending obliquely outward in the radial direction on the inner diameter side of the side lip, and a grease lip extending inclined toward the inner side of the bearing The pair of side lips are slidably contacted with the side surface on the inner side of the wheel mounting flange via a predetermined axial nip, and the base portion on the inner side of the wheel mounting flange has a cross-section. It is formed in an arcuate curved surface, and the dust lip is slidably contacted with the base via a predetermined axial shimiro, and the grease lip is slidably contacted with a predetermined radial shimiro.

以下、本発明の実施の形態を図面に基づいて詳細に説明する。
図１は、本発明に係る車輪用軸受装置の第１の実施形態を示す縦断面図、図２は、図１のアウター側のシール部を示す要部拡大図、図３は、図１のインナー側のシール部を示す要部拡大図、図４は、図２のシール部の変形例を示す要部拡大図、図５は、図２のシール部の他の変形例を示す要部拡大図、図６は、図５のシール単体を示す拡大図、図７は、図５のシール部の変形例を示す要部拡大図、図８は、図５のシール部の他の変形例を示す要部拡大図、図９は、図５のシール部の他の変形例を示す要部拡大図である。なお、以下の説明では、車両に組み付けた状態で車両の外側寄りとなる側をアウター側（図１の左側）、中央寄り側をインナー側（図１の右側）という。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention, FIG. 2 is an enlarged view of a main part showing a seal part on the outer side of FIG. 1, and FIG. FIG. 4 is an enlarged view of a main part showing a modification of the seal part of FIG. 2, and FIG. 5 is an enlarged view of a main part showing another modification of the seal part of FIG. 6 is an enlarged view showing a single seal of FIG. 5, FIG. 7 is an enlarged view of a main part showing a modification of the seal part of FIG. 5, and FIG. 8 is another modification of the seal part of FIG. FIG. 9 is an enlarged view of a main part showing another modification of the seal part in FIG. 5. In the following description, the side closer to the outer side of the vehicle when assembled to the vehicle is referred to as the outer side (left side in FIG. 1), and the side closer to the center is referred to as the inner side (right side in FIG. 1).

この車輪用軸受装置は駆動輪用の第３世代と称され、ハブ輪１と、このハブ輪１に圧入された内輪２とからなる内方部材３と、この内方部材３に複列の転動体（ボール）４、４を介して外挿された外方部材５とを備えている。   This wheel bearing device is called the third generation for driving wheels, and includes an inner member 3 composed of a hub wheel 1 and an inner ring 2 press-fitted into the hub wheel 1, and a double row of inner members 3. And an outer member 5 inserted through rolling elements (balls) 4 and 4.

ハブ輪１は、アウター側の端部に車輪（図示せず）を取り付けるための車輪取付フランジ６を一体に有し、外周に一方（アウター側）の内側転走面１ａと、この内側転走面１ａから軸方向に延びる小径段部１ｂが形成され、内周にトルク伝達用のセレーション（またはスプライン）１ｃが形成されている。また、車輪取付フランジ６の周方向等配位置にハブボルト６ａが植設されている。内輪２は、外周に他方（インナー側）の内側転走面２ａが形成され、ハブ輪１の小径段部１ｂに所定のシメシロを介して圧入固定されている。   The hub wheel 1 integrally has a wheel mounting flange 6 for attaching a wheel (not shown) to an end portion on the outer side, one (outer side) inner rolling surface 1a on the outer periphery, and this inner rolling. A small diameter step 1b extending in the axial direction from the surface 1a is formed, and a serration (or spline) 1c for torque transmission is formed on the inner periphery. Further, hub bolts 6 a are implanted at circumferentially equidistant positions of the wheel mounting flange 6. The inner ring 2 is formed with the other (inner side) inner rolling surface 2a on the outer periphery, and is press-fitted and fixed to the small-diameter step portion 1b of the hub ring 1 through a predetermined shimiro.

ハブ輪１はＳ５３Ｃ等の炭素０．４０〜０．８０ｗｔ％を含む中高炭素鋼で形成され、内側転走面１ａをはじめ、後述するシール８のシールランド部となる車輪取付フランジ６のインナー側の基部６ｂから小径段部１ｂに亙って高周波焼入れによって５８〜６４ＨＲＣの範囲に表面が硬化処理されている。一方、内輪２および転動体４はＳＵＪ２等の高炭素クロム鋼で形成され、ズブ焼入れによって芯部まで５８〜６４ＨＲＣの範囲に硬化処理されている。   The hub wheel 1 is made of medium and high carbon steel containing carbon of 0.40 to 0.80 wt% such as S53C, and includes an inner rolling surface 1a and an inner side of a wheel mounting flange 6 that becomes a seal land portion of a seal 8 to be described later. The surface is hardened in the range of 58 to 64 HRC by induction hardening from the base 6b to the small diameter step 1b. On the other hand, the inner ring 2 and the rolling element 4 are made of high carbon chrome steel such as SUJ2, and are hardened in the range of 58 to 64 HRC up to the core part by quenching.

外方部材５は、外周に懸架装置を構成するナックル（図示せず）に取り付けられるための車体取付フランジ５ｂを一体に有し、内周に内方部材３の内側転走面１ａ、２ａに対向する複列の外側転走面５ａ、５ａが一体に形成されている。これら両転走面５ａ、１ａおよび５ａ、２ａ間には保持器７を介して複列の転動体４、４が転動自在に収容されている。   The outer member 5 integrally has a vehicle body mounting flange 5b to be attached to a knuckle (not shown) constituting a suspension device on the outer periphery, and the inner rolling surfaces 1a and 2a of the inner member 3 on the inner periphery. Opposing double-row outer rolling surfaces 5a and 5a are integrally formed. Between these rolling surfaces 5a, 1a and 5a, 2a, double-row rolling elements 4, 4 are accommodated via a cage 7 so as to roll freely.

外方部材５はＳ５３Ｃ等の炭素０．４０〜０．８０ｗｔ％を含む中高炭素鋼で形成され、少なくとも複列の外側転走面５ａ、５ａが高周波焼入れによって５８〜６４ＨＲＣの範囲に表面が硬化処理されている。また、外方部材５と内方部材３との間に形成される環状空間の両端開口部にシール８、９が装着され、軸受内部に封入された潤滑グリースの外部への漏洩と、外部から雨水やダスト等が軸受内部に浸入するのを防止している。   The outer member 5 is made of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and at least the double row outer rolling surfaces 5a and 5a are hardened in the range of 58 to 64 HRC by induction hardening. Has been processed. In addition, seals 8 and 9 are attached to both ends of the annular space formed between the outer member 5 and the inner member 3, and leakage of the lubricating grease enclosed in the bearing to the outside and from the outside It prevents rainwater and dust from entering the bearing.

シール８、９のうちアウター側のシール８は、外方部材５のアウター側端部の内周に所定のシメシロを介して圧入された芯金１０と、この芯金１０に接合されたシール部材１１とからなる一体型のシールで構成されている。   The seal 8 on the outer side of the seals 8 and 9 includes a core bar 10 press-fitted to the inner periphery of the outer end portion of the outer member 5 via a predetermined shimiro, and a seal member joined to the core bar 10. 11 and an integral seal.

シール８の芯金１０は、オーステナイト系ステンレス鋼鈑（ＪＩＳ規格のＳＵＳ３０４系）や冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系）等、防錆能を有する鋼鈑からプレス加工にて断面が略Ｌ字状に、全体として円環状に形成され、外方部材５の端部内周に圧入される円筒状の嵌合部１０ａと、この嵌合部１０ａから径方向内方に屈曲して延びる内径部１０ｂを備えている。   The metal core 10 of the seal 8 has a substantially cross-sectional shape by press working from a steel plate having rust prevention ability such as an austenitic stainless steel plate (JIS standard SUS304 type) or a cold rolled steel plate (JIS standard SPCC type). A cylindrical fitting portion 10a that is formed in an L shape in a ring shape as a whole and is press-fitted into the inner periphery of the end portion of the outer member 5, and an inner diameter that is bent and extends radially inward from the fitting portion 10a. A portion 10b is provided.

一方、シール部材１１はＮＢＲ（アクリロニトリル−ブタジエンゴム）等の合成ゴムからなり、加硫接着によって芯金１０に一体に接合されている。このシール部材１１は、図２に拡大して示すように、径方向外方に傾斜して延びる一対のサイドリップ１１ａ、１１ｂと、これらサイドリップ１１ａ、１１ｂの内径側に同じく径方向外方に僅かに傾斜して延びるダストリップ１１ｃ、および軸受内方側に傾斜して延びるグリースリップ１１ｄを一体に有している。   On the other hand, the seal member 11 is made of synthetic rubber such as NBR (acrylonitrile-butadiene rubber) and is integrally joined to the cored bar 10 by vulcanization adhesion. As shown in an enlarged view in FIG. 2, the seal member 11 includes a pair of side lips 11a and 11b extending obliquely outward in the radial direction, and radially outward of the side lips 11a and 11b. A dust strip 11c extending slightly incline and a grease lip 11d extending incline toward the bearing inward side are integrally provided.

