JP2001241434A - Bearing unit for wheel - Google Patents
Bearing unit for wheelInfo
- Publication number
- JP2001241434A JP2001241434A JP2000055408A JP2000055408A JP2001241434A JP 2001241434 A JP2001241434 A JP 2001241434A JP 2000055408 A JP2000055408 A JP 2000055408A JP 2000055408 A JP2000055408 A JP 2000055408A JP 2001241434 A JP2001241434 A JP 2001241434A
- Authority
- JP
- Japan
- Prior art keywords
- unit
- row
- ball
- balls
- diameter
- 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
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Landscapes
- Rolling Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明に係る車輪用軸受ユ
ニットは、自動車の懸架装置に対し車輪を回転自在に支
持する為に利用する。BACKGROUND OF THE INVENTION 1. Field of the Invention The wheel bearing unit according to the present invention is used to rotatably support wheels on an automobile suspension system.
【０００２】[0002]
【従来の技術】自動車の懸架装置に対し車輪を回転自在
に支持する為に、各種構造の車輪用軸受ユニットが使用
されている。乗用車等の一般的な車両の車輪を懸架装置
に対し回転自在に支持する為の車輪用軸受ユニットは、
外輪ユニットと内輪ユニットとを互いに同心に配置する
と共に、このうちの外輪ユニットの内周面に設けた、断
面の曲率半径が互いに同じである複列の外輪軌道と、上
記内輪ユニットの外周面に設けた、断面の曲率半径が互
いに同じである複列の内輪軌道との間に、それぞれ複数
個ずつの玉を、転動自在に設けている。この様な車輪用
軸受ユニットは、上記外輪ユニットと内輪ユニットとの
うちの一方の軌道輪を懸架装置に対し支持すると共に、
これら外輪ユニットと内輪ユニットとのうちの他方の軌
道輪に対し車輪を支持した状態で使用し、この車輪を上
記懸架装置に対し回転自在に支持する。2. Description of the Related Art In order to rotatably support wheels on a suspension system of an automobile, various types of wheel bearing units are used. A wheel bearing unit for rotatably supporting wheels of a general vehicle such as a passenger car with respect to a suspension device,
The outer ring unit and the inner ring unit are arranged concentrically with each other, and provided on the inner peripheral surface of the outer ring unit, a double-row outer ring raceway having the same cross-sectional radius of curvature, and on the outer peripheral surface of the inner ring unit. A plurality of balls are provided in a freely rolling manner between the provided inner ring raceways having the same radius of curvature in cross section. Such a wheel bearing unit supports one of the outer ring unit and the inner ring unit on the suspension device with respect to a suspension device,
The wheel is used in a state where the wheel is supported on the other race of the outer ring unit and the inner ring unit, and the wheel is rotatably supported on the suspension device.
【０００３】[0003]
【発明が解決しようとする課題】車輪用軸受ユニットの
耐久性を確保する為には、各玉の転動面と外輪軌道及び
内輪軌道との当接部に存在する接触楕円が、これら各軌
道の端縁にまで達しない様にする必要がある。上記当接
部が何れかの軌道の端縁にまで達し、上記接触楕円の端
部が欠ける、所謂軌道面の肩部に玉が乗り上げた状態に
なると、この玉の転動面にエッジロードに基づく大きな
面圧が作用し、この転動面に早期剥離等の損傷が発生し
易くなる。In order to ensure the durability of the wheel bearing unit, the contact ellipse existing at the abutting portion between the rolling surface of each ball and the outer raceway and the inner raceway is determined by each of these raceways. It is necessary not to reach the edge of. When the contact portion reaches the edge of any one of the tracks and the end of the contact ellipse is missing, when the ball rides on the shoulder of the so-called track surface, the rolling surface of the ball is edge loaded. A large surface pressure acts on the rolling surface, and damage such as early peeling is likely to occur on the rolling surface.
【０００４】これに対して、車輪用軸受ユニットの使用
時には、車両の急旋回に基づいて発生する横Ｇに伴うモ
ーメント荷重により、各玉の転動面が外輪軌道と内輪軌
道とのうちの一方又は両方の軌道から外れ易くなる。車
輪用軸受ユニットの耐久性を確保する為には、この様な
モーメント荷重に拘らず、上述の様にして発生する早期
剥離を防止する必要がある。この様な、玉の乗り上げに
伴って発生する早期剥離を防止する為には、玉の外径及
び各軌道の曲率半径を大きくして、車輪用軸受ユニット
の負荷容量並びに剛性を向上させ、上記各玉が各軌道の
肩部に乗り上げにくくする事が考えられる。但し、この
場合には、車輪用軸受ユニットが大型化すると共に重量
も増大する為、好ましくない。[0004] On the other hand, when the wheel bearing unit is used, the rolling surface of each ball is caused by one of the outer raceway and the inner raceway due to the moment load accompanying the lateral G generated due to the sharp turning of the vehicle. Or it becomes easy to deviate from both orbits. In order to ensure the durability of the wheel bearing unit, it is necessary to prevent the early peeling that occurs as described above, regardless of the moment load. In order to prevent such early peeling caused by the running of the ball, the outer diameter of the ball and the radius of curvature of each track are increased to improve the load capacity and rigidity of the wheel bearing unit. It is conceivable that each ball hardly gets on the shoulder of each track. However, in this case, the size of the wheel bearing unit increases and the weight increases, which is not preferable.
