JP5121429B2 - Wheel bearing device with rotation speed detector - Google Patents

Wheel bearing device with rotation speed detector Download PDF

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Publication number
JP5121429B2
JP5121429B2 JP2007317551A JP2007317551A JP5121429B2 JP 5121429 B2 JP5121429 B2 JP 5121429B2 JP 2007317551 A JP2007317551 A JP 2007317551A JP 2007317551 A JP2007317551 A JP 2007317551A JP 5121429 B2 JP5121429 B2 JP 5121429B2
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rotational speed
wheel
bearing device
magnetic
wheel bearing
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JP2009139286A (en
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一成 山本
晃 鳥居
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NTN Corp
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NTN Corp
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Priority to PCT/JP2008/003555 priority patent/WO2009072266A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings
    • F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/02—Housings
    • G01P1/026—Housings for speed measuring devices, e.g. pulse generator
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/443—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/187—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with all four raceways integrated on parts other than race rings, e.g. fourth generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

A bearing device adapted for use in a wheel and provided with a rotational speed detector, in which adverse influence of a wire harness to internal wiring is prevented and in which fixing of the wire harness is simplified so that the bearing device is assembled more easily. A cover (16) of a sensor holder (15) has a hollow circular cylindrical fitting section (16a) press fitted onto the inner end of an outer member (5), a flange (16b) extending radially inward from the fitting section (16a) and made to be in close contact with an end surface (5c) of the outer member (5), and a bottom (16c) extending inward radially from the flange (16b). A fixing section (23) projecting to the inner side from the bottom (16c) is formed at a portion outward radially of the bottom (16c). A cutout (23a) is formed in the fixing section (23), and a holding section (17) is integrally joined to the fixing section (23). A wire harness (27) vertically extends from the holding section (17). The axial gap between a magnetic encoder (22) and the holding section (17) surrounding a rotational speed sensor (28) is set to a range from 0.3 to 2.0 mm.

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

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

このような回転速度検出装置付き車輪用軸受装置の一例として図９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は、内輪５０に外嵌されたエンコーダ５１と、このエンコーダ５１に対向して外方部材５２の端部に装着されたセンサホルダ５３と、このセンサホルダ５３に装着され、エンコーダ５１に軸方向のエアギャップを介して対峙する回転速度センサ５４とを備えている。エンコーダ５１はシール５６を構成するスリンガ５７の側面に接合されている。   A structure as shown in FIG. 9 is known as an example of such a wheel bearing device with a rotational speed detection device. The rotational speed detection device includes an encoder 51 fitted on the inner ring 50, a sensor holder 53 attached to the end of the outer member 52 so as to face the encoder 51, and an encoder attached to the sensor holder 53. 51 is provided with a rotational speed sensor 54 facing the air gap in the axial direction. The encoder 51 is joined to the side surface of the slinger 57 constituting the seal 56.

シール５６は、断面略Ｌ字状に形成されたスリンガ５７と、このスリンガ５７に対向して外方部材５２装着され、断面略Ｌ字状に形成された環状のシール板５８とからなる。スリンガ５７は、内輪５０に外嵌された円筒部５７ａと、この円筒部５７ａから径方向外方に延びる立板部５７ｂとからなる。一方、シール板５８は、外方部材５２の端部に内嵌される芯金５９と、この芯金５９に加硫接着されたシール部材６０とからなる。このシール部材６０はゴム等のエラストマからなり、スリンガ５７の立板部５７ｂに摺接するサイドリップ６０ａと、円筒部５７ａに摺接するグリースリップ６０ｂおよび中間リップ６０ｃとからなる。   The seal 56 includes a slinger 57 having a substantially L-shaped cross section, and an annular seal plate 58 attached to the outer member 52 so as to face the slinger 57 and having a substantially L-shaped cross section. The slinger 57 includes a cylindrical portion 57a that is externally fitted to the inner ring 50, and a standing plate portion 57b that extends radially outward from the cylindrical portion 57a. On the other hand, the seal plate 58 includes a metal core 59 fitted into the end of the outer member 52, and a seal member 60 vulcanized and bonded to the metal core 59. The seal member 60 is made of an elastomer such as rubber, and includes a side lip 60a that is in sliding contact with the standing plate portion 57b of the slinger 57, and a grease lip 60b and an intermediate lip 60c that are in sliding contact with the cylindrical portion 57a.

センサホルダ５３は、外方部材５２に外嵌された鋼板製のカバー５５と、このカバー５５に結合された合成樹脂製の保持部６１とからなり、この保持部６１に回転速度センサ５４が包埋されている。カバー５５は、外方部材５２の外嵌された円筒状の嵌合部５５ａと、この嵌合部５５ａから径方向内方に延びる鍔部５５ｂと、この鍔部５５ｂから軸方向に延びる底部５５ｃとからなり、この底部５５ｃに保持部６１が結合されている。   The sensor holder 53 includes a steel plate cover 55 fitted on the outer member 52 and a synthetic resin holding portion 61 coupled to the cover 55, and the rotation speed sensor 54 is wrapped around the holding portion 61. Buried. The cover 55 includes a cylindrical fitting portion 55a in which the outer member 52 is fitted, a flange portion 55b extending radially inward from the fitting portion 55a, and a bottom portion 55c extending in an axial direction from the flange portion 55b. The holding portion 61 is coupled to the bottom portion 55c.

回転速度センサ５４の出力はハーネス６２によって取り出され、図示しないＡＢＳの制御器に送られる。ハーネス６２は、保持部６１に設けられた取出し口６３を介して結線されると共に、取出し口６３は、外側継手部材６４の外周面の傾斜角βよりも大きく設定された傾斜角αに形成されている。   The output of the rotational speed sensor 54 is taken out by the harness 62 and sent to an ABS controller (not shown). The harness 62 is connected via an extraction port 63 provided in the holding portion 61, and the extraction port 63 is formed at an inclination angle α set larger than the inclination angle β of the outer peripheral surface of the outer joint member 64. ing.

これにより、ハーネス６２が垂れ下がって外側継手部材６４と干渉するのを防止することができるので、ハーネス６２の垂れ下がりを止めるためのクリップが最小限で済むと共に、ハーネス６２自体も過度に曲げる必要がなくなり、内部配線への悪影響を防止して信頼性を一段と向上させることができる。したがって、簡単な構成でハーネス６２の固定作業を簡便化でき、組立の作業性を向上させてコスト低減を図ることができる（例えば、特許文献１参照。）。   As a result, the harness 62 can be prevented from sagging and interfering with the outer joint member 64, so that the number of clips for stopping the harness 62 from sagging can be minimized, and the harness 62 itself need not be bent excessively. Therefore, the adverse effect on the internal wiring can be prevented and the reliability can be further improved. Therefore, it is possible to simplify the fixing work of the harness 62 with a simple configuration, improve the workability of assembly, and reduce the cost (see, for example, Patent Document 1).

また、図１０に示すような構造も提案されている。この回転速度検出装置は、外方部材６７の端部に装着されたセンサホルダ６８と、このセンサホルダ６８に対向して内輪６９に外嵌されたエンコーダ７０とを備えている。センサホルダ６８は、外方部材６７に外嵌される円筒状の嵌合部７１ａ、およびこの嵌合部７１ａの内端縁から内方に向け直角に折れ曲がった鍔部７１ｂからなる鋼板製のカバー７１と、このカバー７１の内側面から突出した状態で設けられた合成樹脂製の保持部７２とからなり、この保持部７２に回転速度センサ（図示せず）が包埋されている。また、エンコーダ７０はシール７３に接合されている。   A structure as shown in FIG. 10 has also been proposed. The rotational speed detection device includes a sensor holder 68 attached to the end of the outer member 67 and an encoder 70 that is externally fitted to the inner ring 69 so as to face the sensor holder 68. The sensor holder 68 is a steel plate cover comprising a cylindrical fitting portion 71a fitted on the outer member 67 and a flange portion 71b bent at a right angle from the inner end edge of the fitting portion 71a toward the inside. 71 and a synthetic resin holding portion 72 provided in a state of protruding from the inner surface of the cover 71, and a rotation speed sensor (not shown) is embedded in the holding portion 72. The encoder 70 is joined to the seal 73.

保持部７２は、図１１に示すように、カバー７１の径方向外側の幅が広く、内側の幅が狭い扇形に形成され、保持部７２の円周方向端面を仕切る端壁７４およびカバー７１の鍔部７１ｂの一部には、互いに連続する透孔７５が設けられている。そして、ハーネス７６がこの透孔７５の内側を通過する状態で端壁７４から突出している。なお、回転速度センサを保持部７２に設置して保持部７２内に合成樹脂を充填固化した状態で、この透孔７５は塞がれる。   As shown in FIG. 11, the holding portion 72 is formed in a sector shape in which the width of the outer side in the radial direction of the cover 71 is wide and the inner width is narrow, and the end wall 74 and the cover 71 that partition the circumferential end surface of the holding portion 72 A part of the flange 71b is provided with a through hole 75 that is continuous with each other. The harness 76 protrudes from the end wall 74 in a state of passing through the inside of the through hole 75. The through hole 75 is closed in a state in which the rotation speed sensor is installed in the holding portion 72 and the holding portion 72 is filled and solidified with synthetic resin.

