JP5141114B2 - Rolling bearing unit for wheel support - Google Patents

Rolling bearing unit for wheel support Download PDF

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Publication number
JP5141114B2
JP5141114B2 JP2007179334A JP2007179334A JP5141114B2 JP 5141114 B2 JP5141114 B2 JP 5141114B2 JP 2007179334 A JP2007179334 A JP 2007179334A JP 2007179334 A JP2007179334 A JP 2007179334A JP 5141114 B2 JP5141114 B2 JP 5141114B2
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Prior art keywords
outer ring
wheel
supporting
flange
rolling bearing
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JP2009012699A5 (en
JP2009012699A (en
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康誉 鈴木
成人 大竹
徹 竹原
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NSK Ltd
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NSK Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/522—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to load on the bearing, e.g. bearings with load sensors or means to protect the bearing against overload
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
    • 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

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

Description

この発明は、自動車の車輪並びにディスクブレーキを構成するディスクを懸架装置に対して回転自在に支持すると共に、このディスクブレーキを構成するキャリパ又はサポートを支持する車輪支持用転がり軸受ユニットの改良に関する。   The present invention relates to an improvement in a wheel bearing rolling bearing unit that supports a wheel of an automobile and a disk constituting a disk brake rotatably with respect to a suspension device and supports a caliper or a support constituting the disk brake.

自動車の車輪を構成するホイール及びディスクブレーキを構成するディスクは、懸架装置を構成するナックルに対し、車輪支持用転がり軸受ユニットにより回転自在に支持する。一方、上記ディスクブレーキを構成するキャリパ又はサポートは、上記ナックルに支持固定するのが一般的である。これに対して、近年、自動車への組み付け性や取り扱い性を向上させる観点より、上記キャリパ又はサポートを、車輪支持用転がり軸受ユニットを構成する静止側部材に支持固定する事が考えられている。例えば特許文献１には、車輪支持用転がり軸受ユニットを構成する静止側部材である外輪の外周面に、上記キャリパ又はサポートを支持固定する為のフランジを設けた構造が記載されている。   A wheel constituting a wheel of an automobile and a disc constituting a disc brake are rotatably supported by a knuckle constituting a suspension device by a wheel bearing rolling bearing unit. On the other hand, a caliper or a support constituting the disc brake is generally supported and fixed to the knuckle. On the other hand, in recent years, it has been considered to support and fix the caliper or the support to a stationary member constituting the wheel bearing rolling bearing unit from the viewpoint of improving the ease of assembly and handling to an automobile. For example, Patent Document 1 describes a structure in which a flange for supporting and fixing the caliper or support is provided on the outer peripheral surface of an outer ring, which is a stationary member constituting a wheel support rolling bearing unit.

図５〜６は、上記特許文献１に記載された公知の構造とは異なるが、本発明者が先に考えた、静止側部材の外周面に上記キャリパ又はサポートを支持固定する為のフランジを設けた車輪支持用転がり軸受ユニットの１例を示している。この車輪支持用転がり軸受ユニットは、静止側部材である外輪１と、回転側部材であるハブ２と、それぞれが転動体である複数個の玉３、３とを備える。このうちの外輪１は、内周面に複列の外輪軌道４ａ、４ｂを有する。又、外周面の内端（軸方向に関して「内」とは、自動車への組み付け状態で車両の幅方向中央側を言い、図１、図３、図５の右側。反対に、車両の幅方向外側となる、図１、図３、図５の左側を、軸方向に関して「外」と言う。本明細書及び特許請求の範囲の全体で同じ。）寄り部分に、上記ナックル（図示せず）に結合固定する為の結合フランジ５を、同じく中間部（この結合フランジ５の軸方向外側に隣接する部分）の円周方向一部に、上記キャリパ又はサポート（図示せず）を支持固定する為の外輪側支持フランジ６を、それぞれ有する。 Although FIGS. 5-6 differ from the well-known structure described in the said patent document 1, the flange for supporting and fixing the said caliper or support to the outer peripheral surface of the stationary side member which the present inventor considered previously is shown. An example of the provided wheel bearing rolling bearing unit is shown. This wheel-supporting rolling bearing unit includes an outer ring 1 that is a stationary member, a hub 2 that is a rotating member, and a plurality of balls 3 and 3 each of which is a rolling element. Out of these, the outer ring 1 has double-row outer ring raceways 4a and 4b on the inner peripheral surface. In addition, the inner end of the outer peripheral surface ("inner" with respect to the axial direction means the center side in the width direction of the vehicle in the state of being mounted on the automobile, and is the right side of FIGS . 1, 3, and 5 . The outer left side of FIGS . 1, 3, and 5 is referred to as “outside” with respect to the axial direction.This is the same throughout the present specification and claims.) In order to support and fix the caliper or support (not shown) to a part of the circumferential direction of the intermediate portion (a portion adjacent to the outside of the connecting flange 5 in the axial direction). The outer ring side support flanges 6 are respectively provided.

