JP4628395B2 - Wheel bearing device with rotation speed detector - Google Patents

Wheel bearing device with rotation speed detector Download PDF

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Publication number
JP4628395B2
JP4628395B2 JP2007122231A JP2007122231A JP4628395B2 JP 4628395 B2 JP4628395 B2 JP 4628395B2 JP 2007122231 A JP2007122231 A JP 2007122231A JP 2007122231 A JP2007122231 A JP 2007122231A JP 4628395 B2 JP4628395 B2 JP 4628395B2
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seal
rotational speed
cylindrical portion
wheel
encoder
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JP2007211988A (en
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寿志 大槻
和寿 重岡
智海 石河
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NTN Corp
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NTN Corp
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72Sealings
    • F16C33/76Sealings of ball or roller bearings
    • F16C33/78Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7886Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72Sealings
    • F16C33/76Sealings of ball or roller bearings
    • F16C33/80Labyrinth sealings
    • F16C33/805Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007Encoders, e.g. parts with a plurality of alternating magnetic poles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14Bearings 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
    • F16C19/18Bearings 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
    • F16C19/181Bearings 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
    • F16C19/183Bearings 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
    • F16C19/184Bearings 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
    • F16C19/186Bearings 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00Articles relating to transporting
    • F16C2326/01Parts of vehicles in general
    • F16C2326/02Wheel hubs or castors

Description

本発明は、自動車等の車輪を回転自在に支承すると共に、この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に関するものである。   The present invention relates to a wheel bearing device with a rotational speed detection device that rotatably supports a wheel of an automobile or the like and incorporates a rotational speed detection device that detects the rotational speed of the wheel.

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)を制御すべく車輪の回転速度を検出するために、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。   Rotation speed detection device with built-in rotation speed detection device to detect the rotation speed of the wheel to control the anti-lock brake system (ABS) while supporting the wheel of the automobile rotatably with the suspension system Wheel 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5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は、図示しない懸架装置に支持固定され、固定部材となる外方部材51と、この外方部材51に複列の転動体(ボール)53、53を介して内挿された内方部材52とを有し、外方部材51は車体取付フランジ51bを外周に一体に有し、内周には複列の外側転走面51a、51aが形成されている。一方、内方部材52は、前記した外方部材51の外側転走面51a、51aに対向する複列の内側転走面55a、56aが形成されている。これら複列の内側転走面55a、56aのうち一方の内側転走面55aはハブ輪55の外周に一体形成され、他方の内側転走面56aは、ハブ輪55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に圧入された内輪56の外周に形成されている。そして、複列の転動体53、53がこれら両転走面間にそれぞれ収容され、保持器57、57によって転動自在に保持されている。   A structure as shown in FIG. 5 is known as an example of such a wheel bearing device with a rotational speed detection device. This wheel bearing device with a rotational speed detection device is supported and fixed to a suspension device (not shown), an outer member 51 serving as a fixing member, and the outer member 51 via double-row rolling elements (balls) 53 and 53. The outer member 51 has a body mounting flange 51b integrally formed on the outer periphery, and double row outer rolling surfaces 51a and 51a are formed on the inner periphery. . On the other hand, the inner member 52 is formed with double-row inner rolling surfaces 55a and 56a facing the outer rolling surfaces 51a and 51a of the outer member 51 described above. Of these double-row inner rolling surfaces 55a, 56a, one inner rolling surface 55a is integrally formed on the outer periphery of the hub wheel 55, and the other inner rolling surface 56a extends from the inner rolling surface 55a of the hub wheel 55. It is formed on the outer periphery of an inner ring 56 that is press-fitted into a cylindrical small-diameter step portion 55b extending in the axial direction. And the double row rolling elements 53 and 53 are accommodated between these both rolling surfaces, respectively, and are hold | maintained by the holder | retainers 57 and 57 so that rolling is possible.

ハブ輪55は、外周に車輪(図示せず)を取り付けるための車輪取付フランジ54を一体に有し、この車輪取付フランジ54の円周等配位置には車輪を固定するためのハブボルト54aが植設されている。また、ハブ輪55の内周には、図示しない等速自在継手を構成する外側継手部材60のステム部61が内嵌されるセレーション55cが形成されている。内方部材52は、このハブ輪55と内輪56を指す。そして、外方部材51の端部にはシール58、59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。   The hub wheel 55 integrally has a wheel mounting flange 54 for mounting a wheel (not shown) on the outer periphery, and a hub bolt 54 a for fixing the wheel is planted at a circumferentially equidistant position of the wheel mounting flange 54. It is installed. Further, a serration 55c is formed on the inner periphery of the hub wheel 55, in which a stem portion 61 of an outer joint member 60 constituting a constant velocity universal joint (not shown) is fitted. The inner member 52 refers to the hub ring 55 and the inner ring 56. Seals 58 and 59 are attached to the end of the outer member 51 to prevent leakage of lubricating grease sealed inside the bearing and intrusion of rainwater, dust, etc. into the bearing from the outside.

インボード側のシール59は、図6に拡大して示すように、外方部材51の端部内周に内嵌され、断面L字状に形成された第1のシール板62と、この第1のシール板62に対向し、断面L字状に形成された第2のシール板63とからなる。この第2のシール板63は、内輪56に外嵌される円筒部63aと、この円筒部63aから径方向外方に延びる立板部63bとを有し、この立板部63bの外側面には、磁性体粉の混入され、周方向に交互に磁極N、Sが形成されたゴム磁石からなる磁気エンコーダ64が一体に加硫接着されている。   As shown in an enlarged view in FIG. 6, the inboard side seal 59 is fitted into the inner periphery of the end of the outer member 51 and has a first seal plate 62 having an L-shaped cross section, and the first seal plate 62. And a second seal plate 63 having an L-shaped cross section. The second seal plate 63 has a cylindrical portion 63a fitted on the inner ring 56, and a standing plate portion 63b extending radially outward from the cylindrical portion 63a. The second sealing plate 63 is formed on the outer surface of the standing plate portion 63b. A magnetic encoder 64 made of a rubber magnet in which magnetic powder is mixed and magnetic poles N and S are alternately formed in the circumferential direction is integrally vulcanized and bonded.

一方、第1のシール板62は、断面L字状に形成された芯金65と、この芯金65に一体に加硫接着され、前記第2のシール板63における立板部63bの内側面に摺接するサイドリップ66aと、円筒部63aに摺接する一対のラジアルリップ66b、66cとからなるシール部材66とを有している。   On the other hand, the first seal plate 62 is a cored bar 65 having an L-shaped cross section and is integrally vulcanized and bonded to the cored bar 65 so that the inner surface of the upright plate part 63b of the second seal plate 63 is obtained. And a seal member 66 including a pair of radial lips 66b and 66c slidably in contact with the cylindrical portion 63a.

外方部材51の端部には、嵌合筒67と、この嵌合筒67に結合された保持部68とからなる円環状のセンサホルダ69が装着されている。嵌合筒67は、嵌合筒部67aと、この嵌合筒部67aから径方向内方に延びる内向鍔部67bとからなり、断面L字状で全体が円環状に形成されている。   An annular sensor holder 69 including a fitting cylinder 67 and a holding portion 68 coupled to the fitting cylinder 67 is attached to the end of the outer member 51. The fitting tube 67 includes a fitting tube portion 67a and an inward flange portion 67b extending radially inward from the fitting tube portion 67a, and is formed in an annular shape with an L-shaped cross section.

