JP2008180544A - Bearing device for wheel with revolution detector - Google Patents

Bearing device for wheel with revolution detector Download PDF

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Publication number
JP2008180544A
JP2008180544A JP2007012861A JP2007012861A JP2008180544A JP 2008180544 A JP2008180544 A JP 2008180544A JP 2007012861 A JP2007012861 A JP 2007012861A JP 2007012861 A JP2007012861 A JP 2007012861A JP 2008180544 A JP2008180544 A JP 2008180544A
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Japan
Prior art keywords
wheel
rotational speed
inner ring
bearing device
wheel bearing
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JP2007012861A
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Japanese (ja)
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Hiroshi Kawamura
浩志 河村
Kazunari Yamamoto
一成 山本
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2007012861A priority Critical patent/JP2008180544A/en
Priority to PCT/JP2008/000068 priority patent/WO2008090741A1/en
Publication of JP2008180544A publication Critical patent/JP2008180544A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for a wheel with a revolution detector capable of preventing invasion of foreign matter by heightening sealability of a detection part, and maintaining reliability over a long period by heightening detection accuracy. <P>SOLUTION: A cover 26 for constituting a sensor holder 10, including a non-magnetic steel plate having corrosion resistance, is composed of a cylindrical fitting part 11a externally fitted to the end of an outer member 5, a collar part 11b elongated therefrom to the inside in the radial direction, and a bottom part 11c extending furthermore to the inside in the radial direction. A bending part 26a is formed elongatively from the inner edge of the bottom part 11c in the inner ring 2 direction, and the inner diameter of the bending part 26a is formed smaller than the outer diameter of the inner ring 2, and a labyrinth seal 27 having a prescribed axial direction clearance between the inner ring 2 is constituted. Since the axial direction clearance is set in a range of 0.5-2.0 mm, a pebble or the like is prevented from directly colliding with an encoder 16 from the outside, to thereby prevent breakage thereof, and sealability of the detection part can be heightened. <P>COPYRIGHT: (C)2008,JPO&INPIT

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は、内輪50に外嵌されたエンコーダ51と、これ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、これに装着され、エンコーダ51に所定のエアギャップを介して対峙する回転速度センサ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. 8 is known as an example of such a wheel bearing device with a rotational speed detection device. This 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 a predetermined air to the encoder 51. And a rotation speed sensor 54 facing each other through a gap. 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の底部55c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 bottom portion 55c of the cover 55. The rotation speed sensor is connected to the holding portion 61. 54 is embedded. 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. It consists of.

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。
特開2006−145418号公報
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, the fixing work of the harness 62 can be simplified with a simple configuration, the assembling workability can be improved, and the cost can be reduced.
JP 2006-145418 A

然しながら、こうした従来の回転速度検出装置付き車輪用軸受装置は、路面に近くて厳しい環境下に曝されているため、エンコーダ51が、例えば、円周方向に磁極を交互に並べてなる磁気エンコーダで構成され、このエンコーダ51に所定のエアギャップを介して対峙する回転速度センサ54がホール素子等の磁気検出素子からなる場合、エンコーダ51と回転速度センサ54との間の検出部に泥塩水や磁性粉を含む泥水等の異物が侵入すると、検出精度が低下して信頼性が損なわれる恐れがある。   However, since the conventional wheel bearing device with a rotational speed detection device is exposed to a severe environment near the road surface, the encoder 51 is composed of, for example, a magnetic encoder in which magnetic poles are alternately arranged in the circumferential direction. When the rotational speed sensor 54 facing the encoder 51 through a predetermined air gap is composed of a magnetic detection element such as a Hall element, mud salt water or magnetic powder is added to the detection unit between the encoder 51 and the rotational speed sensor 54. If foreign matter such as muddy water containing water enters, the detection accuracy may be reduced and reliability may be impaired.

本発明は、このような事情に鑑みてなされたもので、検出部の密封性を高めて異物が侵入するのを防止すると共に、検出精度を高め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を目的としている。   The present invention has been made in view of such circumstances, and enhances the sealing performance of the detection unit to prevent the intrusion of foreign matter, and also enhances the detection accuracy and maintains the reliability over a long period of time. An object of the present invention is to provide a wheel bearing device with a rotational speed detection device.

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、外周にナックルに取り付けられるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪からなり、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、前記外方部材の端部に装着され、前記車輪の回転速度を検出する回転速度センサが配設されたセンサホルダと、前記内輪に外嵌され、前記回転速度センサに所定のエアギャップを介して対峙されたエンコーダとを備えた回転速度検出装置付き車輪用軸受装置において、前記センサホルダが、耐食性を有する鋼板製のカバーと、前記回転速度センサが包埋され、この回転速度センサの出力が取り出されるハーネスが結線された合成樹脂製の保持部とを備え、前記カバーが、前記外方部材の端部に外嵌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からなり、全体として円環状に形成されると共に、前記底部が前記内輪との間に所定のすきまを有するラビリンスシールを構成している。   In order to achieve such an object, the invention described in claim 1 of the present invention has a vehicle body mounting flange integrally attached to the knuckle on the outer periphery, and a double row outer rolling surface is integrally formed on the inner periphery. A hub wheel having a wheel mounting flange for mounting a wheel at one end and a small-diameter step portion extending in the axial direction on the outer periphery, and press-fitting into the small-diameter step portion of the hub ring An inner member formed of at least one inner ring and having a double row inner raceway facing the double row outer raceway on the outer periphery, and both the inner member and the outer member. A double row rolling element housed between the running surfaces so as to be freely rollable, a sensor holder mounted on an end of the outer member and provided with a rotational speed sensor for detecting the rotational speed of the wheel; An outer ring is fitted on the inner ring, and a predetermined air gap is provided to the rotational speed sensor. In the wheel bearing device with a rotational speed detection device provided with the encoder opposed to each other, the sensor holder includes a steel plate cover having corrosion resistance and the rotational speed sensor embedded, and an output of the rotational speed sensor A synthetic resin holding portion to which a harness from which the harness is taken out is connected, and the cover is fitted into a cylindrical fitting portion that is fitted onto an end portion of the outer member, and a radially inner portion from the fitting portion. And a bottom portion extending further inward in the radial direction from the flange portion, and is formed in an annular shape as a whole, and the bottom portion is connected to the inner ring. A labyrinth seal having a predetermined gap is formed.

