JP2012202415A - Wheel bearing device equipped with rotational speed detection device - Google Patents

Wheel bearing device equipped with rotational speed detection device Download PDF

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Publication number
JP2012202415A
JP2012202415A JP2011064403A JP2011064403A JP2012202415A JP 2012202415 A JP2012202415 A JP 2012202415A JP 2011064403 A JP2011064403 A JP 2011064403A JP 2011064403 A JP2011064403 A JP 2011064403A JP 2012202415 A JP2012202415 A JP 2012202415A
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Prior art keywords
fitting
rotational speed
protective cover
outer member
speed detection
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JP2011064403A
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Japanese (ja)
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Nobukatsu Uchiyama
暢克 内山
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2011064403A priority Critical patent/JP2012202415A/en
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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
    • F16C33/723—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
    • F16C33/768—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
    • F16C33/76—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
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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

Abstract

PROBLEM TO BE SOLVED: To provide a wheel bearing device equipped with a rotational speed detection device, in which pulling-out resistance of a protective cover is increased by improving ring rigidity thereof.SOLUTION: A protective cover 10 includes: a cylindrical fitting part 10a press-fitted into an end inner periphery of the inner side of an outer member 2; a discoid shielding part 10b extending radially inward from the fitting part 10a and facing a pulser ring 13 with a slight space in an axial direction; and a bottom part 10d for covering the end of the inner side of an inner member 1 from the shielding part 10b via a bent part 10c. The fitting part 10a is formed of: a cylindrical part 17 metal-fitted in a fitting surface 2c formed in the end inner periphery of the inner side of the outer member 2 and having a plate thickness t1 formed thicker than the plate thickness t0 of the other part; and a diameter reduced part 18 extending from the cylindrical part 17 in the axial direction, wherein an elastic member 19 made of synthetic rubber is integrally coupled to the diameter reduced part 18 by vulcanization adhesion.

Description

本発明は、自動車等の車輪を懸架装置に対して回転自在に支承する車輪用軸受装置、特に、車輪の回転速度を検出する回転速度検出装置が内蔵され、保護カバーの環剛性の向上を図った回転速度検出装置付き車輪用軸受装置に関するものである。   The present invention incorporates a wheel bearing device for rotatably supporting a wheel of an automobile or the like with respect to a suspension device, in particular, a rotational speed detection device for detecting the rotational speed of the wheel, thereby improving the ring rigidity of the protective cover. The present invention relates to a wheel bearing device with a rotational speed detection device.

自動車の車輪を懸架装置に対して回転自在に支承すると共に、アンチロックブレーキシステム（ＡＢＳ）を制御し、車輪の回転速度を検出する回転速度検出装置が内蔵された回転速度検出装置付き車輪用軸受装置が一般的に知られている。従来、このような車輪用軸受装置は、転動体を介して転接する内方部材および外方部材の間にシール装置が設けられ、円周方向に磁極を交互に並べてなる磁気エンコーダを前記シール装置に一体化させると共に、磁気エンコーダと、この磁気エンコーダに対面配置され、車輪の回転に伴う磁気エンコーダの磁極変化を検出する回転速度センサとで回転速度検出装置が構成されている。   A wheel bearing with a rotation speed detecting device that rotatably supports a vehicle wheel with respect to a suspension device and controls an anti-lock brake system (ABS) to detect the rotation speed of the wheel. Devices are generally known. Conventionally, in such a wheel bearing device, a sealing device is provided between an inner member and an outer member that are in rolling contact with a rolling element, and a magnetic encoder in which magnetic poles are alternately arranged in a circumferential direction is provided as the sealing device. In addition, the rotational speed detecting device is constituted by a magnetic encoder and a rotational speed sensor that is arranged facing the magnetic encoder and detects a magnetic pole change of the magnetic encoder accompanying the rotation of the wheel.

前記回転速度センサは、懸架装置を構成するナックルに車輪用軸受装置が装着された後、当該ナックルに装着されているものが一般的である。しかし、この回転速度センサと磁気エンコーダとのエアギャップの調整作業の煩雑さを解消すると共に、よりコンパクト化を狙って、最近では回転速度センサをも軸受に内蔵した回転速度検出装置付き車輪用軸受装置が提案されている。   In general, the rotational speed sensor is attached to the knuckle after the wheel bearing device is attached to the knuckle constituting the suspension device. However, in order to eliminate the complexity of adjusting the air gap between the rotational speed sensor and the magnetic encoder and to achieve a more compact design, recently, a bearing for a wheel with a rotational speed detection device that also incorporates the rotational speed sensor in the bearing. A device has been proposed.

このような回転速度検出装置付き車輪用軸受装置の一例として図１０に示すような構造のものが知られている。この回転速度検出装置付き車輪用軸受装置は、内方部材５１と外方部材５２、および両部材５１、５２間に転動自在に収容された複列のボール５３、５３とを備えている。内方部材５１は、ハブ輪５４と、このハブ輪５４に所定のシメシロを介して圧入された内輪５５とからなる。   As an example of such a wheel bearing device with a rotational speed detection device, one having a structure as shown in FIG. 10 is known. This wheel bearing device with a rotational speed detection device includes an inner member 51, an outer member 52, and double-row balls 53, 53 accommodated between the members 51, 52 so as to roll freely. The inner member 51 includes a hub ring 54 and an inner ring 55 that is press-fitted into the hub ring 54 through a predetermined shimiro.

外方部材５２は、外周にナックル（図示せず）に取り付けるための車体取付フランジ５２ｂを一体に有し、内周に複列の外側転走面５２ａ、５２ａが一体に形成されている。ハブ輪５４は、アウター側の端部に車輪（図示せず）を取り付けるための車輪取付フランジ５６を一体に有し、外周に前記複列の外側転走面５２ａ、５２ａの一方に対向する内側転走面５４ａと、この内側転走面５４ａから軸方向に延びる小径段部５４ｂが形成されている。一方、内輪５５は外周に前記複列の外側転走面５２ａ、５２ａの他方に対向する内側転走面５５ａが形成され、ハブ輪５４の小径段部５４ｂに所定のシメシロを介して圧入されている。そして、ハブ輪５４の小径段部５４ｂの端部を径方向外方に塑性変形させて形成した加締部５７によって所定の軸受予圧が付与された状態で内輪５５が軸方向に固定されている。   The outer member 52 integrally has a vehicle body mounting flange 52b for mounting to a knuckle (not shown) on the outer periphery, and double row outer rolling surfaces 52a and 52a are integrally formed on the inner periphery. The hub wheel 54 integrally has a wheel mounting flange 56 for mounting a wheel (not shown) at an end portion on the outer side, and an inner side facing one of the double-row outer rolling surfaces 52a and 52a on the outer periphery. A rolling surface 54a and a small-diameter step portion 54b extending in the axial direction from the inner rolling surface 54a are formed. On the other hand, the inner ring 55 is formed with an inner rolling surface 55a facing the other of the double row outer rolling surfaces 52a, 52a on the outer periphery, and is press-fitted into the small-diameter step portion 54b of the hub ring 54 through a predetermined shimiro. Yes. And the inner ring | wheel 55 is fixed to the axial direction in the state to which the predetermined bearing preload was provided by the crimping part 57 formed by carrying out the plastic deformation of the edge part of the small diameter step part 54b of the hub ring 54 radially outward. .

外方部材５２の複列の外側転走面５２ａ、５２ａと、これらに対向する複列の内側転走面５４ａ、５５ａ間には複列のボール５３、５３がそれぞれ収容され、保持器５８、５８によって転動自在に保持されている。また、外方部材５２と内方部材５１との間に形成される環状空間の開口部のうち一方の開口部にはシール５９が装着され、他方の開口部には保護カバー６０が装着され、軸受内部に封入された潤滑グリースの漏洩と、外部から軸受内部に雨水やダスト等が侵入するのを防止している。   Between the double row outer raceway surfaces 52a, 52a of the outer member 52 and the double row inner raceway surfaces 54a, 55a facing these, double row balls 53, 53 are respectively accommodated, and a cage 58, It is held by 58 so that it can roll freely. In addition, a seal 59 is attached to one of the openings of the annular space formed between the outer member 52 and the inner member 51, and a protective cover 60 is attached to the other opening. This prevents leakage of lubricating grease sealed inside the bearing and intrusion of rainwater and dust into the bearing from the outside.

内輪５５には断面Ｌ字形に形成された支持環６１が外嵌されている。この支持環６１には、合成ゴムにフェライト等の磁性体粉が混入され、周方向に交互に等ピッチで磁極Ｎ、Ｓが着磁された磁気エンコーダ６２が加硫接着等によって一体に接合されている。   A support ring 61 having an L-shaped cross section is fitted on the inner ring 55. A magnetic encoder 62 in which magnetic powder such as ferrite is mixed with synthetic rubber and magnetic poles N and S are alternately magnetized at equal pitches in the circumferential direction is integrally joined to the support ring 61 by vulcanization bonding or the like. ing.

