JP2007321903A - Bearing device for wheel - Google Patents

Bearing device for wheel Download PDF

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Publication number
JP2007321903A
JP2007321903A JP2006153764A JP2006153764A JP2007321903A JP 2007321903 A JP2007321903 A JP 2007321903A JP 2006153764 A JP2006153764 A JP 2006153764A JP 2006153764 A JP2006153764 A JP 2006153764A JP 2007321903 A JP2007321903 A JP 2007321903A
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Japan
Prior art keywords
wheel
ring
joint member
hub wheel
hub
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JP2006153764A
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Japanese (ja)
Inventor
Yoshiaki Kuchiki
義明 朽木
Takayasu Takubo
孝康 田窪
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2006153764A priority Critical patent/JP2007321903A/en
Publication of JP2007321903A publication Critical patent/JP2007321903A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/527—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to vibration and noise
    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To positively suppress a stick slip sound without causing a cost increase. <P>SOLUTION: This bearing device for a wheel comprises an outer ring 105 formed with double rows of raceway surfaces 113, 114 on the inner periphery; a hub wheel 101 and an inner ring 102 having a wheel mounting flange 109 at one end and double rows of raceway surfaces 107, 108 on the outer periphery; and double rows of rolling elements 103, 104 interposed between the raceway surfaces of the outer ring 105 and the hub wheel 101 and inner ring 102. An inboard side end of the hub wheel 101 is caulked to integrate the inner ring 102 with the hub wheel 101 by the caulking part 111, and a stem part 127 of an outer joint member 115 of a constant velocity universal joint 106 is inserted in the inner diameter of the hub wheel 101 and spline-fitted. An end face 111a of the fastening part 111 of the hub wheel 101 is joined in outer diameter edge so as to come into external contact with the end face 116a of a shoulder part 116 of the outer joint member 115, and a lubricant 131 is sealed in a cavity 132 formed between the end faces of the caulking part 111 and shoulder part 116 on the radial inside rather than the outer diameter edge contact between the joined caulking part 111 and shoulder part 116. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は車輪用軸受装置に関し、詳しくは、自動車の懸架装置に対して駆動車輪（ＦＦ車の前輪、ＦＲ車の後輪、４ＷＤ車の全輪）を回転自在に支持する駆動車輪用軸受装置に関する。   BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel bearing device, and more particularly, to a driving wheel bearing device that rotatably supports driving wheels (front wheels of FF vehicles, rear wheels of FR vehicles, all wheels of 4WD vehicles) with respect to a suspension device of an automobile. About.

自動車の車輪用軸受装置には、従動輪用と駆動輪用があり、それぞれの用途に応じて種々の形式のものが提案されている。例えば、図３は駆動車輪用軸受装置で、ハブ輪１および内輪２、複列の転動体３，４、外輪５、等速自在継手６を主要な構成要素としている（例えば、特許文献１参照）。   BACKGROUND ART There are two types of wheel bearing devices for automobiles, one for driven wheels and one for driving wheels, and various types have been proposed according to the respective applications. For example, FIG. 3 shows a bearing device for a driving wheel, which includes a hub wheel 1 and an inner ring 2, double-row rolling elements 3 and 4, an outer ring 5 and a constant velocity universal joint 6 as main components (for example, see Patent Document 1). ).

ハブ輪１は、その外周にアウトボード側の軌道面７が形成されると共に、車輪（図示せず）を取り付けるための車輪取付フランジ９を備えている。この車輪取付フランジ９の円周方向等間隔に、ディスクホイールを固定するためのハブボルト１０が植設されている。このハブ輪１のインボード側外径に形成された小径段部１２に内輪２を嵌合させ、この内輪２の外周にインボード側の軌道面８が形成されている。このハブ輪１の内径には、スプライン２８が形成されている。   The hub wheel 1 is provided with a wheel mounting flange 9 for mounting a wheel (not shown) while an outboard raceway surface 7 is formed on the outer periphery thereof. Hub bolts 10 for fixing the disc wheel are implanted at equal intervals in the circumferential direction of the wheel mounting flange 9. The inner ring 2 is fitted to a small diameter step portion 12 formed on the inboard side outer diameter of the hub wheel 1, and an inboard side raceway surface 8 is formed on the outer periphery of the inner ring 2. A spline 28 is formed on the inner diameter of the hub wheel 1.

内輪２は、クリープを防ぐために適当な締め代をもってハブ輪１の小径段部１２に圧入されている。ハブ輪１の外周に形成されたアウトボード側の軌道面７と、内輪２の外周に形成されたインボード側の軌道面８とで複列の軌道面を構成する。   The inner ring 2 is press-fitted into the small-diameter step portion 12 of the hub ring 1 with an appropriate tightening margin to prevent creep. The outboard side raceway surface 7 formed on the outer periphery of the hub wheel 1 and the inboard side raceway surface 8 formed on the outer periphery of the inner ring 2 constitute a double row raceway surface.

