JP2017072217A - Hub unit bearing - Google Patents

Hub unit bearing Download PDF

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JP2017072217A
JP2017072217A JP2015200342A JP2015200342A JP2017072217A JP 2017072217 A JP2017072217 A JP 2017072217A JP 2015200342 A JP2015200342 A JP 2015200342A JP 2015200342 A JP2015200342 A JP 2015200342A JP 2017072217 A JP2017072217 A JP 2017072217A
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Prior art keywords
axial direction
ring
fitted
peripheral surface
seal
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良雄 神谷
Yoshio Kamiya
良雄 神谷
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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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/768—Sealings of ball or roller bearings between relatively stationary parts, i.e. static seals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
    • F16C33/7883—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring mounted to the inner race and of generally L-shape, the two sealing rings defining a sealing with box-shaped cross-section
    • 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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles

Abstract

PROBLEM TO BE SOLVED: To provide a hub unit bearing in which a fitting surface of a seal member is not fitted into a fitting surface of a bearing ring over an entire area in an axial direction, to thereby prevent deterioration of engagement performance and water cutoff performance of the seal member.SOLUTION: A nonmagnetic cap 43 is provided at an end part on an axial inside of an outer ring 1. The nonmagnetic cap 43 includes: a cylindrical part 44 contacting with a first contact part 2 on the axial inside of the outer ring 1; and a nose gasket 50 that is provided at a step part 46 formed with a step from an end part on the axial inside of the cylindrical part 44 through an R-shaped part 45, and contacting with a second contact part 3 on the axial inside of the outer ring 1. The cylindrical part 44 contacts with the first contact part 2 in an area close to an axial outside with respect to a boundary position between the cylindrical part and the R-shaped part 45.SELECTED DRAWING: Figure 2

Description

本発明は、いずれか一方の軌道輪の軸方向内側の端部にシール部材を嵌合して備えているハブユニット軸受に関するものである。
なお、本願の明細書及び特許請求の範囲において、軸方向に関して「内」とは、ハブユニット軸受を懸架装置に組み付けた状態で車体の幅方向中央寄りとなる側を言い、各図の右側となる。反対に、軸方向に関して「外」とは、車体の幅方向外寄りとなる側を言い、各図の左側となる。 The present invention relates to a hub unit bearing provided with a seal member fitted to an axially inner end portion of any one of the race rings.
In the specification and claims of the present application, “inside” in the axial direction means the side closer to the center in the width direction of the vehicle body when the hub unit bearing is assembled to the suspension device, Become. On the other hand, “outside” in the axial direction refers to the side of the vehicle body that is outside in the width direction, and is the left side of each figure.

従来、図５に示すように、外輪１００における軸方向内側の端部内周面に、シール部材の一つとして、非磁性のオーステナイト系ステンレス鋼板からプレス加工にて有底円筒状に形成された非磁性キャップ２００を嵌合固定してなるハブユニット軸受が提案されている。
非磁性キャップ２００は、例えば、円筒部２０１と円板部２０２との間に段差部２０３を備え、その段差部２０３の外周面にノーズガスケット２０４を加硫成形してなる非磁性キャップがあり、前記円筒部２０１を、外輪１００の端部内周面に嵌合固定するとともに、ノーズガスケット２０４を前記外輪１００の端部内周面に当接させている（特許文献１参照。）。 Conventionally, as shown in FIG. 5, a non-magnetic austenitic stainless steel plate formed as a bottomed cylindrical shape by pressing from a nonmagnetic austenitic stainless steel plate as one of the sealing members on the inner circumferential surface of the inner end in the axial direction of the outer ring 100. A hub unit bearing formed by fitting and fixing a magnetic cap 200 has been proposed.
The non-magnetic cap 200 includes, for example, a non-magnetic cap that includes a step portion 203 between the cylindrical portion 201 and the disc portion 202, and a vulcanization molding of a nose gasket 204 on the outer peripheral surface of the step portion 203. The cylindrical portion 201 is fitted and fixed to the inner peripheral surface of the end portion of the outer ring 100, and the nose gasket 204 is brought into contact with the inner peripheral surface of the end portion of the outer ring 100 (see Patent Document 1).

特許文献１では、非磁性キャップ２００の円筒部２０１が嵌合する外輪１００の内周面１０１と、ノーズガスケット２０４が当接する外輪１００の内周面１０２とに径差が付けられている。すなわち、非磁性キャップ２００の円筒部２０１が嵌合する外輪１００の内周面１０１に比して、ノーズガスケット２０４が当接する外輪１００の内周面１０２を大径に形成している。
これにより、非磁性キャップ２００を外輪１００に圧入する際の非磁性キャップ２００の円筒部２０１の外周面と非磁性キャップ圧入面（外輪１００の内周面１０１）との軸方向圧入距離を減らし、非磁性キャップ２００の円筒部２０１の外周面に発生する軸方向の傷を軽減している。 In Patent Document 1, a diameter difference is provided between the inner peripheral surface 101 of the outer ring 100 to which the cylindrical portion 201 of the nonmagnetic cap 200 is fitted and the inner peripheral surface 102 of the outer ring 100 to which the nose gasket 204 abuts. That is, the inner peripheral surface 102 of the outer ring 100 with which the nose gasket 204 abuts has a larger diameter than the inner peripheral surface 101 of the outer ring 100 with which the cylindrical portion 201 of the nonmagnetic cap 200 is fitted.
This reduces the axial press-fitting distance between the outer peripheral surface of the cylindrical portion 201 of the non-magnetic cap 200 and the non-magnetic cap press-fitting surface (the inner peripheral surface 101 of the outer ring 100) when the non-magnetic cap 200 is press-fitted into the outer ring 100. Axial scratches generated on the outer peripheral surface of the cylindrical portion 201 of the nonmagnetic cap 200 are reduced.

しかし、特許文献１に開示の構造の場合、非磁性キャップ２００の円筒部２０１の外周面の全領域が非磁性キャップ圧入面（外輪１００の内周面１０１）に嵌合されているものである（図５参照。）。非磁性キャップ２００は、嵌合された後も軸方向に移動するため、図５に示すような構成であると、軸方向傷が軸方向に貫通し、捲れ上がるような傷となり易い。
そして、このような傷が発生することで、非磁性キャップ２００の嵌合領域における係止性能や止水性能が低下する虞がある。
また、内輪外周面にエンコーダを備えている場合、圧入後の非磁性キャップの傾きが大きくなり、非磁性キャップとエンコーダ表面とのエアギャップが不安定になる、などの現象が発生する虞を有していた。 However, in the case of the structure disclosed in Patent Document 1, the entire region of the outer peripheral surface of the cylindrical portion 201 of the nonmagnetic cap 200 is fitted to the nonmagnetic cap press-fitting surface (the inner peripheral surface 101 of the outer ring 100). (See FIG. 5). Since the non-magnetic cap 200 moves in the axial direction even after being fitted, the configuration shown in FIG. 5 is likely to cause a scratch that penetrates in the axial direction and rises.
And when such a damage | wound generate | occur | produces, there exists a possibility that the locking performance in the fitting area | region of the nonmagnetic cap 200 and a water stop performance may fall.
In addition, when an encoder is provided on the outer peripheral surface of the inner ring, there is a risk that the nonmagnetic cap tilts after press-fitting will increase and the air gap between the nonmagnetic cap and the encoder surface will become unstable. Was.

