JP2008286268A - Wheel bearing device with rotational speed detection device - Google Patents

Wheel bearing device with rotational speed detection device Download PDF

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Publication number
JP2008286268A
JP2008286268A JP2007130149A JP2007130149A JP2008286268A JP 2008286268 A JP2008286268 A JP 2008286268A JP 2007130149 A JP2007130149 A JP 2007130149A JP 2007130149 A JP2007130149 A JP 2007130149A JP 2008286268 A JP2008286268 A JP 2008286268A
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Japan
Prior art keywords
slinger
diameter
seal
rotational speed
ring
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JP2007130149A
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Japanese (ja)
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Yuushiro Ono
祐志郎 小野
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2007130149A priority Critical patent/JP2008286268A/en
Priority to PCT/JP2008/001225 priority patent/WO2008139739A1/en
Priority to CN2008800162155A priority patent/CN101688878B/en
Priority to DE112008001279T priority patent/DE112008001279T5/en
Publication of JP2008286268A publication Critical patent/JP2008286268A/en
Priority to US12/618,982 priority patent/US8360649B2/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a wheel bearing device with a rotational speed detection device that secures a sealing performance of a seal and increases reliability. <P>SOLUTION: The seal 11 comprises a sealing plate 21, which consists of a core metal 24 and a sealing member 25, and a slinger 22. This slinger 22 has a cylindrical portion 22a, which is press-inserted into an inner ring 6 to which a pulsar ring 23 is press-fixed and a magnetic encoder 28 is joined to its outside diameter portion. A disklike cover 32 is mounted at the inner side of a sensor holder 20 and a labyrinth seal 33 is formed by making the inside diameter of the cover 32 face a shoulder portion 17 of an outside joint member 12 via a slight gap in the radial direction. When the inside diameter of the cover is represented as ϕA, the outside diameter of the shoulder of the outside joint member as ϕB, the outside diameter of the slinger as ϕC, and the gap in the axial direction between the cover and the slinger as D, the inside diameter ϕA of the cover is set in the range of ϕB+D≤ϕA≤ϕC-D. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、自動車等の車輪の回転速度を検出する回転速度センサを内蔵し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 relates to a wheel bearing device with a rotation speed detection device that includes a rotation speed sensor that detects the rotation speed of a wheel of an automobile or the like.

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)を制御するために車輪の回転速度を検出する装置が軸受に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 in which a wheel of an automobile is rotatably supported with respect to a suspension device and a device for detecting the rotation speed of the wheel for controlling an anti-lock brake system (ABS) is incorporated in the bearing. 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 the air gap adjustment work between the rotation speed sensor and the magnetic encoder and to achieve further compactness, recently, a bearing apparatus for a wheel with a rotation speed detection device in which the rotation speed sensor is also incorporated in the bearing. 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4に示すような構造が知られている。この回転速度検出装置付き車輪用軸受装置50は、外方部材51と、この外方部材51に複列のボール52を介して内挿された内方部材53と、外方部材51の端部に装着された回転速度検出装置54とを備えている。   A structure as shown in FIG. 4 is known as an example of such a wheel bearing device with a rotational speed detection device. The wheel bearing device 50 with a rotational speed detection device includes an outer member 51, an inner member 53 inserted into the outer member 51 via double rows of balls 52, and an end of the outer member 51. And a rotational speed detecting device 54 mounted on the head.

外方部材51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51bを一体に有し、内周に複列の外側転走面51a、51aが一体に形成されている。   The outer member 51 integrally has a vehicle body mounting flange 51b to be attached to a knuckle (not shown) constituting a suspension device on the outer periphery, and double row outer rolling surfaces 51a, 51a are integrated on the inner periphery. Is formed.

一方、内方部材53は、ハブ輪55と、このハブ輪55に固定された内輪56とからなる。ハブ輪55は、一端部に車輪(図示せず)を取り付けるための車輪取付フランジ57を一体に有し、外周に前記複列の外側転走面51a、51aの一方に対向する内側転走面55aと、この内側転走面55aから軸方向に延びる円筒状の小径段部55bが形成されている。内輪56は、外周に前記複列の外側転走面51a、51aの他方に対向する内側転走面56aが形成され、ハブ輪55の小径段部55bに所定のシメシロを介して圧入されている。   On the other hand, the inner member 53 includes a hub wheel 55 and an inner ring 56 fixed to the hub wheel 55. The hub wheel 55 integrally has a wheel mounting flange 57 for mounting a wheel (not shown) at one end portion, and an inner rolling surface facing one of the double-row outer rolling surfaces 51a and 51a on the outer periphery. 55a and a cylindrical small diameter step portion 55b extending in the axial direction from the inner rolling surface 55a are formed. The inner ring 56 is formed with an inner rolling surface 56a opposite to the other of the double row outer rolling surfaces 51a, 51a on the outer periphery, and is press-fitted into the small-diameter step portion 55b of the hub wheel 55 through a predetermined shimiro. .

外方部材51の複列の外側転走面51a、51aと、これらに対向するハブ輪55の内側転走面55aおよび内輪56の内側転走面56a間には複列のボール52、52が収容され、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51と内方部材53との間に形成される環状空間の開口部にはシール59、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。   Double rows of balls 52, 52 are disposed between the double row outer raceway surfaces 51 a, 51 a of the outer member 51, and the inner raceway surface 55 a of the hub wheel 55 and the inner raceway surface 56 a of the inner ring 56, which are opposed thereto. It is accommodated and is held by the cages 58 and 58 so as to be freely rollable. In addition, seals 59 and 60 are attached to the opening portion of the annular space formed between the outer member 51 and the inner member 53, and leakage of the lubricating grease sealed inside the bearing and the inside of the bearing from the outside. Prevents intrusion of rainwater and dust.

回転速度検出装置54は、図5に示すように、磁気センサ61が包埋されたセンサホルダ62と、シール60とからなる。センサホルダ62は、合成樹脂から射出成形により、シール60を構成する芯金65に一体にインサート成形されている。   As shown in FIG. 5, the rotational speed detection device 54 includes a sensor holder 62 in which a magnetic sensor 61 is embedded, and a seal 60. The sensor holder 62 is insert-molded integrally with a metal core 65 constituting the seal 60 by injection molding from synthetic resin.

シール60は、第1のシールリング63と第2のシールリング64とが組み合わされて構成されている。第1のシールリング63は、一つの剛性リングによって形成された芯金65と、この芯金65に被着されたシール部材66とからなる。芯金65は、外方部材51の端部に内嵌された嵌合用円筒部65aと、同円筒部65aから径方向内方に延びる外側フランジ部65bと、このフランジ部65bから軸方向外方(左方)に延びる水分浸入防止用円筒部65cと、および同円筒部65cから径方向内方に延びる内側フランジ部65dを有している。そして、この内側フランジ部65dの内周縁部にシール部材66が接着されている。   The seal 60 is configured by combining a first seal ring 63 and a second seal ring 64. The first seal ring 63 includes a cored bar 65 formed by a single rigid ring, and a seal member 66 attached to the cored bar 65. The cored bar 65 includes a fitting cylindrical portion 65a fitted in the end portion of the outer member 51, an outer flange portion 65b extending radially inward from the cylindrical portion 65a, and an axially outward direction from the flange portion 65b. It has a moisture intrusion preventing cylindrical portion 65c extending to the left and an inner flange portion 65d extending radially inward from the cylindrical portion 65c. And the sealing member 66 is adhere | attached on the inner peripheral part of this inner side flange part 65d.

第2のシールリング64は、内輪56に装着され、断面が略L字状に形成されたスリンガ67と、このスリンガ67に外嵌されたパルサリング68とからなる。スリンガ67は、内輪56の小径部56bに圧入された円筒部67aと、この円筒部67aから径方向外方に延びる外向きフランジ部67bとを有し、円筒部67aの内径には、内輪56の端面に摺接するアキシアルリップ69aを有する弾性シール69が設けられている。   The second seal ring 64 includes a slinger 67 that is attached to the inner ring 56 and has a substantially L-shaped cross section, and a pulsar ring 68 that is externally fitted to the slinger 67. The slinger 67 has a cylindrical portion 67a that is press-fitted into the small-diameter portion 56b of the inner ring 56, and an outward flange portion 67b that extends radially outward from the cylindrical portion 67a. An elastic seal 69 having an axial lip 69a that is in sliding contact with the end face is provided.