外輪５は、その内周にハブ輪１および内輪２の軌道面７，８と対向する複列の軌道面１３，１４が形成され、車体（図示せず）に取り付けるための車体取付フランジ１７を備えている。この車体取付フランジ１７は、車体の懸架装置（図示せず）から延びるナックルに取り付け孔１９を利用してボルト等で固定される。   The outer ring 5 is formed with double-row raceway surfaces 13 and 14 facing the raceway surfaces 7 and 8 of the hub wheel 1 and the inner ring 2 on the inner periphery thereof, and a vehicle body mounting flange 17 for attaching to the vehicle body (not shown). I have. The vehicle body mounting flange 17 is fixed to a knuckle extending from a vehicle suspension system (not shown) with a bolt or the like using a mounting hole 19.

軸受部２０は、複列のアンギュラ玉軸受構造で、ハブ輪１および内輪２の外周に形成された軌道面７，８と外輪５の内周に形成された軌道面１３，１４との間に転動体３，４を介在させ、各列の転動体３，４を保持器２１，２２により円周方向等間隔に支持した構造を有する。軸受部２０の両端開口部には、ハブ輪１と内輪２の外周に摺接するように、外輪５とハブ輪１および内輪２との環状空間を密封する一対のシール２３，２４が外輪５の両端部内径に嵌合され、内部に充填されたグリースの漏洩ならびに外部からの水や異物の侵入を防止するようになっている。   The bearing portion 20 has a double-row angular ball bearing structure, and between the raceway surfaces 7 and 8 formed on the outer periphery of the hub wheel 1 and the inner ring 2 and the raceway surfaces 13 and 14 formed on the inner periphery of the outer ring 5. The rolling elements 3 and 4 are interposed, and the rolling elements 3 and 4 in each row are supported by the cages 21 and 22 at equal intervals in the circumferential direction. A pair of seals 23, 24 that seal the annular space between the outer ring 5, the hub ring 1, and the inner ring 2 so as to be in sliding contact with the outer circumferences of the hub ring 1 and the inner ring 2 are formed at both ends of the bearing 20. It is fitted to the inner diameters at both ends, and prevents leakage of grease filled inside and intrusion of water and foreign matters from the outside.

等速自在継手６は、ドライブシャフトを構成する中間軸（図示せず）の一端に設けられ、内周面にトラック溝が形成された外側継手部材１５と、その外側継手部材１５のトラック溝と対向するトラック溝が外周面に形成された内側継手部材（図示せず）と、外側継手部材１５のトラック溝と内側継手部材のトラック溝との間に組み込まれたボールと、外側継手部材１５と内側継手部材間に介在してボールを円周方向等間隔に保持するケージとからなる。外側継手部材１５は、内側継手部材、ケージおよびボールを収容したマウス部２５と、マウス部２５から軸方向に一体的に延び、外周面にスプライン２６が形成されたステム部２７を有する。   The constant velocity universal joint 6 is provided at one end of an intermediate shaft (not shown) constituting the drive shaft, an outer joint member 15 having a track groove formed on the inner peripheral surface, and a track groove of the outer joint member 15. An inner joint member (not shown) having opposing track grooves formed on the outer peripheral surface, a ball incorporated between the track groove of the outer joint member 15 and the track groove of the inner joint member, and the outer joint member 15; The cage is interposed between the inner joint members and holds the balls at equal intervals in the circumferential direction. The outer joint member 15 includes a mouth portion 25 that houses the inner joint member, a cage, and a ball, and a stem portion 27 that extends integrally from the mouth portion 25 in the axial direction and has a spline 26 formed on the outer peripheral surface thereof.

このステム部２７をハブ輪１の内径に挿入し、内輪２の端面２ａに外側継手部材１５の肩部１６の端面１６ａを接合させた状態で、ステム部２７の先端に形成された雄ねじ部２９にナット３０を締め付けることによって、等速自在継手６をハブ輪１に固定している。このハブ輪１の内径およびステム部２７の外径に形成されたスプライン２８，２６を嵌合させることにより、両者間でのトルク伝達を可能としている。外側継手部材１５の肩部１６の端面１６ａと内輪２の端面２ａとの接合状態で、ナット３０の締め付け力により軸受部２０に予圧を付与している。
特開２０００−１１０８４０号公報（図６） The stem portion 27 is inserted into the inner diameter of the hub wheel 1, and the male screw portion 29 formed at the tip of the stem portion 27 in a state where the end surface 16 a of the shoulder portion 16 of the outer joint member 15 is joined to the end surface 2 a of the inner ring 2. The constant velocity universal joint 6 is fixed to the hub wheel 1 by tightening the nut 30 to the hub wheel 1. By fitting the splines 28 and 26 formed on the inner diameter of the hub wheel 1 and the outer diameter of the stem portion 27, torque transmission between them can be performed. A preload is applied to the bearing portion 20 by the tightening force of the nut 30 in a joined state between the end surface 16 a of the shoulder 16 of the outer joint member 15 and the end surface 2 a of the inner ring 2.
JP 2000-110840 A (FIG. 6)

ところで、前述した駆動輪用軸受装置では、例えば車両発進時、軸受部２０の内輪２と等速自在継手６の外側継手部材１５の肩部１６との間で、カッキン音と通称されるスティックスリップ音が発生するおそれがある。   By the way, in the drive wheel bearing device described above, for example, when the vehicle starts, a stick-slip, commonly referred to as a cuckling noise, between the inner ring 2 of the bearing portion 20 and the shoulder portion 16 of the outer joint member 15 of the constant velocity universal joint 6. Sound may be generated.