又、上記ハブ２は、ハブ本体７と、このハブ本体７の内端部に外嵌固定した内輪８とから成る。この様なハブ２は、外周面の外端寄り部分に上記ホイール及びディスク９を支持固定する為の回転側支持フランジ１０を、同じく中間部乃至内端部に複列の内輪軌道１１ａ、１１ｂを、それぞれ有する。尚、このうちの回転側支持フランジ１０及び外側の内輪軌道１１ａは、上記ハブ本体７の外周面に、内側の内輪軌道１１ｂは上記内輪８の外周面に、それぞれ形成している。又、上記回転側支持フランジ１０の円周方向複数個所には、それぞれ当該個所を軸方向に貫通する圧入孔１２を設けると共に、これら各圧入孔１２、１２の内側にそれぞれスタッド１３を圧入固定している。又、上記各玉３、３は、上記各外輪軌道４ａ、４ｂと上記各内輪軌道１１ａ、１１ｂとの間にそれぞれ複数個ずつ、転動自在に設けている。尚、図示の例では、転動体として上記各玉３、３を使用しているが、重量が嵩む自動車用の転がり軸受ユニットの場合には、転動体として円すいころを使用する場合もある。   The hub 2 includes a hub body 7 and an inner ring 8 that is fitted and fixed to the inner end of the hub body 7. Such a hub 2 has a rotation-side support flange 10 for supporting and fixing the wheel and the disk 9 at a portion near the outer end of the outer peripheral surface, and double row inner ring raceways 11a and 11b at the middle to the inner end. Respectively. Of these, the rotation side support flange 10 and the outer inner ring raceway 11 a are formed on the outer peripheral surface of the hub body 7, and the inner inner ring raceway 11 b is formed on the outer peripheral surface of the inner ring 8. In addition, press-fitting holes 12 penetrating in the axial direction are provided at a plurality of locations in the circumferential direction of the rotation-side support flange 10, and studs 13 are press-fitted and fixed inside the press-fitting holes 12 and 12, respectively. ing. Further, a plurality of balls 3, 3 are provided between the outer ring raceways 4a, 4b and the inner ring raceways 11a, 11b, respectively, so that they can roll. In the illustrated example, each of the balls 3 and 3 is used as a rolling element. However, in the case of a rolling bearing unit for an automobile that is heavy in weight, a tapered roller may be used as the rolling element.

上述の様に構成する車輪支持用転がり軸受ユニットを自動車に組み付ける場合には、前記結合フランジ５の内側面を前記ナックルの外側面に接触させた状態で、この結合フランジ５をこのナックルに結合固定する。又、上記回転側支持フランジ１０の外側面である回転側取付面１４に、上記ディスク９の片側面内径寄り部分を接触させた状態で、上記回転側支持フランジ１０にこのディスク９及び上記ホイールを、上記複数のスタッド１３とナット（図示せず）とにより支持固定する。又、上記ディスクブレーキがフローティングキャリパ型である場合には、キャリパを支持するサポートを、上記ディスクブレーキが対向ピストン型である場合にはキャリパを、上記外輪側支持フランジ６の外側面である外輪側取付面１５に接触させた状態で取り付ける。そして、上記ディスク９と上記キャリパとを組み合わせる事により、上記ディスクブレーキを構成する。制動時には、上記ディスク９を挟んで設けた、上記サポート又は上記キャリパに組み付けた１対のパッドを、このディスク９の両側面に押し付ける。尚、図示の車輪支持用転がり軸受ユニットは従動輪（ＦＦ車の後輪、ＦＲ車の前輪）用であるが、駆動輪（ＦＦ車の前輪、ＦＲ車の後輪、４ＷＤ車の全車輪）用の車輪支持用転がり軸受ユニットの場合には、前記ハブ２の中心部にスプライン孔を設ける。そして、自動車への組み付け時に、このスプライン孔に等速ジョイントのスプライン軸（駆動軸）をスプライン係合させる。   When the rolling bearing unit for supporting a wheel configured as described above is assembled to an automobile, the coupling flange 5 is coupled and fixed to the knuckle while the inner surface of the coupling flange 5 is in contact with the outer surface of the knuckle. To do. Further, the disk 9 and the wheel are attached to the rotating side support flange 10 in a state in which a portion closer to the inner diameter of one side surface of the disk 9 is brought into contact with the rotating side mounting surface 14 which is the outer side surface of the rotating side support flange 10. The plurality of studs 13 and nuts (not shown) are supported and fixed. Further, when the disc brake is a floating caliper type, a support for supporting the caliper is provided. When the disc brake is an opposed piston type, the caliper is provided on the outer ring side which is the outer surface of the outer ring side support flange 6. It attaches in the state contacted to the attachment surface 15. The disk brake is configured by combining the disk 9 and the caliper. At the time of braking, a pair of pads mounted on the support or the caliper provided across the disk 9 are pressed against both side surfaces of the disk 9. Although the illustrated wheel support rolling bearing unit is for a driven wheel (rear wheel of FF vehicle, front wheel of FR vehicle), driving wheel (front wheel of FF vehicle, rear wheel of FR vehicle, all wheels of 4WD vehicle) In the case of a rolling bearing unit for supporting a wheel, a spline hole is provided at the center of the hub 2. Then, the spline shaft (drive shaft) of the constant velocity joint is spline-engaged with the spline hole when assembled to the automobile.