パルサリング68は、環状の支持部材70と、これに接着された着磁体71とからなる。支持部材70は、スリンガ67の円筒部67aに圧入される小径円筒部70aと、この小径円筒部70aから径方向外方に延びる連結部70b、およびこの連結部70bから軸方向内方に延び、内輪56の大径部56cより大径に形成された大径円筒部70cからなる。そして、この大径円筒部70cに着磁体71が接着されている。この着磁体71は、磁性粉を含有したゴムまたは樹脂を加硫接着して周方向交互にN極、S極を配置するように径方向から着磁され、芯金65の水分浸入防止用円筒部65cに接触しない範囲で磁気センサ61に対向配置されている。   The pulsar ring 68 includes an annular support member 70 and a magnetized body 71 bonded thereto. The support member 70 is a small-diameter cylindrical portion 70a that is press-fitted into the cylindrical portion 67a of the slinger 67, a connecting portion 70b that extends radially outward from the small-diameter cylindrical portion 70a, and an axially inward extending from the connecting portion 70b. The inner ring 56 includes a large-diameter cylindrical portion 70c formed with a larger diameter than the large-diameter portion 56c. The magnetized body 71 is bonded to the large diameter cylindrical portion 70c. This magnetized body 71 is magnetized from the radial direction so that rubber or resin containing magnetic powder is vulcanized and bonded and the N poles and S poles are alternately arranged in the circumferential direction. The magnetic sensor 61 is disposed so as not to contact the portion 65c.

シール部材66は、スリンガ67の外向きフランジ部67bに摺接されるスリンガ側サイドリップ66aと、支持部材70の小径円筒部70aに摺接される一対のラジアルリップ66b、66cと、支持部材70の連結部70bに摺接されるパルサ側サイドリップ66dとを有している。   The seal member 66 includes a slinger side lip 66a slidably in contact with the outward flange portion 67b of the slinger 67, a pair of radial lips 66b and 66c slidably in contact with the small diameter cylindrical portion 70a of the support member 70, and the support member 70. And a pulsar side lip 66d that is in sliding contact with the connecting portion 70b.

センサホルダ62は外方部材51の端面と僅かな軸方向すきまを介して対向され、芯金65の嵌合用円筒部65aの外径の一部を露出させるように、環状の凹所72が形成されている。この凹所72にOリング73が弾性装着されと共に、センサホルダ62の外方側の端面にスリンガ67の外径よりも小径の孔径を有する円板状カバー74が装着されている。   The sensor holder 62 is opposed to the end surface of the outer member 51 through a slight axial clearance, and an annular recess 72 is formed so as to expose a part of the outer diameter of the fitting cylindrical portion 65a of the cored bar 65. Has been. An O-ring 73 is elastically mounted in the recess 72, and a disc-like cover 74 having a hole diameter smaller than the outer diameter of the slinger 67 is mounted on the outer end surface of the sensor holder 62.

回転速度検出装置54は、第1のシールリング63とパルサリング68とが組み合わされた後、パルサリング68の支持部材70がスリンガ67に圧入されることで、Oリング73を含むすべての構成が予め組み立てられ、その全体が軸方向に押圧されることにより、芯金65の嵌合用円筒部65aが外方部材51の端部に内嵌されると共に、スリンガ67の円筒部67aが内輪56の小径部56bに圧入される。このような構成により、芯金65とセンサホルダ62との分離が防止できると共に、芯金65とセンサホルダ62との境界からの水分の浸入を防止することができる。
特開2006−183701号公報
In the rotational speed detection device 54, after the first seal ring 63 and the pulsar ring 68 are combined, the support member 70 of the pulsar ring 68 is press-fitted into the slinger 67, so that all components including the O-ring 73 are assembled in advance. When the whole is pressed in the axial direction, the fitting cylindrical portion 65a of the core metal 65 is fitted into the end of the outer member 51, and the cylindrical portion 67a of the slinger 67 is a small diameter portion of the inner ring 56. It is press-fitted into 56b. With such a configuration, separation of the cored bar 65 and the sensor holder 62 can be prevented, and intrusion of moisture from the boundary between the cored bar 65 and the sensor holder 62 can be prevented.
JP 2006-183701 A

然しながら、こうした従来の回転速度検出装置付き車輪用軸受装置50は、雨水や泥水だけでなく小石まじりの粉塵等が跳ねかけられる過酷な環境に曝された状態で使用される。この場合、回転速度検出装置54はセンサホルダ62に装着された円板状カバー74によって保護され、検出部はシール60によって密封されているものの、泥水等が円板状カバー74内に浸入して滞留した場合、シール摺接部に泥水が固化してシール部材66が異常摩耗する恐れがある。これでは、シール機能が低下して長期間に亘って信頼性を確保することが難しい。   However, the conventional wheel bearing device 50 with a rotational speed detection device is used in a state exposed to a harsh environment in which not only rainwater and muddy water but also pebbles dust is splashed. In this case, the rotational speed detection device 54 is protected by the disc-shaped cover 74 attached to the sensor holder 62, and the detection part is sealed by the seal 60, but mud water or the like enters the disc-shaped cover 74. If it stays, muddy water may solidify at the seal sliding contact portion and the seal member 66 may be abnormally worn. In this case, the sealing function is lowered, and it is difficult to ensure reliability over a long period of time.

本発明は、このような事情に鑑みてなされたもので、シールの密封性を確保し、信頼性を向上させ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している。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a wheel bearing device with a rotational speed detection device that ensures the sealing performance of the seal and improves the reliability.

係る目的を達成すべく、本発明のうち請求項1記載の発明は、外周に懸架装置に取り付け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、この内方部材と前記外方部材の両転走面間に転動自在に収容された複列の転動体と、前記外方部材と内方部材との間に形成される環状空間の開口部に装着されたシールと、前記外方部材のインナー側の端部に装着され、合成樹脂を射出成形によって形成されて回転速度センサが包埋されたセンサホルダとを備え、前記シールのうちインナー側のシールが、環状のシール板と、断面略L字状に形成され、前記内輪の外径に圧入されたスリンガ、およびこのスリンガに外嵌され、その外径部に円周方向に関する特性が交互にかつ等間隔に変化する磁気エンコーダが設けられたパルサリングとからなり、前記シール板が、露出した部分が前記外方部材の端部に内嵌され、鋼板からプレス加工によって形成されて前記センサホルダがインサート成形された芯金と、この芯金に一体に接合され、サイドリップとラジアルリップを一体に有するシール部材とからなると共に、このシール部材のサイドリップが前記スリンガまたはパルサリングあるいは両方に摺接され、前記磁気エンコーダと回転速度センサが径方向すきまを介して対峙された回転速度検出装置付き車輪用軸受装置において、前記センサホルダのインナー側に円板状カバーが装着され、この円板状のカバーの内径が外側継手部材の肩部と僅かな径方向すきまを介して対峙してラビリンスシールが形成されると共に、円板状カバーの内径をφA、前記外側継手部材の肩部の外径をφB、前記スリンガの外径をφC、前記円板状カバーとスリンガとの軸方向すきまをDとした場合、当該円板状カバーの内径φAが、φB+D≦φA≦φC−Dの範囲に設定されている。   In order to achieve the object, the invention according to claim 1 of the present invention has a vehicle body mounting flange integrally attached to the suspension on the outer periphery, and a double row outer rolling surface is integrally formed on the inner periphery. A hub wheel having a wheel mounting flange for mounting a wheel at one end and a small-diameter step portion extending in the axial direction on the outer periphery, and press-fitting into the small-diameter step portion of the hub ring An inner member formed of at least one inner ring formed on the outer periphery and formed with a double-row inner rolling surface opposite to the double-row outer rolling surface, and both rolling of the inner member and the outer member. A double row rolling element housed between the running surfaces so as to be freely rollable, a seal attached to an opening of an annular space formed between the outer member and the inner member, and the outer member Attached to the end on the inner side and formed of synthetic resin by injection molding. A seal holder in which the inner seal is an annular seal plate, a slinger formed in a substantially L-shaped cross section and press-fitted into the outer diameter of the inner ring, and the slinger And a pulsar ring provided with a magnetic encoder in which the characteristic in the circumferential direction changes alternately and at equal intervals on the outer diameter portion, and the exposed portion of the seal plate is the end of the outer member. And a metal core formed by press working from a steel plate and insert-molded with the sensor holder, and a seal member integrally joined to the metal core and having a side lip and a radial lip. The side lip of the seal member is slidably contacted with the slinger and / or the pulsar ring, and the magnetic encoder and the rotational speed sensor are connected via a radial clearance. In the wheel bearing device with a rotational speed detection device opposed to each other, a disk-shaped cover is mounted on the inner side of the sensor holder, and the inner diameter of the disk-shaped cover is slightly radial with the shoulder of the outer joint member. A labyrinth seal is formed through a gap, the inner diameter of the disc-shaped cover is φA, the outer diameter of the shoulder of the outer joint member is φB, the outer diameter of the slinger is φC, and the disc-shaped cover And the slinger in the axial direction, the inner diameter φA of the disc-shaped cover is set in the range of φB + D ≦ φA ≦ φC−D.