このスティックスリップ音は、車両発進時、静止状態にある軸受部２０のハブ輪１に対して等速自在継手６の外側継手部材１５から回転トルクが負荷されると、ステム部２７およびハブ輪１のスプライン２６，２８を介して外側継手部材１５からハブ輪１へ回転トルクを伝達しようとするが、外側継手部材１５のねじれにより内輪２の端面２ａと外側継手部材１５の肩部１６の端面１６ａとの間で急激な滑りが発生する。この急激な滑りが原因となってスティックスリップ音が発生する。   This stick-slip noise is generated when a rotational torque is applied from the outer joint member 15 of the constant velocity universal joint 6 to the hub wheel 1 of the bearing portion 20 that is stationary when the vehicle starts. Rotational torque is transmitted from the outer joint member 15 to the hub wheel 1 through the splines 26 and 28 of the inner joint 2, but the end surface 2 a of the inner ring 2 and the end surface 16 a of the shoulder 16 of the outer joint member 15 are twisted by the outer joint member 15. A sudden slip occurs between the two. This sudden slip causes stick-slip noise.

前述したスティックスリップ音を未然に防止する手段として、前述した特許文献１では、等速自在継手６の外側継手部材１５の肩部１６に接合される内輪２の端面２ａに、摩擦抵抗を小さくするための表面処理を施す手段が講じられている。この表面処理でもって、外側継手部材１５の肩部１６との摩擦抵抗を小さくすることにより、スムーズな滑りが得られてスティックスリップ音を抑制する効果を発揮させている。具体的な表面処理としては、グリース溝を円周方向に刻設したり、同心状筋目を研削加工により形成したり、あるいはボンデやグリース等の滑り剤をコーティングしたりする手段がある。   As means for preventing the above-described stick-slip noise, in Patent Document 1 described above, the frictional resistance is reduced on the end surface 2a of the inner ring 2 joined to the shoulder 16 of the outer joint member 15 of the constant velocity universal joint 6. Means for applying a surface treatment are provided. With this surface treatment, by reducing the frictional resistance with the shoulder portion 16 of the outer joint member 15, smooth slip is obtained and the effect of suppressing stick-slip noise is exerted. Specific surface treatment includes means for engraving grease grooves in the circumferential direction, forming concentric streaks by grinding, or coating with a slip agent such as a bonder or grease.

以上のように内輪２の端面２ａに表面処理を施すことにより、車両発進時、静止状態にある軸受部２０のハブ輪１に対して等速自在継手６の外側継手部材１５から回転トルクが負荷されても、外側継手部材１５の肩部１６との摩擦抵抗を小さくし、スムーズな滑りでもってスティックスリップ音を抑制する効果が得られている。   By applying surface treatment to the end surface 2a of the inner ring 2 as described above, rotational torque is applied from the outer joint member 15 of the constant velocity universal joint 6 to the hub wheel 1 of the bearing portion 20 in a stationary state when the vehicle starts. Even if it does, the frictional resistance with the shoulder part 16 of the outer joint member 15 is made small, and the effect of suppressing stick-slip noise by smooth sliding is obtained.

しかしながら、内輪２の端面２ａに表面処理を施す必要があることから、その製作過程が煩雑となって、ひいては軸受装置のコストアップを招くという問題があった。   However, since it is necessary to subject the end surface 2a of the inner ring 2 to a surface treatment, there is a problem that the manufacturing process becomes complicated and the cost of the bearing device is increased.

そこで、本発明は前述の問題点に鑑みて提案されたもので、その目的とするところは、コストアップを招くことなく、スティックスリップ音を確実に抑制し得る車輪用軸受装置を提供することにある。   Therefore, the present invention has been proposed in view of the above-described problems, and an object of the present invention is to provide a wheel bearing device that can reliably suppress stick-slip noise without causing an increase in cost. is there.

本発明を適用する対象は、内周に複列の軌道面が形成された外輪と、一端に車輪取付フランジを有すると共に外周に複列の軌道面が形成され、ハブ輪と内輪からなる内方部材と、前記外輪と内方部材のそれぞれの軌道面間に介装された複列の転動体とを備え、前記ハブ輪の内径に等速自在継手の外側継手部材のステム部を挿入してスプライン嵌合させた車輪用軸受装置である。   The object to which the present invention is applied is an inner ring composed of an outer ring having a double row raceway surface formed on the inner periphery, a wheel mounting flange at one end, and a double row raceway surface formed on the outer periphery. And a double row rolling element interposed between the raceway surfaces of the outer ring and the inner member, and the stem portion of the outer joint member of the constant velocity universal joint is inserted into the inner diameter of the hub ring. It is a wheel bearing device fitted with a spline.

この車輪用軸受装置において、前述の目的を達成するための技術的手段として、本発明は、内方部材あるいは外側継手部材のいずれか一方の部材を相手部材に外径当たりで接合し、その接合された両部材の外径当たりよりも径方向内側で両部材の端面間に形成された空隙に潤滑剤を封止したことを特徴とする。   In this wheel bearing device, as a technical means for achieving the above-mentioned object, the present invention joins either one of the inner member or the outer joint member to the counterpart member around the outer diameter, It is characterized in that a lubricant is sealed in a gap formed between the end faces of both members on the radially inner side of the outer diameters of the both members.