保持部68は、その内部に前記磁気エンコーダ64に所定のエアギャップを介して対峙する回転速度センサ70が包埋され、合成樹脂で円弧状に一体モールド成形されている。回転速度センサ70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。   The holding portion 68 is embedded therein with a rotational speed sensor 70 facing the magnetic encoder 64 via a predetermined air gap, and is integrally molded in a circular arc shape with a synthetic resin. The rotational speed sensor 70 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 the magnetic flux, and a waveform shaping circuit that adjusts the output waveform of the magnetic detecting element. It consists of IC.

ここで、内輪56の端面と嵌合筒67の内向鍔部67bとを微小隙間71を介して全周に亙り近接対向させてラビリンスシールが構成されている。これにより、自動車の完成品メーカの組立ラインへの搬送時を含む、ハブ輪55の内径に外側継手部材60のステム部61を嵌合する以前の状態でも、磁気エンコーダ64と回転速度センサ70の検出部との間に、外部から磁性粉末等の異物が侵入するのを防止できる。したがって、車輪の回転速度検出の信頼性向上を図ることができる。
特開2003−254985号公報
Here, the labyrinth seal is configured by causing the end face of the inner ring 56 and the inward flange portion 67b of the fitting cylinder 67 to closely face each other through the minute gap 71. Thus, the magnetic encoder 64 and the rotational speed sensor 70 can be connected to each other even before the stem portion 61 of the outer joint member 60 is fitted to the inner diameter of the hub wheel 55, including when it is transported to the assembly line of the automobile finished product manufacturer. It is possible to prevent foreign matter such as magnetic powder from entering between the detection unit and the outside. Therefore, it is possible to improve the reliability of wheel rotation speed detection.
JP 2003-254985 A

しかしながら、こうした従来の回転速度検出装置付き車輪用軸受装置は、自動車の完成品メーカの組立ラインへの搬送時を含む、ハブ輪55の内径に外側継手部材60のステム部61を嵌合する以前の状態でも、磁気エンコーダ64と回転速度センサ70の検出部との間に、外部から磁性粉末等の異物が侵入するのを防止できる特徴を具備するも、こうしたラビリンスシールあるいは簡易的な接触シール等では、過酷な環境となる実走時において、磁気エンコーダ64と回転速度センサ70の検出部との間に外部からダストや磁性粉末等の異物が侵入するのは必至である。こうした異物は磁気エンコーダ64を摩耗させると共に、回転速度センサ70の検出部を損傷させ、車輪の回転速度検出の信頼性が低下する恐れがあった。   However, such a conventional wheel bearing device with a rotational speed detection device is used before the stem portion 61 of the outer joint member 60 is fitted to the inner diameter of the hub wheel 55, including during transportation to an assembly line of a finished car manufacturer. Even in this state, the labyrinth seal or the simple contact seal is provided with a feature capable of preventing foreign matter such as magnetic powder from entering between the magnetic encoder 64 and the detection unit of the rotational speed sensor 70. Then, it is inevitable that foreign matter such as dust or magnetic powder enters from the outside between the magnetic encoder 64 and the detection unit of the rotation speed sensor 70 during actual running, which is a severe environment. Such foreign matter may wear the magnetic encoder 64 and damage the detection portion of the rotational speed sensor 70, which may reduce the reliability of detecting the rotational speed of the wheel.

本発明は、このような事情に鑑みてなされたもので、コンパクト化と共に、検出部に異物が侵入するのを防止し、耐久性と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。   SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and has a wheel bearing device with a rotational speed detection device that is compact and prevents foreign matter from entering the detection portion and has improved durability and reliability. The purpose is to provide.

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円筒状の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内側転走面が形成された内方部材と、前記外方部材および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たエンコーダと、このエンコーダに対向するように前記外方部材の端部に装着された円環状のセンサホルダと、このセンサホルダに一体モールドされ、前記エンコーダに所定の軸方向すきまを介して対峙する回転速度センサと、を備えた回転速度検出装置付き車輪用軸受装置において、前記センサホルダが、鋼鈑製の嵌合環と、この嵌合環に前記回転速度センサが一体モールドされた保持部とからなり、前記エンコーダが円環状をなし、その円周方向に関する特性が交互にかつ等間隔に変化するように構成されると共に、このエンコーダのインボード側に前記センサホルダを介してシールが配設され、このシールが前記嵌合環の内周面と前記内輪の外周面にそれぞれ装着され、互いに対向して配置された環状の第1および第2のシール板からなり、前記エンコーダと回転速度センサのインボード側に配設されている構成を採用した。
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 formed on the inner periphery. A hub wheel having an outer member and a wheel mounting flange for mounting a wheel at one end thereof integrally formed with a cylindrical small diameter step portion extending in the axial direction on the outer periphery, and a small diameter step portion of the hub wheel An inner member formed of an inner ring that is press-fitted and formed on the outer periphery with an inner rolling surface facing the outer rolling surface of the double row, and between the respective rolling surfaces of the outer member and the inner member A double row rolling element housed in a freely rollable manner, an encoder fitted on the inner ring, an annular sensor holder mounted on an end of the outer member so as to face the encoder, and The sensor holder is integrally molded, and the encoder has a predetermined axis. In the rotational speed detector equipped wheel support bearing assembly equipped with a rotation speed sensor, a which faces via countercurrent gap, wherein the sensor holder, a fitting ring of steel鈑製, the rotational speed sensor on the fitting ring The encoder has an annular shape, and is configured such that characteristics in the circumferential direction change alternately and at equal intervals, and the sensor holder is provided on the inboard side of the encoder. A seal is disposed through the ring, and the seal is mounted on the inner peripheral surface of the fitting ring and the outer peripheral surface of the inner ring , respectively, and includes annular first and second seal plates disposed opposite to each other. Ri, was adopted a structure that is disposed on the inboard side of the rotational speed sensor and the encoder.

このように、内輪回転タイプの回転速度検出装置付き車輪用軸受装置において、センサホルダが、鋼鈑製の嵌合環と、この嵌合環に回転速度センサが一体モールドされた保持部とからなり、エンコーダが円環状をなし、その円周方向に関する特性が交互にかつ等間隔に変化するように構成されると共に、このエンコーダのインボード側にセンサホルダを介してシールが配設され、このシールが嵌合環の内周面と内輪の外周面にそれぞれ装着され、互いに対向して配置された環状の第1および第2のシール板からなり、エンコーダと回転速度センサのインボード側に配設されているので、エンコーダと回転速度センサの検出部がセンサホルダと強固なシールとによって外部から遮断され、自動車の完成品メーカの組立ラインへの搬送時を含む、ハブ輪に外側継手部材を内嵌する以前の状態でも、また、過酷な環境となる実走時においても、エンコーダと回転速度センサの検出部との間に、外部から磁性粉末等の異物が侵入するのを確実に防止することができる。したがって、車輪の回転速度検出の信頼性を格段に向上させることができる。
As described above, in the wheel bearing device with a rotation speed detection device of the inner ring rotation type, the sensor holder includes a steel ring fitting ring and a holding portion in which the rotation speed sensor is integrally molded with the fitting ring. The encoder has an annular shape, and the characteristic in the circumferential direction changes alternately and at equal intervals, and a seal is disposed on the inboard side of the encoder via a sensor holder. distribution but each is mounted on the inner and outer peripheral surfaces of the inner ring of the annular fitting member, Ri Do from the first and second sealing plate of ring disposed opposite to each other, the inboard side of the encoder and the rotational speed sensor set which do Runode, detector of the encoder and the rotational speed sensor is blocked from the outside by a strong seal and the sensor holder includes at transportation to a finished product manufacturers assembly line of the automobile, Even before the outer joint member is fitted into the ring, or during actual running, which is a harsh environment, foreign matter such as magnetic powder enters between the encoder and the detection unit of the rotation speed sensor. Can be surely prevented. Therefore, the reliability of wheel rotation speed detection can be significantly improved.

