JP2004332938A - Assembled seal ring with encoder and rolling bearing unit supporting axle assembling the same - Google Patents

Assembled seal ring with encoder and rolling bearing unit supporting axle assembling the same Download PDF

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JP2004332938A
JP2004332938A JP2004211508A JP2004211508A JP2004332938A JP 2004332938 A JP2004332938 A JP 2004332938A JP 2004211508 A JP2004211508 A JP 2004211508A JP 2004211508 A JP2004211508 A JP 2004211508A JP 2004332938 A JP2004332938 A JP 2004332938A
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rotating
peripheral surface
encoder
wheel
fixed
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JP2004332938A5 (en
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Hirohide Ishida
博英 石田
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NSK Ltd
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NSK Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Regulating Braking Force (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To simultaneously secure a sealing property and combined strength of an encoder 4 to a slinger 3. <P>SOLUTION: A portion being sliding-contact with a forward edge of seal lips 11a to 11c is set to be a flat smooth surface with approximately 0.3 Ra at either of a rotary cylinder section 12 and a rotary circular ring section 13 forming the slinger 3, and a sealing property of a seal ring is secured accordingly. Further, a portion combined with the encoder 4 is set to have a rough surface with approximately 1.0 to 1.5 Ra so as to secure combination strength. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明に係るエンコーダ付組み合わせシールリングは、自動車の車輪を懸架装置に対し回転自在に支持する転がり軸受ユニットに組み込んで、この転がり軸受ユニットを密封すると共に、この転がり軸受ユニットにより支持された車輪の回転速度を検出する為に利用する。   A combined seal ring with an encoder according to the present invention is incorporated in a rolling bearing unit that rotatably supports a wheel of an automobile with respect to a suspension device, and seals the rolling bearing unit. Used to detect rotation speed.

自動車の車輪を懸架装置に対して回転自在に支持すると共に、アンチロックブレーキシステム（ＡＢＳ）やトラクションコントロールシステム（ＴＣＳ）を制御すべく、この車輪の回転速度を検出する為に従来から、例えば特許文献１に記載されている様なエンコーダ付転がり軸受ユニットが知られている。
又、転がり軸受ユニットの端部開口を塞ぐシールリングの一部にエンコーダを組み付ける構造も、例えば特許文献２〜７等に記載されている様に、従来から知られている。 In order to support the wheels of a vehicle rotatably with respect to a suspension system and to detect the rotation speed of the wheels in order to control an anti-lock brake system (ABS) or a traction control system (TCS), for example, a patent has been used. BACKGROUND ART A rolling bearing unit with an encoder as described in Document 1 is known.
A structure in which an encoder is assembled to a part of a seal ring that closes an end opening of a rolling bearing unit is also conventionally known, as described in Patent Documents 2 to 7, for example.

車輪の回転速度検出を磁気的に行なう場合、上記エンコーダとして、円周方向に亙り磁気特性が交互に（一般的には等間隔に）変化するものを使用する。この様に円周方向に亙って磁気特性が交互に変化するエンコーダとしては、磁性材に円周方向に亙り多数の除肉部と充実部とを交互に形成したもの、或はＳ極とＮ極とを交互に配置した永久磁石が使用される。
このうち、永久磁石製のエンコーダは、センサ側の構造を簡単に構成し、しかも低速時の検出精度を確保する面から、近年使用される場合が増大している。 When the rotational speed of the wheel is detected magnetically, an encoder whose magnetic characteristics alternate (generally at regular intervals) in the circumferential direction is used as the encoder. As such an encoder whose magnetic characteristics alternately change in the circumferential direction, an encoder in which a large number of thinned portions and solid portions are alternately formed in the magnetic material in the circumferential direction, or an S pole and Permanent magnets with alternating N poles are used.
Among them, permanent magnet encoders have been increasingly used in recent years from the viewpoint of simplifying the structure on the sensor side and ensuring detection accuracy at low speeds.

シールリングの一部にエンコーダを組み付ける構造を採用して、それぞれが円筒状である内周面と外周面との間の環状空間を塞ぐ場合で、シール性能を良好にする為には、シールリングとスリンガとを組み合わせた組み合わせシールリングを採用する事が好ましい。この場合には、スリンガを回転輪に、シールリングを静止輪に、それぞれ嵌合固定する。そして、このシールリングを構成するシールリップを上記スリンガの周面及び片側面に摺接させると共に、エンコーダをこのスリンガの他側面に添着する。   In order to improve the sealing performance when sealing the annular space between the inner and outer peripheral surfaces, each of which is cylindrical by adopting a structure in which an encoder is assembled to a part of the seal ring, a seal ring is required. It is preferable to employ a combination seal ring in which the seal ring and the slinger are combined. In this case, the slinger is fitted and fixed to the rotating wheel, and the seal ring is fitted to the stationary wheel. Then, the seal lip forming the seal ring is brought into sliding contact with the peripheral surface and one side surface of the slinger, and the encoder is attached to the other side surface of the slinger.

