JP2012032329A - Wheel bearing device with rotation speed detector - Google Patents

Wheel bearing device with rotation speed detector Download PDF

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JP2012032329A
JP2012032329A JP2010173723A JP2010173723A JP2012032329A JP 2012032329 A JP2012032329 A JP 2012032329A JP 2010173723 A JP2010173723 A JP 2010173723A JP 2010173723 A JP2010173723 A JP 2010173723A JP 2012032329 A JP2012032329 A JP 2012032329A
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cover
wheel bearing
bearing device
mounting
ring
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Shogo Suzuki
昭吾 鈴木
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2010173723A priority Critical patent/JP2012032329A/en
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Abstract

PROBLEM TO BE SOLVED: To provide a wheel bearing device with a rotation speed detector in which a sealing property in a mounting part of a sensor unit is improved and a detection precision is improved.SOLUTION: A cover 9 is formed from an austenite stainless steel plate by pressing, and an insert hole 15 penetrating through in an axial direction is formed in a portion opposed with a pulsar ring 12 outside of a diameter direction of a bottom part 9d. A mounting part 15a is formed which is edged and protruded at an outer side, in the insert hole 15, and an O ring 17 is interposed between the mounting part 15a and a sensor unit 16 inserted into the mounting part 15a. A hole 18 is opened through in the axial direction in the vicinity of the insert hole 15, a bag nut 19 is fixed inside of the hole 18, a fixing bolt 21 is screwed to the bag nut 19, and the sensor unit 16 is fixed via a mounting flange part 20.

Description

本発明は、自動車等の車輪を懸架装置に対して回転自在に支承する車輪用軸受装置、特に、車輪の回転速度を検出する回転速度検出装置が内蔵され、センサユニットの装着部の密封性を高め、検出精度を向上させ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 for rotatably supporting a wheel of an automobile or the like with respect to a suspension device, in particular, a rotation speed detection device for detecting the rotation speed of the wheel is built in, and the sealing performance of the mounting portion of the sensor unit is improved. The present invention relates to a wheel bearing device with a rotational speed detection device that is enhanced and has improved detection accuracy.

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8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、図示しないナックルに支持固定され、固定部材となる外方部材51と、この外方部材51に複列のボール53、53を介して内挿された内方部材52とを有している。内方部材52は、ハブ輪55と、このハブ輪55に外嵌された内輪56とからなる。   A structure as shown in FIG. 8 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 knuckle (not shown), and is inserted into the outer member 51 serving as a fixing member and the outer member 51 via double rows of balls 53 and 53. And an inner member 52. The inner member 52 includes a hub ring 55 and an inner ring 56 that is externally fitted to the hub ring 55.

外方部材51は、外周に車体取付フランジ51bを一体に有し、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は内輪56の外周に形成されている。この内輪56は、ハブ輪55の内側転走面55aから軸方向に延びる軸状の小径段部55bに圧入されている。そして、複列のボール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。   The outer member 51 integrally has a vehicle body mounting flange 51b 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 the double row inner rolling surfaces 55 a and 56 a, one inner rolling surface 55 a is integrally formed on the outer periphery of the hub wheel 55, and the other inner rolling surface 56 a is formed on the outer periphery of the inner ring 56. The inner ring 56 is press-fitted into a shaft-shaped small-diameter step portion 55 b that extends in the axial direction from the inner rolling surface 55 a of the hub wheel 55. The double-row balls 53 and 53 are respectively accommodated between the rolling surfaces and are held by the cages 57 and 57 so as to be freely rollable.

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、小径段部55bの端部を径方向外方に塑性変形して加締部58が形成され、この加締部58によって内輪56が軸方向に固定されている。そして、外方部材51の端部にはシール59およびカバー63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 crimped portion 58 is formed by plastically deforming the end portion of the small diameter step portion 55b radially outward. The inner ring 56 is fixed in the axial direction by the caulking portion 58. A seal 59 and a cover 63 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, or the like from the outside into the bearing. .

内輪56の外周には磁気エンコーダ60が圧入されている。この磁気エンコーダ60は、磁性金属板により断面が略T字状の円環状に形成された支持環61と、この支持環61の側面に添着されたエンコーダ本体62とで構成されている。このエンコーダ本体62は、フェライトの粉末を混入させたゴム等の永久磁石からなり、円周方向にS極とN極とが交互に等間隔に着磁されている。   A magnetic encoder 60 is press-fitted into the outer periphery of the inner ring 56. The magnetic encoder 60 includes a support ring 61 that is formed in a ring shape having a substantially T-shaped cross section by a magnetic metal plate, and an encoder body 62 that is attached to a side surface of the support ring 61. The encoder body 62 is made of a permanent magnet such as rubber mixed with ferrite powder, and S poles and N poles are alternately magnetized at equal intervals in the circumferential direction.

カバー63は外方部材51の開口端部に外嵌固定され、外方部材51の開口部を閉塞している。このカバー63は、有底円筒状の主部64と、この主部64の開口周縁部から径方向外方へ突出する状態で設けられた、断面L字状のフランジ部65とからなる。また、このフランジ部65は、外方部材51の内端開口部に突き当て自在な形状を有する突き当て部66と、外方部材51の開口部に外嵌自在な形状を有する嵌合部67とからなる。   The cover 63 is fitted and fixed to the opening end of the outer member 51 and closes the opening of the outer member 51. The cover 63 includes a bottomed cylindrical main portion 64 and a flange portion 65 having an L-shaped cross section provided so as to protrude radially outward from an opening peripheral edge of the main portion 64. The flange portion 65 has a butting portion 66 having a shape that can be abutted against the inner end opening of the outer member 51, and a fitting portion 67 having a shape that can be freely fitted to the opening of the outer member 51. It consists of.

主部64の中央部分を構成する底板部68の径方向外方に片寄った部分には、軸方向に突出する突部69が設けられている。また、この突部69の外周壁部の一部は、底板部68の外周面よりも径方向外方に突出させて、フランジ部65を構成する嵌合部67の外周面と連続する膨出部70とされている。したがって、この部分でフランジ部65の突き当て部66は不連続となっている。   A projecting portion 69 protruding in the axial direction is provided at a portion of the bottom plate portion 68 constituting the central portion of the main portion 64 that is offset outward in the radial direction. Further, a part of the outer peripheral wall portion of the projecting portion 69 protrudes radially outward from the outer peripheral surface of the bottom plate portion 68, and bulges that are continuous with the outer peripheral surface of the fitting portion 67 constituting the flange portion 65. Part 70. Therefore, the abutting portion 66 of the flange portion 65 is discontinuous at this portion.

また、突部69の底板部68の径方向外方寄り部分で、エンコーダ本体62と対向する部分には、軸方向に貫通する挿入孔71が形成されている。この挿入孔71はバーリング加工によって形成されると共に、このバーリング加工に伴って形成される短円筒部72にセンサユニット73の挿入部74が挿入されている。このセンサユニット73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からなるセンサおよびこの磁気検出素子の出力波形を整える波形整形回路が組み込まれたIC等からなり、車輪の回転速度を検出してその回転数を制御する自動車のABSを構成している。   In addition, an insertion hole 71 penetrating in the axial direction is formed in a portion facing the encoder main body 62 in a radially outward portion of the bottom plate portion 68 of the protrusion 69. The insertion hole 71 is formed by burring, and the insertion portion 74 of the sensor unit 73 is inserted into a short cylindrical portion 72 formed along with the burring. This sensor unit 73 incorporates a sensor composed of a magnetic detection element whose characteristics change according to the flow direction of magnetic flux, such as a Hall element, a magnetoresistive element (MR element), and a waveform shaping circuit for adjusting the output waveform of the magnetic detection element. The automobile ABS is configured to detect the rotational speed of the wheel and control the rotational speed.

挿入部74の中間部外周面には係止溝75が形成され、この係止溝75にOリング76が装着されている。このOリング76によって泥水等の異物が挿入孔71を通じてカバー63および外方部材51の内側に侵入するのを防止している。そして、磁性粉等の異物がエンコーダ本体62の側面に付着するのを防止し、回転速度検出の精度が悪化するのを防止している。   A locking groove 75 is formed on the outer peripheral surface of the intermediate portion of the insertion portion 74, and an O-ring 76 is attached to the locking groove 75. The O-ring 76 prevents foreign matter such as muddy water from entering the cover 63 and the outer member 51 through the insertion hole 71. And it prevents that foreign materials, such as magnetic powder, adhere to the side surface of the encoder main body 62, and prevents that the precision of a rotational speed detection deteriorates.

また、カバー63における突部69の端面の径方向中央寄り付近で、ハブ輪55の小径段部55bに存在する凹部77と対向する部分には、軸方向に貫通しない有底の段付凹部78が設けられている。この段付凹部78は、開口側の大径部79と奥側の小径部80とからなり、大径部79にはナット81が溶接により固定されている。   In addition, a bottomed stepped concave portion 78 that does not penetrate in the axial direction is formed in a portion facing the concave portion 77 present in the small diameter step portion 55b of the hub wheel 55 near the center in the radial direction of the end surface of the protrusion 69 in the cover 63. Is provided. The stepped recess 78 includes a large-diameter portion 79 on the opening side and a small-diameter portion 80 on the back side, and a nut 81 is fixed to the large-diameter portion 79 by welding.