このように、外方部材と内方部材との間に形成される環状空間の開口部に装着されたシールと、外方部材のインナー側の端部に装着され、合成樹脂を射出成形によって形成されて回転速度センサが包埋されたセンサホルダとを備え、シールのうちインナー側のシールが、環状のシール板と、断面略L字状に形成され、内輪の外径に圧入されたスリンガ、およびこのスリンガに外嵌され、その外径部に円周方向に関する特性が交互にかつ等間隔に変化する磁気エンコーダが設けられたパルサリングとからなり、シール板が、露出した部分が外方部材の端部に内嵌され、鋼板からプレス加工によって形成されてセンサホルダがインサート成形された芯金と、この芯金に一体に接合され、サイドリップとラジアルリップを一体に有するシール部材とからなると共に、このシール部材のサイドリップがスリンガまたはパルサリングあるいは両方に摺接され、磁気エンコーダと回転速度センサが径方向すきまを介して対峙された回転速度検出装置付き車輪用軸受装置において、センサホルダのインナー側に円板状カバーが装着され、この円板状のカバーの内径が外側継手部材の肩部と僅かな径方向すきまを介して対峙してラビリンスシールが形成されると共に、円板状カバーの内径をφA、外側継手部材の肩部の外径をφB、スリンガの外径をφC、円板状カバーとスリンガとの軸方向すきまをDとした場合、当該円板状カバーの内径φAが、φB+D≦φA≦φC−Dの範囲に設定されているので、雨水や泥水だけでなく小石まじりの粉塵等が跳ねかけられる過酷な環境に曝された状態で使用されても、効果的にこの円板状カバーによって所望の密封性を確保することができ、長期間に亘って安定した速度検出をすることができる信頼性の高い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, a seal attached to the opening of the annular space formed between the outer member and the inner member, and an end on the inner side of the outer member, synthetic resin is formed by injection molding A sensor holder in which the rotational speed sensor is embedded, and an inner seal of the seals is an annular seal plate and a slinger formed in a substantially L-shaped cross section and press-fitted into the outer diameter of the inner ring, And a pulsar ring that is externally fitted to the slinger and has a magnetic encoder in which the characteristic in the circumferential direction changes alternately and at equal intervals on the outer diameter portion, and the exposed portion of the seal plate is the outer member. A metal core that is fitted into the end and formed by press working from a steel plate and the sensor holder is insert-molded; and a seal member that is integrally joined to the metal core and has a side lip and a radial lip. And a sensor holder in a wheel bearing device with a rotational speed detection device in which a side lip of the seal member is slidably contacted with a slinger, a pulsar ring, or both, and a magnetic encoder and a rotational speed sensor are opposed to each other via a radial clearance. A disc-shaped cover is attached to the inner side of the disc, and the inner diameter of the disc-shaped cover is opposed to the shoulder of the outer joint member through a slight radial clearance to form a labyrinth seal. When the inner diameter of the cover is φA, the outer diameter of the shoulder of the outer joint member is φB, the outer diameter of the slinger is φC, and the axial clearance between the disc-shaped cover and the slinger is D, the inner diameter φA of the disc-shaped cover However, since it is set in the range of φB + D ≦ φA ≦ φC-D, it is used in a state exposed to harsh environments where not only rainwater and muddy water but also pebbles dust is splashed. However, this disc-shaped cover can effectively secure a desired sealing performance and can stably detect the speed over a long period of time. Can be provided.

また、請求項2に記載の発明のように、前記外側継手部材の肩部が前記内輪の大端面に衝合され、前記肩部の外径が前記内輪の外径よりも小径に設定されると共に、前記スリンガに弾性リップが一体に接合され、前記内輪の端面に接していれば、スリンガと内輪との嵌合部から雨水や泥水が内部に浸入するのを防止することができる。   According to a second aspect of the present invention, the shoulder portion of the outer joint member is abutted against the large end surface of the inner ring, and the outer diameter of the shoulder portion is set smaller than the outer diameter of the inner ring. At the same time, if an elastic lip is integrally joined to the slinger and is in contact with the end face of the inner ring, it is possible to prevent rainwater and muddy water from entering the inside from the fitting portion between the slinger and the inner ring.

また、請求項3に記載の発明のように、前記スリンガと円板状カバーが、防錆能を有する鋼板からプレス加工によって形成されていれば、長期間に亘って安定した密封性を確保することができる。   Moreover, if the said slinger and a disk-shaped cover are formed by the press work from the steel plate which has rust prevention ability like invention of Claim 3, a stable sealing property is ensured over a long period of time. be able to.

また、請求項4に記載の発明のように、前記内輪の外径に小径部と大径部が形成され、前記スリンガが、前記小径部に圧入される円筒部、およびこの円筒部から径方向外方に延びる立板部を有し、前記円筒部に前記パルサリングを構成する支持部材の内径部が圧入固定され、当該支持部材が前記内径部から径方向外方に延びる立板部と、この立板部から軸受内方側に延び、前記大径部よりも僅かに大径に形成された円筒状の外径部を有し、この外径部に前記磁気エンコーダが接合されると共に、前記シール部材のサイドリップが前記スリンガと支持部材の立板部に摺接され、前記ラジアルリップが前記パルサリングの内径部に摺接されていれば、密封性を向上させてパルサリングが雨水やダスト等により汚れるのを防止することができる。   According to a fourth aspect of the present invention, a small-diameter portion and a large-diameter portion are formed on the outer diameter of the inner ring, and the slinger is pressed into the small-diameter portion, and a radial direction from the cylindrical portion An upright plate portion extending outward, and an inner diameter portion of a support member constituting the pulsar ring is press-fitted and fixed to the cylindrical portion, and the support member extends from the inner diameter portion radially outward, A cylindrical outer diameter portion extending from the upright plate portion to the bearing inward side and having a slightly larger diameter than the large diameter portion, and the magnetic encoder is joined to the outer diameter portion, If the side lip of the seal member is slidably contacted with the slinger and the upright plate portion of the support member, and the radial lip is slidably contacted with the inner diameter portion of the pulsar ring, the sealing performance is improved and the pulsar ring is caused by rainwater or dust. It can prevent getting dirty.

また、請求項5に記載の発明のように、前記支持部材が、強磁性体の鋼鈑からプレス加工によって形成されると共に、前記磁気エンコーダが、エラストマに磁性体粉が混入され、周方向に交互に磁極N、Sが着磁されていれば、強磁性体からなる支持部材と相俟って出力信号が強くなり安定した検出精度を確保することができる。   According to a fifth aspect of the present invention, the support member is formed of a ferromagnetic steel plate by pressing, and the magnetic encoder is mixed with elastomer powder in the circumferential direction. If the magnetic poles N and S are alternately magnetized, the output signal becomes strong in combination with the support member made of a ferromagnetic material, and stable detection accuracy can be ensured.

本発明に係る回転速度検出装置付き車輪用軸受装置は、外周に懸架装置に取り付け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、この内方部材と前記外方部材の両転走面間に転動自在に収容された複列の転動体と、前記外方部材と内方部材との間に形成される環状空間の開口部に装着されたシールと、前記外方部材のインナー側の端部に装着され、合成樹脂を射出成形によって形成されて回転速度センサが包埋されたセンサホルダとを備え、前記シールのうちインナー側のシールが、環状のシール板と、断面略L字状に形成され、前記内輪の外径に圧入されたスリンガ、およびこのスリンガに外嵌され、その外径部に円周方向に関する特性が交互にかつ等間隔に変化する磁気エンコーダが設けられたパルサリングとからなり、前記シール板が、露出した部分が前記外方部材の端部に内嵌され、鋼板からプレス加工によって形成されて前記センサホルダがインサート成形された芯金と、この芯金に一体に接合され、サイドリップとラジアルリップを一体に有するシール部材とからなると共に、このシール部材のサイドリップが前記スリンガまたはパルサリングあるいは両方に摺接され、前記磁気エンコーダと回転速度センサが径方向すきまを介して対峙された回転速度検出装置付き車輪用軸受装置において、前記センサホルダのインナー側に円板状カバーが装着され、この円板状のカバーの内径が外側継手部材の肩部と僅かな径方向すきまを介して対峙してラビリンスシールが形成されると共に、円板状カバーの内径をφA、前記外側継手部材の肩部の外径をφB、前記スリンガの外径をφC、前記円板状カバーとスリンガとの軸方向すきまをDとした場合、当該円板状カバーの内径φAが、φB+D≦φA≦φC−Dの範囲に設定されているので、充分なラビリンス機能を発揮することができると共に、肩部との干渉を防止することができる。したがって、雨水や泥水だけでなく小石まじりの粉塵等が跳ねかけられる過酷な環境に曝された状態で使用されても、効果的にこの円板状カバーによって所望の密封性を確保することができ、長期間に亘って安定した速度検出をすることができる信頼性の高い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 a vehicle body mounting flange integrally attached to the suspension 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 formed of two inner rings and having an outer periphery formed with a double-row inner rolling surface opposite to the double-row outer rolling surface, and between both rolling surfaces of the inner member and the outer member. A double row rolling element housed in a freely rollable manner, a seal mounted in an opening of an annular space formed between the outer member and the inner member, and an inner end of the outer member Is attached to the part and formed by injection molding of synthetic resin to wrap the rotational speed sensor. An inner seal out of the seals, a slinger formed in a substantially L-shaped cross section and press-fitted into the outer diameter of the inner ring, and an outer fit to the slinger And a pulsar ring provided with a magnetic encoder whose characteristics in the circumferential direction are alternately and equally spaced at the outer diameter portion, and the exposed portion of the seal plate is located at the end of the outer member. It is formed of a core metal that is fitted and formed by press working from a steel plate and the sensor holder is insert-molded, and a seal member that is integrally joined to the core metal and integrally includes a side lip and a radial lip. The side lip of the member is slidably contacted with the slinger and / or pulsar ring, and the magnetic encoder and rotational speed sensor are opposed to each other via a radial clearance. In the wheel bearing device with a rotational speed detection device, a disk-shaped cover is mounted on the inner side of the sensor holder, and the inner diameter of the disk-shaped cover has a slight radial clearance from the shoulder of the outer joint member. A labyrinth seal is formed by facing each other, the inner diameter of the disc-shaped cover is φA, the outer diameter of the shoulder portion of the outer joint member is φB, the outer diameter of the slinger is φC, and the disc-shaped cover and slinger When the clearance in the axial direction is D, the inner diameter φA of the disc-shaped cover is set in the range of φB + D ≦ φA ≦ φC−D, so that a sufficient labyrinth function can be exhibited and the shoulder Interference with the part can be prevented. Therefore, even when used in a harsh environment where not only rainwater and muddy water but also pebbles dust is splashed, this disc-shaped cover can effectively secure the desired sealing performance. Thus, it is possible to provide a wheel bearing device with a highly reliable rotational speed detection device capable of detecting a stable speed over a long period of time.

