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.

公开(公告)号：US20170335891A1

公开(公告)日：2017-11-23

申请号：US15534604

申请日：2015-12-11

Applicant: NSK LTD.

Inventor： Masafumi HIKIDA ,  Yasuyuki MATSUDA ,  Ryuho MORITA ,  Hiroki MAEJIMA

IPC: F16C35/077 ,  F16C19/28 ,  F02B33/40 ,  F02B39/04

CPC classification number: F16C35/077 ,  F02B33/40 ,  F02B39/04 ,  F16C19/183 ,  F16C19/28 ,  F16C19/547 ,  F16C25/083 ,  F16C27/066 ,  F16C33/6666 ,  F16C35/063 ,  F16C35/067 ,  F16C2360/22 ,  F16C2360/43 ,  F16C2360/44 ,  F16C2361/61 ,  F16H13/06 ,  F16H57/043 ,  F16H57/0479 ,  F16H57/0487

Abstract: A friction roller type speed increaser (100) includes a high speed side shaft (11), a ring roller (21), a low speed side shaft (13), at least one fixed roller (15), at least one movable roller, and a housing (23) that surrounds the rollers. A bearing unit (45) that includes a cylindrical bearing housing (51) into which the high speed side shaft (11) is inserted, bearings (53 and 55) on an inner circumferential portion of the bearing housing (51) which rotatably support the high speed side shaft (11), an oil seal (59) which is provided at one end portion of the bearing housing (51) and closes an inner space including the bearings is floating-supported such that the bearing unit can move in a radial direction of the high speed side shaft (11) in a unit accommodating section (47) formed in the housing (23).