この車輪用軸受装置では、内方部材の端面と外側継手部材の端面との接合するに際して、その端面に潤滑剤を塗布することで、車両発進時にスムーズな滑りでもってスティックスリップ音を抑制する効果が得られる。しかしながら、内方部材および外側継手部材が回転するため、その回転による遠心力でもって潤滑剤が内方部材と外側継手部材の端面間から外方へ飛散したり、あるいは外部から侵入した水により洗われて流出したりする。その結果、潤滑剤によるスティックスリップ音の抑制効果が減少するおそれがあった。   In this wheel bearing device, when the end face of the inner member and the end face of the outer joint member are joined, a lubricant is applied to the end face, thereby suppressing the stick-slip noise with smooth slip when the vehicle starts. Is obtained. However, since the inner member and the outer joint member rotate, the centrifugal force generated by the rotation causes the lubricant to splash outward from between the end surfaces of the inner member and the outer joint member, or to be washed by water that has entered from the outside. It will be leaked. As a result, the effect of suppressing stick-slip noise by the lubricant may be reduced.

そこで、本発明では、内方部材あるいは外側継手部材のいずれか一方の部材を相手部材に外径当たりで接合し、その接合された両部材の外径当たりよりも径方向内側で両部材の端面間に形成された空隙に潤滑剤を封止したことにより、内方部材および外側継手部材の回転による遠心力が作用しても、潤滑剤が外方へ飛散したり、水により流出したりすることを防止できる。   Therefore, in the present invention, either the inner member or the outer joint member is joined to the mating member around the outer diameter, and the end faces of the two members are radially inner than the outer diameters of the joined members. Sealing the lubricant in the gap formed between them causes the lubricant to scatter outward or flow out due to water even if centrifugal force is generated by the rotation of the inner member and the outer joint member. Can be prevented.

ここで、「外径当たり」とは、内方部材あるいは外側継手部材のいずれか一方の部材の端面の外径端縁のみを相手部材の端面に接合させることを意味する。これにより、その接合された部材の端面の外径端縁よりも径方向内側で、内方部材の端面と外側継手部材の端面間に形成された空隙に潤滑剤を封止する。   Here, “per outer diameter” means that only the outer diameter edge of the end face of either the inner member or the outer joint member is joined to the end face of the mating member. Thus, the lubricant is sealed in the gap formed between the end surface of the inner member and the end surface of the outer joint member, on the radially inner side of the outer diameter edge of the end surface of the joined member.

なお、潤滑剤を封止する空隙は、外径当たりにより形成される構造であれば、任意の構造を採用することが可能である。つまり、内方部材あるいは外側継手部材の少なくともいずれか一方の部材の端面に凹所を設けたり、あるいは一方の部材の端面に対して他方の端面をテーパ状としたりすることで実現可能である。   In addition, as long as the space | gap which seals a lubricant is a structure formed per outer diameter, it is possible to employ | adopt arbitrary structures. That is, it can be realized by providing a recess in the end surface of at least one of the inner member and the outer joint member, or by tapering the other end surface with respect to the end surface of one member.

本発明における車輪用軸受装置としては、外輪の外周に車体取付フランジを有し、複列の軌道面のうちの一方の軌道面をハブ輪の外周に形成し、他方の軌道面を内輪の外周に形成したものがある。この場合、ハブ輪の外径に内輪を圧入してそのハブ輪の突出端部を加締め、その加締め部を外側継手部材の肩部に外径当たりで接合することになる。   The wheel bearing device according to the present invention has a vehicle body mounting flange on the outer periphery of the outer ring, one raceway surface of the double row raceway surfaces is formed on the outer periphery of the hub wheel, and the other raceway surface is the outer periphery of the inner ring. There is something formed. In this case, the inner ring is press-fitted into the outer diameter of the hub wheel, the projecting end portion of the hub ring is swaged, and the swaged portion is joined to the shoulder of the outer joint member around the outer diameter.

本発明によれば、内方部材あるいは外側継手部材のいずれか一方の部材を相手部材に外径当たりで接合し、その接合された両部材の外径当たりよりも径方向内側で両部材の端面間に形成された空隙に潤滑剤を封止したことにより、内方部材および外側継手部材の回転による遠心力が作用しても、潤滑剤が外方へ飛散したり、水により流出したりすることを防止できる。   According to the present invention, either the inner member or the outer joint member is joined to the mating member around the outer diameter, and the end faces of the two members are radially inward from the outer diameter of the joined members. Sealing the lubricant in the gap formed between them causes the lubricant to scatter outward or flow out due to water even if centrifugal force is generated by the rotation of the inner member and the outer joint member. Can be prevented.

その結果、内方部材と外側継手部材との端面間で潤滑剤を確保することができるので、その潤滑剤によりスムーズな滑りでもってスティックスリップ音を抑制する効果を容易に維持することが可能となり、車両における静粛性の向上が図れて搭乗者の違和感を解消することができる。   As a result, since the lubricant can be secured between the end surfaces of the inner member and the outer joint member, it is possible to easily maintain the effect of suppressing stick-slip noise with smooth slip by the lubricant. Thus, the quietness of the vehicle can be improved and the discomfort of the passenger can be eliminated.

