JP2010106925A - Rolling bearing unit - Google Patents

Rolling bearing unit Download PDF

Info

Publication number
JP2010106925A
JP2010106925A JP2008278436A JP2008278436A JP2010106925A JP 2010106925 A JP2010106925 A JP 2010106925A JP 2008278436 A JP2008278436 A JP 2008278436A JP 2008278436 A JP2008278436 A JP 2008278436A JP 2010106925 A JP2010106925 A JP 2010106925A
Authority
JP
Japan
Prior art keywords
outer ring
lip
axial direction
rolling bearing
inner ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2008278436A
Other languages
Japanese (ja)
Inventor
Tatsuya Yokota
竜哉 横田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JTEKT Corp
Original Assignee
JTEKT Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JTEKT Corp filed Critical JTEKT Corp
Priority to JP2008278436A priority Critical patent/JP2010106925A/en
Publication of JP2010106925A publication Critical patent/JP2010106925A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • F16C33/80—Labyrinth sealings
    • F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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

Landscapes

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing unit which can reduce the possibility that a foreign substance may enter into the roll bearing member of the rolling bearing unit. <P>SOLUTION: In a hub wheel 4, a concave row section 31 is formed by making part except for a counter surface section 34 facing the end surface section 32 of an outer ring 1 recessed on the vehicle outer side in an axial direction A of the outer ring 1 and the wall surface 25 facing the axial direction A. Furthermore, a base end section 26b of a first lip section 26 of a sealing member 7 is arranged at a location equal to a clearance 33 formed between the end surface section 32 of the outer ring 1 and a counter surface section 34 of the hub wheel 4 in an axial direction A, and a tip section 26a of the first lip section 26 is made to enter into the concave row section 31 and contact with the concave row section 31. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、転がり軸受装置に関するものである。   The present invention relates to a rolling bearing device.

本明細書では、転がり軸受装置の一例である車両用のハブユニットについて説明する。車両（例えば、自動車）には、タイヤホイールやブレーキディスクを取り付けるためのハブユニットが使用されている。図１に示されるように、ハブユニット１００は、車体側に固定される外輪８１と、外輪８１と同心に配置されるハブホイール８２（内輪）と、これら外輪８１とハブホイール８２との間に介装される玉８３（転動体）とを備えており、ハブホイール８２が軸線ＣＬ周りに回転自在とされている。そして、このハブホイール８２に図示しない車輪（タイヤ）が取り付けられる。   This specification demonstrates the hub unit for vehicles which is an example of a rolling bearing apparatus. A hub unit for attaching a tire wheel and a brake disk is used in a vehicle (for example, an automobile). As shown in FIG. 1, the hub unit 100 includes an outer ring 81 fixed to the vehicle body side, a hub wheel 82 (inner ring) arranged concentrically with the outer ring 81, and between the outer ring 81 and the hub wheel 82. The ball 83 (rolling element) is provided, and the hub wheel 82 is rotatable around the axis line CL. A wheel (tire) (not shown) is attached to the hub wheel 82.

図５に示されるように、ハブユニット１００を構成する外輪８１とハブホイール８２との間には、回転抵抗を生じさせないように僅かな隙間８４が設けられていて、この隙間８４から、雨水や融雪剤を含む泥水等（以下、総称して「異物」と記載する。）が侵入する場合がある。これを防ぐため、外輪８１のアキシャル方向の端面部には、密封部材８５が取り付けられている。しかし、侵入した異物により、密封部材８５が摩耗してしまうおそれがある。すると、転がり軸受の部分（例えば、転動面）に異物が侵入し、転がり軸受を損傷させてしまう。   As shown in FIG. 5, a slight gap 84 is provided between the outer ring 81 and the hub wheel 82 constituting the hub unit 100 so as not to cause rotational resistance. Muddy water or the like containing a snow melting agent (hereinafter collectively referred to as “foreign matter”) may enter. In order to prevent this, a sealing member 85 is attached to the end surface portion of the outer ring 81 in the axial direction. However, the sealing member 85 may be worn by the foreign matter that has entered. As a result, foreign matter enters the part of the rolling bearing (for example, the rolling surface) and damages the rolling bearing.

特に、隙間８４とアキシャル方向に対応する位置に、密封部材８５のリップ部８６の先端部が配置されている。このため、隙間８４から侵入した異物は、リップ部８６の先端部に堆積し、その自重により徐々にリップ部８６を撓ませる。これにより、異物が密封部材８５を越えて転がり軸受の部分に侵入したり、リップ部８６とハブホイール８２との接触圧が増大し、リップ部８６を早期に摩耗させたりするという不具合が発生するおそれがある。   In particular, the tip of the lip portion 86 of the sealing member 85 is disposed at a position corresponding to the gap 84 and the axial direction. For this reason, the foreign matter that has entered through the gap 84 accumulates at the tip of the lip portion 86 and gradually deflects the lip portion 86 by its own weight. As a result, foreign matter enters the rolling bearing portion beyond the sealing member 85, or the contact pressure between the lip portion 86 and the hub wheel 82 increases, causing the lip portion 86 to wear out at an early stage. There is a fear.