ここで、ハーネス７６は、カバー７１の円周方向に取り出されている。これにより、このハーネス７６が、図示しない等速自在継手と干渉することがなく、内部配線作業が簡便化できると共に、信頼性が向上する（例えば、特許文献２参照。）。
特開２００６−１４５４１８号公報 特許第３２３１１８５号公報 Here, the harness 76 is taken out in the circumferential direction of the cover 71. As a result, the harness 76 does not interfere with a constant velocity universal joint (not shown), the internal wiring work can be simplified, and the reliability is improved (for example, see Patent Document 2).
JP 2006-145418 A Japanese Patent No. 3231185

然しながら、この従来の回転速度検出装置付き車輪用軸受装置のうち前者では、取出し口６３を傾斜させて外側継手部材６４との干渉を避けているが、ナックル６６への組立時には、ハーネス６２を一旦ナックル６６の内径を通さなければならないため、取出し口６３がこのナックル６６に干渉しないようにしなければならない。これでは組立作業が煩雑となり、工数が嵩むという問題が内在していた。   However, in the former of the conventional wheel bearing device with a rotational speed detecting device, the take-out port 63 is inclined to avoid interference with the outer joint member 64. However, when assembling the knuckle 66, the harness 62 is temporarily attached. Since the inner diameter of the knuckle 66 must be passed, the takeout port 63 must not interfere with the knuckle 66. In this case, the assembly work becomes complicated and the problem of increasing man-hours is inherent.

一方、後者の回転速度検出装置では、ハーネス７６がカバー７１の円周方向に取り出されているので、組立時に等速自在継手と干渉するのを避けることができるが、円周方向に取り出されたハーネス７６は、一般的にナックル（図示せず）の上方側へ取り出して、車体側のハーネスとコネクタで結線される。したがって、こうした従来の構造では、組立時に取り出したハーネス７６を折り曲げて結線する必要があり、煩雑な作業となるだけでなく、過度の曲げによるハーネス７６の内部配線への悪影響が問題となる。   On the other hand, in the latter rotational speed detection device, since the harness 76 is taken out in the circumferential direction of the cover 71, it is possible to avoid interference with the constant velocity universal joint during assembly, but the harness 76 is taken out in the circumferential direction. The harness 76 is generally taken out above the knuckle (not shown) and connected by a harness and a connector on the vehicle body side. Therefore, in such a conventional structure, it is necessary to bend and connect the harness 76 taken out at the time of assembly, which is not only a cumbersome operation, but also an adverse effect on the internal wiring of the harness 76 due to excessive bending.

本発明は、このような事情に鑑みてなされたもので、ハーネスの内部配線への悪影響を防止すると共に、ハーネスの固定作業を簡便化し、組立の作業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 has a wheel with a rotational speed detection device that prevents adverse effects on the internal wiring of the harness, simplifies the fixing work of the harness, and improves the workability of the assembly. An object of the present invention is to provide a bearing device for a vehicle.

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られるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に嵌合された内輪または等速自在継手の外側継手部材からなり、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、この内方部材および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外周に圧入された円環状のカバー、およびこのカバーに結合され、回転速度センサが包埋された合成樹脂製の保持部からなる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、前記外方部材のインナー側の端部に内嵌され、鋼板からプレス加工により断面略Ｌ字状に形成された芯金、およびこの芯金に一体に接合されたシール部材からなる環状のシール板と、このシール板に対向して前記内方部材の外径に圧入され、鋼板からプレス加工により断面略Ｌ字状に形成されたスリンガとからなると共に、このスリンガのインナー側の側面に、周方向に関する特性が交互にかつ等間隔に変化するエンコーダが接合され、このエンコーダが前記回転速度センサに所定の軸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、前記カバーが、前記外方部材のインナー側の端部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、この鍔部からさらに径方向内方に延びる底部とを備え、この底部の径方向外方の周方向一箇所に、当該底部からインナー側に突出して固定部が形成され、この固定部に切欠き部が形成されて前記保持部が前記カバーの嵌合部にまで回り込んで一体に結合されると共に、この保持部のインナー側の側面が平坦に形成され、当該保持部からハーネスが垂直方向に延びている。
In order to achieve such an 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 integrally on the inner periphery. A hub wheel integrally formed with a formed outer member and a wheel mounting flange for mounting a wheel at one end, and having a small-diameter step portion extending in the axial direction on the outer periphery, and a small-diameter step portion of the hub ring An inner member comprising an outer joint member of a fitted inner ring or a constant velocity universal joint, and 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, and the inner member And a double row rolling element accommodated between both rolling surfaces of the outer member, and an opening in an annular space formed between the outer member and the inner member. A seal, an annular cover press-fitted into the outer periphery of the inner side end of the outer member, and A sensor holder including a synthetic resin holding portion that is coupled to the cover and in which a rotation speed sensor is embedded, and an inner seal of the seal is disposed at an inner end of the outer member. An annular seal plate that is fitted and formed from a steel plate into a substantially L-shaped cross section by pressing, and an annular seal plate integrally joined to the core, and the inner side facing the seal plate It consists of a slinger that is press-fitted into the outer diameter of the member and formed into a substantially L-shaped cross section by pressing from a steel plate, and the circumferential characteristics alternately and equally change on the inner side surface of this slinger. In the wheel bearing device with a rotational speed detection device in which an encoder is joined and the encoder is opposed to the rotational speed sensor via a predetermined axial clearance, the cover includes the outer side A cylindrical fitting portion that is press-fitted into the inner end portion of the material, a flange portion that extends radially inward from the fitting portion, and that is in close contact with the end surface of the outer member; A bottom portion extending inward in the radial direction, and a fixed portion is formed projecting from the bottom portion to the inner side at one circumferentially outer side in the radial direction of the bottom portion, and a notch portion is formed in the fixed portion. The holding portion wraps around to the fitting portion of the cover and is integrally coupled, and the side surface on the inner side of the holding portion is formed flat, and the harness extends in the vertical direction from the holding portion .

このように、外方部材のインナー側の端部外周に圧入された円環状のカバー、およびこのカバーに結合され、回転速度センサが包埋された合成樹脂製の保持部からなるセンサホルダとを備え、インナー側のシールが、外方部材のインナー側の端部に内嵌され、鋼板からプレス加工により断面略Ｌ字状に形成された芯金、およびこの芯金に一体に接合されたシール部材からなる環状のシール板と、このシール板に対向して内方部材の外径に圧入され、鋼板からプレス加工により断面略Ｌ字状に形成されたスリンガとからなると共に、このスリンガのインナー側の側面に、周方向に関する特性が交互にかつ等間隔に変化するエンコーダが接合され、このエンコーダが回転速度センサに所定の軸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、カバーが、外方部材のインナー側の端部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、外方部材の端面に密着される鍔部と、この鍔部からさらに径方向内方に延びる底部とを備え、この底部の径方向外方の周方向一箇所に、当該底部からインナー側に突出して固定部が形成され、この固定部に切欠き部が形成されて保持部がカバーの嵌合部にまで回り込んで一体に結合されると共に、この保持部のインナー側の側面が平坦に形成され、当該保持部からハーネスが垂直方向に延びているので、ハーネスがナックルの外径側へ取り出し易くなって組立の作業性が向上すると共に、組立時に取り出したハーネスを折り曲げて結線する必要がなくなり、過度の曲げによるハーネスの内部配線への悪影響を防止することができ、信頼性を向上させることができる。 Thus, an annular cover press-fitted into the outer periphery of the inner side end of the outer member, and a sensor holder composed of a synthetic resin holding part that is coupled to the cover and in which the rotation speed sensor is embedded. An inner-side seal is fitted into the inner-side end of the outer member and is formed from a steel plate into a substantially L-shaped cross section by pressing, and a seal integrally joined to the core An annular seal plate made of a member, and a slinger that is press-fitted into the outer diameter of the inner member facing the seal plate and formed into a substantially L-shaped cross section by pressing from a steel plate. On the side surface, an encoder whose characteristics in the circumferential direction change alternately and at equal intervals is joined, and this encoder is attached to the rotation speed sensor via a predetermined axial clearance. In the wheel bearing device, the cover is press-fitted into the inner end of the outer member, and the cylindrical fitting portion extends radially inward from the fitting portion and is in close contact with the end surface of the outer member. And a bottom portion extending further inward in the radial direction from the flange portion, and a fixing portion is formed protruding from the bottom portion to the inner side at one circumferentially outer side of the bottom portion. A notch portion is formed in the fixing portion, and the holding portion wraps around to the fitting portion of the cover and is integrally coupled, and the inner side surface of the holding portion is formed flat, and the harness is connected to the holding portion from the holding portion. Since it extends in the vertical direction, the harness can be easily taken out to the outer diameter side of the knuckle, improving the workability of the assembly, and it is not necessary to bend and connect the harness taken out at the time of assembly. Negative impact on wiring It can be prevented, thereby improving the reliability.

好ましくは、請求項２に記載の発明のように、前記エンコーダが、エラストマに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で構成されると共に、前記回転速度センサが、磁束の流れ方向に応じて特性を変化させる磁気検出素子、およびこの磁気検出素子の出力波形を整える波形成形回路が組み込まれたＩＣ素子を備えていれば、低コストで信頼性の高い回転速度検出ができる。   Preferably, as in the invention described in claim 2, the encoder is composed of a magnetic encoder in which magnetic powder is mixed in an elastomer and magnetic poles N and S are alternately magnetized in the circumferential direction, and the encoder If the rotational speed sensor has a magnetic detection element that changes its characteristics according to the flow direction of magnetic flux, and an IC element that incorporates a waveform shaping circuit that adjusts the output waveform of this magnetic detection element, it is low-cost and reliable. High rotation speed can be detected.

また、請求項３に記載の発明のように、前記磁気エンコーダと回転速度センサを包埋する前記保持部との軸方向すきまが０．３〜２．０ｍｍの範囲に設定されていれば、磁気エンコーダの面振れおよび回転速度センサの取付誤差によって両者が接触することはなく、また、磁気エンコーダの磁束密度が小さくなって出力特性低下に繋がることもない。   If the axial clearance between the magnetic encoder and the holding portion that embeds the rotational speed sensor is set in the range of 0.3 to 2.0 mm, Both of them do not come into contact with each other due to the surface deflection of the encoder and the mounting error of the rotation speed sensor, and the magnetic flux density of the magnetic encoder does not decrease, leading to a decrease in output characteristics.