ここで、一対のサイドリップ１１ａ、１１ｂは、車輪取付フランジ６の側面６ｃに対して、所定の軸方向シメシロをもって摺接されている。これにより、シール８の耐泥水性を向上させると共に、シメシロのバラツキを容易に抑えることができ、安定した密封性と低トルク化を図ることができる。また、車輪取付フランジ６のインナー側の基部６ｂは断面が円弧状の曲面に形成され、この基部６ｂにダストリップ１１ｃが所定の軸方向シメシロをもって摺接されると共に、グリースリップ１１ｄが所定の径方向シメシロを介して摺接されている。これにより、シール８の耐泥水性をさらに向上させると共に、軸受内部に充填されたグリースの流出を防止することができ、軸受の長寿命化を図った車輪用軸受装置を提供することができる。そして、基部６ｂの曲率半径を大きくできるので、車輪取付フランジ６の剛性・強度を確保することができる。   Here, the pair of side lips 11 a and 11 b are in sliding contact with the side surface 6 c of the wheel mounting flange 6 with a predetermined axial direction. As a result, the mud water resistance of the seal 8 can be improved, and the variation of the shimoshiro can be easily suppressed, so that stable sealing performance and torque reduction can be achieved. The base portion 6b on the inner side of the wheel mounting flange 6 is formed in a curved surface having an arc-shaped cross section, and a dust lip 11c is slidably contacted with the base portion 6b with a predetermined axial direction and a grease lip 11d has a predetermined diameter. It is slidably contacted through a direction shimoshiro. Thereby, while improving the mud water resistance of the seal | sticker 8, the outflow of the grease with which the inside of a bearing was filled can be prevented, and the wheel bearing apparatus which aimed at the lifetime improvement of the bearing can be provided. And since the curvature radius of the base 6b can be enlarged, the rigidity and intensity | strength of the wheel mounting flange 6 are securable.

なお、シール部材１１の材質としては、ＮＢＲ以外にも、例えば、耐熱性に優れたＨＮＢＲ（水素化アクリロニトリル・ブタジエンゴム）、ＥＰＤＭ（エチレンプロピレンゴム）等をはじめ、耐熱性、耐薬品性に優れたＡＣＭ（ポリアクリルゴム）、ＦＫＭ（フッ素ゴム）、あるいはシリコンゴム等を例示することができる。   In addition to NBR, the material of the seal member 11 is excellent in heat resistance and chemical resistance, such as HNBR (hydrogenated acrylonitrile butadiene rubber), EPDM (ethylene propylene rubber), etc., which are excellent in heat resistance. Examples thereof include ACM (polyacrylic rubber), FKM (fluororubber), and silicon rubber.

インナー側のシール９は、互いに対向配置され、固定側部材となる外方部材５のインナー側の端部内周に所定のシメシロを介して圧入された環状のシール板１２と、回転側部材となる内輪２の外径に所定のシメシロを介して圧入されたスリンガ１３とからなる、所謂パックシールで構成されている。   The inner-side seal 9 is disposed opposite to each other, and is an annular seal plate 12 that is press-fitted through a predetermined shimiro to the inner periphery of the inner-side end of the outer member 5 that is a fixed-side member, and serves as a rotation-side member. It is constituted by a so-called pack seal composed of a slinger 13 press-fitted into the outer diameter of the inner ring 2 via a predetermined scissors.

シール９のシール板１２は、図３に拡大して示すように、芯金１４と、この芯金１４に接合されたシール部材１５とからなる。芯金１４は、オーステナイト系ステンレス鋼鈑（ＪＩＳ規格のＳＵＳ３０４系）や冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系）等、防錆能を有する鋼鈑からプレス加工にて断面が略Ｌ字状に、全体として円環状に形成され、外方部材５の端部内周に圧入される円筒状の嵌合部１４ａと、この嵌合部１４ａから径方向内方に屈曲して延びる内径部１４ｂを備えている。   As shown in an enlarged view in FIG. 3, the seal plate 12 of the seal 9 includes a cored bar 14 and a seal member 15 joined to the cored bar 14. The metal core 14 has a substantially L-shaped cross section by press working from a steel plate having rust prevention ability such as an austenitic stainless steel plate (JIS standard SUS304 type) or a cold rolled steel plate (JIS standard SPCC type). A cylindrical fitting portion 14a that is formed in an annular shape as a whole and is press-fitted into the inner periphery of the end portion of the outer member 5, and an inner diameter portion 14b that is bent and extends radially inward from the fitting portion 14a. I have.

一方、シール部材１５はＮＢＲ等の合成ゴムからなり、加硫接着によって芯金１４に一体に接合されている。このシール部材１５は、径方向外方に傾斜して延びる一対のサイドリップ１５ａ、１５ｂと、これらサイドリップ１５ａ、１５ｂの内径側に二股状に延びるダストリップ１５ｃとグリースリップ１５ｄを一体に有している。   On the other hand, the seal member 15 is made of synthetic rubber such as NBR and is integrally joined to the cored bar 14 by vulcanization adhesion. The seal member 15 integrally includes a pair of side lips 15a and 15b extending obliquely outward in the radial direction, and a dust lip 15c and a grease lip 15d extending in a forked manner on the inner diameter side of the side lips 15a and 15b. ing.

スリンガ１３は、フェライト系ステンレス鋼鈑（ＪＩＳ規格のＳＵＳ４３０系等）やオーステナイト系ステンレス鋼鈑（ＪＩＳ規格のＳＵＳ３０４系）、あるいは冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系）等、防錆能を有する鋼鈑からプレス加工にて形成され、内輪２の外径に圧入される円筒部１３ａと、この円筒部１３ａから径方向外方に延びる立板部１３ｂとを備え、断面が略Ｌ字状で、全体として円環状に形成されている。   Slinger 13 has ferritic stainless steel (JIS standard SUS430, etc.), austenitic stainless steel (JIS standard SUS304), cold rolled steel (JIS standard SPCC), etc. A cylindrical portion 13a that is formed by press working from a steel plate having the inner ring 2 and is press-fitted into the outer diameter of the inner ring 2, and a standing plate portion 13b that extends radially outward from the cylindrical portion 13a, and has a substantially L-shaped cross section. Therefore, it is formed in an annular shape as a whole.

そして、シール部材１５の一対のサイドリップ１５ａ、１５ｂは、スリンガ１３の立板部１３ｂに所定の軸方向シメシロをもって摺接されると共に、ダストリップ１５ｃとグリースリップ１５ｄがスリンガ１３の円筒部１３ａに所定の径方向シメシロを介して摺接されている。ここで、立板部１３ｂのインナー側の側面に磁気エンコーダ１６が加硫接着により一体に接合されている。この磁気エンコーダ１６は、エラストマに磁性体粉が混入され、周方向等配で交互に磁極Ｎ、Ｓが着磁されてロータリエンコーダを構成している。   The pair of side lips 15 a and 15 b of the seal member 15 are slidably contacted with the standing plate portion 13 b of the slinger 13 with a predetermined axial squeeze, and the dust lip 15 c and the grease lip 15 d are in contact with the cylindrical portion 13 a of the slinger 13. It is slidably contacted via a predetermined radial direction shishiro. Here, the magnetic encoder 16 is integrally joined to the inner side surface of the upright plate portion 13b by vulcanization adhesion. This magnetic encoder 16 constitutes a rotary encoder in which magnetic powder is mixed in an elastomer, and magnetic poles N and S are alternately magnetized at equal intervals in the circumferential direction.

また、磁気エンコーダ１６は立板部１３ｂの外縁のアウター側の側面にまで回り込んで固着され、シール板１２に対して僅かな径方向すきまを介して対峙し、ラビリンスシール１７を構成している。これにより、磁気エンコーダ１６の固着力が高まり、長期間に亘って立板部１３ｂから剥れるのを防止すると共に、外部から泥水等の異物がシール部材１５に直接侵入するのを防止し、一対のサイドリップ１５ａ、１５ｂおよびダストリップ１５ｃと相俟ってシール９の耐泥水性を向上させる。   Further, the magnetic encoder 16 is fixed to the outer side of the outer edge of the upright plate portion 13b so as to face the seal plate 12 through a slight radial clearance to form a labyrinth seal 17. . As a result, the fixing force of the magnetic encoder 16 is increased, and the magnetic encoder 16 is prevented from being peeled off from the standing plate portion 13b for a long period of time, and foreign matter such as muddy water is prevented from directly entering the seal member 15 from the outside. Together with the side lips 15a and 15b and the dust lip 15c, the muddy water resistance of the seal 9 is improved.

