公开(公告)号：USRE48843E1

公开(公告)日：2021-12-07

申请号：US16381315

申请日：2019-04-11

Applicant: NSK LTD.

Inventor： Naoki Matsuyama ,  Sumio Sugita ,  Yu Koiwa ,  Takaaki Anzai ,  Tamotsu Misawa ,  Masaru Terasaki

IPC: F16C33/66 ,  F16C33/46 ,  F16C33/38 ,  F16C19/16 ,  F16C19/26 ,  F16C33/56

Abstract: A rolling bearing includes an inner ring having an outer surface, an outer ring having an inner surface, a plurality of rolling elements rotatably disposed between the inner ring and the outer ring, and a retainer for retaining the rolling elements. The retainer is made of a resin material and is positioned with respect to the inner surface of the outer ring or the outer surface of the inner ring. The retainer includes a pair of annular portions axially arranged in parallel and a columnar portion coupling the annular portions. Then, the rolling bearing satisfies the following expression: AI=LH3/dm≥0.025 LH3/dm2≥0.025 mm2 in which H is a radial length of a section of the annular portion, L is an axial length of the same, and dm is PCD of the rolling element.