特開２０１５−０６８４５４号公報Japanese Patent Laying-Open No. 2015-068454

本発明は従来技術の有するこのような問題点を解決するためになされたものであり、その課題とするところは、シール部材の嵌合面が軌道輪の嵌合面に対して軸方向全域で嵌合していないハブユニット軸受を提供し、シール部材の係止性能や止水性能の低下を防止し、さらに、嵌合後のシール部材の傾きを防止して、姿勢を安定させることにある。   The present invention has been made to solve such problems of the prior art, and the problem is that the fitting surface of the seal member is in the entire axial direction with respect to the fitting surface of the race ring. To provide a hub unit bearing that is not fitted, to prevent a decrease in locking performance and water-stopping performance of the seal member, and to prevent inclination of the seal member after fitting to stabilize the posture. .

この目的を達成するために、第１の本発明は、相対回転可能に備えられた一対の軌道輪を有し、
前記いずれか一方の軌道輪の軸方向内側の端部にはシール部材が備えられ、
前記シール部材が、前記軌道輪の軸方向内側の端部に嵌合する嵌合部と、前記嵌合部の軸方向内側の端部に形成されたＲ状部と、前記軌道輪の軸方向内側の端部に当接する弾性部とを含んでなるハブユニット軸受であって、
前記軌道輪の軸方向内側の端部は、前記嵌合部が嵌合する第一当接部と、
前記第一当接部よりも軸方向内側に位置し、前記弾性部が当接する第二当接部が設けられ、
前記嵌合部は、前記Ｒ状部との境界位置よりも軸方向外側寄りの領域にて前記第一当接部と嵌合していることを特徴とするハブユニット軸受としたことである。 In order to achieve this object, the first aspect of the present invention has a pair of bearing rings provided so as to be relatively rotatable,
A seal member is provided at the axially inner end of any one of the bearing rings,
The seal member is fitted to an end portion on the inner side in the axial direction of the bearing ring, an R-shaped portion formed at an end portion on the inner side in the axial direction of the fitting portion, and the axial direction of the bearing ring A hub unit bearing comprising an elastic part abutting against an inner end part,
An end portion on the inner side in the axial direction of the bearing ring includes a first contact portion into which the fitting portion is fitted,
A second abutting portion is provided, which is located on the inner side in the axial direction than the first abutting portion, and the elastic portion abuts.
The fitting portion is a hub unit bearing that is fitted to the first contact portion in a region closer to the outside in the axial direction than the boundary position with the R-shaped portion.

第２の本発明は第１の本発明において、前記軌道輪は、
外輪と、
ハブ輪とハブ輪の外周面に嵌合される別体の内輪、であって、
前記シール部材は、前記外輪の軸方向内側の端部の内周面に備えられているノーズガスケット付きの非磁性キャップである、ことを特徴とするハブユニット軸受としたことである。 A second aspect of the present invention is the first aspect of the present invention, wherein the raceway is
Outer ring,
A separate inner ring fitted to the outer peripheral surface of the hub wheel and the hub wheel,
The seal member is a non-magnetic cap with a nose gasket that is provided on the inner peripheral surface of the axially inner end of the outer ring.

第３の本発明は第１の本発明において、前記軌道輪は、
外輪と、
ハブ輪とハブ輪の外周面に嵌合される別体の内輪、であって、
前記シール部材は、前記別体の内輪の軸方向内側の端部の外周面に備えられているエンコーダシールである、ことを特徴とするハブユニット軸受としたことである。 A third aspect of the present invention is the first aspect of the present invention, wherein the raceway is
Outer ring,
A separate inner ring fitted to the outer peripheral surface of the hub wheel and the hub wheel,
The seal member is an encoder seal provided on an outer peripheral surface of an axially inner end portion of the separate inner ring. The hub unit bearing is characterized in that the seal member is an encoder seal.

本発明によれば、シール部材の嵌合面が軌道輪の嵌合面に対して軸方向全域で嵌合していないハブユニット軸受を提供し、シール部材の係止性能や止水性能の低下を防止し、さらに、嵌合後のシール部材の姿勢を安定し得た。   According to the present invention, a hub unit bearing in which the fitting surface of the seal member is not fitted to the fitting surface of the bearing ring in the entire axial direction is provided, and the locking performance and water stop performance of the sealing member are reduced. In addition, the posture of the sealing member after fitting could be stabilized.

本発明ハブユニット軸受の第一実施形態を示す概略縦断面図である。It is a schematic longitudinal cross-sectional view which shows 1st embodiment of this invention hub unit bearing. 第一実施形態の要部拡大断面図である。It is a principal part expanded sectional view of 1st embodiment. 第二実施形態を示す概略縦断面図である。It is a schematic longitudinal cross-sectional view which shows 2nd embodiment. 第二実施形態の要部拡大断面図である。It is a principal part expanded sectional view of 2nd embodiment. 従来技術の部分拡大断面図である。It is a partial expanded sectional view of a prior art.

以下、本発明ハブユニット軸受の一実施形態について、添付図面を参照して説明する。
図１乃至図２は本発明の第一実施形態、図３乃至図４は本発明の第二実施形態を示す。なお、本実施形態は、本発明の一実施形態であって、何等これに限定解釈されるものではなく本発明の範囲内で設計変更可能である。 Hereinafter, an embodiment of the hub unit bearing of the present invention will be described with reference to the accompanying drawings.
1 to 2 show a first embodiment of the present invention, and FIGS. 3 to 4 show a second embodiment of the present invention. The present embodiment is an embodiment of the present invention, and is not construed as being limited thereto. The design can be changed within the scope of the present invention.