ところで、上述した様な外輪側支持フランジ６を有し、上記ディスク９と組み合わされた状態で使用される車輪支持用転がり軸受ユニットを製造する場合に従来は、上記外輪側取付面１５の仕上加工と上記回転側取付面１４の仕上加工とを、それぞれ別個独立に（直接的な関連性を持たせる事なく）行なっていた。上記外輪側取付面１５の仕上加工と、上記ディスク９の径方向外半部の両側面であって互いに平行な１対の制動用摩擦面１６、１６との仕上加工に就いても同様である。ところが、この様に外輪側取付面１５の仕上加工と、上記回転側取付面１４或いは上記両制動用摩擦面１６、１６の仕上加工とをそれぞれ別個独立に行なうと、これら各面１４、１５、１６の面精度（例えば、平面度や中心軸に対する直角度）を十分に確保できても、完成後にこれら各面１４、１５、１６同士の相対精度（例えば平行度）を十分に確保できなくなる可能性がある。   By the way, when manufacturing a wheel bearing rolling bearing unit that has the outer ring side support flange 6 as described above and is used in combination with the disk 9, conventionally, the outer ring side mounting surface 15 is finished. And the finishing of the rotating side mounting surface 14 are performed separately and independently (without direct relation). The same applies to the finishing of the outer ring side mounting surface 15 and the finishing of the pair of braking friction surfaces 16, 16 parallel to each other on both sides of the radially outer half of the disk 9. . However, when the finishing process of the outer ring side mounting surface 15 and the finishing process of the rotating side mounting surface 14 or the braking friction surfaces 16 and 16 are performed separately and independently, the respective surfaces 14, 15, Even if the surface accuracy of 16 (for example, flatness and perpendicularity with respect to the central axis) can be sufficiently ensured, the relative accuracy (for example, parallelism) between these surfaces 14, 15, 16 may not be sufficiently ensured after completion. There is sex.

例えば、上記回転側取付面１４と外輪側取付面１５との平行度、或いは、この外輪側取付面１５と上記両制動用摩擦面１６、１６との平行度が十分に確保されていない場合には、これら両制動用摩擦面１６、１６と、上記外輪側取付面１５に取り付けたサポート又はキャリパとの、互いの位置関係を良好に（所望通りに）できなくなる。この結果、上記両制動用摩擦面１６、１６と前記１対のパッドとの接触状態が不均一になる。そして、この不均一の度合いが大きくなると、制動時に、ジャダーと呼ばれる、異音を伴った振動が発生し易くなる。そこで、この様なジャダーの発生を抑えられる様にすべく、上記回転側取付面１４と外輪側取付面１５との平行度、延いては、この外輪側取付面１５と上記両制動用摩擦面１６、１６との平行度を十分に確保する為の製造方法が、特願２００６―２２９９９２に開示されている。この先発明に係る製造方法を実施する場合には、上記外輪側取付面１５を備えた前記外輪１に対し、上記回転側取付面１４を備えた前記ハブ２を回転させる。そして、上記外輪側取付面１５を基準面として、この回転側取付面１４、或いはこの回転側取付面１４に結合固定したディスクの両制動用摩擦面１６、１６に、旋削等の仕上加工を施す事により、上記ジャダーの発生に繋がる様な、外輪側取付面１５に対する、回転側取付面１４或は両制動用摩擦面１６、１６の振れを抑える。尚、上記製造方法は本発明の要旨と直接の関係は無い為（本発明の要旨は車輪支持用転がり軸受ユニットの構造である為）、上記製造方法に関する図示等の詳しい説明は省略する。   For example, when the parallelism between the rotation side mounting surface 14 and the outer ring side mounting surface 15 or the parallelism between the outer ring side mounting surface 15 and the braking friction surfaces 16 and 16 is not sufficiently secured. Therefore, the positional relationship between the braking friction surfaces 16 and 16 and the support or caliper attached to the outer ring side attachment surface 15 cannot be improved (as desired). As a result, the contact state between the braking friction surfaces 16 and 16 and the pair of pads becomes uneven. If the degree of non-uniformity increases, vibration with abnormal noise, called judder, is likely to occur during braking. Therefore, in order to suppress the occurrence of such judder, the parallelism between the rotating side mounting surface 14 and the outer ring side mounting surface 15, that is, the outer ring side mounting surface 15 and the both braking friction surfaces. Japanese Patent Application No. 2006-229992 discloses a manufacturing method for sufficiently ensuring the parallelism with 16, 16. When the manufacturing method according to the present invention is carried out, the hub 2 provided with the rotating side mounting surface 14 is rotated with respect to the outer ring 1 provided with the outer ring side mounting surface 15. Then, with the outer ring side mounting surface 15 as a reference surface, the rotating side mounting surface 14 or both braking friction surfaces 16 and 16 of the disk coupled and fixed to the rotating side mounting surface 14 are subjected to finishing processing such as turning. As a result, the swinging of the rotating side mounting surface 14 or both braking friction surfaces 16 and 16 with respect to the outer ring side mounting surface 15 that leads to the occurrence of judder is suppressed. In addition, since the said manufacturing method does not have a direct relationship with the summary of this invention (because the summary of this invention is the structure of the rolling bearing unit for wheel support), detailed description, such as illustration regarding the said manufacturing method, is abbreviate | omitted.