また、請求項４に記載の発明のように、前記ＩＣ素子が合成樹脂でモールドされ、このＩＣ素子から前記保持部の表面までのモールド厚さが０．１〜１．５ｍｍの範囲に設定されていれば、磁気エンコーダの表面に異物が付着した場合、この異物でモールド部が摩耗してもＩＣ素子が露出することはなく、また、磁気エンコーダの磁束密度が小さくなって出力特性低下に繋がることもない。   According to a fourth aspect of the present invention, the IC element is molded with a synthetic resin, and a mold thickness from the IC element to the surface of the holding portion is set in a range of 0.1 to 1.5 mm. If the foreign matter adheres to the surface of the magnetic encoder, the IC element will not be exposed even if the mold part is worn by the foreign matter, and the magnetic flux density of the magnetic encoder is reduced, leading to a decrease in output characteristics. There is nothing.

また、請求項５に記載の発明のように、前記回転速度センサに凹み部が形成され、この凹み部に前記ＩＣ素子が合成樹脂でモールドされていれば、磁気エンコーダの表面に異物が付着し、この異物で回転速度センサの端面が摩耗しても凹み部に及ぶのを抑制し、ＩＣ素子が露出するのを防止することができる。   Further, as in the invention described in claim 5, if a recess is formed in the rotational speed sensor, and the IC element is molded with a synthetic resin in the recess, foreign matter adheres to the surface of the magnetic encoder. Even if the end face of the rotational speed sensor is worn by the foreign matter, it can be prevented from reaching the dent, and the IC element can be prevented from being exposed.

好ましくは、請求項６に記載の発明のように、前記凹み部の深さが０．１〜１．０ｍｍの範囲に設定されていれば、回転速度センサの端面が摩耗しても凹み部に及ぶのを確実に防止することができ、また、磁気エンコーダの磁束密度が小さくなって出力特性低下に繋がることもない。   Preferably, as in the invention described in claim 6, if the depth of the recess is set in a range of 0.1 to 1.0 mm, even if the end surface of the rotation speed sensor is worn, In addition, it is possible to surely prevent the magnetic field from reaching, and the magnetic flux density of the magnetic encoder is reduced, so that the output characteristics are not deteriorated.

また、請求項７に記載の発明のように、前記保持部の端面と前記磁気エンコーダとの軸方向すきまが０．３〜１．０ｍｍの範囲に設定されていれば、磁気エンコーダの面振れおよび回転速度センサの取付誤差によって両者が接触することはなく、また、磁気エンコーダの磁束密度が小さくなって出力特性低下に繋がることもない。   Further, as in the seventh aspect of the invention, if the axial clearance between the end surface of the holding portion and the magnetic encoder is set in the range of 0.3 to 1.0 mm, the surface deflection of the magnetic encoder and Due to the mounting error of the rotation speed sensor, they do not come into contact with each other, and the magnetic flux density of the magnetic encoder is reduced, and the output characteristics are not lowered.

また、請求項８に記載の発明のように、前記底部の路面から最も近い側の周方向一箇所にドレーン孔が穿設されていれば、車両走行中に底部内に泥水や小石等の異物が入り込んだとしても容易に排出され、長時間に亘って滞留することはない。したがって、異物が車両停止時に固着して周辺部品に悪影響を及ぼすのを防止することができる。   Further, as in the invention described in claim 8, if a drain hole is drilled at one place in the circumferential direction closest to the road surface of the bottom portion, foreign matter such as muddy water and pebbles in the bottom portion during traveling of the vehicle Even if it enters, it is easily discharged and does not stay for a long time. Therefore, it is possible to prevent foreign matters from adhering when the vehicle is stopped and adversely affecting peripheral components.

また、請求項９に記載の発明のように、前記カバーが非磁性体のオーステナイト系ステンレス鋼鈑から形成されていれば、回転速度センサの感知性能に悪影響を及ぼさず、正確な検出精度を確保することができる。   In addition, if the cover is made of a non-magnetic austenitic stainless steel plate as in the ninth aspect of the invention, the detection performance of the rotational speed sensor is not adversely affected and accurate detection accuracy is ensured. can do.

また、請求項１０に記載の発明のように、前記保持部が非磁性のポリフェニレンサルファイドで形成されていれば、回転速度センサの感知性能に悪影響を及ぼさず、また、耐食性に優れ、長期間に亘って強度・耐久性を向上させることができる。   Further, as in the invention described in claim 10, if the holding portion is made of non-magnetic polyphenylene sulfide, it does not adversely affect the sensing performance of the rotational speed sensor, has excellent corrosion resistance, and has a long period of time. It is possible to improve strength and durability.

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られるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に嵌合された内輪または等速自在継手の外側継手部材からなり、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、この内方部材および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外周に圧入された円環状のカバー、およびこのカバーに結合され、回転速度センサが包埋された合成樹脂製の保持部からなる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、前記外方部材のインナー側の端部に内嵌され、鋼板からプレス加工により断面略Ｌ字状に形成された芯金、およびこの芯金に一体に接合されたシール部材からなる環状のシール板と、このシール板に対向して前記内方部材の外径に圧入され、鋼板からプレス加工により断面略Ｌ字状に形成されたスリンガとからなると共に、このスリンガのインナー側の側面に、周方向に関する特性が交互にかつ等間隔に変化するエンコーダが接合され、このエンコーダが前記回転速度センサに所定の軸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、前記カバーが、前記外方部材のインナー側の端部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、この鍔部からさらに径方向内方に延びる底部とを備え、この底部の径方向外方の周方向一箇所に、当該底部からインナー側に突出して固定部が形成され、この固定部に切欠き部が形成されて前記保持部が前記カバーの嵌合部にまで回り込んで一体に結合されると共に、この保持部のインナー側の側面が平坦に形成され、当該保持部からハーネスが垂直方向に延びているので、ハーネスがナックルの外径側へ取り出し易くなって組立の作業性が向上すると共に、組立時に取り出したハーネスを折り曲げて結線する必要がなくなり、過度の曲げによるハーネスの内部配線への悪影響を防止することができ、信頼性を向上させることができる。
A bearing device for a wheel 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 surface 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 a small-diameter step portion of the hub wheel. An inner member comprising an outer joint member of an inner ring or a constant velocity universal joint, and an inner member in which a double row inner rolling surface facing the double row outer rolling surface is formed on the outer periphery, and the inner member and the outer member A double-row rolling element accommodated between both rolling surfaces of the member, and a seal attached to an opening of an annular space formed between the outer member and the inner member; An annular cover press-fitted into the outer periphery of the inner side end of the outer member, and this And a sensor holder comprising a synthetic resin holding portion embedded in a rotational speed sensor, and the inner seal of the seal is fitted into the inner end of the outer member. And an annular seal plate formed of a metal core formed into a substantially L-shaped cross section by pressing from a steel plate, a seal member integrally joined to the metal core, and the inner member facing the seal plate Encoder which is press-fitted into the outer diameter of the slinger and formed into a substantially L-shaped cross-section by pressing from a steel plate, and the characteristics relating to the circumferential direction are alternately and equally spaced on the inner side surface of the slinger In the wheel bearing device with a rotational speed detection device in which the encoder is opposed to the rotational speed sensor via a predetermined axial clearance, the cover includes the outer member. A cylindrical fitting portion that is press-fitted into the end portion on the inner side, a flange portion that extends inward in the radial direction from the fitting portion, and that is in close contact with the end surface of the outer member, and further in the radial direction from the flange portion An inwardly extending bottom portion, and a fixed portion is formed projecting from the bottom portion toward the inner side at one circumferentially outer side in the radial direction of the bottom portion. with parts are coupled together wraps around to the fitting portion of the cover, the inner side surface of the holding portion is formed flat, since the harness from the holding portion extends in a vertical direction, harness The knuckle can be easily taken out to the outer diameter side, improving the workability of the assembly, and eliminating the need to bend and connect the harness that was taken out during assembly, thus preventing adverse effects on the internal wiring of the harness due to excessive bending. , Improve reliability Can be made.

外周にナックルに取り付けられるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に前記複列の外側転走面の一方に対向する内側転走面と、この内側転走面から軸方向に延びる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、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、この内方部材および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外周に圧入された環状のカバー、およびこのカバーに結合され、回転速度センサが包埋された合成樹脂製の保持部からなる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、前記外方部材のインナー側の端部に内嵌され、鋼板からプレス加工により断面略Ｌ字状に形成された芯金、およびこの芯金に一体に接合されたシール部材からなる環状のシール板と、このシール板に対向して前記内輪の外径に圧入され、鋼板からプレス加工により断面略Ｌ字状に形成されたスリンガとからなると共に、このスリンガのインナー側の側面に、エラストマに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が接合され、この磁気エンコーダが前記回転速度センサに所定の軸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、前記カバーが、前記外方部材のインナー側の端部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、この鍔部からさらに径方向内方に延びる底部とを備え、この底部の径方向外方の周方向一箇所に、当該底部からインナー側に突出して固定部が形成され、この固定部に切欠き部が形成されて前記保持部が前記カバーの嵌合部にまで回り込んで一体に結合されると共に、この保持部のインナー側の側面が平坦に形成され、当該保持部からハーネスが垂直方向に延び、前記磁気エンコーダと回転速度センサを包埋する前記保持部との軸方向すきまが０．３〜２．０ｍｍの範囲に設定されている。 A vehicle body mounting flange to be attached to the knuckle on the outer periphery, an outer member in which a double row outer rolling surface is integrally formed on the inner periphery, and a wheel mounting flange to mount a wheel on one end A hub wheel integrally formed and formed on the outer periphery with an inner rolling surface facing one of the double row outer rolling surfaces, and a cylindrical small-diameter stepped portion extending in the axial direction from the inner rolling surface; and An inner member comprising an inner ring press-fitted into the small-diameter step portion of the hub wheel and having an inner rolling surface facing the other of the outer rolling surfaces of the double row on the outer periphery, and the inner member and the outer member A double-row rolling element accommodated between both rolling surfaces of the member, and a seal attached to an opening of an annular space formed between the outer member and the inner member; An annular cover press-fitted into the outer periphery of the inner side end of the outer member, and the cover And a sensor holder comprising a synthetic resin holding portion in which a rotational speed sensor is embedded, and an inner seal of the seal is fitted into an inner end of the outer member, and a steel plate And press-fit into the outer diameter of the inner ring facing the seal plate, and an annular seal plate formed of a core member formed into a substantially L-shaped cross section by pressing and a seal member integrally joined to the core metal The slinger is formed from a steel plate by press working to have a substantially L-shaped cross section, and magnetic powder is mixed in the elastomer on the inner side surface of the slinger so that the magnetic poles N and S are alternately arranged in the circumferential direction. In a wheel bearing device with a rotational speed detection device in which a magnetized magnetic encoder is joined and the magnetic encoder is opposed to the rotational speed sensor via a predetermined axial clearance, the cover includes: A cylindrical fitting portion that is press-fitted into the inner side end portion of the outer member, a flange portion that extends radially inward from the fitting portion, and is in close contact with the end surface of the outer member, And a bottom portion extending further inward in the radial direction from the portion, and a fixed portion is formed projecting from the bottom portion to the inner side at one circumferentially outer side of the bottom portion, and a notch portion is formed in the fixed portion. The holding part is formed to be joined to the fitting part of the cover and integrally joined, and the side surface on the inner side of the holding part is formed flat, and the harness extends in the vertical direction from the holding part , The axial clearance between the magnetic encoder and the holding portion embedding the rotation speed sensor is set in a range of 0.3 to 2.0 mm.