「第一実施形態」
図１は本発明ハブユニット軸受の第一実施形態の概略縦断面図を示す図で、本実施形態では、自動車の懸架装置に固定する取り付け用フランジ５を外周面に備えるとともに、内周面に複列の外輪軌道（静止側軌道面）７，７を備えた外輪（静止側の軌道輪）１と、外周面に車輪を支持するための車輪支持用フランジ２０を備えるとともに、外周面に内輪軌道（回転側軌道面）２１を備えたハブ輪（回転側の軌道輪）１９と、内輪軌道（回転側軌道面）２７を備え、ハブ輪１９の軸方向内側（矢印Ａ１で示すインボード側）の外周面に形成された小径の段部２３に外嵌めされて配される別体の内輪（回転側の軌道輪）２５と、保持器２８，２８に保持され、それぞれの外輪軌道７，７と内輪軌道２１，２７との間に組み込まれる複数個の転動体（玉）２９と、別体の内輪２５の軸方向内側の外周面の肩部に嵌合される環状の芯金部３１を介して保持される磁気エンコーダ３３と、外輪１の軸方向内側の端部の内周面に嵌合されて軸受内空間を密閉する非磁性キャップ（シール部材）４３と、を少なくとも含む従動輪用の車輪支持用ハブユニット軸受を想定している。
なお、図中矢印Ａ２は軸方向外側（アウトボード側）を示し、Ａ３は軸方向、Ａ４は径方向をそれぞれ示す。 "First embodiment"
FIG. 1 is a diagram showing a schematic longitudinal sectional view of a first embodiment of the hub unit bearing of the present invention. In this embodiment, the mounting flange 5 for fixing to a suspension device of an automobile is provided on the outer peripheral surface, and on the inner peripheral surface. The outer ring (stationary-side raceway) 1 provided with double-row outer ring raceways (stationary-side raceway surfaces) 7, a wheel support flange 20 for supporting the wheels on the outer peripheral surface, and the inner ring on the outer peripheral surface A hub ring (rotation-side raceway) 19 provided with a raceway (rotation-side raceway surface) 21 and an inner ring raceway (rotation-side raceway surface) 27 are provided, and the inner side of the hub ring 19 in the axial direction (inboard side indicated by arrow A1). ) Are provided in separate inner rings (rotating-side race rings) 25 and cages 28, 28, which are arranged by being fitted on a small-diameter step portion 23 formed on the outer peripheral surface of the outer ring raceway 7). 7 and a plurality of rolling elements incorporated between the inner ring raceways 21 and 27 Ball) 29, a magnetic encoder 33 held via an annular cored bar 31 fitted to the shoulder on the axially inner peripheral surface of the separate inner ring 25, and an axially inner end of the outer ring 1 A wheel support hub unit bearing for a driven wheel including at least a nonmagnetic cap (seal member) 43 that is fitted to the inner peripheral surface of the portion and seals the bearing inner space is assumed.
In the figure, arrow A2 indicates the axially outer side (outboard side), A3 indicates the axial direction, and A4 indicates the radial direction.

本実施形態では、外輪１における軸方向内側の端部と非磁性キャップ４３との嵌合構造において特徴的な構成を有するものであって、その他の構成、すなわち、ハブ輪１９、別体の内輪２５、保持器２８、転動体２９、エンコーダ３３などの構成は、特に図示形態に限定解釈されるものではなく本発明の範囲内で適宜設計変更可能である。また、その他の構成などを備えるものであっても本発明の範囲内である。   In the present embodiment, the outer ring 1 has a characteristic structure in the fitting structure between the axially inner end portion and the nonmagnetic cap 43. The other structure, that is, the hub ring 19 and the separate inner ring are provided. 25, the retainer 28, the rolling element 29, the encoder 33, and the like are not particularly limited to the illustrated form, and can be appropriately changed in design within the scope of the present invention. Moreover, even if it comprises other structures etc., it is within the scope of the present invention.

外輪１は、軸方向内側の端部の内周面において、軸方向外側寄りに第一当接部２、第一当接部２の軸方向内側に隣接して第二当接部３を備えている（図２参照。）。   The outer ring 1 includes a first abutting portion 2 on the inner peripheral surface of the end portion on the inner side in the axial direction and a second abutting portion 3 adjacent to the inner side in the axial direction of the first abutting portion 2 on the outer side in the axial direction. (See FIG. 2).

第一当接部２は、非磁性キャップ４３の円筒部４４が嵌合する領域で、第二当接部３は、前記第一当接部２よりも軸方向内側に位置し、非磁性キャップ４３に備えられる弾性部（ノーズガスケット）５０が当接する領域である。   The first contact portion 2 is a region where the cylindrical portion 44 of the nonmagnetic cap 43 is fitted, and the second contact portion 3 is located on the inner side in the axial direction than the first contact portion 2, and the nonmagnetic cap This is a region where an elastic portion (nose gasket) 50 provided in 43 abuts.

第一当接部２と第二当接部３とには径差が付けられている。すなわち、非磁性キャップ４３の円筒部４４が嵌合する第一当接部２に比して、ノーズガスケット５０が当接する第二当接部３を大径に形成している（図２参照。）。すなわち、第一当接部２の内径をＲ１とし、第二当接部３の内径をＲ２としたときに、Ｒ１＜Ｒ２の関係を有している（図２参照。）。
なお、第一当接部２と第二当接部３の径差は、第一当接部２と円筒部４４の締め代より若干大きい程度であればよい。 The first contact portion 2 and the second contact portion 3 have a diameter difference. That is, the second contact portion 3 with which the nose gasket 50 contacts is formed to have a larger diameter than the first contact portion 2 with which the cylindrical portion 44 of the nonmagnetic cap 43 is fitted (see FIG. 2). ). That is, when the inner diameter of the first abutting portion 2 is R1 and the inner diameter of the second abutting portion 3 is R2, there is a relationship of R1 <R2 (see FIG. 2).
Note that the diameter difference between the first contact portion 2 and the second contact portion 3 only needs to be slightly larger than the fastening allowance between the first contact portion 2 and the cylindrical portion 44.

また、本実施形態において第二当接部３には、ノーズガスケット５０の本体部５０ａの表面が広い範囲にわたって当接（圧接）する第一シール領域３ａと、ノーズガスケット５０のリップ部５０ｂが当接（圧接）する第二シール領域３ｂとを備えている。
本実施形態において、第一シール領域３ａは円筒状に形成され、第二シール領域３ｂは、第一シール領域３ａよりも大径のテーパ状（円すい台状）に形成されている。 Further, in the present embodiment, the second contact portion 3 is contacted with the first seal region 3a where the surface of the main body portion 50a of the nose gasket 50 contacts (pressure contact) over a wide range and the lip portion 50b of the nose gasket 50. And a second seal region 3b in contact (pressure contact).
In the present embodiment, the first seal region 3a is formed in a cylindrical shape, and the second seal region 3b is formed in a tapered shape (conical trapezoidal shape) larger in diameter than the first seal region 3a.

