JP2006083922A - Bearing device for supporting wheel - Google Patents

Bearing device for supporting wheel Download PDF

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JP2006083922A
JP2006083922A JP2004268395A JP2004268395A JP2006083922A JP 2006083922 A JP2006083922 A JP 2006083922A JP 2004268395 A JP2004268395 A JP 2004268395A JP 2004268395 A JP2004268395 A JP 2004268395A JP 2006083922 A JP2006083922 A JP 2006083922A
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wheel
bearing
hub
bearing device
wheel support
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Akira Takahashi
明 高橋
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NSK Ltd
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NSK Ltd
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    • 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 

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  • Mounting Of Bearings Or Others (AREA)
  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for supporting a wheel achieving further weight reduction. <P>SOLUTION: This bearing device 50 for supporting the wheel has two rows of single row angular ball bearings 23 provided separately in an axial direction between a hub 22 as an inner member and a knuckle 21 as an outer member. A plurality of through holes 51 are provided on a wall part positioned between two rows of the single row angular ball bearings 23 of the knuckle 21 with a predetermined interval in a circumference direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、例えば自動車等の車輪を懸架装置に対して回転自在に支持するための車輸支持用軸受装置に関する。   The present invention relates to a vehicle transport support bearing device for rotatably supporting a wheel of, for example, an automobile with respect to a suspension device.

従来のこの種の車輪支持用軸受装置としては、例えば、特許文献１に記載されたものがある。図９に示した車輪支持用軸受装置は、外方部材としての外側軌道輪（固定側）１、内方部材としての内側軌道輪（回転側）３及び複数の転動体１０を備えている。内側軌道輪３はハブ輪４を有しており、ハブ輪４の外周面のアウトボード側端部（自動車への組み付け状態で車幅方向外側の端部：図９の左端部）には車輪取付用フランジ７が設けられ、該車輪取付用フランジ７には車輪を取り付けるためのハブボルト７ａが周方向に略等間隔で複数植設されている。ハブ輪４の内周面にはスプライン溝６が形成されており、該スプライン溝６には車両への組み付け時に等速ジョイントを介して回転駆動される駆動軸が挿入される。   As this type of conventional wheel support bearing device, for example, there is one described in Patent Document 1. The wheel support bearing device shown in FIG. 9 includes an outer race (fixed side) 1 as an outer member, an inner race (rotation side) 3 as an inner member, and a plurality of rolling elements 10. The inner race ring 3 has a hub ring 4, and a wheel is provided on the outer side of the outer peripheral surface of the hub ring 4 (the end on the outer side in the vehicle width direction in the assembled state in the automobile: the left end in FIG. 9). A mounting flange 7 is provided, and a plurality of hub bolts 7a for mounting the wheel are implanted in the circumferential direction in the wheel mounting flange 7 at substantially equal intervals. A spline groove 6 is formed on the inner peripheral surface of the hub wheel 4, and a drive shaft that is rotationally driven through a constant velocity joint when inserted into the vehicle is inserted into the spline groove 6.

また、ハブ輪４のインボード側端部（自動車への組み付け状態で車幅方向内側の端部：図９の右端部）の小径段部には内輪５が嵌め込まれており、該内輪５の外周面及びハブ輪４の軸方向の中間部外周面にはそれぞれ内輪軌道面９が形成されて複列の内輪軌道面９，９とされている。   Further, an inner ring 5 is fitted into a small diameter step portion of the inboard side end portion of the hub wheel 4 (the end portion on the inner side in the vehicle width direction in the assembled state in the automobile: the right end portion in FIG. 9). Inner ring raceway surfaces 9 are respectively formed on the outer peripheral surface and the outer peripheral surface of the intermediate portion in the axial direction of the hub wheel 4 to form double-row inner ring raceway surfaces 9 and 9.

外側軌道輪１の内周面にはハブ輪４の内輪軌道面９に対応する外輪軌道面８及び内輪５の内輪軌道面９に対応する外輪軌道面８がそれぞれ形成されて複列の外輪軌道面８，８とされている。また、外側軌道輪１の軸方向の中間部外周面には懸架装置取付用フランジ２が設けられている。そして、複列の内輪軌道面９，９と複列の外輪軌道面８，８との間にそれぞれ複数の転動体１０が保持器１１を介して周方向に転動可能に配設されている。
尚、図示の例では、転動体１０として玉を使用しているが、車重の大きな車、或いは高旋回荷重の入る車（スポーツカー、競技用車両等）に使用されるハブユニット軸受の場合には、転動体１０としてテーパころを使用する場合もある。 An outer ring raceway surface 8 corresponding to the inner ring raceway surface 9 of the hub ring 4 and an outer ring raceway surface 8 corresponding to the inner ring raceway surface 9 of the inner ring 5 are formed on the inner peripheral surface of the outer raceway ring 1, respectively. Surfaces 8 and 8 are used. A suspension device mounting flange 2 is provided on the outer peripheral surface of the intermediate portion in the axial direction of the outer race 1. A plurality of rolling elements 10 are disposed between the double-row inner ring raceway surfaces 9 and 9 and the double-row outer ring raceway surfaces 8 and 8 so as to roll in the circumferential direction via the cage 11. .
In the illustrated example, a ball is used as the rolling element 10, but in the case of a hub unit bearing used in a vehicle having a large vehicle weight or a vehicle (sports car, competition vehicle, etc.) with a high turning load. In some cases, a tapered roller may be used as the rolling element 10.