上記の問題を防ぐため、特許文献１に開示される技術が存している。この技術では、外輪とハブホイールとの隙間をラビリンス部として、異物を侵入しにくくしている。しかし、ラビリンス部を形成するために別部材（シールド板２８）を取り付けている（特許文献１の図１の（Ｂ）又は図７の（Ｂ）を参照）。このため、別部材の組付け工数が必要となってしまう。
特開２００５−１４７２９８号公報 In order to prevent the above problem, a technique disclosed in Patent Document 1 exists. In this technique, a gap between the outer ring and the hub wheel is used as a labyrinth portion to make it difficult for foreign matter to enter. However, another member (shield plate 28) is attached to form the labyrinth portion (see FIG. 1B of FIG. 1 or FIG. 7B). For this reason, the assembly man-hour of another member will be needed.
JP 2005-147298 A

本発明は、上記した事情に鑑み、転がり軸受装置における転がり軸受の部分に異物が侵入しにくくなるようにすることを課題としている。   This invention makes it a subject to make it difficult for a foreign material to penetrate | invade in the part of the rolling bearing in a rolling bearing apparatus in view of the above situation.

課題を解決するための手段及び発明の効果Means for Solving the Problems and Effects of the Invention

上記課題を達成するための本発明は、
筒状の外輪と、該外輪と同心に配置される内輪と、前記外輪と前記内輪との間に介装される転動体と、前記外輪と前記内輪との間から前記転動体の転動面に異物が侵入しないようにその開口を密封する密封部材とを備え、前記外輪と前記内輪がそれらの軸線周りに相対回転可能にされる転がり軸受装置であって、
前記密封部材は、前記外輪におけるアキシャル方向の端部に嵌合される芯金と、該芯金に被着されるシール部とを備え、前記シール部から突設されたリップ部が、前記内輪における前記外輪と対向する壁面部に接触することにより、前記外輪と前記内輪との間にラジアル方向に沿って形成された隙間を通って侵入する異物を阻止するようにされてなり、
前記内輪における前記外輪とアキシャル方向に対向する壁面部のうち、前記外輪の端面部と対向する部分を除く部分を外輪から遠ざかる側に凹ませて、周方向に連続する凹条部を形成し、前記密封部材のリップ部を前記凹条部に接触させたことを特徴としている。 The present invention for achieving the above-mentioned problems
A cylindrical outer ring, an inner ring disposed concentrically with the outer ring, a rolling element interposed between the outer ring and the inner ring, and a rolling surface of the rolling element between the outer ring and the inner ring A rolling bearing device that includes a sealing member that seals its opening so that foreign matter does not enter the outer ring, and the outer ring and the inner ring are relatively rotatable about their axes,
The sealing member includes a core metal fitted to an end portion of the outer ring in the axial direction, and a seal part attached to the core metal, and a lip part protruding from the seal part includes the inner ring In contact with the wall portion facing the outer ring in order to prevent foreign matter from entering through a gap formed along the radial direction between the outer ring and the inner ring,
Of the wall portion facing the outer ring in the inner ring in the axial direction, a portion excluding the portion facing the end surface portion of the outer ring is recessed toward the side away from the outer ring, forming a continuous ridge portion in the circumferential direction, The lip portion of the sealing member is in contact with the concave strip portion.

本発明に係る転がり軸受装置は、上記したように構成されていて、内輪の壁面部のうち、外輪の端面部と対向する部分を除く部分を外輪から遠ざかる側に凹ませて、周方向に連続する凹条部を形成し、前記密封部材のリップ部を前記凹条部に接触させている。これにより、密封部材のリップ部の先端部は、凹条部に入り込んで配置されるため、リップ部の先端部に異物が堆積しにくくなる。即ち、異物の自重によってリップ部の先端部が撓んだり、リップ部の先端部と内輪の壁面部との接触圧を増大させたりすることが抑止されるため、リップ部が早期に摩耗することが防止される。また、異物が、リップ部を越えて転がり軸受の部分に侵入することが防止される。   The rolling bearing device according to the present invention is configured as described above. Of the wall surface portion of the inner ring, the portion excluding the portion facing the end surface portion of the outer ring is recessed toward the side away from the outer ring, and is continuously in the circumferential direction. A concave strip portion is formed, and a lip portion of the sealing member is brought into contact with the concave strip portion. Thereby, since the front-end | tip part of the lip | rip part of a sealing member penetrates and arrange | positions in a recessed strip part, it becomes difficult to deposit a foreign material on the front-end | tip part of a lip | rip part. In other words, since the tip of the lip is bent by the dead weight of the foreign matter or the contact pressure between the tip of the lip and the wall surface of the inner ring is prevented, the lip is worn early. Is prevented. Further, foreign matter is prevented from entering the rolling bearing portion beyond the lip portion.

前記密封部材のリップ部は、その先端部が基端部よりもラジアル方向の外側に配置されるように軸線に対して所定角度で斜めに突設され、
前記リップ部のアキシャル方向の投影長さは、前記隙間のアキシャル方向の内幅と前記凹条部のアキシャル方向の凹み量との和よりも長くなっている。 The lip portion of the sealing member is protruded obliquely at a predetermined angle with respect to the axis so that the distal end portion is disposed on the outer side in the radial direction from the proximal end portion,
The projected length of the lip portion in the axial direction is longer than the sum of the inner width of the gap in the axial direction and the amount of dent in the axial direction of the recess.