なお、本実施形態では、第一シール領域３ａと第二シール領域３ｂにて第二当接部３が構成されている実施の形態を説明したが、本発明はこれに限定されるものではなく、円筒状の第一シール領域３ａのみからなり、ノーズガスケット５０の本体部５０ａとリップ部５０ｂの双方共に第一シール領域３ａに当接するものとしてもよく、あるいは、テーパ状の第二シール領域３ｂのみからなり、ノーズガスケット５０の本体部５０ａとリップ部５０ｂの双方共に第二シール領域３ｂに当接するものとしてもよく任意に設計変更可能である。   In the present embodiment, the second contact portion 3 is configured by the first seal region 3a and the second seal region 3b. However, the present invention is not limited to this. The cylindrical first seal region 3a alone may be used, and both the body portion 50a and the lip portion 50b of the nose gasket 50 may be in contact with the first seal region 3a, or the tapered second seal region 3b. Both the main body portion 50a and the lip portion 50b of the nose gasket 50 may be in contact with the second seal region 3b, and the design can be arbitrarily changed.

非磁性キャップ４３は、外輪１の軸方向内側の端部の第一当接部２に嵌合する嵌合部として機能する円筒部４４と、前記円筒部（嵌合部）４４の軸方向内側の端部からＲ状部４５を介して段差状に連続して凹設された段差部４６と、段差部４６の軸方向内側の端部から第二Ｒ状部４７を介して連続して径方向に形成された円板部４８とで構成された非磁性材からなるキャップ本体４９と、キャップ本体４９の前記段差部４６に備えられ、前記外輪１の軸方向内側の端部の第二当接部３に当接する弾性部（ノーズガスケット）５０とを含んで構成されている。   The nonmagnetic cap 43 includes a cylindrical portion 44 that functions as a fitting portion that fits into the first abutting portion 2 at the axially inner end of the outer ring 1, and an axially inner side of the cylindrical portion (fitting portion) 44. A stepped portion 46 that is continuously recessed in a stepped shape from the end of the stepped portion via the R-shaped portion 45, and a diameter that is continuous from the end on the axially inner side of the stepped portion 46 via the second R-shaped portion 47. A cap body 49 made of a non-magnetic material composed of a disk portion 48 formed in the direction and a step 46 of the cap body 49, and a second contact of the axially inner end of the outer ring 1. And an elastic portion (nose gasket) 50 that contacts the contact portion 3.

段差部４６は、Ｒ状部４５から連続して形成される円板状構成部４６ａと、円板状構成部４６ａの内径側の端部から水平方向に連続して形成される円筒状構成部４６ｂとによって段差状に構成されている。
なお、段差部４６に代えて、Ｒ状部４５から第二Ｒ状部４７に直接至るテーパ状（部分円すい状）を形成することもできる。 The step portion 46 includes a disc-shaped component 46a formed continuously from the R-shaped portion 45, and a cylindrical component formed continuously from the end on the inner diameter side of the disc-shaped component 46a in the horizontal direction. 46b and a stepped shape.
Instead of the stepped portion 46, a tapered shape (partial cone shape) that directly extends from the R-shaped portion 45 to the second R-shaped portion 47 can be formed.

非磁性キャップ４３を構成する非磁性材は特に限定解釈されるものではなく、オーステナイト系ステンレス鋼板などから構成されているものなど本発明の範囲内において適宜周知の非磁性材を採用することができるものである。   The nonmagnetic material constituting the nonmagnetic cap 43 is not particularly limited, and any well-known nonmagnetic material can be adopted as appropriate within the scope of the present invention, such as one made of an austenitic stainless steel plate or the like. Is.

ノーズガスケット５０は、合成ゴムなどの所定の弾性材からなり、段差部４６の円板状構成部４６ａの軸方向内側面及び円筒状構成部４６ｂの外周面に加硫接着成形され、円筒部４４の外径よりも大径で第二当接部３の第一シール領域３ａに圧接可能な外径（第二当接部３の内径Ｒ２よりも大径）を有している円筒状の本体部５０ａと、本体部５０ａの軸方向内側の外径端部から拡開状（円すい台状）に一体に突設されているリップ部５０ｂとで構成されている。
リップ部５０ｂの最大外径は、第二当接部３における第二シール領域３ｂの内径よりも大きく形成されている。 The nose gasket 50 is made of a predetermined elastic material such as synthetic rubber, and is vulcanized and bonded to the axially inner side surface of the disc-like component 46a of the stepped portion 46 and the outer peripheral surface of the cylindrical component 46b. A cylindrical main body having an outer diameter larger than the outer diameter of the first abutment portion 3 and having an outer diameter (larger than the inner diameter R2 of the second abutting portion 3) that can be pressed against the first seal region 3a of the second abutting portion 3. The portion 50a and a lip portion 50b projecting integrally from the outer diameter end portion on the inner side in the axial direction of the main body portion 50a in an expanded shape (conical trapezoidal shape).
The maximum outer diameter of the lip portion 50 b is formed larger than the inner diameter of the second seal region 3 b in the second contact portion 3.

ノーズガスケット５０は本発明の範囲内で最適な材質を選択可能であり特に限定解釈されるものではない。
なお、図示はしないが、ノーズガスケット５０の本体部５０ａに、リップ部５０ｂとは異なる他のリップ部を突設するものとしてもよく任意である。
また、リップ部５０ｂは、複数個に分岐されて構成されているものであってもよく、また、第二シール領域３ｂに当接するリップ部５０ｂを、本体部５０の外径端部から複数個突設することも可能である。 The nose gasket 50 can select an optimum material within the scope of the present invention, and is not particularly limited.
In addition, although not shown in figure, it is good also as what protrudes in the main-body part 50a of the nose gasket 50 from the other lip part different from the lip part 50b, and is arbitrary.
Further, the lip portion 50b may be divided into a plurality of branches, and a plurality of lip portions 50b that contact the second seal region 3b from the outer diameter end portion of the main body portion 50. It is also possible to project.

本実施形態では、内輪２５の軸方向内側の端部、すなわち、外周面の軸方向内側の端部に磁気エンコーダ３３を嵌合して備えている。磁気エンコーダ３３は、内輪２５の外周面の軸方向内側の端部に嵌合される芯金部３１を介して備えられている。本実施形態の磁気エンコーダ３３は、ゴム等に磁性粉体が混入され、軸方向の面部にて周方向にわたってＳ極・Ｎ極が交互に着磁されてなる周知のアキシアルタイプを想定している。芯金部３１は、鋼板等の磁性金属板をプレス加工により、断面略Ｌ字形で全体を円環状に成形したものであり、内輪２５の外周面に嵌合可能な円筒部３１ａと、円筒部３１ａにおける軸方向内側の端部から径方向で外方に向けて備えられる円環部３１ｂとで構成され、磁気エンコーダ３３は、円環部３１ｂの軸方向内側の面部に備えられている。   In the present embodiment, a magnetic encoder 33 is fitted and provided at the axially inner end of the inner ring 25, that is, the axially inner end of the outer peripheral surface. The magnetic encoder 33 is provided via a cored bar portion 31 that is fitted to an axially inner end portion of the outer peripheral surface of the inner ring 25. The magnetic encoder 33 of the present embodiment is assumed to be a known axial type in which magnetic powder is mixed in rubber or the like, and S and N poles are alternately magnetized in the circumferential direction on the axial surface portion. . The cored bar 31 is formed by pressing a magnetic metal plate such as a steel plate into a generally annular shape with a substantially L-shaped cross section, and a cylindrical part 31 a that can be fitted to the outer peripheral surface of the inner ring 25, and a cylindrical part The magnetic encoder 33 is provided on the axially inner surface portion of the annular portion 31b. The annular portion 31b is provided radially outward from the axially inner end portion of 31a.