また、外側軌道輪１のインボード側端部と内側軌道輪３の内輪５との間にシール部材（シール手段）１２ａが設けられていると共に、外側軌道輪１のアウトボード側端部と内側軌道輪３のハブ輪４との間にシール部材（シール手段）１２ｂが設けられている。これにより、車輪支持用軸受装置Ｏの軸受空間１３の軸方向の両端部開口をシールして、封入グリースの漏洩を防止するとともに、外部からの塵埃、水、泥水等の軸受空間１３への侵入を防止している。   Further, a seal member (seal means) 12a is provided between the inboard side end of the outer race 1 and the inner ring 5 of the inner race 3, and the outboard side end of the outer race 1 and the inner side. A seal member (seal means) 12 b is provided between the bearing ring 3 and the hub ring 4. This seals both axial openings of the bearing space 13 in the bearing space 13 of the wheel support bearing device O to prevent leakage of the encapsulated grease, and intrusion of dust, water, muddy water, etc. into the bearing space 13 from the outside. Is preventing.

そして、この車輪支持用軸受装置Ｏを自動車等に組み付けるには、固定輪側である外側軌道輪１に設けられた懸架装置取付用フランジ２を懸架装置に固定すると共に、回転輪側である内側軌道輪３のハブ輪４に設けられた車輪取付用フランジ７にハブボルト７ａ及びナット（図示せず）を介して車輪を固定し、車輪を懸架装置に対して回転自在に支持することができる。   In order to assemble the wheel support bearing device O to an automobile or the like, the suspension device mounting flange 2 provided on the outer raceway 1 on the fixed wheel side is fixed to the suspension device and the inner side on the rotating wheel side. A wheel can be fixed to a wheel mounting flange 7 provided on the hub wheel 4 of the raceway ring 3 via a hub bolt 7a and a nut (not shown), and the wheel can be rotatably supported with respect to the suspension device.

ところで、上述したような車輪支持用軸受装置は、乗用車において主流になりつつあるタイプであるが、競技用車両やトラック等のように特殊な用途に使用される車両については、それぞれ理由は異なるものの（例えば競技用であれば、軽量化のため、重い鋼の軸受部分はなるべく少なくして、その他のナックル、ハブ部分をチタン・複合材料等の軽量な材料を使用している。また、トラック用であれば、主にコスト及びメンテナンスの容易さの為等）、車輪支持用軸受装置の軸受部として単列円錐ころ軸受の２列配置或いは単列アンギュラ玉軸受の２列配置が主流となっている。   By the way, the wheel support bearing device as described above is a type that is becoming mainstream in passenger cars, but for vehicles that are used for special purposes, such as competition vehicles and trucks, the reasons are different. (For competition, for example, to reduce weight, heavy steel bearing parts are reduced as much as possible, and other knuckles and hub parts are made of lightweight materials such as titanium and composite materials. If this is the case, mainly for cost and ease of maintenance, etc., two-row arrangements of single-row tapered roller bearings or two-row arrangements of single-row angular ball bearings have become the mainstream as bearing parts for wheel support bearing devices. Yes.

図１０及び図１１に、軸受部として単列アンギュラ玉軸受を２列配置した車輪支持用軸受装置を示す。
先ず、図１０に示す車輪支持用軸受装置２０は、内輪回転タイプのもので、外方部材としてのナックル（固定側）２１と内方部材としてのハブ（回転側）２２との間に２個の単列アンギュラ玉軸受２３が軸方向に互いに離間して配置されている。 10 and 11 show a wheel support bearing device in which two rows of single-row angular ball bearings are arranged as bearing portions.
First, the wheel support bearing device 20 shown in FIG. 10 is of an inner ring rotating type, and there are two between a knuckle (fixed side) 21 as an outer member and a hub (rotating side) 22 as an inner member. Single-row angular contact ball bearings 23 are spaced apart from each other in the axial direction.

単列アンギュラ玉軸受２３は、ナックル２１の端部内周面に嵌合された外輪２４とハブ２２の端部外周面に嵌合された内輪２５との間に転動体としての複数の玉２６が保持器２７を介して周方向に転動可能に配設されており、ハブ２２のインボード側端部（自動車への組み付け状態で車幅方向内側の端部：図１０の右端部）に螺合されたナット２８によって固定されている。また、外輪２４の軸方向外方の端部内径面にはシール部材（シール手段）２９が装着されており、外部からの塵埃、水、泥水等の軸受空間への侵入を防止している。   The single row angular contact ball bearing 23 has a plurality of balls 26 as rolling elements between an outer ring 24 fitted to the inner peripheral surface of the end of the knuckle 21 and an inner ring 25 fitted to the outer peripheral surface of the end of the hub 22. It is arranged so as to be able to roll in the circumferential direction via the cage 27, and is screwed to the inboard side end of the hub 22 (the inner end in the vehicle width direction in the assembled state in the automobile: the right end in FIG. 10). It is fixed by a combined nut 28. In addition, a seal member (seal means) 29 is attached to the inner diameter surface of the outer ring 24 in the axially outward direction to prevent entry of dust, water, muddy water, and the like from the outside into the bearing space.