このように、内輪回転タイプの回転速度検出装置付き車輪用軸受装置において、センサホルダが、耐食性を有する鋼板製のカバーと、回転速度センサが包埋され、この回転速度センサの出力が取り出されるハーネスが結線された合成樹脂製の保持部とを備え、カバーが、外方部材の端部に外嵌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からなり、全体として円環状に形成されると共に、底部が内輪との間に所定のすきまを有するラビリンスシールを構成しているので、エンコーダに外部から小石等が直接衝突して破損するのを防止することができると共に、検出部の密封性を高めて異物が侵入するのを防止し、検出精度を高め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。   Thus, in the wheel bearing device with a rotation speed detection device of the inner ring rotation type, the sensor holder is a steel plate cover having corrosion resistance, the rotation speed sensor is embedded, and the harness from which the output of the rotation speed sensor is taken out And a synthetic resin holding portion to which the wire is connected, and a cover that is fitted into a cylindrical fitting portion that is fitted onto the end portion of the outer member, and extends radially inward from the fitting portion. A labyrinth having a flange closely contacting the end face of the member and a bottom extending further radially inward from the flange, and having a predetermined clearance between the bottom and the inner ring. Since the seal is configured, it is possible to prevent pebbles etc. from directly colliding with the encoder from the outside, and to prevent the foreign matter from entering by improving the sealing performance of the detection unit. For a long time It is possible to provide a rotational speed detector equipped wheel support bearing device to maintain the reliability I.

好ましくは、請求項2に記載の発明のように、前記底部の内径が前記内輪の外径よりも小径に形成され、当該内輪との軸方向すきまが0.5〜2.0mmの範囲に設定されていれば、内輪との干渉を避け、かつ密封性を確保して異物が侵入するのを防止することができる。   Preferably, as in the invention described in claim 2, the inner diameter of the bottom portion is formed smaller than the outer diameter of the inner ring, and the axial clearance with the inner ring is set in a range of 0.5 to 2.0 mm. If this is done, it is possible to avoid interference with the inner ring, and to ensure the sealing performance and prevent foreign matter from entering.

また、請求項3に記載の発明のように、前記底部の内径と等速自在継手を構成する外側継手部材の外径との間に所定の径方向すきまからなるラビリンスシールが形成され、この径方向すきまが0.5〜3.0mmの範囲に設定されていれば、検出部の密封性を一段と高めることができる。   Further, as in the invention described in claim 3, a labyrinth seal having a predetermined radial clearance is formed between the inner diameter of the bottom portion and the outer diameter of the outer joint member constituting the constant velocity universal joint. If the direction clearance is set in the range of 0.5 to 3.0 mm, the sealing performance of the detection unit can be further enhanced.

また、請求項4に記載の発明のように、前記底部の径方向下部にドレーンが形成されていれば、例えカバー内に外部から雨水等の異物が浸入したとしても、異物がカバー内を流動落下し、底部の径方向下部から異物を排出させることができる。   Further, if a drain is formed at a lower portion in the radial direction of the bottom portion as in the invention described in claim 4, even if foreign matter such as rainwater enters from the outside into the cover, the foreign matter flows in the cover. The foreign matter can fall and be discharged from the bottom in the radial direction of the bottom.

また、請求項5に記載の発明のように、前記カバーが非磁性体の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。   Further, as in the invention described in claim 5, if the cover is made of a non-magnetic steel plate, the detection performance of the rotational speed sensor is not adversely affected, and accurate detection accuracy can be ensured. it can.