好ましくは、請求項2に記載の発明のように、記嵌合環が、前記外方部材の外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、前記外方部材の端面に密着される鍔部と、この鍔部から軸方向に延びる円筒部とからなり、この円筒部に前記第1のシール板が内嵌されていれば、径方向のコンパクト化ができると共に、回転速度センサ等の取り巻きを簡素化でき、組立作業性が一段と向上する。
Preferably, as in the invention of claim 2, before Symbol fitting ring comprises a cylindrical fitting portion which is press-fitted into the outer periphery of the outer member extends from the fitting portion radially inward and said outer flange portion on the end face Ru in close contact members consists of a rolled buildings cylindrical portion from the flange portion in the axial direction, if it is fitted the first seal plate inner to the cylindrical portion, radially As well as simplification of the surroundings of the rotation speed sensor and the like, further improving the assembly workability.

また、請求項3に記載の発明は、前記第2のシール板が、前記内輪に外嵌された円筒部と、この円筒部から径方向外方に延びる立板部と、この立板部から軸方向に突設された舌片とを有、この舌片を前記センサホルダに僅かな径方向すきまを介して対向させてラビリンスシールが構成されているので、一層密封性が向上し、回転速度検出の信頼性を向上させることができる。
According to a third aspect of the present invention, the second seal plate includes a cylindrical portion that is externally fitted to the inner ring, a vertical plate portion that extends radially outward from the cylindrical portion, and the vertical plate portion. possess a tongue which projects axially from, since the tongue piece are opposed to each other via a slight radial gap in the sensor holder labyrinth seal is configured, improves further the sealing property, The reliability of rotation speed detection can be improved.

また、請求項4に記載の発明は、前記シールのさらにインボード側に断面略コの字状のシールドが配設され、このシールドを前記内方部材に僅かなすきまを介して対向させてラビリンスシールが構成されるので、実走時において一層密封性が向上する。
Further, an invention according to claim 4, wherein the further shaped shield section substantially U inboard of the seal is disposed, the shield is opposed through the KOR slightly formed on the inner member and the labyrinth Since the seal is configured, the sealing performance is further improved during actual running.

また、前記シールドは、請求項5に記載の発明のように、前記センサホルダに内嵌される第1円筒部と、この第1円筒部から径方向内方に延びる立板部と、この立板部から軸方向に延びる第2円筒部とからなり、前記立板部を前記第2のシール板に僅かな軸方向すきまを介して対向させてラビリンスシールが構成されていても良いし、また、請求項6に記載の発明のように、前記センサホルダに内嵌される第1円筒部と、この第1円筒部から径方向内方に延びる立板部と、この立板部から軸方向に延びる第2円筒部とからなり、前記第2円筒部を前記内輪の端面に僅かな軸方向すきまを介して対向させてラビリンスシールが構成されていても良い。   The shield includes a first cylindrical portion fitted into the sensor holder, a standing plate portion extending radially inward from the first cylindrical portion, and The labyrinth seal may be configured by a second cylindrical portion extending in the axial direction from the plate portion, with the upright plate portion facing the second seal plate via a slight axial clearance, and As in the invention described in claim 6, a first cylindrical portion fitted into the sensor holder, a standing plate portion extending radially inward from the first cylindrical portion, and an axial direction from the standing plate portion The labyrinth seal may be configured such that the second cylindrical portion extends to the end face of the inner ring with a slight axial clearance therebetween.

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円筒状の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内側転走面が形成された内方部材と、前記外方部材および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たエンコーダと、このエンコーダに対向するように前記外方部材の端部に装着された円環状のセンサホルダと、このセンサホルダに一体モールドされ、前記エンコーダに所定の軸方向すきまを介して対峙する回転速度センサと、を備えた回転速度検出装置付き車輪用軸受装置において、前記センサホルダが、鋼鈑製の嵌合環と、この嵌合環に前記回転速度センサが一体モールドされた保持部とからなり、前記エンコーダが円環状をなし、その円周方向に関する特性が交互にかつ等間隔に変化するように構成されると共に、このエンコーダのインボード側に前記センサホルダを介してシールが配設され、このシールが前記嵌合環の内周面と前記内輪の外周面にそれぞれ装着され、互いに対向して配置された環状の第1および第2のシール板からなり、前記エンコーダと回転速度センサのインボード側に配設されているので、エンコーダと回転速度センサの検出部がセンサホルダと強固なシールとによって外部から遮断され、自動車の完成品メーカの組立ラインへの搬送時を含む、ハブ輪に外側継手部材を内嵌する以前の状態でも、また、過酷な環境となる実走時においても、エンコーダと回転速度センサの検出部との間に、外部から磁性粉末等の異物が侵入するのを確実に防止することができる。したがって、車輪の回転速度検出の信頼性を格段に向上させることができる。
A wheel bearing device with a rotational speed detection device according to the present invention has a vehicle body mounting flange integrally attached to a suspension device on the outer periphery, and an outer member having a double row outer raceway formed on the inner periphery. , A hub wheel integrally having a wheel mounting flange for mounting a wheel at one end thereof, and having a cylindrical small diameter step portion extending in the axial direction on the outer periphery, and an inner ring press-fitted into the small diameter step portion of the hub ring An inner member in which an inner rolling surface facing the outer rolling surface of the double row is formed on the outer periphery, and freely rollable between the rolling surfaces of the outer member and the inner member. An accommodated double row rolling element, an encoder fitted on the inner ring, an annular sensor holder mounted on the end of the outer member so as to face the encoder, and an integral part of the sensor holder Molded and the encoder has a predetermined axial direction. A rotation speed sensor, the rotation speed detector equipped wheel support bearing assembly provided with the sensor holder, a fitting ring of steel鈑製, the rotational speed sensor on the fitting ring integral to confront through or The encoder has an annular shape, and is configured such that the characteristic in the circumferential direction changes alternately and at equal intervals, and the sensor holder is provided on the inboard side of the encoder. a seal is disposed over, the seal is respectively mounted on the outer peripheral surface of the inner ring and the inner peripheral surface of the fitting ring, Ri Do from the first and second sealing plate of ring disposed opposite to each other the encoder and the rotational speed sensor Runode are disposed on the inboard side, the detecting unit of the encoder and the rotational speed sensor is blocked from the outside by a strong seal and the sensor holder, automatic Even when the outer joint member is fitted inside the hub wheel, including when it is transported to the assembly line of the finished product manufacturer, and in the actual running that is a harsh environment, the encoder and the detector of the rotational speed sensor In the meantime, it is possible to reliably prevent foreign substances such as magnetic powder from entering from the outside. Therefore, the reliability of wheel rotation speed detection can be significantly improved.