また、ハブ２２のアウトボード側端部（自動車への組み付け状態で車幅方向外側の端部：図１０の左端部）には車輪取付用フランジ２２ａが設けられ、該車輪取付用フランジ２２ａには車輪を取り付けるためのハブボルト２８ａが周方向に略等間隔で複数植設されている。   Further, a wheel mounting flange 22a is provided at an end portion on the outboard side of the hub 22 (an end portion on the outer side in the vehicle width direction when assembled to a vehicle: the left end portion in FIG. 10). A plurality of hub bolts 28a for mounting the wheels are planted at substantially equal intervals in the circumferential direction.

そして、この車輪支持用軸受装置２０を自動車等に組み付けるには、固定側であるナックル２１のインボード側の端部を懸架装置に固定すると共に、回転側であるハブ２２に設けられた車輪取付用フランジ２２ａにハブボルト２８ａ及びナット（図示せず）を介して車輪を固定し、車輪を懸架装置に対して回転自在に支持することができる。   In order to assemble the wheel support bearing device 20 to an automobile or the like, the end portion on the inboard side of the knuckle 21 on the fixed side is fixed to the suspension device, and the wheel mounting provided on the hub 22 on the rotation side is mounted. A wheel can be fixed to the flange 22a via a hub bolt 28a and a nut (not shown), and the wheel can be rotatably supported with respect to the suspension device.

一方、図１１に示す車輪支持用軸受装置３０は、外輪回転タイプのもので、外方部材としてのハブ（回転側）３１と内方部材としてのナックル（固定側）３２との間に２個の単列アンギュラ玉軸受３３が軸方向に互いに離間して配置されている。   On the other hand, the wheel support bearing device 30 shown in FIG. 11 is of an outer ring rotating type, and there are two between a hub (rotating side) 31 as an outer member and a knuckle (fixed side) 32 as an inner member. Single-row angular contact ball bearings 33 are spaced apart from each other in the axial direction.

単列アンギュラ玉軸受３３は、ハブ３１の端部内周面に嵌合された外輪３４とナックル３２の端部外周面に嵌合された内輪３５との間に転動体としての複数の玉３６が保持器３７を介して周方向に転動可能に配設されており、ナックル３２のアウトボード側端部（自動車への組み付け状態で車幅方向外側の端部：図１１の左端部）に螺合されたナット３８によって固定されている。また、ハブ３１のアウトボード側の端部開口にはカバー（シール手段）４０が装着されていると共に、インボード側（自動車への組み付け状態で車幅方向内側：図１１の右側）に配置された単列アンギュラ玉軸受３３の外輪３４の軸方向外側（図１１の右側）の端部内径面にはシール部材（シール手段）３９が装着されており、外部からの塵埃、水、泥水等の軸受空間への侵入を防止している。   The single row angular contact ball bearing 33 has a plurality of balls 36 as rolling elements between an outer ring 34 fitted to the inner peripheral surface of the end of the hub 31 and an inner ring 35 fitted to the outer peripheral surface of the end of the knuckle 32. It is arranged so as to be able to roll in the circumferential direction via the cage 37, and is screwed to the end portion on the outboard side of the knuckle 32 (the end portion on the outer side in the vehicle width direction in the assembled state in the automobile: the left end portion in FIG. 11) It is fixed by a combined nut 38. Further, a cover (sealing means) 40 is attached to the end opening of the hub 31 on the outboard side, and is disposed on the inboard side (in the vehicle width direction in the assembled state in the vehicle: right side in FIG. 11). Further, a seal member (seal means) 39 is attached to the inner diameter surface of the outer end 34 of the single-row angular contact ball bearing 33 in the axial direction (right side in FIG. 11). Intrusion into the bearing space is prevented.

更に、ハブ３１のアウトボード側端部には車輪取付用フランジ３１ａが設けられ、該車輪取付用フランジ３１ａには車輪を取り付けるためのハブボルト３８ａが周方向に略等間隔で複数植設されている。   Further, a wheel mounting flange 31a is provided at the end portion on the outboard side of the hub 31, and a plurality of hub bolts 38a for mounting the wheel are implanted at substantially equal intervals in the circumferential direction on the wheel mounting flange 31a. .

そして、この車輪支持用軸受装置３０を自動車等に組み付けるには、固定側であるナックル３２のインボード側の端部を懸架装置に固定すると共に、回転側であるハブ３１に設けられた車輪取付用フランジ３１ａにハブボルト３８ａ及びナット（図示せず）を介して車輪を固定し、これにより、車輪を懸架装置に対して回転自在に支持することができる。
特開２００３−１４８５２６号公報 In order to assemble the wheel support bearing device 30 to an automobile or the like, the end portion on the inboard side of the knuckle 32 on the fixed side is fixed to the suspension device, and the wheel mounting provided on the hub 31 on the rotation side is mounted. The wheel is fixed to the flange 31a via a hub bolt 38a and a nut (not shown), so that the wheel can be rotatably supported with respect to the suspension device.
JP 2003-148526 A

上記従来の車輪支持用軸受装置においては、乗用車、競技用車両、トラック等の各種車両の燃費向上や高速化に寄与するために更なる軽量化が要請されている。   In the conventional wheel support bearing device described above, further weight reduction is required in order to contribute to improvement in fuel consumption and speedup of various vehicles such as passenger cars, competition vehicles, and trucks.