【０００５】又、実用新案登録第２５０２７７０号公報
には、車輪を取り付ける為のフランジから遠い側の玉の
外径及び軌道の断面の曲率半径を、玉の外径で１〜２ラ
ンク分大きくする構造が記載されている。但し、この様
な構造は、単に大きな負荷が加わる、上記フランジから
遠い側の玉列の負荷容量を大きくするだけで、必ずしも
玉の乗り上げ防止を図るものではない。しかも、玉の外
径及び軌道の断面の曲率半径を、各列毎に大きく異なら
せる分、各列毎に、玉だけでなく、内輪、保持器、シー
ルリング等の部品の共通化を図れなくなり、コストが嵩
む原因となる。本発明の車輪用軸受ユニットは、この様
な事情に鑑みて、小型・軽量且つ低コストで、しかも優
れた耐久性を実現すべく発明したものである。Japanese Utility Model Registration No. 2502770 discloses that the outer diameter of a ball farther from a flange for mounting a wheel and the radius of curvature of a cross section of a track are increased by one or two ranks in outer diameter of the ball. The structure is described. However, such a structure merely increases the load capacity of the row of balls far from the flange to which a large load is applied, but does not necessarily prevent the balls from getting on. Moreover, since the outer diameter of the ball and the radius of curvature of the cross-section of the raceway are greatly different for each row, it is impossible to use not only the ball but also the inner ring, the retainer, the seal ring, and other parts for each row. , Which increases costs. In view of such circumstances, the wheel bearing unit of the present invention has been invented to realize small size, light weight, low cost, and excellent durability.
【０００６】[0006]
【課題を解決するための手段】本発明の車輪用軸受ユニ
ットは、従来から知られている車輪用軸受ユニットと同
様に、互いに断面の曲率半径が同じである複列の外輪軌
道を内周面に有する外輪ユニットと、互いに断面の曲率
半径が同じである複列の内輪軌道を外周面に有する内輪
ユニットと、これら各外輪軌道と内輪軌道との間に複数
個ずつ、アンギュラ型で各列同士の間で方向が逆の（一
般には背面組み合わせ型の）接触角を持たせた状態で転
動自在に設けられた玉とを備える。そして、上記外輪ユ
ニットと内輪ユニットとのうちの一方の軌道輪を懸架装
置に対し支持すると共に、これら外輪ユニットと内輪ユ
ニットとのうちの他方の軌道輪に対し車輪を支持した状
態で使用される。特に、本発明の車輪用軸受ユニットに
於いては、上記複列に配置された玉のうち、上記車輪を
設けた自動車の旋回走行時に当該玉が対向する軌道の肩
部に乗り上げ易くなる列を構成する玉の径を、他の列を
構成する玉の径よりも僅かに大きくしている。The wheel bearing unit according to the present invention comprises a double-row outer ring raceway having the same cross-sectional radius of curvature as the conventionally known wheel bearing unit. And an inner ring unit having on its outer peripheral surface a double row of inner ring raceways having the same cross-sectional radius of curvature, and a plurality of each between the outer raceway and the inner raceway, each of which is an angular type. And a ball that is provided so as to roll freely with a contact angle in the opposite direction (generally a back-to-back combination type). Then, one of the outer ring units and the inner ring unit is supported by the suspension device, and the other outer ring unit and the inner ring unit are used while the wheels are supported by the other one of the inner ring units. . In particular, in the wheel bearing unit of the present invention, among the balls arranged in the above-mentioned double row, a row in which the ball is easy to ride on a shoulder of a track facing the same when the vehicle provided with the wheels makes a cornering turn. The diameters of the constituent balls are slightly larger than the diameters of the balls forming the other rows.