外周に懸架装置に取り付け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両転走面間に転動自在に収容された複列の転動体と、前記外方部材と内方部材との間に形成される環状空間の開口部に装着されたシールと、前記外方部材のインナー側の端部に装着され、合成樹脂を射出成形によって形成されて回転速度センサが包埋されたセンサホルダとを備え、前記シールのうちインナー側のシールが、環状のシール板と、断面略L字状に形成されたスリンガ、およびこのスリンガに外嵌されたパルサリングとからなり、前記シール板が、露出した部分が前記外方部材の端部に内嵌される外径円筒部と、この外径円筒部から径方向内方に延びる立板部と、この立板部からインナー側に延びる内径円筒部、およびこの内径円筒部から径方向内方に延びる内径部を有し、鋼板からプレス加工によって形成されて前記センサホルダがインサート成形された芯金と、この芯金の内径部に一体に接合され、サイドリップとラジアルリップを一体に有するシール部材とからなると共に、前記スリンガが、前記内輪の外径の小径部に圧入された円筒部、およびこの円筒部から径方向外方に延びる立板部を有し、前記円筒部に前記パルサリングが圧入固定され、その外径部に磁気エンコーダが接合され、エラストマに磁性体粉が混入され、周方向に交互に磁極N、Sが着磁されて前記芯金の内径円筒部に接触しない範囲で前記回転速度センサに径方向すきまを介して対向配置されると共に、前記シール部材のサイドリップが前記スリンガに摺接され、前記ラジアルリップが前記パルサリングに摺接された回転速度検出装置付き車輪用軸受装置において、前記センサホルダのインナー側に円板状カバーが装着され、この円板状のカバーの内径が外側継手部材の肩部と僅かな径方向すきまを介して対峙してラビリンスシールが形成されると共に、円板状カバーの内径をφA、前記外側継手部材の肩部の外径をφB、前記スリンガの外径をφC、前記円板状カバーとスリンガとの軸方向すきまをDとした場合、当該円板状カバーの内径φAが、φB+D≦φA≦φC−Dの範囲に設定されている。   An outer member integrally having a vehicle body mounting flange for mounting to a suspension device on the outer periphery, a double row outer rolling surface formed integrally on the inner periphery, and a wheel mounting flange for mounting 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 comprising an inner ring that is press-fitted into a small-diameter step portion and has an outer race formed with an inner race surface facing the other of the outer row raceways in the double row, and both the inner member and the outer member. A double row rolling element housed between the rolling surfaces so as to be freely rollable, a seal attached to an opening of an annular space formed between the outer member and the inner member, and the outer member Is attached to the inner side end of the plastic and is formed by injection molding of a synthetic resin. The inner seal of the seals is composed of an annular seal plate, a slinger having a substantially L-shaped cross section, and a pulsar ring that is externally fitted to the slinger. An outer diameter cylindrical portion in which an exposed portion of the plate is fitted into an end portion of the outer member, a standing plate portion extending radially inward from the outer diameter cylindrical portion, and an inner side from the standing plate portion An inner diameter cylindrical portion that extends, and an inner diameter portion that extends radially inward from the inner diameter cylindrical portion, and is formed by pressing from a steel plate, and the sensor holder is insert-molded. The seal member is integrally joined and has a side lip and a radial lip, and the slinger is press-fitted into a small-diameter portion of the outer diameter of the inner ring, and radially outward from the cylindrical portion. The pulsar ring is press-fitted and fixed to the cylindrical portion, a magnetic encoder is joined to the outer diameter portion, magnetic powder is mixed into the elastomer, and magnetic poles N and S are alternately arranged in the circumferential direction. The radial lip is disposed so as to be opposed to the rotational speed sensor via a radial clearance as long as it is magnetized and does not contact the inner diameter cylindrical portion of the core metal, and the side lip of the seal member is slidably contacted with the slinger. In the wheel bearing device with a rotational speed detection device in sliding contact with the pulsar ring, a disk-shaped cover is attached to the inner side of the sensor holder, and the inner diameter of the disk-shaped cover is the shoulder of the outer joint member. A labyrinth seal is formed through a slight radial clearance, the inner diameter of the disc-shaped cover is φA, the outer diameter of the shoulder of the outer joint member is φB, and the outer surface of the slinger The [phi] C, when the axial gap between the disk-like cover and the slinger and as D, the inside diameter .phi.A of the disc-shaped cover is set in a range of φB + D ≦ φA ≦ φC-D.

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の要部拡大図、図3は、図2の円板状カバー周辺部を示す拡大図である。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(図面左側)、中央寄り側をインナー側(図面右側)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 of FIG. 1, and FIG. 3 is a disk-like cover of FIG. It is an enlarged view which shows a peripheral part. In the following description, the side closer to the outer side of the vehicle in a state assembled to the vehicle is referred to as the outer side (left side in the drawing), and the side closer to the center is referred to as the inner side (right side in the drawing).

この回転速度検出装置付き車輪用軸受装置は駆動輪用の第3世代構造と呼称され、ハブ輪1と複列の転がり軸受2および等速自在継手8をユニット化して構成されている。複列の転がり軸受2は、外方部材3と内方部材4、および複列の転動体(ボール)5、5を備えている。   This wheel bearing device with a rotational speed detection device is called a third generation structure for driving wheels, and is constituted by unitizing the hub wheel 1, the double row rolling bearing 2 and the constant velocity universal joint 8. The double row rolling bearing 2 includes an outer member 3, an inner member 4, and double row rolling elements (balls) 5, 5.

外方部材3はS53C等の炭素0.40〜0.80wt%を含む中高炭素鋼からなり、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3bを一体に有し、内周に複列の外側転走面3a、3aが一体に形成されている。そして、これら複列の外側転走面3a、3a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。   The outer member 3 is made of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and a vehicle body mounting flange 3b to be attached to a knuckle (not shown) constituting a suspension device is integrally formed on the outer periphery. And double row outer rolling surfaces 3a, 3a are integrally formed on the inner periphery. And these double row outer side rolling surfaces 3a and 3a are hardened in the surface hardness of the range of 58-64HRC by induction hardening.

一方、内方部材4は、ハブ輪1と、このハブ輪1に固定された内輪6とからなる。ハブ輪1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7を一体に有し、外周に前記複列の外側転走面3a、3aの一方(アウター側)に対向する内側転走面1aと、この内側転走面1aから軸方向に延びる円筒状の小径段部1bが形成され、内周にトルク伝達用のセレーション(またはスプライン)1cが形成されている。なお、車輪取付フランジ7の円周等配位置には車輪を取り付けるハブボルト7aが植設されている。   On the other hand, the inner member 4 includes a hub wheel 1 and an inner ring 6 fixed to the hub wheel 1. The hub wheel 1 integrally has a wheel mounting flange 7 for mounting a wheel (not shown) at an end portion on the outer side, and one (outer side) of the outer raceway surfaces 3a and 3a of the double row on the outer periphery. And a cylindrical small-diameter step portion 1b extending in the axial direction from the inner rolling surface 1a, and a serration (or spline) 1c for torque transmission is formed on the inner periphery. . Note that hub bolts 7 a for attaching the wheels are planted at equal circumferential positions of the wheel mounting flanges 7.