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の検出部を示す要部拡大図、図３は、図１の軸受部の側面図、図４は、本発明に係るカバーを示す正面図、図５は、図４のカバーの変形例を示す正面図、図６は、検出部を示す説明図、図７は、図６の変形例を示す説明図である。なお、以下の説明では、車両に組み付けた状態で車両の外側寄りとなる側をアウター側（図１の左側）、中央寄り側をインナー側（図１の右側）という。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
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, FIG. 2 is an enlarged view of a main part showing a detection unit of FIG. 1, and FIG. 4 is a front view showing a cover according to the present invention, FIG. 5 is a front view showing a modification of the cover of FIG. 4, and FIG. 6 is an explanatory view showing a detection unit. 7 is an explanatory view showing a modification 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 outer side (left side in FIG. 1), and the side closer to the center is referred to as the inner side (right side in FIG. 1).

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世代と称され、ハブ輪１と内輪２からなる内方部材３と、この内方部材３に複列の転動体（ボール）４、４を介して外挿された外方部材５とを備え、等速自在継手１０が連結されている。   This wheel bearing device with a rotational speed detection device is called a third generation for driving wheels, and includes an inner member 3 composed of a hub wheel 1 and an inner ring 2, and double row rolling elements (balls) on the inner member 3. 4 and 4 and an outer member 5 inserted through 4 and 4, and a constant velocity universal joint 10 is connected to the outer member 5.

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６を一体に有し、この車輪取付フランジ６の円周等配位置にハブボルト６ａが植設されている。また、外周にはアウター側（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、内周には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。ハブ輪１の小径段部１ｂには外周に内輪２が所定のシメシロを介して圧入固定され、この内輪２の外周にはインナー側（他方）の内側転走面２ａが形成されている。   The hub wheel 1 integrally has a wheel mounting flange 6 for attaching a wheel (not shown) to an end portion on the outer side, and hub bolts 6 a are implanted at circumferentially equidistant positions of the wheel mounting flange 6. Yes. Further, an outer side (one) inner rolling surface 1a and a cylindrical small-diameter step portion 1b extending in the axial direction from the inner rolling surface 1a are formed on the outer periphery, and a torque transmission serration ( Or a spline) 1c is formed. An inner ring 2 is press-fitted and fixed to the outer periphery of the small-diameter step portion 1b of the hub wheel 1 through a predetermined shimiro, and an inner side (other side) inner rolling surface 2a is formed on the outer periphery of the inner ring 2.

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、後述するシール８のシールランド部となる車輪取付フランジ６のインナー側の基部６ｂから小径段部１ｂに亙って高周波焼入れによって表面硬さを５８〜６４ＨＲＣの範囲に硬化処理が施されている。これにより、基部６ｂの耐摩耗性が向上するだけでなく、内輪２の嵌合面となる小径段部１ｂのフレッティングが抑制されると共に、車輪取付フランジ６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の耐久性が向上する。なお、内輪２および転動体４は、ＳＵＪ２等の高炭素クロム軸受鋼からなり、ズブ焼入れによって芯部まで５８〜６４ＨＲＣの範囲に硬化処理が施されている。   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 an inner rolling surface 1a and an inner side of a wheel mounting flange 6 serving as a seal land portion of a seal 8 described later. The surface hardness is set in the range of 58 to 64 HRC by induction hardening from the base 6b to the small diameter step 1b. As a result, not only the wear resistance of the base portion 6b is improved, but also the fretting of the small-diameter step portion 1b serving as the fitting surface of the inner ring 2 is suppressed, and the rotational bending load applied to the wheel mounting flange 6 is suppressed. And sufficient mechanical strength, and the durability of the hub wheel 1 is improved. The inner ring 2 and the rolling element 4 are made of a high carbon chrome bearing steel such as SUJ2, and are hardened in the range of 58 to 64 HRC up to the core by quenching.

外方部材５はＳ５３Ｃ等の炭素０．４０〜０．８０ｗｔ％を含む中高炭素鋼からなり、外周にナックル（図示せず）に取り付けるための車体取付フランジ５ｂを一体に有し、内周に前記内方部材３の複列の内側転走面１ａ、２ａに対向する複列の外側転走面５ａ、５ａが一体に形成されている。これら複列の外側転走面５ａ、５ａは高周波焼入れによって表面硬さを５８〜６４ＨＲＣの範囲に硬化処理が施されている。この外方部材５の複列の外側転走面５ａ、５ａと、これらに対向する内方部材３の複列の内側転走面１ａ、２ａ間には複列の転動体４、４がそれぞれ収容され、保持器７、７によって転動自在に保持されている。また、外方部材５と内方部材３との間に形成される環状空間の開口部にはシール８、９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 outer member 5 is made of medium-high carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and integrally has a vehicle body mounting flange 5b for attaching to a knuckle (not shown) on the outer periphery. Double row outer rolling surfaces 5a, 5a facing the double row inner rolling surfaces 1a, 2a of the inner member 3 are integrally formed. These double-row outer raceway surfaces 5a and 5a are subjected to a curing process with a surface hardness of 58 to 64 HRC by induction hardening. Between the double-row outer rolling surfaces 5a and 5a of the outer member 5 and the double-row inner rolling surfaces 1a and 2a of the inner member 3 opposed thereto, double-row rolling elements 4 and 4 are respectively provided. It is accommodated and held by the cages 7 and 7 so as to be able to roll. In addition, seals 8 and 9 are attached to the opening of the annular space formed between the outer member 5 and the inner member 3, and leakage of lubricating grease sealed inside the bearing and the inside of the bearing from the outside. Prevents intrusion of rainwater and dust.

なお、ここでは、転動体４をボールとした複列アンギュラ玉軸受で構成された車輪用軸受装置を例示したが、これに限らず転動体４に円すいころを使用した複列円すいころ軸受であっても良い。   Here, the wheel bearing device constituted by a double row angular contact ball bearing in which the rolling element 4 is a ball is illustrated, but the present invention is not limited to this, and a double row tapered roller bearing using a tapered roller for the rolling element 4 is used. May be.

等速自在継手１０は、外側継手部材１１と、図示しない継手内輪とケージおよびトルク伝達ボールとを備えている。外側継手部材１１は、肩部１２から軸方向に延びる軸部１３を一体に有している。軸部１３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１３ａと、このセレーション１３ａの端部に雄ねじ１３ｂが形成されている。そして、肩部１２が内輪２の端面と衝合するまでハブ輪１に外側継手部材１１がセレーション１ｃ、１３ａを介して内嵌され、雄ねじ１３ｂに締結された固定ナット１４によってハブ輪１と外側継手部材１１がトルク伝達可能に、かつ着脱自在に結合されている。   The constant velocity universal joint 10 includes an outer joint member 11, a joint inner ring (not shown), a cage, and a torque transmission ball. The outer joint member 11 integrally has a shaft portion 13 extending in the axial direction from the shoulder portion 12. A serration 13 a that engages with the serration 1 c of the hub wheel 1 and an external thread 13 b are formed at the end of the serration 13 a on the outer periphery of the shaft portion 13. Then, the outer joint member 11 is fitted into the hub wheel 1 through the serrations 1c and 13a until the shoulder 12 abuts the end surface of the inner ring 2, and the hub wheel 1 and the outer side are fixed by the fixing nut 14 fastened to the male screw 13b. The joint member 11 is detachably coupled so as to be able to transmit torque.

本実施形態では、センサホルダ１５が外方部材５の端部に装着されている。このセンサホルダ１５は、保持部１７およびハーネス２７からなる。外方部材５のインナー側の端部にカバー１６が外嵌され、該カバー１６に、後述するように、センサホルダ１５が固定されている。カバー１６は、図２に拡大して示すように、外方部材５のインナー側の端部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、外方部材５の端面５ｃに密着する鍔部１６ｂと、この鍔部１６ｂからさらに径方向内方に延びる底部１６ｃとからなり、全体として円環状に形成されている。そして、底部１６ｃの内縁と外側継手部材１１の肩部１２とが僅かな径方向すきまを介して対峙し、ラビリンスシールが構成されている。   In the present embodiment, the sensor holder 15 is attached to the end portion of the outer member 5. The sensor holder 15 includes a holding part 17 and a harness 27. A cover 16 is fitted on the inner end of the outer member 5, and a sensor holder 15 is fixed to the cover 16 as will be described later. As shown in an enlarged view in FIG. 2, the cover 16 has a cylindrical fitting portion 16a that is press-fitted into the outer periphery of the inner side end portion of the outer member 5, and extends radially inward from the fitting portion 16a. The flange portion 16b is in close contact with the end surface 5c of the outer member 5, and the bottom portion 16c extends further radially inward from the flange portion 16b, and is formed in an annular shape as a whole. And the inner edge of the bottom part 16c and the shoulder part 12 of the outer joint member 11 are opposed to each other through a slight radial clearance to form a labyrinth seal.