これにより、密封部材が外輪に嵌合されたとき、リップ部の基端部が隙間とアキシャル方向に対応される位置に配置されるとともに、リップ部の先端部が、内輪の凹条部に接触する。この結果、隙間を通って侵入した異物は、密封部材のリップ部の基端部に堆積され、密封部材のリップ部の早期摩耗が抑止される。   Thereby, when the sealing member is fitted to the outer ring, the base end portion of the lip portion is disposed at a position corresponding to the gap and the axial direction, and the tip portion of the lip portion is in contact with the concave portion of the inner ring. To do. As a result, the foreign matter that has entered through the gap is deposited on the base end portion of the lip portion of the sealing member, and early wear of the lip portion of the sealing member is suppressed.

前記内輪の壁面部において、前記外輪の端面部と対向する壁面部と前記凹条部との連結部は、前記凹条部との接続縁部の方が前記対向する壁面部との接続縁部よりもラジアル方向の外側に配置されるように斜めに形成されていることが望ましい。   In the wall surface portion of the inner ring, the connection portion between the wall surface portion facing the end surface portion of the outer ring and the concave strip portion is a connection edge portion between the connection edge portion with the concave strip portion and the facing wall surface portion. It is desirable to form it diagonally so that it may be arrange | positioned rather than the radial direction outside.

これにより、内輪の壁面部を伝って侵入する異物を、内輪が相対回転したときの遠心力によって排出させることができる。   Thereby, the foreign material which invades along the wall surface part of the inner ring can be discharged by the centrifugal force when the inner ring rotates relatively.

本発明の実施例を説明する。図１は第１実施例のハブユニット１０１の全体図、図２は密封部材７の拡大図、図３は図２の要部の拡大図である。   Examples of the present invention will be described. 1 is an overall view of the hub unit 101 of the first embodiment, FIG. 2 is an enlarged view of a sealing member 7, and FIG. 3 is an enlarged view of a main part of FIG.

最初に、センサ付き転がり軸受装置の一例である車両用のハブユニット１０１の全体構成について説明する。図１に示されるように、第１実施例のハブユニット１０１は、外輪１と、この外輪１と同心に配置され、インナ側の外周面に内輪部材２が圧入されているとともに、軸部３が一体に組み付けられたハブホイール４（内輪）と、外輪１と内輪部材２又はハブホイール４との間に介装された玉５（転動体）と、それらのアキシャル方向の開口を密封する車両インナ側の密封部材６と車両アウタ側の密封部材７とを備えている。外輪１は、ボルト８により車体側部材であるナックル９に固定されていて、ハブホイール４が軸線ＣＬの周りに回転可能とされている。なお、図１において、図面視における左側は車両インナ側であり、同じく右側は車両アウタ側である。また、ラジアル方向を符号「Ｒ」で示し、アキシャル方向を符号「Ａ」で示す。   First, the overall configuration of a vehicle hub unit 101 which is an example of a sensor-equipped rolling bearing device will be described. As shown in FIG. 1, the hub unit 101 of the first embodiment is arranged concentrically with the outer ring 1 and the outer ring 1, and the inner ring member 2 is press-fitted into the outer peripheral surface on the inner side, and the shaft portion 3. Is a vehicle that seals the hub wheel 4 (inner ring) integrally assembled, the ball 5 (rolling element) interposed between the outer ring 1 and the inner ring member 2 or the hub wheel 4, and the axial opening thereof. An inner side sealing member 6 and a vehicle outer side sealing member 7 are provided. The outer ring 1 is fixed to a knuckle 9 that is a vehicle body side member by a bolt 8, and the hub wheel 4 is rotatable around an axis line CL. In FIG. 1, the left side in the drawing is the vehicle inner side, and the right side is the vehicle outer side. Further, the radial direction is indicated by a symbol “R”, and the axial direction is indicated by a symbol “A”.

最初に、ハブホイール４について説明する。ハブホイール４には、車輪やブレーキディスク（いずれも図示せず）を固定するためのハブフランジ１０がラジアル方向Ｒの外側に突出して設けられている。このハブフランジ１０の所定位置には、ハブボルト１１を挿通するためのボルト孔１０ａが形成されている。また、ハブフランジ１０における車両アウタ側の主表面には、ブレーキディスクロータ及びタイヤホイール（いずれも図示せず）を取り付ける際に位置決めの役割を果たすインロー部１２が、車両アウタ側に突出して形成されている。このインロー部１２により、ブレーキディスクロータ及びタイヤホイールの位置決めを行う。そして、ボルト孔１０ａに挿通されたハブボルト１１を締め込むことにより、ハブフランジ１０にブレーキディスクロータ及びタイヤホイールを固定する。   First, the hub wheel 4 will be described. A hub flange 10 for fixing a wheel and a brake disk (both not shown) is provided on the hub wheel 4 so as to protrude outward in the radial direction R. A bolt hole 10 a for inserting the hub bolt 11 is formed at a predetermined position of the hub flange 10. In addition, an inlay portion 12 that plays a role of positioning when attaching a brake disc rotor and a tire wheel (both not shown) is formed on the main surface of the hub flange 10 on the vehicle outer side so as to protrude toward the vehicle outer side. ing. The inlay portion 12 positions the brake disc rotor and the tire wheel. Then, the brake disc rotor and the tire wheel are fixed to the hub flange 10 by tightening the hub bolt 11 inserted through the bolt hole 10a.