本発明はこのような技術的要請に応えてなされたものであり、更なる軽量化を達成することができる車輪支持用軸受装置を提供することを目的とする。   The present invention has been made in response to such technical demands, and an object of the present invention is to provide a wheel support bearing device that can achieve further weight reduction.

１）本発明に係る車輪支持用軸受装置は、内方部材と外方部材との間に少なくとも転動体を有する複列又は単列２列の軸受部が配設された車輪支持用軸受装置であって、前記外方部材の前記複列の軸受部又は前記単列２列の軸受部の前記各転動体列間に位置する壁部に周方向に所定の間隔で複数の貫通穴又は凹部を設けたことを特徴とする。   1) A wheel support bearing device according to the present invention is a wheel support bearing device in which a double-row or single-row two-row bearing portion having at least rolling elements is disposed between an inner member and an outer member. A plurality of through holes or recesses are provided at predetermined intervals in the circumferential direction on the wall portion located between the rolling element rows of the double row bearing portion of the outer member or the double row bearing portion of the outer member. It is provided.

２）本発明に係る車輪支持用軸受装置は、前記１）における車輪支持用軸受装置であって、前記貫通穴又は前記軸受部の軸方向内方にシール手段を設けたことを特徴とする。   2) The wheel support bearing device according to the present invention is the wheel support bearing device according to 1) above, characterized in that a sealing means is provided inward in the axial direction of the through hole or the bearing portion.

本発明の車輪支持用軸受装置によれば、外方部材の複列の軸受部又は単列２列の軸受部の各転動体列間に位置する壁部に周方向に所定の間隔で複数の貫通穴又は凹部を設けているので、軸受機能に影響を与えることなく、車輪支持用軸受装置の軽量化を図ることができる。   According to the wheel support bearing device of the present invention, a plurality of outer row members or a plurality of single row and two rows of bearing portions of the wall portion located between the rolling element rows at a predetermined interval in the circumferential direction. Since the through hole or the recess is provided, the weight of the wheel supporting bearing device can be reduced without affecting the bearing function.

また、前記貫通穴又は前記軸受部の軸方向内方にシール手段を設けることにより、外部から軸受空間に異物が侵入するのを防止することができる。   Further, by providing a sealing means in the through hole or the axially inner side of the bearing portion, it is possible to prevent foreign matter from entering the bearing space from the outside.

以下、本発明の実施形態を図１〜図８に基づいて詳細に説明する。図１は本発明の第１実施形態である車輪支持用軸受装置を説明するための断面図、図２は貫通穴の一例を説明するための断面図、図３は凹部の一例を説明するための断面図、図４〜図８は本発明の他の実施形態である車輪支持用軸受装置を説明するための断面図である。なお、各実施形態共に、既に図９〜図１１で説明した従来の車輪支持用軸受装置と重複又は相当する部分については各図に同一符号を付してその説明を省略する。   Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 is a cross-sectional view for explaining a wheel support bearing device according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view for explaining an example of a through hole, and FIG. 3 is for explaining an example of a recess. FIGS. 4 to 8 are sectional views for explaining a wheel supporting bearing device according to another embodiment of the present invention. In each of the embodiments, portions that overlap or correspond to the conventional wheel support bearing device already described with reference to FIGS. 9 to 11 are denoted by the same reference numerals and description thereof is omitted.

本発明の第１実施形態である車輪支持用軸受装置５０は、既に図１０で説明した車輪支持用軸受装置２０に本発明を適用したものであり、図１に示すように外方部材としてのナックル（固定側）２１の２列の単列アンギュラ玉軸受２３の各転動体列間の壁部に周方向に略等間隔で複数の貫通穴５１が形成されている。   The wheel support bearing device 50 according to the first embodiment of the present invention is obtained by applying the present invention to the wheel support bearing device 20 already described with reference to FIG. 10. As shown in FIG. A plurality of through holes 51 are formed in the wall portion between the rolling element rows of the two rows of single row angular ball bearings 23 of the knuckle (fixed side) 21 at substantially equal intervals in the circumferential direction.