本発明に係る回転速度検出装置付き車輪用軸受装置は、外周にナックルに取り付けられるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪からなり、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、前記外方部材の端部に装着され、前記車輪の回転速度を検出する回転速度センサが配設されたセンサホルダと、前記内輪に外嵌され、前記回転速度センサに所定のエアギャップを介して対峙されたエンコーダとを備えた回転速度検出装置付き車輪用軸受装置において、前記センサホルダが、耐食性を有する鋼板製のカバーと、前記回転速度センサが包埋され、この回転速度センサの出力が取り出されるハーネスが結線された合成樹脂製の保持部とを備え、前記カバーが、前記外方部材の端部に外嵌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からなり、全体として円環状に形成されると共に、前記底部が前記内輪との間に所定のすきまを有するラビリンスシールを構成しているので、エンコーダに外部から小石等が直接衝突して破損するのを防止することができると共に、検出部の密封性を高めて異物が侵入するのを防止し、検出精度を高め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。   The wheel bearing device with a rotational speed detection device according to the present invention has an outer body integrally provided with a vehicle body mounting flange for being attached to a knuckle on the outer periphery, and an outer side in which a double row outer rolling surface is integrally formed on the inner periphery. And a hub wheel integrally having a wheel mounting flange for mounting a wheel at one end thereof and having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one press-fitted into the small-diameter step portion of the hub ring An inner member formed of two inner rings and having an outer periphery formed with a double-row inner rolling surface facing the double-row outer rolling surface, and between both rolling surfaces of the inner member and the outer member. A double row rolling element accommodated in a freely rolling manner, a sensor holder mounted on an end of the outer member and provided with a rotational speed sensor for detecting the rotational speed of the wheel, and an outer fit on the inner ring Through a predetermined air gap to the rotational speed sensor In a wheel bearing device with a rotational speed detection device provided with a wrinkled encoder, the sensor holder includes a steel plate cover having corrosion resistance and the rotational speed sensor embedded, and an output of the rotational speed sensor is taken out. A synthetic resin holding portion to which a harness to be connected is connected, and the cover is fitted into a cylindrical fitting portion that is fitted onto an end portion of the outer member, and radially inward from the fitting portion. The flange portion extends and is in close contact with the end surface of the outer member, and a bottom portion that extends further radially inward from the flange portion, and is formed in an annular shape as a whole, and the bottom portion is between the inner ring and the inner ring. Since the labyrinth seal with a predetermined clearance is constructed, it is possible to prevent pebbles and the like from directly colliding with the encoder from the outside, and to prevent the foreign matter from invading by improving the sealing performance of the detection unit. Prevent And, it is possible to provide a rotational speed detector equipped wheel support bearing device to maintain the reliability for a long term to improve the detection accuracy.

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に対向する一方の内側転走面と、この内側転走面から軸方向に延びる円筒状の小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入され、外周に前記複列の外側転走面に対向する他方の内側転走面が形成された内輪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、前記外方部材の端部に装着され、前記車輪の回転速度を検出する回転速度センサが配設されたセンサホルダと、前記内輪に外嵌され、前記回転速度センサに所定のエアギャップを介して対峙されたエンコーダとを備えた回転速度検出装置付き車輪用軸受装置において、前記センサホルダが、耐食性を有する非磁性体の鋼板製のカバーと、前記回転速度センサが包埋され、この回転速度センサの出力が取り出されるハーネスが結線された合成樹脂製の保持部とを備え、前記カバーが、前記外方部材の端部に外嵌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からなると共に、前記底部の内径が前記内輪の外径よりも小径に形成されて内輪との間に所定の軸方向すきまを有するラビリンスシールが構成され、この軸方向すきまが0.5〜2.0mm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 formed integrally with one inner rolling surface facing the outer rolling surface of the double row on the outer periphery, and a cylindrical small diameter step portion extending in an axial direction from the inner rolling surface; and An inner member comprising an inner ring press-fitted into a small-diameter step portion of the hub wheel and having the other inner rolling surface facing the outer rolling surface of the double row formed on the outer periphery, and the inner member and the outer member A sensor in which a double row rolling element is rotatably accommodated between both rolling surfaces of the member, and a rotational speed sensor which is mounted on an end of the outer member and detects the rotational speed of the wheel. The holder and the inner ring are externally fitted, and the rotational speed sensor has a predetermined air gap. In the wheel bearing device with a rotational speed detection device provided with the encoder opposed to each other, the sensor holder includes a non-magnetic steel plate cover having corrosion resistance and the rotational speed sensor embedded therein. And a synthetic resin holding part to which a harness from which the output of the speed sensor is taken out is connected, and the cover is a cylindrical fitting part fitted on the end of the outer member, and the fitting part And a bottom portion extending further inward in the radial direction from the flange portion, and the inner diameter of the bottom portion is larger than the outer diameter of the inner ring. Also, a labyrinth seal having a predetermined axial clearance between the inner ring and the inner ring is formed, and the axial clearance is set in a range of 0.5 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一実施形態を示す縦断面図、図2は、図1の側面図、図3は、図1の要部拡大図、図4は、図1のカバーを示す正面図、図5は、本発明に係るカバーを示す要部拡大図、図6は、図5の変形例を示す要部拡大図、図7は、同じく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(図面左側)、中央寄り側をインナー側(図面右側)という。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 is a longitudinal sectional view showing an embodiment of a wheel bearing device with a rotational speed detection device according to the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is an enlarged view of a main part of FIG. 4 is a front view showing the cover of FIG. 1, FIG. 5 is an enlarged view of the main part showing the cover according to the present invention, FIG. 6 is an enlarged view of the main part showing a modification of FIG. 5, and FIG. It is a principal part enlarged view which shows an example. In the following description, the side closer to the outer side of the vehicle in a state assembled to the vehicle is referred to as the outer side (left side in the drawing), and the side closer to the center is referred to as the inner side (right side in the drawing).

この回転速度検出装置付き車輪用軸受装置は駆動輪用の第3世代と称され、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 that is inserted through 4 and 4.

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には外周にインナー側(他方)の内側転走面2aが形成された内輪2が所定のシメシロを介して圧入固定されている。   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 having an inner side (the other side) inner raceway surface 2a formed on the outer periphery thereof is press-fitted and fixed to the small-diameter step portion 1b of the hub wheel 1 through a predetermined shimiro.