外方部材５２のインナー側の端部に装着された保護カバー６０は、非磁性体のオーステナイト系ステンレス鋼鈑からプレス加工によってカップ状に形成され、外方部材５２の端部内周に圧入される円筒状の嵌合部６０ａと、この嵌合部６０ａから径方向内方に延びる円板状の遮蔽部６０ｂと、この遮蔽部６０ｂから傾斜部６０ｃを介して内方部材５１の端部を塞ぐ底部６０ｄとを備えている。そして、この底部６０ｄの中心部には加締部５７の凹所５７ａに膨出する段付き部６０ｅが形成されている。また、図示しないセンサの検出部は、保護カバー６０の遮蔽部６０ｂに近接または当接され、検出部と磁気エンコーダ６２とは保護カバー６０を介して所定のエアギャップ（軸方向すきま）で対向配置されている。   The protective cover 60 attached to the inner side end of the outer member 52 is formed into a cup shape by pressing from a non-magnetic austenitic stainless steel plate and is press-fitted into the inner periphery of the end of the outer member 52. A cylindrical fitting portion 60a, a disc-shaped shielding portion 60b extending radially inward from the fitting portion 60a, and an end portion of the inner member 51 are closed from the shielding portion 60b via the inclined portion 60c. And a bottom portion 60d. A stepped portion 60e that bulges into the recess 57a of the caulking portion 57 is formed at the center of the bottom portion 60d. In addition, the detection unit of the sensor (not shown) is brought close to or in contact with the shielding unit 60b of the protective cover 60, and the detection unit and the magnetic encoder 62 are arranged to face each other with a predetermined air gap (axial clearance) through the protective cover 60. Has been.

このように、傾斜部６０ｃをはじめ段付き部６０ｅ等の段付き形状によって保護カバー６０の剛性が高くなり、飛石等の衝突による変形を抑えることができると共に、嵌合部６０ａが外方部材５２の段部に衝合するまで圧入されるので、外方部材５２に対する保護カバー６０の位置決め精度を高めることができ、正確なエアギャップ調整によって信頼性の高い速度検出を行なうことができる（例えば、特許文献１参照。）。   As described above, the stepped shape such as the stepped portion 60e including the inclined portion 60c increases the rigidity of the protective cover 60, can suppress deformation due to a collision of flying stones, and the fitting portion 60a is the outer member 52. Since it is press-fitted until it collides with the step portion, the positioning accuracy of the protective cover 60 with respect to the outer member 52 can be increased, and a reliable speed detection can be performed by accurate air gap adjustment (for example, (See Patent Document 1).

特開２０１０−１０６９０９号公報JP 2010-106909 A

このような従来の回転速度検出装置付き車輪用軸受装置において、回転速度センサが、磁気エンコーダ６２と非磁性体の保護カバー６０を介して所定のエアギャップ（軸方向すきま）で対向配置されているため、エアギャップに制限があって保護カバー６０の板厚が薄い物に規制される。したがって、保護カバー６０の嵌合部６０ａの環剛性が不足し、保護カバー６０の引抜き耐力が小さくなってしまう。この引抜き耐力が小さくなった場合、使用中に保護カバー６０が移動し、回転速度センサに強く接触して誤作動の原因にあると共に、保護カバー６０が脱落して密封性が維持できなくなってしまう恐れがあった。   In such a conventional wheel bearing device with a rotational speed detection device, the rotational speed sensor is disposed to face the magnetic encoder 62 and a nonmagnetic protective cover 60 with a predetermined air gap (axial clearance). Therefore, the air gap is limited, and the protective cover 60 is restricted to a thin plate. Therefore, the ring rigidity of the fitting portion 60a of the protective cover 60 is insufficient, and the pulling-out strength of the protective cover 60 is reduced. When this pulling-out strength is reduced, the protective cover 60 moves during use, causing strong contact with the rotation speed sensor and causing malfunctions, and the protective cover 60 falls off and the sealing performance cannot be maintained. There was a fear.

本発明は、このような従来の問題に鑑みてなされたもので、保護カバーの環剛性の向上を図り、引抜き耐力を高めた回転速度検出装置付き車輪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 view of such conventional problems, and an object of the present invention is to provide a wheel bearing device with a rotational speed detection device that improves the ring rigidity of the protective cover and has increased pulling strength. .

係る目的を達成すべく、本発明のうち請求項１に記載の発明は、外周にナックルに取り付けられるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪とからなり、外周に前記複列の外側転走面に対向する複列の内側転走面が形成された内方部材と、前記外方部材と内方部材のそれぞれの転走面間に転動自在に収容された複列の転動体と、前記内輪に外嵌され、円周方向に特性を交互に、かつ等間隔に変化させたパルサリングと、前記外方部材のインナー側の端部に嵌着され、非磁性体の鋼板からプレス加工により形成されたカップ状の保護カバーとを備え、この保護カバーを介して回転速度センサが前記パルサリングに所定の軸方向エアギャップで対峙されている回転速度検出装置付き車輪用軸受装置において、前記保護カバーが、前記外方部材のインナー側の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に延び、前記パルサリングに僅かな軸方向すきまを介して対峙する円板状の遮蔽部と、この遮蔽部から屈曲部を介して前記内方部材のインナー側の端部を覆う底部とを備えると共に、前記保護カバーの嵌合部が他の部位よりも剛性が高く設定されている。   In order to achieve such an object, the invention described in claim 1 of the present invention has a vehicle body mounting flange for being attached to a knuckle on the outer periphery, and a double row outer rolling surface on the inner periphery. A hub wheel integrally formed with a formed outer member and a wheel mounting flange for mounting a wheel at one end, and having a small-diameter step portion extending in the axial direction on the outer periphery, and a small-diameter step portion of the hub ring An inner member formed of at least one inner ring that is press-fitted, and formed with a double row inner rolling surface facing the double row outer rolling surface on the outer periphery, and each of the outer member and the inner member A double-row rolling element accommodated between the rolling surfaces, a pulsar ring that is externally fitted to the inner ring and whose characteristics are alternately changed at equal intervals in the circumferential direction, and the outer member It is fitted to the inner side end of the non-magnetic steel plate by pressing. In the wheel bearing device with a rotational speed detection device, the rotational speed sensor is opposed to the pulsar ring with a predetermined axial air gap through the protective cover. Is a cylindrical fitting portion that is press-fitted into the inner periphery of the inner side end of the outer member, and extends radially inward from the fitting portion, and confronts the pulsar ring via a slight axial clearance. A disc-shaped shielding portion and a bottom portion that covers the inner side end of the inner member from the shielding portion through a bent portion, and the fitting portion of the protective cover is more rigid than other portions. It is set high.

このように、内輪に外嵌され、円周方向に特性を交互に、かつ等間隔に変化させたパルサリングと、外方部材のインナー側の端部に嵌着され、非磁性体の鋼板からプレス加工により形成されたカップ状の保護カバーとを備え、この保護カバーを介して回転速度センサがパルサリングに所定の軸方向エアギャップで対峙されている回転速度検出装置付き車輪用軸受装置において、保護カバーが、外方部材のインナー側の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に延び、パルサリングに僅かな軸方向すきまを介して対峙する円板状の遮蔽部と、この遮蔽部から屈曲部を介して内方部材のインナー側の端部を覆う底部とを備えると共に、保護カバーの嵌合部が他の部位よりも剛性が高く設定されているので、保護カバーの環剛性の向上を図り、引抜き耐力を高めた回転速度検出装置付き車輪用軸受装置を提供することができる。   In this way, the palsar ring that is externally fitted to the inner ring, the characteristics are alternately changed at equal intervals in the circumferential direction, and the inner side end of the outer member is fitted and pressed from a non-magnetic steel plate. A protective cover for a wheel bearing device with a rotational speed detection device, wherein the rotational speed sensor is opposed to the pulsar ring with a predetermined axial air gap via the protective cover. Is a cylindrical fitting portion that is press-fitted into the inner periphery of the inner side end of the outer member, and a disc that extends radially inward from this fitting portion and faces the pulsar ring via a slight axial clearance. And a bottom portion that covers the inner side end of the inner member from the shielding portion through a bent portion, and the fitting portion of the protective cover is set to be higher in rigidity than other portions. Because the protective cover Aims to improve the ring stiffness, it is possible to provide a rotational speed detector equipped wheel support bearing assembly having improved pull strength.

好ましくは、請求項２に記載の発明のように、前記嵌合部の板厚が他の部位の板厚よりも肉厚に形成されていれば、保護カバーの環剛性の向上を確実に図ることができる。   Preferably, as in the invention described in claim 2, if the plate thickness of the fitting portion is formed thicker than the plate thickness of other portions, the ring rigidity of the protective cover is reliably improved. be able to.

また、請求項３に記載の発明のように、前記嵌合部の外周面に接着剤または液体パッキンが塗布されていれば、嵌合部の気密性を高めることができる。   Moreover, if the adhesive agent or liquid packing is apply | coated to the outer peripheral surface of the said fitting part like invention of Claim 3, the airtightness of a fitting part can be improved.

また、請求項４に記載の発明のように、前記嵌合部が前記外方部材の嵌合面に金属嵌合される円筒部と、この円筒部から軸方向に延びる縮径部で構成され、この縮径部の外周面に合成ゴムからなる弾性部材が加硫接着により一体に接合されていれば、外方部材との嵌合部の気密性が高くなり、密封性が向上する。   According to a fourth aspect of the present invention, the fitting portion includes a cylindrical portion that is metal-fitted to the fitting surface of the outer member, and a reduced diameter portion that extends in the axial direction from the cylindrical portion. If the elastic member made of synthetic rubber is integrally joined to the outer peripheral surface of the reduced diameter portion by vulcanization adhesion, the airtightness of the fitting portion with the outer member is increased, and the sealing performance is improved.