内輪部材２及びハブホイール４には、多数個の玉５を転動自在に配置するための内輪側転動面１３，１４が形成されている。多数個の玉５は、冠形の保持器１５，１６によって周方向に一定間隔となるように保持されている。   The inner ring member 2 and the hub wheel 4 are formed with inner ring-side rolling surfaces 13 and 14 for disposing a large number of balls 5 in a freely rollable manner. A large number of balls 5 are held by the crown-shaped cages 15 and 16 at regular intervals in the circumferential direction.

次に、外輪１について説明する。外輪１は、炭素鋼を熱間鍛造して製造される。外輪１において、内輪側転動面１３，１４と対向する部分には、各外輪側転動面１７，１８が形成されている。保持器１５，１６によって周方向に一定間隔で配置された多数個の玉５は、各内輪側転動面１３，１４と外輪１の各外輪転動面１７，１８とによって転動自在に保持される。外輪１における車両インナ側の端部には、密封部材４を圧入して嵌合させるためのインナ側嵌合部１９が設けられている。同様に、外輪１における車両アウタ側の端部にも、密封部材４を圧入して嵌合させるためのアウタ側嵌合部２１が設けられている。   Next, the outer ring 1 will be described. The outer ring 1 is manufactured by hot forging carbon steel. In the outer ring 1, outer ring-side rolling surfaces 17 and 18 are formed at portions facing the inner ring-side rolling surfaces 13 and 14. A large number of balls 5 arranged at regular intervals in the circumferential direction by the cages 15 and 16 are held by the inner ring-side rolling surfaces 13 and 14 and the outer ring rolling surfaces 17 and 18 of the outer ring 1 so as to roll freely. Is done. An inner side fitting portion 19 for press-fitting and fitting the sealing member 4 is provided at the end of the outer ring 1 on the vehicle inner side. Similarly, an outer side fitting portion 21 for press-fitting the sealing member 4 into the outer ring 1 on the vehicle outer side is also provided.

そして、外輪１の外周面には、ラジアル方向Ｒの外側に突出する外輪フランジ部２２が形成されている。ハブユニット１０１は、外輪フランジ部２２のボルト孔（図示せず）に挿通されたボルト７により、ナックル８に固定される。   An outer ring flange portion 22 that protrudes outward in the radial direction R is formed on the outer circumferential surface of the outer ring 1. The hub unit 101 is fixed to the knuckle 8 by a bolt 7 inserted into a bolt hole (not shown) of the outer ring flange portion 22.

次に、密封部材６，７について説明する。図１に示されるように、外輪１とハブホイール４とが軸線ＣＬを同一にして取り付けられた状態において、外輪１のインナ側嵌合部１９とハブホイール４との間、及び外輪１のアウタ側嵌合部２１とハブホイール４との間には空間部が形成されていて、これらの空間部を密封する密封部材６，７が装着されている。密封部材６，７はリング状で、外輪１とハブホイール４との相対回転を許容した状態で空間部を密封している。   Next, the sealing members 6 and 7 will be described. As shown in FIG. 1, in a state where the outer ring 1 and the hub wheel 4 are attached with the same axis line CL, between the inner side fitting portion 19 of the outer ring 1 and the hub wheel 4, and the outer of the outer ring 1. Space portions are formed between the side fitting portion 21 and the hub wheel 4, and sealing members 6 and 7 for sealing these space portions are mounted. The sealing members 6 and 7 are ring-shaped, and seal the space in a state in which relative rotation between the outer ring 1 and the hub wheel 4 is allowed.

本明細書では、車両アウタ側の密封部材７について詳細に説明する。なお、車両インナ側の密封部材６についても殆ど同様である。図２に示されるように、密封部材７は、外輪１の内周面に嵌合されるリング状の芯金２３と、この芯金２３に被着されるシール部２４とを備えている。そして、シール部２４からハブホイール４の車両インナ側の壁面部２５に向かって突出する第１リップ部２６と、ハブホイール４の外周面２７に向かって突出する第２及び第３のリップ部２８，２９とが設けられている。第１ないし第３のリップ部２６，２８，２９は、ハブホイール４の壁面部２５の凹条部３１（後述）又は外周面２７と接触している。これにより、異物がハブユニット１０１の転がり軸受の部分に侵入することが阻止されている。   In this specification, the vehicle outer side sealing member 7 will be described in detail. The same applies to the sealing member 6 on the vehicle inner side. As shown in FIG. 2, the sealing member 7 includes a ring-shaped cored bar 23 fitted to the inner peripheral surface of the outer ring 1 and a seal portion 24 attached to the cored bar 23. Then, a first lip portion 26 that protrudes from the seal portion 24 toward the wall surface portion 25 on the vehicle inner side of the hub wheel 4, and second and third lip portions 28 that protrude toward the outer peripheral surface 27 of the hub wheel 4. , 29 are provided. The first to third lip portions 26, 28, and 29 are in contact with a concave strip portion 31 (described later) or the outer peripheral surface 27 of the wall surface portion 25 of the hub wheel 4. This prevents foreign matter from entering the rolling bearing portion of the hub unit 101.