取付フランジ部82に設けられた通孔83の内側に、円筒状の芯金84がインサートされている。この芯金84の全長は、取付フランジ部82の厚さとほぼ同等に設定されている。そして、取付フランジ部82を介してボルト85とナット81とを螺合緊締した際に、ボルト85の頭部とナット81によって合成樹脂製の取付フランジ部82が押し潰されないようにされている。   A cylindrical cored bar 84 is inserted inside a through hole 83 provided in the mounting flange portion 82. The total length of the cored bar 84 is set to be approximately equal to the thickness of the mounting flange portion 82. When the bolt 85 and the nut 81 are screwed and tightened via the mounting flange portion 82, the mounting flange portion 82 made of synthetic resin is prevented from being crushed by the head portion of the bolt 85 and the nut 81.

前述のように構成する従来の回転速度検出装置付き車輪用軸受装置によれば、センサユニット73をカバー63に対し、ねじ止め結合固定する構造を採用しているため、センサユニット73の修理、交換の手間を軽減することができ、ねじ止め結合部分での密封性の確保を安価に実現できると共に、カバー63に対するセンサユニット73の組み付け作業性を向上できる(例えば、特許文献1参照。)。   According to the conventional wheel bearing device with a rotational speed detection device configured as described above, the sensor unit 73 is fixed to the cover 63 by screwing and fixing, so that the sensor unit 73 is repaired or replaced. Thus, it is possible to reduce the trouble of securing the sealing unit at the screwed joint portion at low cost and improve the workability of assembling the sensor unit 73 to the cover 63 (see, for example, Patent Document 1).

特開2006−337381号公報Japanese Patent Laid-Open No. 2006-337381

このような従来の回転速度検出装置付き車輪用軸受装置において、カバー63における突部69の端面に有底の段付凹部78が設けられ、この段付凹部78の大径部79にナット81が溶接により固定されると共に、取付フランジ部82に設けられた通孔83の内側に円筒状の芯金84が一体にモールドされているが、この場合、挿入孔71とセンサの挿入部74の隙間が大きいと、ナット81と芯金84の芯ズレが大きくなりやすく、センサユニット73の組み付け作業が難しくなる。さらに、カバー63の形状が複雑なため金型の製作が難しくなると共に、加工工数が嵩んで製造コストが高騰する。   In such a conventional wheel bearing device with a rotational speed detection device, a bottomed stepped recess 78 is provided on the end surface of the protrusion 69 of the cover 63, and a nut 81 is provided on the large diameter portion 79 of the stepped recess 78. While being fixed by welding, a cylindrical cored bar 84 is integrally molded inside a through hole 83 provided in the mounting flange portion 82. In this case, a gap between the insertion hole 71 and the sensor insertion portion 74 is formed. Is large, the misalignment between the nut 81 and the cored bar 84 tends to increase, and the assembly work of the sensor unit 73 becomes difficult. Furthermore, since the shape of the cover 63 is complicated, it becomes difficult to manufacture the mold, and the number of processing steps increases, resulting in a high manufacturing cost.

本発明は、このような従来の問題に鑑みてなされたもので、センサユニットの装着部の密封性を高め、検出精度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する。   The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a wheel bearing device with a rotational speed detection device that improves the sealing performance of the mounting portion of the sensor unit and improves the detection accuracy. And

係る目的を達成すべく、本発明のうち請求項1に記載の発明は、内周に複列の外側転走面が一体に形成された外方部材と、一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪とからなり、外周に前記複列の外側転走面に対向する複列の内側転走面が形成された内方部材と、前記外方部材と内方部材のそれぞれの転走面間に転動自在に収容された複列の転動体と、前記内輪に外嵌され、円周方向に特性を交互に、かつ等間隔に変化させたパルサリングと、前記外方部材に嵌着されたカバーに装着されて前記パルサリングに所定のエアギャップを介して対峙する棒状のセンサユニットとを備え、前記カバーが鋼鈑からプレス加工にて形成され、前記外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向外方に延び、前記外方部材のインナー側の端面に密着する重合部と、この重合部から軸方向に延びる円筒部と、前記外方部材の開口部を閉塞する底部とを備えている回転速度検出装置付き車輪用軸受装置において、前記カバーの底部の径方向外方部で、前記パルサリングと対向する部分に、軸方向に貫通する挿入孔が形成され、この挿入孔に縁曲げされてアウター側に突出する装着部が形成され、この装着部と、この装着部に嵌挿される前記センサユニットとの間に弾性部材が介装されると共に、前記挿入孔の近傍に軸方向に貫通する通孔が穿設され、この通孔の内側に袋ナットが固定され、この袋ナットに固定ボルトが螺着されて前記センサユニットが取付フランジ部を介して固定されている。   In order to achieve such an object, the invention according to claim 1 of the present invention includes an outer member in which a double row outer rolling surface is integrally formed on the inner periphery, and a wheel for attaching a wheel to one end. A hub ring integrally having a mounting flange and formed with a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub ring. An inner member in which a double row of inner rolling surfaces facing the outer rolling surface is formed, and a double row of rolling members housed between the outer member and the inner member so as to roll freely. A moving body, a pulsar ring that is externally fitted to the inner ring and whose characteristics are alternately changed at equal intervals in the circumferential direction, and a predetermined air gap that is attached to the cover that is fitted to the outer member. A bar-shaped sensor unit facing each other, and the cover is a steel plate. A cylindrical fitting portion that is formed by press working and is press-fitted into the inner periphery of the end portion of the outer member, and extends radially outward from the fitting portion to the inner end surface of the outer member. In a wheel bearing device with a rotational speed detecting device, comprising: a superposed portion that is in close contact; a cylindrical portion that extends in an axial direction from the superposed portion; and a bottom portion that closes the opening of the outer member. An insertion hole penetrating in the axial direction is formed in a portion facing the pulsar ring in a radially outer portion, and a mounting portion that is edge-bent to the insertion hole and protrudes to the outer side is formed. An elastic member is interposed between the sensor unit and the sensor unit, and a through hole penetrating in the axial direction is formed in the vicinity of the insertion hole. A cap nut is formed inside the through hole. The fixing bolt is screwed onto this cap nut. Wherein the sensor unit is fixed via the mounting flange portion.

このように、内輪に外嵌され、円周方向に特性を交互に、かつ等間隔に変化させたパルサリングと、外方部材に嵌着されたカバーに装着されてパルサリングに所定のエアギャップを介して対峙する棒状のセンサユニットとを備え、カバーが鋼鈑からプレス加工にて形成され、外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向外方に延び、外方部材のインナー側の端面に密着する重合部と、この重合部から軸方向に延びる円筒部と、外方部材の開口部を閉塞する底部とを備えている回転速度検出装置付き車輪用軸受装置において、カバーの底部の径方向外方部で、パルサリングと対向する部分に、軸方向に貫通する挿入孔され、この挿入孔に縁曲げされてアウター側に突出する装着部が形成され、この装着部と、この装着部に嵌挿されるセンサユニットとの間に弾性部材が介装されると共に、挿入孔の近傍に軸方向に貫通する通孔が穿設され、この通孔の内側に袋ナットが固定され、この袋ナットに固定ボルトが螺着されてセンサユニットが取付フランジ部を介して固定されているので、装着部の剛性が向上し、センサユニットを安定して支持することができると共に、密封性が向上して外部から泥水等の異物の侵入を確実に防止することができる。さらに、カバーの密封性が向上することにより、インナー側の密封手段となるシールが不要となり、パルサリングでも充分シール効果を発揮し、軸受内部に封入された潤滑グリースがカバー側に漏洩するのを効果的に防止することができる。したがって、製造コストを最小限に抑えることができると共に、軸受の回転トルクを低減することができる。   In this way, a pulsar ring that is externally fitted to the inner ring and whose characteristics are alternately changed at equal intervals in the circumferential direction, and a cover that is fitted to the outer member are attached to the pulsar ring via a predetermined air gap. A cylindrical sensor that is pressed from the steel plate and press-fitted into the inner periphery of the end of the outer member. Rotational speed detection device comprising a superposed portion that extends in the direction and closely contacts an inner end face of the outer member, a cylindrical portion that extends in the axial direction from the superposed portion, and a bottom portion that closes the opening of the outer member. In the attached wheel bearing device, an insertion hole penetrating in the axial direction is formed in a portion facing the pulsar ring at a radially outer portion of the bottom portion of the cover, and a mounting portion which is bent at the insertion hole and protrudes to the outer side is provided. Formed and this mounting part and this An elastic member is interposed between the sensor unit and the sensor unit, and a through hole penetrating in the axial direction is formed in the vicinity of the insertion hole, and a cap nut is fixed inside the through hole. Since the fixing bolt is screwed onto the cap nut and the sensor unit is fixed via the mounting flange portion, the rigidity of the mounting portion is improved, the sensor unit can be stably supported, and the sealing performance is improved. It is possible to improve and prevent foreign matter such as muddy water from entering from outside. Furthermore, the improved sealability of the cover eliminates the need for a seal that serves as a sealing means on the inner side, and even a pulsar ring can provide a sufficient sealing effect, effectively preventing the lubricating grease sealed inside the bearing from leaking to the cover side. Can be prevented. Therefore, the manufacturing cost can be minimized and the rotational torque of the bearing can be reduced.

また、請求項2に記載の発明のように、前記弾性部材がOリングであっても良い。   Further, as in a second aspect of the present invention, the elastic member may be an O-ring.