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、内周には前記内方部材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の外側転走面5a、5aと、これらに対向する複列の内側転走面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の端部にはシール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. The inner member 3 is integrally formed with double row outer rolling surfaces 5a, 5a facing the double row inner rolling surfaces 1a, 2a. These outer rolling surfaces 5a and 5a are subjected to a hardening process in a range of 58 to 64 HRC by induction hardening. Double row rolling elements 4, 4 are accommodated between outer rolling surfaces 5a, 5a of the outer member 5 and double row inner rolling surfaces 1a, 2a facing the outer rolling surfaces 5a, 5a, respectively. It is held so that it can roll freely. Further, seals 8 and 9 are attached to the end portion of the outer member 5 to prevent leakage of lubricating grease sealed inside the bearing and intrusion of rainwater, dust, etc. into the bearing from the outside.

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、アウター側のシール8が摺接するシールランド部6bから内側転走面1aおよび小径段部1bに亙って高周波焼入れによって表面硬さを58〜64HRCの範囲に硬化処理が施されている。これにより、車輪取付フランジ6の基部となるシールランド部6bの耐摩耗性が向上するばかりでなく、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。   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 extends from the seal land portion 6b in which the outer seal 8 is in sliding contact to the inner rolling surface 1a and the small diameter step portion 1b. Thus, the surface hardness is set to a range of 58 to 64 HRC by induction hardening. As a result, not only the wear resistance of the seal land portion 6b serving as the base portion of the wheel mounting flange 6 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 wheel mounting flange is suppressed. 6 has a sufficient mechanical strength against the rotational bending load applied to 6, and the durability of the hub wheel 1 is improved.

本実施形態では、センサホルダ10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10は、カップ状に形成されたカバー11と、このカバー11に結合された保持部12とからなる。カバー11は外方部材5の外周に圧入される円筒状の嵌合部11aと、この嵌合部11aから径方向内方に延び、外方部材5の端面に密着する鍔部11bと、この鍔部11bからさらに径方向内方に延びる底部11cとからなり、全体として円環状に形成されている。   In the present embodiment, the sensor holder 10 is attached to the end of the outer member 5. The sensor holder 10 includes a cover 11 formed in a cup shape and a holding portion 12 coupled to the cover 11. The cover 11 has a cylindrical fitting portion 11a that is press-fitted into the outer periphery of the outer member 5, a flange portion 11b that extends radially inward from the fitting portion 11a, and is in close contact with the end surface of the outer member 5, The bottom portion 11c extends further inward in the radial direction from the flange portion 11b, and is formed in an annular shape as a whole.

このように、鍔部11bを外方部材5の端面に密着させた状態で、嵌合部11aが外方部材5の端部に外嵌されているので、センサホルダ10が外方部材5に対して容易に、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11は、耐食性を有するステンレス鋼板等をプレス加工にて形成されている。特に、カバー11が、後述する回転速度センサ14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。   Thus, since the fitting part 11a is externally fitted to the end part of the outer member 5 with the flange part 11b in close contact with the end surface of the outer member 5, the sensor holder 10 is attached to the outer member 5. On the other hand, it can be positioned and fixed easily and accurately, and the rotational speed of the wheel can be detected with high accuracy. The cover 11 is formed by pressing a corrosion-resistant stainless steel plate or the like. In particular, the cover 11 is formed of a non-magnetic steel plate, such as an austenitic stainless steel plate (JIS standard SUS304, etc.) so as not to adversely affect the sensing performance of the rotational speed sensor 14 described later. Is preferred.

カバー11における底部11cの径方向外方の一箇所には、回転速度センサ14が包埋された保持部12が結合されている。この保持部12は合成樹脂からなり、底部11cに形成された後述する固定部13に装着されている。   A holding part 12 in which the rotational speed sensor 14 is embedded is coupled to one place radially outward of the bottom part 11 c in the cover 11. The holding portion 12 is made of synthetic resin and is attached to a fixing portion 13 described later formed on the bottom portion 11c.

回転速度センサ14は、ホール素子、磁気抵抗素子(MR素子)等、磁束の流れ方向に応じて特性を変化させる磁気検出素子と、この磁気検出素子の出力波形を整える波形成形回路が組み込まれたICとからなる。   The rotational speed sensor 14 incorporates a magnetic detection element such as a Hall element, a magnetoresistive element (MR element) or the like that changes its characteristics according to the flow direction of the magnetic flux, and a waveform shaping circuit that adjusts the output waveform of the magnetic detection element. It consists of IC.

一方、図3に拡大して示すように、保持部12と軸方向に対向するように内輪2の外径にスリンガ15が圧入されている。このスリンガ15は、インナー側のシール9を構成し、内輪2に圧入される円筒部15aと、この円筒部15aから径方向外方に延びる立板部15bとからなる。なお、このスリンガ15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断面略L字状に形成されている。スリンガ15における立板部15bのインナー側の側面には、ゴム等のエラストマにフェライト等の磁性体粉が混入された磁気エンコーダ16が一体に加硫接着されている。この磁気エンコーダ16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。   On the other hand, as shown in an enlarged view in FIG. 3, a slinger 15 is press-fitted into the outer diameter of the inner ring 2 so as to face the holding portion 12 in the axial direction. The slinger 15 constitutes an inner seal 9 and includes a cylindrical portion 15a that is press-fitted into the inner ring 2, and a standing plate portion 15b that extends radially outward from the cylindrical portion 15a. The slinger 15 is made of a ferromagnetic steel plate, for example, a ferritic stainless steel plate (JIS standard SUS430 or the like) or a rust-proof cold rolled steel plate (JIS standard SPCC or the like). Are formed into a substantially L-shaped cross section by pressing. A magnetic encoder 16 in which magnetic powder such as ferrite is mixed in an elastomer such as rubber is integrally vulcanized and bonded to the inner side surface of the standing plate portion 15b in the slinger 15. The magnetic encoder 16 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.