ハブ輪1はS53C等の炭素0.40〜0.80wt%を含む中高炭素鋼からなり、内側転走面1aをはじめ、後述するアウター側のシール10が摺接する車輪取付フランジ7の基部7bから小径段部1b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。   The hub wheel 1 is made of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and includes a base 7b of a wheel mounting flange 7 on which an outer-side seal 10 to be described later comes into sliding contact, including the inner rolling surface 1a. The surface hardness is hardened in the range of 58 to 64 HRC by induction hardening over the small diameter step 1b.

内輪6は、外周に前記複列の外側転走面3a、3aの他方(インナー側)に対向する内側転走面6aが形成され、ハブ輪1の小径段部1bに所定のシメシロを介して圧入固定されている。なお、内輪6および転動体5はSUJ2等の高炭素クロム鋼で形成され、ズブ焼入れによって芯部まで58〜64HRCの範囲に硬化処理されている。   The inner ring 6 is formed on the outer periphery with an inner rolling surface 6a facing the other (inner side) of the double row outer rolling surfaces 3a, 3a, and a small diameter step portion 1b of the hub wheel 1 via a predetermined squeezing. It is press-fitted and fixed. The inner ring 6 and the rolling element 5 are made of high carbon chrome steel such as SUJ2, and are hardened in the range of 58 to 64 HRC up to the core part by quenching.

外方部材3の複列の外側転走面3a、3aと、これらに対向するハブ輪1の内側転走面1aおよび内輪6の内側転走面6a間には複列の転動体5、5が収容され、保持器9、9によって転動自在に保持されている。そして、内輪6の小径側(正面側)の端面がハブ輪1の肩部に突合せ状態で衝合し、所謂背面合せタイプの複列アンギュラ玉軸受を構成している。また、外方部材3と内方部材4との間に形成される環状空間の開口部にはシール10、11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 3a and 3a of the outer member 3, and the inner raceway surface 1a of the hub wheel 1 and the inner raceway surface 6a of the inner ring 6 facing these, the double-row rolling elements 5 and 5 are provided. Is held by the cages 9 and 9 so as to be freely rollable. The end surface on the small diameter side (front side) of the inner ring 6 abuts with the shoulder portion of the hub wheel 1 in a butted state to constitute a so-called back-to-back type double-row angular ball bearing. Further, seals 10 and 11 are attached to the opening portion of the annular space formed between the outer member 3 and the inner member 4, and leakage of the lubricating grease sealed inside the bearing and the inside of the bearing from the outside. Prevents intrusion of rainwater and dust.

等速自在継手8は、外側継手部材12と継手内輪13とケージ14およびトルク伝達ボール15とを備えている。外側継手部材12は、カップ状のマウス部16と、このマウス部16の底部をなす肩部17と、この肩部17から軸方向に延びる軸部18とを一体に有している。軸部18の外周にはハブ輪1のセレーション1cに係合するセレーション(またはスプライン)18aと、このセレーション18aの端部に雄ねじ18bが形成されている。そして、内輪6の端面と肩部17が衝合するまで、ハブ輪1にセレーション1c、18aを介して外側継手部材12が内嵌されると共に、雄ねじ18bに締結された固定ナット19によってハブ輪1と外側継手部材12がトルク伝達可能に、かつ着脱自在にユニット化されている。   The constant velocity universal joint 8 includes an outer joint member 12, a joint inner ring 13, a cage 14 and a torque transmission ball 15. The outer joint member 12 integrally includes a cup-shaped mouth portion 16, a shoulder portion 17 that forms the bottom portion of the mouth portion 16, and a shaft portion 18 that extends from the shoulder portion 17 in the axial direction. A serration (or spline) 18a that engages with the serration 1c of the hub wheel 1 is formed on the outer periphery of the shaft portion 18, and a male screw 18b is formed at the end of the serration 18a. Then, until the end face of the inner ring 6 and the shoulder portion 17 abut each other, the outer joint member 12 is fitted into the hub ring 1 via the serrations 1c and 18a, and the hub ring is fixed by the fixing nut 19 fastened to the male screw 18b. 1 and the outer joint member 12 are unitized so that torque can be transmitted and detachable.

回転速度検出装置を構成するセンサホルダ20は外方部材3のインナー側の端部に装着されている。そして、インナー側のシール11はこのセンサホルダ20と内輪6との間に形成される環状空間の開口部に装着されている。シール11は、図2に示すように、断面略L字状に形成された環状のシール板21とスリンガ22を備え、互いに対向して配置されている。パルサリング23はスリンガ22に外嵌されている。   The sensor holder 20 constituting the rotational speed detection device is attached to the inner side end of the outer member 3. The inner seal 11 is attached to an opening of an annular space formed between the sensor holder 20 and the inner ring 6. As shown in FIG. 2, the seal 11 includes an annular seal plate 21 and a slinger 22 each having a substantially L-shaped cross section, and is disposed to face each other. The pulsar ring 23 is fitted on the slinger 22.

シール板21は、芯金24と、この芯金24に加硫接着等で一体に接合されたシール部材25とからなる。芯金24は、オーステナイト系ステンレス鋼鈑(JIS規格のSUS304系等)、あるいは、防錆処理された冷間圧延鋼鈑(JIS規格のSPCC系等)をプレス加工にて形成され、外方部材3の端部に内嵌される外径円筒部24aと、この外径円筒部24aから立板部24bを介して軸方向に延びる内径円筒部24cと、この内径円筒部24cから径方向内方に延びる内径部24dとを有している。外径円筒部24aは、外方部材3の端部から突出して形成され、後述するセンサホルダ20は、芯金24にインサート成形されて一体に結合されている。なお、芯金24は、回転速度センサ29の感知性能に悪影響を及ぼさないように、非磁性体のオーステナイト系ステンレス鋼鈑で形成されるのが好ましい。   The seal plate 21 includes a cored bar 24 and a seal member 25 integrally joined to the cored bar 24 by vulcanization adhesion or the like. The metal core 24 is formed by pressing an austenitic stainless steel plate (JIS standard SUS304 type or the like) or a rust-proof cold rolled steel plate (JIS standard SPCC type or the like). 3, an outer diameter cylindrical portion 24a fitted in the end portion, an inner diameter cylindrical portion 24c extending in the axial direction from the outer diameter cylindrical portion 24a via the upright plate portion 24b, and a radially inward direction from the inner diameter cylindrical portion 24c. And an inner diameter portion 24d extending in the direction. The outer diameter cylindrical portion 24a is formed so as to protrude from the end portion of the outer member 3, and the sensor holder 20, which will be described later, is insert-molded on the core metal 24 and integrally coupled. The cored bar 24 is preferably formed of a non-magnetic austenitic stainless steel plate so as not to adversely affect the sensing performance of the rotational speed sensor 29.

シール部材25は合成ゴム等の弾性部材からなり、芯金24の内径部24dに加硫接着等で一体に接合され、内径部24dを挟んでその両側にサイドリップ25a、25bと、内径部24dの内縁に一対のラジアルリップ25c、25dとを有している。   The seal member 25 is made of an elastic member such as synthetic rubber, and is integrally joined to the inner diameter portion 24d of the core metal 24 by vulcanization adhesion or the like, and the side lips 25a and 25b and the inner diameter portion 24d are disposed on both sides of the inner diameter portion 24d. A pair of radial lips 25c and 25d are provided on the inner edge of the.

スリンガ22は、オーステナイト系ステンレス鋼鈑(JIS規格のSUS304系等)、あるいは、防錆処理された冷間圧延鋼鈑(JIS規格のSPCC系等)をプレス加工にて形成され、内輪6の小径部6bの外径に圧入される円筒部22aと、この円筒部22aから径方向外方に延びる立板部22bとを有している。そして、内輪6の端面に摺接する弾性リップ26が加硫接着等で一体に接合され、嵌合部から雨水等の水分が軸受内部に浸入するのを防止している。   The slinger 22 is formed by pressing an austenitic stainless steel plate (JIS standard SUS304 type or the like) or a rust-proof cold rolled steel plate (JIS standard SPCC type or the like). It has a cylindrical portion 22a that is press-fitted into the outer diameter of the portion 6b, and a standing plate portion 22b that extends radially outward from the cylindrical portion 22a. The elastic lip 26 slidably in contact with the end face of the inner ring 6 is integrally joined by vulcanization adhesion or the like to prevent moisture such as rainwater from entering the bearing from the fitting portion.