図２に示すように、貫通穴５１はナックル２１の軸方向に長い長穴状とされており、貫通穴５１のナックル２１の外周側の周方向の縁部Ａとナックル２１の中心Ｏとを結ぶ線Ａ−Ｏに対して貫通穴５１のナックル２１の内周側の周方向の縁部Ｂが周方向内側に位置している。これにより、貫通穴５１からナックル２１内に異物が侵入しにくい構造になっている。また、本実施形態では、単列アンギュラ玉軸受２３の外輪２４の軸方向外側の端部内径面に装着されたシール部材２９に加えて、軸方向内側の端部内径面にもシール部材（シール手段）２９が装着されて、各単列アンギュラ玉軸受２３の軸方向の両端部にそれぞれシール部材２９が設けられている。   As shown in FIG. 2, the through hole 51 is formed in a long hole shape in the axial direction of the knuckle 21, and the circumferential edge A on the outer peripheral side of the knuckle 21 of the through hole 51 and the center O of the knuckle 21 are formed. The circumferential edge B on the inner peripheral side of the knuckle 21 of the through hole 51 is located on the inner side in the circumferential direction with respect to the line AO to be connected. Thereby, it has a structure in which a foreign substance does not easily enter the knuckle 21 from the through hole 51. Further, in this embodiment, in addition to the seal member 29 attached to the axially outer end inner diameter surface of the outer ring 24 of the single row angular contact ball bearing 23, the axially inner end inner diameter surface is also sealed with a seal member (seal Means) 29 is mounted, and seal members 29 are provided at both ends of each single row angular ball bearing 23 in the axial direction.

このように本実施形態では、外方部材としてのナックル（固定側）２１の２列の単列アンギュラ玉軸受２３の各転動体列間の壁部に周方向に略等間隔で複数の貫通穴５１を形成しているので、軸受機能に影響を与えることなく、車輪支持用軸受装置５０の軽量化を図ることができる。   As described above, in the present embodiment, a plurality of through holes are provided at substantially equal intervals in the circumferential direction in the wall portion between the rolling element rows of the two rows of single row angular ball bearings 23 of the knuckle (fixed side) 21 as the outer member. 51 is formed, it is possible to reduce the weight of the wheel supporting bearing device 50 without affecting the bearing function.

また、貫通穴５１の構造がナックル２１内に異物が侵入しにくい構造とされていると共に、単列アンギュラ玉軸受２３の外輪２４の軸方向内側の端部内径面にもシール部材（シール手段）２９を装着しているので、貫通穴５１からナックル２１内の単列アンギュラ玉軸受２３の軸受空間に塵埃、水、泥水等が侵入するのを防止することができ、しかも各単列アンギュラ玉軸受２３の軸方向の両端部にそれぞれシール部材２９が設けられているので、軸受空間から封入グリースが漏洩するのを防止することができる。   In addition, the through hole 51 has a structure in which foreign matter does not easily enter the knuckle 21, and a seal member (seal means) is also provided on the inner diameter surface of the inner end of the outer ring 24 of the single-row angular contact ball bearing 23 in the axial direction. 29 is installed, so that dust, water, muddy water, etc. can be prevented from entering the bearing space of the single row angular ball bearing 23 in the knuckle 21 from the through hole 51, and each single row angular ball bearing. Since the seal members 29 are provided at both ends in the axial direction of the seal 23, it is possible to prevent the sealed grease from leaking from the bearing space.

なお、本実施形態では、ナックル（固定側）２１の２列の単列アンギュラ玉軸受２３の各転動体列間の壁部に周方向に略等間隔で複数の貫通穴５１を形成した場合を例に採ったが、これに代えて、図３に示すように、ナックル２１の２列の単列アンギュラ玉軸受２３の各転動体列間の壁部に周方向に略等間隔で複数の凹部５２を形成することによっても上記同様の作用効果を得ることができる。この場合、ナックル２１の外周壁は閉塞されることとなるので、各単列アンギュラ玉軸受２３の外輪２４の軸方向内側の端部内径面に装着するシール部材２９は省略してもよい。   In the present embodiment, a case where a plurality of through holes 51 are formed at substantially equal intervals in the circumferential direction on the wall portion between the rolling element rows of the two rows of single row angular contact ball bearings 23 of the knuckle (fixed side) 21. Although taken as an example, instead of this, as shown in FIG. 3, a plurality of concave portions are provided at substantially equal intervals in the circumferential direction on the wall portion between the rolling element rows of the two rows of single row angular ball bearings 23 of the knuckle 21. By forming 52, the same effect as described above can be obtained. In this case, since the outer peripheral wall of the knuckle 21 is closed, the seal member 29 attached to the inner diameter surface of the inner end of the outer ring 24 of each single-row angular ball bearing 23 in the axial direction may be omitted.

また、本実施形態では、単列アンギュラ玉軸受２３にシール部材２９を内蔵しているが、外装タイプのシール部材を採用しても良い。また、シール部材を内輪側に装着するようにしても良い。   In this embodiment, the seal member 29 is built in the single-row angular contact ball bearing 23, but an exterior type seal member may be adopted. Further, the seal member may be mounted on the inner ring side.

次に、本発明の第２実施形態である車輪支持用軸受装置を図４に基づいて説明する。
本発明の第２実施形態である車輪支持用軸受装置６０は、既に図１１で説明した車輪支持用軸受装置３０に本発明を適用したものであり、図４に示すように外方部材としてのハブ（回転側）３１の２列の単列アンギュラ玉軸受３３の各転動体列間の壁部に、上記第１の実施の形態と同様に、周方向に略等間隔で複数の貫通穴５１が形成されている。 Next, a wheel support bearing device according to a second embodiment of the present invention will be described with reference to FIG.
The wheel support bearing device 60 according to the second embodiment of the present invention is the one in which the present invention is applied to the wheel support bearing device 30 already described with reference to FIG. 11, and as an outer member as shown in FIG. As in the first embodiment, a plurality of through holes 51 are formed at substantially equal intervals in the circumferential direction in the wall portion between the rolling element rows of the two rows of single row angular ball bearings 33 of the hub (rotation side) 31. Is formed.