インナー側のシール9は、前記スリンガ15と、このスリンガ15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17とからなる。このシール板17は、外方部材5の端部に内嵌される円筒部18aと、この円筒部18aの一端から径方向内方に延びる立板部18bとからなる芯金18と、この芯金18に加硫接着されたシール部材19とからなる。芯金18は、オーステナイト系ステンレス鋼鈑(JIS規格のSUS304系等)、あるいは、防錆処理された冷間圧延鋼鈑(JIS規格のSPCC系等)からプレス加工にて形成されている。   The inner-side seal 9 includes the slinger 15 and an annular seal plate 17 that is mounted on the outer member 5 so as to face the slinger 15 and has a substantially L-shaped cross section. The seal plate 17 includes a cored bar 18 including a cylindrical part 18a fitted into the end of the outer member 5, and a standing plate part 18b extending radially inward from one end of the cylindrical part 18a. The seal member 19 is vulcanized and bonded to the gold 18. The metal core 18 is formed by press working from an austenitic stainless steel plate (JIS standard SUS304 type or the like) or a rust-proof cold rolled steel plate (JIS standard SPCC type or the like).

シール部材19はゴム等の弾性部材からなり、前記スリンガ15の立板部15bに摺接するサイドリップ19aと、円筒部15aに摺接するグリースリップ19bおよび中間リップ19cとからなる。また、スリンガ15における立板部15bの外縁は、芯金18の円筒部18a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20を構成している。   The seal member 19 is made of an elastic member such as rubber, and includes a side lip 19a that is in sliding contact with the upright plate portion 15b of the slinger 15, and a grease lip 19b and an intermediate lip 19c that are in sliding contact with the cylindrical portion 15a. Further, the outer edge of the standing plate portion 15b of the slinger 15 is opposed to the cylindrical portion 18a of the core metal 18 through a slight radial clearance to form a labyrinth seal 20.

本実施形態では、インナー側のシール9とセンサホルダ10とが軸方向に対向配置され、シール9を構成するスリンガ15に磁気エンコーダ16が一体接合されると共に、センサホルダ10を構成する保持部12に回転速度センサ14が包埋され、この回転速度センサ14が、磁気エンコーダ16に軸方向すきま(エアギャップ)を介して対向配置されている。そして、図2に示すように、回転速度センサ14の出力がハーネス21によって取り出され、図示しないABSの制御器に送られる。なお、保持部12は、路面垂直方向に対して30〜90°の範囲に配設され、ハーネス21はこの保持部12からカバー11の接線方向に延び、回転速度センサ14に結線されている。これにより、ハーネス21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。   In the present embodiment, the inner seal 9 and the sensor holder 10 are disposed opposite to each other in the axial direction, and the magnetic encoder 16 is integrally joined to the slinger 15 constituting the seal 9, and the holding portion 12 constituting the sensor holder 10. The rotational speed sensor 14 is embedded, and the rotational speed sensor 14 is disposed opposite to the magnetic encoder 16 via an axial gap (air gap). Then, as shown in FIG. 2, the output of the rotation speed sensor 14 is taken out by the harness 21 and sent to an ABS controller (not shown). The holding portion 12 is disposed in a range of 30 to 90 ° with respect to the direction perpendicular to the road surface, and the harness 21 extends from the holding portion 12 in the tangential direction of the cover 11 and is connected to the rotation speed sensor 14. Thereby, the harness 21 can be easily taken out to the outer diameter side of the knuckle, and the assembling workability is improved.

ここで、カバー11に結合される保持部12の傾斜角θが路面垂直方向を基準に30°より小さくなれば、ハーネス21を過度に曲げてナックルの外径側へ取り出すことになり、保持部12に対してハーネス21の屈曲角度が大きくなる。これでは、内部配線への悪影響が生じて信頼性を損なう恐れがあり好ましくない。一方、傾斜角θが90°を超えると、ハーネス21自体の長さが必要以上に長くなり、組立作業が煩雑となって作業性が低下するだけでなく、ハーネス21がナックルや他の周辺部品に干渉し易くなるため、信頼性が低下する。   Here, if the inclination angle θ of the holding portion 12 coupled to the cover 11 is smaller than 30 ° with respect to the direction perpendicular to the road surface, the harness 21 is excessively bent and taken out to the outer diameter side of the knuckle. 12, the bending angle of the harness 21 increases. This is undesirable because it may adversely affect the internal wiring and impair reliability. On the other hand, when the inclination angle θ exceeds 90 °, the length of the harness 21 itself becomes unnecessarily long and the assembling work becomes complicated and the workability is deteriorated. In addition, the harness 21 is knuckle or other peripheral parts. Therefore, the reliability decreases.

