ROLLING BEARING

To provide a rolling bearing capable of realizing low torque and low heat generation performance while securing coolant resistance.SOLUTION: A seal member 6 of a rolling bearing is a non-contact seal. An inner peripheral-side part 11 of the seal member 6 includes a seal base end portion 15 with a R...

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Hauptverfasser: HIRAMATSU KENGO, ATSUMI RYOSUKE
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a rolling bearing capable of realizing low torque and low heat generation performance while securing coolant resistance.SOLUTION: A seal member 6 of a rolling bearing is a non-contact seal. An inner peripheral-side part 11 of the seal member 6 includes a seal base end portion 15 with a R surface 15a, and a lip 8 connected to the seal base end portion 15. The lip 8 has a main lip 8 connected to an inner diameter-side end portion of the seal base end portion 15 and an auxiliary lip 8b. A tip end portion of the main lip 8a is offset to an axial inner side with respect to an axial outer end face of the seal member body 10, a ratio A1/A2 of an axial distance A1 from the axial outer end face of the seal member body 10 to the tip end portion of the main lip 8a, and a thickness A2 from the axial outer end face of the seal member body 10 to a tip end portion of the auxiliary lip 8b is 0.25-0.50, and the axial outer end face of the seal member body 10 is offset to an axial inner side with respect to a bearing end face.SELECTED DRAWING: Figure 2 【課題】耐クーラント性を確保しつつ低トルクおよび低発熱性を実現することができる転がり軸受を提供する。【解決手段】転がり軸受のシール部材6は非接触シールである。シール部材6の内周側部分11は、R面15aが形成されたシール基端部15と、シール基端部15に繋がるリップ8とを備える。リップ8は、シール基端部15の内径側端部に繋がる主リップ8aおよび副リップ8bを有する。主リップ8aの先端部を、シール部材本体10の軸方向外側端面よりも軸方向内側にオフセットし、シール部材本体10の軸方向外側端面から、主リップ8aの先端部までの軸方向距離A1と、シール部材本体10の軸方向外側端面から副リップ8bの先端部までの厚さA2との比A1/A2が0.25~0.50であり、かつ、シール部材本体10の軸方向外側端面を、軸受端面よりも軸方向内側にオフセットした。【選択図】図2