JP2008190615A - Wheel bearing device - Google Patents

Wheel bearing device Download PDF

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Publication number
JP2008190615A
JP2008190615A JP2007025377A JP2007025377A JP2008190615A JP 2008190615 A JP2008190615 A JP 2008190615A JP 2007025377 A JP2007025377 A JP 2007025377A JP 2007025377 A JP2007025377 A JP 2007025377A JP 2008190615 A JP2008190615 A JP 2008190615A
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Japan
Prior art keywords
inner ring
lip
inner member
outer periphery
contact surface
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Pending
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JP2007025377A
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Japanese (ja)
Inventor
Naoshi Hattori
直志 服部
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2007025377A priority Critical patent/JP2008190615A/en
Publication of JP2008190615A publication Critical patent/JP2008190615A/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
    • 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
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft

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

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a lip of a seal member from being damaged due to the deposition of slurry and dust and dirt without increasing the number of parts and man-hours in a wheel bearing device in which the lip of the seal member for controlling the intrusion of water through the gap between itself and a mounting flange for an outer member and an inner member is in slidable contact with the inner ring outer periphery of the inner member. <P>SOLUTION: The height r1 of the inner ring abutting surface 11d of an inner member body 11 is formed lower than the height r2 of the lip slidable contact surface 12a of an inner ring 12. Therefore, a slurry W easily falls before it reaches the lip slidable contact surface 12a by a step (r2-r1) between both surfaces 11d, 12a. Also, the slurry W adhered to the lip slidable contact surface 12a when the device is stopped is easily discharged since the step (r2-r1) between the both surfaces 11d, 12a forms a head. Dust and dirt are also dredged by the flow. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、自動車の車輪軸受装置に関するものである。   The present invention relates to an automobile wheel bearing device.

自動車の車輪軸受装置には、駆動輪用のものと、非駆動輪用のものとがあり、それぞれ種々の型式のものがある。その基本構造は、外周に複列の軌道面を有する内方部材と、その各々の軌道面に対応する軌道面を有する外方部材と、前記内方部材と前記外方部材との間に介在する複列の転動体と、前記外方部材と前記内方部材との間を密封するシール部材とを備えたものである。   There are two types of wheel bearing devices for automobiles, one for driving wheels and the other for non-driving wheels. The basic structure includes an inner member having a double-row raceway surface on the outer periphery, an outer member having a raceway surface corresponding to each raceway surface, and the inner member and the outer member interposed therebetween. A double row rolling element, and a seal member that seals between the outer member and the inner member.

上記外方部材としては、ナックル又は車輪の取付け用フランジを外周に設けた外方部材本体の内周に外輪を嵌合したもの、ナックル又は車輪の取付け用フランジを外周に設け、複列の軌道面を内周に形成した環状部材が広く利用されている。また、上記内方部材としては、車輪又はナックルの取付け用フランジを外周に設けた内方部材本体の小外径部に内輪を嵌合したものが広く利用されている。外方部材と内方部材のうち、車輪の取付け用フランジを設けたものが、回転側のハブ輪として構成される。   As the outer member, a knuckle or a wheel mounting flange is provided on the outer periphery of the outer member body, the outer ring is fitted on the inner periphery, a knuckle or wheel mounting flange is provided on the outer periphery, and a double row track. An annular member having a surface formed on the inner periphery is widely used. As the inner member, a member in which an inner ring is fitted to a small outer diameter portion of an inner member main body provided with a flange for attaching a wheel or a knuckle on the outer periphery is widely used. Of the outer member and the inner member, a member provided with a wheel mounting flange is configured as a rotating hub wheel.

上記のような従来例の要部縦断正面を図３に示す。図３の従来例の内方部材本体１００は、内輪１１０を圧入する嵌合面１０１と、内輪１１０の端面に接触する内輪突き合わせ面１０２と、この内輪突き合わせ面１０２に連続する取付け用フランジ１０３とを有する（特許文献１）。   FIG. 3 shows a longitudinal cross-sectional front view of the conventional example as described above. The inner member main body 100 of the conventional example of FIG. 3 includes a fitting surface 101 for press-fitting the inner ring 110, an inner ring butting surface 102 that contacts the end surface of the inner ring 110, and a mounting flange 103 that is continuous with the inner ring butting surface 102. (Patent Document 1).