また、図4に示すように、カバー11における底部11cの径方向外方の一箇所に固定部13が形成され、この固定部13に保持部12が結合されている。固定部13は、嵌合部11aと底部11cから軸方向に一部突出した箱形に形成されている。そして、保持部12が嵌挿される矩形の切欠き部22と、固定用の穴23が2つ穿設されている。保持部12はこの切欠き部22からその一部が嵌挿され、保持部12に形成された突起を固定用の穴23に係合させ、外側から加締めることによってカバー11に固定されている。これにより、ガタなく簡便に保持部12をカバーに結合することができる。なお、切欠き部22は矩形でなくとも内径側に開口したものであっても良い。また、固定用の穴23は2つに限らず、例えば、1個でも、また3個以上であっても良い。   Further, as shown in FIG. 4, a fixing portion 13 is formed at one place radially outward of the bottom portion 11 c in the cover 11, and the holding portion 12 is coupled to the fixing portion 13. The fixing portion 13 is formed in a box shape that partially protrudes in the axial direction from the fitting portion 11a and the bottom portion 11c. And the rectangular notch 22 in which the holding | maintenance part 12 is inserted and two holes 23 for fixing are drilled. A part of the holding part 12 is inserted from the notch part 22, the protrusion formed on the holding part 12 is engaged with the fixing hole 23, and is fixed to the cover 11 by caulking from the outside. . Thereby, the holding | maintenance part 12 can be couple | bonded with a cover simply without backlash. The notch 22 may not be rectangular but may be opened to the inner diameter side. Further, the number of fixing holes 23 is not limited to two, and may be one or three or more, for example.

ここでは、底部11cの径方向下部にまゆ形のドレーン24が形成されている。これにより、例えカバー11内に外部から雨水等の異物が浸入したとしても、異物がカバー11内を流動落下し、底部11cの径方向下部から異物を排出させることができる。このドレーン24としてまゆ形を例示したが、これに限らず、例えば、円孔であっても良いし、矩形状の孔であっても良い。   Here, an eyebrow-shaped drain 24 is formed at a lower portion in the radial direction of the bottom portion 11c. As a result, even if foreign matter such as rainwater enters the cover 11 from the outside, the foreign matter can flow down in the cover 11 and be discharged from the lower portion in the radial direction of the bottom portion 11c. Although the eyebrow shape was illustrated as this drain 24, it is not restricted to this, For example, a circular hole may be sufficient and a rectangular hole may be sufficient.

ここで、図5に示すように、カバー11の固定部13を除いてその底部11cの内縁が内輪2の外径に接近して形成され、内輪2との間にラビリンスシール25が形成されている。これにより、磁気エンコーダ16がこの底部11によって外部に露出することがないので、磁気エンコーダ16に外部から小石等が直接衝突して破損するのを防止することができると共に、検出部の密封性を高めて異物が侵入するのを防止し、検出精度を高め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。   Here, as shown in FIG. 5, the inner edge of the bottom portion 11 c is formed close to the outer diameter of the inner ring 2 except for the fixing portion 13 of the cover 11, and a labyrinth seal 25 is formed between the inner ring 2 and the inner ring 2. Yes. Thereby, since the magnetic encoder 16 is not exposed to the outside by the bottom portion 11, it is possible to prevent pebbles or the like from directly colliding with the magnetic encoder 16 from the outside and to be damaged, and to improve the sealing performance of the detection unit. Thus, it is possible to provide a wheel bearing device with a rotational speed detection device that can prevent the intrusion of foreign matter and enhance the detection accuracy and maintain the reliability over a long period of time.

図6に示すカバー26は、図5カバー11の変形例であるが、前述したカバー11の底部11cの内縁から内輪2方向に延長させて湾曲部26aが形成されている。この湾曲部26aの内径は内輪2の外径よりも小径に形成されると共に、底部11cから内輪2側に接近して所定の軸方向すきまを有するラビリンスシール27を構成している。これにより、検出部の密封性を一層高めて異物が侵入するのを防止することができる。なお、この軸方向すきまは内輪2との干渉を避け、かつ密封性を確保するために0.5〜2.0mmの範囲に設定されるのが好ましい。   A cover 26 shown in FIG. 6 is a modification of the cover 11 shown in FIG. 5, but a curved portion 26 a is formed extending from the inner edge of the bottom portion 11 c of the cover 11 in the direction of the inner ring 2. An inner diameter of the curved portion 26a is formed to be smaller than an outer diameter of the inner ring 2, and a labyrinth seal 27 having a predetermined axial clearance is formed by approaching the inner ring 2 side from the bottom portion 11c. Thereby, the sealing property of a detection part can be improved further and it can prevent that a foreign material penetrate | invades. The axial clearance is preferably set in the range of 0.5 to 2.0 mm in order to avoid interference with the inner ring 2 and to ensure sealing performance.

さらに、図7に変形例を示す。このカバー28は、鍔部11bから径方向内方に底部28aが形成され、この底部28aの内縁が内輪2だけでなく、等速自在継手を構成する外側継手部材29の外径と僅かな径方向すきまを介して対向し、ラビリンスシール30を構成している。これにより、検出部の密封性を一段と高めることができる。なお、この径方向すきまは外側継手部材29との干渉を避け、かつ密封性を確保するために0.5〜3.0mmの範囲に設定されるのが好ましい。   Furthermore, a modification is shown in FIG. The cover 28 has a bottom portion 28a formed radially inward from the flange portion 11b. The inner edge of the bottom portion 28a is not only the inner ring 2 but also an outer diameter of the outer joint member 29 constituting the constant velocity universal joint and a slight diameter. The labyrinth seal 30 is configured to face each other via a directional clearance. Thereby, the sealing performance of a detection part can be improved further. The radial clearance is preferably set in the range of 0.5 to 3.0 mm in order to avoid interference with the outer joint member 29 and to ensure sealing performance.