上述の様なエンコーダ付組み合わせシールリングを造る場合に従来は、スリンガの表面粗さを、全面に亙って同じとしていた。この為、このスリンガに対するエンコーダの結合強度の確保とシール性能の確保とを両立させる事が難しかった。この理由は、次の通りである。
即ち、上記エンコーダを上記スリンガに対し結合するには、ゴム磁石をこのスリンガに焼き付けしたり、接着剤により接着したりしている。何れの方法によりスリンガに対しエンコーダを結合固定するにしても、このスリンガの側面でこのエンコーダを結合固定する部分の表面粗さは粗い（表面粗さの値が大きい）事が望ましい。これに対して、シールリップの先端縁が摺接する、上記スリンガの周面及び側面は、表面粗さの値が小さな平滑面である事が、シール性確保の為には好ましい。
ところが、従来のエンコーダ付組み合わせシールリングを構成するスリンガの場合、上述の様に表面全体を同じ表面粗さとしていた為、上記エンコーダの結合強度の確保とシール性能の確保とを両立させる事が難しかった。 Conventionally, when making a combination seal ring with an encoder as described above, the surface roughness of the slinger is the same over the entire surface. For this reason, it has been difficult to achieve both the securing of the coupling strength of the encoder to the slinger and the securing of the sealing performance. The reason is as follows.
That is, in order to couple the encoder to the slinger, a rubber magnet is baked on the slinger or bonded with an adhesive. Whichever method is used to fix the encoder to the slinger, it is desirable that the portion of the side of the slinger where the encoder is joined and fixed has a large surface roughness (large surface roughness). On the other hand, it is preferable that the peripheral surface and the side surface of the slinger, on which the leading edge of the seal lip slides, are smooth surfaces having a small surface roughness value in order to ensure sealing performance.
However, in the case of a slinger constituting a conventional combination seal ring with an encoder, since the entire surface has the same surface roughness as described above, it is difficult to achieve both the securing of the coupling strength of the encoder and the securing of sealing performance. Was.

特開昭６４−２１２１９号公報JP-A-64-21219 特開平５−２６２３３号公報JP-A-5-26233 特開平５−２３８３６９号公報JP-A-5-238369 特開平６−２８１０１８号公報JP-A-6-281018 特開平９−２７４０５１号公報JP-A-9-274051 特開平１１−４４７０２号公報JP-A-11-44702 欧州特許公報EP 0 495 323 A1European Patent Publication EP 0 495 323 A1

本発明のエンコーダ付組み合わせシールリングとこれを組み込んだ車輪支持用転がり軸受ユニットは、この様な事情に鑑みて発明したものである。   The combined seal ring with encoder and the rolling bearing unit for supporting a wheel incorporating the same according to the present invention have been invented in view of such circumstances.