また、本実施形態では、インボード側に配置された単列アンギュラ玉軸受３３において、外輪３４の軸方向外側の端部内径面に装着されたシール部材３９に加えて、軸方向内側の端部内径面にもシール部材（シール手段）３９が装着されて各単列アンギュラ玉軸受３３の軸方向の両端部にそれぞれシール部材３９が設けられている。また、アウトボード側に配置された単列アンギュラ玉軸受３３において、外輪３４の軸方向内側の端部内径面にシール部材３９が装着されている。   Further, in the present embodiment, in the single row angular contact ball bearing 33 arranged on the inboard side, in addition to the seal member 39 mounted on the inner diameter surface of the outer end portion of the outer ring 34 in the axial direction, the end portion on the inner side in the axial direction Seal members (seal means) 39 are also mounted on the inner diameter surface, and seal members 39 are provided at both ends in the axial direction of each single-row angular ball bearing 33. Further, in the single-row angular contact ball bearing 33 arranged on the outboard side, a seal member 39 is mounted on the inner diameter surface of the outer ring 34 on the inner side in the axial direction.

このように本実施形態では、外方部材としてのハブ（回転側）３１の２列の単列アンギュラ玉軸受３３の各転動体列間の壁部に周方向に略等間隔で複数の貫通穴５１を形成しているので、軸受機能に影響を与えることなく、車輪支持用軸受装置６０の軽量化を図ることができる。   As described above, in this embodiment, a plurality of through holes are provided at substantially equal intervals in the circumferential direction on the wall portion between the rolling element rows of the two rows of single row angular contact ball bearings 33 of the hub (rotation side) 31 as the outer member. Since 51 is formed, the wheel support bearing device 60 can be reduced in weight without affecting the bearing function.

また、貫通穴５１の構造がハブ３１内に異物が侵入しにくい構造とされていると共に、単列アンギュラ玉軸受３３の外輪３４の軸方向内側の端部内径面にもシール部材（シール手段）３９を装着しているので、貫通穴５１からハブ３１内の単列アンギュラ玉軸受３３の軸受空間に塵埃、水、泥水等が侵入するのを防止することができる。しかも、インボード側の単列アンギュラ玉軸受３３の軸方向の両端部にそれぞれシール部材３９が設けられているので、軸受空間から封入グリースが漏洩するのを防止することができる。   In addition, the structure of the through hole 51 is such that foreign matter is less likely to enter the hub 31, and a seal member (seal means) is also provided on the inner diameter surface of the inner end of the outer ring 34 of the single-row angular contact ball bearing 33 in the axial direction. Since 39 is mounted, it is possible to prevent dust, water, muddy water, and the like from entering the bearing space of the single-row angular contact ball bearing 33 in the hub 31 from the through hole 51. In addition, since the seal members 39 are provided at both ends in the axial direction of the single row angular contact ball bearing 33 on the inboard side, it is possible to prevent the sealed grease from leaking from the bearing space.

なお、本実施形態では、ハブ（回転側）３１の２列の単列アンギュラ玉軸受３３の各転動体列間の壁部に周方向に略等間隔で複数の貫通穴５１を形成した場合を例に採ったが、これに代えて、上記第１実施形態と同様に、ハブ３１の２列の単列アンギュラ玉軸受３３の各転動体列間の壁部に周方向に略等間隔で複数の凹部５２を形成することによっても上記同様の作用効果を得ることができる。この場合、ハブ３１の外周壁は閉塞されることとなるので、各単列アンギュラ玉軸受３３の外輪３４の軸方向内側の端部内径面に装着するシール部材３９は省略しても良い。   In the present embodiment, a case where a plurality of through holes 51 are formed at substantially equal intervals in the circumferential direction on the wall portion between the rolling element rows of the two rows of single row angular contact ball bearings 33 of the hub (rotation side) 31 is described. Although taken as an example, instead of this, in the same manner as in the first embodiment, a plurality of circumferentially arranged wall portions between two rolling element rows of the two rows of single row angular ball bearings 33 of the hub 31 are provided at substantially equal intervals. The same effect as described above can also be obtained by forming the recess 52. In this case, since the outer peripheral wall of the hub 31 is closed, the seal member 39 to be mounted on the inner diameter surface of the inner end of the outer ring 34 of each single-row angular ball bearing 33 in the axial direction may be omitted.

次に、本発明の第３実施形態である車輪支持用軸受装置を図５に基づいて説明する。
本発明の第３実施形態である車輪支持用軸受装置７０は、既に図１１で説明した車輪支持用軸受装置３０に本発明を適用したものであり、図５に示すように外方部材としてのハブ（回転側）３１の２列の単列アンギュラ玉軸受３３の各転動体列間の壁部に周方向に略等間隔で複数の貫通穴５１ａが形成されている。 Next, a wheel support bearing device according to a third embodiment of the present invention will be described with reference to FIG.
The wheel support bearing device 70 according to the third embodiment of the present invention is the one in which the present invention is applied to the wheel support bearing device 30 already described with reference to FIG. 11, and as shown in FIG. A plurality of through holes 51 a are formed at substantially equal intervals in the circumferential direction in the wall portion between the rolling element rows of the two rows of single row angular ball bearings 33 of the hub (rotation side) 31.