パルサリング23は、スリンガ22に圧入される支持部材27と、この支持部材27の外径部に加硫接着により一体に接合された磁気エンコーダ28とからなる。支持部材27は、強磁性体の鋼鈑、例えば、フェライト系ステンレス鋼鈑(JIS規格のSUS430系等)あるいは防錆処理された冷間圧延鋼鈑(JIS規格のSPCC系等)からなり、プレス加工によって形成され、スリンガ22の円筒部22aに圧入される円筒状の内径部27aと、この内径部27aから径方向外方に延びる立板部27b、およびこの立板部27bから軸受内方側に延び、内輪6の大径部6よりも僅かに大径に形成された円筒状の外径部2cを有している。シール部材25のサイドリップ25a、25bは、スリンガ22と支持部材27の立板部22b、27bにそれぞれ摺接されると共に、一対のラジアルリップ25c、25dが支持部材27の円筒部27aに摺接されている。   The pulsar ring 23 includes a support member 27 that is press-fitted into the slinger 22 and a magnetic encoder 28 that is integrally joined to the outer diameter portion of the support member 27 by vulcanization adhesion. The support member 27 is made of a ferromagnetic steel plate, for example, a ferritic stainless steel plate (JIS standard SUS430 type or the like) or a rust-proof cold rolled steel plate (JIS standard SPCC type or the like), and is pressed. A cylindrical inner diameter portion 27a formed by machining and press-fitted into the cylindrical portion 22a of the slinger 22, a standing plate portion 27b extending radially outward from the inner diameter portion 27a, and a bearing inward side from the standing plate portion 27b And has a cylindrical outer diameter portion 2 c formed to have a slightly larger diameter than the large diameter portion 6 of the inner ring 6. The side lips 25a and 25b of the seal member 25 are slidably contacted with the slinger 22 and the standing plate portions 22b and 27b of the support member 27, respectively, and the pair of radial lips 25c and 25d are slidably contacted with the cylindrical portion 27a of the support member 27. Has been.

一方、磁気エンコーダ28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たゴム磁石からなり、周方向に交互に磁極N、Sが着磁され、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。そして、芯金24の内径円筒部24cに接触しない範囲で回転速度センサ19に所定の径方向すきま(エアギャップ)を介して対向配置されている。これにより、強磁性体からなる支持部材27と相俟って出力信号が強くなり安定した検出精度を確保することができる。また、こうしたシール11を構成することにより、密封性を向上させ、パルサリング23が雨水やダスト等により汚れるのを防止することができる。   On the other hand, the magnetic encoder 28 is composed of a rubber magnet in which a magnetic powder such as ferrite is mixed in an elastomer such as rubber, and magnetic poles N and S are alternately magnetized in the circumferential direction, and a rotary encoder for detecting the rotational speed of the wheel. Is configured. The rotational speed sensor 19 is disposed so as to face the rotational speed sensor 19 through a predetermined radial clearance (air gap) as long as it does not contact the inner diameter cylindrical portion 24c of the core metal 24. Thereby, coupled with the support member 27 made of a ferromagnetic material, the output signal becomes stronger, and stable detection accuracy can be ensured. Moreover, by configuring such a seal 11, it is possible to improve the sealing performance and prevent the pulsar ring 23 from being contaminated by rainwater, dust, or the like.

本実施形態では、センサホルダ20はポリフェニレンサルファイド(PPS)等の非磁性の樹脂材で形成され、磁気エンコーダ28に所定の径方向すきまを介して対峙する回転速度センサ29が包埋されている。この回転速度センサ29は、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と、この磁気検出素子の出力波形を整える波形成形回路が組み込まれたICとからなる。これにより、低コストで信頼性の高い回転速度検出ができる。なお、センサホルダ20は前述した材質以外にPA(ポリアミド)66、ポリブチレンテレフタレート(PBT)等の射出成形可能な合成樹脂を例示することができる。   In the present embodiment, the sensor holder 20 is made of a nonmagnetic resin material such as polyphenylene sulfide (PPS), and a rotational speed sensor 29 facing the magnetic encoder 28 via a predetermined radial clearance is embedded. This rotational speed sensor 29 incorporates a magnetic detecting element such as a Hall element, a magnetoresistive element (MR element) or the like that changes its characteristics according to the flow direction of magnetic flux, and a waveform shaping circuit that adjusts the output waveform of this magnetic detecting element. IC. Thereby, it is possible to detect the rotational speed with high reliability at low cost. The sensor holder 20 can be exemplified by synthetic resins that can be injection molded, such as PA (polyamide) 66, polybutylene terephthalate (PBT), in addition to the materials described above.

センサホルダ20は外方部材3の端面と僅かな軸方向すきまを介して対向され、芯金24の外径円筒部24aの外径の一部を露出させるように、環状の凹所30が形成されている。この凹所30にOリング31が弾性装着されと共に、センサホルダ20のインナー側の端面にスリンガ22の外径よりも小径の孔径を有する円板状カバー32が装着されている。   The sensor holder 20 is opposed to the end surface of the outer member 3 through a slight axial clearance, and an annular recess 30 is formed so as to expose a part of the outer diameter of the outer diameter cylindrical portion 24a of the cored bar 24. Has been. An O-ring 31 is elastically mounted in the recess 30, and a disk-shaped cover 32 having a hole diameter smaller than the outer diameter of the slinger 22 is mounted on the inner end face of the sensor holder 20.

回転速度検出装置は、シール板21とパルサリング23とが組み合わされた後、パルサリング23の支持部材27にスリンガ22が圧入されることで、Oリング31を含むすべての構成が予め組み立てられ、その全体が軸方向に押圧されることにより、芯金24の外径円筒部24aが外方部材3の端部に内嵌されると共に、スリンガ22の円筒部22aが内輪6の小径部6bに圧入される。   In the rotational speed detection device, after the seal plate 21 and the pulsar ring 23 are combined, the slinger 22 is press-fitted into the support member 27 of the pulsar ring 23 so that all the components including the O-ring 31 are assembled in advance. Is pressed in the axial direction, the outer diameter cylindrical portion 24a of the cored bar 24 is fitted into the end of the outer member 3, and the cylindrical portion 22a of the slinger 22 is press-fitted into the small diameter portion 6b of the inner ring 6. The

なお、本実施形態では、回転速度検出装置として、磁気エンコーダ28と、ホール素子等の磁気検出素子からなる回転速度センサ29とからなるアクティブタイプの回転速度検出装置を例示したが、本発明に係る回転速度検出装置はこれに限らず、例えば、歯車と、磁石と巻回された環状のコイル等からなるパッシブタイプであっても良い。   In the present embodiment, as an example of the rotational speed detection apparatus, an active type rotational speed detection apparatus including the magnetic encoder 28 and the rotational speed sensor 29 including a magnetic detection element such as a Hall element is illustrated. The rotational speed detection device is not limited to this, and may be, for example, a passive type including a gear, a magnet, and an annular coil wound around.

ここで、円板状カバー32は、オーステナイト系ステンレス鋼鈑(JIS規格のSUS304系等)、あるいは、防錆処理された冷間圧延鋼鈑(JIS規格のSPCC系等)をプレス加工にて形成され、その内縁が外側継手部材12の肩部17と僅かな径方向すきまを介して対峙してラビリンスシール33が形成されている。このラビリンスシール33の径方向すきまは、一般的に小さく設定すれば密封性が高くなるとされているが、各部位の寸法を厳しく規制しないと回転側部材(ここでは外側継手部材12の肩部17)と干渉する恐れがある。したがって、費用対効果の面で、この径方向すきまを適切な値に設定する必要がある。   Here, the disc-shaped cover 32 is formed by pressing an austenitic stainless steel plate (JIS standard SUS304 type or the like) or a rust-proof cold rolled steel plate (JIS standard SPCC type or the like). The labyrinth seal 33 is formed so that the inner edge of the outer joint member 12 faces the shoulder 17 through a slight radial clearance. The clearance in the radial direction of the labyrinth seal 33 is generally set to be small if it is set small. However, unless the dimensions of each part are strictly regulated, the rotation side member (here, the shoulder portion 17 of the outer joint member 12). ). Therefore, it is necessary to set this radial clearance to an appropriate value in terms of cost effectiveness.