本発明のエンコーダ付組み合わせシールリングとこれを組み込んだ車輪支持用転がり軸受ユニットとのうち、請求項１に記載したエンコーダ付組み合わせシールリングは、静止輪の周面と回転輪の周面との間に存在する空間部の開口端部を塞ぐと共に、上記回転輪の回転速度を検出する為に使用する。
そして、上記静止輪の周面に固定されるシールリングと、上記回転輪の周面に固定される金属製のスリンガと、このスリンガに支持固定されるエンコーダとを備える。
又、上記シールリングは、上記静止輪の周面に嵌合固定される固定円筒部及びこの固定円筒部の端縁から上記回転輪の周面に向け折れ曲がった固定円輪部から成る芯金と、この芯金の全周に亙って添着された、シールリップを有する弾性材とを備える。
又、上記スリンガは、上記回転輪の周面に嵌合固定される回転円筒部と、この回転円筒部の端縁から上記静止輪の周面に向け折れ曲がった回転円輪部とを備えて、弾性材を備えず、上記回転円筒部の周面及び上記回転円輪部の片側面で上記シールリップの先端縁を摺接させる部分を平滑面とすると共に、上記回転円輪部の他側面で上記エンコーダを支持固定すべき面を上記周面及び片側面よりも表面粗さの値が大きい粗面としている。尚、本明細書で言う粗面とは、上記シールリップの先端縁を摺接させる平滑面に比較して粗い面を言い、必ずしも一般的に言われる粗面程粗くない場合も含む。
更に、上記エンコーダは、円周方向に亙ってＳ極とＮ極とを交互に配置した永久磁石製で、上記回転円輪部の他側面に結合固定されている。 Of the combination seal ring with an encoder of the present invention and the rolling bearing unit for wheel support incorporating the same, the combination seal ring with an encoder according to claim 1 is provided between the peripheral surface of the stationary wheel and the peripheral surface of the rotating wheel. It is used for closing the opening end of the space existing in the vehicle and detecting the rotation speed of the rotating wheel.
A seal ring fixed to the peripheral surface of the stationary wheel, a metal slinger fixed to the peripheral surface of the rotating wheel, and an encoder supported and fixed to the slinger are provided.
Further, the seal ring includes a fixed cylindrical portion fitted and fixed to the peripheral surface of the stationary wheel, and a core metal including a fixed circular portion bent from an edge of the fixed cylindrical portion toward the peripheral surface of the rotating wheel. And an elastic material having a seal lip attached over the entire circumference of the cored bar.
Further, the slinger includes a rotating cylindrical portion fitted and fixed to the peripheral surface of the rotating wheel, and a rotating circular portion bent from an end edge of the rotating cylindrical portion toward the peripheral surface of the stationary wheel, The elastic member is not provided, and a portion of the peripheral surface of the rotating cylindrical portion and the one side of the rotating circular portion where the leading edge of the seal lip slides is made a smooth surface, and the other surface of the rotating circular portion is The surface on which the encoder is to be supported and fixed is a rough surface having a larger surface roughness value than the peripheral surface and one side surface. In addition, the rough surface referred to in the present specification refers to a surface that is rougher than a smooth surface on which the leading edge of the seal lip is slid, and also includes a case that is not necessarily as rough as a generally referred to rough surface.
Further, the encoder is made of a permanent magnet in which S poles and N poles are alternately arranged in the circumferential direction, and is fixedly connected to the other side surface of the rotating ring.

又、請求項２に記載したエンコーダ付組み合わせシールリングを組み込んだ車輪支持用転がり軸受ユニットは、静止側周面に静止側軌道を有する静止輪と、回転側周面に回転側軌道を有し、車輪を支持固定自在とした回転輪と、これら静止側軌道と回転側軌道との間に転動自在に設けられた複数の転動体と、上記静止側周面の端部と上記回転側周面の端部との間に設けられた、請求項１に記載したエンコーダ付シールリングとから成る。   Further, a rolling bearing unit for wheel support incorporating the combination seal ring with the encoder according to claim 2 has a stationary wheel having a stationary side raceway on a stationary side peripheral surface, and a rotating side raceway on a rotating side peripheral surface, A rotating wheel capable of supporting and fixing wheels, a plurality of rolling elements rotatably provided between the stationary-side track and the rotating-side track, an end of the stationary-side peripheral surface, and the rotating-side peripheral surface And the seal ring with the encoder according to claim 1 provided between the end portion and the end portion.

上述の様に構成される本発明のエンコーダ付組み合わせシールリングにより、静止輪の周面と回転輪の周面との間を塞ぎ、これら両周面同士の間の空間内に異物が進入する事を防止すると同時に、この空間内に充填されたグリースが外部に漏洩する事を防止する作用、並びにセンサとの組み合わせにより上記回転輪の回転速度を検出する作用は、前述の各公報等に記載される等により従来から知られているエンコーダ付組み合わせシールリングの場合と同様である。
特に、本発明のエンコーダ付組み合わせシールリングの場合、スリンガを構成する回転円筒部の周面及び回転円輪部の片側面でシールリップの先端縁を摺接させる部分を平滑面としている為、十分なシール性の確保を図れる。これに対して、上記回転円輪部の他側面でエンコーダを支持固定すべき面を表面粗さの値が大きい粗面としている為、このエンコーダの上記スリンガに対する結合強度を大きくできる。
この為、本発明のエンコーダ付組み合わせシールリングとこれを組み込んだ車輪支持用転がり軸受ユニットは、優れたシール性を有し、しかも、回転速度検出装置による回転速度検出の信頼性を長期間に亙って維持できる。 With the combination seal ring with the encoder of the present invention configured as described above, the gap between the peripheral surface of the stationary wheel and the peripheral surface of the rotating wheel is blocked, and foreign matter enters the space between these two peripheral surfaces. At the same time as preventing the grease filled in this space from leaking to the outside, and detecting the rotation speed of the rotating wheel in combination with a sensor are described in the above-mentioned publications. This is the same as the case of a conventionally known combination seal ring with an encoder.
In particular, in the case of the combination seal ring with the encoder of the present invention, since the peripheral surface of the rotating cylindrical portion and the one side of the rotating circular portion that make up the slinger make the leading edge of the sealing lip slidably contact with the smooth surface, it is sufficient. Secure sealing performance. On the other hand, since the surface on the other side of the rotary ring to support and fix the encoder is a rough surface having a large surface roughness value, the coupling strength of the encoder to the slinger can be increased.
For this reason, the combination seal ring with the encoder of the present invention and the rolling bearing unit for supporting a wheel incorporating the same have excellent sealing properties, and furthermore, the reliability of the rotation speed detection by the rotation speed detecting device is maintained for a long period of time. Can be maintained.

