PROBLEM TO BE SOLVED: To provide a structure which can prevent the contamination of a brake rotor constituting a disc brake even if grease leaks from a seal ring which seals an axial end opening of an internal space.SOLUTION: An axial outer end face of an outer ring 2a and an axial inside face of a thin-thickness part 20a closely oppose each other in an axial direction, and an axial outer end part internal peripheral face of the outer ring 2a and a continuous part 21a closely oppose each other in a radial direction, thus forming a labyrinth seal. A large-diameter step part 27 which is larger than in diameter than an inside diameter of the axial outer end face of the outer ring 2a is formed at the axial outer end part internal peripheral face of the outer ring 2a, and the large-diameter step part 27 is superimposed on a ridge part 22a which is formed at a radial outer end ridge of a heavy-thickness part 19a in the radial direction.SELECTED DRAWING: Figure 1

    【課題】内部空間の軸方向端部開口を塞ぐシールリングからグリースが漏洩した場合でも、ディスクブレーキを構成するブレーキロータを汚してしまう事の防止を図れる構造を実現する。【解決手段】外輪2aの軸方向外端面と薄肉部20aの軸方向内側面とが軸方向に近接対向すると共に、外輪2aの軸方向外端部内周面と連続部21aとが径方向に近接対向して、ラビリンスシールを形成している。外輪2aの軸方向外端部内周面には、外輪2aの軸方向外端面の内径よりも大径である大径段部27が形成されており、大径段部27は、厚肉部19aの径方向外端縁に形成された稜部22aと径方向に重畳している。【選択図】図1


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    Title :

    WHEEL SUPPORT ROLLING BEARING UNIT


    Additional title:

    車輪支持用転がり軸受ユニット


    Contributors:

    Publication date :

    2016-12-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

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



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