第１リップ部２６は、シール部２４の高さ方向（ラジアル方向Ｒ）のほぼ中央部から、アキシャル方向Ａで車両アウタ側に向かって突設されている。第１リップ部２６の先端部２６ａは、その基端部２６ｂ（シール部２４との接続部）よりもラジアル方向Ｒの外側に配置されている（換言すれば、第１リップ部２６は、軸線ＣＬに対して角度θで斜めになるように配置されている）。   The first lip portion 26 protrudes from the substantially central portion in the height direction (radial direction R) of the seal portion 24 toward the vehicle outer side in the axial direction A. The distal end portion 26a of the first lip portion 26 is disposed on the outer side in the radial direction R from the proximal end portion 26b (connecting portion with the seal portion 24) (in other words, the first lip portion 26 has an axial line It is arranged so as to be inclined at an angle θ with respect to CL).

外輪１の車両アウタ側の端面部３２と、ハブホイール４の車両インナ側の壁面部２５との間には、アキシャル方向Ａに僅かな隙間３３が形成されている。また、ハブホイール４における壁面部２５のうち、外輪１の車両アウタ側の端面部３２と対向する部分（対向面部３４）を除く部分は、対向面部３４よりも車両アウタ側に凹んでおり、当該部分に周方向に連続する凹条部３１が形成されている。   A slight gap 33 is formed in the axial direction A between the end surface portion 32 of the outer ring 1 on the vehicle outer side and the wall surface portion 25 of the hub wheel 4 on the vehicle inner side. Further, of the wall surface portion 25 of the hub wheel 4, a portion excluding a portion (facing surface portion 34) facing the vehicle outer side end surface portion 32 of the outer ring 1 is recessed toward the vehicle outer side from the facing surface portion 34. A concave strip 31 that is continuous in the circumferential direction is formed in the portion.

ここで、隙間３３のアキシャル方向Ａの内幅をＬ１、凹条部３１のアキシャル方向Ａの長さ（凹み量）をＬ２とし、第１リップ部２６の長さをＬ３とする。本実施例のハブユニット１０１の場合、第１リップ部２６をアキシャル方向Ａに投影したときの長さ（Ｌ３×ｃｏｓθ）は、隙間３３の内幅Ｌ１と凹条部３１の凹み量Ｌ２との和よりも長い（Ｌ３ｃｏｓθ＞Ｌ１＋Ｌ２）。これにより、第１リップ部２６の基端部２６ｂが、隙間３３とアキシャル方向Ａに同一となる位置に配置されたとき、第１リップ部２６の先端部２６ａは、所定の接触圧をもって凹条部３１に接触する。このため、隙間３３を通過した異物は、第１リップ部２６の基端部２６ｂに堆積する。換言すれば、異物が、第１リップ部２６の先端部２６ａに堆積することはない。   Here, the inner width of the gap 33 in the axial direction A is L1, the length of the concave portion 31 in the axial direction A (the amount of depression) is L2, and the length of the first lip portion 26 is L3. In the case of the hub unit 101 of the present embodiment, the length (L3 × cos θ) when the first lip portion 26 is projected in the axial direction A is equal to the inner width L1 of the gap 33 and the recess amount L2 of the recess 31. Longer than the sum (L3 cos θ> L1 + L2). Thus, when the base end portion 26b of the first lip portion 26 is disposed at the same position in the axial direction A as the gap 33, the distal end portion 26a of the first lip portion 26 is recessed with a predetermined contact pressure. Contact part 31. For this reason, the foreign matter that has passed through the gap 33 accumulates on the base end portion 26 b of the first lip portion 26. In other words, no foreign matter is deposited on the tip portion 26 a of the first lip portion 26.

従来のハブユニット１００の場合、図５に示されるように、密封部材７の第１リップ部８６の先端部が、隙間８４とアキシャル方向Ａに同一となる位置に配置されている。このため、第１リップ部８６の先端部に異物が堆積し、第１リップ部８６を早期に摩耗させてしまう。しかし、本実施例のハブユニット１０１の場合、隙間３３とアキシャル方向Ａに同一となる位置には、密封部材７の第１リップ部２６の基端部が配置されている。このため、隙間３３を通って侵入する異物は、第１リップ部２６の基端部２６ｂに堆積し、第１リップ部２６の先端部２６ａとハブホイール４の凹条部３１との接触圧を増大させるおそれが小さくなり、第１リップ部２６の早期摩耗が抑止される。   In the case of the conventional hub unit 100, as shown in FIG. 5, the distal end portion of the first lip portion 86 of the sealing member 7 is arranged at the same position as the gap 84 in the axial direction A. For this reason, a foreign substance accumulates on the front-end | tip part of the 1st lip part 86, and will wear the 1st lip part 86 at an early stage. However, in the case of the hub unit 101 of the present embodiment, the base end portion of the first lip portion 26 of the sealing member 7 is disposed at the same position in the axial direction A as the gap 33. For this reason, foreign matter that enters through the gap 33 accumulates on the proximal end portion 26b of the first lip portion 26, and the contact pressure between the distal end portion 26a of the first lip portion 26 and the concave strip portion 31 of the hub wheel 4 is reduced. The risk of increase is reduced, and early wear of the first lip portion 26 is suppressed.