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に対向する一方の内側転走面と、この内側転走面から軸方向に延びる円筒状の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、前記複列の外側転走面に対向する他方の内側転走面が形成された内輪とからなる内方部材と、前記外方部材および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たエンコーダと、このエンコーダに対向するように前記外方部材の端部に装着された円環状のセンサホルダと、このセンサホルダに一体モールドされ、前記エンコーダに所定の軸方向すきまを介して対峙する回転速度センサとを備えた回転速度検出装置付き車輪用軸受装置において、前記センサホルダが、鋼鈑製の嵌合環と、この嵌合環に前記回転速度センサが一体モールドされた保持部とからなり、前記エンコーダが円環状をなし、磁性体粉が混入されて周方向に交互に磁極N、Sが着磁された磁気エンコーダからなると共に、この磁気エンコーダのインボード側に前記センサホルダを介してシールが配設され、このシールが前記嵌合環の内周面と前記内輪の外周面にそれぞれ装着され、互いに対向して配置された環状の第1および第2のシール板からなり、前記エンコーダと回転速度センサのインボード側に配設されている。 A vehicle body mounting flange for mounting to a suspension device on the outer periphery is integrated, an outer member having a double row outer rolling surface formed on the inner periphery, and a wheel mounting flange for mounting a wheel on one end is integrated. A hub wheel having one inner rolling surface facing the outer rolling surface of the double row on the outer periphery, and a cylindrical small diameter step portion extending in an axial direction from the inner rolling surface, and the hub An inner member comprising an inner ring press-fitted into a small-diameter step portion of the ring and formed with the other inner rolling surface facing the outer rolling surface of the double row, and each of the outer member and the inner member A double row rolling element accommodated between the rolling surfaces so as to roll freely, an encoder externally fitted to the inner ring, and an annular shape mounted on the end of the outer member so as to face the encoder A sensor holder and the encoder that is integrally molded with the sensor holder In the rotational speed detector equipped wheel support bearing assembly equipped with a rotation speed sensor which faces via a predetermined axial gap, wherein the sensor holder, a fitting ring of steel鈑製, the rotational speed to the fitting ring The sensor comprises an integrally molded holding part, and the encoder has an annular shape, and is composed of a magnetic encoder in which magnetic powder is mixed and magnetic poles N and S are alternately magnetized in the circumferential direction. A seal is disposed on the inboard side via the sensor holder, and the seals are respectively attached to the inner peripheral surface of the fitting ring and the outer peripheral surface of the inner ring , and are arranged in an annular first manner disposed opposite to each other. and Ri Do the second sealing plate, that is disposed on the inboard side of the rotational speed sensor and the encoder.

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第1の実施形態を示す縦断面図、図2は、図1の要部拡大図である。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トボード側(図面左側)、中央寄り側をインボード側(図面右側)という。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device with a rotational speed detection device according to the present invention, and FIG. 2 is an enlarged view of a main part of FIG. In the following description, the side closer to the outer side of the vehicle when assembled to the vehicle is referred to as the outboard side (left side in the drawing), and the side closer to the center is referred to as the inboard 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であって、ハブ輪1と複列の転がり軸受2とをユニット化した、所謂第3世代と称される構成を備えている。
複列の転がり軸受2は、外方部材4と内方部材3と複列の転動体(ボール)5、5とを有し、外方部材4は、S53C等の炭素0.40〜0.80wt%を含む中炭素鋼からなり、外周にナックルNに取り付けるための車体取付フランジ4bを一体に有している。内周には複列の外側転走面4a、4aが形成され、高周波焼入れによって表面硬さを54〜64HRCの範囲に硬化層が形成されている。
This wheel bearing device with a rotational speed detection device is for a drive wheel and has a so-called third generation configuration in which the hub wheel 1 and the double row rolling bearing 2 are unitized.
The double-row rolling bearing 2 includes an outer member 4, an inner member 3, and double-row rolling elements (balls) 5 and 5, and the outer member 4 has carbon 0.40 to 0. It is made of medium carbon steel containing 80 wt%, and integrally has a vehicle body mounting flange 4b for mounting to the knuckle N on the outer periphery. Double rows of outer rolling surfaces 4a and 4a are formed on the inner periphery, and a hardened layer is formed with a surface hardness in the range of 54 to 64 HRC by induction hardening.

一方、ハブ輪1は、アウトボード側の端部に車輪(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、この車輪取付フランジ7の円周等配位置にハブボルト7aが植設されている。また、外周には前記複列の外側転走面4a、4aに対向する一方の内側転走面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が形成されている。そして、この小径段部1bの端部を径方向外方に塑性変形させて加締部8が形成されている。内輪6はこの小径段部1bに圧入され、その外周に前記複列の外側転走面4a、4aに対向する他方の内側転走面6aが形成されている。また、加締部8によって内輪6はハブ輪1に対して軸方向に固定され、所謂セルフリテイン構造をなしている。これにより、従来のようにナット等で強固に緊締して予圧量を管理する必要がないため、軽量・コンパクト化を図ることができると共に、ハブ輪1の強度・耐久性を向上させ、かつ長期間その予圧量を維持することができる。ここで、内方部材3は、ハブ輪1と、このハブ輪1に圧入された内輪6を指している。   On the other hand, the hub wheel 1 integrally has a wheel mounting flange 7 for mounting a wheel (not shown) at an end portion on the outboard side, and a hub bolt 7a is planted at a circumferentially equidistant position of the wheel mounting flange 7. It is installed. Further, on the outer periphery, one inner rolling surface 1a facing the double row outer rolling surfaces 4a, 4a and a cylindrical small-diameter step portion 1b extending in the axial direction from the inner rolling surface 1a are formed. Yes. And the crimping part 8 is formed by carrying out the plastic deformation of the edge part of this small diameter step part 1b to radial direction outward. The inner ring 6 is press-fitted into the small-diameter step portion 1b, and the other inner rolling surface 6a facing the double-row outer rolling surfaces 4a and 4a is formed on the outer periphery thereof. Further, the inner ring 6 is fixed in the axial direction with respect to the hub wheel 1 by the caulking portion 8 to form a so-called self-retain structure. As a result, it is not necessary to control the preload by tightening firmly with a nut or the like as in the prior art, so that the weight and size can be reduced and the strength and durability of the hub wheel 1 can be improved and long. The amount of preload can be maintained for a period. Here, the inner member 3 refers to the hub wheel 1 and the inner ring 6 press-fitted into the hub wheel 1.

外方部材4の外側転走面4a、4aと、これらに対向する複列の内側転走面1a、6a間には複列の転動体5、5がそれぞれ収容され、保持器9、9によって転動自在に保持されている。また、外方部材4の端部にはシール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。   Double row rolling elements 5, 5 are accommodated between outer rolling surfaces 4a, 4a of outer member 4 and double row inner rolling surfaces 1a, 6a facing these, respectively, by retainers 9, 9. It is held freely rolling. Further, seals 10 and 11 are attached to the end portion of the outer member 4 to prevent leakage of the lubricating grease sealed inside the bearing and intrusion of rainwater, dust and the like into the bearing from the outside.

ハブ輪1は、S53C等の炭素0.40〜0.80wt%を含む中炭素鋼からなり、アウトボード側のシール10が摺接するシールランド部から内側転走面1aおよび小径段部1bに亙って高周波焼入れによって表面硬さを54〜64HRCの範囲に硬化層が形成されている。なお、加締部8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。これにより、車輪取付フランジ7の基部となるシールランド部は耐摩耗性が向上するばかりでなく、車輪取付フランジ7に負荷される回転曲げ荷重に対して充分な機械的強度を有し、ハブ輪1の耐久性が一層向上する。また、加締部8を塑性変形させる時の加工性が向上すると共に、加工時におけるクラック等の発生を防止してその品質の信頼性が向上する。   The hub wheel 1 is made of medium carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and the like from the seal land portion where the seal 10 on the outboard side is slidably contacted to the inner rolling surface 1a and the small diameter step portion 1b. Thus, a hardened layer is formed with a surface hardness in the range of 54 to 64 HRC by induction hardening. Note that the caulking portion 8 is an unquenched portion having a material surface hardness of 25 HRC or less after forging. As a result, the seal land that is the base of the wheel mounting flange 7 not only has improved wear resistance, but also has sufficient mechanical strength against the rotational bending load applied to the wheel mounting flange 7. The durability of 1 is further improved. In addition, the workability when plastically deforming the caulking portion 8 is improved, and the occurrence of cracks and the like during processing is prevented, and the reliability of the quality is improved.