本実施形態では、円筒部（嵌合部）４４は、Ｒ状部４５との境界位置（Ｒ止まり）５１よりも軸方向外側寄りの領域にて前記第一当接部２と嵌合し、円筒部４４の軸方向全領域が第一当接部２と嵌合しているわけではないため、非磁性キャップ（シール部材）４３の係止性能や止水性能の低下を防止し、さらに、嵌合後のシール部材（非磁性キャップ４３）の傾きを防止して、姿勢を安定させることが可能である（図２参照。）。図中Ｂ１は非嵌合領域（非当接領域）を示す。
すなわち、本実施形態によれば、非磁性キャップ４３の圧入時に伴う円筒部４４の外周面の軸方向傷が軸方向に貫通し、捲れ上がるような傷になることを防ぐことが可能である。
また、仮に、若干の捲れ上がりを伴う軸方向傷が発生したとしても、非嵌合領域Ｂ１で吸収することができ、非磁性キャップ（シール部材）４３の係止性能や止水性能の低下を防止することができる。
また、圧入後の非磁性キャップ４３の傾きが大きくなり、非磁性キャップ４３と磁気エンコーダ３３表面とのエアギャップが不安定になるといった不具合もない。 In the present embodiment, the cylindrical portion (fitting portion) 44 is fitted to the first contact portion 2 in a region closer to the outer side in the axial direction than the boundary position (R stop) 51 with the R-shaped portion 45, Since the entire area in the axial direction of the cylindrical portion 44 is not fitted to the first abutment portion 2, it is possible to prevent the locking performance and water stop performance of the nonmagnetic cap (seal member) 43 from being lowered, It is possible to prevent the inclination of the sealing member (nonmagnetic cap 43) after fitting and stabilize the posture (see FIG. 2). B1 in the figure indicates a non-fitting region (non-contact region).
In other words, according to the present embodiment, it is possible to prevent the axial scratches on the outer peripheral surface of the cylindrical portion 44 that accompany the press-fitting of the nonmagnetic cap 43 from penetrating in the axial direction, resulting in a scratch that rises.
Further, even if an axial flaw accompanied by a slight bulge occurs, it can be absorbed in the non-fitting region B1, and the locking performance and water stop performance of the non-magnetic cap (seal member) 43 are reduced. Can be prevented.
Further, there is no problem that the inclination of the nonmagnetic cap 43 after press-fitting becomes large and the air gap between the nonmagnetic cap 43 and the surface of the magnetic encoder 33 becomes unstable.

「第二実施形態」
図３及び図４は本発明ハブユニット軸受の第二実施形態で、本実施形態では、シール部材を嵌合配設する軌道輪が内輪（別体の内輪）２５で、シール部材がエンコーダシール６０であり、内輪２５とエンコーダシール６０との嵌合構造に特徴的な構成を有するものであるため、その他の構成、すなわち、外輪１、ハブ輪１９、保持器２８、転動体２９などの構成については周知の構成が採用可能であるためその説明は省略する。本実施形態では、図４（ａ）に示す形態と、図４（ｂ）に示す形態を代表例として図示説明する。 "Second embodiment"
3 and 4 show a second embodiment of the hub unit bearing of the present invention. In this embodiment, the race ring into which the seal member is fitted and disposed is the inner ring (separate inner ring) 25, and the seal member is the encoder seal 60. Since it has a characteristic configuration in the fitting structure between the inner ring 25 and the encoder seal 60, other configurations, that is, the configurations of the outer ring 1, the hub ring 19, the cage 28, the rolling element 29, etc. Since a well-known configuration can be adopted, description thereof will be omitted. In the present embodiment, the embodiment shown in FIG. 4A and the embodiment shown in FIG.

図４（ａ）はエンコーダシール６０の内径リップ６８が、内輪２５の軸方向内側の端部に設けられた第二当接部８２の円筒部８２ａに当接している一実施形態で、図４（ｂ）はエンコーダシール６０の内径リップ６８が、内輪２５の軸方向内側の端部の前記円筒部８２ａよりも軸方向内側にある第二当接部８２の面取部８２ｂに当接している実施の一形態である。
まず、図４（ａ）に示す実施の形態について説明する。 FIG. 4A is an embodiment in which the inner diameter lip 68 of the encoder seal 60 is in contact with the cylindrical portion 82a of the second contact portion 82 provided at the inner end of the inner ring 25 in the axial direction. 7B, the inner diameter lip 68 of the encoder seal 60 is in contact with the chamfered portion 82b of the second contact portion 82 that is axially inner than the cylindrical portion 82a at the inner end of the inner ring 25 in the axial direction. It is one Embodiment.
First, the embodiment shown in FIG. 4A will be described.

内輪２５は、軸方向内側の端部の外周面において、軸方向外側寄りに第一当接部８１、軸方向内側寄りに第二当接部８２（円筒部８２ａ）を備えている（図４（ａ）参照）。   The inner ring 25 includes a first contact portion 81 on the outer side in the axial direction and a second contact portion 82 (cylindrical portion 82a) on the inner side in the axial direction on the outer peripheral surface of the end portion on the inner side in the axial direction (FIG. 4). (See (a)).

第一当接部８１は、エンコーダシール６０を構成するスリンガ部６１の円筒部６２が当接（嵌合）する領域で、円筒状に形成されており、第二当接部８２の円筒部８２ａは、前記第一当接部８１よりも軸方向内側に位置し、スリンガ部６１の内径リップ６８が当接する領域で、円筒状に形成されている。   The first abutting portion 81 is formed in a cylindrical shape in a region where the cylindrical portion 62 of the slinger portion 61 constituting the encoder seal 60 abuts (fits), and the cylindrical portion 82 a of the second abutting portion 82. Is located inward of the first abutting portion 81 in the axial direction and is formed in a cylindrical shape in a region where the inner diameter lip 68 of the slinger portion 61 abuts.