また、請求項５に記載の発明のように、前記嵌合部の円筒部が、その端部を内径側に折曲させて形成した重合部で構成されていれば、円筒部の板厚が実質的に他の部位の２倍の板厚とすることができ、嵌合部の環剛性を効果的に向上させることができる。   Moreover, if the cylindrical part of the said fitting part is comprised by the superposition | polymerization part formed by bending the edge part to an internal diameter side like invention of Claim 5, the plate | board thickness of a cylindrical part will be The plate thickness can be substantially double that of other parts, and the ring rigidity of the fitting portion can be effectively improved.

また、請求項６に記載の発明のように、前記嵌合部の円筒部が、その端部から径方向内方に延びる折曲部を備えていれば、嵌合部の環剛性を効果的に向上させることができる。   Moreover, if the cylindrical part of the said fitting part is equipped with the bending part extended radially inward from the edge part like invention of Claim 6, the ring rigidity of a fitting part is effective. Can be improved.

また、請求項７に記載の発明のように、前記嵌合部の円筒部が、その端部から径方向外方に突出した係止部を備え、前記外方部材の端部内周に形成された環状溝に係合されていれば、嵌合部の環剛性を向上させることができると共に、係止部によって保護カバーの引抜き耐力を格段に高めることができる。   According to a seventh aspect of the invention, the cylindrical portion of the fitting portion includes a locking portion that protrudes radially outward from the end portion, and is formed on the inner periphery of the end portion of the outer member. If it is engaged with the annular groove, the ring rigidity of the fitting portion can be improved, and the pull-out strength of the protective cover can be remarkably increased by the locking portion.

また、請求項８に記載の発明のように、前記係止部に面取り部が形成され、この面取り部の径が前記外方部材の内径端部に形成された面取り部の径よりも小径に設定されていれば、保護カバーを外方部材に圧入する際、嵌合部が弾性変形し易くなり、圧入の作業性を向上させることができる。   Further, as in the invention described in claim 8, a chamfered portion is formed in the locking portion, and the diameter of the chamfered portion is smaller than the diameter of the chamfered portion formed at the inner diameter end of the outer member. If set, when the protective cover is press-fitted into the outer member, the fitting portion is easily elastically deformed, and the press-fitting workability can be improved.

また、請求項９に記載の発明のように、前記嵌合部の開口端部に軸方向に延びるスリットが形成されていれば、嵌合部の環剛性が向上した分、圧入作業が低下するのを防止することができる。   Moreover, if the slit extended in an axial direction is formed in the opening edge part of the said fitting part like invention of Claim 9, the amount of press-fitting work will fall by the part which the ring rigidity of the fitting part improved. Can be prevented.

また、請求項１０に記載の発明のように、前記嵌合部の開口端部の内径が前記縮径部の外径よりも小径に設定されていれば、弾性部材の加硫前において、積層された保護カバー同士が嵌り込むのを防止することができ、製造時の作業性を向上させることができる。   Further, as in the invention according to claim 10, if the inner diameter of the opening end portion of the fitting portion is set to be smaller than the outer diameter of the reduced diameter portion, lamination is performed before vulcanization of the elastic member. It is possible to prevent the fitted protective covers from being fitted with each other, and to improve the workability at the time of manufacture.

また、請求項１１に記載の発明のように、前記保護カバーが嵌合される前記外方部材の嵌合面と、前記前記外方部材の内径端部に形成された面取り部が総型砥石によって同時に研削加工されていれば、寸法精度が向上すると共に、両者の同軸度が高くなり、保護カバーの圧入の作業性をさらに向上させることができる。   Further, as in the invention according to claim 11, a fitting surface of the outer member to which the protective cover is fitted and a chamfered portion formed at an inner diameter end portion of the outer member are a total type grindstone. If the grinding is simultaneously performed, the dimensional accuracy is improved and the coaxiality of both is increased, so that the workability of press-fitting the protective cover can be further improved.

本発明に係る回転速度検出装置付き車輪用軸受装置は、外周にナックルに取り付けられるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪とからなり、外周に前記複列の外側転走面に対向する複列の内側転走面が形成された内方部材と、前記外方部材と内方部材のそれぞれの転走面間に転動自在に収容された複列の転動体と、前記内輪に外嵌され、円周方向に特性を交互に、かつ等間隔に変化させたパルサリングと、前記外方部材のインナー側の端部に嵌着され、非磁性体の鋼板からプレス加工により形成されたカップ状の保護カバーとを備え、この保護カバーを介して回転速度センサが前記パルサリングに所定の軸方向エアギャップで対峙されている回転速度検出装置付き車輪用軸受装置において、前記保護カバーが、前記外方部材のインナー側の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に延び、前記パルサリングに僅かな軸方向すきまを介して対峙する円板状の遮蔽部と、この遮蔽部から屈曲部を介して前記内方部材のインナー側の端部を覆う底部とを備えると共に、前記保護カバーの嵌合部が他の部位よりも剛性が高く設定されているので、保護カバーの環剛性の向上を図り、引抜き耐力を高めた回転速度検出装置付き車輪用軸受装置を提供することができる。   The wheel bearing device with a rotational speed detection device according to the present invention has an outer body integrally provided with a vehicle body mounting flange for being attached to a knuckle on the outer periphery, and an outer side in which a double row outer rolling surface is integrally formed on the inner periphery. And a hub wheel integrally having a wheel mounting flange for mounting a wheel at one end thereof and having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one press-fitted into the small-diameter step portion of the hub ring An inner member comprising a plurality of inner rings, and an inner member formed with a double row inner rolling surface facing the outer surface of the double row on the outer periphery, and between the respective rolling surfaces of the outer member and the inner member. A double-row rolling element housed in a freely rotatable manner, a pulsar ring that is externally fitted to the inner ring and whose characteristics are alternately changed at equal intervals in the circumferential direction, and an inner end of the outer member And formed by pressing from a non-magnetic steel plate. In the wheel bearing device with a rotational speed detecting device, the rotational speed sensor is opposed to the pulsar ring with a predetermined axial air gap through the protective cover. A cylindrical fitting portion that is press-fitted into the inner circumference of the inner side end of the outer member, and a disc that extends radially inward from the fitting portion and faces the pulsar ring via a slight axial clearance. And a bottom part that covers the inner side end of the inner member from the shielding part through a bent part, and the fitting part of the protective cover is set to be higher in rigidity than other parts. Therefore, it is possible to provide a wheel bearing device with a rotational speed detection device that improves the ring rigidity of the protective cover and has an increased pulling strength.

本発明に係る回転速度検出装置付き車輪用軸受装置の一実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows one Embodiment of the wheel bearing apparatus with a rotational speed detection apparatus which concerns on this invention. 図１の検出部を示す要部拡大図である。It is a principal part enlarged view which shows the detection part of FIG. （ａ）は、本発明に係る保護カバーの積層状態を示す説明図、（ｂ）は、同上、保護カバーのゴム加硫後の積層状態を示す説明図である。(A) is explanatory drawing which shows the lamination | stacking state of the protective cover which concerns on this invention, (b) is explanatory drawing which shows the lamination | stacking state after rubber vulcanization of a protective cover same as the above. 図２の保護カバーの変形例を示す要部拡大図である。It is a principal part enlarged view which shows the modification of the protective cover of FIG. 図２の保護カバーの他の変形例を示す要部拡大図である。It is a principal part enlarged view which shows the other modification of the protective cover of FIG. 図５の保護カバーの変形例を示す要部拡大図である。It is a principal part enlarged view which shows the modification of the protective cover of FIG. 図６の保護カバーの変形例を示す要部拡大図である。It is a principal part enlarged view which shows the modification of the protective cover of FIG. 図７の保護カバーの変形例を示す要部拡大図である。It is a principal part enlarged view which shows the modification of the protective cover of FIG. 図８の保護カバーの変形例を示す要部拡大図である。It is a principal part enlarged view which shows the modification of the protective cover of FIG. 従来の回転速度検出装置付き車輪用軸受装置を示す縦断面図である。It is a longitudinal cross-sectional view which shows the conventional wheel bearing apparatus with a rotational speed detection apparatus.