上記の様な製造方法で製造された車輪支持用転がり軸受ユニットは、上記外輪側取付面１５と上記両制動用摩擦面１６、１６との平行度を十分に確保でき、これら両制動用摩擦面１６、１６と、上記外輪側取付面１５に取り付けたサポート又はキャリパとの、互いの位置関係を良好にできる為、ブレーキジャダーの発生防止に対して有利である。但し、上述の様な先発明の製造方法を実施したとしても、ブレーキジャダーの発生をより効果的に防止する為には、キャリパ又はサポートの支持剛性を高め、走行時の振動に拘らず、前記回転側支持フランジ１０に対する、前記外輪側支持フランジ６の振れを抑える必要がある。この様な目的で上記支持剛性を高める為に、単に前記外輪１（外輪側支持フランジ６）の肉厚を大きくすると、この外輪１を含む車輪支持用転がり軸受ユニットの重量が徒に嵩んでしまう。上記外輪１の肉厚の増大は、上記先発明を実施する場合に、上記外輪側取付面１５に関する支持剛性を確保する面からも生じる。何れにしても、上記車輪支持用転がり軸受ユニットは、懸架装置を構成するばねよりも路面側に設けられる、所謂ばね下荷重である為、乗り心地や走行安定性を中心とする走行性能を向上させる為には、少しでも軽量化する事が望まれる部品である。これらの事を考慮すると、上記構造の車輪支持用転がり軸受ユニットには、改良の余地がある。   The wheel-supporting rolling bearing unit manufactured by the manufacturing method as described above can sufficiently ensure the parallelism between the outer ring side mounting surface 15 and the braking friction surfaces 16, 16, and these braking friction surfaces. 16 and 16 and the support or caliper attached to the outer ring side attachment surface 15 can be made to have a good mutual positional relationship, which is advantageous in preventing the occurrence of brake judder. However, even if the manufacturing method of the prior invention as described above is carried out, in order to more effectively prevent the occurrence of brake judder, the support rigidity of the caliper or the support is increased, regardless of the vibration during traveling, It is necessary to suppress the deflection of the outer ring side support flange 6 with respect to the rotation side support flange 10. If the thickness of the outer ring 1 (outer ring side support flange 6) is simply increased in order to increase the support rigidity for such a purpose, the weight of the wheel support rolling bearing unit including the outer ring 1 is increased. . The increase in the thickness of the outer ring 1 also occurs from the surface that secures the support rigidity related to the outer ring side mounting surface 15 when the above-described invention is carried out. In any case, the rolling bearing unit for supporting the wheel is a so-called unsprung load provided on the road surface side of the spring constituting the suspension device, so that the running performance centering on the ride comfort and running stability is improved. In order to achieve this, it is a part that is desired to be lighter. Considering these things, there is room for improvement in the wheel bearing rolling bearing unit having the above structure.

米国特許出願公開第２００３／０１６５２８０号明細書US Patent Application Publication No. 2003/0165280

本発明は、上述の様な事情に鑑み、制動時のジャダーの発生をより効果的に抑えられる様にすべく、ディスクを取り付ける回転側支持フランジの回転側取付面と、キャリパ又はサポートを支持固定する支持面である外輪側取付面とを備えた車輪支持用転がり軸受ユニットに関して、外輪側支持フランジを含む外輪の肉厚を増す事なく、上記キャリパ又はサポートの支持剛性を高め、上記回転側支持フランジと上記外輪側支持フランジとの相対的振れを低減できる構造を実現すべく発明したものである。
又、本発明は、前述した先発明に係る製造方法を実施する際の、機械加工力に対しての剛性を高くできる構造を実現すべく発明したものである。 In view of the circumstances as described above, the present invention supports and fixes a rotation side mounting surface of a rotation side support flange to which a disk is mounted and a caliper or a support so as to more effectively suppress the occurrence of judder during braking. With respect to a rolling bearing unit for supporting a wheel provided with an outer ring side mounting surface that is a supporting surface, the rigidity of the caliper or support is increased without increasing the thickness of the outer ring including the outer ring side support flange, and the rotation side support is increased. The present invention was invented to realize a structure capable of reducing the relative vibration between the flange and the outer ring side support flange.
Further, the present invention was invented to realize a structure capable of increasing the rigidity against the machining force when the manufacturing method according to the above-described invention is performed.