ハブ輪1の内周にはセレーション(またはスプライン)1cが形成され、等速自在継手を構成する外側継手部材12がセレーション1cを介して内嵌されている。そして、外側継手部材12は、その肩部13が前記ハブ輪1の加締部8に突き合わされ、固定ナット14によってハブ輪1と軸方向に一体固定されている。   A serration (or spline) 1c is formed on the inner periphery of the hub wheel 1, and an outer joint member 12 constituting a constant velocity universal joint is fitted through the serration 1c. The shoulder portion 13 of the outer joint member 12 is abutted against the caulking portion 8 of the hub wheel 1 and is fixed integrally with the hub wheel 1 in the axial direction by a fixing nut 14.

本実施形態では、図2に拡大して示すように、円環状に形成されたセンサホルダ15は外方部材4の端部に装着され、嵌合環16と、この嵌合環16に結合された保持部17とからなる。嵌合環16は、外方部材4の外周に圧入される円筒状の嵌合部16aと、この嵌合部16aから径方向内方に延びる鍔部16bと、この鍔部16bから軸方向に延びる円筒部16cとからなり、全体が円環状に形成されている。この嵌合環16は、耐食性を有するステンレス鋼板等をプレス加工にて形成されている。また、この円筒部16cの周方向複数箇所には穿孔18が形成され、保持部17が合成樹脂で一体モールド成形されている。そして、シール11がセンサホルダ15の円筒部16cに内嵌されると共に、鍔部16bを外方部材4の端面に密着させた状態で、センサホルダ15が外方部材4の端部に圧入固定されている。   In the present embodiment, as shown in an enlarged view in FIG. 2, the sensor holder 15 formed in an annular shape is attached to the end of the outer member 4, and is coupled to the fitting ring 16 and the fitting ring 16. And holding part 17. The fitting ring 16 includes a cylindrical fitting portion 16a that is press-fitted into the outer periphery of the outer member 4, a flange portion 16b that extends radially inward from the fitting portion 16a, and an axial direction from the flange portion 16b. The cylindrical portion 16c extends, and the whole is formed in an annular shape. The fitting ring 16 is formed by pressing a corrosion-resistant stainless steel plate or the like. Further, perforations 18 are formed at a plurality of locations in the circumferential direction of the cylindrical portion 16c, and the holding portion 17 is integrally molded with a synthetic resin. The sensor holder 15 is press-fitted and fixed to the end portion of the outer member 4 while the seal 11 is fitted into the cylindrical portion 16 c of the sensor holder 15 and the flange portion 16 b is in close contact with the end surface of the outer member 4. Has been.

保持部17には、その内部に後述する磁気エンコーダ19に所定の軸方向すきまを介して対峙する回転速度センサ20が包埋されている。回転速度センサ20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。   A rotation speed sensor 20 is embedded in the holding portion 17 so as to face a magnetic encoder 19 described later via a predetermined axial clearance. The rotation speed sensor 20 incorporates a magnetic detecting element such as a Hall element, a magnetoresistive element (MR element), etc. that changes its characteristics according to the flow direction of magnetic flux, and a waveform shaping circuit that adjusts the output waveform of the magnetic detecting element. It consists of IC.

インボードが側のシール11は、センサホルダ15と内輪6にそれぞれ装着され、断面略L字状に形成された環状の第1および第2のシール板21、22からなり、互いに対向して配置されている。第2のシール板22は、内輪6に外嵌される円筒部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。この立板部22bの先端部には環状の舌片22cが軸方向に突設され、センサホルダ15の円筒部16cと僅かな径方向すきまを介して対向してラビリンスシール23が構成されている。なお、第2のシール板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ている。   The inboard side seal 11 is mounted on the sensor holder 15 and the inner ring 6 respectively, and is composed of annular first and second seal plates 21 and 22 having a substantially L-shaped cross section, and they are arranged facing each other. Has been. The second seal plate 22 includes a cylindrical portion 22a that is externally fitted to the inner ring 6, and a standing plate portion 22b that extends radially outward from the cylindrical portion 22a. An annular tongue piece 22c is projected in the axial direction at the tip of the upright plate portion 22b, and a labyrinth seal 23 is configured to face the cylindrical portion 16c of the sensor holder 15 with a slight radial clearance. . The second seal plate 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). Has been.

一方、第1のシール板21は、センサホルダ15に内嵌される円筒部21aと、この円筒部21aの一端から径方向内方に延びる立板部21bとからなり、サイドリップ24aとグリースリップ24bおよび中間リップ24cとを一体に有するシール部材24が加硫接着されている。このシール部材24はゴム等の弾性部材からなる。   On the other hand, the first seal plate 21 includes a cylindrical portion 21a fitted in the sensor holder 15 and a standing plate portion 21b extending radially inward from one end of the cylindrical portion 21a. A seal member 24 integrally having 24b and an intermediate lip 24c is vulcanized and bonded. The seal member 24 is made of an elastic member such as rubber.

ここで、サイドリップ24aは第2のシール板22の立板部22bに摺接し、また、グリースリップ24bおよび中間リップ24cは第2のシール板22の円筒部22aに摺接している。また、センサホルダ15の保持部17を挟んでシール11の反対側には鋼板製のベース25が配設されている。このベース25は、内輪6に外嵌される円筒部25aと、この円筒部25aから径方向外方に延びる立板部25bからなり、断面略L字状に形成されている。そして、この立板部25bのインボード側の面には、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磁気エンコーダ19が一体に加硫接着されている。この磁気エンコーダ19は、周方向に交互に磁極N、Sが着磁され、車輪回転速度の検出用のロータリエンコーダを構成している。   Here, the side lip 24 a is in sliding contact with the upright plate portion 22 b of the second seal plate 22, and the grease lip 24 b and the intermediate lip 24 c are in sliding contact with the cylindrical portion 22 a of the second seal plate 22. Further, a steel plate base 25 is disposed on the opposite side of the seal 11 with the holding portion 17 of the sensor holder 15 interposed therebetween. The base 25 includes a cylindrical portion 25a that is externally fitted to the inner ring 6, and a standing plate portion 25b that extends radially outward from the cylindrical portion 25a, and has a substantially L-shaped cross section. A magnetic encoder 19 in which a magnetic powder such as ferrite is mixed in an elastomer such as rubber is integrally vulcanized and bonded to the surface on the inboard side of the standing plate portion 25b. This magnetic encoder 19 is magnetized with magnetic poles N and S alternately in the circumferential direction, and constitutes a rotary encoder for detecting wheel rotation speed.