また、請求項3に記載の発明のように、前記装着部が円筒状に形成されていれば、センサユニットの挿入性を向上させ、装着部の密封性を高めることができる。   Moreover, if the said mounting part is formed in the cylindrical shape like invention of Claim 3, the insertability of a sensor unit can be improved and the sealing performance of a mounting part can be improved.

また、請求項4に記載の発明のように、前記装着部の端部に内側に折曲される鍔部が形成され、この鍔部に前記弾性部材が保持されていれば、鍔部に弾性部材が安定して保持することができ、組立工数を軽減することができると共に、センサユニットの組立性が向上する。   Further, as in the invention described in claim 4, if a flange portion that is bent inward is formed at an end portion of the mounting portion, and the elastic member is held by the flange portion, the flange portion is elastic. The member can be stably held, the number of assembling steps can be reduced, and the assembling property of the sensor unit is improved.

また、請求項5に記載の発明のように、前記装着部が傾斜した内周面に形成され、この内周面に前記弾性部材が保持されていれば、カバーの加工性が向上し、簡単な構造で弾性部材を安定して保持することができる。   Further, if the mounting portion is formed on the inclined inner peripheral surface and the elastic member is held on the inner peripheral surface as in the invention described in claim 5, the processability of the cover is improved, and it is simple. The elastic member can be stably held with a simple structure.

また、請求項6に記載の発明のように、前記装着部の根元部が円弧状の段付き形状に形成され、この根元部に前記弾性部材が弾性接触されていても良いし、また、請求項7に記載の発明のように、前記装着部の根元部が円筒状の段付き形状に形成され、この根元部に前記弾性部材が弾性接触されていても良い。これにより、挿入孔の入口径が実質的に大きくなり、センサユニットの挿入性を向上させると共に、センサユニットの挿入部に環状溝を形成してOリングを装着することなく装着部の密封性を向上させることができ、低コスト化を図ることができる。   In addition, as in the invention described in claim 6, the root portion of the mounting portion may be formed in an arc-shaped stepped shape, and the elastic member may be elastically contacted with the root portion. As in the invention described in Item 7, the root portion of the mounting portion may be formed in a cylindrical stepped shape, and the elastic member may be in elastic contact with the root portion. This substantially increases the inlet diameter of the insertion hole, improves the insertability of the sensor unit, and forms an annular groove in the insertion portion of the sensor unit to improve the sealing performance of the attachment portion without attaching an O-ring. The cost can be reduced.

また、請求項8に記載の発明のように、前記装着部の案内すきまが1.0mm以下に規制され、かつ、装着部の案内部の幅寸法が1.0mm以上に設定されていれば、センサユニットの挿入性を向上させ、装着部の密封性を高めることができると共に、取付フランジ部のボルト孔とカバーの通孔との芯合せが容易となる。   Further, as in the invention described in claim 8, if the guide clearance of the mounting portion is regulated to 1.0 mm or less and the width dimension of the guide portion of the mounting portion is set to 1.0 mm or more, The insertion property of the sensor unit can be improved, the sealing performance of the mounting portion can be improved, and the centering of the bolt hole of the mounting flange portion and the through hole of the cover is facilitated.

また、請求項9に記載の発明のように、前記カバーの嵌合部の端部が薄肉に形成され、この端部に弾性部材が加硫接着により端部に回り込んだ状態で一体に接合され、前記外方部材の端部内周に弾性嵌合されていれば、外方部材との嵌合部の気密性が向上する。   Further, as in the invention according to claim 9, the end portion of the fitting portion of the cover is formed to be thin, and an elastic member is joined to the end portion integrally with the end portion by vulcanization adhesion. If it is elastically fitted to the inner periphery of the end portion of the outer member, the airtightness of the fitting portion with the outer member is improved.

また、請求項10に記載の発明のように、前記カバーの嵌合部の板厚は他の部位よりも厚く形成されていれば、カバー自体の剛性が高くなって気密性が一層向上する。   Moreover, if the plate | board thickness of the fitting part of the said cover is thicker than the other site | part like the invention of Claim 10, the rigidity of cover itself will become high and airtightness will improve further.

また、請求項11に記載の発明のように、前記カバーの嵌合部の端部に径方向外方に突出する環状凸部が形成されると共に、前記外方部材の端部内周に環状溝が形成され、この環状溝に前記環状凸部が係合されていれば、外方部材との嵌合部の気密性が向上すると共に、車両の運転中に振動等によりカバーが微動するのを防止し、長期間に亘って安定した検出精度を確保することができる。   Further, as in the invention described in claim 11, an annular convex portion projecting radially outward is formed at an end portion of the fitting portion of the cover, and an annular groove is formed at the inner periphery of the end portion of the outer member. If the annular convex portion is engaged with the annular groove, the airtightness of the fitting portion with the outer member is improved, and the cover is finely moved by vibration or the like during the operation of the vehicle. And stable detection accuracy can be ensured over a long period of time.

また、請求項12に記載の発明のように、前記カバーがオーステナイト系ステンレス鋼鈑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、安定した検出精度を確保することができる。   In addition, as in the invention described in claim 12, if the cover is formed of an austenitic stainless steel plate, the detection performance of the rotation speed sensor is not adversely affected, and stable detection accuracy can be ensured. .

また、請求項13に記載の発明のように、前記カバーが冷間圧延鋼板にカチオン電着塗装により防錆皮膜が形成されていれば、長期間に亘って発錆するのを防止することができると共に、外方部材との嵌合部の気密性が向上する。   Further, as in the invention described in claim 13, if the rust preventive film is formed on the cold rolled steel sheet by cationic electrodeposition coating, the cover can prevent rusting over a long period of time. In addition, the airtightness of the fitting portion with the outer member is improved.

本発明に係る回転速度検出装置付き車輪用軸受装置は、内周に複列の外側転走面が一体に形成された外方部材と、一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪とからなり、外周に前記複列の外側転走面に対向する複列の内側転走面が形成された内方部材と、前記外方部材と内方部材のそれぞれの転走面間に転動自在に収容された複列の転動体と、前記内輪に外嵌され、円周方向に特性を交互に、かつ等間隔に変化させたパルサリングと、前記外方部材に嵌着されたカバーに装着されて前記パルサリングに所定のエアギャップを介して対峙する棒状のセンサユニットとを備え、前記カバーが鋼鈑からプレス加工にて形成され、前記外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向外方に延び、前記外方部材のインナー側の端面に密着する重合部と、この重合部から軸方向に延びる円筒部と、前記外方部材の開口部を閉塞する底部とを備えている回転速度検出装置付き車輪用軸受装置において、前記カバーの底部の径方向外方部で、前記パルサリングと対向する部分に、軸方向に貫通する挿入孔が形成され、この挿入孔に縁曲げされてアウター側に突出する装着部が形成され、この装着部と、この装着部に嵌挿される前記センサユニットとの間に弾性部材が介装されると共に、前記挿入孔の近傍に軸方向に貫通する通孔が穿設され、この通孔の内側に袋ナットが固定され、この袋ナットに固定ボルトが螺着されて前記センサユニットが取付フランジ部を介して固定されているので、装着部の剛性が向上し、センサユニットを安定して支持することができると共に、密封性が向上して外部から泥水等の異物の侵入を確実に防止することができる。さらに、カバーの密封性が向上することにより、インナー側の密封手段となるシールが不要となり、パルサリングでも充分シール効果を発揮し、軸受内部に封入された潤滑グリースがカバー側に漏洩するのを効果的に防止することができる。したがって、製造コストを最小限に抑えることができると共に、軸受の回転トルクを低減することができる。   The wheel bearing device with a rotational speed detection device according to the present invention is integrally formed with an outer member in which a double row outer rolling surface is integrally formed on the inner periphery and a wheel mounting flange for mounting a wheel on one end. And a hub ring formed with a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub ring. An inner member in which opposing double-row inner rolling surfaces are formed, a double-row rolling element housed in a freely rolling manner between the respective rolling surfaces of the outer member and the inner member, and the inner ring And a pulsar ring whose characteristics are alternately changed at equal intervals in the circumferential direction, and a cover which is fitted to the outer member, and is opposed to the pulsar ring via a predetermined air gap. A rod-shaped sensor unit, and the cover is A cylindrical fitting portion formed by machining and press-fitted into the inner periphery of the end portion of the outer member, and extends radially outward from the fitting portion, and is in close contact with the inner end surface of the outer member. In a wheel bearing device with a rotational speed detection device, comprising: a superposition part; a cylindrical part extending in the axial direction from the superposition part; and a bottom part that closes the opening part of the outer member, the radial direction of the bottom part of the cover An insertion hole penetrating in the axial direction is formed in a portion facing the pulsar ring at the outer portion, and a mounting portion that is bent at the insertion hole and protrudes to the outer side is formed. An elastic member is interposed between the sensor unit and the sensor unit, and a through hole penetrating in the axial direction is formed in the vicinity of the insertion hole, and a cap nut is fixed inside the through hole. A fixing bolt is screwed onto this cap nut to Since the unit is fixed via the mounting flange, the rigidity of the mounting part is improved and the sensor unit can be supported stably, and the sealing performance is improved and foreign matter such as muddy water enters from the outside. Can be reliably prevented. Furthermore, the improved sealability of the cover eliminates the need for a seal that serves as a sealing means on the inner side, and even a pulsar ring can provide a sufficient sealing effect, effectively preventing the lubricating grease sealed inside the bearing from leaking to the cover side. Can be prevented. Therefore, the manufacturing cost can be minimized and the rotational torque of the bearing can be reduced.