外周にナックルに取り付けられるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に前記複列の外側転走面の一方に対向する内側転走面と、この内側転走面から軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入され、外周に前記複列の外側転走面の他方に対向する内側転走面が形成された内輪からなる内方部材と、この内方部材と前記外方部材のそれぞれの転走面間に転動自在に収容された複列の転動体と、前記内輪に外嵌され、円周方向に特性を交互に、かつ等間隔に変化させたパルサリングと、前記外方部材のインナー側の端部に嵌着され、非磁性体の鋼板からプレス加工により形成されたカップ状の保護カバーとを備え、この保護カバーを介して回転速度センサが前記パルサリングに所定の軸方向エアギャップで対峙されている回転速度検出装置付き車輪用軸受装置において、前記保護カバーが、前記外方部材のインナー側の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に延び、前記パルサリングに僅かな軸方向すきまを介して対峙する円板状の遮蔽部と、この遮蔽部から屈曲部を介して前記内方部材のインナー側の端部を覆う底部とを備えると共に、前記嵌合部が、前記外方部材のインナー側の端部内周に形成された嵌合面に金属嵌合され、板厚が他の部位の板厚よりも肉厚に形成された円筒部と、この円筒部から軸方向に延びる縮径部で構成され、この縮径部に合成ゴムからなる弾性部材が加硫接着によって一体に接合されている。   A vehicle body mounting flange to be attached to the knuckle on the outer periphery, an outer member in which a double row outer rolling surface is integrally formed on the inner periphery, and a wheel mounting flange to mount a wheel on one end A hub wheel integrally formed and having an inner rolling surface facing one of the outer rolling surfaces of the double row on the outer periphery, and a small-diameter step portion extending in the axial direction from the inner rolling surface, and the hub wheel An inner member formed of an inner ring that is press-fitted into a small-diameter step portion and has an inner rolling surface that is opposed to the other outer rolling surface of the double row on the outer periphery, and each of the inner member and the outer member. A double-row rolling element accommodated between the rolling surfaces, a pulsar ring that is externally fitted to the inner ring and whose characteristics are alternately changed at equal intervals in the circumferential direction, and the outer member Fitted to the inner side end of the steel and formed by pressing from a non-magnetic steel plate In the wheel bearing device with a rotational speed detection device, the rotational speed sensor is opposed to the pulsar ring with a predetermined axial air gap via the protective cover. A cylindrical fitting portion that is press-fitted into the inner periphery of the outer side end of the outer member, and a circle that extends radially inward from the fitting portion and faces the pulsar ring via a slight axial clearance. A plate-shaped shielding portion, and a bottom portion that covers the inner side end of the inner member from the shielding portion through a bent portion, and the fitting portion is located in the inner side end of the outer member. It is composed of a cylindrical portion that is metal-fitted to a fitting surface formed on the periphery, and whose plate thickness is formed thicker than the plate thickness of other parts, and a reduced diameter portion that extends in the axial direction from this cylindrical portion, An elastic member made of synthetic rubber is added to this reduced diameter part. They are joined together by adhesive.

以下、本発明の実施の形態を図面に基づいて詳細に説明する。
図１は、本発明に係る回転速度検出装置付き車輪用軸受装置の一実施形態を示す縦断面図、図２は、図１の検出部を示す要部拡大図、図３（ａ）は、本発明に係る保護カバーの積層状態を示す説明図、（ｂ）は、同上、保護カバーのゴム加硫後の積層状態を示す説明図、図４〜図９は、本発明に係る保護カバーの変形例を示す要部拡大図である。なお、以下の説明では、車両に組み付けた状態で車両の外側寄りとなる側をアウター側（図１の左側）、中央寄り側をインナー側（図１の右側）という。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a longitudinal sectional view showing an embodiment of a wheel bearing device with a rotational speed detection device according to the present invention, FIG. 2 is an enlarged view of a main part showing a detection unit of FIG. 1, and FIG. Explanatory drawing which shows the lamination | stacking state of the protective cover which concerns on this invention, (b) is the same as the above, explanatory drawing which shows the lamination | stacking state after rubber | gum vulcanization of a protective cover, FIGS. 4-9 is the protective cover which concerns on this invention It is a principal part enlarged view which shows a modification. In the following description, the side closer to the outer side of the vehicle when assembled to the vehicle is referred to as the outer side (left side in FIG. 1), and the side closer to the center is referred to as the inner side (right side in FIG. 1).

図１に示す回転速度検出装置付き車輪用軸受装置は従動輪側の第３世代と呼称され、内方部材１と外方部材２と、これら内方部材１と外方部材２との間に収容された複列の転動体（ボール）３、３とを備えている。内方部材１は、ハブ輪４と、このハブ輪４に固定された別体の内輪５とからなる。   The wheel bearing device with a rotational speed detection device shown in FIG. 1 is called the third generation on the driven wheel side, and is located between the inner member 1 and the outer member 2, and between the inner member 1 and the outer member 2. It has double row rolling elements (balls) 3 and 3 accommodated therein. The inner member 1 includes a hub ring 4 and a separate inner ring 5 fixed to the hub ring 4.

ハブ輪４は、アウター側の端部に車輪（図示せず）を取り付けるための車輪取付フランジ６を一体に有し、外周に一方（アウター側）の内側転走面４ａと、この内側転走面４ａから軸方向に延びる小径段部４ｂが形成されている。車輪取付フランジ６の円周等配位置には車輪を固定するためのハブボルト６ａが植設されている。   The hub wheel 4 integrally has a wheel mounting flange 6 for mounting a wheel (not shown) at an end portion on the outer side, and has one (outer side) inner rolling surface 4a on the outer periphery and the inner rolling surface. A small diameter step 4b extending in the axial direction from the surface 4a is formed. Hub bolts 6 a for fixing the wheels are planted at the circumferentially equidistant positions of the wheel mounting flanges 6.

内輪５は、外周に他方（インナー側）の内側転走面５ａが形成され、ハブ輪４の小径段部４ｂに所定のシメシロを介して圧入されている。そして、小径段部４ｂの端部を径方向外方に塑性変形させて形成した加締部７によって所定の軸受予圧が付与された状態で軸方向に固定されている。   The inner ring 5 is formed with the other (inner side) inner raceway surface 5a on the outer periphery, and is press-fitted into the small-diameter step portion 4b of the hub ring 4 via a predetermined squeeze. And it fixes to the axial direction in the state to which the predetermined bearing preload was provided by the crimping part 7 formed by carrying out the plastic deformation of the edge part of the small diameter step part 4b to radial direction outward.

ハブ輪４はＳ５３Ｃ等の炭素０．４０〜０．８０ｗｔ％を含む中高炭素鋼で形成され、内側転走面４ａをはじめ、後述するシール９のシールランド部となる車輪取付フランジ６のインナー側の基部６ｂから小径段部４ｂに亙って高周波焼入れによって表面硬さを５８〜６４ＨＲＣの範囲に硬化処理されている。なお、加締部７は、鍛造後の素材表面硬さ２５ＨＲＣ以下の未焼入れ部としている。また、内輪５および転動体３はＳＵＪ２等の高炭素クロム軸受鋼からなり、ズブ焼入れにより芯部まで５８〜６４ＨＲＣの範囲で硬化処理されている。   The hub wheel 4 is made of medium and high carbon steel containing carbon of 0.40 to 0.80 wt% such as S53C, and includes an inner rolling surface 4a and an inner side of a wheel mounting flange 6 that becomes a seal land portion of a seal 9 to be described later. The surface hardness is hardened to a range of 58 to 64 HRC by induction hardening from the base 6b to the small diameter step 4b. Note that the caulking portion 7 is an unquenched portion having a material surface hardness of 25 HRC or less after forging. Further, the inner ring 5 and the rolling element 3 are made of high carbon chrome bearing steel such as SUJ2, and are hardened in the range of 58 to 64 HRC to the core part by quenching.

一方、外方部材２は、外周に懸架装置を構成するナックル（図示せず）に取り付けられるための車体取付フランジ２ｂを一体に有し、内周に内方部材１の複列の内側転走面４ａ、５ａに対向する複列の外側転走面２ａ、２ａが一体に形成されている。この外方部材２は、ハブ輪４と同様、Ｓ５３Ｃ等の炭素０．４０〜０．８０ｗｔ％を含む中高炭素鋼で形成され、少なくとも複列の外側転走面２ａ、２ａが高周波焼入れによって表面硬さを５８〜６４ＨＲＣの範囲に硬化処理されている。そして、これら両転走面２ａ、４ａおよび２ａ、５ａ間に保持器８を介して複列の転動体３、３が転動自在に収容されている。   On the other hand, the outer member 2 integrally has a vehicle body mounting flange 2b to be attached to a knuckle (not shown) constituting a suspension device on the outer periphery, and double row inner rolling of the inner member 1 on the inner periphery. Double-row outer rolling surfaces 2a and 2a facing the surfaces 4a and 5a are integrally formed. This outer member 2 is formed of medium and high carbon steel containing carbon of 0.40 to 0.80 wt% such as S53C, as in the case of the hub wheel 4, and at least the double row outer raceway surfaces 2 a and 2 a are surfaced by induction hardening. Hardening is performed in the range of 58 to 64 HRC. And the double row rolling elements 3 and 3 are accommodated so that rolling is possible via the holder | retainer 8 between these both rolling surfaces 2a, 4a and 2a, 5a.

外方部材２と内方部材１間に形成される環状空間の開口部のうちアウター側の開口部にはシール９が装着され、インナー側の開口部には保護カバー１０が装着され、軸受内部に封入された潤滑グリースの外部への漏洩と、外部から雨水やダスト等が軸受内部に侵入するのを防止している。   Among the openings of the annular space formed between the outer member 2 and the inner member 1, a seal 9 is attached to the opening on the outer side, and a protective cover 10 is attached to the opening on the inner side. Leakage of the lubricating grease enclosed in the outside and rain water and dust from the outside are prevented from entering the inside of the bearing.

なお、ここでは、車輪用軸受装置として、転動体３をボールとした複列アンギュラ玉軸受で構成されたものを例示したが、これに限らず転動体に円錐ころを使用した複列円錐ころ軸受で構成されたものであっても良い。また、第３世代の構造を例示したが、一対の内輪をハブ輪に圧入した、所謂第２世代の構造であっても良い。   In addition, although what was comprised here as the wheel bearing apparatus was comprised by the double row angular contact ball bearing which used the rolling element 3 as a ball | bowl, it is not restricted to this, The double row tapered roller bearing which used the tapered roller for the rolling element It may be configured by. Further, the third generation structure is illustrated, but a so-called second generation structure in which a pair of inner rings are press-fitted into the hub ring may be used.