本発明に係る車輪用軸受装置の実施形態を以下に詳述する。図１に示す実施形態は駆動車輪用軸受装置で、内方部材であるハブ輪１０１および内輪１０２、複列の転動体１０３，１０４、外輪１０５、等速自在継手１０６を主要な構成要素としている。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トボード側（図面左側）と呼び、中央寄りとなる側をインボード側（図面右側）と呼ぶ。   An embodiment of a wheel bearing device according to the present invention will be described in detail below. The embodiment shown in FIG. 1 is a bearing device for a drive wheel, and includes a hub wheel 101 and an inner ring 102 as inner members, double row rolling elements 103 and 104, an outer ring 105, and a constant velocity universal joint 106 as main components. . In the following description, the side closer to the outside of the vehicle in the state assembled to the vehicle is referred to as the outboard side (left side in the drawing), and the side closer to the center is referred to as the inboard side (right side in the drawing).

ハブ輪１０１は、その外周にアウトボード側の軌道面１０７が形成されると共に、車輪（図示せず）を取り付けるための車輪取付フランジ１０９を備えている。この車輪取付フランジ１０９の円周方向等間隔に、ディスクホイールを固定するためのハブボルト１１０が植設されている。このハブ輪１０１のインボード側外周に形成された小径段部１１２に内輪１０２を嵌合させ、この内輪１０２の外周にインボード側の軌道面１０８が形成されている。このハブ輪１０１の内径には、スプライン１２８が形成されている。   The hub wheel 101 is provided with a wheel mounting flange 109 for mounting a wheel (not shown) while an outboard raceway surface 107 is formed on the outer periphery thereof. Hub bolts 110 for fixing the disc wheel are implanted at equal intervals in the circumferential direction of the wheel mounting flange 109. An inner ring 102 is fitted to a small-diameter step 112 formed on the inboard side outer periphery of the hub wheel 101, and an inboard side raceway surface 108 is formed on the outer periphery of the inner ring 102. A spline 128 is formed on the inner diameter of the hub wheel 101.

内輪１０２は、クリープを防ぐために適当な締め代をもってハブ輪１０１の小径段部１１２に圧入されている。ハブ輪１０１の外周に形成されたアウトボード側の軌道面１０７と、内輪１０２の外周に形成されたインボード側の軌道面１０８とで複列の軌道面を構成する。この内輪１０２をハブ輪１０１の小径段部１１２の外径に圧入し、ハブ輪１０１の小径段部１１２の突出端部を揺動加締めにより外側に加締めることにより、その加締め部１１１でもって内輪１０２を抜け止めしてハブ輪１０１と一体化し、軸受部１２０に予圧を付与している。   The inner ring 102 is press-fitted into the small-diameter step portion 112 of the hub ring 101 with an appropriate tightening margin to prevent creep. The outboard side raceway surface 107 formed on the outer periphery of the hub wheel 101 and the inboard side raceway surface 108 formed on the outer periphery of the inner ring 102 constitute a double row raceway surface. The inner ring 102 is press-fitted into the outer diameter of the small-diameter stepped portion 112 of the hub wheel 101, and the protruding end portion of the small-diameter stepped portion 112 of the hub wheel 101 is crimped outward by swing caulking, whereby the caulking portion 111 Accordingly, the inner ring 102 is prevented from coming off and integrated with the hub ring 101, and a preload is applied to the bearing portion 120.

外輪１０５は、内周にハブ輪１０１および内輪１０２の軌道面１０７，１０８と対向する複列の軌道面１１３，１１４が形成され、車体（図示せず）に取り付けるための車体取付フランジ１１７を備えている。この車体取付フランジ１１７は、車体の懸架装置（図示せず）から延びるナックルに取り付け孔１１９を利用してボルト等で固定される。   The outer ring 105 is formed with double-row raceway surfaces 113 and 114 facing the raceway surfaces 107 and 108 of the hub wheel 101 and the inner ring 102 on the inner periphery, and includes a vehicle body attachment flange 117 for attachment to a vehicle body (not shown). ing. The vehicle body mounting flange 117 is fixed to a knuckle extending from a vehicle suspension system (not shown) using a mounting hole 119 with a bolt or the like.

軸受部１２０は、複列のアンギュラ玉軸受構造で、ハブ輪１０１および内輪１０２の外周に形成された軌道面１０７，１０８と外輪１０５の内周に形成された軌道面１１３，１１４との間に転動体１０３，１０４を介在させ、各列の転動体１０３，１０４を保持器１２１，１２２により円周方向等間隔に支持した構造を有する。軸受部１２０の両端開口部には、ハブ輪１０１と内輪１０２の外周に摺接するように、外輪１０５とハブ輪１０１および内輪１０２との環状空間を密封する一対のシール１２３，１２４が外輪１０５の両端部内径に嵌合され、内部に充填されたグリースの漏洩ならびに外部からの水や異物の侵入を防止するようになっている。   The bearing portion 120 has a double-row angular ball bearing structure, and between the raceway surfaces 107 and 108 formed on the outer periphery of the hub ring 101 and the inner ring 102 and the raceway surfaces 113 and 114 formed on the inner periphery of the outer ring 105. The rolling elements 103 and 104 are interposed, and the rolling elements 103 and 104 in each row are supported by the cages 121 and 122 at equal intervals in the circumferential direction. A pair of seals 123, 124 that seal the annular space between the outer ring 105, the hub ring 101, and the inner ring 102 so as to be in sliding contact with the outer circumferences of the hub ring 101 and the inner ring 102 are provided at both ends of the bearing 120. It is fitted to the inner diameters at both ends, and prevents leakage of grease filled inside and intrusion of water and foreign matters from the outside.