なお、取付け用フランジ１０３は、車輪取付け用となっており、内方部材が回転側となっている。外方部材１２０は、ナックルの取付け用フランジが外周に形成された外方部材本体１２１の内周に外輪１２２が嵌合されたものが採用されている。内輪１１０の軌道面と外輪１２２の軌道面との間に複数の転動体１３０が保持器で周方向に等配されるように組み込まれて軸受が構成されている。   The mounting flange 103 is for wheel mounting, and the inner member is on the rotating side. As the outer member 120, a member in which an outer ring 122 is fitted to the inner periphery of an outer member main body 121 in which a flange for attaching a knuckle is formed on the outer periphery is adopted. A plurality of rolling elements 130 are incorporated between the raceway surface of the inner ring 110 and the raceway surface of the outer ring 122 so as to be equally distributed in the circumferential direction by a cage to constitute a bearing.

内方部材本体１００の取付け用フランジ１０３と外方部材１２０との間には、外部に通じる環状空間が生じる。この環状空間には、車輪からの泥はねによって泥水Ｗの飛沫や塵埃Ｃが入り易い。このため、外方部材１２０には、軸受内部を保護するためのシール部材１４０が取り付けられている。   An annular space communicating with the outside is formed between the mounting flange 103 of the inner member main body 100 and the outer member 120. Muddy water splashes and dust C easily enter the annular space due to mud splashing from the wheels. For this reason, a seal member 140 for protecting the inside of the bearing is attached to the outer member 120.

シール部材１４０のリップ１４１は、内輪１１０の外周に形成された円筒面１１１に摺接する。これにより、軸受内部への浸水を防御すると共に、軸受内部からのグリース漏れを防止することができる。   The lip 141 of the seal member 140 is in sliding contact with the cylindrical surface 111 formed on the outer periphery of the inner ring 110. Thereby, it is possible to prevent water from entering the bearing and to prevent grease leakage from the inside of the bearing.

特開２００５−１２１１２０号公報（図１、段落００１９）Japanese Patent Laying-Open No. 2005-121120 (FIG. 1, paragraph 0019)

しかしながら、図３に例示したように、内方部材本体１００は、内輪突き合わせ面１０２の高さｒ１が、全周に亘って内輪１１０のリップ摺接面１１１の高さｒ２より高くなっている。このため、停止時にリップ摺接面１１１付近に付着していた泥水Ｗや塵埃Ｃは、そのままリップ摺接面１１１上に残り易い。残った泥水Ｗや塵埃Ｃは、水気の蒸発で泥や塵埃Ｃがそのまま固まったり、漏洩グリースと混ざったりするため、徐々に堆積していく。シール部材１４０のリップ１４１が堆積物を巻き込むと、リップ１４１が傷み、シール性能の低下を招く。また、泥水Ｗと塵埃Ｃはリップ摺接部１１１付近に残ることで、リップ摺接面に微小に入り込み、やすりがけのような効果を生み、リップ１４１の摩耗を促進させることが考えられる。   However, as illustrated in FIG. 3, in the inner member main body 100, the height r1 of the inner ring butting surface 102 is higher than the height r2 of the lip sliding contact surface 111 of the inner ring 110 over the entire circumference. For this reason, the muddy water W and the dust C adhering to the vicinity of the lip sliding contact surface 111 at the time of stopping tend to remain on the lip sliding contact surface 111 as they are. The remaining muddy water W and dust C are gradually accumulated because the mud and dust C are solidified as they are evaporated or mixed with leaking grease. When the lip 141 of the sealing member 140 entrains the deposit, the lip 141 is damaged and the sealing performance is deteriorated. Further, it is conceivable that the muddy water W and the dust C remain in the vicinity of the lip sliding contact portion 111 so as to enter the lip sliding contact surface minutely and produce an effect such as fraying and promote wear of the lip 141.

内輪にスリンガを取り付け、そのスリンガにリップが摺接するように構成すれば、上記の問題は回避できるが、組立て部品の増大を招く。また、内方部材本体や内輪の外周にスリンガ相当部を一体形成すれば、組立て部品数が増えることはないが、内方部材本体のプレス成形後に研削加工する箇所が増え、加工コストの増大を招く。   If a slinger is attached to the inner ring and the lip is slidably contacted with the slinger, the above problem can be avoided, but the assembly parts increase. In addition, if the slinger equivalent part is integrally formed on the outer periphery of the inner member main body or inner ring, the number of assembled parts will not increase, but the number of parts to be ground after press molding of the inner member main body will increase, increasing the processing cost. Invite.