【０００７】自動車の旋回走行時に当該玉が対向する軌
道の肩部に乗り上げ易くなる列とは、具体的には、懸架
装置に対し支持する一方の軌道輪が外輪ユニットであ
り、車輪を支持する他方の軌道輪が内輪ユニットである
場合には、車両への組み付け状態でこの車両の幅方向外
側の列である。そこで、この様な場合には、この幅方向
外側の列を構成する玉の径を、幅方向内側の玉の径より
も僅かに大きくする。これに対して、懸架装置に対し支
持する一方の軌道輪が内輪ユニットであり、車輪を支持
する他方の軌道輪が外輪ユニットである場合には、車両
への組み付け状態でこの車両の幅方向内側の列が、自動
車の旋回走行時に当該玉が対向する軌道の肩部に乗り上
げ易くなる列である。そこで、この様な場合には、上記
幅方向内側の列を構成する玉の径を、幅方向外側の玉の
径よりも僅かに大きくする。[0007] The row in which the ball easily rides on the shoulder of the opposing track when the vehicle turns is specifically, one of the track rings supported by the suspension device is an outer ring unit, and supports the wheels. When the other race is an inner race unit, it is an outer row in the width direction of the vehicle when assembled to the vehicle. Therefore, in such a case, the diameter of the balls constituting the outer row in the width direction is made slightly larger than the diameter of the balls in the inner width direction. On the other hand, when one of the bearing rings supporting the suspension device is an inner ring unit and the other bearing ring supporting the wheels is an outer ring unit, the inner side of the vehicle in the width direction of the vehicle when assembled to the vehicle. Is a row that makes it easier to get on the shoulder of the track facing the ball when the car turns. Therefore, in such a case, the diameter of the balls forming the inner row in the width direction is slightly larger than the diameter of the outer balls in the width direction.
【０００８】[0008]
【作用】複列に設けた内輪軌道及び外輪軌道の断面の曲
率半径を同じとして、これら両列を構成する玉の外径を
異ならせた場合、外径が大きい玉の接触角は、同じく小
さい玉の接触角に比べて小さくなる。そして、外径が大
きい玉の転動面と外輪軌道及び内輪軌道との接触部に存
在する接触楕円の位置は、接触角が小さい分だけ、これ
ら各軌道の肩部から離れた位置に存在する事になる。こ
の為、走行時に発生するモーメント荷重により、上記接
触楕円が上記各軌道の肩部に向けて移動しても、この接
触楕円が欠けにくくなる。言い換えれば、上記各玉の転
動面と上記外輪軌道及び内輪軌道との接触部が、これら
各軌道の端縁にまで達しにくくなって、上記各玉の転動
面にエッジロードに基づく過大な面圧が作用しにくくな
る。この結果、これら各玉の転動面の転がり疲れ寿命を
確保して、車輪用軸受ユニットの耐久性確保を図れる。
しかも、各列の玉の外径の相違は僅かであり、外輪軌道
及び内輪軌道の断面の曲率半径は、各列同士の間で互い
に等しい為、玉以外の、内輪、保持器、シールリング等
の部品の各列同士の間での共通化を図れ、コスト上昇を
抑える事ができる。When the outer diameters of the balls constituting both rows are made different by making the cross-sectional radii of the inner raceway and the outer raceway provided in the double row the same, the contact angle of the ball having the larger outer diameter is also small. It becomes smaller than the contact angle of the ball. And the position of the contact ellipse existing at the contact portion between the rolling surface of the ball having a large outer diameter and the outer raceway and the inner raceway is located at a position away from the shoulder of each of these raceways by the smaller contact angle. Will be. Therefore, even if the contact ellipse moves toward the shoulder of each of the tracks due to the moment load generated during traveling, the contact ellipse is less likely to be chipped. In other words, the contact portion between the rolling surface of each ball and the outer raceway and the inner raceway becomes difficult to reach the edges of these raceways, and the rolling surface of each ball becomes excessively large based on the edge load. Surface pressure is less likely to act. As a result, the rolling fatigue life of the rolling surfaces of these balls can be ensured, and the durability of the wheel bearing unit can be ensured.
In addition, the difference in the outer diameter of the balls in each row is small, and the radii of curvature of the cross-sections of the outer raceway and the inner raceway are equal to each other between the rows. Can be shared among the rows of parts, and an increase in cost can be suppressed.
【０００９】[0009]
【発明の実施の形態】図１は、本発明の実施の形態の第
１例を示している。本例は、懸架装置に対し支持固定す
るハウジング１の内径側に、車輪を支持固定する為のハ
ブ２を、１対の単列玉軸受３ａ、３ｂにより回転自在に
支持する車輪用軸受ユニット４に、本発明を適用する場
合に就いて示している。上記各単列玉軸受３ａ、３ｂを
構成する外輪５、５は上記ハウジング１に内嵌固定して
外輪ユニット６を構成し、同じく内輪７、７は上記ハブ
２に外嵌固定して内輪ユニット８を構成している。そし
て、上記各外輪５、５の内周面に設けた外輪軌道９、９
と、上記各内輪７、７の外周面に設けた内輪軌道１０、
１０との間に、それぞれ玉１１ａ、１１ｂを複数個ずつ
設けて、上記外輪ユニット６の内径側に上記内輪ユニッ
ト８を、回転自在に支持している。FIG. 1 shows a first embodiment of the present invention. In this example, a wheel bearing unit 4 for rotatably supporting a hub 2 for supporting and fixing wheels on a radially inner side of a housing 1 for supporting and fixing the suspension unit by a pair of single row ball bearings 3a and 3b. Next, the case where the present invention is applied is shown. The outer races 5, 5 constituting the single row ball bearings 3a, 3b are internally fitted and fixed to the housing 1 to constitute an outer race unit 6, and the inner races 7, 7 are externally fitted and fixed to the hub 2 similarly. 8. The outer raceways 9, 9 provided on the inner peripheral surface of each of the outer races 5, 5
An inner ring raceway 10 provided on the outer peripheral surface of each of the inner rings 7, 7;
10, a plurality of balls 11a and 11b are provided, respectively, and the inner ring unit 8 is rotatably supported on the inner diameter side of the outer ring unit 6.