なお、シール部材１５の材質としては、ＮＢＲ以外にも、例えば、耐熱性に優れたＨＮＢＲ、ＥＰＤＭ等をはじめ、耐熱性、耐薬品性に優れたＡＣＭ、ＦＫＭ、あるいはシリコンゴム等を例示することができる。   In addition to NBR, examples of the material of the seal member 15 include HNBR and EPDM having excellent heat resistance, ACM, FKM, or silicon rubber having excellent heat resistance and chemical resistance. Can do.

なお、ここでは、転動体４にボールを使用した複列アンギュラ玉軸受で構成された車輪用軸受装置を例示したが、本発明はこれに限らず、転動体４に円錐ころを使用した複列円錐ころ軸受で構成されていても良い。さらに、例示した第３世代構造に限らず、第４世代構造であっても良い。   In addition, although the wheel bearing apparatus comprised by the double row angular contact ball bearing which used the ball for the rolling element 4 was illustrated here, this invention is not limited to this, The double row using the tapered roller for the rolling element 4 You may be comprised with the tapered roller bearing. Furthermore, it is not limited to the illustrated third generation structure, but may be a fourth generation structure.

図４に示すシール１８は、図２のシール８の変形例である。なお、このシール１８は、基本的にはシール８とシール部材のグリースリップの構成が異なるだけで、その他同一部品同一部位あるいは同一機能を有する部品や部位には同じ符号を付して詳細な説明を省略する。   A seal 18 shown in FIG. 4 is a modification of the seal 8 of FIG. The seal 18 basically differs from the seal 8 only in the configuration of the grease lip of the seal member, and other parts and portions having the same parts or functions having the same functions are designated by the same reference numerals. Is omitted.

シール１８は、外方部材５のアウター側の端部内周に所定のシメシロを介して圧入された芯金１０と、この芯金１０に一体に接合されたシール部材１９とからなる一体型のシールで構成されている。   The seal 18 is an integrated seal comprising a cored bar 10 press-fitted into the inner periphery of the outer side end portion of the outer member 5 via a predetermined shimiro, and a seal member 19 integrally joined to the cored bar 10. It consists of

シール部材１９はＮＢＲ等の合成ゴムからなり、加硫接着によって芯金１０の内径部１０ｂに一体に接合されている。このシール部材１９は、径方向外方に傾斜して延びる一対のサイドリップ１１ａ、１１ｂと、これらサイドリップ１１ａ、１１ｂの内径側に同じく径方向外方に僅かに傾斜して延びるダストリップ１１ｃ、および軸受内方側に傾斜して延びるグリースリップ１９ａを一体に有している。   The seal member 19 is made of synthetic rubber such as NBR, and is integrally joined to the inner diameter portion 10b of the core metal 10 by vulcanization adhesion. The seal member 19 includes a pair of side lips 11a and 11b extending obliquely outward in the radial direction, and a dust lip 11c extending slightly inclined outward in the radial direction on the inner diameter side of the side lips 11a and 11b. And a grease lip 19a extending in an inclined manner toward the bearing inward side.

ここで、一対のサイドリップ１１ａ、１１ｂが、車輪取付フランジ６の側面６ｃに対して、所定の軸方向シメシロをもって摺接されると共に、ダストリップ１１ｃが、断面が円弧状の曲面に形成された車輪取付フランジ６のインナー側の基部６ｂに対して、所定の軸方向シメシロをもって摺接されている。また、グリースリップ１９ａが基部６ｂに僅かな径方向すきまを介して対峙し、ラビリンスシールを構成している。これにより、シール１８の耐泥水性を向上させると共に、低トルク化を図ることができる。   Here, the pair of side lips 11a and 11b are slidably brought into contact with the side surface 6c of the wheel mounting flange 6 with a predetermined axial squeeze, and the dust lip 11c is formed in a curved surface having an arcuate cross section. The wheel mounting flange 6 is in sliding contact with the base 6b on the inner side with a predetermined axial direction. Further, the grease lip 19a faces the base portion 6b via a slight radial clearance to constitute a labyrinth seal. Thereby, the mud water resistance of the seal 18 can be improved and the torque can be reduced.

図５に示すシール２０は、図２のシール８の他の変形例である。なお、このシール２０は、基本的にはシール８と、芯金およびシール部材の一部の構成が異なるだけで、その他同一部品同一部位あるいは同一機能を有する部品や部位には同じ符号を付して詳細な説明を省略する。   A seal 20 shown in FIG. 5 is another modification of the seal 8 of FIG. The seal 20 basically differs from the seal 8 only in the configuration of a part of the cored bar and the seal member, and other parts and parts having the same function or the same function are denoted by the same reference numerals. Detailed description is omitted.

シール２０は、外方部材５のアウター側の端部内周に所定のシメシロを介して圧入された芯金２１と、この芯金２１に一体に接合されたシール部材２２とからなる一体型のシールで構成されている。   The seal 20 is a one-piece seal composed of a core metal 21 press-fitted into the outer periphery of the outer side end of the outer member 5 via a predetermined shimiro and a seal member 22 integrally joined to the core metal 21. It consists of

芯金２１は、オーステナイト系ステンレス鋼鈑（ＪＩＳ規格のＳＵＳ３０４系）や冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系）等、防錆能を有する鋼鈑からプレス加工にて断面が略Ｌ字状に、全体として円環状に形成され、外方部材５の端部内周に圧入される円筒状の嵌合部２１ａと、この嵌合部２１ａから縮径部２１ｂを介して径方向内方に屈曲して延びる内径部２１ｃを備えている。   The metal core 21 has a substantially L-shaped cross section by pressing from a steel plate having rust prevention ability, such as an austenitic stainless steel plate (JIS standard SUS304 type) or a cold rolled steel plate (JIS standard SPCC type). In addition, a cylindrical fitting portion 21a that is formed in an annular shape as a whole and is press-fitted into the inner periphery of the end portion of the outer member 5, and is bent radially inward from the fitting portion 21a via the reduced diameter portion 21b. And an inner diameter portion 21c extending.

一方、シール部材２２はＮＢＲ等の合成ゴムからなり、加硫接着によって芯金２１の内径部２１ｂから縮径部２１ｂに亙って接合され、この縮径部２１ｂに接合された外径部２２ａと、径方向外方に傾斜して延びる一対のサイドリップ１１ａ、１１ｂと、これらサイドリップ１１ａ、１１ｂの内径側に、径方向外方に傾斜して延びるダストリップ１１ｃ、および軸受内方側に傾斜して延びるグリースリップ１１ｄを一体に有している。   On the other hand, the seal member 22 is made of a synthetic rubber such as NBR, and is joined from the inner diameter part 21b of the cored bar 21 to the reduced diameter part 21b by vulcanization adhesion, and the outer diameter part 22a joined to the reduced diameter part 21b. And a pair of side lips 11a, 11b extending obliquely outward in the radial direction, an inner diameter side of the side lips 11a, 11b, a dust lip 11c extending inclined outward in the radial direction, and an inner side of the bearing A grease lip 11d extending in an inclined manner is integrally provided.

ここで、図６にシール２０単体を示すが、シール部材２２の外径部２２ａには、そのアウター側の端部にフラット部２３と、径方向外方に突出する凸部２４が形成されている。この凸部２４の外径は芯金２１の嵌合部２１ａの外径よりも僅かに大径に形成され、外方部材５の端部内周に弾性変形させて圧入される、所謂ハーフメタル嵌合とされている。これにより、外方部材５と芯金２１の嵌合部２１ａとの気密性が向上し、外部から泥水等が嵌合部２１ａから軸受内部に侵入するのを防止することができると共に、軸受内部に充填されたグリースが外部に漏洩するのを防止することができる。   Here, FIG. 6 shows the seal 20 alone, but the outer diameter portion 22a of the seal member 22 is formed with a flat portion 23 at the outer end portion thereof and a convex portion 24 protruding radially outward. Yes. The outer diameter of the convex portion 24 is formed to be slightly larger than the outer diameter of the fitting portion 21a of the metal core 21, and is so-called half metal fitting that is elastically deformed and press-fitted into the inner periphery of the end portion of the outer member 5. It is a good match. As a result, the airtightness between the outer member 5 and the fitting portion 21a of the cored bar 21 is improved, and muddy water or the like can be prevented from entering the bearing inside from the fitting portion 21a. The grease filled in can be prevented from leaking to the outside.