等速自在継手１０６は、ドライブシャフトを構成する中間軸（図示せず）の一端に設けられ、内周面にトラック溝が形成された外側継手部材１１５と、その外側継手部材１１５のトラック溝と対向するトラック溝が外周面に形成された内側継手部材（図示せず）と、外側継手部材１１５のトラック溝と内側継手部材のトラック溝との間に組み込まれたボールと、外側継手部材１１５と内側継手部材間に介在してボールを円周方向等間隔に保持するケージとからなる。外側継手部材１１５は、内側継手部材、ケージおよびボールを収容したマウス部１２５と、マウス部１２５から軸方向に一体的に延び、外周面にスプライン１２６が形成されたステム部１２７を有する。   The constant velocity universal joint 106 is provided at one end of an intermediate shaft (not shown) constituting the drive shaft, and has an outer joint member 115 in which a track groove is formed on the inner peripheral surface, and a track groove of the outer joint member 115. An inner joint member (not shown) having opposing track grooves formed on the outer peripheral surface, a ball incorporated between the track groove of the outer joint member 115 and the track groove of the inner joint member, and the outer joint member 115; The cage is interposed between the inner joint members and holds the balls at equal intervals in the circumferential direction. The outer joint member 115 includes a mouth portion 125 that houses the inner joint member, a cage, and a ball, and a stem portion 127 that extends integrally from the mouth portion 125 in the axial direction and has a spline 126 formed on the outer peripheral surface thereof.

このステム部１２７をハブ輪１０１の貫通孔に挿入し、そのハブ輪１０１の加締め部１１１に外側継手部材１１５の肩部１１６を接合させた状態で、ステム部１２７の端部に形成された雄ねじ部１２９にナット１３０を締め付けることによって、等速自在継手１０６をハブ輪１０１に固定している。このステム部１２７の外周面に形成されたスプライン１２６とハブ輪１０１の貫通孔の内周面に形成されたスプライン１２８により両者を嵌合させることによりトルク伝達可能としている。   The stem portion 127 is formed in the end portion of the stem portion 127 in a state where the stem portion 127 is inserted into the through hole of the hub wheel 101 and the shoulder portion 116 of the outer joint member 115 is joined to the crimped portion 111 of the hub wheel 101. The constant velocity universal joint 106 is fixed to the hub wheel 101 by tightening a nut 130 on the male thread portion 129. Torque can be transmitted by fitting both the spline 126 formed on the outer peripheral surface of the stem portion 127 and the spline 128 formed on the inner peripheral surface of the through hole of the hub wheel 101.

この実施形態の車輪用軸受装置では、ハブ輪１０１の加締め部１１１と外側継手部材１１５の肩部１１６との突き合わせを以下の構造とする。図２は、図１に示すハブ輪１０１の加締め部１１１と外側継手部材１１５の肩部１１６との突き合わせ部分Ａを示す拡大図である。この図２に示すように、内方部材であるハブ輪１０１のインボード側端部に位置する加締め部１１１の端面１１１ａを外側継手部材１１５の肩部１１６の端面１１６ａに外径当たりで接合する。   In the wheel bearing device of this embodiment, the butting between the caulking portion 111 of the hub wheel 101 and the shoulder portion 116 of the outer joint member 115 has the following structure. FIG. 2 is an enlarged view showing a butt portion A between the caulking portion 111 of the hub wheel 101 shown in FIG. 1 and the shoulder portion 116 of the outer joint member 115. As shown in FIG. 2, the end surface 111a of the caulking portion 111 located at the inboard side end portion of the hub wheel 101 which is an inward member is joined to the end surface 116a of the shoulder portion 116 of the outer joint member 115 around the outer diameter. To do.

ここで、外径当たりとは、加締め部１１１の端面１１１ａの外径端縁のみを外側継手部材１１５の肩部１１６の端面１１６ａに接合させ、その加締め部１１１の端面１１１ａの外径端縁よりも径方向内側部位を外側継手部材１１５の肩部１１６の端面１１６ａに接合させないことを意味する。この外径当たりは、例えば、ハブ輪１０１のインボード側端部を加締める際に、その加締め部１１１の端面１１１ａが内径側から外径側へ向けてすり鉢状となるように形成することで実現可能である。   Here, per outer diameter means that only the outer diameter edge of the end surface 111a of the crimped portion 111 is joined to the end surface 116a of the shoulder portion 116 of the outer joint member 115, and the outer diameter end of the end surface 111a of the crimped portion 111 is. This means that the radially inner portion of the edge is not joined to the end surface 116 a of the shoulder 116 of the outer joint member 115. For example, when the inboard side end portion of the hub wheel 101 is caulked, the end surface 111a of the caulking portion 111 is formed in a mortar shape from the inner diameter side toward the outer diameter side. It is feasible.