このように、鍔部１６ｂを外方部材５の端面５ｃに密着させた状態で、嵌合部１６ａが外方部材５のインナー側の端部に外嵌されているので、外方部材５に対してセンサホルダ１５を容易に、かつ正確に位置決め固定することができ、車輪の回転速度を精度良く検出することができる。このカバー１６は、耐食性を有する非磁性体の鋼鈑、例えば、オーステナイト系ステンレス鋼鈑（ＪＩＳ規格のＳＵＳ３０４系等）等のステンレス鋼板をプレス加工にて形成されている。これにより、回転速度センサ２８の感知性能に悪影響を及ぼさず、また、カバー１６の発錆を抑えて長期間に亘って信頼性を維持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ができる。   As described above, the fitting portion 16a is fitted on the inner side end portion of the outer member 5 in a state where the flange portion 16b is in close contact with the end surface 5c of the outer member 5. On the other hand, the sensor holder 15 can be positioned and fixed easily and accurately, and the rotational speed of the wheel can be detected with high accuracy. The cover 16 is formed by pressing a non-magnetic steel plate having a corrosion resistance, for example, a stainless steel plate such as an austenitic stainless steel plate (JIS standard SUS304 type or the like). Thus, there is provided a wheel bearing device with a rotation speed detection device that does not adversely affect the sensing performance of the rotation speed sensor 28 and also prevents rusting of the cover 16 and maintains reliability over a long period of time. Can do.

インナー側のシール９は、内輪２の外径に圧入されたスリンガ１８と、このスリンガ１８に対向して外方部材５に装着され、断面略Ｌ字状に形成された環状のシール板１９とからなる、所謂パックシールで構成されている。   The inner-side seal 9 includes a slinger 18 press-fitted into the outer diameter of the inner ring 2, and an annular seal plate 19 mounted on the outer member 5 so as to face the slinger 18 and having a substantially L-shaped cross section. It is comprised with what is called a pack seal.

シール板１９は、外方部材５のインナー側の端部に内嵌される芯金２０と、この芯金２０に加硫接着されたシール部材２１とからなる。芯金２０は、オーステナイト系ステンレス鋼鈑（ＪＩＳ規格のＳＵＳ３０４系等）、あるいは冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系等）からプレス加工にて断面略Ｌ字状に形成されている。一方、シール部材２１は合成ゴム等の弾性部材からなり、サイドリップ２１ａと、グリースリップ２１ｂおよび中間リップ２１ｃからなる。   The seal plate 19 includes a cored bar 20 that is fitted into the inner side end of the outer member 5, and a seal member 21 that is vulcanized and bonded to the cored bar 20. The metal core 20 is formed into a substantially L-shaped cross section by press working from an austenitic stainless steel plate (JIS standard SUS304 type or the like) or a cold rolled steel plate (JIS standard SPCC type or the like). On the other hand, the seal member 21 is made of an elastic member such as synthetic rubber, and is made up of a side lip 21a, a grease lip 21b, and an intermediate lip 21c.

また、スリンガ１８は、内輪２に圧入される円筒部１８ａと、この円筒部１８ａから径方向外方に延びる立板部１８ｂとからなり、強磁性体の鋼鈑、例えば、フェライト系のステンレス鋼鈑（ＪＩＳ規格のＳＵＳ４３０系等）や防錆処理された冷間圧延鋼鈑（ＪＩＳ規格のＳＰＣＣ系等）からプレス加工によって断面略Ｌ字状に形成されている。そして、シール部材２１のサイドリップ２１ａが立板部１８ｂに摺接されると共に、グリースリップ２１ｂおよび中間リップ２１ｃが円筒部１８ａに摺接されている。なお、スリンガ１８における立板部１８ｂの外縁は、シール板１９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構成されている。   The slinger 18 includes a cylindrical portion 18a that is press-fitted into the inner ring 2 and a standing plate portion 18b that extends radially outward from the cylindrical portion 18a, and is formed of a ferromagnetic steel plate, for example, ferritic stainless steel. It is formed into a substantially L-shaped cross section by pressing from a steel plate (JIS standard SUS430 series or the like) or a rust-proof cold rolled steel plate (JIS standard SPCC system or the like). The side lip 21a of the seal member 21 is in sliding contact with the upright plate portion 18b, and the grease lip 21b and the intermediate lip 21c are in sliding contact with the cylindrical portion 18a. Note that the outer edge of the standing plate portion 18b of the slinger 18 faces the seal plate 19 through a slight radial clearance to form a labyrinth seal.

スリンガ１８における立板部１８ｂのインナー側の側面に、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２２が加硫接着等によって一体に接合されている。この磁気エンコーダ２２は、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。   A magnetic encoder 22 in which a magnetic substance powder such as ferrite is mixed in an elastomer such as rubber is integrally bonded to an inner side surface of the standing plate portion 18b of the slinger 18 by vulcanization adhesion or the like. The magnetic encoder 22 is magnetized with magnetic poles N and S alternately in the circumferential direction to constitute a rotary encoder for detecting the rotational speed of the wheel.

ここで、図４に示すように、カバー１６における底部１６ｃの径方向外方（路面から遠い側）の周方向一箇所に、この底部１６ｃからインナー側に突出して固定部２３が形成されている。そして、この固定部２３に矩形状の切欠き部（取付孔）２３ａと、この切欠き部２３ａの両側に固定孔２３ｂが形成され、後述する保持部１７が一体に結合される。なお、カバー１６の底部１６ｃにおける路面から最も近い側の周方向の一箇所に繭型形状のドレーン孔２４が穿設されている。このドレーン孔２４により、車両走行中に底部１６ｃ内に泥水や小石等の異物が入り込んだとしても容易に排出され、長時間に亘って滞留することはない。したがって、異物が車両停止時に固着して周辺部品に悪影響を及ぼすのを防止することができる。   Here, as shown in FIG. 4, a fixing portion 23 is formed to protrude from the bottom portion 16 c to the inner side at one place in the circumferential direction of the bottom portion 16 c of the cover 16 on the outer side in the radial direction (the side far from the road surface). . A rectangular notch (attachment hole) 23a is formed in the fixing part 23, and fixing holes 23b are formed on both sides of the notch 23a, and a holding part 17 described later is integrally coupled. Note that a bowl-shaped drain hole 24 is formed at one place in the circumferential direction closest to the road surface at the bottom 16c of the cover 16. By this drain hole 24, even if foreign matter such as muddy water or pebbles enters the bottom portion 16c during traveling of the vehicle, it is easily discharged and does not stay for a long time. Therefore, it is possible to prevent foreign matters from adhering when the vehicle is stopped and adversely affecting peripheral components.

図５は、図４に示すカバー１６の変形例である。このカバー２５の固定部２６は、底部１６ｃからインナー側に突出して形成され、矩形状の切欠き部２６ａと、この切欠き部２６ａの両側に固定孔２３ｂが形成されている。これにより、保持部１７の固定がし易くなり作業性が向上する。   FIG. 5 is a modification of the cover 16 shown in FIG. The fixing portion 26 of the cover 25 is formed so as to protrude from the bottom portion 16c toward the inner side, and a rectangular cutout portion 26a and fixing holes 23b are formed on both sides of the cutout portion 26a. Thereby, it becomes easy to fix the holding | maintenance part 17, and workability | operativity improves.

保持部１７は、ポリフェニレンサルファイド（ＰＰＳ）等の非磁性の特殊エーテル系合成樹脂材から射出成形によって形成され、さらにＧＦ（ガラスファイバー）等の強化材が添加されている。そして、この保持部１７に後述する回転速度センサ２８が包埋され、磁気エンコーダ２２に所定の軸方向すきま（エアギャップ）を介して対峙する。これにより、回転速度センサ２８の感知性能に悪影響を及ぼさず、また、耐食性に優れ、長期間に亘って強度・耐久性を向上させることができる。   The holding part 17 is formed by injection molding from a non-magnetic special ether-based synthetic resin material such as polyphenylene sulfide (PPS), and further a reinforcing material such as GF (glass fiber) is added. A rotation speed sensor 28 described later is embedded in the holding portion 17 and faces the magnetic encoder 22 via a predetermined axial clearance (air gap). As a result, the sensing performance of the rotation speed sensor 28 is not adversely affected, the corrosion resistance is excellent, and the strength and durability can be improved over a long period of time.

回転速度センサ２８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、および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素子とからなる。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、保持部１７は前述した材質以外にＰＡ（ポリアミド）６６、ＰＰＡ（ポリフタルアミド）、ＰＢＴ（ポリブチレンテレフタレート）等の射出成形可能な合成樹脂を例示することができる。   The rotational speed sensor 28 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 the magnetic flux, and a waveform shaping circuit that adjusts the output waveform of the magnetic detecting element. It consists of an IC element. Thereby, it is possible to detect the rotational speed with high reliability at low cost. In addition to the above-described materials, the holding portion 17 can be exemplified by synthetic resins that can be injection molded such as PA (polyamide) 66, PPA (polyphthalamide), PBT (polybutylene terephthalate).

また、図３に示すように、保持部１７からハーネス２７が垂直方向に延びている。これにより、ハーネス２７がナックルの外径側へ取り出し易くなって組立の作業性が向上すると共に、組立時に取り出したハーネス２７を折り曲げて結線する必要がなくなり、過度の曲げによるハーネス２７の内部配線への悪影響を防止することができ、信頼性を向上させることができる。   As shown in FIG. 3, the harness 27 extends from the holding portion 17 in the vertical direction. As a result, the harness 27 can be easily taken out to the outer diameter side of the knuckle and the workability of the assembly is improved, and it is not necessary to bend and connect the harness 27 taken out at the time of assembly. Adverse effects can be prevented, and reliability can be improved.