アウター側のシール９は、外方部材２のアウター側端部の内周に所定のシメシロを介して圧入された芯金１１と、この芯金１１に加硫接着によって一体に接合されたシール部材１２とからなる一体型のシールで構成されている。芯金１１は、オーステナイト系ステンレス鋼板（ＪＩＳ規格のＳＵＳ３０４系等）や冷間圧延鋼板（ＪＩＳ規格のＳＰＣＣ系等）からプレス加工にて断面略Ｌ字状に形成されている。   The outer-side seal 9 includes a core 11 that is press-fitted into the inner circumference of the outer-side end portion of the outer member 2 via a predetermined shimiro, and a seal member that is integrally joined to the core 11 by vulcanization adhesion It is comprised by the integral seal | sticker which consists of 12. The metal core 11 is formed from an austenitic stainless steel plate (JIS standard SUS304 type or the like) or a cold rolled steel plate (JIS standard SPCC type or the like) in a substantially L-shaped cross section by press working.

一方、シール部材１２はＮＢＲ（アクリロニトリル−ブタジエンゴム）等の合成ゴムからなり、径方向外方に傾斜して形成され、断面が円弧状に形成された基部６ｂに所定の軸方向シメシロをもって摺接するサイドリップ１２ａとダストリップ１２ｂ、および軸受内方側に傾斜して形成され、基部６ｂに所定の径方向シメシロを介して摺接するグリースリップ１２ｃとを有している。   On the other hand, the seal member 12 is made of a synthetic rubber such as NBR (acrylonitrile-butadiene rubber), is formed to be inclined outward in the radial direction, and is slidably contacted with a base portion 6b having a circular section in a predetermined axial direction. The side lip 12a and the dust lip 12b, and the grease lip 12c formed so as to be inclined toward the inner side of the bearing and slidably contacted with the base portion 6b via a predetermined radial shimoshiro.

なお、シール部材１２の材質としては、ＮＢＲ以外にも、例えば、耐熱性に優れたＨＮＢＲ（水素化アクリロニトリル・ブタジエンゴム）、ＥＰＤＭ（エチレンプロピレンゴム）等をはじめ、耐熱性、耐薬品性に優れたＡＣＭ（ポリアクリルゴム）、ＦＫＭ（フッ素ゴム）、あるいはシリコンゴム等を例示することができる。   In addition to NBR, the material of the seal member 12 is excellent in heat resistance and chemical resistance, such as HNBR (hydrogenated acrylonitrile butadiene rubber), EPDM (ethylene propylene rubber), etc., which have excellent heat resistance. Examples thereof include ACM (polyacrylic rubber), FKM (fluororubber), and silicon rubber.

ここで、内輪５の外径にパルサリング１３が圧入されている。このパルサリング１３は、強磁性体の鋼板、例えば、フェライト系のステンレス鋼板（ＪＩＳ規格のＳＵＳ４３０系等）や防錆処理された冷間圧延鋼板からプレス加工によってＬ字状に、全体として円環状に形成された支持環１４と、この支持環１４に一体に接合された磁気エンコーダ１５とからなる。   Here, a pulsar ring 13 is press-fitted into the outer diameter of the inner ring 5. This pulsar ring 13 is formed into an L shape by pressing from a ferromagnetic steel plate, for example, a ferritic stainless steel plate (JIS standard SUS430 series or the like) or a rust-proof cold rolled steel plate, and is formed into an annular shape as a whole. The support ring 14 is formed, and a magnetic encoder 15 is integrally joined to the support ring 14.

支持環１４は、図２に拡大して示すように、内輪５の外径に圧入される円筒状の嵌合部１４ａと、この嵌合部１４ａから径方向内方に延びる立板部１４ｂとを備えている。そして、この立板部１４ｂに磁気エンコーダ１５が加硫接着によって一体に接合されている。この磁気エンコーダ１５は、ゴム等のエラストマにフェライト等の磁性体粉が混入され、周方向に交互に磁極Ｎ、Ｓが着磁されて車輪の回転速度検出用のロータリエンコーダを構成している。   As shown in an enlarged view in FIG. 2, the support ring 14 includes a cylindrical fitting portion 14a that is press-fitted into the outer diameter of the inner ring 5, and a standing plate portion 14b that extends radially inward from the fitting portion 14a. It has. The magnetic encoder 15 is integrally joined to the standing plate portion 14b by vulcanization adhesion. This magnetic encoder 15 constitutes a rotary encoder for detecting the rotational speed of a wheel by mixing magnetic powder such as ferrite in an elastomer such as rubber and magnetizing magnetic poles N and S alternately in the circumferential direction.

なお、ここでは、ゴム磁石からなる磁気エンコーダ１５を有するパルサリング１３を例示したが、これに限らず、円周方向に交互に、かつ等間隔に特性が変化する構成であれば良く、複数の透孔や凹凸が形成された鋼板製のパルサリングであっても良いし、焼結合金で形成されたものでも良い。また、プラスチック磁石が接合されたものでも良い。   Although the pulsar ring 13 having the magnetic encoder 15 made of a rubber magnet is illustrated here, the present invention is not limited to this, and any configuration may be used as long as the characteristics change alternately in the circumferential direction and at equal intervals. It may be a pulsar ring made of steel plate in which holes and irregularities are formed, or may be formed of a sintered alloy. Further, a plastic magnet may be joined.

本実施形態では、外方部材２のインナー側の端部内周に保護カバー１０が圧入され、外方部材２のインナー側の開口部を閉塞している。この保護カバー１０は、後述する回転速度センサ１６の感知性能に悪影響を及ぼさないように、耐食性を有する非磁性体の鋼板、例えば、オーステナイト系ステンレス鋼板が使用されている。   In the present embodiment, the protective cover 10 is press-fitted into the inner periphery of the inner side end of the outer member 2 to close the inner opening of the outer member 2. The protective cover 10 is made of a non-magnetic steel plate having corrosion resistance, for example, an austenitic stainless steel plate so as not to adversely affect the sensing performance of the rotational speed sensor 16 described later.

保護カバー１０は、外方部材２の端部内周に圧入される円筒状の嵌合部１０ａと、この嵌合部１０ａから径方向内方に延び、磁気エンコーダ１５に僅かな軸方向すきまを介して対峙する円板状の遮蔽部１０ｂと、この遮蔽部１０ｂから屈曲部１０ｃを介して内方部材１のインナー側の端部を覆う底部１０ｄとを備えている（図１参照）。   The protective cover 10 is a cylindrical fitting portion 10a that is press-fitted into the inner periphery of the end portion of the outer member 2, and extends radially inward from the fitting portion 10a. The magnetic encoder 15 is provided with a slight axial clearance. And a bottom 10d that covers the inner end of the inner member 1 from the shield 10b through the bent portion 10c (see FIG. 1).

回転速度センサ１６の検出部は、保護カバー１０の遮蔽部１０ｂに近接または当接され、検出部と磁気エンコーダ１５とは保護カバー１０を介して所定のエアギャップ（軸方向すきま）で対向配置されている。回転速度センサ１６はＰＡ６６等の射出成形可能な合成樹脂で形成され、ホール素子、磁気抵抗素子（ＭＲ素子）等、磁束の流れ方向に応じて特性を変化させる磁気検出素子およびこの磁気検出素子の出力波形を整える波形整形回路が組み込まれたＩＣ（図示せず）等が包埋され、車輪の回転速度を検出してその回転数を制御する自動車のＡＢＳを構成している。   The detection part of the rotation speed sensor 16 is brought close to or in contact with the shielding part 10b of the protective cover 10, and the detection part and the magnetic encoder 15 are arranged to face each other with a predetermined air gap (axial clearance) through the protective cover 10. ing. The rotational speed sensor 16 is made of injection-moldable synthetic resin such as PA66, and has a magnetic detecting element such as a Hall element, a magnetoresistive element (MR element), etc., whose characteristics change according to the flow direction of magnetic flux, and the magnetic detecting element. An IC (not shown) or the like in which a waveform shaping circuit for adjusting an output waveform is embedded is embedded, and constitutes an automobile ABS that detects the rotational speed of a wheel and controls its rotational speed.

本実施形態では、保護カバー１０の嵌合部１０ａが、外方部材２のインナー側の端部内周に形成された嵌合面２ｃに金属嵌合される円筒部１７と、この円筒部１７から軸方向に延びる縮径部１８で構成されている。そして、縮径部１８にＮＢＲ等の合成ゴムからなる弾性部材１９が加硫接着によって一体に接合されている。この弾性部材１９は、保護カバー１０の遮蔽部１０ｂの側面からインナー側に突出して回転速度センサ１６に干渉しないように接合され、円筒部１７の外径より径方向外方に突出する環状突起１９ａを備えている。この環状突起１９ａが保護カバー１０の嵌合時に外方部材２の端部内周に弾性変形して圧着され、嵌合部１０ａの気密性を高めている。   In the present embodiment, the fitting portion 10 a of the protective cover 10 is metal-fitted to a fitting surface 2 c formed on the inner periphery of the inner side end of the outer member 2. It is comprised by the diameter reducing part 18 extended in an axial direction. An elastic member 19 made of synthetic rubber such as NBR is integrally joined to the reduced diameter portion 18 by vulcanization adhesion. The elastic member 19 is joined so as not to interfere with the rotational speed sensor 16 from the side surface of the shielding portion 10 b of the protective cover 10 and is joined so as not to interfere with the rotational speed sensor 16, and an annular projection 19 a that projects radially outward from the outer diameter of the cylindrical portion 17. It has. The annular protrusion 19a is elastically deformed and crimped to the inner periphery of the end of the outer member 2 when the protective cover 10 is fitted, thereby improving the airtightness of the fitting part 10a.