本発明の対象となる車輪支持用転がり軸受ユニットは、外輪と、ハブと、複数個の転動体とを備える。このうちの外輪は、内周面に複列の外輪軌道を、外周面にディスクブレーキを構成するキャリパ又はサポートを支持固定する為の外輪側支持フランジを、それぞれ有し、使用時に懸架装置に結合固定された状態で回転しない。又、上記ハブは、外周面の軸方向外端部に車輪及びディスクを支持固定する為の回転側支持フランジを、同じく軸方向に関する中間部及び内端部に複列の内輪軌道を、それぞれ有し、使用時に上記車輪及びディスクと共に回転する。更に、上記各転動体は、上記両内輪軌道と上記両外輪軌道との間に各列毎に複数個ずつ、背面組み合わせ型の接触角を付与された状態で設けられている。   A wheel bearing rolling bearing unit that is an object of the present invention includes an outer ring, a hub, and a plurality of rolling elements. Of these, the outer ring has a double-row outer ring raceway on the inner peripheral surface, and an outer ring side support flange on the outer peripheral surface for supporting and fixing the caliper or support that constitutes the disc brake. Do not rotate in a fixed state. In addition, the hub has a rotation-side support flange for supporting and fixing the wheel and the disk at the outer end in the axial direction of the outer peripheral surface, and a double-row inner ring raceway at the intermediate and inner ends in the axial direction. And rotates with the wheel and disk in use. Further, each of the rolling elements is provided in a state where a contact angle of a rear combination type is provided between each of the inner ring raceways and the both outer ring raceways for each row.

特に、本発明の車輪支持用転がり軸受ユニットに於いては、上記外輪側支持フランジの軸方向両側面のうち、キャリパ又はサポートを支持固定する支持面を平坦としている。又、この支持面と反対側の面の円周方向両端部に、径方向内側に向かう程この反対側の面から軸方向に大きく突出する状態で１対のリブを設けている。そして、これら両リブを設けた部分で、上記外輪側支持フランジの軸方向に関する厚さ寸法を、径方向内側に向かうほど大きくしている。
又、上述の様な本発明の車輪支持用転がり軸受ユニットを実施する場合に具体的に、請求項２に記載した発明の様に、上記外輪側支持フランジが、上記結合フランジの外径側端部から更に径方向外側に延びた状態で設けられている構造とする。 In particular, in the rolling bearing unit for supporting a wheel according to the present invention, the support surface for supporting and fixing the caliper or the support is flat among the axially opposite side surfaces of the outer ring side support flange. Further, a pair of ribs is provided at both ends in the circumferential direction of the surface opposite to the support surface in a state of projecting greatly in the axial direction from the opposite surface toward the inner side in the radial direction. And in the part which provided both these ribs, the thickness dimension regarding the axial direction of the said outer ring | wheel side support flange is enlarged so that it goes to radial direction inner side.
Further, when the rolling bearing unit for supporting a wheel of the present invention as described above is implemented, the outer ring side support flange is, as in the invention described in claim 2 , the outer diameter side end of the coupling flange. It shall be the structure provided with further state that extends radially outward from the part.

上述の様に構成する本発明の車輪支持用転がり軸受ユニットによれば、外輪側支持フランジの軸方向に関する厚さ寸法を、径方向内側に向かうほど大きくする事で、外輪側支持フランジ全体の軸方向に関する厚さ寸法を均一に大きくする場合に比べて、同じ剛性を得るにしても、軽量な構造で剛性を高める事ができる。つまり、外輪（外輪側支持フランジ）の肉厚を増す事なく、制動時にキャリパ又はサポートから上記外輪側支持フランジに加わる入力に対する支持剛性を高める事ができる。これらにより、軽量化と高剛性化との両立を図れる。そして、上記外輪の軽量化は車輪支持用転がり軸受ユニットの軽量化に繋がる為、懸架装置を構成するばねよりも路面側に存在する、所謂ばね下荷重の増加を抑え、乗り心地や走行安定性の向上を図れる。
更に、車輪及びディスクを支持固定する為の回転側支持フランジの回転側取付面或いはこのディスクに設けた１対の制動用摩擦面と、上記外輪側取付面との平行度を十分に確保する為の仕上加工を施す際に、この外輪側取付面の剛性及び加工の安定性を確保できる。この為、前述した先発明の製造方法を実施する事により、上記回転側支持フランジに対する上記外輪側支持フランジの振れを十分に低減できて、制動時にジャダーの発生を抑えられる。
又、本発明は、上記外輪側支持フランジの軸方向両側面のうちで、キャリパ又はサポートを支持固定する支持面と反対側の面の円周方向両端部に、この反対側の面から軸方向に突出する１対のリブを設けた構造としているので、軽量化及び材料節約による生産性の向上を、より一層図る事ができる。
又、本発明の構造は、製造・加工の際に次の様な利点もある。即ち、本発明の構造の車輪支持用転がり軸受ユニットを製造する際に、上記外輪は熱間鍛造によって、円柱状、又は円筒状のビレットから成形される為、上記外輪側支持フランジ部分はビレットから大きく張り出して成形される。その際に、上記外輪側支持フランジの径方向内側が厚く、径方向外側が薄くなる本発明の形状は成形し易い。この為、製造能率向上や、不良品の発生を抑えて歩留りを向上させる事による低コスト化を図れる。 According to the wheel support rolling bearing unit of the present invention configured as described above, the axial dimension of the outer ring side support flange as a whole is increased by increasing the thickness dimension in the axial direction of the outer ring side support flange toward the radially inner side. Even if the same rigidity is obtained as compared with the case where the thickness dimension with respect to the direction is increased uniformly, the rigidity can be increased with a lightweight structure. That is, without increasing the thickness of the outer ring (outer ring side support flange), it is possible to increase the support rigidity for the input applied to the outer ring side support flange from the caliper or the support during braking. As a result, both weight reduction and high rigidity can be achieved. Since the weight reduction of the outer ring leads to the weight reduction of the rolling bearing unit for supporting the wheel, an increase in the so-called unsprung load existing on the road surface side than the spring constituting the suspension device is suppressed, and the ride comfort and running stability are reduced. Can be improved.
Further, in order to ensure sufficient parallelism between the rotation side mounting surface of the rotation side support flange for supporting and fixing the wheel and the disk or the pair of braking friction surfaces provided on the disk and the outer ring side mounting surface. When the finishing process is performed, the rigidity of the outer ring side mounting surface and the stability of the process can be ensured. For this reason, by implementing the manufacturing method of the above-mentioned prior invention, the deflection of the outer ring side support flange with respect to the rotation side support flange can be sufficiently reduced, and the occurrence of judder can be suppressed during braking.
Further, the present invention provides an axial direction from the opposite surface to both ends in the circumferential direction of the surface opposite to the support surface for supporting and fixing the caliper or the support among both axial surfaces of the outer ring side support flange. since a structure in which a pair ribs protruding to the improvement of productivity due to weight reduction and material savings, it is even more reduced it.
The structure of the present invention also has the following advantages during manufacturing and processing. That is, when manufacturing the rolling bearing unit for supporting a wheel having the structure of the present invention, the outer ring is formed from a columnar or cylindrical billet by hot forging. Formed by overhanging. At that time, the shape of the present invention in which the radially inner side of the outer ring side support flange is thick and the radially outer side is thin is easy to mold. For this reason, it is possible to reduce the cost by improving the production efficiency and improving the yield by suppressing the occurrence of defective products.