また、フラット部２３の外径と外径側のサイドリップ１１ａの外径との段差Ａが１．０ｍｍ以上に設定されている。これにより、シール組立時、サイドリップ１１ａに干渉することなくシール部材２２のフラット部２３に圧入治具（図示せず）を押圧し、シール２０を外方部材５に容易に、かつ精度良く安定して圧入することができる。   Further, the step A between the outer diameter of the flat portion 23 and the outer diameter of the side lip 11a on the outer diameter side is set to 1.0 mm or more. Thus, when the seal is assembled, a press-fitting jig (not shown) is pressed against the flat portion 23 of the seal member 22 without interfering with the side lip 11a, and the seal 20 is easily and accurately stabilized against the outer member 5. And can be press-fitted.

図７に示すシール２５は、図５のシール２０の変形例である。なお、このシール２５は、基本的にはシール２０と、芯金およびシール部材の一部の構成が異なるだけで、その他同一部品同一部位あるいは同一機能を有する部品や部位には同じ符号を付して詳細な説明を省略する。   A seal 25 shown in FIG. 7 is a modification of the seal 20 shown in FIG. The seal 25 basically differs from the seal 20 only in the configuration of a part of the cored bar and the seal member, and other parts and parts having the same function or the same function are denoted by the same reference numerals. Detailed description is omitted.

シール２５は、外方部材５のアウター側の端部内周に所定のシメシロを介して圧入された芯金２６と、この芯金２６に一体に接合されたシール部材２７とからなる一体型のシールで構成されている。   The seal 25 is a one-piece seal composed of a core metal 26 press-fitted into the outer periphery of the outer side end portion of the outer member 5 via a predetermined shimiro and a seal member 27 integrally joined to the core metal 26. It consists of

芯金２６は、オーステナイト系ステンレス鋼鈑（ＪＩＳ規格のＳＵＳ３０４系）や冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系）等、防錆能を有する鋼鈑からプレス加工にて断面が略Ｌ字状に、全体として円環状に形成され、外方部材５の端部内周に圧入される円筒状の嵌合部２１ａと、この嵌合部２１ａからテーパ部２６ａを介して径方向内方に屈曲して延びる内径部２１ｃとを備えている。   The metal core 26 has a substantially L-shaped cross section by pressing from a steel plate having rust prevention ability such as an austenitic stainless steel plate (JIS standard SUS304 type) or a cold rolled steel plate (JIS standard SPCC type). In addition, a cylindrical fitting portion 21a that is formed in an annular shape as a whole and is press-fitted into the inner periphery of the end portion of the outer member 5, and is bent radially inward from the fitting portion 21a via a tapered portion 26a. And an inner diameter portion 21c extending.

一方、シール部材２７はＮＢＲ等の合成ゴムからなり、加硫接着によって芯金２６の内径部２１ｃからテーパ部２６ａに亙って接合され、このテーパ部２６ａに接合された外径部２７ａと、径方向外方に傾斜して延びる一対のサイドリップ１１ａ、１１ｂと、これらサイドリップ１１ａ、１１ｂの内径側に、二股状に形成されたダストリップ２７ｂとグリースリップ２７ｃとを一体に有している。   On the other hand, the seal member 27 is made of a synthetic rubber such as NBR, and is joined over the taper portion 26a from the inner diameter portion 21c of the core metal 26 by vulcanization adhesion, and the outer diameter portion 27a joined to the taper portion 26a; A pair of side lips 11a and 11b extending obliquely outward in the radial direction, and a duster lip 27b and a grease lip 27c formed in a bifurcated shape are integrally provided on the inner diameter side of the side lips 11a and 11b. .

ここで、一対のサイドリップ１１ａ、１１ｂが、車輪取付フランジ６の側面６ｃに対して、所定の軸方向シメシロをもって摺接されると共に、ダストリップ２７ｂとグリースリップ２７ｃが、断面が円弧状の曲面に形成された車輪取付フランジ６のインナー側の基部６ｂに対して、所定の径方向シメシロをもって摺接されている。   Here, the pair of side lips 11a and 11b are slidably contacted with the side surface 6c of the wheel mounting flange 6 with a predetermined axial squeeze, and the dust lip 27b and the grease lip 27c are curved surfaces having an arcuate cross section. The base portion 6b on the inner side of the wheel mounting flange 6 is formed in sliding contact with a predetermined radial direction.

また、シール部材２７には、アウター側の端部にフラット部２３’が形成されると共に、外径部２７ａの外径が芯金２６の嵌合部２１ａの外径よりも僅かに大径に形成され、外方部材５の端部内周に弾性変形させて圧入されている。これにより、外方部材５と芯金２１の嵌合部２１ａとの気密性が向上し、外部から泥水等が嵌合部２１ａから軸受内部に侵入するのを防止することができると共に、軸受内部に充填されたグリースが外部に漏洩するのを防止することができる。   Further, the seal member 27 is formed with a flat portion 23 ′ at the outer end, and the outer diameter of the outer diameter portion 27 a is slightly larger than the outer diameter of the fitting portion 21 a of the core metal 26. Formed and elastically deformed and press-fitted into the inner periphery of the end of the outer member 5. As a result, the airtightness between the outer member 5 and the fitting portion 21a of the cored bar 21 is improved, and muddy water or the like can be prevented from entering the bearing inside from the fitting portion 21a. The grease filled in can be prevented from leaking to the outside.

さらに、前述した実施形態と同様、シール２５の単体時におけるフラット部２３’の外径と外径側のサイドリップ１１ａの外径との段差を１．０ｍｍ以上に設定すれば、シール組立時、サイドリップ１１ａに干渉することなくフラット部２３’を押圧してシール２５を外方部材５に圧入することができる。   Furthermore, as in the above-described embodiment, if the step between the outer diameter of the flat portion 23 ′ and the outer diameter of the side lip 11 a on the outer diameter side when the seal 25 is a single unit is set to 1.0 mm or more, The flat portion 23 ′ can be pressed without interfering with the side lip 11 a to press-fit the seal 25 into the outer member 5.

図８に示すシール２８は、図５のシール２０の他の変形例である。なお、このシール２８は、基本的にはシール２０と、芯金およびシール部材の一部の構成が異なるだけで、その他同一部品同一部位あるいは同一機能を有する部品や部位には同じ符号を付して詳細な説明を省略する。   A seal 28 shown in FIG. 8 is another modification of the seal 20 of FIG. The seal 28 basically differs from the seal 20 only in the configuration of a part of the core metal and the seal member, and other parts and parts having the same parts or the same functions are denoted by the same reference numerals. Detailed description is omitted.

シール２８は、外方部材５のアウター側の端部内周に所定のシメシロを介して圧入された芯金２６と、この芯金２６に一体に接合されたシール部材２９とからなる一体型のシールで構成されている。   The seal 28 is an integral seal comprising a cored bar 26 press-fitted into the outer periphery of the outer side end of the outer member 5 via a predetermined shimiro, and a seal member 29 integrally joined to the cored bar 26. It consists of

シール部材２９はＮＢＲ等の合成ゴムからなり、加硫接着によって芯金２６の内径部２１ｃからテーパ部２６ａに亙って接合され、このテーパ部２６ａに接合された外径部２７ａと、径方向外方に傾斜して延びるサイドリップ１１ａと、このサイドリップ１１ａの内径側に、径方向外方に湾曲して延びるサイドリップ２９ａと、これらサイドリップ１１ａ、２９ａの内径側に二股状に形成されたダストリップ２７ｂとグリースリップ２７ｃとを一体に有している。   The seal member 29 is made of a synthetic rubber such as NBR, and is joined to the taper portion 26a from the inner diameter portion 21c of the core metal 26 by vulcanization adhesion, and an outer diameter portion 27a joined to the taper portion 26a and a radial direction. A side lip 11a extending inclined outward, an inner diameter side of the side lip 11a, a side lip 29a extending curved outward in the radial direction, and an inner diameter side of the side lips 11a, 29a are formed in a bifurcated shape. The dust strip 27b and the grease lip 27c are integrally provided.