貫通穴５１ａはハブ３１の軸方向に長い長穴形状とされており、上記第１及び第２の実施の形態と相違して、ハブ３１の径方向にストレートに貫通している。そして、各貫通穴５１ａは例えばアルミニウム等の軽量な材料で形成されたカバー（シール手段）７１によって閉塞されている。   The through-hole 51a has a long hole shape that is long in the axial direction of the hub 31, and unlike the first and second embodiments, it penetrates straight in the radial direction of the hub 31. Each through hole 51a is closed by a cover (sealing means) 71 formed of a light material such as aluminum.

このように本実施形態では、外方部材としてのハブ（回転側）３１の２列の単列アンギュラ玉軸受３３の各転動体列間の壁部に周方向に略等間隔で複数の貫通穴５１ａを形成しているので、軸受機能に影響を与えることなく、車輪支持用軸受装置７０の軽量化を図ることができる。   As described above, in this embodiment, a plurality of through holes are provided at substantially equal intervals in the circumferential direction on the wall portion between the rolling element rows of the two rows of single row angular contact ball bearings 33 of the hub (rotation side) 31 as the outer member. Since 51a is formed, the wheel support bearing device 70 can be reduced in weight without affecting the bearing function.

また、各貫通穴５１ａがカバー７１によって閉塞されているので、貫通穴５１ａからハブ３１内の単列アンギュラ玉軸受３３の軸受空間に塵埃、水、泥水等が侵入するのを防止することができる。従って、本実施形態では、各単列アンギュラ玉軸受３３の外輪３４の軸方向内側の端部内径面へのシール部材３９の装着を省略することができる。   Further, since each through hole 51a is closed by the cover 71, it is possible to prevent dust, water, muddy water and the like from entering the bearing space of the single row angular contact ball bearing 33 in the hub 31 from the through hole 51a. . Therefore, in this embodiment, it is possible to omit the mounting of the seal member 39 on the inner diameter surface of the inner end portion of the outer ring 34 of each single row angular ball bearing 33 in the axial direction.

なお、本発明は上記各実施の形態に限定されるものでなく、本発明の要旨を逸脱しない範囲において適宜な変形，改良等が可能である。例えば、上記各実施形態では、単列アンギュラ玉軸受２３，３３のシール部材２９，３９として接触式のシール部材を例示したが、例えば競技用車両で雨天時は走行しない等、車両の使用条件が特殊な場合であれば、シール部材として非接触のスリンガー等を採用しても良い。   The present invention is not limited to the above-described embodiments, and appropriate modifications and improvements can be made without departing from the scope of the present invention. For example, in each of the above embodiments, the contact-type seal members are exemplified as the seal members 29 and 39 of the single-row angular ball bearings 23 and 33. In a special case, a non-contact slinger or the like may be employed as the seal member.

また、上記各実施形態では、内輪回転の従動輪用及び外輪回転の従動輪用の車輪支持用軸受装置を例に採ったが、内輪回転の駆動輪用及び外輪回転の駆動輪用の車輪支持用軸受装置に本発明を適用しても良いのは勿論である。   In each of the above embodiments, the wheel support bearing device for the driven wheel for inner ring rotation and the driven wheel for outer wheel rotation is taken as an example, but the wheel support for the driving wheel for inner ring rotation and the driving wheel for outer wheel rotation is taken. Of course, the present invention may be applied to a bearing device for a vehicle.

また、上記各実施形態では、軸受部として２列の単列アンギュラ玉軸受を例示したが、これに代えて、図６に示すように軸受部として２列の単列円すいころ軸受８０やその他の転がり軸受を採用しても良い。   Moreover, in each said embodiment, although the double row single row angular contact ball bearing was illustrated as a bearing part, it replaces with this, and as shown in FIG. 6, a double row single row tapered roller bearing 80 or other as shown in FIG. A rolling bearing may be adopted.

更に、上記各実施形態では、軸受部として２列の単列アンギュラ玉軸受を例示したが、これに代えて、図７及び図８に示すように、内輪が軸方向の略中央部で分割された複列の転がり軸受や、図９に示すようにハブ論４の端部に内輪５が外嵌された複列の転がり軸受を備えた車輪支持用軸受装置に本発明を適用しても良い。なお、図８及び図９の場合は、外方部材の複列軸受部の各転動体間に位置する部分に懸架装置取付用フランジ２が設けられているので、円周方向の懸架装置取付用フランジ２のない位置に貫通穴や凹部を形成する。   Furthermore, in each of the above embodiments, two rows of single-row angular contact ball bearings have been exemplified as the bearing portion. Instead, as shown in FIGS. 7 and 8, the inner ring is divided at a substantially central portion in the axial direction. The present invention may be applied to a double-row rolling bearing or a wheel-supporting bearing device including a double-row rolling bearing having an inner ring 5 fitted to the end of the hub theory 4 as shown in FIG. . In the case of FIGS. 8 and 9, the suspension device mounting flange 2 is provided in a portion located between the rolling elements of the double-row bearing portion of the outer member, so that the suspension device is mounted in the circumferential direction. A through hole or a recess is formed at a position where the flange 2 is not present.