［本発明に関する参考例の１例］
図１〜２は、本発明に関する参考例の１例を示している。尚、本参考例の特徴は、外輪側支持フランジ６が、結合フランジ５の外径側端部から更に径方向外側に延びた状態で設けられており、上記外輪側支持フランジ６の軸方向両側面のうち、キャリパ又はサポートを支持固定する支持面である、外輪側取付面１５は平坦であり、この外輪側取付面１５と反対側の面１８との距離を、径方向内側に向かうほど大きくする点にある。対象となる車輪支持用転がり軸受ユニットの基本構造等、その他の部分の構造及び作用は、前述の図９〜１０に示した車輪支持用転がり軸受ユニットの場合と同様である。この為、同等部分には同一符号を付して、重複する説明を省略若しくは簡略にし、以下、本参考例の特徴部分を中心に説明する。 [ Example of Reference Example of the Present Invention ]
1 and 2 show an example of a reference example related to the present invention . It should be noted that the feature of this reference example is that the outer ring side support flange 6 is provided in a state of extending further radially outward from the outer diameter side end portion of the coupling flange 5, and both sides of the outer ring side support flange 6 in the axial direction are provided. Of the surfaces, the outer ring side mounting surface 15 which is a support surface for supporting and fixing the caliper or the support is flat, and the distance between the outer ring side mounting surface 15 and the surface 18 on the opposite side increases toward the inner side in the radial direction. There is in point to do. The structure and operation of other parts such as the basic structure of the subject wheel support rolling bearing unit are the same as those of the wheel support rolling bearing unit shown in FIGS. For this reason, the same reference numerals are given to the equivalent parts, and overlapping explanations are omitted or simplified, and the following description will focus on the characteristic parts of this reference example .

本参考例の場合には、上記外輪側支持フランジ６の軸方向両側面のうちで、上記外輪側取付面１５は平坦であり、この外輪側取付面１５と反対側の面１８に傾斜面１９を設ける事により、この外輪側取付面１５と反対側の面１８との距離を、径方向内側に向かうほど大きくしている。
尚、傾斜面１９は、本参考例の様に一様なテーパ状である必要はなく、傾斜面１９にボルトやナットの座面がある場合には、その部分は、機械加工を施して、平坦な面としても良い。又、図２に鎖線で示す様に、上記外輪側支持フランジ６の基部に、軽量化の為の除肉部２３を形成する事もできる。 In the case of the present reference example, the outer ring side mounting surface 15 is flat among the axially opposite side surfaces of the outer ring side support flange 6, and the inclined surface 19 is formed on the surface 18 opposite to the outer ring side mounting surface 15. By providing this, the distance between the outer ring side mounting surface 15 and the opposite surface 18 is increased toward the inner side in the radial direction.
In addition, the inclined surface 19 does not need to have a uniform taper shape as in this reference example , and when the inclined surface 19 has a seat surface of a bolt or a nut, the portion is machined, It may be a flat surface. Further, as shown by a chain line in FIG. 2, a thinned portion 23 for weight reduction can be formed at the base portion of the outer ring side support flange 6.