本実施形態では、図3に示すように、スリンガ22との位置と寸法関係に着目し、円板状カバー32の内径寸法をφA、外側継手部材12の肩部17の外径をφB、スリンガ22の外径寸法をφC、円板状カバー32とスリンガ22との軸方向すきまをDとした場合、円板状カバー32の内径φAが、φB+D≦φA≦φC−Dの範囲に設定されている。このように設定することにより、円板状カバー32の最大内径φAmaxが、φAmax=φC−Dの場合においても、充分なラビリンス機能を発揮することができる。一方、円板状カバー32の最小内径φAminが、φAmin=φB+Dの場合においても、肩部17との干渉を防止することができる。したがって、雨水や泥水だけでなく小石まじりの粉塵等が跳ねかけられる過酷な環境に曝された状態で使用されても、効果的にこの円板状カバー32によって所望の密封性を確保することができ、長期間に亘って安定した速度検出をすることができる信頼性の高い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 embodiment, as shown in FIG. 3, paying attention to the position and dimensional relationship with the slinger 22, the inner diameter dimension of the disc-shaped cover 32 is φA, the outer diameter of the shoulder portion 17 of the outer joint member 12 is φB, and the slinger. When the outer diameter of 22 is φC and the axial clearance between the disk-shaped cover 32 and the slinger 22 is D, the inner diameter φA of the disk-shaped cover 32 is set in the range of φB + D ≦ φA ≦ φC−D. Yes. By setting in this way, a sufficient labyrinth function can be exhibited even when the maximum inner diameter φAmax of the disc-shaped cover 32 is φAmax = φCD. On the other hand, even when the minimum inner diameter φAmin of the disc-shaped cover 32 is φAmin = φB + D, interference with the shoulder portion 17 can be prevented. Therefore, even when used in a harsh environment where not only rainwater and muddy water but also pebbles dust is splashed, the disc-shaped cover 32 can effectively secure the desired sealing performance. It is possible to provide a wheel bearing device with a highly reliable rotational speed detection device that can detect a stable speed over a long period of time.

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、内輪回転構造のあらゆるタイプの回転速度検出装置が内蔵された車輪用軸受装置に適用することができる。   The wheel bearing device with a rotation speed detection device according to the present invention can be applied to a wheel bearing device in which any type of rotation speed detection device having an inner ring rotation structure is incorporated.

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の要部拡大図である。It is a principal part enlarged view of FIG. 図2の円板状カバー周辺部を示す拡大図である。It is an enlarged view which shows the disc-shaped cover periphery part 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. 図4の要部拡大図である。It is a principal part enlarged view of FIG.

符号の説明Explanation of symbols

1・・・・・・・・・・・・・・・・ハブ輪
1a、6a・・・・・・・・・・・・内側転走面
1b・・・・・・・・・・・・・・・小径段部
1c、18a・・・・・・・・・・・セレーション
2・・・・・・・・・・・・・・・・複列の転がり軸受
3・・・・・・・・・・・・・・・・外方部材
3a・・・・・・・・・・・・・・・外側転走面
3b・・・・・・・・・・・・・・・車体取付フランジ
4・・・・・・・・・・・・・・・・内方部材
5・・・・・・・・・・・・・・・・転動体
6・・・・・・・・・・・・・・・・内輪
7・・・・・・・・・・・・・・・・車輪取付フランジ
7a・・・・・・・・・・・・・・・ハブボルト
7b・・・・・・・・・・・・・・・基部
8・・・・・・・・・・・・・・・・等速自在継手
9・・・・・・・・・・・・・・・・保持器
10・・・・・・・・・・・・・・・アウター側のシール
11・・・・・・・・・・・・・・・インナー側のシール
12・・・・・・・・・・・・・・・外側継手部材
13・・・・・・・・・・・・・・・継手内輪
14・・・・・・・・・・・・・・・ケージ
15・・・・・・・・・・・・・・・トルク伝達ボール
16・・・・・・・・・・・・・・・マウス部
17・・・・・・・・・・・・・・・肩部
18・・・・・・・・・・・・・・・軸部
18b・・・・・・・・・・・・・・雄ねじ
19・・・・・・・・・・・・・・・固定ナット
20・・・・・・・・・・・・・・・センサホルダ
21・・・・・・・・・・・・・・・シール板
22・・・・・・・・・・・・・・・スリンガ
22a・・・・・・・・・・・・・・円筒部
22b、24b、27b・・・・・・立板部
23・・・・・・・・・・・・・・・パルサリング
24・・・・・・・・・・・・・・・芯金
24a・・・・・・・・・・・・・・外径円筒部
24c・・・・・・・・・・・・・・内径円筒部
24d、27a・・・・・・・・・・内径部
25・・・・・・・・・・・・・・・シール部材
25a、25b・・・・・・・・・・サイドリップ
25c、25d・・・・・・・・・・ラジアルリップ
26・・・・・・・・・・・・・・・弾性リップ
27・・・・・・・・・・・・・・・支持部材
27c・・・・・・・・・・・・・・外径部
28・・・・・・・・・・・・・・・磁気エンコーダ
29・・・・・・・・・・・・・・・回転速度センサ
30・・・・・・・・・・・・・・・凹所
31・・・・・・・・・・・・・・・Oリング
32・・・・・・・・・・・・・・・円板状カバー
33・・・・・・・・・・・・・・・ラビリンスシール
50・・・・・・・・・・・・・・・回転速度検出装置付き車輪用軸受装置
51・・・・・・・・・・・・・・・外方部材
51a・・・・・・・・・・・・・・外側転走面
51b・・・・・・・・・・・・・・車体取付フランジ
52・・・・・・・・・・・・・・・ボール
53・・・・・・・・・・・・・・・内方部材
54・・・・・・・・・・・・・・・回転速度検出装置
55・・・・・・・・・・・・・・・ハブ輪
55a、56a・・・・・・・・・・内側転走面
55b・・・・・・・・・・・・・・小径段部
56・・・・・・・・・・・・・・・内輪
56b・・・・・・・・・・・・・・小径部
56c・・・・・・・・・・・・・・大径部
57・・・・・・・・・・・・・・・車輪取付フランジ
58・・・・・・・・・・・・・・・保持器
59・・・・・・・・・・・・・・・アウター側のシール
60・・・・・・・・・・・・・・・インナー側のシール
61・・・・・・・・・・・・・・・磁気センサ
62・・・・・・・・・・・・・・・センサホルダ
63・・・・・・・・・・・・・・・第1のシールリング
64・・・・・・・・・・・・・・・第2のシールリング
65・・・・・・・・・・・・・・・芯金
65a・・・・・・・・・・・・・・嵌合用円筒部
65b・・・・・・・・・・・・・・外側フランジ部
65c・・・・・・・・・・・・・・水分浸入防止用円筒部
65d・・・・・・・・・・・・・・内側フランジ部
66・・・・・・・・・・・・・・・シール部材
66a・・・・・・・・・・・・・・スリンガ側サイドリップ
66b、66c・・・・・・・・・・ラジアルリップ
66d・・・・・・・・・・・・・・パルサ側サイドリップ
67・・・・・・・・・・・・・・・スリンガ
67a・・・・・・・・・・・・・・円筒部
67b・・・・・・・・・・・・・・外向きフランジ部
68・・・・・・・・・・・・・・・パルサリング
69・・・・・・・・・・・・・・・弾性シール
69a・・・・・・・・・・・・・・アキシアルリップ
70・・・・・・・・・・・・・・・支持部材
70a・・・・・・・・・・・・・・小径円筒部
70b・・・・・・・・・・・・・・連結部
70c・・・・・・・・・・・・・・大径円筒部
71・・・・・・・・・・・・・・・着磁体
72・・・・・・・・・・・・・・・凹所
73・・・・・・・・・・・・・・・Oリング
74・・・・・・・・・・・・・・・円板状カバー
A・・・・・・・・・・・・・・・・円板状カバーの内径寸法
Amax・・・・・・・・・・・・・円板状カバーの最大内径
Amin・・・・・・・・・・・・・円板状カバーの最小内径
B・・・・・・・・・・・・・・・・肩部の外径寸法
C・・・・・・・・・・・・・・・・スリンガの外径寸法
D・・・・・・・・・・・・・・・・スリンガと円板状カバーの軸方向すきま
1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hub wheel 1a, 6a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner rolling surface 1b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・.... Small diameter step 1c, 18a ... Serration 2 ... Double row rolling bearing 3 ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outer member 3a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outer rolling surface 3b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・Car body mounting flange 4 ... Inner member 5 ... Rolling element 6 ...・ ・ ・ ・ ・ ・ ・ ・ ・ Inner ring 7 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Wheel mounting flange 7a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hub bolt 7b ・ ・・ ・ ・ ・ ・ ・ ・ ・ Base 8 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Constant velocity universal joint 9 ・ ・ ・ ・························ 10 Side seal 12 ... outer joint member 13 ... joint inner ring 14 ...・ ・ ・ ・ ・ ・ Cage 15 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Torque transmission ball 16 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Mouse part 17・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Shoulder 18 ・ ・ ・ ・ ・ ・ ・ ・ Shaft 18b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Male thread 19 ・ ・ ・··························································································· 22 ... Slinger 22a ... ... Cylindrical parts 22b, 24b, 27b ... Standing plate part 23 ... Pulsar ring 24 ... ·········································································· ......・ ・ ・ ・ ・ ・ Inner diameter 25 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Seal members 25a and 25b ・ ・ ・ ・ ・ ・ Side lips 25c and 25d ・ ・ ・ ・ ・ ・· · · Radial lip 26 · · · Elastic lip 27 · · · · Support member 27c · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Sensor 30; ... recess 31 ... O-ring 32 ... Disc-shaped cover 33 ... .... Labyrinth seal 50 ... Wheel bearing device 51 with rotational speed detection device ... Outer member 51a ... Outer rolling surface 51b ... Car body mounting flange 52 ... ... Ball 53 ... Inner member 54 ... Rotational speed detector 55 ... ································ Hub Rings 55a, 56a ······ Inner Rolling Surface 55b .... Inner ring 56b ...・ ・ Small diameter part 56c ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Large diameter part 57 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Wheel mounting flange 58 ・ ・ ・ ・ ・ ・ ・ ・··············································· Outer seal 60 Magnetic sensor 62 ... Sensor holder 63 ... -1st seal ring 64 ... 2nd seal ring 65 ... cored bar 65a ... ······················································································································ Prevent moisture Cylindrical part 65d for inner side Threaded part 66 ... Sealing member 66a ... Slinger side lip 66b, 66c ...・ ・ Radial lip 66d ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Pulsar side lip 67 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Slinger 67a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ Cylindrical part 67b ・ ・ ・ ・ ・ ・ ・ ・ ・ Outward flange part 68 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Pulsar ring 69 ・ ・ ・ ・ ・ ・..... Elastic seal 69a ... Axial lip 70 ... Support member 70a ... ··········· Small diameter cylindrical portion 70b ········································································· 71 ・ ・ ・ ・ ・ ・························································································ ... disk-shaped cover A ... inner diameter Amax of the disk-shaped cover ... ...... Maximum inner diameter Amin of the disc-shaped cover ......... Minimum inner diameter B of the disc-shaped cover ... Shoulder outer diameter C ... Slinger outer diameter D ... Slinger and disk shape Cover axial clearance