ここで、嵌合部１０ａの円筒部１７の板厚ｔ１は、他の部位の板厚ｔ０よりも厚く（ｔ１＞ｔ０）形成されている。これにより、保護カバー１０における嵌合部１０ａの環剛性の向上を図り、引抜き耐力を高めた回転速度検出装置付き車輪用軸受装置を提供することができる。   Here, the plate thickness t1 of the cylindrical portion 17 of the fitting portion 10a is formed to be thicker (t1> t0) than the plate thickness t0 of other portions. Thereby, the improvement of the ring rigidity of the fitting part 10a in the protective cover 10 can be aimed at, and the wheel bearing apparatus with a rotational speed detection apparatus which improved the pulling-out yield strength can be provided.

こうした保護カバー１０は、製造工程において、図３（ａ）に示すように、通常、設置スペースを取らないように積層された状態で保管あるいは工程待ちされるが、弾性部材１９の加硫前において、積層された保護カバー１０’同士が嵌り込むのを防止するために、嵌合部１０ａにおける円筒部１７の内径ｄ１は、縮径部１８の外径ｄ２よりも小径（ｄ１＜ｄ２）になるように設定されている。これにより、弾性部材１９の加硫前だけでなく、（ｂ）に示すように、弾性部材１９の加硫後においても、積層された保護カバー１０の製造工程での作業性を一層向上させることができる。   As shown in FIG. 3A, such a protective cover 10 is usually stored in a stacked state so as not to take up installation space or waits for the process, but before the elastic member 19 is vulcanized. In order to prevent the stacked protective covers 10 ′ from being fitted to each other, the inner diameter d 1 of the cylindrical portion 17 in the fitting portion 10 a is smaller than the outer diameter d 2 of the reduced diameter portion 18 (d 1 <d 2). Is set to As a result, not only before the elastic member 19 is vulcanized but also after the elastic member 19 is vulcanized, the workability in the manufacturing process of the laminated protective cover 10 is further improved. Can do.

図４に、図２の保護カバー１０の変形例を示す。この実施形態は、前述したものと基本的には保護カバーの嵌合部の構成が一部異なるだけで、その他同一部品同一部位あるいは同様の機能を有する部品や部位には同じ符合を付して詳細な説明を省略する。   FIG. 4 shows a modification of the protective cover 10 of FIG. In this embodiment, basically, the configuration of the fitting portion of the protective cover is only partially different from that described above, and the same reference numerals are given to other parts and parts having the same function or the same function. Detailed description is omitted.

外方部材２に保護カバー２０が装着され、外方部材２のインナー側の開口部を閉塞している。この保護カバー２０は、非磁性体のオーステナイト系ステンレス鋼板をプレス成形してカップ状に形成されている。保護カバー２０は、外方部材２の端部内周に圧入される円筒状の嵌合部２０ａと、この嵌合部２０ａから径方向内方に延び、磁気エンコーダ１５に僅かな軸方向すきまを介して対峙する円板状の遮蔽部１０ｂを備えている。   A protective cover 20 is attached to the outer member 2 to close the inner side opening of the outer member 2. The protective cover 20 is formed in a cup shape by press-molding a non-magnetic austenitic stainless steel plate. The protective cover 20 is a cylindrical fitting portion 20a that is press-fitted into the inner periphery of the end portion of the outer member 2, and extends radially inward from the fitting portion 20a, and the magnetic encoder 15 is provided with a slight axial clearance. The disk-shaped shielding part 10b which opposes is provided.

本実施形態では、保護カバー２０の嵌合部２０ａに前述した弾性部材が接合されておらず、その代わり、嵌合部２０ａにおける外方部材２のインナー側の端面２ｄ側に、少なくとも嵌合部２０ａの幅１／３の範囲に接着剤あるいは液体パッキン等が介在されている。これにより、嵌合部２０ａの気密性を高めることができると共に、前述した実施形態よりも嵌合部２０ａの環剛性を向上させることができる。なお、接着剤としては、エポキシ樹脂系をはじめフェノール樹脂系、あるいは、ポリウレタン系やポリエチレン系等を例示することができる。   In this embodiment, the elastic member mentioned above is not joined to the fitting part 20a of the protective cover 20, and instead, at least the fitting part is provided on the inner end face 2d side of the outer member 2 in the fitting part 20a. An adhesive or liquid packing is interposed in the range of the width 1/3 of 20a. Thereby, while being able to improve the airtightness of the fitting part 20a, the ring rigidity of the fitting part 20a can be improved rather than embodiment mentioned above. Examples of the adhesive include epoxy resin, phenol resin, polyurethane, and polyethylene.

図５に示す保護カバー２１は、非磁性体のオーステナイト系ステンレス鋼板をプレス成形してカップ状に形成され、外方部材２の端部内周に圧入される円筒状の嵌合部２１ａと、この嵌合部２１ａから径方向内方に延び、磁気エンコーダ１５に僅かな軸方向すきまを介して対峙する円板状の遮蔽部１０ｂを備えている。   The protective cover 21 shown in FIG. 5 is formed into a cup shape by press-molding a non-magnetic austenitic stainless steel plate, and a cylindrical fitting portion 21a that is press-fitted into the inner periphery of the end portion of the outer member 2. A disc-shaped shielding portion 10b that extends radially inward from the fitting portion 21a and faces the magnetic encoder 15 via a slight axial clearance is provided.

本実施形態では、保護カバー２１の嵌合部２１ａが、外方部材２の嵌合面２ｃに金属嵌合される円筒状の重合部２２と、この重合部２２から軸方向に延びる縮径部１８で構成されている。重合部２２は、保護カバー２１の端部を内径側に折曲させることにより実質的に２倍の板厚とすることができ、嵌合部２１ａの環剛性を効果的に向上させることができる。   In the present embodiment, the fitting portion 21 a of the protective cover 21 has a cylindrical overlapping portion 22 that is metal-fitted to the fitting surface 2 c of the outer member 2, and a reduced diameter portion that extends from the overlapping portion 22 in the axial direction. 18. The overlapping portion 22 can be substantially doubled in thickness by bending the end portion of the protective cover 21 to the inner diameter side, and can effectively improve the ring rigidity of the fitting portion 21a. .

図６に示す保護カバー２３は、非磁性体のオーステナイト系ステンレス鋼板をプレス成形してカップ状に形成され、外方部材２の端部内周に圧入される円筒状の嵌合部２３ａと、この嵌合部２３ａから径方向内方に延び、磁気エンコーダ１５に僅かな軸方向すきまを介して対峙する円板状の遮蔽部１０ｂを備えている。   The protective cover 23 shown in FIG. 6 is formed by pressing a non-magnetic austenitic stainless steel plate into a cup shape, and a cylindrical fitting portion 23a that is press-fitted into the inner periphery of the end portion of the outer member 2. A disc-shaped shielding portion 10b is provided that extends radially inward from the fitting portion 23a and faces the magnetic encoder 15 via a slight axial clearance.

本実施形態では、保護カバー２３の嵌合部２３ａが、外方部材２の嵌合面２ｃに金属嵌合される円筒部２４ａと、この円筒部２４ａから軸方向に延びる縮径部１８と、円筒部２４ａの端部から径方向内方に延びる折曲部２４ｂで構成されている。この折曲部２４ｂによって嵌合部２３ａの環剛性を効果的に向上させることができる。   In the present embodiment, the fitting portion 23a of the protective cover 23 has a cylindrical portion 24a that is metal-fitted to the fitting surface 2c of the outer member 2, a reduced diameter portion 18 that extends from the cylindrical portion 24a in the axial direction, It is comprised by the bending part 24b extended in a radial direction inward from the edge part of the cylindrical part 24a. The ring portion 24b can effectively improve the ring rigidity of the fitting portion 23a.

図７に示す保護カバー２５は、非磁性体のオーステナイト系ステンレス鋼板をプレス成形してカップ状に形成され、外方部材２’の端部内周に圧入される円筒状の嵌合部２５ａと、この嵌合部２５ａから径方向内方に延び、磁気エンコーダ１５に僅かな軸方向すきまを介して対峙する円板状の遮蔽部１０ｂを備えている。   The protective cover 25 shown in FIG. 7 is formed into a cup shape by press-molding a non-magnetic austenitic stainless steel plate, and a cylindrical fitting portion 25a that is press-fitted into the inner periphery of the end portion of the outer member 2 ′. A disk-shaped shielding portion 10b that extends radially inward from the fitting portion 25a and faces the magnetic encoder 15 via a slight axial clearance is provided.

本実施形態では、保護カバー２５の嵌合部２５ａが、外方部材２’の嵌合面２ｃに金属嵌合される円筒部２６ａと、この円筒部２６ａから軸方向に延びる縮径部１８と、円筒部２６ａの端部から径方向外方に突出した係止部２６ｂで構成されている。円筒部２６ａの板厚ｔ１は、他の部位の板厚ｔ０よりも肉厚に形成されていると共に、係止部２６ｂが外方部材２’の端部内周に形成された環状溝２７に係合する。これにより、嵌合部２５ａの環剛性を向上させることができると共に、係止部２６ｂによって保護カバー２５の引抜き耐力を格段に高めることができる。   In the present embodiment, the fitting portion 25a of the protective cover 25 includes a cylindrical portion 26a that is metal-fitted to the fitting surface 2c of the outer member 2 ′, and a reduced diameter portion 18 that extends from the cylindrical portion 26a in the axial direction. The locking portion 26b protrudes radially outward from the end of the cylindrical portion 26a. The thickness t1 of the cylindrical portion 26a is formed to be thicker than the thickness t0 of other portions, and the locking portion 26b is related to the annular groove 27 formed on the inner periphery of the end of the outer member 2 ′. Match. Thereby, while being able to improve the ring rigidity of the fitting part 25a, the pulling-out yield strength of the protective cover 25 can be raised significantly by the latching part 26b.