【００１０】又、この外輪ユニット６を構成するハブ２
のうち、車両への組み付け状態で幅方向外側（図１の右
側）となる外端部には、このハブ２に車輪を支持する為
のフランジ１２を固設すると共に、このフランジ１２
に、ディスクブレーキを構成する為のロータ１３を結合
固定している。Further, the hub 2 constituting the outer ring unit 6
Of these, a flange 12 for supporting wheels is fixedly mounted on the hub 2 at an outer end portion which is located on the outer side in the width direction (right side in FIG. 1) in an assembled state with the vehicle.
Further, a rotor 13 for constituting a disc brake is connected and fixed.
【００１１】上述の様な車輪用軸受ユニット４の基本構
成に就いては、従来から知られているものであるが、本
例の車輪用軸受ユニット４の場合には、幅方向外側の列
となる、一方（図１の右方）の単列玉軸受３ａを構成す
る玉１１ａ、１１ａの径を、幅方向内側の列となる、他
方（図１の左方）の単列玉軸受３ｂを構成する玉１１
ｂ、１１ｂの径よりも僅かに（同一ランク内で数ケージ
程度＝１０〜２０μｍ程度）大きくしている。この様
に、玉１１ａ、１１ｂの径を各列毎に異ならせるが、こ
れら各玉１１ａ、１１ｂの転動面が転がり接触する、前
記各外輪軌道９、９及び前記各内輪軌道１０、１０の断
面の曲率半径は、各列同士の間で互いに等しい。但し、
各外輪軌道９、９の断面の曲率半径と各内輪軌道１０、
１０の断面の曲率半径とは、必ずしも等しくするとは限
らない。各外輪軌道９、９と各内輪軌道１０、１０との
転がり疲れ寿命に差が出ない様に、各外輪軌道９、９の
断面の曲率半径を、各内輪軌道１０、１０の断面の曲率
半径よりも少しだけ大きくする等は自由である。The basic configuration of the wheel bearing unit 4 as described above is conventionally known. However, in the case of the wheel bearing unit 4 of this embodiment, the outer row in the width direction is The diameter of the balls 11a, 11a constituting one (the right-hand side in FIG. 1) single-row ball bearing 3a is set to the width-wise inner row, and the other (the left-hand side in FIG. 1) single-row ball bearing 3b. Constituting ball 11
The diameters are slightly larger than the diameters of b and 11b (about several cages within the same rank = about 10 to 20 μm). In this way, the diameters of the balls 11a, 11b are different for each row, but the rolling surfaces of the balls 11a, 11b are in rolling contact with the outer raceways 9, 9 and the inner raceways 10, 10. The radii of curvature of the cross sections are equal between each row. However,
The radius of curvature of the cross section of each outer raceway 9, 9 and each inner raceway 10,
The radius of curvature of the section 10 is not always equal. The radius of curvature of the cross-section of each outer ring raceway 9, 9 is set to the radius of curvature of the cross-section of each inner raceway 10, 10 so that there is no difference in the rolling fatigue life between each outer raceway 9, 9 and each inner raceway 10, 10. It is free to increase the size slightly.
【００１２】上述の様に構成する本例の車輪用転がり軸
受ユニットの場合は、次の様な作用により、上記各玉１
１ａ、１１ｂの転動面が、上記各外輪軌道９、９及び上
記各内輪軌道１０、１０から外れるのを防止できる。即
ち、複列に設けた内輪軌道１０、１０及び外輪軌道９、
９の断面の曲率半径を同じとして、これら両列を構成す
る玉１１ａ、１１ｂの外径を異ならせた場合、図２に示
す様に、外径が大きい玉１１ａ、１１ａの接触角は、同
じく小さい玉１１ｂ、１１ｂの接触角に比べて小さくな
る。In the case of the rolling bearing unit for a wheel of the present embodiment configured as described above, each of the balls 1 is operated by the following operation.
The rolling surfaces 1a and 11b can be prevented from coming off the outer raceways 9 and the inner raceways 10 and 10. That is, the inner ring raceways 10, 10 and the outer raceway 9, provided in a double row,
When the outer diameters of the balls 11a and 11b constituting these two rows are made different with the same radius of curvature of the cross-section of No. 9 as shown in FIG. 2, the contact angles of the balls 11a and 11a having a larger outer diameter are the same. It becomes smaller than the contact angle of the small balls 11b, 11b.
