PROBLEM TO BE SOLVED: To obtain a structure which prevents the intrusion of a water component adhered to an external peripheral face of an outer ring 2 into an internal space 15 along the external peripheral face of the outer ring 2, and can sufficiently maintain the seal performance of seal lips 24d to 24f of an inside-diameter side seal material 25 even if the seal lips are used in an atmosphere in which the seal lips are liable to be exposed to ozone in use states.SOLUTION: A cored bar 17b constituting a seal ring 14c is formed of a rustproof metal. An external peripheral edge of an inside-diameter side seal material 25 is located inside a radial direction rather than a radial center position of a circular ring part 20a of the cored bar 17b, and an exposure part 27a is arranged at a radial outside position rather than the radial external peripheral edge of the inside-diameter side seal material 25 out of an axial outside face of the circular ring part 20a. Furthermore, an outside-diameter side seal material 28 in which the external peripheral edge is protruded to the outside of the radial direction rather than an outer end external peripheral face of an outer ring 2 is arranged outside the radial direction of the exposure part 27a out of the circular ring part 20a while covering the portion.

    【課題】外輪2の外周面に付着した水分が、この外輪2の外周面を伝って内部空間15に侵入する事を防止すると共に、使用状態でオゾンに曝らされ易い環境で使用される場合でも、内径側シール材25の各シールリップ24d〜24fのシール性能を十分に維持できる構造を実現する。【解決手段】シールリング14cを構成する芯金17bを、防錆性を有する金属製とする。又、前記内径側シール材25の外周縁部を、この芯金17bの円輪部20aの径方向中央位置よりも径方向内方に位置させると共に、この円輪部20aの軸方向外側面のうち、前記内径側シール材25の径方向外周縁よりも径方向外方位置に、露出部27aを設ける。更に、前記円輪部20aのうち、この露出部27aの径方向外方に、当該部分を覆う状態で、その外周縁部が前記外輪2の外端部外周面よりも径方向外方に突出した外径側シール材28を設ける。【選択図】図2


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    Title :

    SEAL RING AND ROLLING BEARING UNIT FOR SUPPORTING WHEEL WITH SEAL RING


    Additional title:

    シールリング及びシールリング付車輪支持用転がり軸受ユニット


    Contributors:

    Publication date :

    2015-07-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F16J Kolben , PISTONS / B60B VEHICLE WHEELS , Räder für Fahrzeuge / F16C SHAFTS , Wellen



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