その他、前述した各実施形態において例示した内方部材、外方部材、転動体、軸受部、貫通穴、凹部、シール手段等の材質，形状，寸法，形態，数，配置個所等は本発明を達成できるものであれば任意であり、限定されない。   In addition, the materials, shapes, dimensions, forms, numbers, locations, etc. of the inner members, outer members, rolling elements, bearings, through holes, recesses, sealing means, etc. exemplified in the above-described embodiments are the present invention. Anything that can be achieved is optional and is not limited.

本発明の第１実施形態である車輪支持用軸受装置を説明するための断面図である。It is sectional drawing for demonstrating the wheel support bearing apparatus which is 1st Embodiment of this invention. 貫通穴の一例を説明するための断面図である。It is sectional drawing for demonstrating an example of a through hole. 凹部の一例を説明するための断面図である。It is sectional drawing for demonstrating an example of a recessed part. 本発明の第２実施形態である車輪支持用軸受装置を説明するための断面図である。It is sectional drawing for demonstrating the wheel support bearing apparatus which is 2nd Embodiment of this invention. 本発明の第３実施形態である車輪支持用軸受装置を説明するための断面図である。It is sectional drawing for demonstrating the wheel support bearing apparatus which is 3rd Embodiment of this invention. 本発明の第４実施形態である車輪支持用軸受装置を説明するための断面図である。It is sectional drawing for demonstrating the wheel support bearing apparatus which is 4th Embodiment of this invention. 本発明の第５実施形態である車輪支持用軸受装置を説明するための断面図である。It is sectional drawing for demonstrating the wheel support bearing apparatus which is 5th Embodiment of this invention. 本発明の第６実施形態である車輪支持用軸受装置を説明するための断面図である。It is sectional drawing for demonstrating the wheel support bearing apparatus which is 6th Embodiment of this invention. 従来の車輪支持用軸受装置を説明するための断面図である。It is sectional drawing for demonstrating the conventional wheel support bearing apparatus. 従来の他の車輪支持用軸受装置を説明するための断面図である。It is sectional drawing for demonstrating the other conventional wheel support bearing apparatus. 従来の他の車輪支持用軸受装置を説明するための断面図である。It is sectional drawing for demonstrating the other conventional wheel support bearing apparatus.

符号の説明Explanation of symbols

２１ ナックル（外方部材：固定側）
２２ ハブ（内方部材：回転側）
２３，３３ アンギュラ玉軸受（軸受部）
２６，３６ 転動体
２９，３９ シール部材（シール手段）
３１ ハブ（外方部材：回転側）
３２ ナックル（内方部材：固定側）
５０，６０，７０ 車輪支持用軸受装置
５１ 貫通穴
５２ 凹部
７１ カバー（シール手段） 21 knuckle (outer member: fixed side)
22 Hub (inner member: rotating side)
23,33 Angular contact ball bearing (bearing part)
26, 36 Rolling elements 29, 39 Seal members (sealing means)
31 Hub (outer member: rotating side)
32 knuckle (inner member: fixed side)
50, 60, 70 Wheel support bearing device 51 Through hole 52 Recess 71 Cover (sealing means)

Claims (2)

内方部材と外方部材との間に少なくとも転動体を有する複列又は単列２列の軸受部が配設された車輪支持用軸受装置であって、
前記外方部材の前記複列の軸受部又は前記単列２列の軸受部の前記各転動体列間に位置する壁部に周方向に所定の間隔で複数の貫通穴又は凹部を設けたことを特徴とする車輪支持用軸受装置。 A wheel support bearing device in which a double-row or single-row two-row bearing portion having at least rolling elements is disposed between an inner member and an outer member,
A plurality of through holes or recesses are provided at predetermined intervals in the circumferential direction on the wall portion located between the rolling element rows of the double row bearing portion or the single row and two row bearing portions of the outer member. A bearing device for supporting a wheel. 前記貫通穴又は前記軸受部の軸方向内方にシール手段を設けたことを特徴とする請求項１に記載した車輪支持用軸受装置。   The wheel support bearing device according to claim 1, wherein sealing means is provided in an axially inward direction of the through hole or the bearing portion.
JP2004268395A 2004-09-15 2004-09-15 Bearing device for supporting wheel Pending JP2006083922A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017155822A (en) * 2016-03-01 2017-09-07 Ntn株式会社 Seal-provided bearing
JP2017155818A (en) * 2016-03-01 2017-09-07 Ntn株式会社 Ball bearing
WO2017150609A1 (en) * 2016-03-01 2017-09-08 Ntn株式会社 Seal-equipped bearing, and ball bearing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017155822A (en) * 2016-03-01 2017-09-07 Ntn株式会社 Seal-provided bearing
JP2017155818A (en) * 2016-03-01 2017-09-07 Ntn株式会社 Ball bearing
WO2017150609A1 (en) * 2016-03-01 2017-09-08 Ntn株式会社 Seal-equipped bearing, and ball bearing

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