【００１３】そして、この様に接触角が小さくなる分、
外径が大きい玉１１ａ、１１ａの転動面と外輪軌道９及
び内輪軌道１０との接触部に存在する接触楕円の位置
は、これら各軌道９、１０の肩部から離れた、これら各
軌道９、１０の中央寄り位置に存在する事になる。この
為、走行時に発生するモーメント荷重により、上記接触
楕円が上記各軌道９、１０の肩部に向けて移動しても、
この接触楕円が欠けにくくなる。言い換えれば、上記各
玉１１ａ、１１ａの転動面と上記外輪軌道９及び内輪軌
道１０との接触部が、これら各軌道９、１０の端縁にま
で達しにくくなって、上記各玉１１ａ、１１ａの転動面
にエッジロードに基づく過大な面圧が作用しにくくな
る。この結果、これら各玉１１ａ、１１ａの転動面の転
がり疲れ寿命を確保して、前記車輪用軸受ユニット４全
体としての耐久性確保を図れる。例えば、本発明者の試
算によると、図３に示す様に、一般の乗用車用の軸受ユ
ニットの場合、玉１１ａ、１１ａの外径を１０〜２０μ
ｍ程度大きくする事により、この玉１１ａ、１１ａの転
動面が上記各軌道９、１０の肩部に乗り上げにくくなる
事が確認された。[0013] Then, as the contact angle becomes smaller,
The positions of the contact ellipses existing at the contact portions between the rolling surfaces of the balls 11a, 11a having a large outer diameter and the outer raceway 9 and the inner raceway 10 are separated from the shoulders of the raceways 9, 10 by the respective raceways 9. , It will be located at the center position of 10. Therefore, even if the contact ellipse moves toward the shoulder of each of the tracks 9 and 10 due to the moment load generated during traveling,
This contact ellipse is less likely to be chipped. In other words, the contact portions between the rolling surfaces of the balls 11a, 11a and the outer raceway 9 and the inner raceway 10 are less likely to reach the edges of the raceways 9, 10 and the balls 11a, 11a Excessive surface pressure based on the edge load is less likely to act on the rolling surface. As a result, the rolling fatigue life of the rolling surfaces of the balls 11a, 11a is ensured, and the durability of the wheel bearing unit 4 as a whole can be ensured. For example, according to trial calculations by the inventor, as shown in FIG. 3, in the case of a bearing unit for a general passenger car, the outer diameter of the balls 11a, 11a is 10 to 20 μm.
It has been confirmed that by increasing the diameter by about m, the rolling surfaces of the balls 11a, 11a are unlikely to ride on the shoulders of the tracks 9, 10.
【００１４】これに対して、走行時に発生するモーメン
ト荷重に拘らず、玉１１ｂ、１１ｂの転動面が上記各軌
道９、１０の肩部に乗り上げにくい、車両への組み付け
状態で幅方向内側（図１の左側）の単列玉軸受３ｂを構
成する玉１１ｂ、１１ｂの径は、特に大きくしていな
い。この為、この単列玉軸受３ｂの接触角を大きくし
て、上記車輪用軸受ユニット４に必要とされる、スラス
ト方向の負荷容量の確保を図れる。しかも、各列とな
る、１対の単列玉軸受３ａ、３ｂを構成する玉１１ａ、
１１ｂの外径の相違は僅かであり、これら両端列玉軸受
３ａ、３ｂの外輪軌道９、９及び内輪軌道１０、１０の
断面の曲率半径は、各列同士の間で互いに等しい。この
為、玉１１ａ、１１ｂ以外の、内輪、保持器、シールリ
ング等の部品の共通化を図れ、コスト上昇を抑える事が
できる。On the other hand, irrespective of the moment load generated during running, the rolling surfaces of the balls 11b, 11b are difficult to ride on the shoulders of the tracks 9, 10, and the inner side in the width direction when mounted on the vehicle ( The diameters of the balls 11b, 11b constituting the single-row ball bearing 3b (left side in FIG. 1) are not particularly large. Therefore, the contact angle of the single-row ball bearing 3b can be increased to secure a load capacity in the thrust direction required for the wheel bearing unit 4. Moreover, the balls 11a constituting the pair of single-row ball bearings 3a, 3b in each row,
The difference in the outer diameter of 11b is slight, and the cross-sectional radii of curvature of the outer raceways 9, 9 and the inner raceways 10, 10 of these double-ended row ball bearings 3a, 3b are equal to each other between the rows. For this reason, components other than the balls 11a and 11b, such as the inner ring, the retainer, and the seal ring, can be shared, and a cost increase can be suppressed.