図１〜２は、本発明の実施例を示している。先ず、図１に示した、エンコーダ付組み合わせシールリング１に就いて説明する。このエンコーダ付組み合わせシールリング１は、後述する外輪５（図２）の端部に内嵌固定するシールリング２と、鋼板或はステンレス鋼板等の磁性金属板製で、後述する内輪６（図２）の端部に外嵌固定するスリンガ３と、このスリンガ３に支持固定されるエンコーダ４とを備える。   1 and 2 show an embodiment of the present invention. First, the combination seal ring with encoder 1 shown in FIG. 1 will be described. The encoder-equipped seal ring 1 is made of a magnetic ring such as a steel plate or a stainless steel plate. The seal ring 2 is internally fixed to an end of an outer race 5 (FIG. 2). ) Is provided with a slinger 3 fitted and fixed to an end of the slinger, and an encoder 4 supported and fixed by the slinger 3.

又、上記シールリング２は、断面Ｌ字形で全体が円環状の芯金７と、弾性材８とから成る。このうちの芯金７は、軟鋼板等の金属板により、断面略Ｌ字形で全体を円環状に形成して成り、静止輪である上記外輪５の内周面に、締り嵌めにより内嵌固定される固定円筒部９と、この固定円筒部９の軸方向端縁から、回転輪である上記内輪６の外周面に向け、直径方向内方に折れ曲がった固定円輪部１０とを有する。又、上記弾性材８は、上記芯金７の全周に亙って添着されたもので、１乃至複数本（図示の例では３本）のシールリップ１１ａ〜１１ｃを有する。一般的には、上記弾性材８は、ゴム製とし、上記芯金７に対し焼き付けにより結合している。   The seal ring 2 is composed of a metal core 7 having an L-shaped cross section and an annular shape as a whole, and an elastic material 8. The core metal 7 is made of a metal plate such as a mild steel plate and has a substantially L-shaped cross section, and is formed in an annular shape. The core metal 7 is internally fixed to the inner peripheral surface of the outer ring 5 as a stationary ring by interference fitting. And a fixed circular portion 10 bent inward in the diametrical direction from the axial end edge of the fixed cylindrical portion 9 toward the outer peripheral surface of the inner ring 6 which is a rotating wheel. The elastic member 8 is attached along the entire circumference of the metal core 7, and has one or more (three in the illustrated example) seal lips 11a to 11c. Generally, the elastic member 8 is made of rubber and is bonded to the core metal 7 by baking.

又、上記スリンガ３は、上記内輪６の端部外周面に締り嵌めにより外嵌固定される回転円筒部１２と、この回転円筒部１２の軸方向端縁から上記外輪５の内周面に向け直径方向外方に折れ曲がった回転円輪部１３とを備える。又、上記スリンガ３は、弾性材を備えず、上記回転円筒部１２の外周面及び上記回転円輪部１３の片側面（図１〜２の左側面）で上記各シールリップ１１ａ〜１１ｃの先端縁を摺接させる部分を、表面粗さが０．３Ｒａ程度の平滑面としている。   The slinger 3 has a rotating cylindrical portion 12 fitted and fixed to an outer peripheral surface of an end portion of the inner ring 6 by interference fit, and an axial end edge of the rotating cylindrical portion 12 directed to an inner peripheral surface of the outer ring 5. A rotating ring portion 13 bent radially outward. Further, the slinger 3 does not include an elastic material, and has a tip of each of the seal lips 11a to 11c on the outer peripheral surface of the rotary cylindrical portion 12 and one side surface (the left side surface in FIGS. 1 and 2) of the rotary circular ring portion 13. A portion where the edge is brought into sliding contact is a smooth surface having a surface roughness of about 0.3 Ra.