ここで、一対のサイドリップ１１ａ、２９ａが、車輪取付フランジ６の側面６ｃに対して、所定の軸方向シメシロをもって摺接されると共に、ダストリップ２７ｂとグリースリップ２７ｃが、断面が円弧状の曲面に形成された車輪取付フランジ６のインナー側の基部６ｂに対して、所定の径方向シメシロをもって摺接されている。   Here, the pair of side lips 11a and 29a are slidably contacted with the side surface 6c of the wheel mounting flange 6 with a predetermined axial squeeze, and the dust lip 27b and the grease lip 27c are curved surfaces having an arcuate cross section. The base portion 6b on the inner side of the wheel mounting flange 6 is formed in sliding contact with a predetermined radial direction.

ここでは、一対のサイドリップ１１ａ、２９ａのうち、内径側のサイドリップ２９ａが径方向外方に湾曲して形成され、その軸方向シメシロが外径側のサイドリップ１１ａより小さく設定されている。これにより、シール２８の耐泥水性を確保しつつ低トルク化を図ることができる。   Here, of the pair of side lips 11a, 29a, the inner side side lip 29a is curved outward in the radial direction, and the axial squeeze is set smaller than the outer side lip 11a. Thereby, low torque can be achieved while ensuring the mud water resistance of the seal 28.

図９に示すシール部は、図５のシール部の変形例である。なお、このシール部は、基本的には前述したシール２２が金属環３０に摺接されている点が異なるだけで、その他同一部品同一部位あるいは同一機能を有する部品や部位には同じ符号を付して詳細な説明を省略する。   The seal part shown in FIG. 9 is a modification of the seal part of FIG. Note that this seal portion basically differs only in that the above-described seal 22 is slidably contacted with the metal ring 30, and the same reference numerals are assigned to the same parts or parts having the same function. Therefore, detailed description is omitted.

金属環３０は、オーステナイト系ステンレス鋼鈑（ＪＩＳ規格のＳＵＳ３０４系）や冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系）等、防錆能を有する鋼鈑からプレス加工にて形成され、車輪取付フランジ６のインナー側の基部６ｂに嵌着され、シール２０が摺接されている。すなわち、径方向外方に傾斜して延びる一対のサイドリップ１１ａ、１１ｂとダストリップ１１ｃが、この金属環３０に対して所定の軸方向シメシロを介して摺接されると共に、軸受内方側に傾斜して延びるグリースリップ１１ｃが所定の径方向シメシロを介して摺接されている。   The metal ring 30 is formed by pressing a rust-proof steel plate such as an austenitic stainless steel plate (JIS standard SUS304) or a cold-rolled steel plate (JIS standard SPCC system), and has a wheel mounting flange. 6, the seal 20 is slidably contacted with the base 6b on the inner side. That is, a pair of side lips 11a, 11b and a dust lip 11c extending obliquely outward in the radial direction are slidably contacted with the metal ring 30 via a predetermined axial shimiro, and on the inner side of the bearing. A grease lip 11c extending in an inclined manner is slidably contacted via a predetermined radial squeezing.

金属環３０は、ハブ輪１の肩部に外嵌される円筒状の嵌合部３０ａと、円弧状に形成された基部６ｂに対応して円弧状に形成された湾曲部３０ｂと、この湾曲部３０ｂから径方向外方に延び、車輪取付フランジ６のインナー側の側面６ｃに密着される円板部３０ｃと、この円板部３０ｃの外径部から車輪取付フランジ６に対して軸方向に離間して延びる円筒状の傘部３０ｄと、この傘部３０ｄから径方向外方に突出して形成された折曲部３０ｅとを備えている。この折曲部３０ｅは、金属環３０の剛性を向上させるために設けられたもので、金属環３０の寸法・形状精度を高めることができると共に、走行中に飛石等の異物がこの金属環３０に衝突しても変形するのを防止することができる。   The metal ring 30 includes a cylindrical fitting portion 30a fitted on the shoulder portion of the hub wheel 1, a curved portion 30b formed in an arc shape corresponding to the base portion 6b formed in an arc shape, and the curved shape. A disk part 30c that extends radially outward from the part 30b and is in close contact with the inner side surface 6c of the wheel mounting flange 6, and an axial direction from the outer diameter part of the disk part 30c to the wheel mounting flange 6 A cylindrical umbrella portion 30d extending at a distance is provided, and a bent portion 30e formed to protrude radially outward from the umbrella portion 30d. The bent portion 30e is provided in order to improve the rigidity of the metal ring 30, and can improve the dimensional and shape accuracy of the metal ring 30, and foreign matters such as stepping stones can travel during the traveling. It can be prevented from being deformed even when it collides.

なお、この金属環３０は、素材となる鋼板の表面粗さがＲａ０．２〜０．６の範囲に設定されている。これにより、良好なシール摺接面を得ることができ、リップ摩耗を抑制すると共に、劣悪な環境で使用されても、シール２０の密封性能の維持を図ることができる。なお、Ｒａは、ＪＩＳの粗さ形状パラメータの一つで（ＪＩＳ Ｂ０６０１−１９９４）、算術平均粗さのことで、平均線から絶対値偏差の平均値を言う。   In addition, as for this metal ring 30, the surface roughness of the steel plate used as a raw material is set to the range of Ra0.2-0.6. Thereby, a favorable seal sliding contact surface can be obtained, lip wear can be suppressed, and the sealing performance of the seal 20 can be maintained even when used in a poor environment. Note that Ra is one of JIS roughness shape parameters (JIS B0601-1994), and is an arithmetic average roughness, which means an average value of absolute value deviations from an average line.

ここで、車輪取付フランジ６のインナー側の基部６ｂは、ハブ輪１の肩部と車輪取付フランジ６との間の角部に所定の曲率半径ｒからなる円弧面に形成されている。そして、この円弧面に対応して、金属環３０の湾曲部３０ｂは所定の曲率半径Ｒからなる円弧面からなり、それぞれの曲率半径Ｒ、ｒがＲ≧ｒになるように設定されている。これにより、金属環３０を基部６ｂに嵌合した時に基部６ｂの円弧面に金属環３０の湾曲部３０ｂが干渉して浮き上がるのを防止している。したがって、車輪取付フランジ６の側面６ｃと金属環３０の円板部３０ｃとの間にすきまが生じるのが防止されて両者が密着し、サイドリップ１１ａ、１１ｂおよびダストリップ１１ｃのシメシロのバラツキを抑えて安定した密封性を確保することができる。   Here, the base 6 b on the inner side of the wheel mounting flange 6 is formed in an arc surface having a predetermined radius of curvature r at a corner between the shoulder of the hub wheel 1 and the wheel mounting flange 6. Corresponding to this arc surface, the curved portion 30b of the metal ring 30 is formed of an arc surface having a predetermined radius of curvature R, and the respective curvature radii R and r are set such that R ≧ r. Thus, when the metal ring 30 is fitted to the base portion 6b, the curved portion 30b of the metal ring 30 is prevented from interfering with the arc surface of the base portion 6b and rising. Therefore, a gap is prevented from being generated between the side surface 6c of the wheel mounting flange 6 and the disk portion 30c of the metal ring 30, and the both are brought into close contact with each other, thereby suppressing variation in the side lips 11a, 11b and the dust lip 11c. And stable sealing performance can be secured.

また、金属環３０の傘部３０ｄから折曲部３０ｅに亙って弾性リップ３１が加硫接着によって一体に接合され、車輪取付フランジ６の側面６ｃに弾性接触している。これにより、車輪取付フランジ６の側面６ｃと金属環３０の円板部３０ｃとの間から異物が浸入するのを防止して基部６ｂおよび金属環３０の装着部の発錆を長期間に亘って防止することができる。   Further, the elastic lip 31 is integrally joined by vulcanization bonding from the umbrella portion 30d of the metal ring 30 to the bent portion 30e, and is in elastic contact with the side surface 6c of the wheel mounting flange 6. This prevents foreign matter from entering from between the side surface 6c of the wheel mounting flange 6 and the disc portion 30c of the metal ring 30, and rusting of the mounting portion of the base 6b and the metal ring 30 is performed over a long period of time. Can be prevented.

本実施形態では、金属環３０の傘部３０ｄは、外方部材５のアウター側の端部外周に沿って僅かな環状のすきまＢを介して対向配置され、ラビリンスシールが構成されている。この環状のすきまＢは０．０５〜１．０ｍｍ（直径）の範囲に設定されている。なお、すきまＢが０．０５ｍｍ未満となると金属環３０や外方部材５の寸法バラツキや偏心等により、傘部３０ｄが外方部材５に干渉する恐れがあると共に、１．０ｍｍを超えると泥水等が浸入し易くなるので好ましくない。   In the present embodiment, the umbrella portion 30d of the metal ring 30 is disposed so as to face the outer periphery of the outer member 5 via a slight annular gap B along the outer periphery of the outer portion, thereby forming a labyrinth seal. The annular clearance B is set in a range of 0.05 to 1.0 mm (diameter). If the clearance B is less than 0.05 mm, the umbrella 30d may interfere with the outer member 5 due to dimensional variation or eccentricity of the metal ring 30 or the outer member 5, and if it exceeds 1.0 mm, muddy water Etc. is not preferable because it easily enters.

