PROBLEM TO BE SOLVED: To realize a structure capable of preventing an assembling characteristic of a cap from being reduced and capable of assuring sufficiently a hermetic seal characteristic.SOLUTION: A fitted core grid 18a constituting a cap 16a is configured by an inner diameter side cylindrical part 29; an outward flange part 30 formed under a state where it is extended out of an inner end part in an axial direction of the inner diameter side cylindrical part 29 to outside in a radial direction; and an outer diameter side cylindrical part 31 formed under a state where it is extended out of the outer end part in a radial direction of the outward flange part 30. A portion of the cap main body 17a, a part positioned outside in a radial direction rather than the inner diameter side cylindrical part 29 and a part aligning with the outer diameter side cylindrical part 31 in respect to its axial direction is divided into an outer peripheral surface of the inner diameter side cylindrical part 29, an inner diameter side resin part 32 present between it and the inner peripheral surface of the outer diameter side cylindrical part 31; and an outer diameter side resin part 33 present at an outer diameter side of the outer peripheral surface of this outer diameter side cylindrical part 31.SELECTED DRAWING: Figure 1
【課題】キャップの組み付け性の低下を防止すると共に、密封性を十分に確保できる構造を実現する。【解決手段】キャップ16aを構成する嵌合芯金18aを内径側円筒部29と、この内径側円筒部29の軸方向内端部から径方向外側に延出した状態で形成された外向鍔部30と、この外向鍔部30の径方向外端部から軸方向外側に延出した状態で形成された外径側円筒部31とにより構成する。キャップ本体17aのうちで、前記内径側円筒部29よりも径方向外側に位置する部分のうち、軸方向に関して前記外径側円筒部31と整合する部分を、前記内径側円筒部29の外周面と、この外径側円筒部31の内周面との間に存在する内径側樹脂部32と、この外径側円筒部31の外周面の外径側に存在する外径側樹脂部33とに分割する。【選択図】図1
ROLLER BEARING UNIT FOR SUPPORTING WHEEL
車輪支持用転がり軸受ユニット
2017-09-07
Patent
Elektronische Ressource
Japanisch
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