加締め部１１１の端面１１１ａと外側継手部材１１５の肩部１１６の端面１１６ａとの接合面に潤滑剤１３１を塗布することで、車両発進時にスムーズな滑りでもってスティックスリップ音を抑制する効果が得られる。そこで、加締め部１１１の端面１１１ａを外側継手部材１１５の肩部１１６の端面１１６ａに外径当たりで接合することにより、その接合された加締め部１１１と肩部１１６との外径当たりよりも径方向内側で、加締め部１１１のすり鉢状端面１１１ａと肩部１１６の平坦状端面１１６ａ間に形成された空隙１３２に前述の潤滑剤１３１を封止する。   By applying the lubricant 131 to the joint surface between the end surface 111a of the crimping portion 111 and the end surface 116a of the shoulder portion 116 of the outer joint member 115, an effect of suppressing stick-slip noise with smooth slipping when the vehicle starts is obtained. It is done. Therefore, by joining the end surface 111a of the crimped portion 111 to the end surface 116a of the shoulder portion 116 of the outer joint member 115 around the outer diameter, the outer surface diameter of the joined crimped portion 111 and the shoulder portion 116 is larger than that of the joined portion. The above-described lubricant 131 is sealed in the gap 132 formed between the mortar-shaped end surface 111a of the caulking portion 111 and the flat-shaped end surface 116a of the shoulder portion 116 on the radially inner side.

このようにすれば、ハブ輪１０１および外側継手部材１１５の回転による遠心力が作用しても、外径当たりにより、潤滑剤１３１が加締め部１１１と肩部１１６の端面間から外方へ飛散したり、あるいは外部から侵入した水により洗われて流出したりすることを防止できる。その結果、加締め部１１１と肩部１１６との端面間で潤滑剤１３１を確保することができるので、その潤滑剤１３１によりスムーズな滑りでもってスティックスリップ音を抑制する効果を容易に維持することができる。   In this way, even if a centrifugal force due to the rotation of the hub wheel 101 and the outer joint member 115 acts, the lubricant 131 scatters outward from between the end faces of the crimped portion 111 and the shoulder portion 116 due to the outer diameter. Or washed out by water entering from the outside and flowing out. As a result, since the lubricant 131 can be secured between the end surfaces of the crimped portion 111 and the shoulder portion 116, the lubricant 131 can easily maintain the effect of suppressing stick-slip noise with smooth sliding. Can do.

なお、前述した加締め部１１１の端面１１１ａはすり鉢状に限れず、外側継手部材１１５の肩部１１６の平坦な端面１１６ａとの間で空隙１３２が形成されるようにすればよく、その形状は任意である。また逆に、加締め部１１１の端面１１１ａを平坦状とし、外側継手部材１１５の肩部１１６の端面１１６ａを凹状に形成することにより、加締め部１１１の端面１１１ａと外側継手部材１１５の肩部１１６の端面１１６ａ間に空隙１３２を形成するようにしてもよい。   The end surface 111a of the caulking portion 111 described above is not limited to a mortar shape, and the gap 132 may be formed between the flat end surface 116a of the shoulder portion 116 of the outer joint member 115. Is optional. Conversely, the end surface 111a of the caulking portion 111 and the shoulder portion of the outer joint member 115 are formed by making the end surface 111a of the caulking portion 111 flat and forming the end surface 116a of the shoulder portion 116 of the outer joint member 115 concave. A gap 132 may be formed between the end faces 116 a of 116.

以上の実施形態では、内方部材に形成された複列の軌道面１０７，１０８の一方、つまり、アウトボード側の軌道面１０７をハブ輪１０１の外周に形成した（第三世代と称される）タイプの車輪用軸受装置に適用した場合を例示したが、本発明はこれに限定されることなく、ハブ輪の外周に一対の内輪を圧入し、アウトボード側の軌道面１０７を一方の内輪の外周に形成すると共にインボード側の軌道面１０８を他方の内輪の外周に形成した（第一、第二世代と称される）タイプの車輪用軸受装置にも適用可能である。   In the above embodiment, one of the double-row raceway surfaces 107 and 108 formed on the inner member, that is, the outboard raceway surface 107 is formed on the outer periphery of the hub wheel 101 (referred to as a third generation). However, the present invention is not limited to this, but a pair of inner rings are press-fitted into the outer periphery of the hub wheel, and the race surface 107 on the outboard side is used as one inner ring. It is also applicable to a wheel bearing device of a type (referred to as first and second generation) in which the inboard side raceway surface 108 is formed on the outer periphery of the other inner ring.