このように、傘部３０ｄの内周面と外方部材５の外周面とによって形成されたラビリンス効果により、シール２０と金属環３０との摺接部に泥水等が浸入するのを防止することができると共に、この僅かな環状の隙間Ｂから金属環３０の内部に泥水等が浸入したとしても、図中破線矢印にて示すように、金属環３０の回転に伴う遠心力によって排出され、サイドリップ１１ａ上に滞留することはない。したがって、泥水等がサイドリップ１１ａの摺接面に付着して摩耗するのを防止し、長期間に亘って安定した密封性を保持することができる。   As described above, the labyrinth effect formed by the inner peripheral surface of the umbrella portion 30d and the outer peripheral surface of the outer member 5 prevents muddy water or the like from entering the sliding contact portion between the seal 20 and the metal ring 30. Even if muddy water or the like enters the inside of the metal ring 30 from the slight annular gap B, it is discharged by the centrifugal force accompanying the rotation of the metal ring 30 as shown by the broken line arrow in the figure. It does not stay on the lip 11a. Therefore, muddy water or the like can be prevented from adhering to the sliding contact surface of the side lip 11a and worn, and a stable sealing performance can be maintained over a long period of time.

図１０は、本発明に係る車輪用軸受装置の第２の実施形態を示す縦断面図、図１１は、図１０のインナー側のシール部を示す要部拡大図である。   FIG. 10 is a longitudinal sectional view showing a second embodiment of the wheel bearing device according to the present invention, and FIG. 11 is an enlarged view of a main part showing a seal part on the inner side of FIG.

この車輪用軸受装置は従動輪用の第２世代と称され、ハブ輪（外方部材）３２と、このハブ輪３２に複列の転動体４、４を介して内挿された一対の内輪２、２とを備えている。一対の内輪２、２は、アクスル３３に所定のシメシロを介して圧入されている。このアクスル３３は、肩部３４から軸方向に延びる軸部３５が一体に形成され、この軸部３５に一対の内輪２、２が圧入されている。そして、肩部３４にインナー側の内輪２が当接されると共に、軸部３５の端部に形成されたねじ部３６にナット３７が緊締され、一対の内輪２、２が肩部３５とナット３７とで挟持された状態で軸方向に固定されている。   This wheel bearing device is called a second generation for driven wheels, and includes a hub ring (outer member) 32 and a pair of inner rings inserted into the hub ring 32 via double-row rolling elements 4 and 4. 2 and 2. The pair of inner rings 2, 2 are press-fitted into the axle 33 via a predetermined scissors. The axle 33 is integrally formed with a shaft portion 35 extending in the axial direction from the shoulder portion 34, and the pair of inner rings 2 and 2 are press-fitted into the shaft portion 35. The inner ring 2 on the inner side is brought into contact with the shoulder 34, and a nut 37 is fastened to a threaded portion 36 formed at the end of the shaft 35, so that the pair of inner rings 2, 2 are connected to the shoulder 35 and the nut. 37 and is fixed in the axial direction in a state of being sandwiched between the two.

ハブ輪３２はＳ５３Ｃ等の炭素０．４０〜０．８０ｗｔ％を含む中高炭素鋼で形成され、アウター側の端部に車輪（図示せず）を取り付けるための車輪取付フランジ６を一体に有し、内周に複列の外側転走面３２ａ、３２ａが形成されている。そして、複列の外側転走面３２ａ、３２ａが高周波焼入れによって５８〜６４ＨＲＣの範囲に表面が硬化処理されている。また、ハブ輪３２と一対の内輪２、２との間に形成される環状空間の両端開口部にシールド３８とシール３９が装着され、軸受内部に封入された潤滑グリースの外部への漏洩と、外部から雨水やダスト等が軸受内部に浸入するのを防止している。   The hub wheel 32 is formed of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and integrally has a wheel mounting flange 6 for mounting a wheel (not shown) on the outer end. , Double row outer rolling surfaces 32a, 32a are formed on the inner periphery. And the surface is hardened in the range of 58-64HRC by the induction hardening of the double row outer side rolling surfaces 32a and 32a. In addition, a shield 38 and a seal 39 are attached to both ends of an annular space formed between the hub wheel 32 and the pair of inner rings 2 and 2, and leakage of lubricating grease sealed inside the bearing Prevents rainwater and dust from entering the bearing from the outside.

シール３９は、図１１に拡大して示すように、ハブ輪３２のインナー側端部の内周に所定のシメシロを介して圧入された芯金１０と、この芯金１０に接合されたシール部材４０とからなる一体型のシールで構成されている。   As shown in an enlarged view in FIG. 11, the seal 39 includes a metal core 10 that is press-fitted into the inner periphery of the inner side end of the hub wheel 32 via a predetermined shimoshiro, and a seal member that is joined to the metal core 10. 40 and an integrated seal.

シール部材４０はＮＢＲ等の合成ゴムからなり、加硫接着によって芯金１０に一体に接合されている。このシール部材４０は、径方向外方に傾斜して延びる一対のサイドリップ１１ａ、１１ｂと、これらサイドリップ１１ａ、１１ｂの内径側に、二股状に延びるダストリップ４０ａとグリースリップ４０ｂを一体に有している。   The seal member 40 is made of synthetic rubber such as NBR and is integrally joined to the core metal 10 by vulcanization adhesion. The seal member 40 has a pair of side lips 11a and 11b extending obliquely outward in the radial direction, and a duster lip 40a and a grease lip 40b extending in a bifurcated manner on the inner diameter side of the side lips 11a and 11b. is doing.

そして、一対のサイドリップ１１ａ、１１ｂは、アクスル３３の肩部３４に所定の軸方向シメシロを介して摺接されると共に、ダストリップ４０ａとグリースリップ４０ｂが、内輪２の外径に所定の径方向シメシロを介して摺接されている。これにより、シール３９の耐泥水性を向上させると共に、シメシロのバラツキを容易に抑えることができ、安定した密封性と低トルク化を図ることができる。そして、軸受内部に充填されたグリースの流出を防止することができ、軸受の長寿命化を図った車輪用軸受装置を提供することができる。   The pair of side lips 11a and 11b are slidably contacted with the shoulder portion 34 of the axle 33 via a predetermined axial squeeze, and the dust lip 40a and the grease lip 40b have a predetermined diameter on the outer diameter of the inner ring 2. It is slidably contacted through a direction shimoshiro. As a result, the mud water resistance of the seal 39 can be improved, and the variation of the shimoshiro can be easily suppressed, so that stable sealing performance and torque reduction can be achieved. Further, it is possible to prevent the grease filled in the bearing from flowing out, and to provide a wheel bearing device that extends the life of the bearing.

以上、本発明の実施の形態について説明を行ったが、本発明はこうした実施の形態に何等限定されるものではなく、あくまで例示であって、本発明の要旨を逸脱しない範囲内において、さらに種々なる形態で実施し得ることは勿論のことであり、本発明の範囲は、特許請求の範囲の記載によって示され、さらに特許請求の範囲に記載の均等の意味、および範囲内のすべての変更を含む。   The embodiment of the present invention has been described above, but the present invention is not limited to such an embodiment, and is merely an example. Of course, the scope of the present invention is indicated by the description of the scope of claims, and further, the equivalent meanings described in the scope of claims and all modifications within the scope of the scope of the present invention are included. Including.

本発明に係る車輪用軸受シールは、回転側部材となる内方部材と、固定側部材となる外方部材との間に形成される環状空間の開口部に装着され、複数のサイドリップを備えた車輪用軸受シール適用できる。   The wheel bearing seal according to the present invention is attached to an opening of an annular space formed between an inner member serving as a rotating member and an outer member serving as a stationary member, and includes a plurality of side lips. Applicable to wheel bearing seals.