本発明に係る回転速度検出装置付き車輪用軸受装置の一実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows one Embodiment of the wheel bearing apparatus with a rotational speed detection apparatus which concerns on this invention. 図1のセンサ装着部を示す要部拡大図である。It is a principal part enlarged view which shows the sensor mounting part of FIG. 図2のカバーの変形例を示す要部拡大図である。It is a principal part enlarged view which shows the modification of the cover of FIG. 図2のカバーの他の変形例を示す要部拡大図である。It is a principal part enlarged view which shows the other modification of the cover of FIG. 図2のカバーの他の変形例を示す要部拡大図である。It is a principal part enlarged view which shows the other modification of the cover of FIG. 図2のカバーの他の変形例を示す要部拡大図である。It is a principal part enlarged view which shows the other modification of the cover of FIG. (a)は、図6のカバーの変形例を示す要部拡大図、(b)は、(a)の変形例を示す要部拡大図である。(A) is a principal part enlarged view which shows the modification of the cover of FIG. 6, (b) is a principal part enlarged view which shows the modification of (a). 従来の回転速度検出装置付き車輪用軸受装置を示す縦断面図である。It is a longitudinal cross-sectional view which shows the conventional wheel bearing apparatus with a rotational speed detection apparatus.

外周に懸架装置を構成する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軸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、前記外方部材と内方部材のそれぞれの転走面間に転動自在に収容された複列の転動体と、前記内輪に外嵌され、円周方向に特性を交互に、かつ等間隔に変化させたパルサリングと、前記外方部材に装着され、前記パルサリングに所定のエアギャップを介して対峙する棒状のセンサユニットとを備え、前記カバーが鋼鈑からプレス加工にて形成され、前記外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向外方に延び、前記外方部材のインナー側の端面に密着する重合部と、この重合部から軸方向に延びる円筒部と、前記外方部材の開口部を閉塞する底部とを備えている回転速度検出装置付き車輪用軸受装置において、前記カバーがオーステナイト系ステンレス鋼鈑で形成され、前記底部の径方向外方部で、前記パルサリングと対向する部分に、軸方向に貫通する挿入孔が形成され、この挿入孔に縁曲げされてアウター側に突出する装着部が形成され、この装着部と、この装着部に嵌挿される前記センサユニットとの間にOリングが介装されると共に、前記挿入孔の近傍に軸方向に貫通する通孔が穿設され、この通孔の内側に袋ナットが固定され、この袋ナットに固定ボルトが螺着されて前記センサユニットが取付フランジ部を介して固定されている。   An outer member that integrally has a vehicle body mounting flange to be attached to a knuckle constituting a suspension device on the outer periphery, and an outer member in which a double row outer rolling surface is integrally formed on the inner periphery, and a wheel on one end And an inner rolling surface facing one of the outer rolling surfaces of the double row, and an axial small-diameter step portion extending in the axial direction from the inner rolling surface. And an inner member comprising an inner ring press-fitted into a small-diameter step portion of the hub ring and having an inner race surface facing the other of the outer race surfaces of the double row on the outer periphery, The double row rolling elements housed in a freely rolling manner between the rolling surfaces of the member and the inner member, and the outer ring are fitted onto the inner ring, and the characteristics are changed alternately and at equal intervals in the circumferential direction. A pulsar ring and a predetermined air gap mounted on the outer member and in the pulsar ring A rod-shaped sensor unit facing each other, the cover is formed by pressing from a steel plate, and is fitted into a cylindrical fitting portion that is press-fitted into the inner periphery of the end portion of the outer member. A superposed portion that extends radially outward and is in close contact with an inner end face of the outer member, a cylindrical portion that extends in the axial direction from the superposed portion, and a bottom portion that closes the opening of the outer member. In the wheel bearing device with a rotational speed detection device, the cover is formed of an austenitic stainless steel rod, and an insertion hole penetrating in the axial direction is formed in a portion facing the pulsar ring at a radially outward portion of the bottom portion. A mounting portion that is formed and bent at the insertion hole and protrudes to the outer side is formed, and an O-ring is interposed between the mounting portion and the sensor unit that is inserted into the mounting portion, Of the insertion hole A through-hole penetrating in the axial direction is drilled on the side, a cap nut is fixed inside the through-hole, and a fixing bolt is screwed onto the cap nut so that the sensor unit is fixed via a mounting flange portion. Yes.

以下、本発明の実施の形態を図面に基づいて詳細に説明する。
図1は、本発明に係る回転速度検出装置付き車輪用軸受装置の一実施形態を示す縦断面図、図2は、図1のセンサ装着部を示す要部拡大図、図3は、図2のカバーの変形例を示す要部拡大図、図4〜6は、図2のカバーの他の変形例を示す要部拡大図、図7(a)は、図6のカバーの変形例を示す要部拡大図、(b)は、(a)の変形例を示す要部拡大図である。なお、以下の説明では、車両に組み付けた状態で車両の外側寄りとなる側をアウター側(図1の左側)、中央寄り側をインナー側(図1の右側)という。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a longitudinal sectional view showing an embodiment of a wheel bearing device with a rotational speed detection device according to the present invention, FIG. 2 is an enlarged view of a main part showing a sensor mounting portion of FIG. 1, and FIG. FIG. 4 to FIG. 6 are main part enlarged views showing other modified examples of the cover of FIG. 2, and FIG. 7A shows a modified example of the cover of FIG. The principal part enlarged view and (b) are principal part enlarged views which show the modification of (a). In the following description, the side closer to the outer side of the vehicle when assembled to the vehicle is referred to as the outer side (left side in FIG. 1), and the side closer to the center is referred to as the inner side (right side in FIG. 1).

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

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

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

ハブ輪4はS53C等の炭素0.40〜0.80wt%を含む中高炭素鋼で形成され、内側転走面4aをはじめ、後述するシール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4bに亙って高周波焼入れによって表面硬さを58〜64HRCの範囲に硬化処理されている。なお、加締部4cは、鍛造後の素材表面硬さ25HRC以下の未焼入れ部としている。また、内輪5および転動体3はSUJ2等の高炭素クロム軸受鋼からなり、ズブ焼入れにより芯部まで58〜64HRCの範囲で硬化処理されている。   The hub wheel 4 is made of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and includes an inner rolling surface 4a 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 hardened to a range of 58 to 64 HRC by induction hardening from the base 6b to the small diameter step 4b. The caulking portion 4c is an unquenched portion having a surface hardness of 25HRC or less after forging. Further, the inner ring 5 and the rolling element 3 are made of high carbon chrome bearing steel such as SUJ2, and are hardened in the range of 58 to 64 HRC to the core part by quenching.

一方、外方部材2は、外周に懸架装置を構成するナックル(図示せず)に取り付けられるための車体取付フランジ2bを一体に有し、内周に内方部材1の複列の内側転走面4a、5aに対向する複列の外側転走面2a、2aが一体に形成されている。この外方部材2は、ハブ輪4と同様、S53C等の炭素0.40〜0.80wt%を含む中高炭素鋼で形成され、少なくとも複列の外側転走面2a、2aが高周波焼入れによって表面硬さを58〜64HRCの範囲に硬化処理されている。そして、これら両転走面2a、4aおよび2a、5a間に保持器7を介して複列の転動体3、3が転動自在に収容されている。   On the other hand, the outer member 2 integrally has a vehicle body mounting flange 2b to be attached to a knuckle (not shown) constituting a suspension device on the outer periphery, and double row inner rolling of the inner member 1 on the inner periphery. Double-row outer rolling surfaces 2a and 2a facing the surfaces 4a and 5a are integrally formed. This outer member 2 is formed of medium and high carbon steel containing carbon of 0.40 to 0.80 wt% such as S53C, as in the case of the hub wheel 4, and at least the double row outer raceway surfaces 2 a and 2 a are surfaced by induction hardening. Hardening is performed in the range of 58 to 64 HRC. And the rolling elements 3 and 3 of a double row are accommodated so that rolling is possible via the holder | retainer 7 between these rolling surfaces 2a, 4a and 2a, 5a.

外方部材2と内方部材1間に形成される環状空間の開口部のうちアウター側の開口部にはシール8が装着され、インナー側の開口部にはカバー9が装着され、軸受内部に封入された潤滑グリースの外部への漏洩と、外部から雨水やダスト等が軸受内部に侵入するのを防止している。   Among the openings of the annular space formed between the outer member 2 and the inner member 1, a seal 8 is attached to the opening on the outer side, and a cover 9 is attached to the opening on the inner side. This prevents leakage of the enclosed lubricating grease to the outside and prevents rainwater and dust from entering the bearing from the outside.

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

アウター側のシール8は、外方部材2のアウター側端部の内周に所定のシメシロを介して圧入された芯金10と、この芯金10に加硫接着によって一体に接合されたシール部材11とからなる一体型のシールで構成されている。芯金10は、オーステナイト系ステンレス鋼鈑(JIS規格のSUS304系等)や冷間圧延鋼鈑(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。   The outer-side seal 8 includes a core metal 10 that is press-fitted into the inner periphery of the outer-side end portion of the outer member 2 via a predetermined shimiro, and a seal member that is integrally joined to the core metal 10 by vulcanization adhesion. 11 and an integral seal. The metal core 10 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).