なお、保護カバー２５の嵌合部２５ａを弾性変形させて外方部材２’に圧入する訳であるが、この場合、嵌合部２５ａの環剛性が向上した分、圧入作業が低下しないように、図示はしないが、嵌合部２５ａの円筒部２６ａから係止部２６ｂに亙って、軸方向に延びるスリットを形成すると良い。このスリットは、嵌合部２５ａの環剛性に対応して複数形成しても良い。   In addition, although the fitting part 25a of the protective cover 25 is elastically deformed and press-fitted into the outer member 2 ', in this case, the press-fitting operation is not lowered by the amount that the ring rigidity of the fitting part 25a is improved. Although not shown, a slit extending in the axial direction may be formed from the cylindrical portion 26a of the fitting portion 25a to the locking portion 26b. A plurality of slits may be formed corresponding to the ring rigidity of the fitting portion 25a.

図８に示す保護カバー２８は、非磁性体のオーステナイト系ステンレス鋼板をプレス成形してカップ状に形成され、外方部材２の端部内周に圧入される円筒状の嵌合部２８ａと、この嵌合部２８ａから径方向内方に延び、磁気エンコーダ１５に僅かな軸方向すきまを介して対峙する円板状の遮蔽部１０ｂを備えている。   The protective cover 28 shown in FIG. 8 is formed into a cup shape by press-molding a non-magnetic austenitic stainless steel plate, and a cylindrical fitting portion 28a that is press-fitted into the inner periphery of the end portion of the outer member 2. A disc-shaped shielding portion 10b that extends radially inward from the fitting portion 28a and faces the magnetic encoder 15 via a slight axial clearance is provided.

本実施形態では、保護カバー２８の嵌合部２８ａが、外方部材２’の嵌合面２ｃに金属嵌合される円筒部１７と、この円筒部１７から軸方向に延びる縮径部１８を備え、円筒部１７の端部から径方向外方に突出した係止部１７ａが形成されている。係止部１７ａが外方部材２’の端部内周に形成された環状溝２７’に係合することにより、嵌合部２８ａの環剛性を向上させることができると共に、保護カバー２８の引抜き耐力を格段に高めることができる。   In the present embodiment, the fitting portion 28 a of the protective cover 28 includes a cylindrical portion 17 that is metal-fitted to the fitting surface 2 c of the outer member 2 ′, and a reduced diameter portion 18 that extends in the axial direction from the cylindrical portion 17. And a locking portion 17a that protrudes radially outward from the end of the cylindrical portion 17 is formed. The engaging portion 17a engages with the annular groove 27 'formed on the inner periphery of the end of the outer member 2', so that the ring rigidity of the fitting portion 28a can be improved and the pulling strength of the protective cover 28 is increased. Can be significantly increased.

図９に示す保護カバー２９は、非磁性体のオーステナイト系ステンレス鋼板をプレス成形してカップ状に形成され、外方部材２’の端部内周に圧入される円筒状の嵌合部２９ａと、この嵌合部２９ａから径方向内方に延び、磁気エンコーダ１５に僅かな軸方向すきまを介して対峙する円板状の遮蔽部１０ｂを備えている。   The protective cover 29 shown in FIG. 9 is formed into a cup shape by press-molding a non-magnetic austenitic stainless steel plate, and a cylindrical fitting portion 29a that is press-fitted into the inner periphery of the end of the outer member 2 ′. A disk-shaped shielding portion 10b that extends radially inward from the fitting portion 29a and faces the magnetic encoder 15 through a slight axial clearance is provided.

本実施形態では、保護カバー２９の嵌合部２９ａが、外方部材２’の嵌合面２ｃに金属嵌合される円筒部１７と、この円筒部１７から軸方向に延びる縮径部１８を備え、円筒部１７の端部から径方向外方に突出した係止部１７ｂが形成され、この係止部１７ｂに面取り部３０が形成されている。   In the present embodiment, the fitting portion 29a of the protective cover 29 includes a cylindrical portion 17 that is metal-fitted to the fitting surface 2c of the outer member 2 ′, and a reduced diameter portion 18 that extends from the cylindrical portion 17 in the axial direction. And a locking portion 17b protruding radially outward from the end of the cylindrical portion 17 is formed, and a chamfered portion 30 is formed on the locking portion 17b.

ここで、保護カバー２９の係止部１７ｂの面取り径ｄ３が、外方部材２’の内径端部に形成された面取り部３１の内径ｄ４よりも小径（ｄ３＜ｄ４）に設定されている。これにより、保護カバー２９を外方部材２’に圧入する際、嵌合部２９ａが弾性変形し易くなり、圧入の作業性を向上させることができる。   Here, the chamfered diameter d3 of the locking portion 17b of the protective cover 29 is set to a smaller diameter (d3 <d4) than the inner diameter d4 of the chamfered portion 31 formed at the inner diameter end of the outer member 2 '. Accordingly, when the protective cover 29 is press-fitted into the outer member 2 ′, the fitting portion 29 a is easily elastically deformed, and the press-fitting workability can be improved.

なお、外方部材２’の嵌合面２ｃと面取り部３１を総型砥石によって同時に研削加工することにより、寸法精度が向上すると共に、両者の同軸度が高くなり、保護カバー２９の圧入の作業性をさらに向上させることができる。   In addition, by simultaneously grinding the fitting surface 2c and the chamfered portion 31 of the outer member 2 'with a general-purpose grindstone, the dimensional accuracy is improved and the coaxiality of both is increased, and the press-fitting operation of the protective cover 29 is performed. The property can be further improved.

以上、本発明の実施の形態について説明を行ったが、本発明はこうした実施の形態に何等限定されるものではなく、あくまで例示であって、本発明の要旨を逸脱しない範囲内において、さらに種々なる形態で実施し得ることは勿論のことであり、本発明の範囲は、特許請求の範囲の記載によって示され、さらに特許請求の範囲に記載の均等の意味、および範囲内のすべての変更を含む。   The embodiment of the present invention has been described above, but the present invention is not limited to such an embodiment, and is merely an example, and various modifications can be made without departing from the scope of the present invention. Of course, the scope of the present invention is indicated by the description of the scope of claims, and further, the equivalent meanings described in the scope of claims and all modifications within the scope of the scope of the present invention are included. Including.

本発明に係る回転速度検出装置付き車輪用軸受装置は、従動輪用、あるいは転動体がボール、円錐ころ等、あらゆる構造の内輪回転タイプの車輪用軸受装置に適用することができる。   The wheel bearing device with a rotational speed detection device according to the present invention can be applied to a wheel bearing device for a driven wheel, or an inner ring rotating type wheel having any structure such as a ball or a tapered roller.

１ 内方部材
２、２’ 外方部材
２ａ 外側転走面
２ｂ 車体取付フランジ
２ｃ 外方部材の嵌合面
２ｄ 外方部材の端面
３ 転動体
４ ハブ輪
４ａ、５ａ 内側転走面
５ 内輪
６ 車輪取付フランジ
６ａ ハブボルト
６ｂ 車輪取付フランジのインナー側の基部
７ 加締部
８ 保持器
９ シール
１０、１０’、２０、２１、２３、２５、２８、２９ 保護カバー
１０ａ、１４ａ、２０ａ、２１ａ、２３ａ、２５ａ、２８ａ、２９ａ 嵌合部
１０ｂ 遮蔽部
１０ｃ 屈曲部
１０ｄ 底部
１１ 芯金
１２ シール部材
１２ａ サイドリップ
１２ｂ ダストリップ
１２ｃ グリースリップ
１３ パルサリング
１４ 支持環
１４ｂ 立板部
１５ 磁気エンコーダ
１６ 回転速度センサ
１７、２４ａ、２６ａ 円筒部
１７ａ、１７ｂ、２６ｂ 係止部
１８ 縮径部
１９ 弾性部材
１９ａ 環状突起
２２ 重合部
２４ｂ 折曲部
２７、２７’ 環状溝
３０、３１ 面取り部
５１ 内方部材
５２ 外方部材
５２ａ 外側転走面
５２ｂ 車体取付フランジ
５３ ボール
５４ ハブ輪
５４ａ、５５ａ 内側転走面
５４ｂ 小径段部
５５ 内輪
５６ 車輪取付フランジ
５７ 加締部
５７ａ 凹所
５８ 保持器
５９ シール
６０ 保護カバー
６０ａ 嵌合部
６０ｂ 遮蔽部
６０ｃ 傾斜部
６０ｄ 底部
６０ｅ 段付き部
６１ 支持環
６２ 磁気エンコーダ
ｄ１ 保護カバーの嵌合部の内径
ｄ２ 保護カバーの縮径部の外径
ｄ３ 保護カバーの面取り径
ｄ４ 外方部材の面取り部の内径
ｔ０ 保護カバーの嵌合部以外の板厚
ｔ１ 保護カバーの嵌合部の板厚 DESCRIPTION OF SYMBOLS 1 Inner member 2, 2 'Outer member 2a Outer rolling surface 2b Car body mounting flange 2c Outer member fitting surface 2d Outer member end surface 3 Rolling element 4 Hub wheel 4a, 5a Inner rolling surface 5 Inner ring 6 Wheel mounting flange 6a Hub bolt 6b Base 7 on the inner side of the wheel mounting flange 7 Clamping portion 8 Cage 9 Seals 10, 10 ', 20, 21, 23, 25, 28, 29 Protective covers 10a, 14a, 20a, 21a, 23a 25a, 28a, 29a Fitting portion 10b Shielding portion 10c Bending portion 10d Bottom portion 11 Core 12 Seal member 12a Side lip 12b Dustrip 12c Grease lip 13 Pulsar ring 14 Support ring 14b Standing plate portion 15 Magnetic encoder 16 Rotational speed sensor 17, 24a, 26a Cylindrical portions 17a, 17b, 26b Locking portion 18 Reduced diameter portion 19 Elastic member 19a Annular protrusion 22 Polymerization 24b Folded portions 27, 27 'Annular grooves 30, 31 Chamfered portion 51 Inner member 52 Outer member 52a Outer rolling surface 52b Car body mounting flange 53 Ball 54 Hub wheels 54a, 55a Inner rolling surface 54b Small diameter step portion 55 Inner ring 56 Wheel mounting flange 57 Caulking portion 57a Recess 58 Cage 59 Seal 60 Protective cover 60a Fitting portion 60b Shielding portion 60c Inclined portion 60d Bottom portion 60e Stepped portion 61 Support ring 62 Magnetic encoder d1 Inner diameter of protective cover fitting portion d2 Outer diameter of the reduced diameter portion of the protective cover d3 Chamfered diameter of the protective cover d4 Inner diameter of the chamfered portion of the outer member t0 Thickness of the plate other than the fitted portion of the protective cover t1 Thickness of the fitted portion of the protective cover