１、３２ ハブ輪
１ａ、２ａ 内側転走面
１ｂ 小径段部
１ｃ セレーション
２ 内輪
３ 内方部材
４ 転動体
５ 外方部材
５ａ、３２ａ 外側転走面
５ｂ 車体取付フランジ
６ 車輪取付フランジ
６ａ ハブボルト
６ｂ 車輪取付フランジのインナー側の基部
６ｃ 車輪取付フランジのインナー側の側面
７ 保持器
８、１８、２０、２５、２８ アウター側のシール
９、３９ インナー側のシール
１０、１４、２１、２６ 芯金
１０ａ、１４ａ、２１ａ 嵌合部
１０ｂ、１４ｂ、２１ｃ 内径部
１１、１５、１９、２２、２７、２９、４０ シール部材
１１ａ、１１ｂ、１５ａ、１５ｂ、２９ａ サイドリップ
１１ｃ、１５ｃ、２７ｂ、４０ａ ダストリップ
１１ｄ、１９ａ、１５ｄ、２７ｃ、４０ｂ グリースリップ
１２ シール板
１３ スリンガ
１３ａ 円筒部
１３ｂ 立板部
１６ 磁気エンコーダ
１７ ラビリンスシール
２１ｂ 縮径部
２３、２３’ フラット部
２４ 凸部
２６ａ テーパ部
２７ａ 外径部
３０ 金属環
３１ 弾性リップ
３３ アクスル
３４ 肩部
３５ 軸部
３６ ねじ部
３７ ナット
３８ シールド
５０ シール
５１ 外輪
５２ ハブ輪
５３ 内部空間
５４ サイドリップ
５５ ダストリップ
５６ グリースリップ
５７ 車輪取付フランジ
５８ 曲面部
Ａ フラット部の外径と外径側のサイドリップの外径との段差
Ｂ ラビリンスシールの環状のすきま DESCRIPTION OF SYMBOLS 1, 32 Hub wheel 1a, 2a Inner rolling surface 1b Small diameter step part 1c Serration 2 Inner ring 3 Inner member 4 Rolling body 5 Outer member 5a, 32a Outer rolling surface 5b Car body mounting flange 6 Wheel mounting flange 6a Hub bolt 6b Wheel Inner side base 6c of the mounting flange Side surface 7 on the inner side of the wheel mounting flange Cage 8, 18, 20, 25, 28 Outer side seal 9, 39 Inner side seal 10, 14, 21, 26 Core metal 10a, 14a, 21a Fitting portion 10b, 14b, 21c Inner diameter portion 11, 15, 19, 22, 27, 29, 40 Seal member 11a, 11b, 15a, 15b, 29a Side lip 11c, 15c, 27b, 40a Dustrip 11d, 19a, 15d, 27c, 40b Grease lip 12 Seal plate 13 Slinger 13a Cylindrical portion 13b Standing plate portion 16 Magnetic encoder 17 Labyrinth seal 21b Reduced diameter part 23, 23 'Flat part 24 Convex part 26a Taper part 27a Outer diameter part 30 Metal ring 31 Elastic lip 33 Axle 34 Shoulder part 35 Shaft part 36 Screw part 37 Nut 38 Shield 50 Seal 51 Outer ring 52 Hub ring 53 Internal space 54 Side lip 55 Dustrip 56 Grease lip 57 Wheel mounting flange 58 Curved surface part A Step between the outer diameter of the flat part and the outer diameter of the side lip on the outer diameter side Annular clearance of the labyrinth seal

Claims (13)