更に、上記エンコーダ４は、円周方向に亙ってＳ極とＮ極とを交互に配置したゴム磁石製である。即ち、このエンコーダ４は、ゴム中にフェライト粉末を混入したゴム磁石を円輪状に形成したもので、軸方向（図１の左右方向）に亙って着磁している。着磁方向は、円周方向に亙って交互に且つ等間隔で変化させている。従って、上記エンコーダ４の側面にはＳ極とＮ極とが、円周方向に亙って交互に且つ等間隔で配置されている。この様なエンコーダ４は、上記回転円輪部１３の他側面（図１〜２の右側面）で上記各シールリップ１１ａ〜１１ｃとは反対側に位置する面に、この面を利用してフェライト粉末を混入したゴム材料をモールド成形する事により、添着支持されている。この様なエンコーダ４と上記回転円輪部１３の他側面との結合強度を確保する為に、この他側面は、表面粗さが１．０〜１．５Ｒａ程度の（上記外周面及び片側面に比較して粗い）粗面としている。   Further, the encoder 4 is made of a rubber magnet in which S poles and N poles are alternately arranged in the circumferential direction. That is, the encoder 4 is formed by forming a rubber magnet in which ferrite powder is mixed into rubber into a ring shape, and is magnetized in the axial direction (the left-right direction in FIG. 1). The magnetization directions are changed alternately and at equal intervals in the circumferential direction. Therefore, S poles and N poles are alternately arranged at equal intervals on the side surface of the encoder 4 in the circumferential direction. Such an encoder 4 is provided with a ferrite by utilizing this surface on the other side surface (the right side surface in FIGS. The rubber material mixed with the powder is attached and supported by molding. In order to secure the coupling strength between the encoder 4 and the other side surface of the rotary ring portion 13, the other side surface has a surface roughness of about 1.0 to 1.5 Ra (the outer peripheral surface and one side surface). (Rougher than).

上述の様に構成するエンコーダ付組み合わせシールリング１は、例えば図２に示す様な転がり軸受ユニット１４に組み込んで、この転がり軸受ユニット１４により懸架装置に対し回転自在に支持した車輪の回転速度を検出自在とする。図２に示した転がり軸受ユニット１４は、駆動輪（ＦＲ車及びＲＲ車の後輪、ＦＦ車の前輪、４ＷＤ車の全輪）を懸架装置に対し支持するものである。この様な転がり軸受ユニット１４を構成する、静止輪である外輪５は、静止側周面である内周面に複列の外輪軌道１５、１５を有する。又、この外輪５の外周面中間部には、この外輪５を懸架装置に対し支持固定する為の、外向フランジ状の取付部１６を設けている。   The combined seal ring 1 with the encoder configured as described above is incorporated in a rolling bearing unit 14 as shown in FIG. 2, for example, and detects the rotation speed of the wheel rotatably supported by the rolling bearing unit 14 with respect to a suspension device. Be free. The rolling bearing unit 14 shown in FIG. 2 supports drive wheels (rear wheels of FR and RR vehicles, front wheels of FF vehicles, and all wheels of 4WD vehicles) with respect to a suspension system. The outer ring 5, which is a stationary wheel, which constitutes such a rolling bearing unit 14, has double-row outer ring raceways 15, 15 on the inner peripheral surface, which is the stationary peripheral surface. An outer flange-shaped mounting portion 16 for supporting and fixing the outer ring 5 to a suspension device is provided at an intermediate portion of the outer peripheral surface of the outer ring 5.

又、上記外輪５の内側に、回転輪であるハブ１７及び内輪６を、この外輪５と同心に配置している。これらハブ１７及び内輪６は、組み合わされて回転輪を構成するもので、回転側周面であるこれらハブ１７及び内輪６の外周面には、それぞれ上記外輪軌道１５、１５と対向する、回転側軌道である内輪軌道１８、１８を形成している。又、上記ハブ１７の中心部には、スプライン孔１９を形成している。自動車への組み付け状態でここのスプライン孔１９には、図示しない等速ジョイントに付属のスプライン軸を挿入する。そして、この等速ジョイントに設けたハウジングの外端面と、このスプライン軸の先端部に螺合したナットとの間で、上記ハブ１７及び内輪６を軸方向両側から挟持する。尚、上記ハブ１７の外端開口部は、ナットの螺合緊締作業の後、図示しない蓋体を嵌着する事により塞ぐ。又、上記ハブ１７の外寄り（外とは、自動車への組み付け状態で幅方向外側となる部分を言い、図２で左）部分で、上記外輪５の外端開口から突出した部分に、車輪を支持する為のフランジ２２を設けている。図示しない車輪は、このフランジ２２に固設した図示しないスタッドにより、このフランジ２２に結合固定される。従って上記ハブ１７は、自動車の走行に伴って、上記車輪と共に回転する。   Further, a hub 17 and an inner ring 6 which are rotating wheels are arranged concentrically with the outer ring 5 inside the outer ring 5. The hub 17 and the inner race 6 are combined to form a rotating wheel, and the outer circumferential surfaces of the hub 17 and the inner race 6 which are the rotating peripheral surfaces are opposed to the outer raceways 15, 15, respectively. The inner raceways 18, 18, which are raceways, are formed. A spline hole 19 is formed in the center of the hub 17. A spline shaft attached to a constant velocity joint (not shown) is inserted into the spline hole 19 in an assembled state with the automobile. Then, the hub 17 and the inner ring 6 are sandwiched from both sides in the axial direction between the outer end surface of the housing provided in the constant velocity joint and the nut screwed to the tip of the spline shaft. The outer end opening of the hub 17 is closed by screwing a nut (not shown) after the nut is screwed and tightened. In addition, the outer side of the hub 17 (the outer side refers to a portion which is outward in the width direction when assembled to an automobile, and the left side in FIG. 2), and a portion protruding from an outer end opening of the outer ring 5 is provided with a wheel. Is provided. A wheel (not shown) is connected and fixed to the flange 22 by a stud (not shown) fixed to the flange 22. Therefore, the hub 17 rotates together with the wheels as the vehicle travels.