上記外輪側支持フランジ６の形状を上記の様にする事で、この外輪側支持フランジ６全体の軸方向に関する厚さ寸法を均一に大きくする場合に比べて、同じ剛性を得るにしても、軽量な構造で剛性を高める事ができる。つまり、外輪１の肉厚を増す事なく、制動時にキャリパ又はサポートから上記外輪側支持フランジ６に加わる入力に対する支持剛性を高める事ができる。
更に、車輪及びディスク９（図９参照）を支持固定する為の回転側支持フランジ１０の回転側取付面１４或いはこのディスク９に設けた１対の制動用摩擦面１６、１６（図９参照）と、上記外輪側取付面１５との平行度を十分に確保する為の仕上加工を施す際に、この外輪側取付面１５の剛性及び加工の安定性を確保できる。この為、前述した先発明の製造方法を実施する事で、上記回転側支持フランジ１０に対する、上記外輪側支持フランジ６の振れを十分に低減できる。これらにより、軽量化と高剛性化との両立を図れる。そして、上記外輪１の軽量化は車輪支持用転がり軸受ユニットの軽量化に繋がる為、懸架装置を構成するばねよりも路面側に存在する、所謂ばね下荷重の増加を抑え、乗り心地や走行安定性の向上を図れる。 By making the shape of the outer ring side support flange 6 as described above, even if the same rigidity is obtained as compared with the case where the thickness dimension in the axial direction of the entire outer ring side support flange 6 is uniformly increased, the weight is reduced. The rigidity can be increased with a simple structure. That is, without increasing the thickness of the outer ring 1, it is possible to increase the support rigidity for the input applied to the outer ring side support flange 6 from the caliper or the support during braking.
Further, the rotation side mounting surface 14 of the rotation side support flange 10 for supporting and fixing the wheel and the disk 9 (see FIG. 9) or a pair of braking friction surfaces 16 and 16 provided on the disk 9 (see FIG. 9). When the finishing process is performed to ensure sufficient parallelism with the outer ring side mounting surface 15, the rigidity and processing stability of the outer ring side mounting surface 15 can be ensured. For this reason, by implementing the manufacturing method of the above-mentioned prior invention, the runout of the outer ring side support flange 6 with respect to the rotation side support flange 10 can be sufficiently reduced. As a result, both weight reduction and high rigidity can be achieved. Since the weight reduction of the outer ring 1 leads to the weight reduction of the rolling bearing unit for supporting the wheel, an increase in the so-called unsprung load existing on the road surface side with respect to the spring constituting the suspension device is suppressed, and the ride comfort and running stability are suppressed. Can improve the performance.

本参考例の場合、上記キャリパ又はサポートを支持固定する支持面である、外輪側取付面１５を、上記外輪側支持フランジ６の軸方向外側面としているが、この外輪側取付面１５の位置は、車輪支持用転がり軸受ユニットの大きさ、上記キャリパ又はサポートの大きさ、上記ディスク９の大きさ等に応じて設計的に定めるものである。そして、上記外輪側支持フランジ６の軸方向内側面を外輪側取付面とする場合にも、本参考例の構造とする事で同様の効果を得る事ができる。 In the case of this reference example , the outer ring side mounting surface 15 which is a support surface for supporting and fixing the caliper or the support is used as the axially outer side surface of the outer ring side support flange 6. The position of the outer ring side mounting surface 15 is The design is determined according to the size of the wheel bearing rolling bearing unit, the size of the caliper or support, the size of the disk 9, and the like. Even when the axially inner side surface of the outer ring side support flange 6 is an outer ring side mounting surface, the same effect can be obtained by adopting the structure of this reference example .

［実施の形態の１例］
図３〜４は、請求項１〜２に対応する、本発明の実施の形態の１例を示している。本例の場合には、外輪側支持フランジ６の軸方向両側面のうちで、外輪側取付面１５は平坦であり、この外輪側取付面１５と反対側の面１８の両脇に、径方向内側に向かうほど軸方向内側に大きく突出する１対のリブ１７、１７を設け、これら両リブ１７、１７を設けた部分で、上記外輪側支持フランジ６の軸方向厚さを、径方向内側程大きくしている。この為、軽量化と剛性確保との両立を、より高次元で図れる。
その他の部分の構成及び作用に就いては、上述した参考例の１例と同様であるから、重複する説明は省略する。 [ Example of Embodiment ]
3 to 4 show an example of an embodiment of the present invention corresponding to claims 1 and 2 . In the case of this example, the outer ring side mounting surface 15 is flat among the both axial side surfaces of the outer ring side support flange 6, and the both sides of the surface 18 on the opposite side of the outer ring side mounting surface 15 are radially arranged. A pair of ribs 17 and 17 projecting inward in the axial direction as they go inward are provided , and the thickness of the outer ring side support flange 6 in the radial direction is increased in the portion where both ribs 17 and 17 are provided. It is getting bigger . For this reason, it is possible to achieve both a reduction in weight and securing rigidity at a higher level.
Since the configuration and operation of the other parts are the same as those of the above-described reference example , the overlapping description is omitted.