このように、本実施形態では、円環状のセンサホルダ15に回転速度センサ20が配設され、この回転速度センサ20のインボード側にシール11が内嵌されると共に、さらに、このシール11のインボード側にラビリンスシール23が構成されているので、自動車の完成品メーカの組立ラインへの搬送時を含む、ハブ輪1に外側継手部材12を内嵌する以前の状態でも、また、過酷な環境となる実走時においても、磁気エンコーダ19と回転速度センサ20の検出部との間に外部から磁性粉末等の異物が侵入するのを確実に防止することができる。したがって、車輪の回転速度検出の信頼性を格段に向上させることができる。また、径方向のコンパクト化ができると共に、回転速度センサ20等の取り巻きを簡素化でき、組立作業性が一段と向上する。   Thus, in the present embodiment, the rotational speed sensor 20 is disposed in the annular sensor holder 15, and the seal 11 is fitted on the inboard side of the rotational speed sensor 20, and further, the seal 11 Since the labyrinth seal 23 is configured on the inboard side, even in a state before the outer joint member 12 is internally fitted to the hub wheel 1 including when being transported to the assembly line of a finished automobile manufacturer, Even during actual running as an environment, foreign matter such as magnetic powder can be reliably prevented from entering between the magnetic encoder 19 and the detection unit of the rotation speed sensor 20 from the outside. Therefore, the reliability of detecting the rotational speed of the wheel can be significantly improved. In addition, the radial direction can be reduced, the surroundings of the rotation speed sensor 20 and the like can be simplified, and the assembly workability is further improved.

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19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20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、磁気エンコーダと、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 19 and the rotational speed sensor 20 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 composed of a magnetic encoder, a magnet, and an annular coil wound around.

図3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第2の実施形態を示す要部拡大図である。なお、この実施形態は、前述した実施形態とラビリンスシールの構成が異なるのみで、その他同一部位、同一部品、あるいは同一の機能を有する部位には同じ符号を付けてその詳細な説明を省略する。   FIG. 3 is an enlarged view of a main part showing a second embodiment of the wheel bearing device with a rotation speed detection device according to the present invention. In this embodiment, only the configuration of the labyrinth seal is different from that of the above-described embodiment, and other parts that are the same, the same parts, or the same function are denoted by the same reference numerals and detailed description thereof is omitted.

インボードが側のシール11’は、外方部材4と内輪6にそれぞれ装着され、断面略L字状に形成された環状の第1および第2のシール板21、22’からなり、互いに対向して配置されている。第2のシール板22’は、内輪6に外嵌される円筒部22aと、この円筒部22aから径方向外方に延びる立板部22bとからなる。この立板部22bと第1のシール板21の円筒部21aは僅かな径方向すきまを介して対峙し、ラビリンスシール26が構成されている。   The inboard side seal 11 ′ is mounted on the outer member 4 and the inner ring 6, and includes annular first and second seal plates 21, 22 ′ having a substantially L-shaped cross section and facing each other. Are arranged. The second seal plate 22 ′ includes a cylindrical portion 22 a that is externally fitted to the inner ring 6, and a standing plate portion 22 b that extends radially outward from the cylindrical portion 22 a. The upright plate portion 22b and the cylindrical portion 21a of the first seal plate 21 are opposed to each other through a slight radial clearance to form a labyrinth seal 26.

ここで、シール11’のさらにインボード側にはシールド27が配設されている。このシールド27は、センサホルダ15に内嵌される第1円筒部27aと、この第1円筒部27aから径方向内方に延びる立板部27bと、この立板部27bから軸方向に延びる第2円筒部27cとからなり、断面が略コの字状に形成されている。そして、この立板部27bと前記第2のシール板22’の立板部22bは僅かな軸方向すきまを介して対向してラビリンスシール28が構成されている。さらに、このシールド27の第2円筒部27cと外側継手部材12の肩部13は僅かな径方向すきまを介して対向してラビリンスシール29が構成されている。   Here, a shield 27 is disposed further on the inboard side of the seal 11 ′. The shield 27 includes a first cylindrical portion 27a fitted in the sensor holder 15, a standing plate portion 27b extending radially inward from the first cylindrical portion 27a, and a first plate portion 27b extending in the axial direction from the standing plate portion 27b. It consists of two cylindrical portions 27c, and has a substantially U-shaped cross section. The standing plate portion 27b and the standing plate portion 22b of the second seal plate 22 'are opposed to each other with a slight axial clearance to form a labyrinth seal 28. Further, the second cylindrical portion 27c of the shield 27 and the shoulder portion 13 of the outer joint member 12 are opposed to each other through a slight radial clearance to form a labyrinth seal 29.

このように、本実施形態では、シール11’のインボード側にシールド27が配設されると共に、シール11’のラビリンスシール26に加え、両者間にラビリンスシール28およびシールド27と外側継手部材12の肩部13の間にラビリンスシール29がそれぞれ構成されているので、自動車の完成品メーカの組立ラインへの搬送時を含む、ハブ輪1に外側継手部材12を内嵌する以前の状態でも、また、過酷な環境となる実走時においても、磁気エンコーダ19と回転速度センサ20の検出部との間に、外部から磁性粉末等の異物が侵入するのを確実に防止することができる。   Thus, in this embodiment, the shield 27 is disposed on the inboard side of the seal 11 ′, and in addition to the labyrinth seal 26 of the seal 11 ′, the labyrinth seal 28, the shield 27, and the outer joint member 12 are interposed therebetween. Since the labyrinth seals 29 are respectively configured between the shoulder portions 13, even in a state before the outer joint member 12 is internally fitted to the hub wheel 1, including when being transported to the assembly line of the automobile finished product manufacturer, Further, even during actual running, which is a harsh environment, foreign matter such as magnetic powder can be reliably prevented from entering between the magnetic encoder 19 and the detection unit of the rotation speed sensor 20 from the outside.

図4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第3の実施形態を示す要部拡大図である。なお、この実施形態は、前述した実施形態(図3)の変形例で、シールドの形状が異なるのみで、その他同一部位、同一部品、あるいは同一の機能を有する部位には同じ符号を付けてその詳細な説明を省略する。   FIG. 4 is an enlarged view of a main part showing a third embodiment of a wheel bearing device with a rotational speed detection device according to the present invention. This embodiment is a modification of the above-described embodiment (FIG. 3), except that the shape of the shield is different, and other parts having the same function, the same parts, or the same function are denoted by the same reference numerals. Detailed description is omitted.

シール11’のさらにインボード側にはシールド30が配設されている。このシールド30は、センサホルダ15に内嵌される第1円筒部30aと、この第1円筒部30aから径方向内方に延びる立板部30bと、この立板部30bから軸方向に延びる第2円筒部30cとからなり、断面が略コの字状に形成されている。そして、このシールド30の第2円筒部30cと外側継手部材12の肩部13および内輪6の端面は僅かなすきまを介して対向し、それぞれラビリンスシール29、31が構成されている。   A shield 30 is disposed further on the inboard side of the seal 11 '. The shield 30 includes a first cylindrical portion 30a fitted in the sensor holder 15, a standing plate portion 30b extending radially inward from the first cylindrical portion 30a, and a first plate portion 30b extending in the axial direction from the standing plate portion 30b. It consists of two cylindrical portions 30c and has a substantially U-shaped cross section. And the 2nd cylindrical part 30c of this shield 30, the shoulder part 13 of the outer joint member 12, and the end surface of the inner ring | wheel 6 oppose through a slight clearance, and the labyrinth seals 29 and 31 are comprised, respectively.