【００１５】次に、図４は、本発明の実施の形態の第２
例として、本発明を独立式の懸架装置に組み付ける、従
動輪用の車輪用軸受ユニットに適用した場合に就いて示
している。この様な本例の場合には、ハブ２ａに内輪７
ａを外嵌固定して、その外周面に複列の内輪軌道１０、
１０を有する内輪ユニット８ａを構成している。又、単
体で構成した外輪ユニット６ａは、その外周面に、この
外輪ユニット６ａを懸架装置に対し結合固定する為の取
付部１４を、内周面に複列の外輪軌道９、９を、それぞ
れ有する。この様な本例の場合も、車両への組み付け状
態で幅方向外側（図４の左側）の列を構成する玉１１ａ
の径を、同じく内側（図４の右側）の列を構成する玉１
１ｂの径よりも僅かに大きくしている。その他の構成及
び作用は、上述した第１例の場合と同様である。FIG. 4 shows a second embodiment of the present invention.
As an example, a case is shown in which the present invention is applied to a wheel bearing unit for a driven wheel, which is assembled into an independent suspension device. In the case of such an example, the inner ring 7 is attached to the hub 2a.
a is externally fitted and fixed to the outer peripheral surface thereof,
An inner ring unit 8a having the number 10 is formed. The outer ring unit 6a formed as a single unit has, on its outer peripheral surface, a mounting portion 14 for coupling and fixing the outer ring unit 6a to a suspension device, and a plurality of rows of outer ring raceways 9, 9 on its inner peripheral surface. Have. Also in the case of such a present example, the balls 11a constituting the row on the outer side in the width direction (the left side in FIG. 4) when assembled to the vehicle.
The diameter of the ball 1 which also constitutes the inner row (right side in FIG. 4)
The diameter is slightly larger than 1b. Other configurations and operations are the same as those of the above-described first example.
【００１６】次に、図５は、本発明の実施の形態の第３
例として、本発明を独立式の懸架装置に組み付ける、駆
動輪用の車輪用軸受ユニットに適用した場合に就いて示
している。この様な本例の場合には、中心部に等速ジョ
イントの駆動軸を挿入する為のスプライン孔１５を形成
したハブ２ｂに内輪７ａを外嵌固定して、その外周面に
複列の内輪軌道１０、１０を有する内輪ユニット８ｂを
構成している。この様な本例の場合も、車両への組み付
け状態で幅方向外側（図５の左側）の列を構成する玉１
１ａ、１１ａの径を、同じく内側（図５の右側）の列を
構成する玉１１ｂ、１１ｂの径よりも僅かに大きくして
いる。その他の構成及び作用は、上述した第２例の場合
と同様である。FIG. 5 shows a third embodiment of the present invention.
As an example, a case is shown in which the present invention is applied to a wheel bearing unit for driving wheels, which is assembled into an independent suspension device. In the case of this example, the inner ring 7a is externally fixed to a hub 2b having a spline hole 15 for inserting a drive shaft of a constant velocity joint at the center, and a double-row inner ring is formed on the outer peripheral surface thereof. An inner ring unit 8b having the tracks 10, 10 is configured. Also in the case of such a present example, the balls 1 constituting the row on the outer side in the width direction (the left side in FIG. 5) in an assembled state to the vehicle.
The diameters of the balls 1a and 11a are slightly larger than the diameters of the balls 11b and 11b constituting the inner row (right side in FIG. 5). Other configurations and operations are the same as those of the above-described second example.
【００１７】次に、図６は、本発明の実施の形態の第４
例として、本発明を独立式の懸架装置に組み付ける、駆
動輪用の車輪用軸受ユニットに適用した場合に就いて示
している。この様な本例の場合には、等速ジョイントの
駆動軸１６の外周面にスプライン係合させたハブ２ｃの
外周面に１対の内輪７ｂ、７ｂを外嵌固定する事により
内輪ユニット８ｂを構成している。この様な本例の場合
も、車両への組み付け状態で幅方向外側（図６の左側）
の列を構成する玉１１ａの径を、同じく内側（図６の右
側）の列を構成する玉１１ｂの径よりも僅かに大きくし
ている。その他の構成及び作用は、上述した第３例の場
合と同様である。FIG. 6 shows a fourth embodiment of the present invention.
As an example, a case is shown in which the present invention is applied to a wheel bearing unit for driving wheels, which is assembled into an independent suspension device. In the case of such an example, the inner ring unit 8b is fixed by externally fitting the pair of inner rings 7b, 7b to the outer peripheral surface of the hub 2c that is spline-engaged with the outer peripheral surface of the drive shaft 16 of the constant velocity joint. Make up. In the case of this embodiment as well, the outer side in the width direction (left side in FIG. 6) in an assembled state to the vehicle.
Is slightly larger than the diameter of the balls 11b that also form the inner row (right side in FIG. 6). Other configurations and operations are the same as those of the above-described third example.
