公开(公告)号：US20210054877A1

公开(公告)日：2021-02-25

申请号：US16979041

申请日：2019-03-08

Applicant: NSK LTD.

Inventor： Makoto ZEMBUTSU ,  Hiroaki YAMANAKA ,  Tomoyuki MIYAZAKI ,  Hiroki MAEJIMA

IPC: F16C19/36 ,  F16C33/46 ,  F16C33/10

Abstract: A holder of a tapered roller bearing is made of a resin, has a first gap between an axially inner end surface of a small-diameter-side annular part and small-diameter-side end surfaces of tapered rollers, has a second gap between an axially inner end surface of a large-diameter-side annular part and large-diameter-side end surfaces of the tapered rollers, and is provided to be capable of moving within a prescribed range along the axial direction. The surface of the axially inner end surface of the large-diameter-side annular part is rough, the large-diameter-side annular part is provided with one or more grooves which are oil-holding parts that hold the lubricating oil, and ends of the grooves are positioned to be capable of coming into contact with the tapered rollers.