なお、ここでは回転速度検出装置として、磁気エンコーダ16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14とからなるアクティブタイプの回転速度検出装置を例示したが、本発明に係る回転速度検出装置はこれに限らず、例えば、磁気エンコーダと、磁石と巻回された環状のコイル等からなるパッシブタイプであっても良い。   Here, as an example of the rotational speed detection device, an active type rotational speed detection device including a magnetic encoder 16 and a rotational speed sensor 14 including a magnetic detection element such as a Hall element is illustrated, but the rotational speed detection device according to the present invention is illustrated. The apparatus is not limited to this, and may be, for example, a passive type including a magnetic encoder, a magnet, and an annular coil wound around.

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た車輪用軸受装置に適用することができる。   The wheel bearing device with a rotation speed detection device according to the present invention can be applied to a wheel bearing device in which any type of rotation speed detection device is built in the inner ring rotation structure.

本発明に係る車輪用軸受装置の一実施形態を示す縦断面図である。It is a longitudinal section showing one embodiment of a wheel bearing device concerning the present invention. 同上、側面図である。It is a side view same as the above. 図1の要部拡大図である。It is a principal part enlarged view 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. 同上、カバーを示す要部拡大図である。It is a principal part enlarged view which shows a cover same as the above. 図5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 FIG. 同上、さらに変形例を示す要部拡大図である。It is the principal part enlarged view which shows a modification further same as the above. 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.

符号の説明Explanation of symbols

1・・・・・・・・・・・・ハブ輪
1a、2a・・・・・・・・内側転走面
1b・・・・・・・・・・・小径段部
1c・・・・・・・・・・・セレーション
2・・・・・・・・・・・・内輪
3・・・・・・・・・・・・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
6・・・・・・・・・・・・車輪取付フランジ
6a・・・・・・・・・・・ハブボルト
6b・・・・・・・・・・・シールランド部
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・・・・・・・・・・・センサホルダ
11、26、28・・・・・カバー
11a・・・・・・・・・・嵌合部
11b・・・・・・・・・・鍔部
11c、28a・・・・・・底部
12・・・・・・・・・・・保持部
13・・・・・・・・・・・固定部
14・・・・・・・・・・・回転速度センサ
15・・・・・・・・・・・スリンガ
15a、18a・・・・・・円筒部
15b、18b・・・・・・立板部
16・・・・・・・・・・・磁気エンコーダ
17・・・・・・・・・・・シール板
18・・・・・・・・・・・芯金
19・・・・・・・・・・・シール部材
19a・・・・・・・・・・サイドリップ
19b・・・・・・・・・・グリースリップ
19c・・・・・・・・・・中間リップ
20、25、27、30・・ラビリンスシール
21・・・・・・・・・・・ハーネス
22・・・・・・・・・・・切欠き部
23・・・・・・・・・・・穴
24・・・・・・・・・・・ドレーン
26a・・・・・・・・・・湾曲部
29・・・・・・・・・・・外側継手部材
50・・・・・・・・・・・内輪
51・・・・・・・・・・・エンコーダ
52・・・・・・・・・・・外方部材
53・・・・・・・・・・・センサホルダ
54・・・・・・・・・・・回転速度センサ
55・・・・・・・・・・・カバー
55a・・・・・・・・・・嵌合部
55b・・・・・・・・・・鍔部
55c・・・・・・・・・・底部
56・・・・・・・・・・・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・・・・・・・・・・・保持部
62・・・・・・・・・・・ハーネス
63・・・・・・・・・・・取出し口
64・・・・・・・・・・・外側継手部材
α、β、θ・・・・・・・・傾斜角
1. Hub wheel 1a, 2a ... Inner rolling surface 1b ... Small diameter step 1c ... .... Serration 2 .... Inner ring 3 ... Inner member 4 ...・ Rolling element 5 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outer member 5a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Outer rolling surface 5b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Car body mounting flange 6 ... Wheel mounting flange 6a ... Hub bolt 6b ... Seal land 7 ... ·············································· Outer seal 9 .... Sensor holder 11, 26, 28 ... Cover 11a ... ············································································································ ····································································· Slinger 15a, 18a 15b, 18b ... Standing plate portion 16 ... Magnetic encoder 17 ... Seal plate 18 ...・ ・ Core 19 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Sealing member 19a ・ ・ ・ ・ ・ ・ Side lip 19b ・ ・ ・ ・ ・ ・ Grease lip 19c・ ・ ・ Intermediate lips 20, 25, 27, 30 ... Labyrinth seal 21 ... Harness 22 ... Notch 23 ... ... ... Drain 24a ... Drain 26a ... Bending part 29 ... Outer joint member 50 ... .... Inner ring 51 ... Encoder 52 ... Outer member 53 ... Sensor holder 54 ········ Rotational speed sensor 55 ·········· Cover 55a ... Hut 55c ... Bottom 56 ... Seal 57 ... Slinger 57a ...・ ・ ・ ・ Cylindrical part 57b ・ ・ ・ ・ ・ ・ Standing plate part 58 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Seal plate 59 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Core 60 ・..... Seal member 60a ... ..Side lip 60b ... Grease lip 60c ... Intermediate lip 61 ... Holding part 62 ... ··· Harness 63 ····························································· Outside joint members α, β, θ Corner