又、上記各外輪軌道１５、１５と上記各内輪軌道１８、１８との間には、転動体である玉２０、２０を、各列毎に複数個ずつ設けている。これら各玉２０、２０は、保持器２１、２１により、円周方向に互いに間隔をあけた状態で、転動自在に保持されている。従って上記ハブ１７は、上記外輪５の内側に回転自在に支持されている。尚、重量の嵩む自動車用の転がり軸受ユニットの場合には、転動体として、玉２０、２０に代えてテーパころを使用する場合もある。   Between the outer raceways 15, 15 and the inner raceways 18, 18, a plurality of balls 20, 20 as rolling elements are provided for each row. The balls 20, 20 are held by the retainers 21, 21 so as to be freely rolled while being spaced apart from each other in the circumferential direction. Therefore, the hub 17 is rotatably supported inside the outer ring 5. In the case of a heavy-duty rolling bearing unit for an automobile, tapered rollers may be used instead of the balls 20, 20 as the rolling elements.

更に、上記外輪５の外端部にはシールリング２３を内嵌固定し、このシールリング２３を構成するシールリップの先端縁を上記ハブ１７の中間部外周面に摺接させて、このハブ１７及び内輪６の外周面と外輪５の内周面との間に存在する空間２４の外端開口部を塞いでいる。前述の様に構成するエンコーダ付組み合わせシールリング１は、上述の様に構成する転がり軸受ユニット１４の内端部で、上記外輪５の内端部内周面と上記内輪６の内端部外周面との間に、上記空間２４の内端開口部を塞ぐ状態で組み付けている。即ち、上記外輪５の内端部に前記固定円筒部９を締り嵌めで内嵌固定すると共に、上記内輪６の内端部に前記回転円筒部１２を締り嵌めで外嵌固定している。又、この状態で、前記各シールリップ１１ａ、１１ｂ、１１ｃの先端縁を、図１に示す様に、上記回転円筒部１２の外周面及び前記回転円輪部１３の外側面に、全周に亙って摺接させる。又、前記エンコーダ４の内側面には、上記外輪５或は懸架装置の一部等、固定の部分に支持した図示しないセンサの検出部を、微小隙間を介して対向させる。   Further, a seal ring 23 is fitted and fixed to the outer end of the outer ring 5, and the leading edge of a seal lip constituting the seal ring 23 is slidably contacted with the outer peripheral surface of the intermediate portion of the hub 17. Further, the outer end opening of a space 24 existing between the outer peripheral surface of the inner race 6 and the inner peripheral surface of the outer race 5 is closed. The combined seal ring with encoder 1 configured as described above is provided at the inner end of the rolling bearing unit 14 configured as described above at the inner peripheral surface of the inner end of the outer race 5 and the outer peripheral surface of the inner end of the inner race 6. In this state, the inner end opening of the space 24 is closed. That is, the fixed cylindrical portion 9 is internally fixed to the inner end of the outer ring 5 by interference fitting, and the rotating cylindrical portion 12 is externally fixed to the inner end of the inner ring 6 by interference fitting. Further, in this state, the leading edges of the seal lips 11a, 11b, 11c are arranged on the outer peripheral surface of the rotary cylindrical portion 12 and the outer peripheral surface of the rotary ring portion 13 as shown in FIG. And slide over it. Further, a detection unit of a sensor (not shown) supported by a fixed portion such as the outer ring 5 or a part of the suspension device is opposed to the inner surface of the encoder 4 via a minute gap.

