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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
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.