そこで、この発明の課題は、外方部材と内方部材の取付け用フランジとの間からの浸水を防御するシール部材のリップが内方部材の内輪外周に摺接するようにした車輪軸受装置において、泥水や塵埃の堆積によってリップが傷むことを部品数や加工数を増加させることなく防止することにある。   Accordingly, an object of the present invention is to provide a wheel bearing device in which the lip of the seal member that prevents water from entering between the outer member and the mounting flange of the inner member is in sliding contact with the outer periphery of the inner ring of the inner member. The object is to prevent the lip from being damaged by the accumulation of muddy water and dust without increasing the number of parts and the number of processing.

上記の課題を達成するため、この発明は、外周に複列の軌道面を有する内方部材と、その各々の軌道面に対応する軌道面を有する外方部材と、前記内方部材と前記外方部材との間に介在する複列の転動体と、前記内方部材と前記外方部材との間を密封するシール部材を備え、前記内方部材を、取付け用フランジを外周に設けた内方部材本体の小外径部に内輪を嵌合したものとし、前記取付け用フランジ側に設けた前記シール部材のリップが前記内輪の外周に摺接するようにした車輪軸受装置において、前記内方部材本体の内輪突き合わせ面の高さを、前記内輪の外周のリップ摺接面より低く設けたことを特徴とするものである。   To achieve the above object, the present invention provides an inner member having a double row raceway surface on the outer periphery, an outer member having a raceway surface corresponding to each raceway surface, the inner member and the outer member. A double row rolling element interposed between the inner member and the outer member; and a seal member that seals between the inner member and the outer member; In the wheel bearing device in which an inner ring is fitted to a small outer diameter portion of a side member main body, and a lip of the seal member provided on the mounting flange side is in sliding contact with an outer periphery of the inner ring, the inner member The height of the inner ring butting surface of the main body is set lower than the lip sliding surface on the outer periphery of the inner ring.

この発明の構成によれば、内方部材本体の内輪突き合わせ面の高さを内輪の外周のリップ摺接面より低くしたため、泥水が両面間の段差によりリップ摺接面に達する前に落下し易くなる。さらに、停止時に内輪のリップ摺接面に付着していた泥水は、両面間の段差が落差となるため、排水され易くなり、この流れで塵埃も浚われるようになる。
したがって、リップ摺接面に泥や塵埃の堆積が生じ難くなり、これにより、リップが傷むことが防止される。また、内輪突き合わせ面の高さを内輪の外周のリップ摺接面より低くするだけで済み、部品数や加工数が増加することはない。 According to the configuration of the present invention, since the height of the inner ring butting surface of the inner member main body is lower than the lip sliding contact surface on the outer periphery of the inner ring, the muddy water easily falls before reaching the lip sliding contact surface due to the step between the both surfaces. Become. Further, the muddy water adhering to the lip sliding surface of the inner ring at the time of stopping becomes easy to be drained because of the difference in level between the two surfaces, and this flow also causes dust to be smeared.
Therefore, accumulation of mud and dust is less likely to occur on the lip sliding contact surface, thereby preventing the lip from being damaged. Further, the height of the inner ring abutting surface only needs to be lower than the lip sliding surface on the outer periphery of the inner ring, and the number of parts and the number of processing are not increased.

通常、内輪を圧入する内方部材本体は、取付け用フランジに隅Ｒ部が設けられる。この隅Ｒ部は、フランジ振れを所定内に抑制すると共に、プレス成形時に内方部材本体の歪を抑制するために設けられているが、軽量化のため、その肉付け量を可及的に減らすことが要求される。この発明は、隅Ｒ部の肉付け量を減らすことで上記内輪突き合わせ面を低くすることができ、内方部材本体の軽量化と両立させられる利点がある。   Usually, the inner member main body into which the inner ring is press-fitted is provided with a corner R portion on the mounting flange. The corner R portion is provided to suppress the flange runout within a predetermined range and to suppress distortion of the inner member main body during press molding. However, in order to reduce the weight, the amount of fleshing is reduced as much as possible. Is required. The present invention has the advantage that the inner ring butt surface can be lowered by reducing the amount of fleshing of the corner R portion, and the weight of the inner member main body can be reduced.