本実施例のハブユニット１０１の作用について説明する。車両のタイヤが回転するのに伴い、ハブホイール４が所定方向に回転する。図２に示されるように、走行中の車両のハブユニット１０１の転がり軸受の部分に、異物が侵入しようとする。外輪１とハブホイール４との間に形成された隙間３３に侵入した異物は、そのまま隙間３３を通り、密封部材７の第１リップ部２６の基端部２６ｂに堆積する。異物の堆積量が増大しても、第１リップ部２６の先端部２６ａとハブホイール４の凹条部３１との接触圧は殆ど変化しないため、第１リップ部２６の先端部２６ａが摩耗しにくくなる。また、第１リップ部２６の先端部２６ａに到達する異物の量も少なくなる。   The operation of the hub unit 101 of this embodiment will be described. As the vehicle tire rotates, the hub wheel 4 rotates in a predetermined direction. As shown in FIG. 2, a foreign object tries to enter the rolling bearing portion of the hub unit 101 of the traveling vehicle. The foreign matter that has entered the gap 33 formed between the outer ring 1 and the hub wheel 4 passes through the gap 33 as it is and accumulates on the base end portion 26 b of the first lip portion 26 of the sealing member 7. Even if the amount of accumulated foreign matter increases, the contact pressure between the tip end portion 26a of the first lip portion 26 and the concave strip portion 31 of the hub wheel 4 hardly changes, so that the tip end portion 26a of the first lip portion 26 is worn. It becomes difficult. Further, the amount of foreign matter that reaches the tip end portion 26a of the first lip portion 26 is also reduced.

もし、異物が第１リップ部２６を越えたとしても、当該異物は、第２及び第３のリップ部２８，２９によってそれ以上侵入することが阻止される。これにより、転がり軸受の寿命が長くなる。   Even if the foreign matter exceeds the first lip portion 26, the foreign matter is prevented from entering further by the second and third lip portions 28 and 29. This prolongs the life of the rolling bearing.

次に、第２実施例のハブユニット１０２について説明する。図３に示される第２実施例のハブユニット１０２のように、外輪１の端面部３２とハブホイール４の対向面部３４との間に、ラビリンス形状の隙間３５を形成してもよい。この実施例のハブユニット１０２の場合、外輪１の端面部３２に、周方向に連続する凹条部３６を形成するとともに、ハブホイール４の対向面部３４に、外輪１の凹条部３６に入り込む突条部３７を周方向に連続して形成して、断面をクランク形状としている。これにより、隙間３５を通過する異物の量は、第１実施例のハブユニット１０１及び従来のハブユニット１００と比較して、極めて少なくなる。この結果、密封部材７の第１リップ部２６の基端部２６ｂに堆積する異物の量も少なくなり、転がり軸受の更なる長寿命化が図られる。   Next, the hub unit 102 of the second embodiment will be described. As in the hub unit 102 of the second embodiment shown in FIG. 3, a labyrinth-shaped gap 35 may be formed between the end surface portion 32 of the outer ring 1 and the facing surface portion 34 of the hub wheel 4. In the case of the hub unit 102 of this embodiment, a concave ridge portion 36 continuous in the circumferential direction is formed on the end surface portion 32 of the outer ring 1, and enters the concave ridge portion 36 of the outer ring 1 on the opposing surface portion 34 of the hub wheel 4. The ridges 37 are formed continuously in the circumferential direction, and the cross section has a crank shape. As a result, the amount of foreign matter passing through the gap 35 is extremely small compared to the hub unit 101 of the first embodiment and the conventional hub unit 100. As a result, the amount of foreign matter deposited on the base end portion 26b of the first lip portion 26 of the sealing member 7 is reduced, and the life of the rolling bearing can be further extended.

次に、第３実施例のハブユニット１０３について説明する。上記した第１及び第２実施例のハブユニット１０１，１０２において、ハブホイール４の対向面部３４と凹条部３１との連結部３８は、アキシャル方向Ａの車両インナ側が、車両アウタ側よりもラジアル方向Ｒの外側に配置されるように斜めに形成されている（図２参照）。これにより、ハブホイール４の対向面部３４及び連結部３８を伝って侵入しようとする異物を、遠心力により排出し易くなっている。   Next, the hub unit 103 of the third embodiment will be described. In the hub units 101 and 102 of the first and second embodiments described above, the connecting portion 38 between the facing surface portion 34 of the hub wheel 4 and the concave strip portion 31 is more radial on the vehicle inner side in the axial direction A than on the vehicle outer side. It is formed obliquely so as to be disposed outside the direction R (see FIG. 2). Thereby, it is easy to discharge the foreign matter that tries to enter through the facing surface portion 34 and the connecting portion 38 of the hub wheel 4 by centrifugal force.

しかし、図４に示される第３実施例のハブユニット１０３のように、連結部３９が、ハブホイール４の対向面部３４と凹条部３１とに対してほぼ直角に設けられていてもよい。この実施例のハブユニット１０３の場合、ハブホイール４の対向面部３４を伝って侵入しようとする異物を、対向面部３４と連結部３９との直角部分（接続縁部４１）で切って、確実に第１リップ部２６の基端部２６ｂに堆積させることができる。   However, like the hub unit 103 of the third embodiment shown in FIG. 4, the connecting portion 39 may be provided substantially at right angles to the facing surface portion 34 of the hub wheel 4 and the concave strip portion 31. In the case of the hub unit 103 of this embodiment, the foreign matter that is about to enter through the facing surface portion 34 of the hub wheel 4 is cut at a right angle portion (connection edge portion 41) between the facing surface portion 34 and the connecting portion 39, and reliably. It can be deposited on the base end portion 26 b of the first lip portion 26.