Claims (5)

外周に懸架装置に取り付け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、
この内方部材と前記外方部材の両転走面間に転動自在に収容された複列の転動体と、
前記外方部材と内方部材との間に形成される環状空間の開口部に装着されたシールと、
前記外方部材のインナー側の端部に装着され、合成樹脂を射出成形によって形成されて回転速度センサが包埋されたセンサホルダとを備え、
前記シールのうちインナー側のシールが、環状のシール板と、断面略L字状に形成され、前記内輪の外径に圧入されたスリンガ、およびこのスリンガに外嵌され、その外径部に円周方向に関する特性が交互にかつ等間隔に変化する磁気エンコーダが設けられたパルサリングとからなり、前記シール板が、露出した部分が前記外方部材の端部に内嵌され、鋼板からプレス加工によって形成されて前記センサホルダがインサート成形された芯金と、この芯金に一体に接合され、サイドリップとラジアルリップを一体に有するシール部材とからなると共に、
このシール部材のサイドリップが前記スリンガまたはパルサリングあるいは両方に摺接され、前記磁気エンコーダと回転速度センサが径方向すきまを介して対峙された回転速度検出装置付き車輪用軸受装置において、
前記センサホルダのインナー側に円板状カバーが装着され、この円板状のカバーの内径が外側継手部材の肩部と僅かな径方向すきまを介して対峙してラビリンスシールが形成されると共に、円板状カバーの内径をφA、前記外側継手部材の肩部の外径をφB、前記スリンガの外径をφC、前記円板状カバーとスリンガとの軸方向すきまをDとした場合、当該円板状カバーの内径φAが、φB+D≦φA≦φC−Dの範囲に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 mounting to a suspension device on the outer periphery, and an outer rolling surface of a double row integrally formed on the inner periphery;
From 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 housed so as to be freely rollable between both rolling surfaces of the inner member and the outer member;
A seal attached to an opening of an annular space formed between the outer member and the inner member;
A sensor holder mounted on the inner side end of the outer member, formed of synthetic resin by injection molding, and embedded with a rotational speed sensor;
The seal on the inner side of the seal is formed with an annular seal plate, a slinger formed in a substantially L-shaped cross section and press-fitted into the outer diameter of the inner ring, and is fitted onto the slinger, and a circle is formed on the outer diameter portion. It consists of a pulsar ring provided with a magnetic encoder whose characteristics in the circumferential direction change alternately and at equal intervals, and the exposed portion of the seal plate is fitted into the end of the outer member, and is pressed from the steel plate by pressing A core bar formed by insert molding the sensor holder, and a seal member integrally joined to the core bar and integrally including a side lip and a radial lip,
In the wheel bearing device with a rotational speed detection device, the side lip of the seal member is slidably contacted with the slinger or the pulsar ring or both, and the magnetic encoder and the rotational speed sensor are opposed to each other through a radial clearance.
A disc-shaped cover is mounted on the inner side of the sensor holder, and the inner diameter of the disc-shaped cover is opposed to the shoulder portion of the outer joint member through a slight radial clearance to form a labyrinth seal. When the inner diameter of the disc-shaped cover is φA, the outer diameter of the shoulder of the outer joint member is φB, the outer diameter of the slinger is φC, and the axial clearance between the disc-shaped cover and the slinger is D, An inner diameter φA of the plate-like cover is set in a range of φB + D ≦ φA ≦ φC−D.
前記外側継手部材の肩部が前記内輪の大端面に衝合され、前記肩部の外径が前記内輪の外径よりも小径に設定されると共に、前記スリンガに弾性リップが一体に接合され、前記内輪の端面に接している請求項1に記載の回転速度検出装置付き車輪用軸受装置。   The shoulder portion of the outer joint member is abutted against the large end surface of the inner ring, the outer diameter of the shoulder portion is set smaller than the outer diameter of the inner ring, and an elastic lip is integrally joined to the slinger, The wheel bearing device with a rotational speed detection device according to claim 1, which is in contact with an end face of the inner ring. 前記スリンガと円板状カバーが、防錆能を有する鋼板からプレス加工によって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 bearing device for a wheel with a rotation speed detecting device according to claim 1, wherein the slinger and the disc-shaped cover are formed by press working from a steel plate having a rust prevention ability. 前記内輪の外径に小径部と大径部が形成され、前記スリンガが、前記小径部に圧入される円筒部、およびこの円筒部から径方向外方に延びる立板部を有し、前記円筒部に前記パルサリングを構成する支持部材の内径部が圧入固定され、当該支持部材が前記内径部から径方向外方に延びる立板部と、この立板部から軸受内方側に延び、前記大径部よりも僅かに大径に形成された円筒状の外径部を有し、この外径部に前記磁気エンコーダが接合されると共に、前記シール部材のサイドリップが前記スリンガと支持部材の立板部に摺接され、前記ラジアルリップが前記パルサリングの内径部に摺接されている請求項1乃至3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。   A small-diameter portion and a large-diameter portion are formed on the outer diameter of the inner ring, and the slinger has a cylindrical portion that is press-fitted into the small-diameter portion, and a vertical plate portion that extends radially outward from the cylindrical portion. An inner diameter portion of a support member constituting the pulsar ring is press-fitted and fixed to a portion, the support member extends radially outward from the inner diameter portion, and extends from the standing plate portion toward the bearing inward side. A cylindrical outer diameter portion formed slightly larger than the diameter portion, and the magnetic encoder is joined to the outer diameter portion, and the side lip of the seal member is provided between the slinger and the support member. The wheel bearing device with a rotational speed detection device according to any one of claims 1 to 3, wherein the radial lip is slidably contacted with a plate portion, and the radial lip is slidably contacted with an inner diameter portion of the pulsar ring. 前記支持部材が、強磁性体の鋼鈑からプレス加工によって形成されると共に、前記磁気エンコーダが、エラストマに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 support member is formed by pressing a ferromagnetic steel plate, and the magnetic encoder has magnetic powder mixed in an elastomer, and magnetic poles N and S are alternately magnetized in the circumferential direction. Item 5. A wheel bearing device with a rotational speed detection device according to Item 4.
JP2007130149A 2007-05-16 2007-05-16 Wheel bearing device with rotational speed detection device Pending JP2008286268A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2007130149A JP2008286268A (en) 2007-05-16 2007-05-16 Wheel bearing device with rotational speed detection device
PCT/JP2008/001225 WO2008139739A1 (en) 2007-05-16 2008-05-16 Bearing adapted to wheels and having rotational speed sensor
CN2008800162155A CN101688878B (en) 2007-05-16 2008-05-16 Wheel bearing adapted to wheels speed sensor
DE112008001279T DE112008001279T5 (en) 2007-05-16 2008-05-16 Wheel bearing device with built-wheel speed detection device
US12/618,982 US8360649B2 (en) 2007-05-16 2009-11-16 Wheel bearing apparatus incorporated with a wheel speed detecting apparatus

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8764299B2 (en) 2009-10-05 2014-07-01 Ntn Corporation Wheel bearing apparatus incorporated with a rotational speed detecting apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8764299B2 (en) 2009-10-05 2014-07-01 Ntn Corporation Wheel bearing apparatus incorporated with a rotational speed detecting apparatus

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