公开(公告)号：US20230358278A1

公开(公告)日：2023-11-09

申请号：US18246815

申请日：2021-09-27

Applicant: NSK LTD.

Inventor： Toshikazu YABE ,  Tomoaki MATSUMOTO ,  AZUMA ITO ,  Keisuke YOKOYAMA ,  Nariaki AIHARA ,  Shintaro HONDA

IPC: F16C33/78 ,  F16C33/41 ,  F16C33/44 ,  C10M107/02 ,  C08G69/26 ,  C09K3/10

CPC classification number: F16C33/78 ,  F16C33/41 ,  F16C33/44 ,  C10M107/02 ,  C08G69/26 ,  C09K3/10 ,  C10M2205/0206 ,  C10N2040/02

Abstract: Provided is a rolling bearing using a retainer, particularly a highly reliable retainer in which dimensional stability required for a retainer of an outer ring guide type, ductility required for a crown-type retainer, improvement in adhesion of grease with a poly-α-olefin oil or the like as a base oil, and deformation prevention at a high speed can be achieved. The rolling bearing includes at least an inner ring 1, an outer ring 3, a synthetic resin retainer 9, and a rolling element 7, in which the synthetic resin retainer 9 is formed of a polyamide resin composition including polyamide 410 and a reinforcing fiber material with a content of 0% by weight to 40% by weight.

公开(公告)号：US20240384759A1

公开(公告)日：2024-11-21

申请号：US18578533

申请日：2022-03-25

Applicant: NSK LTD.

Inventor： Toshikazu YABE ,  Keisuke YOKOYAMA ,  Shintaro HONDA ,  Nariaki AIHARA

IPC: F16C33/41 ,  F16C33/38

Abstract: [Problem] To provide a linear motion device using a highly reliable and environmentally friendly separator that improves a dimensional stability, ductility, and adhesion of greases based on poly-α-olefin oil, which are required for separators, and also prevents deformation at high speeds.
[Solution] Provided is a linear motion device including a linear motion body (15) that is fitted onto a screw shaft (11) and moves straight along the screw shaft (11), a large number of balls (B) held in a ball groove (14) formed on an inner surface side of the linear motion body (15) and rolling between the ball groove (14) and the screw shaft (11), a separator (100) interposed 10 between each ball (B), a circulation passage (18) formed in the linear motion body (15) and circulating the ball (B) from one end side of the ball groove (14) to the other end side, where at least one of the separator (100) and the circulation passage (18) is formed from polyamide 410 by injection molding.