このように、本実施形態では、シール11’のインボード側にシールド30が配設されると共に、シール11’のラビリンスシール26に加え、シールド30と外側継手部材12の肩部13および内輪6の端面との間にラビリンスシール29、31がそれぞれ構成されているので、自動車の完成品メーカの組立ラインへの搬送時を含む、ハブ輪1に外側継手部材12を内嵌する以前の状態でも、また、過酷な環境となる実走時においても、磁気エンコーダ19と回転速度センサ20の検出部との間に、外部から磁性粉末等の異物が侵入するのを確実に防止することができる。   Thus, in the present embodiment, the shield 30 is disposed on the inboard side of the seal 11 ′, and in addition to the labyrinth seal 26 of the seal 11 ′, the shield 30 and the shoulder 13 of the outer joint member 12 and the inner ring 6 are provided. Since the labyrinth seals 29 and 31 are respectively formed between the end surface of the hub wheel 1 and the outer joint member 12 before being fitted into the hub wheel 1, including when transported to the assembly line of the finished vehicle manufacturer. Moreover, even during actual running, which is a harsh environment, foreign matter such as magnetic powder can be reliably prevented from entering between the magnetic encoder 19 and the detection unit of the rotation speed sensor 20 from the outside.

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. 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、内輪回転構造において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 is built in the inner ring rotation structure.

本発明に係る車輪用軸受装置の第1の実施形態を示す縦断面図である。It is a longitudinal section showing a 1st embodiment of a bearing device for wheels concerning the present invention. 同上、要部拡大図である。It is a principal part enlarged view same as the above. 本発明に係る車輪用軸受装置の第2の実施形態を示す要部拡大図である。It is a principal part enlarged view which shows 2nd Embodiment of the wheel bearing apparatus which concerns on this invention. 本発明に係る車輪用軸受装置の第3の実施形態を示す要部拡大図である。It is a principal part enlarged view which shows 3rd Embodiment of the wheel bearing apparatus which concerns on this invention. 従来の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. 同上、要部拡大図である。It is a principal part enlarged view same as the above.

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・・・・・・・・・・・・・・・・・・・セレーション
2・・・・・・・・・・・・・・・・・・・・複列の転がり軸受
3・・・・・・・・・・・・・・・・・・・・内方部材
4・・・・・・・・・・・・・・・・・・・・外方部材
4a・・・・・・・・・・・・・・・・・・・外側転走面
4b・・・・・・・・・・・・・・・・・・・車体取付フランジ
5・・・・・・・・・・・・・・・・・・・・転動体
6・・・・・・・・・・・・・・・・・・・・内輪
7・・・・・・・・・・・・・・・・・・・・車輪取付フランジ
7a・・・・・・・・・・・・・・・・・・・ハブボルト
8・・・・・・・・・・・・・・・・・・・・加締部
9・・・・・・・・・・・・・・・・・・・・保持器
10・・・・・・・・・・・・・・・・・・・アウトボード側のシール
11、11’・・・・・・・・・・・・・・・・インボード側のシール
12・・・・・・・・・・・・・・・・・・・外側継手部材
13・・・・・・・・・・・・・・・・・・・肩部
14・・・・・・・・・・・・・・・・・・・固定ナット
15・・・・・・・・・・・・・・・・・・・センサホルダ
16・・・・・・・・・・・・・・・・・・・嵌合環
16a・・・・・・・・・・・・・・・・・・嵌合部
16b・・・・・・・・・・・・・・・・・・鍔部
16c、21a、22a、25a・・・・・・円筒部
17・・・・・・・・・・・・・・・・・・・保持部
18・・・・・・・・・・・・・・・・・・・穿孔
19・・・・・・・・・・・・・・・・・・・磁気エンコーダ
20・・・・・・・・・・・・・・・・・・・回転速度センサ
21・・・・・・・・・・・・・・・・・・・第1のシール板
21b、22b、25b、27b、30b・・立板部
22、22’・・・・・・・・・・・・・・・・第2のシール板
22c・・・・・・・・・・・・・・・・・・舌片
23、26、28、29、31・・・・・・・ラビリンスシール
24・・・・・・・・・・・・・・・・・・・シール部材
24a・・・・・・・・・・・・・・・・・・サイドリップ
24b・・・・・・・・・・・・・・・・・・グリースリップ
24c・・・・・・・・・・・・・・・・・・中間リップ
25・・・・・・・・・・・・・・・・・・・ベース
27、30・・・・・・・・・・・・・・・・シールド
27a、30a・・・・・・・・・・・・・・第1円筒部
27c、30c・・・・・・・・・・・・・・第2円筒部
51・・・・・・・・・・・・・・・・・・・外方部材
51a・・・・・・・・・・・・・・・・・・外側転走面
51b・・・・・・・・・・・・・・・・・・車体取付フランジ
52・・・・・・・・・・・・・・・・・・・内方部材
53・・・・・・・・・・・・・・・・・・・転動体
54・・・・・・・・・・・・・・・・・・・車輪取付フランジ
54a・・・・・・・・・・・・・・・・・・ハブボルト
55・・・・・・・・・・・・・・・・・・・ハブ輪
55a、56a・・・・・・・・・・・・・・内側転走面
55b・・・・・・・・・・・・・・・・・・小径段部
55c・・・・・・・・・・・・・・・・・・セレーション
56・・・・・・・・・・・・・・・・・・・内輪
57・・・・・・・・・・・・・・・・・・・保持器
58、59・・・・・・・・・・・・・・・・シール
60・・・・・・・・・・・・・・・・・・・外側継手部材
61・・・・・・・・・・・・・・・・・・・ステム部
62・・・・・・・・・・・・・・・・・・・第1のシール板
63・・・・・・・・・・・・・・・・・・・第2のシール板
63a・・・・・・・・・・・・・・・・・・円筒部
63b・・・・・・・・・・・・・・・・・・立板部
64・・・・・・・・・・・・・・・・・・・磁気エンコーダ
65・・・・・・・・・・・・・・・・・・・芯金
66・・・・・・・・・・・・・・・・・・・シール部材
66a・・・・・・・・・・・・・・・・・・サイドリップ
66b、66c・・・・・・・・・・・・・・ラジアルリップ
67・・・・・・・・・・・・・・・・・・・嵌合筒
67a・・・・・・・・・・・・・・・・・・嵌合筒部
67b・・・・・・・・・・・・・・・・・・内向鍔部
68・・・・・・・・・・・・・・・・・・・保持部
69・・・・・・・・・・・・・・・・・・・センサホルダ
70・・・・・・・・・・・・・・・・・・・回転速度センサ
71・・・・・・・・・・・・・・・・・・・微小隙間
N・・・・・・・・・・・・・・・・・・・・ナックル
1 ... hub wheel 1a, 6a ... inner rolling surface 1b ... ·············· Small diameter step 1c ·········· Double row rolling bearing 3・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outer member 4a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outer rolling surface 4b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・... Body mounting flange 5 ... Rolling element 6 ...・ ・ ・ ・ ・ Inner ring 7 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Wheel mounting flange 7a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・Bolt 8 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Clamping section 9 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Cage 10・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outboard side seal 11, 11 ′ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inboard side seal 12 ・... outer joint member 13 ... shoulder 14 ...・ ・ ・ ・ ・ ・ ・ ・ Fixing nut 15 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Sensor holder 16 ・ ・ ・ ・ ・ ・..... Fitting ring 16a ......... Fitting part 16b ...・ Screw part 16c, 21a, 22a, 25a .... Cylindrical part 17 ...・ Holding part 18 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Perforation 19 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Magnetic encoder 20 ·············· Rotational speed sensor 21 ··························· First seal plate 21b, 22b, 25b, 27b, 30b ··· Standing plate portion 22, 22 '········································· ..Tangular pieces 23, 26, 28, 29, 31 ... Labyrinth seal 24 ... Seal member 24a ... ..... side lip 24b ..... grease lip 24c ...・ ・ ・ Intermediate lip 25 ・ ・ ・ ・ ・ ・ ・ ・···································································· First Cylindrical portions 27c, 30c ......... Second cylindrical portion 51 ......... Outer member 51a ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outer rolling surface 51b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Car body mounting flange 52 ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner member 53 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rolling element 54 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ Wheel mounting flange 54a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hub bolt 55 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Hub Rings 55a, 56a ... Inside rolling surface 55b ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Small Diameter Step 55c ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Serration 56 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ Inner ring 57 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Retainer 58, 59 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Seal 60 ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outer joint member 61 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Stem 62 ・ ・ ・ ・ ・ ・........... first seal plate 63 ......... second seal plate 63a ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Cylindrical part 63b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Standing plate part 64 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・..... Magnetic encoder 65 ..... Core 66 ..・ ・ ・ ・ ・ ・ ・ ・ ・ Seal member 66a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Side lips 66b, 66c ・ ・ ・ ・ ・ ・ ・ ・ Radial Lip 67 ···············································.・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inward collar 68 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Holder 69 ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Sensor holder 70 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rotational speed sensor 71 ・ ・ ・ ・ ・ ・ ・ ・・ ・ ・ ・ ・ ・ Micro gap N ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Knuckle