本実施形態では、図６に模式的に示すように、回転速度センサ２８を包埋する保持部１７は、磁気エンコーダ２２と所定の軸方向すきまＡ（エアギャップ）を介して対峙している。この軸方向すきまＡは、磁気エンコーダ２２の面振れおよび保持部１７の取付誤差を考慮して０．３〜２．０ｍｍの範囲に設定されている。また、回転速度センサ２８を構成するＩＣ素子は合成樹脂でモールドされているが、ここでは、表面から回転速度センサ２８を構成するＩＣ素子までのモールド厚さＢが０．１〜１．５ｍｍの範囲に設定されている。なお、０．１ｍｍ未満では、磁気エンコーダ２２の表面に異物が付着した場合、この異物でモールド部が摩耗して回転速度センサ２８を構成するＩＣ素子が露出する恐れがある。一方、モールド厚さが１．５ｍｍを超えると、磁気エンコーダ２２と回転速度センサ２８を構成するＩＣ素子との軸方向寸法Ｌ１が３．５ｍｍを超えることになり（Ｌ１＝０．４〜３．５ｍｍ）、これでは磁気エンコーダ２２の磁束密度が小さくなり、出力特性低下に繋がるため好ましくない。   In this embodiment, as schematically shown in FIG. 6, the holding unit 17 that embeds the rotational speed sensor 28 faces the magnetic encoder 22 via a predetermined axial clearance A (air gap). This axial clearance A is set in a range of 0.3 to 2.0 mm in consideration of surface deflection of the magnetic encoder 22 and mounting error of the holding portion 17. The IC element constituting the rotational speed sensor 28 is molded with a synthetic resin. Here, the mold thickness B from the surface to the IC element constituting the rotational speed sensor 28 is 0.1 to 1.5 mm. Set to range. If the thickness is less than 0.1 mm, when a foreign substance adheres to the surface of the magnetic encoder 22, the mold part may be worn by the foreign substance and the IC element constituting the rotation speed sensor 28 may be exposed. On the other hand, when the mold thickness exceeds 1.5 mm, the axial dimension L1 between the magnetic encoder 22 and the IC element constituting the rotation speed sensor 28 exceeds 3.5 mm (L1 = 0.4-3. 5 mm), which is not preferable because the magnetic flux density of the magnetic encoder 22 is reduced and the output characteristics are lowered.

図７は、図６の保持部１７の変形例である。この保持部３０は中央に凹み部３０ａを有している。そして、端面３０ｂが磁気エンコーダ２２と所定の軸方向すきまＣを介して対峙している。この軸方向すきまＣは、磁気エンコーダ２２の面振れおよび保持部３０の取付誤差を考慮して０．３〜１．０ｍｍの範囲に設定されている。また、回転速度センサ２８を構成するＩＣ素子は合成樹脂でモールドされ、凹み部３０ａの表面から回転速度センサ２８を構成するＩＣ素子までのモールド厚さＢが０．１〜１．５ｍｍの範囲に設定されている。また、凹み部３０ａの深さＤは０．１〜１．０ｍｍの範囲に設定されている。これにより、磁気エンコーダ２２の表面に異物が付着し、この異物で端面３０ｂが摩耗しても凹み部３０ａ部に及ぶのを抑制し、回転速度センサを構成するＩＣ素子が露出するのを防止することができる。なお、凹み部３０ａの深さＤが１．０ｍｍを超えると、磁気エンコーダ２２とＩＣ素子との軸方向寸法Ｌ２が３．５ｍｍを超えることになり（Ｌ２＝０．５〜３．５ｍｍ）、出力特性低下に繋がるので好ましくない。   FIG. 7 is a modification of the holding unit 17 of FIG. The holding portion 30 has a recessed portion 30a at the center. The end surface 30b faces the magnetic encoder 22 via a predetermined axial clearance C. The axial clearance C is set in a range of 0.3 to 1.0 mm in consideration of surface deflection of the magnetic encoder 22 and mounting error of the holding unit 30. The IC element constituting the rotational speed sensor 28 is molded with a synthetic resin, and the mold thickness B from the surface of the recess 30a to the IC element constituting the rotational speed sensor 28 is in the range of 0.1 to 1.5 mm. Is set. Moreover, the depth D of the recessed part 30a is set to the range of 0.1-1.0 mm. Thereby, even if a foreign substance adheres to the surface of the magnetic encoder 22 and the end surface 30b is worn by this foreign substance, it is prevented from reaching the recess 30a, and the IC element constituting the rotational speed sensor is prevented from being exposed. be able to. If the depth D of the recess 30a exceeds 1.0 mm, the axial dimension L2 between the magnetic encoder 22 and the IC element exceeds 3.5 mm (L2 = 0.5 to 3.5 mm). This is not preferable because it leads to a decrease in output characteristics.

なお、ここでは回転速度検出装置として、磁気エンコーダ２２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２８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。   Here, as an example of the rotational speed detection device, an active type rotational speed detection device including the magnetic encoder 22 and the rotational speed sensor 28 including a magnetic detection element such as a Hall element is illustrated. However, the rotational speed detection device according to the present invention is exemplified. The apparatus is not limited to this, and may be a passive type including, for example, a gear, a magnet, and an annular coil wound.

図８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の実施形態を示す縦断面図である。なお、この実施形態は、前述した実施形態と軸受部の構成が異なるだけで、その他同一部品同一部位あるいは同様の機能を有する部品や部位には同じ符号を付して詳細な説明を省略する。   FIG. 8: is a longitudinal cross-sectional view which shows 2nd Embodiment of the wheel bearing apparatus with a rotational speed detection apparatus concerning this invention. In this embodiment, only the configuration of the bearing portion is different from that of the above-described embodiment, and the same reference numerals are given to the same parts or parts having the same function, and detailed description thereof is omitted.

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４世代と称され、ハブ輪３１、およびこのハブ輪３１に内嵌された外側継手部材３２からなる内方部材３３と、この内方部材３３に複列の転動体４、４を介して外挿された外方部材５とを備えている。   This wheel bearing device with a rotational speed detecting device is called a fourth generation for driving wheels, and includes an inner member 33 including a hub wheel 31 and an outer joint member 32 fitted inside the hub wheel 31, The outer member 5 is provided on the outer member 33 via the double-row rolling elements 4 and 4.

ハブ輪３１は、アウター側の端部に車輪取付フランジ６を一体に有し、外周にアウター側の内側転走面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、内周に凹凸部３４が形成されている。この凹凸部３４はアヤメローレット状に形成され、旋削等により独立して形成された複数の環状溝と、ブローチ加工等により形成された複数の軸方向溝とを略直交させて構成した交叉溝、あるいは、互いに傾斜した螺旋溝で構成した交叉溝からなる。また、凹凸部３４は、良好な食い込み性を確保するためにその凸部の先端部が三角形状等の尖塔形状に形成されると共に、高周波焼入れによって硬化処理されている。   The hub wheel 31 integrally has a wheel mounting flange 6 at the outer end, an outer inner rolling surface 1a on the outer periphery, and a cylindrical small-diameter stepped portion extending in the axial direction from the inner rolling surface 1a. 1b is formed, and an uneven portion 34 is formed on the inner periphery. The concavo-convex portion 34 is formed in an iris knurl shape, a plurality of annular grooves formed independently by turning or the like, and a plurality of axial grooves formed by broaching or the like and a cross groove formed by substantially orthogonally crossing, Or it consists of the crossing groove | channel comprised by the helical groove | channel inclined mutually. Further, in order to ensure good bite, the concavo-convex portion 34 is formed with a tip of the convex portion in a spire shape such as a triangular shape, and is hardened by induction hardening.

ハブ輪３１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、車輪取付フランジ６のインナー側の基部６ｂから小径段部１ｂに亙って高周波焼入れによって表面硬さを５８〜６４ＨＲＣの範囲に硬化処理が施されている。   The hub wheel 31 is made of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and extends from the inner raceway surface 1a to the small diameter step portion 1b from the inner base portion 6b of the wheel mounting flange 6. Thus, the surface hardness is set to a range of 58 to 64 HRC by induction hardening.

等速自在継手３５は、外側継手部材３２と、継手内輪３６とケージ３７およびトルク伝達ボール３８とを備えている。外側継手部材３２は、カップ状をなすマウス部３９と、このマウス部３９の底部をなす肩部４０と、この肩部４０から軸方向に延びる中空状の軸部４１とを一体に有している。肩部４０の外周には、複列の外側転走面５ａ、５ａに対向するインナー側の内側転走面４０ａが形成されている。また、この軸部４１には、ハブ輪３１の小径段部１ｂに所定のシメシロを介して円筒嵌合するインロウ部４１ａと、このインロウ部４１ａの端部に嵌合部４１ｂが形成されている。   The constant velocity universal joint 35 includes an outer joint member 32, a joint inner ring 36, a cage 37, and a torque transmission ball 38. The outer joint member 32 integrally has a cup-shaped mouth portion 39, a shoulder portion 40 forming the bottom portion of the mouth portion 39, and a hollow shaft portion 41 extending from the shoulder portion 40 in the axial direction. Yes. On the outer periphery of the shoulder portion 40, an inner side inner rolling surface 40a facing the double row outer side rolling surfaces 5a, 5a is formed. The shaft portion 41 is formed with an inrow portion 41a that is cylindrically fitted to the small-diameter step portion 1b of the hub wheel 31 via a predetermined shimiro, and a fitting portion 41b is formed at an end portion of the inrow portion 41a. .