本発明に関する参考例の１例を示す断面図。Sectional drawing which shows one example of the reference example regarding this invention . この参考例の１例の要部を示す図１のＡ部の拡大斜視図。 The expanded perspective view of the A section of FIG. 1 which shows the principal part of one example of this reference example . 本発明の実施の形態の１例を示す断面図。Sectional drawing which shows one example of embodiment of this invention. 本発明の実施の形態の１例の要部を示す図３のＢ部の拡大斜視図。The expansion perspective view of the B section of Drawing 3 showing the important section of one example of an embodiment of the invention. 本発明の対象となる車輪支持用転がり軸受ユニットを示す断面図。Sectional drawing which shows the rolling bearing unit for wheel support used as the object of this invention. 同じく、一部を省略して示す斜視図。Similarly, the perspective view which abbreviate | omits and shows a part.

１ 外輪
２ ハブ
３ 玉
４ａ、４ｂ 外輪軌道
５ 結合フランジ
６ 外輪側支持フランジ
７ ハブ本体
８ 内輪
９ ディスク
１０ 回転側支持フランジ
１１ａ、１１ｂ 内輪軌道
１２ 圧入孔
１３ スタッド
１４ 回転側取付面
１５ 外輪側取付面
１６ 制動用摩擦面
１７ リブ
１８ 反対側の面
１９ 傾斜面
２０ 段部
２１ 取付孔
２２ 取付孔
２３ 除肉部 DESCRIPTION OF SYMBOLS 1 Outer ring 2 Hub 3 Ball 4a, 4b Outer ring raceway 5 Coupling flange 6 Outer ring side support flange 7 Hub body 8 Inner ring 9 Disc 10 Rotation side support flange 11a, 11b Inner ring raceway 12 Press-fitting hole 13 Stud 14 Rotation side mounting surface 15 Outer ring side installation Surface 16 Friction surface for braking
17 Rib 18 Opposite surface 19 Inclined surface 20 Stepped portion 21 Mounting hole 22 Mounting hole 23 Wall removal portion

Claims (2)

内周面に複列の外輪軌道を、外周面に懸架装置に結合固定する為の結合フランジ及びディスクブレーキを構成するキャリパ又はサポートを支持固定する為の外輪側支持フランジを、それぞれ有し、使用時に懸架装置に結合固定された状態で回転しない外輪と、外周面の軸方向外端部に車輪及びディスクを支持固定する為の回転側支持フランジを、同じく軸方向に関する中間部及び内端部に複列の内輪軌道を、それぞれ有し、使用時に上記車輪及びディスクと共に回転するハブと、これら両内輪軌道と上記両外輪軌道との間に各列毎に複数個ずつ、背面組み合わせ型の接触角を付与された状態で設けられた転動体とを備えた車輪支持用転がり軸受ユニットであって、外輪側支持フランジの軸方向両側面のうち、キャリパ又はサポートを支持固定する支持面は平坦であり、この支持面と反対側の面の円周方向両端部に、径方向内側に向かう程この反対側の面から軸方向に大きく突出する状態で１対のリブを設けており、これら両リブを設けた部分で上記外輪側支持フランジの軸方向に関する厚さ寸法が、径方向内側に向かうほど大きくなっている事を特徴とする車輪支持用転がり軸受ユニット。 It has a double row outer ring raceway on the inner circumferential surface, a coupling flange for coupling and fixing to the suspension system on the outer circumferential surface, and an outer ring side support flange for supporting and fixing the caliper or support constituting the disc brake. Sometimes an outer ring that does not rotate in a state of being coupled and fixed to a suspension device, and a rotation side support flange for supporting and fixing a wheel and a disk at the outer end in the axial direction of the outer peripheral surface are also provided at the intermediate and inner ends in the same axial direction. A contact angle of a rear combination type having a plurality of inner ring raceways each having a plurality of inner ring raceways and rotating together with the wheel and the disk in use, and a plurality of each inner row raceway and both outer ring raceways in each row. a wheel supporting rolling bearing unit comprising a rolling element disposed in a state of being granted, among both axial side surfaces of the outer ring supporting flange, supporting and fixing the caliper or support The supporting surface is flat, and a pair of ribs is provided at both ends in the circumferential direction of the surface opposite to the supporting surface so as to protrude in the axial direction from the opposite surface toward the radially inner side. The wheel bearing rolling bearing unit is characterized in that the thickness dimension in the axial direction of the outer ring side support flange increases toward the inner side in the radial direction at the portion where both the ribs are provided . 外輪側支持フランジが、結合フランジの外径側端部から更に径方向外側に延びた状態で設けられている、請求項１に記載した車輪支持用転がり軸受ユニット。 The wheel bearing rolling bearing unit according to claim 1, wherein the outer ring side support flange is provided in a state of extending further radially outward from an outer diameter side end of the coupling flange.
JP2007179334A 2007-07-09 2007-07-09 Rolling bearing unit for wheel support Expired - Fee Related JP5141114B2 (en)

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SE8904082D0 (en) * 1989-12-04 1989-12-04 Skf Nova Ab hub unit
JP2005069300A (en) * 2003-08-21 2005-03-17 Koyo Seiko Co Ltd Wheel supporting structure
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