第１実施例のハブユニット１０１の全体図である。1 is an overall view of a hub unit 101 according to a first embodiment. 図１の要部の拡大図である。It is an enlarged view of the principal part of FIG. 第２実施例のハブユニット１０２の要部の拡大図である。It is an enlarged view of the principal part of the hub unit 102 of 2nd Example. 第３実施例のハブユニット１０３の要部の拡大図である。It is an enlarged view of the principal part of the hub unit 103 of 3rd Example. 従来のハブユニット１００の要部の拡大図である。It is an enlarged view of the principal part of the conventional hub unit 100. FIG.

符号の説明Explanation of symbols

１０１〜１０３ ハブユニット（転がり軸受装置）
１ 外輪
２ 内輪部材（内輪）
４ ハブホイール（内輪）
５ 玉（転動体）
６，７ 密封部材
１３，１４，１７，１８ 転動面
２３ 芯金
２４ シール部
２５ 壁面部
２６，２８，２９ リップ部
２６ａ 先端部
２６ｂ 基端部
３１ 凹条部
３２ 端面部
３３，３５ 隙間
３４ 対向面部（対向する部分）
３８，３９ 連結部
４１ 接続縁部
Ａ アキシャル方向
ＣＬ 軸線
Ｒ ラジアル方向
Ｌ１，Ｌ２，Ｌ３ 長さ 101-103 Hub unit (rolling bearing device)
1 outer ring 2 inner ring member (inner ring)
4 Hub wheel (inner ring)
5 balls (rolling elements)
6, 7 Seal member 13, 14, 17, 18 Rolling surface 23 Core 24 Seal portion 25 Wall portion 26, 28, 29 Lip portion 26a Tip portion 26b Base end portion 31 Recessed portion 32 End surface portion 33, 35 Gap 34 Opposing surface part (opposing part)
38, 39 Connecting part 41 Connection edge A Axial direction CL Axis line R Radial direction L1, L2, L3 Length

Claims (3)

筒状の外輪と、該外輪と同心に配置される内輪と、前記外輪と前記内輪との間に介装される転動体と、前記外輪と前記内輪との間から前記転動体の転動面に異物が侵入しないようにその開口を密封する密封部材とを備え、前記外輪と前記内輪がそれらの軸線周りに相対回転可能にされる転がり軸受装置であって、
前記密封部材は、前記外輪におけるアキシャル方向の端部に嵌合される芯金と、該芯金に被着されるシール部とを備え、前記シール部から突設されたリップ部が、前記内輪における前記外輪と対向する壁面部に接触することにより、前記外輪と前記内輪との間にラジアル方向に沿って形成された隙間を通って侵入する異物を阻止するようにされてなり、
前記内輪における前記外輪とアキシャル方向に対向する壁面部のうち、前記外輪の端面部と対向する部分を除く部分を外輪から遠ざかる側に凹ませて、周方向に連続する凹条部を形成し、前記密封部材のリップ部を前記凹条部に接触させたことを特徴とする転がり軸受装置。 A cylindrical outer ring, an inner ring disposed concentrically with the outer ring, a rolling element interposed between the outer ring and the inner ring, and a rolling surface of the rolling element between the outer ring and the inner ring A rolling bearing device that includes a sealing member that seals its opening so that foreign matter does not enter the outer ring, and the outer ring and the inner ring are relatively rotatable about their axes,
The sealing member includes a core metal fitted to an end portion of the outer ring in the axial direction, and a seal part attached to the core metal, and a lip part protruding from the seal part includes the inner ring In contact with the wall portion facing the outer ring in order to prevent foreign matter from entering through a gap formed along the radial direction between the outer ring and the inner ring,
Of the wall portion facing the outer ring in the inner ring in the axial direction, a portion excluding the portion facing the end surface portion of the outer ring is recessed toward the side away from the outer ring, forming a continuous ridge portion in the circumferential direction, A rolling bearing device in which a lip portion of the sealing member is brought into contact with the concave portion. 前記密封部材のリップ部は、その先端部が基端部よりもラジアル方向の外側に配置されるように軸線に対して所定角度で斜めに突設され、
前記リップ部のアキシャル方向の投影長さは、前記隙間のアキシャル方向の内幅と前記凹条部のアキシャル方向の凹み量との和よりも長いことを特徴とする請求項１に記載の転がり軸受装置。 The lip portion of the sealing member is protruded obliquely at a predetermined angle with respect to the axis so that the distal end portion is disposed on the outer side in the radial direction from the proximal end portion,
2. The rolling bearing according to claim 1, wherein a projected length of the lip portion in the axial direction is longer than a sum of an inner width of the gap in the axial direction and a recess amount of the concave portion in the axial direction. apparatus. 前記内輪の壁面部において、前記外輪の端面部と対向する壁面部と前記凹条部との連結部は、前記凹条部との接続縁部の方が前記対向する壁面部との接続縁部よりもラジアル方向の外側に配置されるように斜めに形成されていることを特徴とする請求項１又は２に記載の転がり軸受装置。   In the wall surface portion of the inner ring, the connection portion between the wall surface portion facing the end surface portion of the outer ring and the concave strip portion is a connection edge portion between the connection edge portion with the concave strip portion and the facing wall surface portion. The rolling bearing device according to claim 1, wherein the rolling bearing device is formed obliquely so as to be disposed on an outer side in a radial direction.
JP2008278436A 2008-10-29 2008-10-29 Rolling bearing unit Pending JP2010106925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008278436A JP2010106925A (en) 2008-10-29 2008-10-29 Rolling bearing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008278436A JP2010106925A (en) 2008-10-29 2008-10-29 Rolling bearing unit