外側継手部材３２はＳ５３Ｃ等の炭素０．４０〜０．８０ｗｔ％を含む中高炭素鋼からなり、そして、インナー側のシール９のスリンガ１８が嵌合する肩部４０から内側転走面４０ａおよび軸部４１のインロウ部４１ａに亙って高周波焼入れによって表面硬さを５８〜６４ＨＲＣの範囲に所定の硬化層が形成されている。なお、嵌合部４１ｂは鍛造加工後の未焼入れ部とされている。なお、４２、４３は肩部４０とハブ輪３１に装着されたエンドキャップで、継手内部に封入された潤滑グリースの漏洩と、外部から継手内部に雨水やダスト等が侵入するのを防止している。   The outer joint member 32 is made of medium-high carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and the inner rolling surface 40a and the shaft from the shoulder 40 to which the slinger 18 of the inner seal 9 is fitted. A predetermined hardened layer having a surface hardness in the range of 58 to 64 HRC is formed by induction hardening over the in-row portion 41a of the portion 41. The fitting part 41b is an unquenched part after forging. Reference numerals 42 and 43 denote end caps attached to the shoulder 40 and the hub wheel 31 to prevent leakage of lubricating grease sealed inside the joint and prevent rainwater and dust from entering the joint from the outside. Yes.

ここで、ハブ輪３１の小径段部１ｂの端面に外側継手部材３２の肩部４０が衝合され、突合せ状態でハブ輪３１に軸部４１が内嵌されると共に、この軸部４１における嵌合部４１ｂの内径にマンドレル等の拡径治具を押し込んで嵌合部４１ｂを拡径し、この嵌合部４１ｂをハブ輪３１の凹凸部３４に食い込ませて加締める、所謂拡径加締により、ハブ輪３１と外側継手部材３２とが一体に塑性結合されている。   Here, the shoulder portion 40 of the outer joint member 32 is abutted against the end face of the small-diameter step portion 1b of the hub wheel 31, and the shaft portion 41 is internally fitted to the hub wheel 31 in the butted state. A diameter expansion jig such as a mandrel is pushed into the inner diameter of the joint portion 41b to expand the fitting portion 41b, and the fitting portion 41b is bitten into the concavo-convex portion 34 of the hub wheel 31 so as to be crimped. Thus, the hub wheel 31 and the outer joint member 32 are integrally plastically coupled.

本実施形態においても、カバー１６と、このカバー１６に結合された保持部１７とからなるセンサホルダ１５が外方部材５の端部に装着されると共に、カバー１６の底部１６ｃに固定部２３が形成され、保持部１７が一体に結合されている。そして、この保持部１７からハーネス２７が垂直方向に延びている。これにより、ハーネス２７がナックルの外径側へ取り出し易くなって組立の作業性が向上すると共に、組立時に取り出したハーネス２７を折り曲げて結線する必要がなくなり、過度の曲げによるハーネス２７の内部配線への悪影響を防止することができ、信頼性を向上させることができる。   Also in this embodiment, the sensor holder 15 including the cover 16 and the holding portion 17 coupled to the cover 16 is attached to the end portion of the outer member 5, and the fixing portion 23 is attached to the bottom portion 16 c of the cover 16. The holding portion 17 is integrally formed. A harness 27 extends from the holding portion 17 in the vertical direction. As a result, the harness 27 can be easily taken out to the outer diameter side of the knuckle and the workability of the assembly is improved, and it is not necessary to bend and connect the harness 27 taken out at the time of assembly. Adverse effects can be prevented, and reliability can be improved.

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

本発明に係る回転速度検出装置付き車輪用軸受装置は、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る第２乃至第４世代構造の車輪用軸受装置に適用することができる。   The wheel bearing device with a rotation speed detection device according to the present invention can be applied to wheel bearing devices of second to fourth generation structures in which all types of rotation speed detection devices are built in the inner ring rotation structure.

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である。1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device with a rotation speed detection device according to the present invention. 図１の検出部を示す要部拡大図である。It is a principal part enlarged view which shows the detection part of FIG. 図１の軸受部の側面図である。It is a side view of the bearing part of FIG. 本発明に係るカバーを示す正面図である。It is a front view which shows the cover which concerns on this invention. 図４のカバーの変形例を示す正面図である。It is a front view which shows the modification of the cover of FIG. 検出部を示す説明図である。It is explanatory drawing which shows a detection part. 図６の変形例を示す説明図である。It is explanatory drawing which shows the modification of FIG. 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の実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows 2nd Embodiment of the wheel bearing apparatus with a rotational speed detection apparatus which concerns on this invention. 従来の回転速度検出装置付き車輪用軸受装置を示す要部拡大図である。It is a principal part enlarged view which shows the conventional wheel bearing apparatus with a rotational speed detection apparatus. 他の従来の回転速度検出装置付き車輪用軸受装置を示す要部拡大図である。It is a principal part enlarged view which shows the other conventional wheel bearing apparatus with a rotational speed detection apparatus. 図１０のセンサホルダを示す斜視図である。It is a perspective view which shows the sensor holder of FIG.

符号の説明Explanation of symbols

１、３１・・・・・・・・・・・・ハブ輪
１ａ、２ａ、４０ａ・・・・・・・内側転走面
１ｂ・・・・・・・・・・・・・・小径段部
１ｃ、１３ａ・・・・・・・・・・セレーション
２・・・・・・・・・・・・・・・内輪
３、３３・・・・・・・・・・・・内方部材
４・・・・・・・・・・・・・・・転動体
５・・・・・・・・・・・・・・・外方部材
５ａ・・・・・・・・・・・・・・外側転走面
５ｂ・・・・・・・・・・・・・・車体取付フランジ
５ｃ・・・・・・・・・・・・・・外方部材の端面
６・・・・・・・・・・・・・・・車輪取付フランジ
６ａ・・・・・・・・・・・・・・ハブボルト
６ｂ・・・・・・・・・・・・・・基部
７・・・・・・・・・・・・・・・保持器
８・・・・・・・・・・・・・・・アウター側のシール
９・・・・・・・・・・・・・・・インナー側のシール
１０、３５・・・・・・・・・・・等速自在継手
１１、３２・・・・・・・・・・・外側継手部材
１２、４０・・・・・・・・・・・肩部
１３、４１・・・・・・・・・・・軸部
１３ｂ・・・・・・・・・・・・・雄ねじ
１４・・・・・・・・・・・・・・固定ナット
１５・・・・・・・・・・・・・・センサホルダ
１６・・・・・・・・・・・・・・カバー
１６ａ、４１ｂ・・・・・・・・・嵌合部
１６ｂ・・・・・・・・・・・・・鍔部
１６ｃ・・・・・・・・・・・・・底部
１７・・・・・・・・・・・・・・保持部
１８・・・・・・・・・・・・・・スリンガ
１８ａ・・・・・・・・・・・・・円筒部
１８ｂ・・・・・・・・・・・・・立板部
１９・・・・・・・・・・・・・・シール板
２０・・・・・・・・・・・・・・芯金
２１・・・・・・・・・・・・・・シール部材
２１ａ・・・・・・・・・・・・・サイドリップ
２１ｂ・・・・・・・・・・・・・グリースリップ
２１ｃ・・・・・・・・・・・・・中間リップ
２２・・・・・・・・・・・・・・磁気エンコーダ
２３、２６・・・・・・・・・・・固定部
２３ａ、２６ａ・・・・・・・・・切欠き部
２３ｂ・・・・・・・・・・・・・固定孔
２４・・・・・・・・・・・・・・ドレーン孔
２７・・・・・・・・・・・・・・ハーネス
２８・・・・・・・・・・・・・・回転速度センサ
３０ａ・・・・・・・・・・・・・凹み部
３０ｂ・・・・・・・・・・・・・端面
３４・・・・・・・・・・・・・・凹凸部
３６・・・・・・・・・・・・・・継手内輪
３７・・・・・・・・・・・・・・ケージ
３８・・・・・・・・・・・・・・トルク伝達ボール
３９・・・・・・・・・・・・・・マウス部
４１ａ・・・・・・・・・・・・・インロウ部
４２、４３・・・・・・・・・・・エンドキャップ
５０、６９・・・・・・・・・・・内輪
５１、７０・・・・・・・・・・・エンコーダ
５２、６７・・・・・・・・・・・外方部材
５２ａ・・・・・・・・・・・・・外方部材の端面
５３、６８・・・・・・・・・・・センサホルダ
５４・・・・・・・・・・・・・・回転速度センサ
５５、７１・・・・・・・・・・・カバー
５５ａ、７１ａ・・・・・・・・・嵌合部
５５ｂ、７１ｂ・・・・・・・・・鍔部
５５ｃ・・・・・・・・・・・・・底部
５６、７３・・・・・・・・・・・シール
５７・・・・・・・・・・・・・・スリンガ
５７ａ・・・・・・・・・・・・・円筒部
５７ｂ・・・・・・・・・・・・・立板部
５８・・・・・・・・・・・・・・シール板
５９・・・・・・・・・・・・・・芯金
６０・・・・・・・・・・・・・・シール部材
６０ａ・・・・・・・・・・・・・サイドリップ
６０ｂ・・・・・・・・・・・・・グリースリップ
６０ｃ・・・・・・・・・・・・・中間リップ
６１、７２・・・・・・・・・・・保持部
６２、７６・・・・・・・・・・・ハーネス
６３・・・・・・・・・・・・・・取出し口
６４・・・・・・・・・・・・・・外側継手部材
６５・・・・・・・・・・・・・・肩部
６６・・・・・・・・・・・・・・ナックル
７４・・・・・・・・・・・・・・端壁
７５・・・・・・・・・・・・・・透孔
Ａ、Ｃ・・・・・・・・・・・・・磁気エンコーダと回転速度センサとの軸方向すきま
Ｂ・・・・・・・・・・・・・・・モールド厚さ
Ｄ・・・・・・・・・・・・・・・凹み部の深さ
Ｌ１、Ｌ２・・・・・・・・・・・磁気エンコーダとＩＣ素子との軸方向寸法
α、β・・・・・・・・・・・・・傾斜角 1, 31 ..... Hub wheel 1a, 2a, 40a ... Inner rolling surface 1b ... Small diameter step Part 1c, 13a ... Serration 2 ... Inner ring 3, 33 ... Inner member 4 ... rolling element 5 ... outer member 5a ... · · Outer rolling surface 5b · · · · · · Body mounting flange 5c · · · · · · End surface 6 of the outer member ..... Wheel mounting flange 6a ..... hub bolt 6b ..... base 7 ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Retainer 8 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Sea of outer 9 ......... Inner side seal 10, 35 ... Constant velocity universal joints 11, 32 ...・ ・ Outer joint member 12, 40 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Shoulder portion 13, 41 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Shaft portion 13b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ Male screw 14 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Fixing nut 15 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Sensor holder 16 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・· Covers 16a, 41b ········· Fitting portion 16b ················································· ········································· Slinger 18a ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Standing plate 19 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ Seal plate 20 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Core 21 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Seal member 21a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ Side lip 21b ・ ・ ・ ・ ・ ・ ・ ・ Grease lip 21c ・ ・ ・ ・ ・ ・ ・ ・ Intermediate lip 22 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・Magnetic encoders 23, 26... Fixing portions 23a, 26a... ·············· Drain hole 27 ·············· Harness 28 30a ··········································· End edge 34 ···················· Uneven portion 36・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Fitting inner ring 37・ ・ ・ ・ ・ ・ ・ ・ ・ Cage 38 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Torque transmission ball 39 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Mouse 41a ······················································ End caps 50 and 69 ········· · · · · · · · · · · · · · · · · · · · · · · · · · · · · 52 68... Sensor holder 54... Rotational speed sensors 55 and 71... Covers 55 a and 71 a ·············· Fitting portion 55b, 71b ··········· 55c ···························································・ ・ ・ ・ ・ Seal 57 ・ ・ ・ ・ ・ ・······· Slinger 57a ························································ ··········· Seal plate 59 ····································································・ ・ ・ ・ ・ ・ Side lip 60b ・ ・ ・ ・ ・ ・ ・ ・ Grease lip 60c ・ ・ ・ ・ ・ ・ ・ ・ Intermediate lips 61, 72 ・ ・ ・ ・ ・ ・.... Holding parts 62, 76 ... Harness 63 ... Extraction port 64 ... ... outer joint member 65 ... shoulder 66 ... knuckle 74 ... .... End wall 75 ...... Through holes A, C ..... Axial clearance B between magnetic encoder and rotational speed sensor ..... Mold thickness D ... ····················································································· Depths L1, L2 ... Inclination angle