外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に延びる内径部を有する芯金、およびこの芯金の内径部に加硫接着により一体に接合され、径方向外方に傾斜して延びて垂直な相手部材の側面に所定の軸方向シメシロを介して摺接する一対のサイドリップと、このサイドリップの内径側に、軸受内方側に傾斜して延びるグリースリップを一体に有するシール部材を備え、前記サイドリップとグリースリップとの間にダストリップが形成されていることを特徴とする車輪用軸受シール。   A cylindrical fitting portion that is press-fitted into the inner periphery of the end of the outer member, a metal core having an inner diameter portion extending radially inward from the fitting portion, and an inner diameter portion of the metal core are integrated by vulcanization adhesion A pair of side lips that extend in a radially outwardly inclined manner and are in sliding contact with a side surface of a vertical mating member via a predetermined axial shimiro, on the inner diameter side of the side lip, on the inner side of the bearing A wheel bearing seal, comprising: a seal member integrally including an inclined and extending grease lip, wherein a dust lip is formed between the side lip and the grease lip. 外周に懸架装置を構成するナックルに取り付けられるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に前記複列の外側転走面の一方に対向する内側転走面と、この内側転走面から軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に嵌合され、前記複列の外側転走面の他方に対向する内側転走面が形成された内輪または等速自在継手の外側継手部材からなる内方部材と、この内方部材と前記外方部材の両転走面間に転動自在に収容された複列の転動体と、前記外方部材と内方部材との間に形成される環状空間の両端開口部に装着されたシールとを備えた車輪用軸受装置において、前記シールのうちアウター側のシールが、前記外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に延びる内径部を有する芯金、およびこの芯金の内径部に加硫接着により一体に接合され、径方向外方に傾斜して延びる一対のサイドリップと、このサイドリップの内径側に、径方向外方に傾斜して延びるダストリップ、および軸受内方側に傾斜して延びるグリースリップを一体に有するシール部材からなり、前記一対のサイドリップが、前記車輪取付フランジのインナー側の側面に所定の軸方向シメシロを介して摺接されると共に、前記車輪取付フランジのインナー側の基部が断面円弧状の曲面に形成され、この基部に前記ダストリップが所定の軸方向シメシロをもって摺接されていることを特徴とする車輪用軸受装置。   An outer member that integrally has a vehicle body mounting flange to be attached to a knuckle constituting a suspension device on the outer periphery, and an outer member in which a double row outer rolling surface is integrally formed on the inner periphery, and a wheel on one end A hub wheel integrally having a wheel mounting flange and having an inner rolling surface opposed to one of the double-row outer rolling surfaces and a small-diameter step portion extending in the axial direction from the inner rolling surface. And an inner member comprising an outer joint member of an inner ring or a constant velocity universal joint that is fitted to a small-diameter step portion of the hub wheel and has an inner rolling surface facing the other of the outer rolling surfaces of the double row. A double row rolling element that is slidably accommodated between both rolling surfaces of the inner member and the outer member, and an annular space formed between the outer member and the inner member. In a wheel bearing device provided with seals attached to openings at both ends, The outer side seal has a cylindrical fitting portion press-fitted into the inner periphery of the end portion of the outer member, a cored bar having an inner diameter extending radially inward from the fitted part, and an inner diameter of the cored bar A pair of side lips that are integrally joined to each other by vulcanization and that extend obliquely outward in the radial direction, a dust lip that extends radially inwardly on the inner diameter side of the side lip, and an inner bearing A pair of side lips that are in sliding contact with the side surface on the inner side of the wheel mounting flange via a predetermined axial nip, and the wheel. A wheel bearing device, wherein a base portion on the inner side of the mounting flange is formed in a curved surface having an arcuate cross section, and the dust lip is slidably contacted with the base portion with a predetermined axial direction. 前記グリースリップが前記基部に対して所定の径方向シメシロを介して摺接されている請求項２に記載の車輪用軸受装置。   The wheel bearing device according to claim 2, wherein the grease lip is slidably contacted with the base portion through a predetermined radial shimiro. 前記グリースリップが前記基部に対して僅かな径方向すきまを介して対峙し、ラビリンスシールが構成されている請求項２に記載の車輪用軸受装置。   The wheel bearing device according to claim 2, wherein the grease lip is opposed to the base portion through a slight radial clearance to form a labyrinth seal. 前記芯金が、前記嵌合部と内径部との間に縮径部を備え、前記シール部材が前記芯金の内径部から縮径部に亙って接合され、この縮径部に接合された外径部に、そのアウター側の端部にフラット部と、径方向外方に突出する凸部が形成されると共に、この凸部の外径が、前記芯金の嵌合部の外径よりも僅かに大径に形成され、前記外方部材の端部内周に弾性変形させて圧入されている請求項２に記載の車輪用軸受装置。   The core bar includes a reduced diameter portion between the fitting portion and the inner diameter portion, and the seal member is joined from the inner diameter portion to the reduced diameter portion of the core metal, and is joined to the reduced diameter portion. In the outer diameter portion, a flat portion and a convex portion projecting radially outward are formed at the outer end, and the outer diameter of the convex portion is the outer diameter of the fitting portion of the cored bar. The wheel bearing device according to claim 2, wherein the wheel bearing device is formed to have a slightly larger diameter than the outer member and is elastically deformed and press-fitted into an inner periphery of the end portion of the outer member. 前記フラット部の外径と前記外径側のサイドリップの外径との段差が１．０ｍｍ以上に設定されている請求項５に記載の車輪用軸受装置。   The wheel bearing device according to claim 5, wherein a step between the outer diameter of the flat portion and the outer diameter of the side lip on the outer diameter side is set to 1.0 mm or more. 前記車輪取付フランジのインナー側の基部に金属環が嵌着され、この金属環が、前記ハブ輪の肩部に外嵌される円筒状の嵌合部と、前記基部に対応して円弧状に形成された湾曲部と、この湾曲部から径方向外方に延び、前記車輪取付フランジのインナー側の側面に密着される円板部と、この円板部の外径部から前記車輪取付フランジに対して軸方向に離間して延びる円筒状の傘部とを備え、この傘部が前記外方部材のアウター側の端部外周に沿って僅かな環状のすきまを介して対向配置され、ラビリンスシールが構成されると共に、前記一対のサイドリップが前記円板部に所定の軸方向シメシロを介して摺接されると共に、前記ダストリップが前記湾曲部に所定の軸方向シメシロを介して摺接され、前記グリースリップが前記嵌合部に所定の径方向シメシロを介して摺接されている請求項２に記載の車輪用軸受装置。   A metal ring is fitted to the base portion on the inner side of the wheel mounting flange, and the metal ring is formed in a circular arc shape corresponding to the base portion and a cylindrical fitting portion that is fitted on the shoulder portion of the hub wheel. A formed curved portion, a disk portion extending radially outward from the curved portion and being in close contact with an inner side surface of the wheel mounting flange, and an outer diameter portion of the disk portion to the wheel mounting flange. A cylindrical umbrella portion extending apart in the axial direction, and the umbrella portion is disposed so as to face the outer periphery of the outer member on the outer side through a slight annular gap. And the pair of side lips are slidably contacted with the disc portion via a predetermined axial squeeze, and the dust lip is slidably contacted with the curved portion via a predetermined axial shimeros. The grease lip is fixed to the fitting portion. A bearing device for a wheel according to claim 2 which is in sliding contact through the direction Interference. 前記金属環の湾曲部が所定の曲率半径Ｒで形成されると共に、前記基部が所定の曲率半径ｒからなる円弧面に形成され、この円弧面に対応して、それぞれの曲率半径Ｒ、ｒがＲ≧ｒになるように設定されている請求項７に記載の車輪用軸受装置。   The curved portion of the metal ring is formed with a predetermined radius of curvature R, and the base is formed on an arc surface having a predetermined radius of curvature r, and the respective curvature radii R and r correspond to the arc surface. The wheel bearing device according to claim 7, wherein R ≧ r is set. 前記金属環が前記傘部から径方向外方に突出して形成された折曲部を備えている請求項７または８に記載の車輪用軸受装置。   The wheel bearing device according to claim 7 or 8, wherein the metal ring includes a bent portion formed to protrude radially outward from the umbrella portion. 前記金属環の素材となる鋼板の表面粗さがＲａ０．２〜０．６の範囲に設定されている請求項７乃至９いずれかに記載の車輪用軸受装置。   The wheel bearing device according to any one of claims 7 to 9, wherein a surface roughness of a steel plate as a material of the metal ring is set in a range of Ra 0.2 to 0.6. 前記金属環の傘部に弾性リップが加硫接着によって一体に接合され、前記車輪取付フランジの側面に弾性接触されている請求項７乃至１０いずれかに記載の車輪用軸受装置。   The wheel bearing device according to any one of claims 7 to 10, wherein an elastic lip is integrally joined to the umbrella portion of the metal ring by vulcanization adhesion and elastically contacted with a side surface of the wheel mounting flange. 前記シールのうちインナー側のシールが、互いに対向配置され、前記外方部材の端部内周に所定のシメシロを介して圧入された環状のシール板と、前記内輪または外側継手部材の外径に所定のシメシロを介して圧入されたスリンガとからなるパックシールで構成され、前記シール板が、前記外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に屈曲して延びる内径部を備えた芯金、およびこの芯金の内径部に加硫接着により一体に接合され、径方向外方に傾斜して延びる一対のサイドリップと、これらサイドリップの内径側に二股状に延びるダストリップとグリースリップを一体に有するシール部材を備えると共に、前記スリンガが、前記内輪または外側継手部材の外径に圧入される円筒部と、この円筒部から径方向外方に延びる立板部とを備え、前記一対のサイドリップが、前記スリンガの立板部に所定の軸方向シメシロをもって摺接されると共に、前記ダストリップとグリースリップが前記スリンガの円筒部に所定の径方向シメシロを介して摺接され、前記立板部の外縁が前記シール板に対して僅かな径方向すきまを介して対峙し、ラビリンスシールが構成されている請求項２に記載の車輪用軸受装置。   The seals on the inner side of the seals are arranged to face each other, and have an annular seal plate that is press-fitted to the inner periphery of the end portion of the outer member through a predetermined shimoshiro and a predetermined diameter on the outer diameter of the inner ring or outer joint member A cylindrical seal part that is press-fitted into the inner periphery of the end of the outer member, and a radial direction from the fit part. A cored bar having an inner diameter part that bends and extends inward, a pair of side lips that are integrally joined to the inner diameter part of the cored bar by vulcanization and extend obliquely outward in the radial direction, and these side lips A cylindrical member into which the slinger is press-fitted into the outer diameter of the inner ring or outer joint member, and a diameter from the cylindrical portion. And the pair of side lips are slidably in contact with the standing plate portion of the slinger with a predetermined axial direction, and the dust lip and the grease lip are the cylindrical portion of the slinger. The labyrinth seal according to claim 2, wherein an outer edge of the upright plate portion is opposed to the seal plate via a slight radial clearance to form a labyrinth seal. Wheel bearing device. アウター側の端部に車輪を取り付けるための車輪取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、この外方部材に複列の転動体を介して内挿され、アクスルの肩部から軸方向に延びる軸部に所定のシメシロを介して圧入された一対の内輪と、これら内輪と前記外方部材との間に形成される環状空間の両端開口部に装着されたシールとを備えた車輪用軸受装置において、前記軸部の端部に形成されたねじ部にナットが緊締され、前記一対の内輪が前記アクスルの肩部とナットとで挟持された状態で軸方向に固定され、前記シールのうちインナー側のシールが、前記外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に屈曲して延びる内径部を備えた芯金、およびこの芯金の内径部に加硫接着により一体に接合され、径方向外方に傾斜して延びる一対のサイドリップと、これらサイドリップの内径側に二股状に延びるダストリップとグリースリップを一体に有するシール部材を備え、前記一対のサイドリップが、前記アクスルの肩部に所定の軸方向シメシロを介して摺接されると共に、前記ダストリップとグリースリップが、前記内輪の外径に所定の径方向シメシロを介して摺接されていることを特徴とする車輪用軸受装置。   An outer member that integrally has a wheel mounting flange for attaching a wheel to an end portion on the outer side, a double row outer rolling surface is integrally formed on the inner periphery, and a double row rolling member on the outer member. A pair of inner rings inserted through a moving body and press-fitted into a shaft portion extending in the axial direction from the shoulder portion of the axle via a predetermined shimiro, and an annular space formed between the inner ring and the outer member In the wheel bearing device including the seals attached to the opening portions at both ends, a nut is fastened to a screw portion formed at the end portion of the shaft portion, and the pair of inner rings are connected to the shoulder portion of the axle and the nut. The inner seal of the seals is fixed in the axial direction, and the inner seal is press-fitted into the inner periphery of the end of the outer member. Cored bar with an inner diameter bent and extending toward the end, and the inner diameter of the cored bar A pair of side lips that are integrally joined to each other by vulcanization adhesion, and that extend obliquely outward in the radial direction, and a sealing member that integrally includes a duster lip and a grease lip that extend bifurcated on the inner diameter side of these side lips, The pair of side lips are slidably brought into contact with the shoulder portion of the axle via a predetermined axial nip, and the dust lip and the grease lip are slid onto the outer diameter of the inner ring via the predetermined radial nip. A wheel bearing device characterized by being in contact with each other.
JP2009242264A 2009-10-21 2009-10-21 Bearing seal for wheels and bearing device for wheels equipped with the same Pending JP2011088513A (en)

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JP2013242037A (en) * 2012-04-25 2013-12-05 Nsk Ltd Wheel supporting rolling bearing unit
JP2015108415A (en) * 2013-12-05 2015-06-11 日本精工株式会社 Seal member and rolling bearing unit
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JP2013242037A (en) * 2012-04-25 2013-12-05 Nsk Ltd Wheel supporting rolling bearing unit
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CN106969865A (en) * 2017-02-22 2017-07-21 浙江万向精工有限公司 A kind of sealing ring lateral lip device for pressure measurement and measuring method
CN111516860A (en) * 2020-04-30 2020-08-11 中国直升机设计研究所 Helicopter flight control system transmission mechanism with waterproof sealing function

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