第一当接部８１と第二当接部８２の円筒部８２ａとには径差が付けられている。すなわち、スリンガ部６１の円筒部６２が嵌合する第一当接部８１に比して、内径リップ６８が当接する第二当接部８２の円筒部８２ａを小径に形成している。すなわち、第一当接部８１の外径をＲ３とし、第二当接部８２の円筒部８２ａの外径をＲ４としたときに、Ｒ４＜Ｒ３の関係を有している（図４（ａ）参照。）。   The first contact portion 81 and the cylindrical portion 82a of the second contact portion 82 have a diameter difference. That is, the cylindrical portion 82a of the second abutting portion 82 with which the inner lip 68 abuts has a smaller diameter than the first abutting portion 81 with which the cylindrical portion 62 of the slinger portion 61 is fitted. That is, when the outer diameter of the first abutting portion 81 is R3 and the outer diameter of the cylindrical portion 82a of the second abutting portion 82 is R4, there is a relationship of R4 <R3 (FIG. 4A )reference.).

エンコーダシール６０は、内輪２５の軸方向内側の外周面（第一当接部８１）に嵌合されるスリンガ部６１と、外輪１の軸方向内側の内周面に嵌合される外輪側シール部７０とで構成されている。   The encoder seal 60 includes a slinger portion 61 fitted to the outer circumferential surface (first contact portion 81) on the inner side in the axial direction of the inner ring 25, and an outer ring side seal fitted to the inner circumferential surface on the inner side in the axial direction of the outer ring 1. Part 70.

スリンガ部６１は、マルテンサイト系ステンレス鋼板や防錆処理された圧延鋼板等の磁性金属板をプレス加工により、断面略Ｌ字形で全体を円環状に成形したものであり、内輪２５の第一当接部８１に嵌合可能な円筒部６２と、円筒部６２の軸方向内側寄りの端部からＲ状部６３を介して外方に向けて径方向に連続して形成される大径の円環部６４とで構成された第一の芯金部６５と、第一の芯金部６５の円環部６４の軸方向内側の面部に一体に設けられた磁気エンコーダ６６とで構成されている（図４（ａ））。   The slinger portion 61 is formed by pressing a magnetic metal plate such as a martensitic stainless steel plate or a rust-proof rolled steel plate into a generally annular shape with a substantially L-shaped cross section. A cylindrical portion 62 that can be fitted to the contact portion 81, and a large-diameter circle continuously formed in the radial direction from the end closer to the inner side in the axial direction of the cylindrical portion 62 to the outside via the R-shaped portion 63. The first cored bar part 65 configured by the ring part 64 and the magnetic encoder 66 integrally provided on the axially inner surface part of the annular part 64 of the first cored bar part 65 are configured. (FIG. 4A).

磁気エンコーダ６６は、ゴム等に磁性粉体が混入され、軸方向の面部にて周方向にわたってＳ極・Ｎ極が交互に着磁されてなる周知のアキシアルタイプ構成を本実施形態では採用している。また、本実施形態では、外径側６７は第一の芯金部６５の円環部６４の外径を覆うようにして設けられており、内径側には、内輪２５の円筒部８２ａに当接する内径リップ６８を一体に突設している。
内径リップ６８は、軸方向内側方向（矢印Ａ１の方向）に突出し、リップ先端に向けて少しずつ小径になるように傾斜状に形成されており、内輪２５の第二当接部８２の円筒部８２ａに圧接可能な程度の径としている。 In this embodiment, the magnetic encoder 66 employs a well-known axial type configuration in which magnetic powder is mixed in rubber or the like, and S poles and N poles are alternately magnetized in the circumferential direction on the axial surface portion. Yes. In the present embodiment, the outer diameter side 67 is provided so as to cover the outer diameter of the annular portion 64 of the first cored bar portion 65, and the inner diameter side is in contact with the cylindrical portion 82 a of the inner ring 25. An inner diameter lip 68 in contact therewith is integrally projected.
The inner diameter lip 68 protrudes inward in the axial direction (in the direction of the arrow A1), and is formed in an inclined shape so that the diameter gradually decreases toward the tip of the lip, and the cylindrical portion of the second contact portion 82 of the inner ring 25 The diameter is such that it can be pressed against 82a.

外輪側シール部７０は、第二の芯金部７３と弾性部７４からなる。第二の芯金部７３は、鋼板等の金属板をプレス加工により、断面略Ｌ字形で全体を円環状に成形したものであり、外輪１の内周面に嵌合可能な円筒部７１と、円筒部７１の軸方向外側方向（矢印Ａ２の方向）寄りの端部から内方に向けて径方向に連続して形成される小径の円環部７２とで構成されている。弾性部７４は、第二の芯金部７３の円環部７２の軸方向外側の面部、円環部７２の内径、円環部７２の軸方向内側の面部、円筒部７１の内周面、及び円筒部７１の軸方向内側の端部を覆うように一体に設けられており、弾性部７４の径方向内側寄りには複数のシールリップ７５が突設されている（図４（ａ））。なお、本実施形態では、円環部７２における軸方向外側の面部の上方領域と、円筒部７１の外周面は弾性部７４によって覆われていない（図４（ａ）参照。）。   The outer ring side seal portion 70 includes a second cored bar portion 73 and an elastic portion 74. The second cored bar 73 is formed by pressing a metal plate such as a steel plate into a generally annular shape with a substantially L-shaped cross section, and a cylindrical part 71 that can be fitted to the inner peripheral surface of the outer ring 1. The cylindrical portion 71 includes a small-diameter annular portion 72 that is continuously formed in the radial direction from the end portion of the cylindrical portion 71 toward the outer side in the axial direction (the direction of the arrow A2). The elastic portion 74 includes an axially outer surface portion of the annular portion 72 of the second core metal portion 73, an inner diameter of the annular portion 72, an axially inner surface portion of the annular portion 72, an inner peripheral surface of the cylindrical portion 71, And it is integrally provided so that the axial direction inner side edge part of the cylindrical part 71 may be covered, and the some seal lip 75 protrudes in the radial direction inner side of the elastic part 74 (FIG. 4 (a)). . In the present embodiment, the region above the axially outer surface portion of the annular portion 72 and the outer peripheral surface of the cylindrical portion 71 are not covered by the elastic portion 74 (see FIG. 4A).

本実施形態においてシールリップ７５は、円環部７２の内径側に位置する弾性部７４から径方向に突設された分岐部７６を介し、軸方向内側に向けて突設される主リップ（メインリップ）７７と、同じく分岐部７６を介し、軸方向外側に向けて突設される副リップ（グリースリップ）７８と、円環部７２の軸方向内側の面部を覆う弾性部７４から一体に径方向で外方に向けて傾斜状に突設される第二副リップ（サイドリップ）７９とで構成されている。   In this embodiment, the seal lip 75 is a main lip projecting inward in the axial direction via a branching portion 76 projecting in a radial direction from an elastic portion 74 located on the inner diameter side of the annular portion 72. Lip) 77, an auxiliary lip (grease lip) 78 projecting outward in the axial direction, similarly through the branching portion 76, and an elastic portion 74 covering the axially inner surface portion of the annular portion 72, and having a diameter integrally. It is comprised with the 2nd sub lip (side lip) 79 which protrudes in the shape of an inclination toward the outside in the direction.