Claims (10)

外周に懸架装置に取り付けられるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、
一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に嵌合された内輪または等速自在継手の外側継手部材からなり、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、
この内方部材および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外周に圧入された円環状のカバー、およびこのカバーに結合され、回転速度センサが包埋された合成樹脂製の保持部からなる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、前記外方部材のインナー側の端部に内嵌され、鋼板からプレス加工により断面略Ｌ字状に形成された芯金、およびこの芯金に一体に接合されたシール部材からなる環状のシール板と、このシール板に対向して前記内方部材の外径に圧入され、鋼板からプレス加工により断面略Ｌ字状に形成されたスリンガとからなると共に、
このスリンガのインナー側の側面に、周方向に関する特性が交互にかつ等間隔に変化するエンコーダが接合され、このエンコーダが前記回転速度センサに所定の軸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、
前記カバーが、前記外方部材のインナー側の端部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、この鍔部からさらに径方向内方に延びる底部とを備え、
この底部の径方向外方の周方向一箇所に、当該底部からインナー側に突出して固定部が形成され、この固定部に切欠き部が形成されて前記保持部が前記カバーの嵌合部にまで回り込んで一体に結合されると共に、
この保持部のインナー側の側面が平坦に形成され、当該保持部からハーネスが垂直方向に延び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 to be attached to the suspension device on the outer periphery, and an outer rolling surface of a double row integrally formed on the inner periphery;
A hub wheel integrally having a wheel mounting flange for mounting a wheel at one end and having a small-diameter step portion extending in the axial direction on the outer periphery, and an inner ring or a constant speed fitted in the small-diameter step portion of the hub ring An inner member formed of an outer joint member of a universal joint, and formed with a double row inner rolling surface facing the double row outer rolling surface on the outer periphery;
A double row rolling element accommodated in a freely rolling manner 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;
An annular cover press-fitted into the outer periphery of the inner side end of the outer member, and a sensor holder that is coupled to the cover and includes a synthetic resin holding portion in which a rotation speed sensor is embedded;
Of the seals, an inner side seal is fitted into an inner side end of the outer member, and is formed by pressing a steel plate into a substantially L-shaped cross section, and integrally joined to the core. An annular seal plate made of a sealed member, and a slinger that is press-fitted into the outer diameter of the inner member facing the seal plate and formed into a substantially L-shaped section by pressing from a steel plate,
A rotation speed detecting device in which an encoder whose characteristics in the circumferential direction are alternately and equally spaced is joined to a side surface on the inner side of the slinger, and the encoder is opposed to the rotation speed sensor via a predetermined axial clearance. In the bearing device for wheel with
A cylindrical fitting portion in which the cover is press-fitted into an inner side end portion of the outer member, and a flange portion that extends radially inward from the fitting portion and is in close contact with the end surface of the outer member. And a bottom portion extending further radially inward from the flange portion,
A fixed portion is formed at one place in the circumferentially outer side of the bottom portion so as to protrude from the bottom portion toward the inner side, a notch portion is formed in the fixed portion, and the holding portion serves as a fitting portion of the cover. Wrap around to be united together,
A wheel bearing device with a rotational speed detecting device , wherein the inner side surface of the holding portion is formed flat, and a harness extends in a vertical direction from the holding portion . 前記エンコーダが、エラストマに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で構成されると共に、前記回転速度センサが、磁束の流れ方向に応じて特性を変化させる磁気検出素子、およびこの磁気検出素子の出力波形を整える波形成形回路が組み込まれたＩＣ素子を備えている請求項１に記載の回転速度検出装置付き車輪用軸受装置。   The encoder is composed of a magnetic encoder in which magnetic powder is mixed in an elastomer and magnetic poles N and S are alternately magnetized in the circumferential direction, and the rotational speed sensor has characteristics according to the flow direction of the magnetic flux. The wheel bearing device with a rotation speed detecting device according to claim 1, further comprising an IC element including a magnetic detecting element to be changed and a waveform shaping circuit for adjusting an output waveform of the magnetic detecting element. 前記磁気エンコーダと回転速度センサを包埋する前記保持部との軸方向すきまが０．３〜２．０ｍｍの範囲に設定されている請求項２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 rotational speed detection device according to claim 2, wherein an axial clearance between the magnetic encoder and the holding portion embedding the rotational speed sensor is set in a range of 0.3 to 2.0 mm. 前記ＩＣ素子が合成樹脂でモールドされ、このＩＣ素子から前記保持部の表面までのモールド厚さが０．１〜１．５ｍｍの範囲に設定されている請求項２または３に記載の回転速度検出装置付き車輪用軸受装置。   The rotational speed detection according to claim 2 or 3, wherein the IC element is molded with a synthetic resin, and a mold thickness from the IC element to the surface of the holding portion is set in a range of 0.1 to 1.5 mm. Wheel bearing device with device. 前記回転速度センサに凹み部が形成され、この凹み部に前記ＩＣ素子が合成樹脂でモールドされている請求項２乃至４いずれかに記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotation speed detection device according to claim 2, wherein a recess is formed in the rotation speed sensor, and the IC element is molded with a synthetic resin in the recess. 前記凹み部の深さが０．１〜１．０ｍｍの範囲に設定されている請求項５に記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotational speed detection device according to claim 5, wherein the depth of the recess is set in a range of 0.1 to 1.0 mm. 前記保持部の端面と前記磁気エンコーダとの軸方向すきまが０．３〜１．０ｍｍの範囲に設定されている請求項５または６に記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotational speed detection device according to claim 5 or 6, wherein an axial clearance between an end face of the holding portion and the magnetic encoder is set in a range of 0.3 to 1.0 mm. 前記底部の路面から最も近い側の周方向一箇所にドレーン孔が穿設されている請求項１乃至７いずれかに記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotation speed detecting device according to any one of claims 1 to 7, wherein a drain hole is bored at one place in a circumferential direction closest to the road surface of the bottom portion. 前記カバーが非磁性体のオーステナイト系ステンレス鋼鈑から形成されている請求項１乃至８いずれかに記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotational speed detection device according to any one of claims 1 to 8, wherein the cover is formed of a non-magnetic austenitic stainless steel plate. 前記保持部が非磁性のポリフェニレンサルファイドで形成されている請求項１乃至９いずれかに記載の回転速度検出装置付き車輪用軸受装置。
The wheel bearing device with a rotational speed detection device according to any one of claims 1 to 9, wherein the holding portion is formed of nonmagnetic polyphenylene sulfide.
JP2007317551A 2007-12-07 2007-12-07 Wheel bearing device with rotation speed detector Active JP5121429B2 (en)

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PCT/JP2008/003555 WO2009072266A1 (en) 2007-12-07 2008-12-02 Bearing device adapted for use in wheel and provided with rotational speed detector

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IT235948Y1 (en) * 1995-10-05 2000-07-18 Skf Ind Spa RELATIVE ROTATION SPEED DETECTION DEVICE BETWEEN THE RINGS OF A BEARING WITH A QUICK RELEASE AND RELEASE SYSTEM.
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FR2762907B1 (en) * 1997-05-02 1999-06-04 Roulements Soc Nouvelle DEVICE FOR MEASURING THE ROTATION OF A ROTATING ELEMENT
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JP4518970B2 (en) * 2005-01-26 2010-08-04 Ｎｔｎ株式会社 Abnormality detection method and detection device for bearing with rotation sensor
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