前述の様に構成し、上述の様に転がり軸受ユニット１４に組み付ける、本発明のエンコーダ付組み合わせシールリング１の場合には、前記スリンガ３を構成する回転円筒部１２の外周面及び回転円輪部１３の片側面で前記各シールリップ１１ａ〜１１ｃの先端縁を摺接させる部分を平滑面としている為、十分なシール性の確保を図れる。尚、上記回転円筒部１２の外周面及び回転円輪部１３の片側面のうち平滑面とする部分は、少なくとも上記各シールリップ１１ａ〜１１ｃの先端縁が摺接する部分であれば足りる。例えば、上記回転円筒部１２の外周面と回転円輪部１３の片側面との連続部には何れのシールリップの先端縁も摺接する事はないので、表面粗さの値を必ずしも小さくする必要はない。   In the case of the combination seal ring 1 with an encoder of the present invention, which is configured as described above and assembled to the rolling bearing unit 14 as described above, the outer peripheral surface of the rotary cylindrical portion 12 and the rotary circular portion forming the slinger 3 Since a portion of one side surface of the seal lip which makes the leading edge of each of the seal lips 11a to 11c slidably contact is a smooth surface, sufficient sealing performance can be ensured. It is sufficient that the outer surface of the rotating cylindrical portion 12 and the one side surface of the rotating annular portion 13 be smooth surfaces as long as at least the leading edges of the seal lips 11a to 11c are in sliding contact. For example, since the leading edge of any seal lip does not slidably contact a continuous portion between the outer peripheral surface of the rotary cylindrical portion 12 and one side surface of the rotary circular ring portion 13, the value of the surface roughness must be reduced. There is no.

これに対して、上記回転円輪部１３の他側面でエンコーダ４を支持固定すべき面を表面粗さの値が大きい粗面としている為、このエンコーダ４の上記スリンガ３に対する結合強度を大きくできる。この為、長期間に亙る使用によっても、上記エンコーダ４が上記スリンガ３から剥離したりする事を防止できて、上記エンコーダ付組み合わせシールリング１及びこれを組み込んだ車輪支持用転がり軸受ユニットの耐久性を確保し、回転速度検出の信頼性を長期間に亙って維持できる。尚、上記回転円筒部１２の内周面は、前記内輪６の内端部に嵌合固定した状態で、嵌合面をシールできる程度の表面粗さであれば良い。   On the other hand, the surface on which the encoder 4 is to be supported and fixed on the other side surface of the rotary ring portion 13 is a rough surface having a large surface roughness value, so that the coupling strength of the encoder 4 to the slinger 3 can be increased. . For this reason, the encoder 4 can be prevented from peeling off from the slinger 3 even when used for a long period of time, and the durability of the combined seal ring 1 with the encoder and the wheel supporting rolling bearing unit incorporating the encoder can be prevented. And the reliability of rotation speed detection can be maintained for a long period of time. Note that the inner peripheral surface of the rotating cylindrical portion 12 only needs to have such a surface roughness that the fitting surface can be sealed in a state of being fitted and fixed to the inner end of the inner ring 6.

本発明の実施例を示す部分拡大断面図。FIG. 2 is a partially enlarged cross-sectional view showing the embodiment of the present invention. 転がり軸受ユニットに組み込んだ状態を示す断面図。Sectional drawing which shows the state assembled in the rolling bearing unit.

符号の説明Explanation of reference numerals

１ エンコーダ付組み合わせシールリング
２ シールリング
３ スリンガ
４ エンコーダ
５ 外輪
６ 内輪
７ 芯金
８ 弾性材
９ 固定円筒部
１０ 固定円輪部
１１ａ、１１ｂ、１１ｃ シールリップ
１２ 回転円筒部
１３ 回転円輪部
１４ 転がり軸受ユニット
１５ 外輪軌道
１６ 取付部
１７ ハブ
１８ 内輪軌道
１９ スプライン孔
２０ 玉
２１ 保持器
２２ フランジ
２３ シールリング
２４ 空間 DESCRIPTION OF SYMBOLS 1 Combination seal ring with encoder 2 Seal ring 3 Slinger 4 Encoder 5 Outer ring 6 Inner ring 7 Core 8 Elastic material 9 Fixed cylindrical part 10 Fixed circular part 11a, 11b, 11c Seal lip 12 Rotating cylindrical part 13 Rotating circular part 14 Rolling Bearing unit 15 Outer ring raceway 16 Mounting part 17 Hub 18 Inner ring raceway 19 Spline hole 20 Ball 21 Cage 22 Flange 23 Seal ring 24 Space

Claims (2)