Claims (5)

外周にナックルに取り付けられるための車体取付フランジを一体に有し、内周に複列の外側転走面が一体に形成された外方部材と、
一端部に車輪を取り付けるための車輪取付フランジを一体に有し、外周に軸方向に延びる小径段部が形成されたハブ輪、およびこのハブ輪の小径段部に圧入された少なくとも一つの内輪からなり、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、
前記外方部材の端部に装着され、前記車輪の回転速度を検出する回転速度センサが配設されたセンサホルダと、
前記内輪に外嵌され、前記回転速度センサに所定のエアギャップを介して対峙されたエンコーダとを備えた回転速度検出装置付き車輪用軸受装置において、
前記センサホルダが、耐食性を有する鋼板製のカバーと、前記回転速度センサが包埋され、この回転速度センサの出力が取り出されるハーネスが結線された合成樹脂製の保持部とを備え、前記カバーが、前記外方部材の端部に外嵌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からなり、全体として円環状に形成されると共に、前記底部が前記内輪との間に所定のすきまを有するラビリンスシールを構成していることを特徴とする回転速度検出装置付き車輪用軸受装置。
An outer member integrally having a vehicle body mounting flange for being attached to the knuckle on the outer periphery, and an outer rolling surface of a double row integrally formed on the inner periphery;
From a hub wheel integrally having a wheel mounting flange for mounting a wheel at one end and having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring press-fitted into the small-diameter step portion of the hub ring An inner member in which a double row inner rolling surface facing the outer rolling surface of the double row is formed on the outer periphery,
A double row rolling element accommodated in a freely rolling manner between both rolling surfaces of the inner member and the outer member;
A sensor holder mounted on an end of the outer member and provided with a rotation speed sensor for detecting the rotation speed of the wheel;
In the wheel bearing device with a rotational speed detection device provided with an encoder externally fitted to the inner ring and opposed to the rotational speed sensor via a predetermined air gap,
The sensor holder includes a corrosion-resistant steel plate cover, and a synthetic resin holding portion in which a harness from which the rotation speed sensor is embedded and an output of the rotation speed sensor is taken out is connected. A cylindrical fitting portion fitted on the end portion of the outer member; a flange portion extending radially inward from the fitting portion and in close contact with the end surface of the outer member; and the flange portion And a bottom part extending radially inward, and formed in a ring shape as a whole, and the bottom part constitutes a labyrinth seal having a predetermined clearance with the inner ring. Wheel bearing device with speed detector.
前記底部の内径が前記内輪の外径よりも小径に形成され、当該内輪との軸方向すきまが0.5〜2.0mmの範囲に設定されている請求項1に記載の回転速度検出装置付き車輪用軸受装置。   The rotation speed detection device according to claim 1, wherein the inner diameter of the bottom portion is smaller than the outer diameter of the inner ring, and the axial clearance with the inner ring is set in a range of 0.5 to 2.0 mm. Wheel bearing device. 前記底部の内径と等速自在継手を構成する外側継手部材の外径との間に所定の径方向すきまからなるラビリンスシールが形成され、この径方向すきまが0.5〜3.0mmの範囲に設定されている請求項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。   A labyrinth seal having a predetermined radial clearance is formed between the inner diameter of the bottom and the outer diameter of the outer joint member constituting the constant velocity universal joint, and the radial clearance is in the range of 0.5 to 3.0 mm. The wheel bearing apparatus with a rotational speed detection apparatus of Claim 1 or 2 currently set. 前記底部の径方向下部にドレーンが形成されている請求項1乃至3いずれかに記載の回転速度検出装置付き車輪用軸受装置。   The wheel bearing device with a rotational speed detection device according to any one of claims 1 to 3, wherein a drain is formed at a lower portion in the radial direction of the bottom portion. 前記カバーが非磁性体の鋼鈑から形成されている請求項1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 rotational speed detection device according to any one of claims 1 to 4, wherein the cover is formed of a non-magnetic steel plate.
JP2007012861A 2007-01-23 2007-01-23 Bearing device for wheel with revolution detector Pending JP2008180544A (en)

Priority Applications (2)

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JP2007012861A JP2008180544A (en) 2007-01-23 2007-01-23 Bearing device for wheel with revolution detector
PCT/JP2008/000068 WO2008090741A1 (en) 2007-01-23 2008-01-23 Rotation speed detector-equipped bearing for wheel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007012861A JP2008180544A (en) 2007-01-23 2007-01-23 Bearing device for wheel with revolution detector

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JP2008180544A true JP2008180544A (en) 2008-08-07

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012255455A (en) * 2011-06-07 2012-12-27 Nsk Ltd Rolling bearing unit with encoder
JP2014219100A (en) * 2009-09-17 2014-11-20 Ntn株式会社 Wheel bearing device
CN113091796A (en) * 2021-04-06 2021-07-09 上海应用技术大学 Sensor thermal response performance detection device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014219100A (en) * 2009-09-17 2014-11-20 Ntn株式会社 Wheel bearing device
JP2012255455A (en) * 2011-06-07 2012-12-27 Nsk Ltd Rolling bearing unit with encoder
CN113091796A (en) * 2021-04-06 2021-07-09 上海应用技术大学 Sensor thermal response performance detection device
CN113091796B (en) * 2021-04-06 2022-07-15 上海应用技术大学 Sensor thermal response performance detection device

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