Publications (1)

Publication Number Publication Date
JP2010106925A true JP2010106925A (en) 2010-05-13

Family

ID=42296576

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008278436A Pending JP2010106925A (en) 2008-10-29 2008-10-29 Rolling bearing unit

Country Status (1)

Country Link
JP (1) JP2010106925A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013053642A (en) * 2011-09-01 2013-03-21 Nissan Motor Co Ltd Wheel bearing
ITTO20120604A1 (en) * 2012-07-09 2014-01-10 Skf Ab BEARING-HUB ASSEMBLY UNIT WITH SEALING DEVICE
JP2017048809A (en) * 2015-08-31 2017-03-09 Ntn株式会社 Wheel baring device
JP2017166548A (en) * 2016-03-15 2017-09-21 Ntn株式会社 Wheel bearing device
CN108569083A (en) * 2017-03-14 2018-09-25 奥迪股份公司 Wheel support component for motor vehicle
JP2018162809A (en) * 2017-03-24 2018-10-18 Ntn株式会社 Bearing device for wheel
DE102020105299A1 (en) * 2019-12-16 2021-06-17 Schaeffler Technologies AG & Co. KG Sealing arrangement of a wheel bearing

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013053642A (en) * 2011-09-01 2013-03-21 Nissan Motor Co Ltd Wheel bearing
ITTO20120604A1 (en) * 2012-07-09 2014-01-10 Skf Ab BEARING-HUB ASSEMBLY UNIT WITH SEALING DEVICE
EP2685118A1 (en) * 2012-07-09 2014-01-15 Aktiebolaget SKF Wheel hub rolling bearing assembly for a motor vehicle with a sealing device
US8905641B2 (en) 2012-07-09 2014-12-09 Aktiebolaget Skf Hub bearing assembly with a sealing device
US10479139B2 (en) 2015-08-31 2019-11-19 Ntn Corporation Wheel bearing apparatus
JP2017048809A (en) * 2015-08-31 2017-03-09 Ntn株式会社 Wheel baring device
JP2017166548A (en) * 2016-03-15 2017-09-21 Ntn株式会社 Wheel bearing device
CN108569083A (en) * 2017-03-14 2018-09-25 奥迪股份公司 Wheel support component for motor vehicle
EP3447321A1 (en) * 2017-03-14 2019-02-27 Audi Ag Wheel hub rolling bearing assembly for a motor vehicle connected to a constant velocity joint and provided with a sealing device
US11117421B2 (en) 2017-03-14 2021-09-14 Audi Ag Wheel bearing arrangement for a motor vehicle
JP2018162809A (en) * 2017-03-24 2018-10-18 Ntn株式会社 Bearing device for wheel
JP7080015B2 (en) 2017-03-24 2022-06-03 Ntn株式会社 Wheel bearing device
DE102020105299A1 (en) * 2019-12-16 2021-06-17 Schaeffler Technologies AG & Co. KG Sealing arrangement of a wheel bearing
US12049924B2 (en) 2019-12-16 2024-07-30 Schaeffler Technologies AG & Co. KG Sealing arrangement for a wheel bearing

Similar Documents

Publication Publication Date Title
JP5327603B2 (en) Rolling bearing device
JP6603078B2 (en) Wheel bearing device
JP2010091036A (en) Rolling bearing device
JP5836584B2 (en) Wheel bearing device
KR101411615B1 (en) Sealing apparatus and wheel bearing assembly thereof
JP2010106925A (en) Rolling bearing unit
JP2009197975A (en) Bearing apparatus for axle
JP2012207769A (en) Bearing device for wheel
JP2009197884A (en) Wheel bearing device
WO2015005195A1 (en) Roller bearing unit for supporting wheel having seal ring
JP6384036B2 (en) Wheel bearing device
JP6526387B2 (en) Sealing device
JP2012131452A (en) Wheel supporting rolling bearing unit with sealing ring
JP2013032823A (en) Bearing device for wheel
JP6093605B2 (en) Sealing device and rolling bearing device for wheel provided with sealing device
JP2010096217A (en) Rolling bearing device
JP6392531B2 (en) Wheel bearing device
JP2007192392A (en) Bearing device for wheel
WO2018117102A1 (en) Sealing device
JP2007100828A (en) Bearing device for wheel
JP2007187218A (en) Bearing device for wheel
JP2007100844A (en) Bearing device for wheel
JP2007100827A (en) Bearing device for wheel
JP4531541B2 (en) Sealing device
JP2008180277A (en) Sealing device of bearing for wheel