一方、シール部材11はNBR(アクリロニトリル−ブタジエンゴム)等の合成ゴムからなり、径方向外方に傾斜して形成され、車輪取付フランジ6のインナー側の側面に所定の軸方向シメシロをもって摺接するサイドリップ11aと、断面が円弧状に形成された基部6bに所定の軸方向シメシロをもって摺接するダストリップ11bと、軸受内方側に傾斜して形成され、基部6bに所定の径方向シメシロを介して摺接するグリースリップ11cとを有している。   On the other hand, the seal member 11 is made of synthetic rubber such as NBR (acrylonitrile-butadiene rubber), is formed to be inclined radially outward, and is in slidable contact with a side surface on the inner side of the wheel mounting flange 6 with a predetermined axial direction. A lip 11a, a dust lip 11b slidably in contact with a base 6b having a circular cross section formed in a predetermined axial direction, and a slant formed inwardly of the bearing, and is formed on the base 6b via a predetermined radial direction. And a grease lip 11c in sliding contact.

なお、シール部材11の材質としては、NBR以外にも、例えば、耐熱性に優れたHNBR(水素化アクリロニトリル・ブタジエンゴム)、EPDM(エチレンプロピレンゴム)等をはじめ、耐熱性、耐薬品性に優れたACM(ポリアクリルゴム)、FKM(フッ素ゴム)、あるいはシリコンゴム等を例示することができる。   In addition to NBR, the material of the seal member 11 is excellent in heat resistance and chemical resistance, such as HNBR (hydrogenated acrylonitrile butadiene rubber), EPDM (ethylene propylene rubber), etc., which are excellent in heat resistance. Examples thereof include ACM (polyacrylic rubber), FKM (fluororubber), and silicon rubber.

ここで、内輪5の外径にパルサリング12が圧入されている。このパルサリング12は、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L字状に、全体として円環状に形成された支持環13と、この支持環13のインナー側の側面に加硫接着等で一体に接合された磁気エンコーダ14とで構成されている。   Here, the pulsar ring 12 is press-fitted into the outer diameter of the inner ring 5. This pulsar ring 12 is pressed from a ferromagnetic steel plate, for example, a ferritic stainless steel plate (JIS standard SUS430, etc.) or a rust-proof cold rolled steel plate (JIS standard SPCC, etc.). Accordingly, the support ring 13 is formed in an L shape in an annular shape as a whole, and the magnetic encoder 14 is integrally joined to the inner side surface of the support ring 13 by vulcanization adhesion or the like.

支持環13は、内輪5の外径に圧入される円筒状の嵌合部13aと、この嵌合部13aから径方向内方に延びる立板部13bとを備えている。そして、この立板部13bに磁気エンコーダ14が一体に接合されている。この磁気エンコーダ14は、ゴム等のエラストマにフェライト等の磁性体粉が混入され、周方向に交互に磁極N、Sが着磁されて車輪の回転速度検出用のロータリエンコーダを構成している。   The support ring 13 includes a cylindrical fitting portion 13a that is press-fitted into the outer diameter of the inner ring 5, and a standing plate portion 13b that extends radially inward from the fitting portion 13a. The magnetic encoder 14 is integrally joined to the standing plate portion 13b. This magnetic encoder 14 is a rotary encoder for detecting the rotational speed of a wheel by mixing magnetic powder such as ferrite in an elastomer such as rubber and magnetizing magnetic poles N and S alternately in the circumferential direction.

なお、ここでは、ゴム磁石からなる磁気エンコーダ14を有するパルサリング12を例示したが、これに限らず、円周方向に交互に、かつ等間隔に特性が変化する構成であれば良く、複数の透孔や凹凸が形成された鋼板製のパルサリングであっても良いし、焼結合金で形成されたものでも良い。また、プラスチック磁石が接合されたものでも良い。   Although the pulsar ring 12 having the magnetic encoder 14 made of a rubber magnet is illustrated here, the present invention is not limited to this, and any configuration may be used as long as the characteristics change alternately in the circumferential direction and at equal intervals. It may be a pulsar ring made of steel plate in which holes and irregularities are formed, or may be formed of a sintered alloy. Further, a plastic magnet may be joined.

本実施形態では、外方部材2のインナー側の端部にカバー9が装着され、外方部材2のインナー側の開口部を閉塞している。このカバー9は、耐食性を有する鋼鈑、例えば、フェライト系ステンレス鋼版(JIS SUS430等)や冷間圧延鋼板(JIS SPCC等)でも良いが、後述する回転速度センサの感知性能に悪影響を及ぼさないように、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)で形成されるのが好ましい。   In the present embodiment, the cover 9 is attached to the inner side end of the outer member 2 and closes the inner side opening of the outer member 2. The cover 9 may be a steel plate having corrosion resistance, for example, a ferritic stainless steel plate (JIS SUS430, etc.) or a cold rolled steel plate (JIS SPCC, etc.), but does not adversely affect the sensing performance of a rotational speed sensor described later. Thus, it is preferable to form with a non-magnetic steel plate, for example, an austenitic stainless steel plate (JIS standard SUS304 or the like).

なお、カバー9は、耐食性を有する鋼鈑以外にも、例えば、冷間圧延鋼板にカチオン電着塗装により防錆皮膜が形成され、この防錆皮膜の下地処理(前処理)としてリン酸亜鉛処理が施されていても良い。これにより、リン酸亜鉛処理により素材となる鋼材の表面が化学反応で粗面化されるため、塗料の食い付きが良くなって付着性が向上し、防錆皮膜が剥がれ落ちることなく長期間に亘って発錆するのを防止することができると共に、外方部材2との嵌合部の気密性が向上する。   In addition to the steel plate having corrosion resistance, for example, the cover 9 has a rust-preventing film formed on a cold-rolled steel sheet by cationic electrodeposition coating, and zinc phosphate treatment is performed as a base treatment (pretreatment) of the rust-preventing film. May be given. As a result, the surface of the steel material as a raw material is roughened by a chemical reaction due to the zinc phosphate treatment, so that the biting of the paint is improved and the adhesion is improved, and the anticorrosive film is not peeled off for a long time. While being able to prevent rusting over, the airtightness of a fitting part with the outer member 2 improves.

カバー9は、外方部材2の端部内周に圧入される円筒状の嵌合部9aと、この嵌合部9aから径方向外方に延び、外方部材2のインナー側の端面2cに密着する重合部9bと、この重合部9bから軸方向に延びる円筒部9cと、後述するセンサユニット16が装着される底部9dとを備えている。本実施形態では、カバー9が外方部材2の端部に内嵌されているので、外嵌タイプに比べ、カバー9自体の剛性が高くなって気密性が向上すると共に、重合部9bが外方部材2の端面2cに密着されることにより、外方部材2に対するカバー9の位置決め精度が高くなり、エアギャップ調整が容易になって速度検出精度を向上させることができる。   The cover 9 is press-fitted into the inner periphery of the end portion of the outer member 2, and extends radially outward from the fitting portion 9 a, and is in close contact with the inner end surface 2 c of the outer member 2. And a cylindrical portion 9c extending in the axial direction from the overlapping portion 9b, and a bottom portion 9d to which a sensor unit 16 described later is mounted. In the present embodiment, since the cover 9 is fitted into the end of the outer member 2, the rigidity of the cover 9 itself is increased and the airtightness is improved as compared with the outer fitting type, and the overlapping portion 9b is By being in close contact with the end surface 2c of the side member 2, the positioning accuracy of the cover 9 with respect to the outer member 2 is increased, air gap adjustment is facilitated, and speed detection accuracy can be improved.

図2に拡大して示すように、カバー9の底部9dの径方向外方側で、磁気エンコーダ14と対向する部分には、軸方向に貫通する挿入孔15が形成されている。この挿入孔15はバーリング(縁曲げ)加工によって形成されると共に、このバーリング加工に伴ってアウター側に突出して形成される円筒状の装着部15aに弾性部材、例えば、挿入孔縁部に加硫によりゴムを一体成形する、もしくは挿入孔部にOリング17を介してセンサユニット16の挿入部16aが挿入されている。このセンサユニット16はPA66等の射出成形可能な合成樹脂で形成され、ホール素子、磁気抵抗素子(MR素子)等、磁束の流れ方向に応じて特性を変化させる磁気検出素子およびこの磁気検出素子の出力波形を整える波形整形回路が組み込まれたIC(図示せず)等が包埋され、車輪の回転速度を検出してその回転数を制御する自動車のABSを構成している。   As shown in FIG. 2 in an enlarged manner, an insertion hole 15 penetrating in the axial direction is formed in a portion facing the magnetic encoder 14 on the radially outer side of the bottom portion 9 d of the cover 9. The insertion hole 15 is formed by burring (edge bending) processing, and an elastic member, for example, vulcanized at the insertion hole edge portion, is formed on the cylindrical mounting portion 15a formed to protrude to the outer side along with the burring processing. Thus, the rubber is integrally molded, or the insertion portion 16a of the sensor unit 16 is inserted through the O-ring 17 into the insertion hole. The sensor unit 16 is made of injection-moldable synthetic resin such as PA66, and a magnetic detecting element such as a Hall element, a magnetoresistive element (MR element), etc., whose characteristics change according to the flow direction of magnetic flux, and the magnetic detecting element An IC (not shown) or the like in which a waveform shaping circuit for adjusting an output waveform is embedded is embedded, and constitutes an automobile ABS that detects the rotational speed of a wheel and controls its rotational speed.