上述のように、この発明は、上記構成の採用により、外方部材と内方部材の取付け用フランジとの間からの浸水を防御するシール部材のリップが内方部材の内輪外周に摺接するようにした車輪軸受装置において、泥や塵埃の堆積によってリップが傷むことを部品数や加工数を増加させることなく防止することができる。   As described above, according to the present invention, by adopting the above-described configuration, the lip of the seal member that prevents water from entering between the outer member and the mounting flange of the inner member is in sliding contact with the outer periphery of the inner ring of the inner member. In the above wheel bearing device, it is possible to prevent the lip from being damaged by the accumulation of mud and dust without increasing the number of parts and the number of processing.

以下、この発明の実施形態を図１、図２に基づいて説明する。
実施形態に係る車輪軸受装置の基本的な構成は、前述の従来例のものと同様であり、外周に複列の軌道面１ａ、１ｂを有する内方部材１をブレーキロータ２側に取り付け、内方部材１の各々の軌道面に対応する軌道面３ａ、３ｂを有する外方部材３をナックル側に取り付ける駆動輪用のものとして構成されており、内方部材１と外方部材３との間に介在する複列の転動体４、４と、内方部材１と外方部材３との間の環状空間を密封するシール部材５、５とを備えたものである。 Hereinafter, embodiments of the present invention will be described with reference to FIGS.
The basic configuration of the wheel bearing device according to the embodiment is the same as that of the above-described conventional example, and an inner member 1 having double-row raceway surfaces 1a and 1b on the outer periphery is attached to the brake rotor 2 side. The outer member 3 having the raceway surfaces 3 a and 3 b corresponding to the raceway surfaces of the side member 1 is configured for a drive wheel to be attached to the knuckle side, and between the inner member 1 and the outer member 3. Are provided with double-row rolling elements 4, 4 interposed between them and seal members 5, 5 for sealing the annular space between the inner member 1 and the outer member 3.

この実施形態の内方部材１は、内周に駆動軸と嵌合するスプライン孔１１ａが形成され、外周に車輪取付け用フランジ１１ｂが形成された内方部材本体１１と、内方部材本体１１の小外径部に嵌合された内輪１２、１３とで構成されている。   The inner member 1 of this embodiment includes an inner member main body 11 in which a spline hole 11 a that fits the drive shaft is formed on the inner periphery and a wheel mounting flange 11 b is formed on the outer periphery, and the inner member main body 11. It is comprised by the inner ring | wheels 12 and 13 fitted by the small outer diameter part.

内方部材１の車輪取付け用フランジ１１ｂには、そのボルト孔１１ｃを利用してブレーキロータ２が取り付けられるようになっている。   The brake rotor 2 is attached to the wheel mounting flange 11b of the inner member 1 using the bolt hole 11c.

車輪取付け用フランジ１１ｂの隅Ｒ部に、面取り部を介してラジアル平面に平行な内輪突き合わせ面１１ｄが連設されている。アウタ側の内輪１２とインナ側の内輪１３とは、内方部材本体１１と図示省略の等速自在継手とで挟持される。その結果、内輪突き合わせ面１１ｄに内輪１２の一端面が押し付けられ、内輪１２の他端面にインナ側の内輪１３の一端面が押し付けられた状態に固定される。   An inner ring butting surface 11d parallel to the radial plane is connected to the corner R portion of the wheel mounting flange 11b via a chamfered portion. The inner ring 12 on the outer side and the inner ring 13 on the inner side are sandwiched between the inner member main body 11 and a constant velocity universal joint (not shown). As a result, one end surface of the inner ring 12 is pressed against the inner ring butting surface 11d, and the one end surface of the inner side inner ring 13 is pressed against the other end surface of the inner ring 12.

一方、外方部材３は、内輪１２、１３の各転走面１ａ、１ｂに対向する複列の転走面３ａ、３ｂが形成された外輪３１を、図示省略のフランジが外周に形成されたケース３２の内周に嵌合したものとなっている。外方部材３のフランジには、車体を接続するナックルがボルトにより取り付けられる。   On the other hand, the outer member 3 has an outer ring 31 formed with double-row rolling surfaces 3a, 3b facing the rolling surfaces 1a, 1b of the inner rings 12, 13, and a flange (not shown) formed on the outer periphery. The case 32 is fitted to the inner periphery. A knuckle for connecting the vehicle body is attached to the flange of the outer member 3 with a bolt.

各転動体４、４は、保持器により周方向に所定間隔をおいて保持される。   The rolling elements 4 and 4 are held at predetermined intervals in the circumferential direction by a cage.