静止輪の周面と回転輪の周面との間に存在する空間部の開口端部を塞ぐと共に、この回転輪の回転速度を検出する為に使用するエンコーダ付組み合わせシールリングであって、 上記静止輪の周面に固定されるシールリングと、上記回転輪の周面に固定される金属製のスリンガと、このスリンガに支持固定されるエンコーダとを備え、
上記シールリングは、上記静止輪の周面に嵌合固定される固定円筒部及びこの固定円筒部の端縁から上記回転輪の周面に向け折れ曲がった固定円輪部から成る芯金と、この芯金の全周に亙って添着された、シールリップを有する弾性材とを備え、
上記スリンガは、上記回転輪の周面に嵌合固定される回転円筒部と、この回転円筒部の端縁から上記静止輪の周面に向け折れ曲がった回転円輪部とを備えて、弾性材を備えず、上記回転円筒部の周面及び上記回転円輪部の片側面で上記シールリップの先端縁を摺接させる部分を平滑面とすると共に、上記回転円輪部の他側面で上記エンコーダを支持固定すべき面を上記周面及び片側面よりも表面粗さの値が大きい粗面としており、
上記エンコーダは、円周方向に亙ってＳ極とＮ極とを交互に配置した永久磁石製で、上記回転円輪部の他側面に結合固定されている、
事を特徴とするエンコーダ付組み合わせシールリング。 A combined seal ring with an encoder for closing an open end of a space existing between a peripheral surface of a stationary wheel and a peripheral surface of a rotating wheel, and used for detecting a rotation speed of the rotating wheel, A seal ring fixed to the peripheral surface of the stationary wheel, a metal slinger fixed to the peripheral surface of the rotating wheel, and an encoder supported and fixed to the slinger,
The seal ring includes a fixed cylindrical portion fitted and fixed to the peripheral surface of the stationary wheel, and a cored bar including a fixed circular portion bent from an edge of the fixed cylindrical portion toward the peripheral surface of the rotating wheel. An elastic material having a seal lip attached around the entire circumference of the cored bar,
The slinger includes a rotating cylindrical portion fitted and fixed to the peripheral surface of the rotating wheel, and a rotating circular portion bent from an end edge of the rotating cylindrical portion toward the peripheral surface of the stationary wheel, and an elastic material. The surface of the rotating cylindrical portion and one side of the rotating circular portion which make the leading edge of the seal lip slidably contact with each other have a smooth surface, and the other surface of the rotating circular portion has the encoder. The surface to be supported and fixed is a rough surface having a larger surface roughness value than the peripheral surface and one side surface,
The encoder is made of a permanent magnet in which S poles and N poles are alternately arranged in the circumferential direction, and is fixedly coupled to the other side surface of the rotating ring.
Combination seal ring with encoder characterized by the following. 静止側周面に静止側軌道を有する静止輪と、回転側周面に回転側軌道を有し、車輪を支持固定自在とした回転輪と、これら静止側軌道と回転側軌道との間に転動自在に設けられた複数の転動体と、上記静止側周面の端部と上記回転側周面の端部との間に設けられた、請求項１に記載したエンコーダ付シールリングとから成るエンコーダ付組み合わせシールリングを組み込んだ車輪支持用転がり軸受ユニット。   A stationary wheel having a stationary track on the stationary peripheral surface, a rotating wheel having a rotating track on the rotating peripheral surface and supporting and fixing the wheel freely, and rolling between the stationary track and the rotating track. A plurality of rolling elements movably provided, and the seal ring with the encoder according to claim 1, provided between an end of the stationary side peripheral surface and an end of the rotating side peripheral surface. Roller bearing unit for wheel support incorporating a combined seal ring with encoder.
JP2004211508A 2004-07-20 2004-07-20 Assembled seal ring with encoder and rolling bearing unit supporting axle assembling the same Pending JP2004332938A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006329212A (en) * 2005-05-23 2006-12-07 Uchiyama Mfg Corp Sealing device with tone wheel
WO2009037963A1 (en) * 2007-09-21 2009-03-26 Ntn Corporation Magnetic encoder and rolling bearing

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006329212A (en) * 2005-05-23 2006-12-07 Uchiyama Mfg Corp Sealing device with tone wheel
US7926816B2 (en) 2005-05-23 2011-04-19 Uchiyama Manufacturing Corp. Sealing device with tone wheel
WO2009037963A1 (en) * 2007-09-21 2009-03-26 Ntn Corporation Magnetic encoder and rolling bearing
JP2009074628A (en) * 2007-09-21 2009-04-09 Ntn Corp Magnetic encoder and rolling bearing
US8297848B2 (en) 2007-09-21 2012-10-30 Ntn Corporation Magnetic encoder and rolling bearing

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