また、挿入孔15の近傍に軸方向に貫通する通孔18が穿設され、この通孔18の内側に袋ナット19が溶接により固定されている。一方、センサユニット16にはボルト孔20aを有する取付フランジ部20が一体に形成されている。そして、取付フランジ部20のボルト孔20aを介して袋ナット19に固定ボルト21が螺着され、センサユニット16が固定されている。   Further, a through hole 18 penetrating in the axial direction is formed in the vicinity of the insertion hole 15, and a cap nut 19 is fixed inside the through hole 18 by welding. On the other hand, the sensor unit 16 is integrally formed with a mounting flange portion 20 having a bolt hole 20a. And the fixing bolt 21 is screwed by the cap nut 19 via the bolt hole 20a of the attachment flange part 20, and the sensor unit 16 is being fixed.

このように、本実施形態では、カバー9の底部9dに挿入孔15が形成され、バーリング加工によって軸方向に突出して円筒状の装着部15aが形成されているので、装着部15の剛性が向上し、センサユニット16を安定して支持することができると共に、センサユニット16の挿入性が向上し、取付フランジ部20のボルト孔20aとカバー9の通孔18との芯合せが容易となる。   Thus, in the present embodiment, the insertion hole 15 is formed in the bottom 9d of the cover 9, and the cylindrical mounting portion 15a is formed by protruding in the axial direction by burring, so that the rigidity of the mounting portion 15 is improved. In addition, the sensor unit 16 can be stably supported, the insertion property of the sensor unit 16 is improved, and the centering of the bolt hole 20a of the mounting flange portion 20 and the through hole 18 of the cover 9 is facilitated.

また、装着部15aにOリング17を介してセンサユニット16の挿入部16aが挿入されると共に、通孔18の内側に袋ナット19が溶接により固定され、取付フランジ部20のボルト孔20aを介してこの袋ナット19に固定ボルト21が螺着され、センサユニット16が固定されているので、密封性が向上して外部から泥水等の異物の侵入を確実に防止することができる。なお、ここでは、袋ナット19が溶接によってカバー9に固定されたものを例示したが、これに限らず、例えば、接着剤によって接合しても良いし、また、カバー9の内壁を塑性変形させて加締固定しても良い。   Further, the insertion portion 16 a of the sensor unit 16 is inserted into the mounting portion 15 a via the O-ring 17, and the cap nut 19 is fixed to the inside of the through hole 18 by welding, and the bolt hole 20 a of the mounting flange portion 20 is interposed. Since the fixing bolt 21 is screwed to the cap nut 19 and the sensor unit 16 is fixed, the sealing performance is improved and entry of foreign matter such as muddy water from the outside can be surely prevented. Here, the case where the cap nut 19 is fixed to the cover 9 by welding is illustrated, but the present invention is not limited to this. For example, the cap nut 19 may be joined by an adhesive, or the inner wall of the cover 9 may be plastically deformed. It may be fixed by crimping.

さらに、カバー9の密封性が向上することにより、インナー側の密封手段となるシールが不要となり、パルサリング12でも充分シール効果を発揮し、軸受内部に封入された潤滑グリースがカバー9側に漏洩するのを効果的に防止することができる。したがって、製造コストを最小限に抑えることができると共に、軸受の回転トルクを低減することができる。   Further, since the sealing performance of the cover 9 is improved, a seal as a sealing means on the inner side becomes unnecessary, and the pulsar ring 12 exhibits a sufficient sealing effect, and the lubricating grease enclosed in the bearing leaks to the cover 9 side. Can be effectively prevented. Therefore, the manufacturing cost can be minimized and the rotational torque of the bearing can be reduced.

図3に、図2のカバー9の変形例を示す。なお、この実施形態は、前述した実施形態と基本的にはカバー9の嵌合部の構成が異なるだけで、その他前述した実施形態と同一部品同一部位あるいは同様の機能を有する部品や部位には同じ符合を付して詳細な説明を省略する。   FIG. 3 shows a modification of the cover 9 of FIG. This embodiment basically differs from the above-described embodiment only in the configuration of the fitting portion of the cover 9, and other parts and parts having the same function or the same function as those of the above-described embodiment are used. The same reference numerals are assigned and detailed description is omitted.

このカバー22は、外方部材2の端部内周に圧入される円筒状の嵌合部22aと、この嵌合部22aから径方向外方に延び、外方部材2のインナー側の端面2cに密着する重合部9bと、この重合部9bから軸方向に延びる円筒部9cと、センサユニット16が装着される底部9dとを備えている。   The cover 22 has a cylindrical fitting portion 22a that is press-fitted into the inner periphery of the end portion of the outer member 2, and extends radially outward from the fitting portion 22a to the inner end surface 2c of the outer member 2. A superposed portion 9b that is in close contact, a cylindrical portion 9c that extends in the axial direction from the superposed portion 9b, and a bottom portion 9d to which the sensor unit 16 is attached are provided.

ここで、本実施形態では、カバー22の嵌合部22aの端部が薄肉に形成され、この端部に弾性部材23が加硫接着により一体に接合されている。弾性部材23はNBR等の合成ゴムからなり、端部に回り込んだ状態で接合され、外方部材2の端部内周に弾性嵌合されている。これにより、外方部材2との嵌合部の気密性が向上する。なお、カバー22の少なくとも嵌合部22aの板厚を他の部位よりも厚くすることにより、カバー22自体の剛性が高くなって気密性が一層向上する。   Here, in this embodiment, the end portion of the fitting portion 22a of the cover 22 is formed thin, and the elastic member 23 is integrally joined to the end portion by vulcanization adhesion. The elastic member 23 is made of synthetic rubber such as NBR, joined in a state of wrapping around the end portion, and is elastically fitted to the inner periphery of the end portion of the outer member 2. Thereby, the airtightness of a fitting part with the outward member 2 improves. In addition, by making the plate thickness of at least the fitting portion 22a of the cover 22 thicker than other portions, the rigidity of the cover 22 itself is increased and the airtightness is further improved.

図4に、図2のカバー9の他の変形例を示す。なお、この実施形態は、前述した実施形態と基本的にはカバー9の嵌合部の構成が異なるだけで、その他前述した実施形態と同一部品同一部位あるいは同様の機能を有する部品や部位には同じ符合を付して詳細な説明を省略する。   FIG. 4 shows another modification of the cover 9 of FIG. This embodiment basically differs from the above-described embodiment only in the configuration of the fitting portion of the cover 9, and other parts and parts having the same function or the same function as those of the above-described embodiment are used. The same reference numerals are assigned and detailed description is omitted.

このカバー24は、外方部材2の端部内周に圧入される円筒状の嵌合部24aと、この嵌合部24aから径方向外方に延び、外方部材2のインナー側の端面2cに密着する重合部9bと、この重合部9bから軸方向に延びる円筒部9cと、センサユニット16が装着される底部9dとを備えている。   The cover 24 has a cylindrical fitting portion 24 a that is press-fitted into the inner periphery of the end portion of the outer member 2, and extends radially outward from the fitting portion 24 a to the inner end surface 2 c of the outer member 2. A superposed portion 9b that is in close contact, a cylindrical portion 9c that extends in the axial direction from the superposed portion 9b, and a bottom portion 9d to which the sensor unit 16 is attached are provided.

ここで、本実施形態では、カバー24の嵌合部24aの端部に径方向外方に突出した環状凸部25が形成され、外方部材2の端部内周に形成された環状溝2dに係合されている。これにより、外方部材2との嵌合部の気密性が向上すると共に、車両の運転中に振動等によりカバー24が微動するのを防止し、長期間に亘って安定した検出精度を確保することができる。   Here, in the present embodiment, an annular convex portion 25 projecting radially outward is formed at the end portion of the fitting portion 24a of the cover 24, and the annular groove 2d formed on the inner periphery of the end portion of the outer member 2 is formed. Is engaged. As a result, the airtightness of the fitting portion with the outer member 2 is improved, and the cover 24 is prevented from being finely moved by vibration or the like during operation of the vehicle, thereby ensuring stable detection accuracy over a long period of time. be able to.

図5に、図2のカバー9の他の変形例を示す。なお、この実施形態は、前述した実施形態と基本的にはカバー9の装着部の構成が異なるだけで、その他前述した実施形態と同一部品同一部位あるいは同様の機能を有する部品や部位には同じ符合を付して詳細な説明を省略する。   FIG. 5 shows another modification of the cover 9 of FIG. This embodiment basically differs from the above-described embodiment only in the configuration of the mounting portion of the cover 9, and is the same for other parts and parts having the same parts or the same functions as the above-described embodiments. Detailed description will be omitted with reference numerals.

このカバー26は、外方部材2の端部内周に圧入される円筒状の嵌合部9aと、この嵌合部9aから径方向外方に延び、外方部材2のインナー側の端面2cに密着する重合部9bと、この重合部9bから軸方向に延びる円筒部9cと、センサユニット16が装着される底部26aとを備えている。   The cover 26 is press-fitted into the inner periphery of the end of the outer member 2 and has a cylindrical fitting portion 9a. The cover 26 extends radially outward from the fitting portion 9a and extends to the inner end surface 2c of the outer member 2. A superposed portion 9b that is in close contact, a cylindrical portion 9c that extends in the axial direction from the superposed portion 9b, and a bottom portion 26a to which the sensor unit 16 is mounted are provided.