アウタ側及びインナ側のシール部材５、５は、図２に示すように、外方部材３に嵌合固定される芯体５１にラジアルリップ５２ａ、５２ｂが二股状に固着された従来周知のものが利用されている。   As shown in FIG. 2, the outer-side and inner-side seal members 5 and 5 are well-known ones in which radial lips 52a and 52b are fixed in a bifurcated manner to a core body 51 fitted and fixed to the outer member 3. Is being used.

アウタ側、すなわち取付け用フランジ１１ｂ側のシール部材５は、そのラジアルリップ５２ａ、５２ｂが同側の内輪１２の外周に形成されたシール摺接面１２ａに摺接するようになっている。このシール摺接面１２ａには、円筒面に形成された内輪１２の肩部外径面が利用されている。   The seal member 5 on the outer side, that is, the mounting flange 11b side, has radial lips 52a and 52b that are in sliding contact with the seal sliding contact surface 12a formed on the outer periphery of the inner ring 12 on the same side. The outer surface of the shoulder portion of the inner ring 12 formed on the cylindrical surface is used as the seal sliding surface 12a.

この実施形態では、内輪突き合わせ面１１ｄの高さｒ１は、軸心からの半径方向距離で規定され、内方部材本体１１の外周全周に亘って同一に設けられている。一方、内輪１２のリップ摺接面１２ａの高さｒ２は、リップ摺接面１２ａが軸心と同心の円筒面であるから、軸心からの半径方向距離で規定される。上記のように規定される内輪突き合わせ面１１ｄの高さｒ１は、リップ摺接面１２ａの高さｒ２より低く設けられている。   In this embodiment, the height r1 of the inner ring abutting surface 11d is defined by the radial distance from the shaft center, and is provided uniformly over the entire outer periphery of the inner member main body 11. On the other hand, the height r2 of the lip sliding contact surface 12a of the inner ring 12 is defined by the radial distance from the axial center because the lip sliding contact surface 12a is a cylindrical surface concentric with the axial center. The height r1 of the inner ring butting surface 11d defined as described above is set lower than the height r2 of the lip sliding contact surface 12a.

この実施形態は、上記の構成を有するものであり取付け用フランジ１１ｂと外方部材３の間からの泥水Ｗは、内輪突き合わせ面１１ｄとリップ摺接面１２ａ間の段差（ｒ２−ｒ１）が存在するため、リップ摺接面１２ａに達する前に落下し易くなる。さらに、停止時にリップ摺接面１２ａに付着していた泥水Ｗは、上記の段差（ｒ２−ｒ１）が落差となるため、リップ摺接面１２ａ上から排水され易くなり、この流れで塵埃Ｃも浚われるようになる。したがって、リップ摺接面１２ａに泥水Ｗ中の泥や塵埃の堆積が生じ難くなり、これにより、ラジアルリップ５２ａ、５２ｂが傷むことが防止される。また、内輪突き合わせ面１１ｄの高さｒ１をリップ摺接面１２ａより低くするだけで済み、部品数や加工数が増加することはない。   In this embodiment, the muddy water W between the mounting flange 11b and the outer member 3 has a step (r2-r1) between the inner ring butting surface 11d and the lip sliding contact surface 12a. Therefore, it becomes easy to fall before reaching the lip sliding contact surface 12a. Further, the muddy water W adhering to the lip sliding contact surface 12a at the time of stoppage is easily drained from the lip sliding contact surface 12a because the step (r2-r1) becomes a drop, and the dust C is also generated by this flow. Become redeemed. Therefore, accumulation of mud and dust in the muddy water W is less likely to occur on the lip sliding contact surface 12a, thereby preventing the radial lips 52a and 52b from being damaged. Further, the height r1 of the inner ring abutting surface 11d only needs to be made lower than the lip sliding contact surface 12a, and the number of parts and the number of processing are not increased.

したがって、この実施形態に係る車輪軸受装置は、泥や塵埃の堆積によってラジアルリップ５２ａ、５２ｂが傷むことを部品数や加工数を増加させることなく防止することができる。   Therefore, the wheel bearing device according to this embodiment can prevent the radial lips 52a and 52b from being damaged by the accumulation of mud and dust without increasing the number of parts and the number of processing.