【００１８】次に、図７は、本発明の実施の形態の第５
例として、本発明を、非独立式の懸架装置に組み付け
る、従動輪用の車輪用軸受に適用した場合に就いて示し
ている。この様な本例の場合には、１対の内輪７ｃ、７
ｃを組み合わせて内輪ユニット８ｃを構成し、その外周
面に車輪を取り付ける為のフランジ１２ａを有するハブ
２ｄの内周面に複列の外輪軌道９、９を設けている。こ
の様な本例の場合は、上述した各例の場合とは逆に、車
両への組み付け状態で幅方向内側（図７の右側）の列を
構成する玉１１ａの径を、同じく外側（図７の左側）の
列を構成する玉１１ｂの径よりも僅かに大きくしてい
る。その他の構成及び作用は、上述した各例の場合と同
様である。Next, FIG. 7 shows a fifth embodiment of the present invention.
By way of example, the present invention is shown for a case where the present invention is applied to a wheel bearing for a driven wheel to be mounted on a non-independent suspension device. In the case of such a present example, a pair of inner rings 7c, 7
The inner ring unit 8c is formed by combining the outer ring raceways 9c with a double row of outer ring raceways 9 on the inner peripheral surface of a hub 2d having a flange 12a for attaching wheels to the outer peripheral surface thereof. In the case of such an example, the diameter of the balls 11a constituting the row on the inner side in the width direction (the right side in FIG. 7) in the assembled state to the vehicle is similarly changed to the outer side (FIG. (Left side of 7) is slightly larger than the diameter of the balls 11b constituting the row. Other configurations and operations are the same as those in the above-described examples.
【００１９】次に、図８〜９は、本発明の実施の形態の
第６〜７例を示している。これら各例の場合には、１対
の内輪７ｃ、７ｃを組み合わせて内輪ユニット８ｃを構
成し、ハウジング等の内側に内嵌固定自在な外輪５ａの
内周面に複列の外輪軌道９、９を設けている。この様な
各例の場合も、内輪ユニット８ｃと外輪５ａとのうちの
何れが回転するかにより、何れかの列を構成する玉１１
ａ（又は１１ｂ）の径を、他の列を構成する玉１１ｂ
（又は１１ａ）の径よりも僅かに大きくしている。この
様な各例の場合には、車両への組み付け以前の状態で
は、何れの側が、径の大きな玉を組み込んだものかの見
分けが付かなくなる。そこで、図８に示した第６例の場
合には、軸方向両端側でシール板１７ａ、１７ｂの形式
を互いに異ならせる事により、図９に示した第７例の場
合には、外輪５ａの一端部外周面に凹溝１８を形成する
事により、上記見分けを付けられる様にしている。Next, FIGS. 8 and 9 show sixth and seventh examples of the embodiment of the present invention. In each of these examples, a pair of inner races 7c, 7c are combined to form an inner race unit 8c, and double rows of outer raceways 9, 9 are formed on an inner peripheral surface of an outer race 5a that can be fitted and fixed inside a housing or the like. Is provided. Also in each of such examples, the balls 11 constituting any row depend on which of the inner wheel unit 8c and the outer wheel 5a rotates.
The diameter of a (or 11b) is changed to a ball 11b constituting another row.
(Or 11a) is slightly larger. In the case of each of such examples, it is impossible to distinguish which side incorporates a ball having a large diameter in a state before assembly to a vehicle. Therefore, in the case of the sixth example shown in FIG. 8, the types of the seal plates 17a and 17b are made different from each other at both ends in the axial direction, so that in the case of the seventh example shown in FIG. By forming a concave groove 18 on the outer peripheral surface of one end, the above distinction can be made.
【００２０】[0020]
【発明の効果】本発明は、以上に述べた通り構成され作
用するので、小型・軽量且つ低コストで、しかも優れた
耐久性を有する車輪用軸受ユニットを実現できる。Since the present invention is constructed and operates as described above, it is possible to realize a wheel bearing unit having a small size, light weight, low cost and excellent durability.
【図１】本発明の実施の形態の第１例を示す断面図。FIG. 1 is a sectional view showing a first example of an embodiment of the present invention.
【図２】玉の外径が接触角に及ぼす影響を示す線図。FIG. 2 is a diagram showing the effect of the outer diameter of a ball on the contact angle.
【図３】玉の外径が、軌道の肩部への乗り上げ状態の改
善に及ぼす影響を示す線図。FIG. 3 is a diagram showing an influence of an outer diameter of a ball on an improvement in a state of riding on a shoulder of a track.
【図４】本発明の実施の形態の第２例を示す半部断面
図。FIG. 4 is a half sectional view showing a second example of the embodiment of the present invention.
【図５】同第３例を示す断面図。FIG. 5 is a sectional view showing a third example.
【図６】同第４例を示す半部断面図。FIG. 6 is a half sectional view showing the fourth example.
【図７】同第５例を示す半部断面図。FIG. 7 is a half sectional view showing the fifth example.
【図８】同第６例を示す部分断面図。FIG. 8 is a partial sectional view showing the sixth example.
【図９】同第７例を示す部分断面図。FIG. 9 is a partial cross-sectional view showing the seventh example.