ここで、本実施形態では、カバー26の底部9dに軸方向に貫通する挿入孔27が形成されている。この挿入孔27はバーリング加工によって円筒状の装着部27aが形成されると共に、この装着部27aの端部に内側に折曲される鍔部27bが形成されている。そして、Oリング17を介してセンサユニット16の挿入部16aが挿入されている。これにより、鍔部27bにOリング17が安定して保持することができ、組立工数を軽減することができると共に、センサユニット16の組立性が向上する。   Here, in the present embodiment, an insertion hole 27 penetrating in the axial direction is formed in the bottom 9d of the cover 26. The insertion hole 27 has a cylindrical mounting portion 27a formed by burring, and a flange portion 27b that is bent inwardly at the end of the mounting portion 27a. The insertion portion 16 a of the sensor unit 16 is inserted through the O-ring 17. Thereby, the O-ring 17 can be stably held on the flange portion 27b, the number of assembling steps can be reduced, and the assembling property of the sensor unit 16 is improved.

図6に、図2のカバー9の他の変形例を示す。なお、この実施形態は、前述した実施形態と基本的にはカバー9の装着部の構成が異なるだけで、その他前述した実施形態と同一部品同一部位あるいは同様の機能を有する部品や部位には同じ符合を付して詳細な説明を省略する。   FIG. 6 shows another modification of the cover 9 of FIG. This embodiment basically differs from the above-described embodiment only in the configuration of the mounting portion of the cover 9, and is the same for other parts and parts having the same parts or the same functions as the above-described embodiments. Detailed description will be omitted with reference numerals.

このカバー28は、外方部材2の端部内周に圧入される円筒状の嵌合部9aと、この嵌合部9aから径方向外方に延び、外方部材2のインナー側の端面2cに密着する重合部9bと、この重合部9bから軸方向に延びる円筒部9cと、センサユニット16が装着される底部28aとを備えている。   The cover 28 has a cylindrical fitting portion 9a that is press-fitted into the inner periphery of the end portion of the outer member 2, and extends radially outward from the fitting portion 9a, and is attached to the inner end surface 2c of the outer member 2. A superposed portion 9b that is in close contact, a cylindrical portion 9c that extends in the axial direction from the superposed portion 9b, and a bottom portion 28a to which the sensor unit 16 is mounted are provided.

ここで、本実施形態では、カバー28の底部28aに軸方向に貫通する挿入孔29が形成され、バーリング加工によって内周面が傾斜した装着部29aが形成されている。そして、Oリング17を介してセンサユニット16の挿入部16aが挿入されている。これにより、カバー28の加工性が向上し、簡単な構造でOリング17を安定して保持することができる。   Here, in this embodiment, an insertion hole 29 penetrating in the axial direction is formed in the bottom portion 28a of the cover 28, and a mounting portion 29a having an inclined inner peripheral surface is formed by burring. The insertion portion 16 a of the sensor unit 16 is inserted through the O-ring 17. Thereby, the workability of the cover 28 is improved, and the O-ring 17 can be stably held with a simple structure.

図7(a)に、図6のカバー28の変形例を示す。このカバー28’は、挿入孔30に突出して円筒状の装着部31が形成されると共に、この装着部31の根元部31aが円弧状の段付き形状に形成され、この根元部31aにOリング17が弾性装着されている。これにより、挿入孔30の入口径が実質的に大きくなり、センサユニット16の挿入性を向上させると共に、センサユニット16の挿入部16aに環状溝を形成してOリングを装着することなく装着部31の密封性を向上させることができ、低コスト化を図ることができる。   FIG. 7A shows a modification of the cover 28 of FIG. The cover 28 ′ protrudes into the insertion hole 30 to form a cylindrical mounting portion 31, and a root portion 31 a of the mounting portion 31 is formed in an arc-shaped stepped shape, and an O-ring is formed on the root portion 31 a. 17 is elastically mounted. As a result, the inlet diameter of the insertion hole 30 is substantially increased, improving the insertability of the sensor unit 16, and forming an annular groove in the insertion portion 16a of the sensor unit 16 without attaching an O-ring. The sealing property of 31 can be improved, and cost reduction can be achieved.

さらに、ここでは、挿入孔30の装着部31の内径d1とセンサユニット16の挿入部16aの外径d2との径差(d1−d2)が0〜1.0mmの範囲になるように、装着部31の案内すきまが所定値以下に規制されると共に、この装着部31の案内部の幅寸法Lが1.0mm以上に設定されている。これにより、装着部31の剛性が向上し、センサユニット16を安定して支持することができると共に、センサユニット16の挿入性が向上し、取付フランジ部20のボルト孔20aとカバー28’の通孔(図示せず)との芯合せが容易となる。さらに、装着部31の案内すきまを所定値以下に規制することにより、センサユニット16の挿入性を保ちつつ、この案内すきまがラビリンスシールの役割をなし、外部から泥水等の異物の侵入を防止でき、密封性を一層向上させることができる。   Further, here, the mounting is performed so that the diameter difference (d1-d2) between the inner diameter d1 of the mounting portion 31 of the insertion hole 30 and the outer diameter d2 of the insertion portion 16a of the sensor unit 16 is in the range of 0 to 1.0 mm. The guide clearance of the portion 31 is restricted to a predetermined value or less, and the width L of the guide portion of the mounting portion 31 is set to 1.0 mm or more. As a result, the rigidity of the mounting portion 31 is improved, and the sensor unit 16 can be stably supported, and the insertion property of the sensor unit 16 is improved, so that the bolt hole 20a of the mounting flange portion 20 and the cover 28 'are passed through. Centering with a hole (not shown) is facilitated. Further, by restricting the guide clearance of the mounting portion 31 to a predetermined value or less, the guide clearance serves as a labyrinth seal while maintaining the insertion property of the sensor unit 16 and can prevent entry of foreign matter such as muddy water from the outside. The sealing property can be further improved.

図7(b)に、(a)の変形例を示す。このカバー28”は、挿入孔30に突出して円筒状の装着部331形成されると共に、この装着部31の根元部31bが円筒状の段付き形状に形成され、この根元部31bにOリング17が弾性装着されている。これにより、前述した実施形態と同様、挿入孔30の入口径が実質的に大きくなり、センサユニット16の挿入性を向上させると共に、センサユニット16の挿入部16aに環状溝を形成してOリングを装着することなく装着部31の密封性を向上させることができ、低コスト化を図ることができる。   FIG. 7B shows a modified example of FIG. The cover 28 ″ protrudes into the insertion hole 30 and is formed with a cylindrical mounting portion 331. A base portion 31b of the mounting portion 31 is formed in a cylindrical stepped shape, and the O-ring 17 is formed on the base portion 31b. As a result, as in the above-described embodiment, the inlet diameter of the insertion hole 30 is substantially increased, and the insertion property of the sensor unit 16 is improved and the insertion portion 16a of the sensor unit 16 is annular. The sealing performance of the mounting portion 31 can be improved without forming a groove and mounting the O-ring, and the cost can be reduced.

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、外方部材の端部に鋼鈑プレス製のカバーが嵌着され、このカバーにセンサユニットが装着された従動輪側の内輪回転タイプの車輪用軸受装置に適用することができる。   The wheel bearing device with a rotational speed detection device according to the present invention is an inner ring rotation type on the driven wheel side in which a cover made of a steel plate press is fitted to the end of the outer member, and a sensor unit is mounted on this cover. It can be applied to a wheel bearing device.

1 内方部材
2 外方部材
2a 外側転走面
2b 車体取付フランジ
2c 外方部材のインナー側の端面
3 転動体
4 ハブ輪
4a、5a 内側転走面
4b 小径段部
4c 加締部
5 内輪
6 車輪取付フランジ
6a ハブボルト
6b 車輪取付フランジのインナー側の基部
7 保持器
8 アウター側のシール
9、22、24、26、28、28’、28” カバー
9a、13a、22a、24a 嵌合部
9b 重合部
9c 円筒部
9d、26a、28a 底部
10 芯金
11 シール部材
11a サイドリップ
11b ダストリップ
11c グリースリップ
12 パルサリング
13 支持環
13b 立板部
14 磁気エンコーダ
15、27、29、30 挿入孔
15a、27a、29a、31 装着部
16 センサユニット
16a 挿入部
17 Oリング
18 通孔
19 袋ナット
20 取付フランジ部
20a ボルト孔
21 固定ボルト
25 弾性部材
27b 鍔部
31a、31b 装着部の根元部
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 ボール
54 車輪取付フランジ
55 ハブ輪
55a、56a 内側転走面
55b 小径段部
56 内輪
57 保持器
58 加締部
59 シール
60 磁気エンコーダ
61 支持環
62 エンコーダ本体
63 カバー
64 主部
65 フランジ部
66 突き当て部
67 嵌合部
68 底板部
69 突部
69a 挿入部
69b 取付フランジ
70 膨出部
71 挿入孔
72 短円筒部
73 センサユニット
74 挿入部
75 係止溝
76 Oリング
77 凹部
78 段付凹部
79 大径部
80 小径部
81 ナット
82 取付フランジ部
83 通孔
84 芯金
85 ボルト
d1 装着部の内径
d2 挿入部の外径
L 装着部の幅寸法
DESCRIPTION OF SYMBOLS 1 Inner member 2 Outer member 2a Outer rolling surface 2b Car body mounting flange 2c End side of inner side of outer member 3 Rolling element 4 Hub wheel 4a, 5a Inner rolling surface 4b Small diameter step portion 4c Clamping portion 5 Inner ring 6 Wheel mounting flange 6a Hub bolt 6b Wheel mounting flange inner side base 7 Cage 8 Outer side seal 9, 22, 24, 26, 28, 28 ', 28 "Cover 9a, 13a, 22a, 24a Fitting portion 9b Superposition Part 9c Cylindrical part 9d, 26a, 28a Bottom part 10 Core 11 Seal member 11a Side lip 11b Dustrip 11c Grease lip 12 Pulsar ring 13 Support ring 13b Standing plate part 14 Magnetic encoder 15, 27, 29, 30 Insert holes 15a, 27a, 29a, 31 Mounting portion 16 Sensor unit 16a Insertion portion 17 O-ring 18 Through hole 19 Cap nut 20 Mounting flange Gr portion 20a Bolt hole 21 Fixing bolt 25 Elastic member 27b Gutter portion 31a, 31b Root portion 51 of mounting portion Outer member 51a Outer rolling surface 51b Car body mounting flange 52 Inner member 53 Ball 54 Wheel mounting flange 55 Hub wheel 55a, 56a Inner rolling surface 55b Small diameter step part 56 Inner ring 57 Cage 58 Clamping part 59 Seal 60 Magnetic encoder 61 Support ring 62 Encoder main body 63 Cover 64 Main part 65 Flange part 66 Abutting part 67 Fitting part 68 Bottom plate part 69 Projection Portion 69a insertion portion 69b mounting flange 70 bulging portion 71 insertion hole 72 short cylindrical portion 73 sensor unit 74 insertion portion 75 locking groove 76 O-ring 77 recess 78 stepped recess 79 large diameter portion 80 small diameter portion 81 nut 82 mounting flange portion 83 Through-hole 84 Core metal 85 Bolt d1 Inside diameter d2 of mounting part Outer diameter L of insertion part Width of mounting part

