PROBLEM TO BE SOLVED: To obtain a structure which can easily discharge foreign matters intruded from a clearance between an axial outer end face of an outer ring and an axial inside face of a rotation-side flange.SOLUTION: An outside diameter of an axial outer end face of an outer ring 2a is set larger than a diameter of an inscription circle of an inner end part of a through-hole 13a which is formed at a rotation-side flange 9a in a radial direction with a center axis of a wheel support rolling bearing unit 1a as a center. A cross section is set large at a portion in which an inside-diameter shifted portion of the through-hole 13a and the axial outer end face of the outer ring 2a oppose each other, and a speed of an airflow which is generated accompanied by the rotation of the rotation-side flange 9a is decelerated, thus increasing pressure in a labyrinth seal 25.SELECTED DRAWING: Figure 1

    【課題】外輪の軸方向外端面と回転側フランジの軸方向内側面との間の隙間から侵入した異物を外部空間に排出し易くできる構造を実現する。【解決手段】外輪2aの軸方向外端面の外径を、車輪支持用転がり軸受ユニット1aの中心軸を中心とする、回転側フランジ9aに設けた透孔13aの径方向内端部の内接円の直径よりも大きくする。これら各透孔13aの内径寄り部分と前記外輪2aの軸方向外端面とが対向する部分で断面積を大きくし、前記回転側フランジ9aの回転に伴って発生する気流の速度を小さくする事で、ラビリンスシール25内の圧力も大きくする。【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 :

    2017-03-02


    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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