なお、この発明は、内方部材の取付け用フランジと外方部材との間からの泥水が内輪外周のリップ摺接面に達し得る車輪軸受装置に適用することができ、例えば、従動輪用、外方部材をハブ輪側とした外方部材回転用のものに適用可能である。上記の実施形態の如く、内方部材本体をハブ輪側とした内輪回転方式においては、車輪の泥はねにより内方部材の取付け用フランジと外方部材との間から泥水が入り易いため、この発明が特に好適なものである。   The present invention can be applied to a wheel bearing device in which muddy water from between the flange for mounting the inner member and the outer member can reach the lip-sliding contact surface on the outer periphery of the inner ring. The present invention can be applied to an outer member rotating member having the outer member on the hub wheel side. As in the above embodiment, in the inner ring rotation system in which the inner member main body is the hub wheel side, muddy water is likely to enter from between the flange for mounting the inner member and the outer member due to the mud splash of the wheel, This invention is particularly suitable.

実施形態の全体構成を示す縦断正面図Longitudinal front view showing the overall configuration of the embodiment 図１の内輪突き合わせ面の部分拡大図Partial enlarged view of the inner ring butting surface of FIG. 従来例の要部拡大正面図Main part enlarged front view of conventional example

符号の説明Explanation of symbols

１ 内方部材
１ａ、１ｂ、３ａ、３ｂ 軌道面
２ ブレーキロータ
３ 外方部材
４ 転動体
５ シール部材
１１ 内方部材本体
１１ｂ 車輪取付け用フランジ
１２、１３ 内輪
５１ 芯体
５２ａ、５２ｂ ラジアルリップ DESCRIPTION OF SYMBOLS 1 Inner member 1a, 1b, 3a, 3b Raceway surface 2 Brake rotor 3 Outer member 4 Rolling body 5 Seal member 11 Inner member main body 11b Wheel mounting flange 12, 13 Inner ring 51 Core body 52a, 52b Radial lip

Claims (1)

外周に複列の軌道面を有する内方部材と、その各々の軌道面に対応する軌道面を有する外方部材と、前記内方部材と前記外方部材との間に介在する複列の転動体と、前記内方部材と前記外方部材との間を密封するシール部材を備え、前記内方部材を、取付け用フランジを外周に設けた内方部材本体の小外径部に内輪を嵌合したものとし、前記取付け用フランジ側に設けた前記シール部材のリップが前記内輪の外周に摺接するようにした車輪軸受装置において、
前記内方部材本体の内輪突き合わせ面の高さを、前記内輪の外周のリップ摺接面より低く設けたことを特徴とする車輪軸受装置。 An inner member having a double row raceway surface on the outer periphery, an outer member having a raceway surface corresponding to each raceway surface, and a double row rolling member interposed between the inner member and the outer member. A moving member and a seal member that seals between the inner member and the outer member are provided, and the inner member is fitted with an inner ring on a small outer diameter portion of the inner member body provided with a mounting flange on the outer periphery. In the wheel bearing device in which the lip of the seal member provided on the mounting flange side is in sliding contact with the outer periphery of the inner ring,
The wheel bearing device according to claim 1, wherein a height of the inner ring butting surface of the inner member main body is set lower than a lip sliding surface on an outer periphery of the inner ring.
JP2007025377A 2007-02-05 2007-02-05 Wheel bearing device Pending JP2008190615A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007025377A JP2008190615A (en) 2007-02-05 2007-02-05 Wheel bearing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007025377A JP2008190615A (en) 2007-02-05 2007-02-05 Wheel bearing device

Publications (1)

Publication Number Publication Date
JP2008190615A true JP2008190615A (en) 2008-08-21

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Family Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9704747B2 (en) 2013-03-29 2017-07-11 Amkor Technology, Inc. Semiconductor device and manufacturing method thereof
WO2018225696A1 (en) * 2017-06-09 2018-12-13 Ntn株式会社 Generator-equipped wheel bearing device and system for vehicles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9704747B2 (en) 2013-03-29 2017-07-11 Amkor Technology, Inc. Semiconductor device and manufacturing method thereof
WO2018225696A1 (en) * 2017-06-09 2018-12-13 Ntn株式会社 Generator-equipped wheel bearing device and system for vehicles
JP2018203193A (en) * 2017-06-09 2018-12-27 Ntn株式会社 Wheel bearing device with generator and system for vehicle
JP7164937B2 (en) 2017-06-09 2022-11-02 Ntn株式会社 Bearing device for wheel with generator and system for vehicle

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