To provide a hub unit bearing for a drive wheel capable of securing a necessary hardened layer thickness even at a root part of a knuckle flange, so that a bearing life can be improved.SOLUTION: Hardened layers 11e, 11f are formed on two rows of outer ring raceway surfaces 11a, 11b of an outer ring member 11 of a hub unit bearing 10, a knuckle flange 20 is formed on an outer diameter surface of the outer ring member 11, a thinned portion 21 on which the outer diameter surface of the outer ring member 11 is a convex surface, is formed on a root part of the knuckle flange 20 of the outer ring member 11, and the thinned portion 21 is formed in a manner that a line Cb indicating an inboard-side contact angle passes therethrough.SELECTED DRAWING: Figure 1

    【課題】ナックルフランジの根元部分においても、必要な硬化層の厚さを確保することができ、これにより、軸受寿命を向上することができる駆動輪用ハブユニット軸受を提供する。【解決手段】ハブユニット軸受10の外輪部材11の2列の外輪軌道面11a,11bに硬化層11e,11fが形成され、外輪部材11の外径面に、ナックルフランジ20が形成され、外輪部材11のナックルフランジ20の根元部分には、外輪部材11の外径面が凸曲面となる肉盗み部21が設けられ、肉盗み部21は、インボード側の接触角を示す線Cbが通過するように形成される。【選択図】図1


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    Title :

    HUB UNIT BEARING FOR DRIVE WHEEL


    Additional title:

    駆動輪用ハブユニット軸受


    Contributors:

    Publication date :

    2020-04-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

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



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