さらに、ハブ輪１０１と等速自在継手１０６の結合構造として、この実施形態では、等速自在継手１０６の外側継手部材１１５が、そのステム部１２７の先端に形成された雄ねじ部１２９にナット１３０を螺合させることによりハブ輪１０１の内径に締結されている構造を例示しているが、これ以外に、等速自在継手１０６の外側継手部材１１５が、そのステム部１２７の先端を加締めることによりハブ輪１０１の内径に締結されている構造にも適用可能である。   Furthermore, as a coupling structure of the hub wheel 101 and the constant velocity universal joint 106, in this embodiment, the outer joint member 115 of the constant velocity universal joint 106 is provided with a nut 130 on the male screw portion 129 formed at the tip of the stem portion 127. A structure in which the hub wheel 101 is fastened to the inner diameter of the hub wheel 101 by screwing is illustrated, but besides this, the outer joint member 115 of the constant velocity universal joint 106 is caulked at the tip of the stem portion 127. The present invention can also be applied to a structure that is fastened to the inner diameter of the hub wheel 101.

本発明に係る車輪用軸受装置の実施形態を示す断面図である。It is sectional drawing which shows embodiment of the wheel bearing apparatus which concerns on this invention. 図１の車輪用軸受装置の要部拡大断面図である。It is a principal part expanded sectional view of the wheel bearing apparatus of FIG. 車輪用軸受装置の従来例を示す断面図である。It is sectional drawing which shows the prior art example of the wheel bearing apparatus. 図３の車輪用軸受装置の要部拡大断面図である。It is a principal part expanded sectional view of the wheel bearing apparatus of FIG.

符号の説明Explanation of symbols

１０１ 内方部材（ハブ輪）
１０２ 内方部材（内輪）
１０３，１０４ 転動体
１０５ 外輪
１０６ 等速自在継手
１０７，１０８ 軌道面
１０９ 車輪取付フランジ
１１１ 加締め部
１１３，１１４ 軌道面
１１５ 外側継手部材
１１６ 肩部
１３１ 潤滑剤
１３２ 空隙 101 Inner member (hub ring)
102 Inner member (inner ring)
DESCRIPTION OF SYMBOLS 103,104 Rolling body 105 Outer ring 106 Constant velocity universal joint 107,108 Raceway surface 109 Wheel mounting flange 111 Clamping part 113,114 Raceway surface 115 Outer joint member 116 Shoulder part 131 Lubricant 132 Space | gap

Claims (3)

内周に複列の軌道面が形成された外輪と、一端に車輪取付フランジを有すると共に外周に複列の軌道面が形成され、ハブ輪と内輪からなる内方部材と、前記外輪と内方部材のそれぞれの軌道面間に介装された複列の転動体とを備え、前記ハブ輪の内径に等速自在継手の外側継手部材のステム部を挿入してスプライン嵌合させた車輪用軸受装置において、前記内方部材あるいは外側継手部材のいずれか一方の部材を相手部材に外径当たりで接合し、その接合された両部材の外径当たりよりも径方向内側で両部材の端面間に形成された空隙に潤滑剤を封止したことを特徴とする車輪用軸受装置。   An outer ring having a double-row raceway surface formed on the inner periphery, a wheel mounting flange at one end and a double-row raceway surface formed on the outer periphery, an inner member comprising a hub ring and an inner ring, the outer ring and the inner ring And a double row rolling element interposed between the raceway surfaces of the member, and a wheel bearing in which the stem portion of the outer joint member of the constant velocity universal joint is inserted into the inner diameter of the hub ring and is spline-fitted. In the apparatus, either the inner member or the outer joint member is joined to the mating member around the outer diameter, and between the end faces of the two members on the radially inner side than the outer diameter of the joined members. A bearing device for a wheel, wherein a lubricant is sealed in the formed gap. 前記外輪の外周に車体取付フランジを有し、複列の軌道面のうちの一方の軌道面をハブ輪の外周に形成した請求項１に記載の車輪用軸受装置。   2. The wheel bearing device according to claim 1, further comprising a vehicle body mounting flange on an outer periphery of the outer ring, wherein one raceway surface of the double row raceway surfaces is formed on the outer periphery of the hub wheel. 前記ハブ輪の外径に内輪を圧入してそのハブ輪の突出端部を加締め、その加締め部を外側継手部材の肩部に外径当たりで接合した請求項１又は２に記載の車輪用軸受装置。   The wheel according to claim 1 or 2, wherein an inner ring is press-fitted into an outer diameter of the hub ring, a protruding end portion of the hub ring is swaged, and the swaged portion is joined to a shoulder portion of an outer joint member around the outer diameter. Bearing device.
JP2006153764A 2006-06-01 2006-06-01 Bearing device for wheel Withdrawn JP2007321903A (en)

Priority Applications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009125657A1 (en) * 2008-04-10 2009-10-15 Ntn株式会社 Bearing device for wheel
JP2009248625A (en) * 2008-04-02 2009-10-29 Ntn Corp Bearing device for wheel
JP2010042733A (en) * 2008-08-11 2010-02-25 Ntn Corp Bearing device for driving wheel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009248625A (en) * 2008-04-02 2009-10-29 Ntn Corp Bearing device for wheel
WO2009125657A1 (en) * 2008-04-10 2009-10-15 Ntn株式会社 Bearing device for wheel
US9261145B2 (en) 2008-04-10 2016-02-16 Ntn Corporation Bearing device for a wheel
US10086648B2 (en) 2008-04-10 2018-10-02 Ntn Corporation Bearing device for a wheel
JP2010042733A (en) * 2008-08-11 2010-02-25 Ntn Corp Bearing device for driving wheel

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