To provide a wheel bearing device which can make an inside rolling face of an inner ring possess two different curvature radii without applying special processing to the inside rolling face of the inner ring.SOLUTION: A step thin-thickness part 5b which is recessed to a large-diameter side is arranged at an inner side of an inside diameter face of an inner ring 5, a caulking part 4c which is obtained by elastically deforming an end part of a small-diameter step part 4b of a hub ring 4 to the outside of a radial direction is fit to the step thin-thickness part 5b, and an inside rolling face 5a of the inner ring 5 is made to possess two different curvature radii by curving the large-diameter side of the inside rolling face 5a of the inner ring 5 so as to have a curvature radius R2 which is larger than a curvature radius R1 at a small-diameter side when retaining the inner ring 5 to the small-diameter step part 4b of the hub ring 4.SELECTED DRAWING: Figure 3
【課題】内輪の内側転走面に特別な加工を施すことなく、2つの異なる曲率半径を持たせることができる車輪用軸受装置を提供する。【解決手段】内輪5の内径面のインナ側に、大径側に凹む段差薄肉部5bを設け、この段差薄肉部5bに、ハブ輪4の小径段部4bの端部を径方向外方に塑性変形させた加締部4cを嵌め入れて、内輪5をハブ輪4の小径段部4bに抜け止めする際に、内輪5の内側転走面5aの大径側を、小径側の曲率半径R1より大きな曲率半径R2になるように湾曲させて、内輪5の内側転走面5aに2つの異なる曲率半径を持たせた。【選択図】図3
WHEEL BEARING DEVICE
車輪用軸受装置
2023-03-22
Patent
Electronic Resource
Japanese