Claims (6)

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円筒状の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内側転走面が形成された内方部材と、
前記外方部材および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たエンコーダと、このエンコーダに対向するように前記外方部材の端部に装着された円環状のセンサホルダと、
このセンサホルダに一体モールドされ、前記エンコーダに所定の軸方向すきまを介して対峙する回転速度センサと、を備えた回転速度検出装置付き車輪用軸受装置において、
前記センサホルダが、鋼鈑製の嵌合環と、この嵌合環に前記回転速度センサが一体モールドされた保持部とからなり、前記エンコーダが円環状をなし、その円周方向に関する特性が交互にかつ等間隔に変化するように構成されると共に、このエンコーダのインボード側に前記センサホルダを介してシールが配設され、このシールが前記嵌合環の内周面と前記内輪の外周面にそれぞれ装着され、互いに対向して配置された環状の第1および第2のシール板からなり、前記エンコーダと回転速度センサのインボード側に配設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 a double row outer rolling surface formed on the inner periphery;
A hub ring integrally having a wheel mounting flange for mounting a wheel at one end, and having a cylindrical small-diameter step portion extending in the axial direction on the outer periphery, and an inner ring press-fitted into the small-diameter step portion of the hub ring; An inner member formed on the outer periphery with an inner rolling surface facing the outer rolling surface of the double row,
A double row rolling element housed so as to be freely rollable between the rolling surfaces of the outer member and the inner member;
An encoder externally fitted to the inner ring, and an annular sensor holder attached to an end of the outer member so as to face the encoder;
In the wheel bearing device with a rotational speed detection device, comprising: a rotational speed sensor integrally molded with the sensor holder and facing the encoder through a predetermined axial clearance;
The sensor holder includes a steel-steel fitting ring and a holding portion in which the rotation speed sensor is integrally molded with the fitting ring. The encoder has an annular shape, and the characteristics in the circumferential direction are alternated. The seal is arranged on the inboard side of the encoder via the sensor holder, and the seal is arranged on the inner peripheral surface of the fitting ring and the outer peripheral surface of the inner ring. to be mounted respectively, face each other Ri Do from the first and second seal plates arranged annular, rotation speed detection, characterized that you have been arranged on the inboard side of the rotational speed sensor and the encoder Wheel bearing device with device.
記嵌合環が、前記外方部材の外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、前記外方部材の端面に密着される鍔部と、この鍔部から軸方向に延びる円筒部とからなり、この円筒部に前記第1のシール板が内嵌されている請求項1に記載の回転速度検出装置付き車輪用軸受装置。 Before Symbol fitting ring comprises a cylindrical fitting portion which is press-fitted into the outer periphery of the outer member extends from the fitting portion radially inward, and the outer flange portion that will be in close contact with the end face of the member consists of a rolled buildings cylindrical portion from the flange portion in the axial direction, the rotational speed detector equipped wheel support bearing assembly according to claim 1, wherein the first sealing plate is fitted into the the cylindrical portion. 前記第2のシール板が、前記内輪に外嵌された円筒部と、この円筒部から径方向外方に延びる立板部と、この立板部から軸方向に突設された舌片とを有、この舌片を前記センサホルダに僅かな径方向すきまを介して対向させてラビリンスシールが構成されている請求項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 second seal plate includes a cylindrical portion that is externally fitted to the inner ring, a vertical plate portion that extends radially outward from the cylindrical portion, and a tongue piece that protrudes axially from the vertical plate portion. have a, the tongue piece are opposed to each other via a slight radial gap in the sensor holder rotational speed detector equipped wheel support bearing assembly according to claim 1 or 2, labyrinth seal is constructed. 前記シールのさらにインボード側に断面略コの字状のシールドが配設され、このシールドを前記内方部材に僅かなすきまを介して対向させてラビリンスシールが構成される請求項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。 Said further shaped shield section substantially U inboard of the seal is disposed, the shield in claim 1 or 2 labyrinth seal is formed by opposing via the KOR slightly formed on the inner member The bearing apparatus for wheels with a rotational speed detection apparatus of description. 前記シールドは、前記センサホルダに内嵌される第1円筒部と、この第1円筒部から径方向内方に延びる立板部と、この立板部から軸方向に延びる第2円筒部とからなり、前記立板部を前記第2のシール板に僅かな軸方向すきまを介して対向させてラビリンスシールが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 shield includes a first cylindrical portion fitted in the sensor holder, a standing plate portion extending radially inward from the first cylindrical portion, and a second cylindrical portion extending in the axial direction from the standing plate portion. The wheel bearing device with a rotational speed detection device according to claim 4, wherein a labyrinth seal is configured such that the standing plate portion is opposed to the second seal plate via a slight axial clearance. 前記シールドは、前記センサホルダに内嵌される第1円筒部と、この第1円筒部から径方向内方に延びる立板部と、この立板部から軸方向に延びる第2円筒部とからなり、前記第2円筒部を前記内輪の端面に僅かな軸方向すきまを介して対向させてラビリンスシールが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 shield includes a first cylindrical portion fitted in the sensor holder, a standing plate portion extending radially inward from the first cylindrical portion, and a second cylindrical portion extending in the axial direction from the standing plate portion. The wheel bearing device with a rotational speed detection device according to claim 4, wherein a labyrinth seal is configured by causing the second cylindrical portion to face the end surface of the inner ring via a slight axial clearance.
JP2007122231A 2007-05-07 2007-05-07 Wheel bearing device with rotation speed detector Expired - Fee Related JP4628395B2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0450724U (en) * 1990-09-06 1992-04-28
JPH0474729U (en) * 1990-10-31 1992-06-30
JP2003254985A (en) * 2002-03-04 2003-09-10 Nsk Ltd Rolling bearing unit having rotating speed detecting device
JP2003262645A (en) * 2002-03-08 2003-09-19 Ntn Corp Rotation detector and antilock braking device using the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0450724U (en) * 1990-09-06 1992-04-28
JPH0474729U (en) * 1990-10-31 1992-06-30
JP2003254985A (en) * 2002-03-04 2003-09-10 Nsk Ltd Rolling bearing unit having rotating speed detecting device
JP2003262645A (en) * 2002-03-08 2003-09-19 Ntn Corp Rotation detector and antilock braking device using the same

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