１ ハウジング ２、２ａ、２ｂ、２ｃ、２ｄ ハブ ３ａ、３ｂ 単列玉軸受 ４ 車輪用軸受ユニット ５、５ａ 外輪 ６、６ａ 外輪ユニット ７、７ａ、７ｂ、７ｃ 内輪 ８、８ａ、８ｂ、８ｃ 内輪ユニット ９ 外輪軌道 １０ 内輪軌道 １１ａ、１１ｂ 玉 １２、１２ａ フランジ １３ ロータ １４ 取付部 １５ スプライン孔 １６ 駆動軸 １７ａ、１７ｂ シール板 １８ 凹溝 DESCRIPTION OF SYMBOLS 1 Housing 2, 2a, 2b, 2c, 2d Hub 3a, 3b Single row ball bearing 4 Wheel bearing unit 5, 5a Outer ring 6, 6a Outer ring unit 7, 7a, 7b, 7c Inner ring 8, 8a, 8b, 8c Inner ring unit 9 Outer raceway 10 Inner raceway 11a, 11b Ball 12, 12a Flange 13 Rotor 14 Attachment part 15 Spline hole 16 Drive shaft 17a, 17b Seal plate 18 Concave groove
Claims (3)
の外輪軌道を内周面に有する外輪ユニットと、互いに断
面の曲率半径が同じである複列の内輪軌道を外周面に有
する内輪ユニットと、これら各外輪軌道と内輪軌道との
間に複数個ずつ、アンギュラ型で各列同士の間で方向が
逆の接触角を持たせた状態で転動自在に設けられた玉と
を備え、上記外輪ユニットと内輪ユニットとのうちの一
方の軌道輪を懸架装置に対し支持すると共に、これら外
輪ユニットと内輪ユニットとのうちの他方の軌道輪に対
し車輪を支持した状態で使用される車輪用軸受ユニット
に於いて、上記複列に配置された玉のうち、上記車輪を
設けた自動車の旋回走行時に当該玉が対向する軌道の肩
部に乗り上げ易くなる列を構成する玉の径を、他の列を
構成する玉の径よりも僅かに大きくした事を特徴とする
車輪用軸受ユニット。1. An outer ring unit having, on its inner peripheral surface, a double row of outer raceways having the same cross-sectional radius of curvature, and an inner ring unit having a double-row inner raceway having the same cross-sectional radius of curvature on its outer peripheral surface. And, between each of these outer ring raceway and the inner ring raceway, a plurality of balls provided in a rollable manner in a state of having a contact angle of the opposite direction between each row in an angular type, For a wheel used while supporting one of the outer ring units and the inner ring unit to the suspension device and supporting the wheels to the other of the outer ring unit and the inner ring unit. In the bearing unit, among the balls arranged in the double row, the diameter of a ball constituting a row that facilitates riding on a shoulder portion of a track on which the ball faces when the vehicle provided with the wheels makes a turning motion, From the diameter of the balls that make up the row A bearing unit for wheels, characterized by a slightly larger size.
外輪ユニットであり、車輪を支持する他方の軌道輪が内
輪ユニットであり、車両への組み付け状態でこの車両の
幅方向外側の列を構成する玉の径が、幅方向内側の玉の
径よりも僅かに大きい、請求項１に記載した車輪用軸受
ユニット。2. One of the races that supports the suspension device is an outer race unit, and the other race that supports the wheels is an inner race unit. The bearing unit for a wheel according to claim 1, wherein the diameter of the ball to be configured is slightly larger than the diameter of the ball inside in the width direction.
内輪ユニットであり、車輪を支持する他方の軌道輪が外
輪ユニットであり、車両への組み付け状態でこの車両の
幅方向内側の列を構成する玉の径が、幅方向外側の玉の
径よりも僅かに大きい、請求項１に記載した車輪用軸受
ユニット。3. One of the races supporting the suspension device is an inner race unit, and the other race supporting the wheels is an outer race unit. The wheel bearing unit according to claim 1, wherein a diameter of a constituent ball is slightly larger than a diameter of a ball outside in a width direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000055408A JP2001241434A (en) | 2000-03-01 | 2000-03-01 | Bearing unit for wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000055408A JP2001241434A (en) | 2000-03-01 | 2000-03-01 | Bearing unit for wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001241434A true JP2001241434A (en) | 2001-09-07 |
Family
ID=18576533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000055408A Pending JP2001241434A (en) | 2000-03-01 | 2000-03-01 | Bearing unit for wheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001241434A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004308792A (en) * | 2003-04-07 | 2004-11-04 | Ts Corporation | Double row integral angular bearing and gearing device using the same |
-
2000
- 2000-03-01 JP JP2000055408A patent/JP2001241434A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004308792A (en) * | 2003-04-07 | 2004-11-04 | Ts Corporation | Double row integral angular bearing and gearing device using the same |
| JP4515039B2 (en) * | 2003-04-07 | 2010-07-28 | ナブテスコ株式会社 | Gear unit using double-row integrated angular bearing |
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