主リップ７７及び副リップ７８は、前記第一の芯金部６５の円筒部６２の外周面に圧接され、第二副リップ７９は、前記第一の芯金部６５の円環部６４における軸方向外側の面部に圧接されている。
また、スリンガ部６１の径方向端部と外輪側シール部７０との間には、径方向で所定の隙間で形成された環状のラビリンス隙間８０を有している。 The main lip 77 and the sub lip 78 are pressed against the outer peripheral surface of the cylindrical portion 62 of the first core metal portion 65, and the second sub lip 79 is a shaft in the annular portion 64 of the first core metal portion 65. It is press-contacted to the surface portion on the outer side in the direction.
An annular labyrinth gap 80 is formed between the radial end of the slinger portion 61 and the outer ring side seal portion 70 with a predetermined gap in the radial direction.

本実施形態では、エンコーダシール６０を構成するスリンガ部６１の円筒部（嵌合部）６２は、Ｒ状部６３との境界位置（Ｒ止まり）よりも軸方向外側寄りの領域にて前記第一当接部８１と嵌合し、円筒部（嵌合部）６２の軸方向全領域が第一当接部８１と嵌合しているわけではない。このため、エンコーダシール（シール部材）６０の係止性能や止水性能の低下を防止し、さらに嵌合後のエンコーダシール６０の傾きを防止して、磁気エンコーダ６６の磁束信号を安定させることが可能である（図４（ａ）参照。）。図中Ｂ１は非嵌合領域（非当接領域）を示す。
すなわち、本実施形態によれば、エンコーダシール６０の圧入時に伴う内周面の軸方向傷が軸方向に貫通し、捲れ上がるような傷になることを防ぐことが可能である。
また、仮に、若干の捲れ上がりを伴う軸方向傷が発生したとしても、非嵌合領域Ｂ１で吸収することができ、エンコーダシール（シール部材）６０の係止性能や止水性能の低下を防止することができる。
また、圧入後のエンコーダシール６０の傾きが大きくなり、止水性能が低下する、あるいはエンコーダ磁束信号が不安定になるといった不具合もない。 In the present embodiment, the cylindrical portion (fitting portion) 62 of the slinger portion 61 constituting the encoder seal 60 is the first portion in a region closer to the outer side in the axial direction than the boundary position (R stop) with the R-shaped portion 63. The entire contact portion 81 is fitted to the first contact portion 81 and the entire axial direction region of the cylindrical portion (fitting portion) 62 is not fitted to the first contact portion 81. For this reason, it is possible to prevent the locking performance and water stopping performance of the encoder seal (seal member) 60 from being deteriorated, and further prevent the encoder seal 60 from being tilted after fitting, thereby stabilizing the magnetic flux signal of the magnetic encoder 66. It is possible (see FIG. 4 (a)). B1 in the figure indicates a non-fitting region (non-contact region).
In other words, according to the present embodiment, it is possible to prevent the axial scratches on the inner peripheral surface that accompany the press-fitting of the encoder seal 60 from penetrating in the axial direction, resulting in a scratch that rises.
Further, even if an axial flaw accompanied by a slight bulge occurs, it can be absorbed in the non-fitting region B1, and the locking performance and water stop performance of the encoder seal (seal member) 60 are prevented from being deteriorated. can do.
In addition, there is no problem that the encoder seal 60 after press-fitting has a large inclination and the water stop performance is deteriorated or the encoder magnetic flux signal becomes unstable.

次に、図４（ｂ）に示す実施の形態について説明する。   Next, the embodiment shown in FIG. 4B will be described.

本実施形態における内輪２５は、軸方向内側の端部の内周面において、軸方向外側寄りに第一当接部８１、第一当接部８１から連続して軸方向内側寄りに第二当接部８２を設けている。第二当接部８２は、第一当接部８１よりも小径で円筒状である円筒部８２ａと、円筒部８２ａの軸方向内側に連続してテーパ面状である面取部８２ｂとにより構成されている（図４（ｂ）参照）。   In the present embodiment, the inner ring 25 has a first contact portion 81 on the inner peripheral surface of the end portion on the inner side in the axial direction and a second contact on the inner side in the axial direction continuously from the first contact portion 81. A contact portion 82 is provided. The second abutting portion 82 includes a cylindrical portion 82a having a smaller diameter than the first abutting portion 81 and a cylindrical shape, and a chamfered portion 82b having a tapered surface continuously inside the cylindrical portion 82a in the axial direction. (See FIG. 4B).

第一当接部８１は、エンコーダシール６０を構成するスリンガ部６１の円筒部６２が嵌合する領域で、第二当接部８２の面取部８２ｂは、前記第一当接部８１よりも軸方向内側に位置し、前記スリンガ部６１の内径リップ６８が当接する領域である。   The first contact portion 81 is a region where the cylindrical portion 62 of the slinger portion 61 constituting the encoder seal 60 is fitted, and the chamfered portion 82 b of the second contact portion 82 is more than the first contact portion 81. It is a region located on the inner side in the axial direction and in contact with the inner diameter lip 68 of the slinger portion 61.

第一当接部８１と第二当接部８２を構成する円筒部８２ａとには径差が付けられている。すなわち、スリンガ部６１の円筒部６２が嵌合する第一当接部８１に比して、円筒部８２ａを小径に形成している（図４（ｂ）参照。）。
すなわち、第一当接部８１の外径をＲ３とし、円筒部８２ａの外径をＲ４としたときに、Ｒ４＜Ｒ３の関係を有している（図４（ｂ）参照。）。
また、本実施形態では、第二当接部８２を構成する面取部８２ｂは、軸方向内側に向けて少しずつ小径になるように形成されたテーパ面としている（図４（ｂ）参照）。
エンコーダシール６０を構成するスリンガ部６１の内径リップ６８は、第二当接部８２である面取部８２ｂに圧接されている。 The first contact portion 81 and the cylindrical portion 82a constituting the second contact portion 82 have a diameter difference. That is, the cylindrical portion 82a is formed to have a smaller diameter than the first contact portion 81 into which the cylindrical portion 62 of the slinger portion 61 is fitted (see FIG. 4B).
That is, when the outer diameter of the first contact portion 81 is R3 and the outer diameter of the cylindrical portion 82a is R4, there is a relationship of R4 <R3 (see FIG. 4B).
In the present embodiment, the chamfered portion 82b constituting the second abutting portion 82 is a tapered surface formed so as to gradually become smaller in diameter toward the inner side in the axial direction (see FIG. 4B). .
The inner diameter lip 68 of the slinger portion 61 constituting the encoder seal 60 is in pressure contact with the chamfered portion 82 b that is the second contact portion 82.