Claims (13)

内周に複列の外側転走面が一体に形成された外方部材と、
一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪とからなり、外周に前記複列の外側転走面に対向する複列の内側転走面が形成された内方部材と、
前記外方部材と内方部材のそれぞれの転走面間に転動自在に収容された複列の転動体と、
前記内輪に外嵌され、円周方向に特性を交互に、かつ等間隔に変化させたパルサリングと、
前記外方部材に嵌着されたカバーに装着されて前記パルサリングに所定のエアギャップを介して対峙する棒状のセンサユニットとを備え、
前記カバーが鋼鈑からプレス加工にて形成され、前記外方部材の端部内周に圧入される円筒状の嵌合部と、この嵌合部から径方向外方に延び、前記外方部材のインナー側の端面に密着する重合部と、この重合部から軸方向に延びる円筒部と、前記外方部材の開口部を閉塞する底部とを備えている回転速度検出装置付き車輪用軸受装置において、
前記カバーの底部の径方向外方部で、前記パルサリングと対向する部分に、軸方向に貫通する挿入孔が形成され、この挿入孔に縁曲げされてアウター側に突出する装着部が形成され、この装着部と、この装着部に嵌挿される前記センサユニットとの間に弾性部材が介装されると共に、前記挿入孔の近傍に軸方向に貫通する通孔が穿設され、この通孔の内側に袋ナットが固定され、この袋ナットに固定ボルトが螺着されて前記センサユニットが取付フランジ部を介して固定されていることを特徴とする回転速度検出装置付き車輪用軸受装置。
An outer member in which a double row outer rolling surface is integrally formed on the inner periphery;
A hub wheel integrally having a wheel mounting flange for mounting a wheel at one end, and having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub ring; An inner member in which a double row inner rolling surface facing the outer rolling surface of the double row is formed on the outer periphery,
A double row rolling element accommodated in a freely rolling manner between the rolling surfaces of the outer member and the inner member;
Pulsar ring that is externally fitted to the inner ring, and the characteristics are changed alternately and at equal intervals in the circumferential direction;
A rod-shaped sensor unit mounted on a cover fitted to the outer member and facing the pulsar ring via a predetermined air gap;
The cover is formed by pressing from a steel plate, and is fitted into a cylindrical fitting portion that is press-fitted into the inner periphery of the end portion of the outer member, and extends radially outward from the fitting portion. In the wheel bearing device with a rotational speed detection device comprising: a superposed portion that is in close contact with the inner end surface; a cylindrical portion that extends in the axial direction from the superposed portion; and a bottom portion that closes the opening of the outer member.
An insertion hole penetrating in the axial direction is formed in a portion facing the pulsar ring at a radially outer portion of the bottom portion of the cover, and a mounting portion that is bent at the insertion hole and protrudes to the outer side is formed. An elastic member is interposed between the mounting portion and the sensor unit inserted into the mounting portion, and a through hole penetrating in the axial direction is formed in the vicinity of the insertion hole. A wheel bearing device with a rotational speed detecting device, wherein a cap nut is fixed inside, a fixing bolt is screwed onto the cap nut, and the sensor unit is fixed via an attachment flange portion.
前記弾性部材がOリングである請求項1に記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotational speed detection device according to claim 1, wherein the elastic member is an O-ring. 前記装着部が円筒状に形成されている請求項1に記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotational speed detection device according to claim 1, wherein the mounting portion is formed in a cylindrical shape. 前記装着部の端部に内側に折曲される鍔部が形成され、この鍔部に前記弾性部材が保持されている請求項1または2に記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotation speed detection device according to claim 1, wherein a flange portion bent inward is formed at an end portion of the mounting portion, and the elastic member is held by the flange portion. 前記装着部が傾斜した内周面に形成され、この内周面に前記弾性部材が保持されている請求項1または2に記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotation speed detection device according to claim 1 or 2, wherein the mounting portion is formed on an inclined inner peripheral surface, and the elastic member is held on the inner peripheral surface. 前記装着部の根元部が円弧状の段付き形状に形成され、この根元部に前記弾性部材が弾性接触されている請求項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 bearing device for a wheel with a rotational speed detection device according to claim 1 or 2, wherein a root portion of the mounting portion is formed in an arc-shaped stepped shape, and the elastic member is elastically contacted with the root portion. 前記装着部の根元部が円筒状の段付き形状に形成され、この根元部に前記弾性部材が弾性接触されている請求項1または2に記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotation speed detection device according to claim 1 or 2, wherein a root portion of the mounting portion is formed in a cylindrical stepped shape, and the elastic member is elastically contacted with the root portion. 前記装着部の案内すきまが1.0mm以下に規制され、かつ、装着部の案内部の幅寸法が1.0mm以上に設定されている請求項1、3、5および6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 rotation according to any one of claims 1, 3, 5, and 6, wherein the guide clearance of the mounting portion is regulated to 1.0 mm or less, and the width dimension of the guide portion of the mounting portion is set to 1.0 mm or more. Wheel bearing device with speed detector. 前記カバーの嵌合部の端部が薄肉に形成され、この端部に弾性部材が加硫接着により端部に回り込んだ状態で一体に接合され、前記外方部材の端部内周に弾性嵌合されている請求項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 end of the fitting portion of the cover is formed to be thin, and an elastic member is integrally joined to this end in a state where it wraps around the end by vulcanization adhesion, and is elastically fitted to the inner periphery of the end of the outer member. The wheel bearing device with a rotational speed detection device according to any one of claims 1 to 8. 前記カバーの嵌合部の板厚は他の部位よりも厚く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 rotation speed detection device according to any one of claims 1 to 9, wherein a thickness of the fitting portion of the cover is formed to be thicker than other portions. 前記カバーの嵌合部の端部に径方向外方に突出する環状凸部が形成されると共に、前記外方部材の端部内周に環状溝が形成され、この環状溝に前記環状凸部が係合されている請求項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。   An annular convex portion protruding radially outward is formed at an end portion of the fitting portion of the cover, and an annular groove is formed on the inner periphery of the end portion of the outer member, and the annular convex portion is formed in the annular groove. The wheel bearing device with a rotational speed detection device according to any one of claims 1 to 8, which is engaged. 前記カバーがオーステナイト系ステンレス鋼鈑で形成されている請求項1乃至11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 11, wherein the cover is formed of an austenitic stainless steel plate. 前記カバーが冷間圧延鋼板にカチオン電着塗装により防錆皮膜が形成されている請求項1乃至11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 11, wherein the cover has a rust preventive film formed on a cold rolled steel plate by cationic electrodeposition coating.
JP2010173723A 2010-08-02 2010-08-02 Wheel bearing device with rotation speed detector Pending JP2012032329A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015101219A1 (en) * 2013-12-30 2015-07-09 博世汽车部件(苏州)有限公司 Wheel speed sensor device, sensor unit thereof, and vehicle using the wheel speed sensor device
JP2015152121A (en) * 2014-02-17 2015-08-24 日本精工株式会社 Rolling bearing unit with rotation speed detection device
CN111480015A (en) * 2017-12-18 2020-07-31 舍弗勒技术股份两合公司 Bearing device and module carrier for the bearing device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015101219A1 (en) * 2013-12-30 2015-07-09 博世汽车部件(苏州)有限公司 Wheel speed sensor device, sensor unit thereof, and vehicle using the wheel speed sensor device
JP2015152121A (en) * 2014-02-17 2015-08-24 日本精工株式会社 Rolling bearing unit with rotation speed detection device
CN111480015A (en) * 2017-12-18 2020-07-31 舍弗勒技术股份两合公司 Bearing device and module carrier for the bearing device
CN111480015B (en) * 2017-12-18 2022-01-18 舍弗勒技术股份两合公司 Bearing device and module carrier for the bearing device
US11226005B2 (en) 2017-12-18 2022-01-18 Schaeffler Technologies AG & Co. KG Bearing arrangements, and module carrier for them

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