| 摘要 |
A rolling bearing assembly 1 includes: a hub shaft 2 ; a double-row hub bearing 4 disposed on an outer periphery of the hub shaft 2 and possessing first-row rolling elements 19 on an outer side and second-row rolling elements 20 on an inner side; and a spindle bearing S interposed between an axle shaft 5 and the hub shaft 2 . The spindle bearing S is located at place outside a range defined between working points K 1 , k 2 of the first-row and second-row rolling elements 19, 20 of the hub bearing 4 with respect to an axial direction of the hub shaft, whereby the whole body of the rolling bearing assembly 1 is increased in rigidity. Thus, the rolling bearing assembly is increased in rigidity as a whole, so as to be able to easily bear a moment load particularly applied to the hub shaft, as well as to ensure the strength of the hub shaft.
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