本実施形態のエンコーダシール６０は、図４（ａ）で説明したエンコーダシール６０と同じ構成を採用しているためここでの説明は省略する（図４（ｂ））。   Since the encoder seal 60 of the present embodiment employs the same configuration as the encoder seal 60 described in FIG. 4A, description thereof is omitted here (FIG. 4B).

本実施形態では、エンコーダシール６０を構成するスリンガ部６１の円筒部（嵌合部）６２は、Ｒ状部６３との境界位置（Ｒ止まり）よりも軸方向外側寄りの領域にて前記第一当接部８１と嵌合し、円筒部（嵌合部）６２の軸方向全領域が第一当接部８１と嵌合しているわけではないため、エンコーダシール（シール部材）６０の係止性能や止水性能の低下を防止することが可能である（図４（ｂ）参照。）。図中Ｂ１は非嵌合領域（非当接領域）を示す。本実施形態の非嵌合領域Ｂ１のほうが、図４（ａ）の実施形態の非嵌合領域Ｂ１よりも大きく構成している（図４（ｂ）参照。）。
すなわち、本実施形態によれば、エンコーダシール６０の圧入時に伴う円筒部６２の内周面の軸方向傷が軸方向に貫通し、捲れ上がるような傷になることを防ぐことが可能である。
また、仮に、若干の捲れ上がりを伴う軸方向傷が発生したとしても、非嵌合領域Ｂ１で吸収することができ、エンコーダシール（シール部材）６０の係止性能や止水性能の低下を防止することができる。
また、圧入後のエンコーダシール６０の傾きが大きくなり、止水性能が低下するあるいはエンコーダ磁束信号が不安定になるといった不具合もない。 In the present embodiment, the cylindrical portion (fitting portion) 62 of the slinger portion 61 constituting the encoder seal 60 is the first portion in a region closer to the outer side in the axial direction than the boundary position (R stop) with the R-shaped portion 63. The encoder seal (seal member) 60 is locked because the axial portion of the cylindrical portion (fitting portion) 62 is not fitted with the first abutting portion 81. It is possible to prevent a decrease in performance and water stopping performance (see FIG. 4B). B1 in the figure indicates a non-fitting region (non-contact region). The non-fitting region B1 of the present embodiment is configured to be larger than the non-fitting region B1 of the embodiment of FIG. 4A (see FIG. 4B).
That is, according to the present embodiment, it is possible to prevent an axial scratch on the inner peripheral surface of the cylindrical portion 62 that accompanies the press-fitting of the encoder seal 60 from penetrating in the axial direction and causing a scratch that rises.
Further, even if an axial flaw accompanied by a slight bulge occurs, it can be absorbed in the non-fitting region B1, and the locking performance and water stop performance of the encoder seal (seal member) 60 are prevented from being deteriorated. can do.
In addition, there is no problem that the inclination of the encoder seal 60 after press-fitting becomes large and the water stop performance is deteriorated or the encoder magnetic flux signal becomes unstable.

本発明は、軌道輪における軸方向内側の端部にシール部材を嵌合して備えるその他の形態のハブユニット軸受にも利用可能である。   The present invention can also be used for other types of hub unit bearings that are provided with a seal member fitted to the axially inner end of the race.

１ 外輪（軌道輪）
２ 第一当接部
３ 第二当接部
１９ ハブ輪
２５ 別体の内輪
４３ 非磁性キャップ（シール部材）
４４ 円筒部（嵌合部）
４５ Ｒ状部
４６ 段差部
５０ ノーズガスケット（弾性部）
６０ エンコーダシール（シール部材）
1 Outer ring (Raceway)
2 First contact portion 3 Second contact portion 19 Hub wheel 25 Separate inner ring 43 Non-magnetic cap (seal member)
44 Cylindrical part (fitting part)
45 R-shaped part 46 Step part 50 Nose gasket (elastic part)
60 Encoder seal (seal member)

Claims (3)

相対回転可能に備えられた一対の軌道輪を有し、
前記いずれか一方の軌道輪の軸方向内側の端部にはシール部材が備えられ、
前記シール部材が、前記軌道輪の軸方向内側の端部に嵌合する嵌合部と、前記嵌合部の軸方向内側の端部に形成されたＲ状部と、前記軌道輪の軸方向内側の端部に当接する弾性部とを含んでなるハブユニット軸受であって、
前記軌道輪の軸方向内側の端部は、前記嵌合部が嵌合する第一当接部と、
前記第一当接部よりも軸方向内側に位置し、前記弾性部が当接する第二当接部が設けられ、
前記嵌合部は、前記Ｒ状部との境界位置よりも軸方向外側寄りの領域にて前記第一当接部と嵌合していることを特徴とするハブユニット軸受。 Having a pair of raceways provided for relative rotation;
A seal member is provided at the axially inner end of any one of the bearing rings,
The seal member is fitted to an end portion on the inner side in the axial direction of the bearing ring, an R-shaped portion formed at an end portion on the inner side in the axial direction of the fitting portion, and the axial direction of the bearing ring A hub unit bearing comprising an elastic part abutting against an inner end part,
An end portion on the inner side in the axial direction of the bearing ring includes a first contact portion into which the fitting portion is fitted,
A second abutting portion is provided, which is located on the inner side in the axial direction than the first abutting portion, and the elastic portion abuts.
The hub unit bearing, wherein the fitting portion is fitted to the first contact portion in a region closer to the outside in the axial direction than a boundary position with the R-shaped portion. 前記軌道輪は、
外輪と、
ハブ輪とハブ輪の外周面に嵌合される別体の内輪、であって、
前記シール部材は、前記外輪の軸方向内側の端部の内周面に備えられているノーズガスケット付きの非磁性キャップである、ことを特徴とする請求項１に記載のハブユニット軸受。 The race is
Outer ring,
A separate inner ring fitted to the outer peripheral surface of the hub wheel and the hub wheel,
2. The hub unit bearing according to claim 1, wherein the seal member is a nonmagnetic cap with a nose gasket provided on an inner peripheral surface of an axially inner end portion of the outer ring. 前記軌道輪は、
外輪と、
ハブ輪とハブ輪の外周面に嵌合される別体の内輪、であって、
前記シール部材は、前記別体の内輪の軸方向内側の端部の外周面に備えられているエンコーダシールである、ことを特徴とする請求項１に記載のハブユニット軸受。
The race is
Outer ring,
A separate inner ring fitted to the outer peripheral surface of the hub wheel and the hub wheel,
2. The hub unit bearing according to claim 1, wherein the seal member is an encoder seal provided on an outer peripheral surface of an axially inner end portion of the separate inner ring. 3.
JP2015200342A 2015-10-08 2015-10-08 Hub unit bearing Pending JP2017072217A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015200342A JP2017072217A (en) 2015-10-08 2015-10-08 Hub unit bearing

Publications (1)

Publication Number Publication Date
JP2017072217A true JP2017072217A (en) 2017-04-13

Family

ID=58538185

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2017072217A (en)

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