Claims (11)

外周にナックルに取り付けられるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、
一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪とからなり、外周に前記複列の外側転走面に対向する複列の内側転走面が形成された内方部材と、
前記外方部材と内方部材のそれぞれの転走面間に転動自在に収容された複列の転動体と、
前記内輪に外嵌され、円周方向に特性を交互に、かつ等間隔に変化させたパルサリングと、
前記外方部材のインナー側の端部に嵌着され、非磁性体の鋼板からプレス加工により形成されたカップ状の保護カバーとを備え、
この保護カバーを介して回転速度センサが前記パルサリングに所定の軸方向エアギャップで対峙されている回転速度検出装置付き車輪用軸受装置において、
前記保護カバーが、前記外方部材のインナー側の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向内方に延び、前記パルサリングに僅かな軸方向すきまを介して対峙する円板状の遮蔽部と、この遮蔽部から屈曲部を介して前記内方部材のインナー側の端部を覆う底部とを備えると共に、前記保護カバーの嵌合部が他の部位よりも剛性が高く設定されていることを特徴とする回転速度検出装置付き車輪用軸受装置。 An outer member integrally having a vehicle body mounting flange for being attached to the knuckle on the outer periphery, and an outer rolling surface of a double row integrally formed on the inner periphery;
A hub wheel integrally having a wheel mounting flange for mounting a wheel at one end, and having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub ring; An inner member in which a double row inner rolling surface facing the outer rolling surface of the double row is formed on the outer periphery,
A double row rolling element accommodated in a freely rolling manner between the rolling surfaces of the outer member and the inner member;
Pulsar ring that is externally fitted to the inner ring, and the characteristics are changed alternately and at equal intervals in the circumferential direction;
A cup-shaped protective cover that is fitted to the inner side end of the outer member and formed by pressing from a non-magnetic steel plate;
In the wheel bearing device with a rotational speed detection device in which the rotational speed sensor is opposed to the pulsar ring with a predetermined axial air gap through the protective cover,
The protective cover is press-fitted into an inner periphery of the outer member on the inner side, and a cylindrical fitting portion extends radially inward from the fitting portion through a slight axial clearance in the pulsar ring. And a bottom part covering the inner side end of the inner member from the shielding part through a bent part, and the fitting part of the protective cover is more than the other part. The wheel bearing device with a rotational speed detection device is characterized in that the rigidity is also set high. 前記嵌合部の板厚が他の部位の板厚よりも肉厚に形成されている請求項１に記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotational speed detection device according to claim 1, wherein the thickness of the fitting portion is formed to be thicker than the thickness of other portions. 前記嵌合部の外周面に接着剤または液体パッキンが塗布されている請求項１または２に記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotation speed detection device according to claim 1 or 2, wherein an adhesive or liquid packing is applied to an outer peripheral surface of the fitting portion. 前記嵌合部が前記外方部材の嵌合面に金属嵌合される円筒部と、この円筒部から軸方向に延びる縮径部で構成され、この縮径部の外周面に合成ゴムからなる弾性部材が加硫接着により一体に接合されている請求項１または２に記載の回転速度検出装置付き車輪用軸受装置。   The fitting portion includes a cylindrical portion that is metal-fitted to the fitting surface of the outer member, and a reduced diameter portion that extends in the axial direction from the cylindrical portion, and the outer peripheral surface of the reduced diameter portion is made of synthetic rubber. The wheel bearing device with a rotational speed detection device according to claim 1 or 2, wherein the elastic member is integrally joined by vulcanization adhesion. 前記嵌合部の円筒部が、その端部を内径側に折曲させて形成した重合部で構成されている請求項４に記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotational speed detection device according to claim 4, wherein the cylindrical portion of the fitting portion is configured by a superposed portion formed by bending an end portion thereof toward an inner diameter side. 前記嵌合部の円筒部が、その端部から径方向内方に延びる折曲部を備えている請求項４に記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotational speed detection device according to claim 4, wherein the cylindrical portion of the fitting portion includes a bent portion extending radially inward from an end portion thereof. 前記嵌合部の円筒部が、その端部から径方向外方に突出した係止部を備え、前記外方部材の端部内周に形成された環状溝に係合されている請求項４に記載の回転速度検出装置付き車輪用軸受装置。   The cylindrical portion of the fitting portion includes a locking portion protruding radially outward from an end portion thereof, and is engaged with an annular groove formed on an inner periphery of the end portion of the outer member. The bearing apparatus for wheels with a rotational speed detection apparatus of description. 前記係止部に面取り部が形成され、この面取り部の径が前記外方部材の内径端部に形成された面取り部の径よりも小径に設定されている請求項７に記載の回転速度検出装置付き車輪用軸受装置。   The rotation speed detection according to claim 7, wherein a chamfered portion is formed in the locking portion, and a diameter of the chamfered portion is set smaller than a diameter of a chamfered portion formed at an inner diameter end portion of the outer member. Wheel bearing device with device. 前記嵌合部の開口端部に軸方向に延びるスリットが形成されている請求項２乃至８いずれかに記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotational speed detection device according to any one of claims 2 to 8, wherein a slit extending in an axial direction is formed at an opening end portion of the fitting portion. 前記嵌合部の開口端部の内径が前記縮径部の外径よりも小径に設定されている請求項４に記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotational speed detection device according to claim 4, wherein an inner diameter of an opening end portion of the fitting portion is set to be smaller than an outer diameter of the reduced diameter portion. 前記保護カバーが嵌合される前記外方部材の嵌合面と、前記前記外方部材の内径端部に形成された面取り部が総型砥石によって同時に研削加工されている請求項１に記載の回転速度検出装置付き車輪用軸受装置。   The fitting surface of the said outer member with which the said protective cover is fitted, and the chamfered part formed in the internal-diameter end part of the said outer member are grind-processed simultaneously with a total type grindstone. Wheel bearing device with rotation speed detector.
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JP2015172401A (en) * 2014-03-12 2015-10-01 Ntn株式会社 Bearing device for wheel
FR3019241A1 (en) * 2014-03-25 2015-10-02 Ntn Snr Roulements BEARING EQUIPPED WITH SEALING ELEMENT AND ASSOCIATED ASSEMBLY METHOD

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JP2009025309A (en) * 2007-07-20 2009-02-05 Snr Roulements Assembly for forming bearing housing equipped with information sensing system
JP2010078018A (en) * 2008-09-25 2010-04-08 Nsk Ltd Rolling bearing unit with rotating speed detecting device
JP2010151279A (en) * 2008-12-26 2010-07-08 Ntn Corp Wheel bearing device with rotation speed detector
JP2010180912A (en) * 2009-02-03 2010-08-19 Nsk Ltd Roller bearing unit with rotation speed detection device
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JP2001289254A (en) * 2000-02-01 2001-10-19 Ntn Corp Bearing for axle
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JP2010078018A (en) * 2008-09-25 2010-04-08 Nsk Ltd Rolling bearing unit with rotating speed detecting device
JP2010151279A (en) * 2008-12-26 2010-07-08 Ntn Corp Wheel bearing device with rotation speed detector
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JP2015172401A (en) * 2014-03-12 2015-10-01 Ntn株式会社 Bearing device for wheel
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FR3019241A1 (en) * 2014-03-25 2015-10-02 Ntn Snr Roulements BEARING EQUIPPED WITH SEALING ELEMENT AND ASSOCIATED ASSEMBLY METHOD

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